src/libANGLE/formatutils.cpp - platform/external/angle - Gitiles

 //
 // Copyright 2013 The ANGLE Project Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //

 // formatutils.cpp: Queries for GL image formats.

 #include "libANGLE/formatutils.h"

 #include "anglebase/no_destructor.h"
 #include "common/mathutil.h"
 #include "libANGLE/Context.h"
 #include "libANGLE/Framebuffer.h"

 using namespace angle;

 namespace gl
 {

 // ES2 requires that format is equal to internal format at all glTex*Image2D entry points and the
 // implementation can decide the true, sized, internal format. The ES2FormatMap determines the
 // internal format for all valid format and type combinations.
 GLenum GetSizedFormatInternal(GLenum format, GLenum type);

 namespace
 {
 bool CheckedMathResult(const CheckedNumeric<GLuint> &value, GLuint *resultOut)
 {
     if (!value.IsValid())
     {
         return false;
     }
     else
     {
         *resultOut = value.ValueOrDie();
         return true;
     }
 }

 constexpr uint32_t PackTypeInfo(GLuint bytes, bool specialized)
 {
     // static_assert within constexpr requires c++17
     // static_assert(isPow2(bytes));
     return bytes | (rx::Log2(bytes) << 8) | (specialized << 16);
 }

 }  // anonymous namespace

 FormatType::FormatType() : format(GL_NONE), type(GL_NONE) {}

 FormatType::FormatType(GLenum format_, GLenum type_) : format(format_), type(type_) {}

 bool FormatType::operator<(const FormatType &other) const
 {
     if (format != other.format)
         return format < other.format;
     return type < other.type;
 }

 bool operator<(const Type &a, const Type &b)
 {
     return memcmp(&a, &b, sizeof(Type)) < 0;
 }

 // Information about internal formats
 static bool AlwaysSupported(const Version &, const Extensions &)
 {
     return true;
 }

 static bool NeverSupported(const Version &, const Extensions &)
 {
     return false;
 }

 template <GLuint minCoreGLMajorVersion, GLuint minCoreGLMinorVersion>
 static bool RequireES(const Version &clientVersion, const Extensions &)
 {
     return clientVersion >= Version(minCoreGLMajorVersion, minCoreGLMinorVersion);
 }

 // Check support for a single extension
 template <ExtensionBool bool1>
 static bool RequireExt(const Version &, const Extensions &extensions)
 {
     return extensions.*bool1;
 }

 // Check for a minimum client version or a single extension
 template <GLuint minCoreGLMajorVersion, GLuint minCoreGLMinorVersion, ExtensionBool bool1>
 static bool RequireESOrExt(const Version &clientVersion, const Extensions &extensions)
 {
     return clientVersion >= Version(minCoreGLMajorVersion, minCoreGLMinorVersion) ||
            extensions.*bool1;
 }

 // Check for a minimum client version or two extensions
 template <GLuint minCoreGLMajorVersion,
           GLuint minCoreGLMinorVersion,
           ExtensionBool bool1,
           ExtensionBool bool2>
 static bool RequireESOrExtAndExt(const Version &clientVersion, const Extensions &extensions)
 {
     return clientVersion >= Version(minCoreGLMajorVersion, minCoreGLMinorVersion) ||
            (extensions.*bool1 && extensions.*bool2);
 }

 // Check for a minimum client version or at least one of two extensions
 template <GLuint minCoreGLMajorVersion,
           GLuint minCoreGLMinorVersion,
           ExtensionBool bool1,
           ExtensionBool bool2>
 static bool RequireESOrExtOrExt(const Version &clientVersion, const Extensions &extensions)
 {
     return clientVersion >= Version(minCoreGLMajorVersion, minCoreGLMinorVersion) ||
            extensions.*bool1 || extensions.*bool2;
 }

 // Check support for two extensions
 template <ExtensionBool bool1, ExtensionBool bool2>
 static bool RequireExtAndExt(const Version &, const Extensions &extensions)
 {
     return extensions.*bool1 && extensions.*bool2;
 }

 // Check support for either of two extensions
 template <ExtensionBool bool1, ExtensionBool bool2>
 static bool RequireExtOrExt(const Version &, const Extensions &extensions)
 {
     return extensions.*bool1 || extensions.*bool2;
 }

 // Check support for any of three extensions
 template <ExtensionBool bool1, ExtensionBool bool2, ExtensionBool bool3>
 static bool RequireExtOrExtOrExt(const Version &, const Extensions &extensions)
 {
     return extensions.*bool1 || extensions.*bool2 || extensions.*bool3;
 }

 static bool UnsizedHalfFloatOESRGBATextureAttachmentSupport(const Version &clientVersion,
                                                             const Extensions &extensions)
 {
     // dEQP requires ES3 + EXT_color_buffer_half_float for rendering to RGB[A] + HALF_FLOAT_OES
     // textures but WebGL allows it with just ES 2.0
     return (clientVersion.major >= 3 || extensions.webglCompatibility) &&
            extensions.colorBufferHalfFloat;
 }

 // R8, RG8
 static bool SizedRGSupport(const Version &clientVersion, const Extensions &extensions)
 {
     return clientVersion >= Version(3, 0) || (extensions.textureStorage && extensions.textureRG);
 }

 // R16F, RG16F with HALF_FLOAT_OES type
 static bool SizedHalfFloatOESRGSupport(const Version &clientVersion, const Extensions &extensions)
 {
     return extensions.textureStorage && extensions.textureHalfFloat && extensions.textureRG;
 }

 static bool SizedHalfFloatOESRGTextureAttachmentSupport(const Version &clientVersion,
                                                         const Extensions &extensions)
 {
     return SizedHalfFloatOESRGSupport(clientVersion, extensions) && extensions.colorBufferHalfFloat;
 }

 // R16F, RG16F with either HALF_FLOAT_OES or HALF_FLOAT types
 static bool SizedHalfFloatRGSupport(const Version &clientVersion, const Extensions &extensions)
 {
     // HALF_FLOAT
     if (clientVersion >= Version(3, 0))
     {
         return true;
     }
     // HALF_FLOAT_OES
     else
     {
         return SizedHalfFloatOESRGSupport(clientVersion, extensions);
     }
 }

 static bool SizedHalfFloatRGTextureAttachmentSupport(const Version &clientVersion,
                                                      const Extensions &extensions)
 {
     // HALF_FLOAT
     if (clientVersion >= Version(3, 0))
     {
         return extensions.colorBufferFloat;
     }
     // HALF_FLOAT_OES
     else
     {
         return SizedHalfFloatOESRGTextureAttachmentSupport(clientVersion, extensions);
     }
 }

 static bool SizedHalfFloatRGRenderbufferSupport(const Version &clientVersion,
                                                 const Extensions &extensions)
 {
     return (clientVersion >= Version(3, 0) ||
             (extensions.textureHalfFloat && extensions.textureRG)) &&
            (extensions.colorBufferFloat || extensions.colorBufferHalfFloat);
 }

 // RGB16F, RGBA16F with HALF_FLOAT_OES type
 static bool SizedHalfFloatOESSupport(const Version &clientVersion, const Extensions &extensions)
 {
     return extensions.textureStorage && extensions.textureHalfFloat;
 }

 static bool SizedHalfFloatOESTextureAttachmentSupport(const Version &clientVersion,
                                                       const Extensions &extensions)
 {
     return SizedHalfFloatOESSupport(clientVersion, extensions) && extensions.colorBufferHalfFloat;
 }

 // RGB16F, RGBA16F with either HALF_FLOAT_OES or HALF_FLOAT types
 static bool SizedHalfFloatSupport(const Version &clientVersion, const Extensions &extensions)
 {
     // HALF_FLOAT
     if (clientVersion >= Version(3, 0))
     {
         return true;
     }
     // HALF_FLOAT_OES
     else
     {
         return SizedHalfFloatOESSupport(clientVersion, extensions);
     }
 }

 static bool SizedHalfFloatFilterSupport(const Version &clientVersion, const Extensions &extensions)
 {
     // HALF_FLOAT
     if (clientVersion >= Version(3, 0))
     {
         return true;
     }
     // HALF_FLOAT_OES
     else
     {
         return extensions.textureHalfFloatLinear;
     }
 }

 static bool SizedHalfFloatRGBTextureAttachmentSupport(const Version &clientVersion,
                                                       const Extensions &extensions)
 {
     // HALF_FLOAT
     if (clientVersion >= Version(3, 0))
     {
         // It is unclear how EXT_color_buffer_half_float applies to ES3.0 and above, however,
         // dEQP GLES3 es3fFboColorbufferTests.cpp verifies that texture attachment of GL_RGB16F
         // is possible, so assume that all GLES implementations support it.
         return extensions.colorBufferHalfFloat;
     }
     // HALF_FLOAT_OES
     else
     {
         return SizedHalfFloatOESTextureAttachmentSupport(clientVersion, extensions);
     }
 }

 static bool SizedHalfFloatRGBRenderbufferSupport(const Version &clientVersion,
                                                  const Extensions &extensions)
 {
     return (clientVersion >= Version(3, 0) || extensions.textureHalfFloat) &&
            extensions.colorBufferHalfFloat;
 }

 static bool SizedHalfFloatRGBATextureAttachmentSupport(const Version &clientVersion,
                                                        const Extensions &extensions)
 {
     // HALF_FLOAT
     if (clientVersion >= Version(3, 0))
     {
         return extensions.colorBufferFloat;
     }
     // HALF_FLOAT_OES
     else
     {
         return SizedHalfFloatOESTextureAttachmentSupport(clientVersion, extensions);
     }
 }

 static bool SizedHalfFloatRGBARenderbufferSupport(const Version &clientVersion,
                                                   const Extensions &extensions)
 {
     return (clientVersion >= Version(3, 0) || extensions.textureHalfFloat) &&
            (extensions.colorBufferFloat || extensions.colorBufferHalfFloat);
 }

 // R32F, RG32F
 static bool SizedFloatRGSupport(const Version &clientVersion, const Extensions &extensions)
 {
     return clientVersion >= Version(3, 0) ||
            (extensions.textureStorage && extensions.textureFloatOES && extensions.textureRG);
 }

 // RGB32F
 static bool SizedFloatRGBSupport(const Version &clientVersion, const Extensions &extensions)
 {
     return clientVersion >= Version(3, 0) ||
            (extensions.textureStorage && extensions.textureFloatOES) ||
            extensions.colorBufferFloatRGB;
 }

 // RGBA32F
 static bool SizedFloatRGBASupport(const Version &clientVersion, const Extensions &extensions)
 {
     return clientVersion >= Version(3, 0) ||
            (extensions.textureStorage && extensions.textureFloatOES) ||
            extensions.colorBufferFloatRGBA;
 }

 static bool SizedFloatRGBARenderableSupport(const Version &clientVersion,
                                             const Extensions &extensions)
 {
     // This logic is the same for both Renderbuffers and TextureAttachment.
     return extensions.colorBufferFloatRGBA ||  // ES2
            extensions.colorBufferFloat;        // ES3
 }

 static bool Float32BlendableSupport(const Version &clientVersion, const Extensions &extensions)
 {
     return extensions.colorBufferFloat && extensions.floatBlend;
 }

 InternalFormat::InternalFormat()
     : internalFormat(GL_NONE),
       sized(false),
       sizedInternalFormat(GL_NONE),
       redBits(0),
       greenBits(0),
       blueBits(0),
       luminanceBits(0),
       alphaBits(0),
       sharedBits(0),
       depthBits(0),
       stencilBits(0),
       pixelBytes(0),
       componentCount(0),
       compressed(false),
       compressedBlockWidth(0),
       compressedBlockHeight(0),
       compressedBlockDepth(0),
       format(GL_NONE),
       type(GL_NONE),
       componentType(GL_NONE),
       colorEncoding(GL_NONE),
       textureSupport(NeverSupported),
       filterSupport(NeverSupported),
       textureAttachmentSupport(NeverSupported),
       renderbufferSupport(NeverSupported)
 {}

 InternalFormat::InternalFormat(const InternalFormat &other) = default;

 bool InternalFormat::isLUMA() const
 {
     return ((redBits + greenBits + blueBits + depthBits + stencilBits) == 0 &&
             (luminanceBits + alphaBits) > 0);
 }

 GLenum InternalFormat::getReadPixelsFormat(const Extensions &extensions) const
 {
     switch (format)
     {
         case GL_BGRA_EXT:
             // BGRA textures may be enabled but calling glReadPixels with BGRA is disallowed without
             // GL_EXT_texture_format_BGRA8888.  Read as RGBA instead.
             if (!extensions.readFormatBGRA)
             {
                 return GL_RGBA;
             }
             return GL_BGRA_EXT;

         default:
             return format;
     }
 }

 GLenum InternalFormat::getReadPixelsType(const Version &version) const
 {
     switch (type)
     {
         case GL_HALF_FLOAT:
         case GL_HALF_FLOAT_OES:
             if (version < Version(3, 0))
             {
                 // The internal format may have a type of GL_HALF_FLOAT but when exposing this type
                 // as the IMPLEMENTATION_READ_TYPE, only HALF_FLOAT_OES is allowed by
                 // OES_texture_half_float.  HALF_FLOAT becomes core in ES3 and is acceptable to use
                 // as an IMPLEMENTATION_READ_TYPE.
                 return GL_HALF_FLOAT_OES;
             }
             return GL_HALF_FLOAT;

         default:
             return type;
     }
 }

 bool InternalFormat::supportSubImage() const
 {
     return !CompressedFormatRequiresWholeImage(internalFormat);
 }

 bool InternalFormat::isRequiredRenderbufferFormat(const Version &version) const
 {
     // GLES 3.0.5 section 4.4.2.2:
     // "Implementations are required to support the same internal formats for renderbuffers as the
     // required formats for textures enumerated in section 3.8.3.1, with the exception of the color
     // formats labelled "texture-only"."
     if (!sized || compressed)
     {
         return false;
     }

     // Luma formats.
     if (isLUMA())
     {
         return false;
     }

     // Depth/stencil formats.
     if (depthBits > 0 || stencilBits > 0)
     {
         // GLES 2.0.25 table 4.5.
         // GLES 3.0.5 section 3.8.3.1.
         // GLES 3.1 table 8.14.

         // Required formats in all versions.
         switch (internalFormat)
         {
             case GL_DEPTH_COMPONENT16:
             case GL_STENCIL_INDEX8:
                 // Note that STENCIL_INDEX8 is not mentioned in GLES 3.0.5 section 3.8.3.1, but it
                 // is in section 4.4.2.2.
                 return true;
             default:
                 break;
         }
         if (version.major < 3)
         {
             return false;
         }
         // Required formats in GLES 3.0 and up.
         switch (internalFormat)
         {
             case GL_DEPTH_COMPONENT32F:
             case GL_DEPTH_COMPONENT24:
             case GL_DEPTH32F_STENCIL8:
             case GL_DEPTH24_STENCIL8:
                 return true;
             default:
                 return false;
         }
     }

     // RGBA formats.
     // GLES 2.0.25 table 4.5.
     // GLES 3.0.5 section 3.8.3.1.
     // GLES 3.1 table 8.13.

     // Required formats in all versions.
     switch (internalFormat)
     {
         case GL_RGBA4:
         case GL_RGB5_A1:
         case GL_RGB565:
             return true;
         default:
             break;
     }
     if (version.major < 3)
     {
         return false;
     }

     if (format == GL_BGRA_EXT)
     {
         return false;
     }

     switch (componentType)
     {
         case GL_SIGNED_NORMALIZED:
         case GL_FLOAT:
             return false;
         case GL_UNSIGNED_INT:
         case GL_INT:
             // Integer RGB formats are not required renderbuffer formats.
             if (alphaBits == 0 && blueBits != 0)
             {
                 return false;
             }
             // All integer R and RG formats are required.
             // Integer RGBA formats including RGB10_A2_UI are required.
             return true;
         case GL_UNSIGNED_NORMALIZED:
             if (internalFormat == GL_SRGB8)
             {
                 return false;
             }
             return true;
         default:
             UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
             return false;
 #endif
     }
 }

 bool InternalFormat::isInt() const
 {
     return componentType == GL_INT || componentType == GL_UNSIGNED_INT;
 }

 bool InternalFormat::isDepthOrStencil() const
 {
     return depthBits != 0 || stencilBits != 0;
 }

 Format::Format(GLenum internalFormat) : Format(GetSizedInternalFormatInfo(internalFormat)) {}

 Format::Format(const InternalFormat &internalFormat) : info(&internalFormat) {}

 Format::Format(GLenum internalFormat, GLenum type)
     : info(&GetInternalFormatInfo(internalFormat, type))
 {}

 Format::Format(const Format &other) = default;
 Format &Format::operator=(const Format &other) = default;

 bool Format::valid() const
 {
     return info->internalFormat != GL_NONE;
 }

 // static
 bool Format::SameSized(const Format &a, const Format &b)
 {
     return a.info->sizedInternalFormat == b.info->sizedInternalFormat;
 }

 static GLenum EquivalentBlitInternalFormat(GLenum internalformat)
 {
     // BlitFramebuffer works if the color channels are identically
     // sized, even if there is a swizzle (for example, blitting from a
     // multisampled RGBA8 renderbuffer to a BGRA8 texture). This could
     // be expanded and/or autogenerated if that is found necessary.
     if (internalformat == GL_BGRA8_EXT)
         return GL_RGBA8;
     return internalformat;
 }

 // static
 bool Format::EquivalentForBlit(const Format &a, const Format &b)
 {
     return (EquivalentBlitInternalFormat(a.info->sizedInternalFormat) ==
             EquivalentBlitInternalFormat(b.info->sizedInternalFormat));
 }

 // static
 Format Format::Invalid()
 {
     static Format invalid(GL_NONE, GL_NONE);
     return invalid;
 }

 std::ostream &operator<<(std::ostream &os, const Format &fmt)
 {
     // TODO(ynovikov): return string representation when available
     return FmtHex(os, fmt.info->sizedInternalFormat);
 }

 bool InternalFormat::operator==(const InternalFormat &other) const
 {
     // We assume all internal formats are unique if they have the same internal format and type
     return internalFormat == other.internalFormat && type == other.type;
 }

 bool InternalFormat::operator!=(const InternalFormat &other) const
 {
     return !(*this == other);
 }

 void InsertFormatInfo(InternalFormatInfoMap *map, const InternalFormat &formatInfo)
 {
     ASSERT(!formatInfo.sized || (*map).count(formatInfo.internalFormat) == 0);
     ASSERT((*map)[formatInfo.internalFormat].count(formatInfo.type) == 0);
     (*map)[formatInfo.internalFormat][formatInfo.type] = formatInfo;
 }

 void AddRGBAFormat(InternalFormatInfoMap *map,
                    GLenum internalFormat,
                    bool sized,
                    GLuint red,
                    GLuint green,
                    GLuint blue,
                    GLuint alpha,
                    GLuint shared,
                    GLenum format,
                    GLenum type,
                    GLenum componentType,
                    bool srgb,
                    InternalFormat::SupportCheckFunction textureSupport,
                    InternalFormat::SupportCheckFunction filterSupport,
                    InternalFormat::SupportCheckFunction textureAttachmentSupport,
                    InternalFormat::SupportCheckFunction renderbufferSupport,
                    InternalFormat::SupportCheckFunction blendSupport)
 {
     InternalFormat formatInfo;
     formatInfo.internalFormat = internalFormat;
     formatInfo.sized          = sized;
     formatInfo.sizedInternalFormat =
         sized ? internalFormat : GetSizedFormatInternal(internalFormat, type);
     formatInfo.redBits    = red;
     formatInfo.greenBits  = green;
     formatInfo.blueBits   = blue;
     formatInfo.alphaBits  = alpha;
     formatInfo.sharedBits = shared;
     formatInfo.pixelBytes = (red + green + blue + alpha + shared) / 8;
     formatInfo.componentCount =
         ((red > 0) ? 1 : 0) + ((green > 0) ? 1 : 0) + ((blue > 0) ? 1 : 0) + ((alpha > 0) ? 1 : 0);
     formatInfo.format                   = format;
     formatInfo.type                     = type;
     formatInfo.componentType            = componentType;
     formatInfo.colorEncoding            = (srgb ? GL_SRGB : GL_LINEAR);
     formatInfo.textureSupport           = textureSupport;
     formatInfo.filterSupport            = filterSupport;
     formatInfo.textureAttachmentSupport = textureAttachmentSupport;
     formatInfo.renderbufferSupport      = renderbufferSupport;
     formatInfo.blendSupport             = blendSupport;

     InsertFormatInfo(map, formatInfo);
 }

 static void AddLUMAFormat(InternalFormatInfoMap *map,
                           GLenum internalFormat,
                           bool sized,
                           GLuint luminance,
                           GLuint alpha,
                           GLenum format,
                           GLenum type,
                           GLenum componentType,
                           InternalFormat::SupportCheckFunction textureSupport,
                           InternalFormat::SupportCheckFunction filterSupport,
                           InternalFormat::SupportCheckFunction textureAttachmentSupport,
                           InternalFormat::SupportCheckFunction renderbufferSupport,
                           InternalFormat::SupportCheckFunction blendSupport)
 {
     InternalFormat formatInfo;
     formatInfo.internalFormat = internalFormat;
     formatInfo.sized          = sized;
     formatInfo.sizedInternalFormat =
         sized ? internalFormat : GetSizedFormatInternal(internalFormat, type);
     formatInfo.luminanceBits            = luminance;
     formatInfo.alphaBits                = alpha;
     formatInfo.pixelBytes               = (luminance + alpha) / 8;
     formatInfo.componentCount           = ((luminance > 0) ? 1 : 0) + ((alpha > 0) ? 1 : 0);
     formatInfo.format                   = format;
     formatInfo.type                     = type;
     formatInfo.componentType            = componentType;
     formatInfo.colorEncoding            = GL_LINEAR;
     formatInfo.textureSupport           = textureSupport;
     formatInfo.filterSupport            = filterSupport;
     formatInfo.textureAttachmentSupport = textureAttachmentSupport;
     formatInfo.renderbufferSupport      = renderbufferSupport;
     formatInfo.blendSupport             = blendSupport;

     InsertFormatInfo(map, formatInfo);
 }

 void AddDepthStencilFormat(InternalFormatInfoMap *map,
                            GLenum internalFormat,
                            bool sized,
                            GLuint depthBits,
                            GLuint stencilBits,
                            GLuint unusedBits,
                            GLenum format,
                            GLenum type,
                            GLenum componentType,
                            InternalFormat::SupportCheckFunction textureSupport,
                            InternalFormat::SupportCheckFunction filterSupport,
                            InternalFormat::SupportCheckFunction textureAttachmentSupport,
                            InternalFormat::SupportCheckFunction renderbufferSupport,
                            InternalFormat::SupportCheckFunction blendSupport)
 {
     InternalFormat formatInfo;
     formatInfo.internalFormat = internalFormat;
     formatInfo.sized          = sized;
     formatInfo.sizedInternalFormat =
         sized ? internalFormat : GetSizedFormatInternal(internalFormat, type);
     formatInfo.depthBits                = depthBits;
     formatInfo.stencilBits              = stencilBits;
     formatInfo.pixelBytes               = (depthBits + stencilBits + unusedBits) / 8;
     formatInfo.componentCount           = ((depthBits > 0) ? 1 : 0) + ((stencilBits > 0) ? 1 : 0);
     formatInfo.format                   = format;
     formatInfo.type                     = type;
     formatInfo.componentType            = componentType;
     formatInfo.colorEncoding            = GL_LINEAR;
     formatInfo.textureSupport           = textureSupport;
     formatInfo.filterSupport            = filterSupport;
     formatInfo.textureAttachmentSupport = textureAttachmentSupport;
     formatInfo.renderbufferSupport      = renderbufferSupport;
     formatInfo.blendSupport             = blendSupport;

     InsertFormatInfo(map, formatInfo);
 }

 void AddCompressedFormat(InternalFormatInfoMap *map,
                          GLenum internalFormat,
                          GLuint compressedBlockWidth,
                          GLuint compressedBlockHeight,
                          GLuint compressedBlockDepth,
                          GLuint compressedBlockSize,
                          GLuint componentCount,
                          bool srgb,
                          InternalFormat::SupportCheckFunction textureSupport,
                          InternalFormat::SupportCheckFunction filterSupport,
                          InternalFormat::SupportCheckFunction textureAttachmentSupport,
                          InternalFormat::SupportCheckFunction renderbufferSupport,
                          InternalFormat::SupportCheckFunction blendSupport)
 {
     InternalFormat formatInfo;
     formatInfo.internalFormat           = internalFormat;
     formatInfo.sized                    = true;
     formatInfo.sizedInternalFormat      = internalFormat;
     formatInfo.compressedBlockWidth     = compressedBlockWidth;
     formatInfo.compressedBlockHeight    = compressedBlockHeight;
     formatInfo.compressedBlockDepth     = compressedBlockDepth;
     formatInfo.pixelBytes               = compressedBlockSize / 8;
     formatInfo.componentCount           = componentCount;
     formatInfo.format                   = internalFormat;
     formatInfo.type                     = GL_UNSIGNED_BYTE;
     formatInfo.componentType            = GL_UNSIGNED_NORMALIZED;
     formatInfo.colorEncoding            = (srgb ? GL_SRGB : GL_LINEAR);
     formatInfo.compressed               = true;
     formatInfo.textureSupport           = textureSupport;
     formatInfo.filterSupport            = filterSupport;
     formatInfo.textureAttachmentSupport = textureAttachmentSupport;
     formatInfo.renderbufferSupport      = renderbufferSupport;
     formatInfo.blendSupport             = blendSupport;

     InsertFormatInfo(map, formatInfo);
 }

 // Notes:
 // 1. "Texture supported" includes all the means by which texture can be created, however,
 //    GL_EXT_texture_storage in ES2 is a special case, when only glTexStorage* is allowed.
 //    The assumption is that ES2 validation will not check textureSupport for sized formats.
 //
 // 2. Sized half float types are a combination of GL_HALF_FLOAT and GL_HALF_FLOAT_OES support,
 //    due to a limitation that only one type for sized formats is allowed.
 //
 // TODO(ynovikov): http://anglebug.com/2846 Verify support fields of BGRA, depth, stencil
 // and compressed formats. Perform texturable check as part of filterable and attachment checks.
 static InternalFormatInfoMap BuildInternalFormatInfoMap()
 {
     InternalFormatInfoMap map;

     // From ES 3.0.1 spec, table 3.12
     map[GL_NONE][GL_NONE] = InternalFormat();

     // clang-format off

     //                 | Internal format     |sized| R | G | B | A |S | Format         | Type                             | Component type        | SRGB | Texture supported                                | Filterable     | Texture attachment                               | Renderbuffer                                   | Blend
     AddRGBAFormat(&map, GL_R8,                true,  8,  0,  0,  0, 0, GL_RED,          GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, SizedRGSupport,                                    AlwaysSupported, SizedRGSupport,                                    RequireESOrExt<3, 0, &Extensions::textureRG>,    RequireESOrExt<3, 0, &Extensions::textureRG>);
     AddRGBAFormat(&map, GL_R8_SNORM,          true,  8,  0,  0,  0, 0, GL_RED,          GL_BYTE,                           GL_SIGNED_NORMALIZED,   false, RequireES<3, 0>,                                   AlwaysSupported, NeverSupported,                                    NeverSupported,                                  NeverSupported);
     AddRGBAFormat(&map, GL_RG8,               true,  8,  8,  0,  0, 0, GL_RG,           GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, SizedRGSupport,                                    AlwaysSupported, SizedRGSupport,                                    RequireESOrExt<3, 0, &Extensions::textureRG>,    RequireESOrExt<3, 0, &Extensions::textureRG>);
     AddRGBAFormat(&map, GL_RG8_SNORM,         true,  8,  8,  0,  0, 0, GL_RG,           GL_BYTE,                           GL_SIGNED_NORMALIZED,   false, RequireES<3, 0>,                                   AlwaysSupported, NeverSupported,                                    NeverSupported,                                  NeverSupported);
     AddRGBAFormat(&map, GL_RGB8,              true,  8,  8,  8,  0, 0, GL_RGB,          GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, 0, &Extensions::textureStorage>, AlwaysSupported, RequireESOrExt<3, 0, &Extensions::textureStorage>, RequireESOrExt<3, 0, &Extensions::rgb8rgba8OES>, RequireESOrExt<3, 0, &Extensions::rgb8rgba8OES>);
     AddRGBAFormat(&map, GL_RGB8_SNORM,        true,  8,  8,  8,  0, 0, GL_RGB,          GL_BYTE,                           GL_SIGNED_NORMALIZED,   false, RequireES<3, 0>,                                   AlwaysSupported, NeverSupported,                                    NeverSupported,                                  NeverSupported);
     AddRGBAFormat(&map, GL_RGB565,            true,  5,  6,  5,  0, 0, GL_RGB,          GL_UNSIGNED_SHORT_5_6_5,           GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, 0, &Extensions::textureStorage>, AlwaysSupported, RequireESOrExt<3, 0, &Extensions::textureStorage>, RequireES<2, 0>,                                 RequireES<2, 0>);
     AddRGBAFormat(&map, GL_RGBA4,             true,  4,  4,  4,  4, 0, GL_RGBA,         GL_UNSIGNED_SHORT_4_4_4_4,         GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, 0, &Extensions::textureStorage>, AlwaysSupported, RequireESOrExt<3, 0, &Extensions::textureStorage>, RequireES<2, 0>,                                 RequireES<2, 0>);
     AddRGBAFormat(&map, GL_RGB5_A1,           true,  5,  5,  5,  1, 0, GL_RGBA,         GL_UNSIGNED_SHORT_5_5_5_1,         GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, 0, &Extensions::textureStorage>, AlwaysSupported, RequireESOrExt<3, 0, &Extensions::textureStorage>, RequireES<2, 0>,                                 RequireES<2, 0>);
     AddRGBAFormat(&map, GL_RGBA8,             true,  8,  8,  8,  8, 0, GL_RGBA,         GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, RequireESOrExt<3, 0, &Extensions::textureStorage>, AlwaysSupported, RequireESOrExt<3, 0, &Extensions::textureStorage>, RequireESOrExt<3, 0, &Extensions::rgb8rgba8OES>, RequireESOrExt<3, 0, &Extensions::rgb8rgba8OES>);
     AddRGBAFormat(&map, GL_RGBA8_SNORM,       true,  8,  8,  8,  8, 0, GL_RGBA,         GL_BYTE,                           GL_SIGNED_NORMALIZED,   false, RequireES<3, 0>,                                   AlwaysSupported, NeverSupported,                                    NeverSupported,                                  NeverSupported);
     AddRGBAFormat(&map, GL_RGB10_A2,          true, 10, 10, 10,  2, 0, GL_RGBA,         GL_UNSIGNED_INT_2_10_10_10_REV,    GL_UNSIGNED_NORMALIZED, false, RequireES<3, 0>,                                   AlwaysSupported, RequireES<3, 0>,                                   RequireES<3, 0>,                                 RequireES<3, 0>);
     AddRGBAFormat(&map, GL_RGB10_A2UI,        true, 10, 10, 10,  2, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV,    GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_SRGB8,             true,  8,  8,  8,  0, 0, GL_RGB,          GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, true,  RequireES<3, 0>,                                   AlwaysSupported, NeverSupported,                                    NeverSupported,                                  NeverSupported);
     AddRGBAFormat(&map, GL_SRGB8_ALPHA8,      true,  8,  8,  8,  8, 0, GL_RGBA,         GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, true,  RequireESOrExt<3, 0, &Extensions::sRGB>,           AlwaysSupported, RequireES<3, 0>,                                   RequireESOrExt<3, 0, &Extensions::sRGB>,         RequireESOrExt<3, 0, &Extensions::sRGB>);
     AddRGBAFormat(&map, GL_R11F_G11F_B10F,    true, 11, 11, 10,  0, 0, GL_RGB,          GL_UNSIGNED_INT_10F_11F_11F_REV,   GL_FLOAT,               false, RequireES<3, 0>,                                   AlwaysSupported, RequireExt<&Extensions::colorBufferFloat>,         RequireExt<&Extensions::colorBufferFloat>,       RequireExt<&Extensions::colorBufferFloat>);
     AddRGBAFormat(&map, GL_RGB9_E5,           true,  9,  9,  9,  0, 5, GL_RGB,          GL_UNSIGNED_INT_5_9_9_9_REV,       GL_FLOAT,               false, RequireES<3, 0>,                                   AlwaysSupported, NeverSupported,                                    NeverSupported,                                  NeverSupported);
     AddRGBAFormat(&map, GL_R8I,               true,  8,  0,  0,  0, 0, GL_RED_INTEGER,  GL_BYTE,                           GL_INT,                 false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_R8UI,              true,  8,  0,  0,  0, 0, GL_RED_INTEGER,  GL_UNSIGNED_BYTE,                  GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_R16I,              true, 16,  0,  0,  0, 0, GL_RED_INTEGER,  GL_SHORT,                          GL_INT,                 false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_R16UI,             true, 16,  0,  0,  0, 0, GL_RED_INTEGER,  GL_UNSIGNED_SHORT,                 GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_R32I,              true, 32,  0,  0,  0, 0, GL_RED_INTEGER,  GL_INT,                            GL_INT,                 false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_R32UI,             true, 32,  0,  0,  0, 0, GL_RED_INTEGER,  GL_UNSIGNED_INT,                   GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_RG8I,              true,  8,  8,  0,  0, 0, GL_RG_INTEGER,   GL_BYTE,                           GL_INT,                 false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_RG8UI,             true,  8,  8,  0,  0, 0, GL_RG_INTEGER,   GL_UNSIGNED_BYTE,                  GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_RG16I,             true, 16, 16,  0,  0, 0, GL_RG_INTEGER,   GL_SHORT,                          GL_INT,                 false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_RG16UI,            true, 16, 16,  0,  0, 0, GL_RG_INTEGER,   GL_UNSIGNED_SHORT,                 GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_RG32I,             true, 32, 32,  0,  0, 0, GL_RG_INTEGER,   GL_INT,                            GL_INT,                 false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_RG32UI,            true, 32, 32,  0,  0, 0, GL_RG_INTEGER,   GL_UNSIGNED_INT,                   GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_RGB8I,             true,  8,  8,  8,  0, 0, GL_RGB_INTEGER,  GL_BYTE,                           GL_INT,                 false, RequireES<3, 0>,                                   NeverSupported,  NeverSupported,                                    NeverSupported,                                  NeverSupported);
     AddRGBAFormat(&map, GL_RGB8UI,            true,  8,  8,  8,  0, 0, GL_RGB_INTEGER,  GL_UNSIGNED_BYTE,                  GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  NeverSupported,                                    NeverSupported,                                  NeverSupported);
     AddRGBAFormat(&map, GL_RGB16I,            true, 16, 16, 16,  0, 0, GL_RGB_INTEGER,  GL_SHORT,                          GL_INT,                 false, RequireES<3, 0>,                                   NeverSupported,  NeverSupported,                                    NeverSupported,                                  NeverSupported);
     AddRGBAFormat(&map, GL_RGB16UI,           true, 16, 16, 16,  0, 0, GL_RGB_INTEGER,  GL_UNSIGNED_SHORT,                 GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  NeverSupported,                                    NeverSupported,                                  NeverSupported);
     AddRGBAFormat(&map, GL_RGB32I,            true, 32, 32, 32,  0, 0, GL_RGB_INTEGER,  GL_INT,                            GL_INT,                 false, RequireES<3, 0>,                                   NeverSupported,  NeverSupported,                                    NeverSupported,                                  NeverSupported);
     AddRGBAFormat(&map, GL_RGB32UI,           true, 32, 32, 32,  0, 0, GL_RGB_INTEGER,  GL_UNSIGNED_INT,                   GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  NeverSupported,                                    NeverSupported,                                  NeverSupported);
     AddRGBAFormat(&map, GL_RGBA8I,            true,  8,  8,  8,  8, 0, GL_RGBA_INTEGER, GL_BYTE,                           GL_INT,                 false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_RGBA8UI,           true,  8,  8,  8,  8, 0, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE,                  GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_RGBA16I,           true, 16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_SHORT,                          GL_INT,                 false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_RGBA16UI,          true, 16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT,                 GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_RGBA32I,           true, 32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_INT,                            GL_INT,                 false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);
     AddRGBAFormat(&map, GL_RGBA32UI,          true, 32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT,                   GL_UNSIGNED_INT,        false, RequireES<3, 0>,                                   NeverSupported,  RequireES<3, 0>,                                   RequireES<3, 0>,                                 NeverSupported);

     AddRGBAFormat(&map, GL_BGRA8_EXT,         true,  8,  8,  8,  8, 0, GL_BGRA_EXT,     GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormatBGRA8888>,    AlwaysSupported, RequireExt<&Extensions::textureFormatBGRA8888>,    RequireExt<&Extensions::textureFormatBGRA8888>, RequireExt<&Extensions::textureFormatBGRA8888>);
     AddRGBAFormat(&map, GL_BGRA4_ANGLEX,      true,  4,  4,  4,  4, 0, GL_BGRA_EXT,     GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormatBGRA8888>,    AlwaysSupported, RequireExt<&Extensions::textureFormatBGRA8888>,    RequireExt<&Extensions::textureFormatBGRA8888>, RequireExt<&Extensions::textureFormatBGRA8888>);
     AddRGBAFormat(&map, GL_BGR5_A1_ANGLEX,    true,  5,  5,  5,  1, 0, GL_BGRA_EXT,     GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormatBGRA8888>,    AlwaysSupported, RequireExt<&Extensions::textureFormatBGRA8888>,    RequireExt<&Extensions::textureFormatBGRA8888>, RequireExt<&Extensions::textureFormatBGRA8888>);

     // Special format that is used for D3D textures that are used within ANGLE via the
     // EGL_ANGLE_d3d_texture_client_buffer extension. We don't allow uploading texture images with
     // this format, but textures in this format can be created from D3D textures, and filtering them
     // and rendering to them is allowed.
     AddRGBAFormat(&map, GL_BGRA8_SRGB_ANGLEX, true,  8,  8,  8,  8, 0, GL_BGRA_EXT,     GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, true,  NeverSupported,                                    AlwaysSupported, AlwaysSupported,                                   AlwaysSupported,                               AlwaysSupported);

     // Special format which is not really supported, so always false for all supports.
     AddRGBAFormat(&map, GL_BGRX8_ANGLEX,      true,  8,  8,  8,  0, 0, GL_BGRA_EXT,     GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, false, NeverSupported,                                    NeverSupported,  NeverSupported,                                    NeverSupported,                                NeverSupported);
     AddRGBAFormat(&map, GL_BGR565_ANGLEX,     true,  5,  6,  5,  1, 0, GL_BGRA_EXT,     GL_UNSIGNED_SHORT_5_6_5,           GL_UNSIGNED_NORMALIZED, false, NeverSupported,                                    NeverSupported,  NeverSupported,                                    NeverSupported,                                NeverSupported);

     // Floating point formats
     //                 | Internal format |sized| R | G | B | A |S | Format | Type             | Component type | SRGB | Texture supported         | Filterable                                    | Texture attachment                          | Renderbuffer                            | Blend
     // It's not possible to have two entries per sized format.
     // E.g. for GL_RG16F, one with GL_HALF_FLOAT type and the other with GL_HALF_FLOAT_OES type.
     // So, GL_HALF_FLOAT type formats conditions are merged with GL_HALF_FLOAT_OES type conditions.
     AddRGBAFormat(&map, GL_R16F,          true, 16,  0,  0,  0, 0, GL_RED,  GL_HALF_FLOAT,     GL_FLOAT,        false, SizedHalfFloatRGSupport,    SizedHalfFloatFilterSupport,                    SizedHalfFloatRGTextureAttachmentSupport,     SizedHalfFloatRGRenderbufferSupport,       SizedHalfFloatRGRenderbufferSupport);
     AddRGBAFormat(&map, GL_RG16F,         true, 16, 16,  0,  0, 0, GL_RG,   GL_HALF_FLOAT,     GL_FLOAT,        false, SizedHalfFloatRGSupport,    SizedHalfFloatFilterSupport,                    SizedHalfFloatRGTextureAttachmentSupport,     SizedHalfFloatRGRenderbufferSupport,       SizedHalfFloatRGRenderbufferSupport);
     AddRGBAFormat(&map, GL_RGB16F,        true, 16, 16, 16,  0, 0, GL_RGB,  GL_HALF_FLOAT,     GL_FLOAT,        false, SizedHalfFloatSupport,      SizedHalfFloatFilterSupport,                    SizedHalfFloatRGBTextureAttachmentSupport,    SizedHalfFloatRGBRenderbufferSupport,      SizedHalfFloatRGBRenderbufferSupport);
     AddRGBAFormat(&map, GL_RGBA16F,       true, 16, 16, 16, 16, 0, GL_RGBA, GL_HALF_FLOAT,     GL_FLOAT,        false, SizedHalfFloatSupport,      SizedHalfFloatFilterSupport,                    SizedHalfFloatRGBATextureAttachmentSupport,   SizedHalfFloatRGBARenderbufferSupport,     SizedHalfFloatRGBARenderbufferSupport);
     AddRGBAFormat(&map, GL_R32F,          true, 32,  0,  0,  0, 0, GL_RED,  GL_FLOAT,          GL_FLOAT,        false, SizedFloatRGSupport,        RequireExt<&Extensions::textureFloatLinearOES>, RequireExt<&Extensions::colorBufferFloat>,    RequireExt<&Extensions::colorBufferFloat>, Float32BlendableSupport);
     AddRGBAFormat(&map, GL_RG32F,         true, 32, 32,  0,  0, 0, GL_RG,   GL_FLOAT,          GL_FLOAT,        false, SizedFloatRGSupport,        RequireExt<&Extensions::textureFloatLinearOES>, RequireExt<&Extensions::colorBufferFloat>,    RequireExt<&Extensions::colorBufferFloat>, Float32BlendableSupport);
     AddRGBAFormat(&map, GL_RGB32F,        true, 32, 32, 32,  0, 0, GL_RGB,  GL_FLOAT,          GL_FLOAT,        false, SizedFloatRGBSupport,       RequireExt<&Extensions::textureFloatLinearOES>, RequireExt<&Extensions::colorBufferFloatRGB>, NeverSupported,                            NeverSupported);
     AddRGBAFormat(&map, GL_RGBA32F,       true, 32, 32, 32, 32, 0, GL_RGBA, GL_FLOAT,          GL_FLOAT,        false, SizedFloatRGBASupport,      RequireExt<&Extensions::textureFloatLinearOES>, SizedFloatRGBARenderableSupport,              SizedFloatRGBARenderableSupport,           Float32BlendableSupport);

     // ANGLE Depth stencil formats
     //                         | Internal format         |sized| D |S | X | Format            | Type                             | Component type        | Texture supported                                                            | Filterable                                                                             | Texture attachment                                                                           | Renderbuffer                                                                                              | Blend
     AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT16,     true, 16, 0,  0, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT,                 GL_UNSIGNED_NORMALIZED, RequireES<1, 0>,                                                               RequireESOrExtOrExt<3, 0, &Extensions::depthTextureANGLE, &Extensions::depthTextureOES>, RequireES<1, 0>,                                                                               RequireES<1, 0>,                                                                                             RequireES<1, 0>);
     AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT24,     true, 24, 0,  0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT,                   GL_UNSIGNED_NORMALIZED, RequireES<3, 0>,                                                               RequireESOrExt<3, 0, &Extensions::depthTextureANGLE>,                                    RequireES<3, 0>,                                                                               RequireESOrExt<3, 0, &Extensions::depth24OES>,                                                               RequireESOrExt<3, 0, &Extensions::depth24OES>);
     AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT32F,    true, 32, 0,  0, GL_DEPTH_COMPONENT, GL_FLOAT,                          GL_FLOAT,               RequireES<3, 0>,                                                               RequireESOrExt<3, 0, &Extensions::depthTextureANGLE>,                                    RequireES<3, 0>,                                                                               RequireES<3, 0>,                                                                                             RequireES<3, 0>);
     AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT32_OES, true, 32, 0,  0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT,                   GL_UNSIGNED_NORMALIZED, RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>, AlwaysSupported,                                                                         RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>,                 RequireExtOrExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES, &Extensions::depth32OES>, RequireExtOrExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES, &Extensions::depth32OES>);
     AddDepthStencilFormat(&map, GL_DEPTH24_STENCIL8,      true, 24, 8,  0, GL_DEPTH_STENCIL,   GL_UNSIGNED_INT_24_8,              GL_UNSIGNED_NORMALIZED, RequireESOrExt<3, 0, &Extensions::depthTextureANGLE>,                          AlwaysSupported,                                                                         RequireESOrExtOrExt<3, 0, &Extensions::depthTextureANGLE, &Extensions::packedDepthStencilOES>, RequireESOrExtOrExt<3, 0, &Extensions::depthTextureANGLE, &Extensions::packedDepthStencilOES>,               RequireESOrExtOrExt<3, 0, &Extensions::depthTextureANGLE, &Extensions::packedDepthStencilOES>);
     AddDepthStencilFormat(&map, GL_DEPTH32F_STENCIL8,     true, 32, 8, 24, GL_DEPTH_STENCIL,   GL_FLOAT_32_UNSIGNED_INT_24_8_REV, GL_FLOAT,               RequireESOrExt<3, 0, &Extensions::depthBufferFloat2NV>,                        AlwaysSupported,                                                                         RequireESOrExt<3, 0, &Extensions::depthBufferFloat2NV>,                                        RequireESOrExt<3, 0, &Extensions::depthBufferFloat2NV>,                                                      RequireESOrExt<3, 0, &Extensions::depthBufferFloat2NV>);
     // STENCIL_INDEX8 is special-cased, see around the bottom of the list.

     // Luminance alpha formats
     //                | Internal format           |sized| L | A | Format            | Type             | Component type        | Texture supported                                                           | Filterable                                     | Texture attachment | Renderbuffer | Blend
     AddLUMAFormat(&map, GL_ALPHA8_EXT,             true,  0,  8, GL_ALPHA,           GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, RequireExt<&Extensions::textureStorage>,                                      AlwaysSupported,                                 NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_LUMINANCE8_EXT,         true,  8,  0, GL_LUMINANCE,       GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, RequireExt<&Extensions::textureStorage>,                                      AlwaysSupported,                                 NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_LUMINANCE8_ALPHA8_EXT,  true,  8,  8, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, RequireExt<&Extensions::textureStorage>,                                      AlwaysSupported,                                 NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_ALPHA16F_EXT,           true,  0, 16, GL_ALPHA,           GL_HALF_FLOAT_OES, GL_FLOAT,               RequireExtAndExt<&Extensions::textureStorage, &Extensions::textureHalfFloat>, RequireExt<&Extensions::textureHalfFloatLinear>, NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_LUMINANCE16F_EXT,       true, 16,  0, GL_LUMINANCE,       GL_HALF_FLOAT_OES, GL_FLOAT,               RequireExtAndExt<&Extensions::textureStorage, &Extensions::textureHalfFloat>, RequireExt<&Extensions::textureHalfFloatLinear>, NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_LUMINANCE_ALPHA16F_EXT, true, 16, 16, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES, GL_FLOAT,               RequireExtAndExt<&Extensions::textureStorage, &Extensions::textureHalfFloat>, RequireExt<&Extensions::textureHalfFloatLinear>, NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_ALPHA32F_EXT,           true,  0, 32, GL_ALPHA,           GL_FLOAT,          GL_FLOAT,               RequireExtAndExt<&Extensions::textureStorage, &Extensions::textureFloatOES>,  RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_LUMINANCE32F_EXT,       true, 32,  0, GL_LUMINANCE,       GL_FLOAT,          GL_FLOAT,               RequireExtAndExt<&Extensions::textureStorage, &Extensions::textureFloatOES>,  RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_LUMINANCE_ALPHA32F_EXT, true, 32, 32, GL_LUMINANCE_ALPHA, GL_FLOAT,          GL_FLOAT,               RequireExtAndExt<&Extensions::textureStorage, &Extensions::textureFloatOES>,  RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,      NeverSupported, NeverSupported);

     // Compressed formats, From ES 3.0.1 spec, table 3.16
     //                       | Internal format                             |W |H |D | BS |CC| SRGB | Texture supported                                                                                                         | Filterable     | Texture attachment | Renderbuffer  | Blend
     AddCompressedFormat(&map, GL_COMPRESSED_R11_EAC,                        4, 4, 1,  64, 1, false, RequireESOrExtOrExt<3, 0, &Extensions::compressedTextureETC, &Extensions::compressedEACR11UnsignedTextureOES>,              AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SIGNED_R11_EAC,                 4, 4, 1,  64, 1, false, RequireESOrExtOrExt<3, 0, &Extensions::compressedTextureETC, &Extensions::compressedEACR11SignedTextureOES>,                AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RG11_EAC,                       4, 4, 1, 128, 2, false, RequireESOrExtOrExt<3, 0, &Extensions::compressedTextureETC, &Extensions::compressedEACRG11UnsignedTextureOES>,             AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SIGNED_RG11_EAC,                4, 4, 1, 128, 2, false, RequireESOrExtOrExt<3, 0, &Extensions::compressedTextureETC, &Extensions::compressedEACRG11SignedTextureOES>,               AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGB8_ETC2,                      4, 4, 1,  64, 3, false, RequireESOrExtOrExt<3, 0, &Extensions::compressedTextureETC, &Extensions::compressedETC2RGB8TextureOES>,                    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ETC2,                     4, 4, 1,  64, 3, true,  RequireESOrExtOrExt<3, 0, &Extensions::compressedTextureETC, &Extensions::compressedETC2sRGB8TextureOES>,                   AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2,  4, 4, 1,  64, 3, false, RequireESOrExtOrExt<3, 0, &Extensions::compressedTextureETC, &Extensions::compressedETC2PunchthroughARGB8TextureOES>,       AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2, 4, 4, 1,  64, 3, true,  RequireESOrExtOrExt<3, 0, &Extensions::compressedTextureETC, &Extensions::compressedETC2PunchthroughAsRGB8AlphaTextureOES>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA8_ETC2_EAC,                 4, 4, 1, 128, 4, false, RequireESOrExtOrExt<3, 0, &Extensions::compressedTextureETC, &Extensions::compressedETC2RGBA8TextureOES>,                   AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC,          4, 4, 1, 128, 4, true,  RequireESOrExtOrExt<3, 0, &Extensions::compressedTextureETC, &Extensions::compressedETC2sRGB8Alpha8TextureOES>,             AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     // From GL_EXT_texture_compression_dxt1
     //                       | Internal format                   |W |H |D | BS |CC| SRGB | Texture supported                                    | Filterable     | Texture attachment | Renderbuffer  | Blend
     AddCompressedFormat(&map, GL_COMPRESSED_RGB_S3TC_DXT1_EXT,    4, 4, 1,  64, 3, false, RequireExt<&Extensions::textureCompressionDXT1>,       AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT,   4, 4, 1,  64, 4, false, RequireExt<&Extensions::textureCompressionDXT1>,       AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     // From GL_ANGLE_texture_compression_dxt3
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE, 4, 4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionDXT3>,       AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     // From GL_ANGLE_texture_compression_dxt5
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE, 4, 4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionDXT5>,       AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     // From GL_OES_compressed_ETC1_RGB8_texture
     AddCompressedFormat(&map, GL_ETC1_RGB8_OES,                   4, 4, 1,  64, 3, false, RequireExt<&Extensions::compressedETC1RGB8TextureOES>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     // From GL_EXT_texture_compression_s3tc_srgb
     //                       | Internal format                       |W |H |D | BS |CC|SRGB | Texture supported                                 | Filterable     | Texture attachment | Renderbuffer  | Blend
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB_S3TC_DXT1_EXT,       4, 4, 1,  64, 3, true, RequireExt<&Extensions::textureCompressionS3TCsRGB>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT, 4, 4, 1,  64, 4, true, RequireExt<&Extensions::textureCompressionS3TCsRGB>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT, 4, 4, 1, 128, 4, true, RequireExt<&Extensions::textureCompressionS3TCsRGB>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT, 4, 4, 1, 128, 4, true, RequireExt<&Extensions::textureCompressionS3TCsRGB>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     // From GL_KHR_texture_compression_astc_ldr and KHR_texture_compression_astc_hdr and GL_OES_texture_compression_astc
     //                       | Internal format                          | W | H |D | BS |CC| SRGB | Texture supported                                    | Filterable     | Texture attachment | Renderbuffer  | Blend
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_4x4_KHR,            4,  4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_5x4_KHR,            5,  4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_5x5_KHR,            5,  5, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_6x5_KHR,            6,  5, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_6x6_KHR,            6,  6, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_8x5_KHR,            8,  5, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_8x6_KHR,            8,  6, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_8x8_KHR,            8,  8, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_10x5_KHR,          10,  5, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_10x6_KHR,          10,  6, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_10x8_KHR,          10,  8, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_10x10_KHR,         10, 10, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_12x10_KHR,         12, 10, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_12x12_KHR,         12, 12, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR,    4,  4, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR,    5,  4, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR,    5,  5, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR,    6,  5, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR,    6,  6, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR,    8,  5, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR,    8,  6, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR,    8,  8, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR,  10,  5, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR,  10,  6, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR,  10,  8, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR, 10, 10, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR, 12, 10, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR, 12, 12, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCLDRKHR>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_3x3x3_OES,          3,  3, 3, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_4x3x3_OES,          4,  3, 3, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_4x4x3_OES,          4,  4, 3, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_4x4x4_OES,          4,  4, 4, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_5x4x4_OES,          5,  4, 4, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_5x5x4_OES,          5,  5, 4, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_5x5x5_OES,          5,  5, 5, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_6x5x5_OES,          6,  5, 5, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_6x6x5_OES,          6,  6, 5, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_ASTC_6x6x6_OES,          6,  6, 6, 128, 4, false, RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES,  3,  3, 3, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES,  4,  3, 3, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES,  4,  4, 3, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES,  4,  4, 4, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES,  5,  4, 4, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES,  5,  5, 4, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES,  5,  5, 5, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES,  6,  5, 5, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES,  6,  6, 5, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES,  6,  6, 6, 128, 4, true,  RequireExt<&Extensions::textureCompressionASTCOES>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     // From EXT_texture_compression_rgtc
     //                       | Internal format                        | W | H |D | BS |CC| SRGB | Texture supported                              | Filterable     | Texture attachment | Renderbuffer  | Blend
     AddCompressedFormat(&map, GL_COMPRESSED_RED_RGTC1_EXT,              4,  4, 1,  64, 1, false, RequireExt<&Extensions::textureCompressionRGTC>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SIGNED_RED_RGTC1_EXT,       4,  4, 1,  64, 1, false, RequireExt<&Extensions::textureCompressionRGTC>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RED_GREEN_RGTC2_EXT,        4,  4, 1, 128, 2, false, RequireExt<&Extensions::textureCompressionRGTC>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT, 4,  4, 1, 128, 2, false, RequireExt<&Extensions::textureCompressionRGTC>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     // From EXT_texture_compression_bptc
     //                       | Internal format                         | W | H |D | BS |CC| SRGB | Texture supported                              | Filterable     | Texture attachment | Renderbuffer  | Blend
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_BPTC_UNORM_EXT,         4,  4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionBPTC>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_EXT,   4,  4, 1, 128, 4, true,  RequireExt<&Extensions::textureCompressionBPTC>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_EXT,   4,  4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionBPTC>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_EXT, 4,  4, 1, 128, 4, false, RequireExt<&Extensions::textureCompressionBPTC>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     // From GL_IMG_texture_compression_pvrtc
     //                       | Internal format                       | W | H | D | BS |CC| SRGB | Texture supported                                 | Filterable     | Texture attachment | Renderbuffer  | Blend
     AddCompressedFormat(&map, GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG,      1,  1,  1,   1, 3, false, RequireExt<&Extensions::compressedTexturePVRTC>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG,      1,  1,  1,   1, 3, false, RequireExt<&Extensions::compressedTexturePVRTC>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG,     1,  1,  1,   1, 4, false, RequireExt<&Extensions::compressedTexturePVRTC>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG,     1,  1,  1,   1, 4, false, RequireExt<&Extensions::compressedTexturePVRTC>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     // From GL_EXT_pvrtc_sRGB
     //                       | Internal format                             | W | H | D | BS |CC| SRGB | Texture supported                                     | Filterable     | Texture attachment | Renderbuffer  | Blend
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB_PVRTC_2BPPV1_EXT,           1,  1,  1,   1, 3,  true, RequireExt<&Extensions::compressedTexturePVRTCsRGB>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB_PVRTC_4BPPV1_EXT,           1,  1,  1,   1, 3,  true, RequireExt<&Extensions::compressedTexturePVRTCsRGB>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB_ALPHA_PVRTC_2BPPV1_EXT,     1,  1,  1,   1, 4,  true, RequireExt<&Extensions::compressedTexturePVRTCsRGB>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB_ALPHA_PVRTC_4BPPV1_EXT,     1,  1,  1,   1, 4,  true, RequireExt<&Extensions::compressedTexturePVRTCsRGB>,    AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     // For STENCIL_INDEX8 we chose a normalized component type for the following reasons:
     // - Multisampled buffer are disallowed for non-normalized integer component types and we want to support it for STENCIL_INDEX8
     // - All other stencil formats (all depth-stencil) are either float or normalized
     // - It affects only validation of internalformat in RenderbufferStorageMultisample.
     //                         | Internal format  |sized|D |S |X | Format    | Type            | Component type        | Texture supported | Filterable    | Texture attachment | Renderbuffer   | Blend
     AddDepthStencilFormat(&map, GL_STENCIL_INDEX8, true, 0, 8, 0, GL_STENCIL, GL_UNSIGNED_BYTE, GL_UNSIGNED_NORMALIZED, RequireES<1, 0>,    NeverSupported, RequireES<1, 0>,     RequireES<1, 0>, RequireES<1, 0>);

     // From GL_ANGLE_lossy_etc_decode
     //                       | Internal format                                                |W |H |D |BS |CC| SRGB | Texture supported                      | Filterable     | Texture attachment | Renderbuffer  | Blend
     AddCompressedFormat(&map, GL_ETC1_RGB8_LOSSY_DECODE_ANGLE,                                 4, 4, 1, 64, 3, false, RequireExt<&Extensions::lossyETCDecode>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGB8_LOSSY_DECODE_ETC2_ANGLE,                      4, 4, 1, 64, 3, false, RequireExt<&Extensions::lossyETCDecode>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_LOSSY_DECODE_ETC2_ANGLE,                     4, 4, 1, 64, 3, true,  RequireExt<&Extensions::lossyETCDecode>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_LOSSY_DECODE_ETC2_ANGLE,  4, 4, 1, 64, 3, false, RequireExt<&Extensions::lossyETCDecode>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddCompressedFormat(&map, GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_LOSSY_DECODE_ETC2_ANGLE, 4, 4, 1, 64, 3, true,  RequireExt<&Extensions::lossyETCDecode>, AlwaysSupported, NeverSupported,      NeverSupported, NeverSupported);

     // From GL_EXT_texture_norm16
     //                 | Internal format    |sized| R | G | B | A |S | Format | Type             | Component type        | SRGB | Texture supported                     | Filterable     | Texture attachment                    | Renderbuffer                          | Blend
     AddRGBAFormat(&map, GL_R16_EXT,          true, 16,  0,  0,  0, 0, GL_RED,  GL_UNSIGNED_SHORT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16>, AlwaysSupported, RequireExt<&Extensions::textureNorm16>, RequireExt<&Extensions::textureNorm16>, RequireExt<&Extensions::textureNorm16>);
     AddRGBAFormat(&map, GL_R16_SNORM_EXT,    true, 16,  0,  0,  0, 0, GL_RED,  GL_SHORT,          GL_SIGNED_NORMALIZED,   false, RequireExt<&Extensions::textureNorm16>, AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);
     AddRGBAFormat(&map, GL_RG16_EXT,         true, 16, 16,  0,  0, 0, GL_RG,   GL_UNSIGNED_SHORT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16>, AlwaysSupported, RequireExt<&Extensions::textureNorm16>, RequireExt<&Extensions::textureNorm16>, RequireExt<&Extensions::textureNorm16>);
     AddRGBAFormat(&map, GL_RG16_SNORM_EXT,   true, 16, 16,  0,  0, 0, GL_RG,   GL_SHORT,          GL_SIGNED_NORMALIZED,   false, RequireExt<&Extensions::textureNorm16>, AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);
     AddRGBAFormat(&map, GL_RGB16_EXT,        true, 16, 16, 16,  0, 0, GL_RGB,  GL_UNSIGNED_SHORT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16>, AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);
     AddRGBAFormat(&map, GL_RGB16_SNORM_EXT,  true, 16, 16, 16,  0, 0, GL_RGB,  GL_SHORT,          GL_SIGNED_NORMALIZED,   false, RequireExt<&Extensions::textureNorm16>, AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);
     AddRGBAFormat(&map, GL_RGBA16_EXT,       true, 16, 16, 16, 16, 0, GL_RGBA, GL_UNSIGNED_SHORT, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16>, AlwaysSupported, RequireExt<&Extensions::textureNorm16>, RequireExt<&Extensions::textureNorm16>, RequireExt<&Extensions::textureNorm16>);
     AddRGBAFormat(&map, GL_RGBA16_SNORM_EXT, true, 16, 16, 16, 16, 0, GL_RGBA, GL_SHORT,          GL_SIGNED_NORMALIZED,   false, RequireExt<&Extensions::textureNorm16>, AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);

     // From EXT_texture_sRGB_R8
     //                 | Internal format    |sized| R | G | B | A |S | Format | Type             | Component type        | SRGB | Texture supported                     | Filterable     | Texture attachment                    | Renderbuffer                          | Blend
     AddRGBAFormat(&map, GL_SR8_EXT,          true,  8,  0,  0,  0, 0, GL_RED,  GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, true,  RequireExt<&Extensions::sRGBR8EXT>,     AlwaysSupported, NeverSupported,                         NeverSupported,                         NeverSupported);

     // Unsized formats
     //                 | Internal format  |sized | R | G | B | A |S | Format           | Type                          | Component type        | SRGB | Texture supported                               | Filterable     | Texture attachment                            | Renderbuffer  | Blend
     AddRGBAFormat(&map, GL_RED,            false,  8,  0,  0,  0, 0, GL_RED,            GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureRG>,               AlwaysSupported, RequireExt<&Extensions::textureRG>,             NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RED,            false,  8,  0,  0,  0, 0, GL_RED,            GL_BYTE,                        GL_SIGNED_NORMALIZED,   false, NeverSupported,                                   NeverSupported,  NeverSupported,                                 NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RED,            false, 16,  0,  0,  0, 0, GL_RED,            GL_UNSIGNED_SHORT,              GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16>,           AlwaysSupported, RequireExt<&Extensions::textureNorm16>,         NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RG,             false,  8,  8,  0,  0, 0, GL_RG,             GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureRG>,               AlwaysSupported, RequireExt<&Extensions::textureRG>,             NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RG,             false,  8,  8,  0,  0, 0, GL_RG,             GL_BYTE,                        GL_SIGNED_NORMALIZED,   false, NeverSupported,                                   NeverSupported,  NeverSupported,                                 NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RG,             false, 16, 16,  0,  0, 0, GL_RG,             GL_UNSIGNED_SHORT,              GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16>,           AlwaysSupported, RequireExt<&Extensions::textureNorm16>,         NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB,            false,  8,  8,  8,  0, 0, GL_RGB,            GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, AlwaysSupported,                                  AlwaysSupported, RequireES<2, 0>,                                NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB,            false,  5,  6,  5,  0, 0, GL_RGB,            GL_UNSIGNED_SHORT_5_6_5,        GL_UNSIGNED_NORMALIZED, false, AlwaysSupported,                                  AlwaysSupported, RequireES<2, 0>,                                NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB,            false,  8,  8,  8,  0, 0, GL_RGB,            GL_BYTE,                        GL_SIGNED_NORMALIZED,   false, NeverSupported,                                   NeverSupported,  NeverSupported,                                 NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB,            false, 10, 10, 10,  0, 0, GL_RGB,            GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormat2101010REV>, AlwaysSupported, NeverSupported,                                 NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA,           false,  4,  4,  4,  4, 0, GL_RGBA,           GL_UNSIGNED_SHORT_4_4_4_4,      GL_UNSIGNED_NORMALIZED, false, AlwaysSupported,                                  AlwaysSupported, RequireES<2, 0>,                                NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA,           false,  5,  5,  5,  1, 0, GL_RGBA,           GL_UNSIGNED_SHORT_5_5_5_1,      GL_UNSIGNED_NORMALIZED, false, AlwaysSupported,                                  AlwaysSupported, RequireES<2, 0>,                                NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA,           false,  8,  8,  8,  8, 0, GL_RGBA,           GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, AlwaysSupported,                                  AlwaysSupported, RequireES<2, 0>,                                NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA,           false, 16, 16, 16, 16, 0, GL_RGBA,           GL_UNSIGNED_SHORT,              GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureNorm16>,           AlwaysSupported, RequireExt<&Extensions::textureNorm16>,         NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA,           false, 10, 10, 10,  2, 0, GL_RGBA,           GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormat2101010REV>, AlwaysSupported, NeverSupported,                                 NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA,           false,  8,  8,  8,  8, 0, GL_RGBA,           GL_BYTE,                        GL_SIGNED_NORMALIZED,   false, NeverSupported,                                   NeverSupported,  NeverSupported,                                 NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_SRGB,           false,  8,  8,  8,  0, 0, GL_SRGB,           GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, true,  RequireExt<&Extensions::sRGB>,                    AlwaysSupported, NeverSupported,                                 NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_SRGB_ALPHA_EXT, false,  8,  8,  8,  8, 0, GL_SRGB_ALPHA_EXT, GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, true,  RequireExt<&Extensions::sRGB>,                    AlwaysSupported, RequireExt<&Extensions::sRGB>,                  NeverSupported, NeverSupported);
 #if defined(ANGLE_PLATFORM_IOS) && !defined(ANGLE_PLATFORM_MACCATALYST)
     AddRGBAFormat(&map, GL_BGRA_EXT,       false,  8,  8,  8,  8, 0, GL_BGRA_EXT,       GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, RequireES<2, 0>,                                  AlwaysSupported, RequireES<2, 0>,                                NeverSupported, NeverSupported);
 #else
     AddRGBAFormat(&map, GL_BGRA_EXT,       false,  8,  8,  8,  8, 0, GL_BGRA_EXT,       GL_UNSIGNED_BYTE,               GL_UNSIGNED_NORMALIZED, false, RequireExt<&Extensions::textureFormatBGRA8888>,   AlwaysSupported, RequireExt<&Extensions::textureFormatBGRA8888>, NeverSupported, NeverSupported);
 #endif

     // Unsized integer formats
     //                 |Internal format |sized | R | G | B | A |S | Format         | Type                          | Component type | SRGB | Texture supported | Filterable    | Texture attachment | Renderbuffer  | Blend
     AddRGBAFormat(&map, GL_RED_INTEGER,  false,  8,  0,  0,  0, 0, GL_RED_INTEGER,  GL_BYTE,                        GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RED_INTEGER,  false,  8,  0,  0,  0, 0, GL_RED_INTEGER,  GL_UNSIGNED_BYTE,               GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RED_INTEGER,  false, 16,  0,  0,  0, 0, GL_RED_INTEGER,  GL_SHORT,                       GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RED_INTEGER,  false, 16,  0,  0,  0, 0, GL_RED_INTEGER,  GL_UNSIGNED_SHORT,              GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RED_INTEGER,  false, 32,  0,  0,  0, 0, GL_RED_INTEGER,  GL_INT,                         GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RED_INTEGER,  false, 32,  0,  0,  0, 0, GL_RED_INTEGER,  GL_UNSIGNED_INT,                GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RG_INTEGER,   false,  8,  8,  0,  0, 0, GL_RG_INTEGER,   GL_BYTE,                        GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RG_INTEGER,   false,  8,  8,  0,  0, 0, GL_RG_INTEGER,   GL_UNSIGNED_BYTE,               GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RG_INTEGER,   false, 16, 16,  0,  0, 0, GL_RG_INTEGER,   GL_SHORT,                       GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RG_INTEGER,   false, 16, 16,  0,  0, 0, GL_RG_INTEGER,   GL_UNSIGNED_SHORT,              GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RG_INTEGER,   false, 32, 32,  0,  0, 0, GL_RG_INTEGER,   GL_INT,                         GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RG_INTEGER,   false, 32, 32,  0,  0, 0, GL_RG_INTEGER,   GL_UNSIGNED_INT,                GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB_INTEGER,  false,  8,  8,  8,  0, 0, GL_RGB_INTEGER,  GL_BYTE,                        GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB_INTEGER,  false,  8,  8,  8,  0, 0, GL_RGB_INTEGER,  GL_UNSIGNED_BYTE,               GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB_INTEGER,  false, 16, 16, 16,  0, 0, GL_RGB_INTEGER,  GL_SHORT,                       GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB_INTEGER,  false, 16, 16, 16,  0, 0, GL_RGB_INTEGER,  GL_UNSIGNED_SHORT,              GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB_INTEGER,  false, 32, 32, 32,  0, 0, GL_RGB_INTEGER,  GL_INT,                         GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB_INTEGER,  false, 32, 32, 32,  0, 0, GL_RGB_INTEGER,  GL_UNSIGNED_INT,                GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA_INTEGER, false,  8,  8,  8,  8, 0, GL_RGBA_INTEGER, GL_BYTE,                        GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA_INTEGER, false,  8,  8,  8,  8, 0, GL_RGBA_INTEGER, GL_UNSIGNED_BYTE,               GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA_INTEGER, false, 16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_SHORT,                       GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA_INTEGER, false, 16, 16, 16, 16, 0, GL_RGBA_INTEGER, GL_UNSIGNED_SHORT,              GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA_INTEGER, false, 32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_INT,                         GL_INT,          false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA_INTEGER, false, 32, 32, 32, 32, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT,                GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA_INTEGER, false, 10, 10, 10,  2, 0, GL_RGBA_INTEGER, GL_UNSIGNED_INT_2_10_10_10_REV, GL_UNSIGNED_INT, false, RequireES<3, 0>,    NeverSupported, NeverSupported,      NeverSupported, NeverSupported);

     // Unsized floating point formats
     //                 |Internal format |sized | R | G | B | A |S | Format | Type                           | Comp    | SRGB | Texture supported                                                         | Filterable                                     | Texture attachment                             | Renderbuffer  | Blend
     AddRGBAFormat(&map, GL_RED,          false, 16,  0,  0,  0, 0, GL_RED,  GL_HALF_FLOAT,                   GL_FLOAT, false, NeverSupported,                                                             NeverSupported,                                  NeverSupported,                                  NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RG,           false, 16, 16,  0,  0, 0, GL_RG,   GL_HALF_FLOAT,                   GL_FLOAT, false, NeverSupported,                                                             NeverSupported,                                  NeverSupported,                                  NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB,          false, 16, 16, 16,  0, 0, GL_RGB,  GL_HALF_FLOAT,                   GL_FLOAT, false, NeverSupported,                                                             NeverSupported,                                  NeverSupported,                                  NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA,         false, 16, 16, 16, 16, 0, GL_RGBA, GL_HALF_FLOAT,                   GL_FLOAT, false, NeverSupported,                                                             NeverSupported,                                  NeverSupported,                                  NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RED,          false, 16,  0,  0,  0, 0, GL_RED,  GL_HALF_FLOAT_OES,               GL_FLOAT, false, RequireExtAndExt<&Extensions::textureHalfFloat, &Extensions::textureRG>,    RequireExt<&Extensions::textureHalfFloatLinear>, AlwaysSupported,                                 NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RG,           false, 16, 16,  0,  0, 0, GL_RG,   GL_HALF_FLOAT_OES,               GL_FLOAT, false, RequireExtAndExt<&Extensions::textureHalfFloat, &Extensions::textureRG>,    RequireExt<&Extensions::textureHalfFloatLinear>, AlwaysSupported,                                 NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB,          false, 16, 16, 16,  0, 0, GL_RGB,  GL_HALF_FLOAT_OES,               GL_FLOAT, false, RequireExt<&Extensions::textureHalfFloat>,                                  RequireExt<&Extensions::textureHalfFloatLinear>, UnsizedHalfFloatOESRGBATextureAttachmentSupport, NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA,         false, 16, 16, 16, 16, 0, GL_RGBA, GL_HALF_FLOAT_OES,               GL_FLOAT, false, RequireExt<&Extensions::textureHalfFloat>,                                  RequireExt<&Extensions::textureHalfFloatLinear>, UnsizedHalfFloatOESRGBATextureAttachmentSupport, NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RED,          false, 32,  0,  0,  0, 0, GL_RED,  GL_FLOAT,                        GL_FLOAT, false, RequireExtAndExt<&Extensions::textureFloatOES, &Extensions::textureRG>,     RequireExt<&Extensions::textureFloatLinearOES>,  AlwaysSupported,                                 NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RG,           false, 32, 32,  0,  0, 0, GL_RG,   GL_FLOAT,                        GL_FLOAT, false, RequireExtAndExt<&Extensions::textureFloatOES, &Extensions::textureRG>,     RequireExt<&Extensions::textureFloatLinearOES>,  AlwaysSupported,                                 NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB,          false, 32, 32, 32,  0, 0, GL_RGB,  GL_FLOAT,                        GL_FLOAT, false, RequireExt<&Extensions::textureFloatOES>,                                   RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,                                  NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB,          false,  9,  9,  9,  0, 5, GL_RGB,  GL_UNSIGNED_INT_5_9_9_9_REV,     GL_FLOAT, false, NeverSupported,                                                             NeverSupported,                                  NeverSupported,                                  NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGB,          false, 11, 11, 10,  0, 0, GL_RGB,  GL_UNSIGNED_INT_10F_11F_11F_REV, GL_FLOAT, false, NeverSupported,                                                             NeverSupported,                                  NeverSupported,                                  NeverSupported, NeverSupported);
     AddRGBAFormat(&map, GL_RGBA,         false, 32, 32, 32, 32, 0, GL_RGBA, GL_FLOAT,                        GL_FLOAT, false, RequireExt<&Extensions::textureFloatOES>,                                   RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,                                  NeverSupported, NeverSupported);

     // Unsized luminance alpha formats
     //                 | Internal format   |sized | L | A | Format            | Type             | Component type        | Texture supported                        | Filterable                                     | Texture attachment | Renderbuffer  | Blend
     AddLUMAFormat(&map, GL_ALPHA,           false,  0,  8, GL_ALPHA,           GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, AlwaysSupported,                           AlwaysSupported,                                 NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_LUMINANCE,       false,  8,  0, GL_LUMINANCE,       GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, AlwaysSupported,                           AlwaysSupported,                                 NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_LUMINANCE_ALPHA, false,  8,  8, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE,  GL_UNSIGNED_NORMALIZED, AlwaysSupported,                           AlwaysSupported,                                 NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_ALPHA,           false,  0, 16, GL_ALPHA,           GL_HALF_FLOAT_OES, GL_FLOAT,               RequireExt<&Extensions::textureHalfFloat>, RequireExt<&Extensions::textureHalfFloatLinear>, NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_LUMINANCE,       false, 16,  0, GL_LUMINANCE,       GL_HALF_FLOAT_OES, GL_FLOAT,               RequireExt<&Extensions::textureHalfFloat>, RequireExt<&Extensions::textureHalfFloatLinear>, NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_LUMINANCE_ALPHA, false, 16, 16, GL_LUMINANCE_ALPHA, GL_HALF_FLOAT_OES, GL_FLOAT,               RequireExt<&Extensions::textureHalfFloat>, RequireExt<&Extensions::textureHalfFloatLinear>, NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_ALPHA,           false,  0, 32, GL_ALPHA,           GL_FLOAT,          GL_FLOAT,               RequireExt<&Extensions::textureFloatOES>,  RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_LUMINANCE,       false, 32,  0, GL_LUMINANCE,       GL_FLOAT,          GL_FLOAT,               RequireExt<&Extensions::textureFloatOES>,  RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,      NeverSupported, NeverSupported);
     AddLUMAFormat(&map, GL_LUMINANCE_ALPHA, false, 32, 32, GL_LUMINANCE_ALPHA, GL_FLOAT,          GL_FLOAT,               RequireExt<&Extensions::textureFloatOES>,  RequireExt<&Extensions::textureFloatLinearOES>,  NeverSupported,      NeverSupported, NeverSupported);

     // Unsized depth stencil formats
     //                         | Internal format   |sized | D |S | X | Format            | Type                             | Component type        | Texture supported                                       | Filterable     | Texture attachment                                                                  | Renderbuffer                                                                       | Blend
     AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT, false, 16, 0,  0, GL_DEPTH_COMPONENT, GL_UNSIGNED_SHORT,                 GL_UNSIGNED_NORMALIZED, RequireES<1, 0>,                                          AlwaysSupported, RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>,        RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>,        RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>);
     AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT, false, 24, 0,  0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT,                   GL_UNSIGNED_NORMALIZED, RequireES<1, 0>,                                          AlwaysSupported, RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>,        RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>,        RequireExtOrExt<&Extensions::depthTextureANGLE, &Extensions::depthTextureOES>);
     AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT, false, 32, 0,  0, GL_DEPTH_COMPONENT, GL_FLOAT,                          GL_FLOAT,               RequireES<1, 0>,                                          AlwaysSupported, RequireES<1, 0>,                                                                      RequireES<1, 0>,                                                                      RequireES<1, 0>);
     AddDepthStencilFormat(&map, GL_DEPTH_COMPONENT, false, 24, 8,  0, GL_DEPTH_COMPONENT, GL_UNSIGNED_INT_24_8,              GL_UNSIGNED_NORMALIZED, RequireESOrExt<3, 0, &Extensions::packedDepthStencilOES>, AlwaysSupported, RequireExtAndExt<&Extensions::packedDepthStencilOES, &Extensions::depthTextureANGLE>, RequireExtAndExt<&Extensions::packedDepthStencilOES, &Extensions::depthTextureANGLE>, RequireExtAndExt<&Extensions::packedDepthStencilOES, &Extensions::depthTextureANGLE>);
     AddDepthStencilFormat(&map, GL_DEPTH_STENCIL,   false, 24, 8,  0, GL_DEPTH_STENCIL,   GL_UNSIGNED_INT_24_8,              GL_UNSIGNED_NORMALIZED, RequireESOrExt<3, 0, &Extensions::packedDepthStencilOES>, AlwaysSupported, RequireExtAndExt<&Extensions::packedDepthStencilOES, &Extensions::depthTextureANGLE>, RequireExtAndExt<&Extensions::packedDepthStencilOES, &Extensions::depthTextureANGLE>, RequireExtAndExt<&Extensions::packedDepthStencilOES, &Extensions::depthTextureANGLE>);
     AddDepthStencilFormat(&map, GL_DEPTH_STENCIL,   false, 32, 8, 24, GL_DEPTH_STENCIL,   GL_FLOAT_32_UNSIGNED_INT_24_8_REV, GL_FLOAT,               RequireESOrExt<3, 0, &Extensions::packedDepthStencilOES>, AlwaysSupported, RequireExt<&Extensions::packedDepthStencilOES>,                                       RequireExt<&Extensions::packedDepthStencilOES>,                                       RequireExt<&Extensions::packedDepthStencilOES>);
     AddDepthStencilFormat(&map, GL_STENCIL,         false,  0, 8,  0, GL_STENCIL,         GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, RequireES<1, 0>,                                          NeverSupported , RequireES<1, 0>,                                                                      RequireES<1, 0>,                                                                      RequireES<1, 0>);
     AddDepthStencilFormat(&map, GL_STENCIL_INDEX,   false,  0, 8,  0, GL_STENCIL_INDEX,   GL_UNSIGNED_BYTE,                  GL_UNSIGNED_NORMALIZED, RequireES<3, 1>,                                          NeverSupported , RequireES<3, 1>,                                                                      RequireES<3, 1>,                                                                      RequireES<3, 1>);
     // clang-format on

     return map;
 }

 const InternalFormatInfoMap &GetInternalFormatMap()
 {
     static const angle::base::NoDestructor<InternalFormatInfoMap> formatMap(
         BuildInternalFormatInfoMap());
     return *formatMap;
 }

 static FormatSet BuildAllSizedInternalFormatSet()
 {
     FormatSet result;

     for (const auto &internalFormat : GetInternalFormatMap())
     {
         for (const auto &type : internalFormat.second)
         {
             if (type.second.sized)
             {
                 // TODO(jmadill): Fix this hack.
                 if (internalFormat.first == GL_BGR565_ANGLEX)
                     continue;

                 result.insert(internalFormat.first);
             }
         }
     }

     return result;
 }

 uint32_t GetPackedTypeInfo(GLenum type)
 {
     switch (type)
     {
         case GL_UNSIGNED_BYTE:
         case GL_BYTE:
         {
             static constexpr uint32_t kPacked = PackTypeInfo(1, false);
             return kPacked;
         }
         case GL_UNSIGNED_SHORT:
         case GL_SHORT:
         case GL_HALF_FLOAT:
         case GL_HALF_FLOAT_OES:
         {
             static constexpr uint32_t kPacked = PackTypeInfo(2, false);
             return kPacked;
         }
         case GL_UNSIGNED_INT:
         case GL_INT:
         case GL_FLOAT:
         {
             static constexpr uint32_t kPacked = PackTypeInfo(4, false);
             return kPacked;
         }
         case GL_UNSIGNED_SHORT_5_6_5:
         case GL_UNSIGNED_SHORT_4_4_4_4:
         case GL_UNSIGNED_SHORT_5_5_5_1:
         case GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT:
         case GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT:
         {
             static constexpr uint32_t kPacked = PackTypeInfo(2, true);
             return kPacked;
         }
         case GL_UNSIGNED_INT_2_10_10_10_REV:
         case GL_UNSIGNED_INT_24_8:
         case GL_UNSIGNED_INT_10F_11F_11F_REV:
         case GL_UNSIGNED_INT_5_9_9_9_REV:
         {
             ASSERT(GL_UNSIGNED_INT_24_8_OES == GL_UNSIGNED_INT_24_8);
             static constexpr uint32_t kPacked = PackTypeInfo(4, true);
             return kPacked;
         }
         case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
         {
             static constexpr uint32_t kPacked = PackTypeInfo(8, true);
             return kPacked;
         }
         default:
         {
             return 0;
         }
     }
 }

 const InternalFormat &GetSizedInternalFormatInfo(GLenum internalFormat)
 {
     static const InternalFormat defaultInternalFormat;
     const InternalFormatInfoMap &formatMap = GetInternalFormatMap();
     auto iter                              = formatMap.find(internalFormat);

     // Sized internal formats only have one type per entry
     if (iter == formatMap.end() || iter->second.size() != 1)
     {
         return defaultInternalFormat;
     }

     const InternalFormat &internalFormatInfo = iter->second.begin()->second;
     if (!internalFormatInfo.sized)
     {
         return defaultInternalFormat;
     }

     return internalFormatInfo;
 }

 const InternalFormat &GetInternalFormatInfo(GLenum internalFormat, GLenum type)
 {
     static const InternalFormat defaultInternalFormat;
     const InternalFormatInfoMap &formatMap = GetInternalFormatMap();

     auto internalFormatIter = formatMap.find(internalFormat);
     if (internalFormatIter == formatMap.end())
     {
         return defaultInternalFormat;
     }

     // If the internal format is sized, simply return it without the type check.
     if (internalFormatIter->second.size() == 1 && internalFormatIter->second.begin()->second.sized)
     {
         return internalFormatIter->second.begin()->second;
     }

     auto typeIter = internalFormatIter->second.find(type);
     if (typeIter == internalFormatIter->second.end())
     {
         return defaultInternalFormat;
     }

     return typeIter->second;
 }

 GLuint InternalFormat::computePixelBytes(GLenum formatType) const
 {
     const auto &typeInfo = GetTypeInfo(formatType);
     GLuint components    = typeInfo.specialInterpretation ? 1u : componentCount;
     return components * typeInfo.bytes;
 }

 bool InternalFormat::computeRowPitch(GLenum formatType,
                                      GLsizei width,
                                      GLint alignment,
                                      GLint rowLength,
                                      GLuint *resultOut) const
 {
     // Compressed images do not use pack/unpack parameters.
     if (compressed)
     {
         ASSERT(rowLength == 0);
         return computeCompressedImageSize(Extents(width, 1, 1), resultOut);
     }

     CheckedNumeric<GLuint> checkedWidth(rowLength > 0 ? rowLength : width);
     CheckedNumeric<GLuint> checkedRowBytes = checkedWidth * computePixelBytes(formatType);

     ASSERT(alignment > 0 && isPow2(alignment));
     CheckedNumeric<GLuint> checkedAlignment(alignment);
     auto aligned = rx::roundUp(checkedRowBytes, checkedAlignment);
     return CheckedMathResult(aligned, resultOut);
 }

 bool InternalFormat::computeDepthPitch(GLsizei height,
                                        GLint imageHeight,
                                        GLuint rowPitch,
                                        GLuint *resultOut) const
 {
     CheckedNumeric<GLuint> pixelsHeight(imageHeight > 0 ? static_cast<GLuint>(imageHeight)
                                                         : static_cast<GLuint>(height));

     CheckedNumeric<GLuint> rowCount;
     if (compressed)
     {
         CheckedNumeric<GLuint> checkedBlockHeight(compressedBlockHeight);
         rowCount = (pixelsHeight + checkedBlockHeight - 1u) / checkedBlockHeight;
     }
     else
     {
         rowCount = pixelsHeight;
     }

     CheckedNumeric<GLuint> checkedRowPitch(rowPitch);

     return CheckedMathResult(checkedRowPitch * rowCount, resultOut);
 }

 bool InternalFormat::computeDepthPitch(GLenum formatType,
                                        GLsizei width,
                                        GLsizei height,
                                        GLint alignment,
                                        GLint rowLength,
                                        GLint imageHeight,
                                        GLuint *resultOut) const
 {
     GLuint rowPitch = 0;
     if (!computeRowPitch(formatType, width, alignment, rowLength, &rowPitch))
     {
         return false;
     }
     return computeDepthPitch(height, imageHeight, rowPitch, resultOut);
 }

 bool InternalFormat::computeCompressedImageSize(const Extents &size, GLuint *resultOut) const
 {
     CheckedNumeric<GLuint> checkedWidth(size.width);
     CheckedNumeric<GLuint> checkedHeight(size.height);
     CheckedNumeric<GLuint> checkedDepth(size.depth);
     CheckedNumeric<GLuint> checkedBlockWidth(compressedBlockWidth);
     CheckedNumeric<GLuint> checkedBlockHeight(compressedBlockHeight);

     ASSERT(compressed);
     auto numBlocksWide = (checkedWidth + checkedBlockWidth - 1u) / checkedBlockWidth;
     auto numBlocksHigh = (checkedHeight + checkedBlockHeight - 1u) / checkedBlockHeight;
     auto bytes         = numBlocksWide * numBlocksHigh * pixelBytes * checkedDepth;
     return CheckedMathResult(bytes, resultOut);
 }

 bool InternalFormat::computeSkipBytes(GLenum formatType,
                                       GLuint rowPitch,
                                       GLuint depthPitch,
                                       const PixelStoreStateBase &state,
                                       bool is3D,
                                       GLuint *resultOut) const
 {
     CheckedNumeric<GLuint> checkedRowPitch(rowPitch);
     CheckedNumeric<GLuint> checkedDepthPitch(depthPitch);
     CheckedNumeric<GLuint> checkedSkipImages(static_cast<GLuint>(state.skipImages));
     CheckedNumeric<GLuint> checkedSkipRows(static_cast<GLuint>(state.skipRows));
     CheckedNumeric<GLuint> checkedSkipPixels(static_cast<GLuint>(state.skipPixels));
     CheckedNumeric<GLuint> checkedPixelBytes(computePixelBytes(formatType));
     auto checkedSkipImagesBytes = checkedSkipImages * checkedDepthPitch;
     if (!is3D)
     {
         checkedSkipImagesBytes = 0;
     }
     auto skipBytes = checkedSkipImagesBytes + checkedSkipRows * checkedRowPitch +
                      checkedSkipPixels * checkedPixelBytes;
     return CheckedMathResult(skipBytes, resultOut);
 }

 bool InternalFormat::computePackUnpackEndByte(GLenum formatType,
                                               const Extents &size,
                                               const PixelStoreStateBase &state,
                                               bool is3D,
                                               GLuint *resultOut) const
 {
     GLuint rowPitch = 0;
     if (!computeRowPitch(formatType, size.width, state.alignment, state.rowLength, &rowPitch))
     {
         return false;
     }

     GLuint depthPitch = 0;
     if (is3D && !computeDepthPitch(size.height, state.imageHeight, rowPitch, &depthPitch))
     {
         return false;
     }

     CheckedNumeric<GLuint> checkedCopyBytes(0);
     if (compressed)
     {
         GLuint copyBytes = 0;
         if (!computeCompressedImageSize(size, &copyBytes))
         {
             return false;
         }
         checkedCopyBytes = copyBytes;
     }
     else if (size.height != 0 && (!is3D || size.depth != 0))
     {
         CheckedNumeric<GLuint> bytes = computePixelBytes(formatType);
         checkedCopyBytes += size.width * bytes;

         CheckedNumeric<GLuint> heightMinusOne = size.height - 1;
         checkedCopyBytes += heightMinusOne * rowPitch;

         if (is3D)
         {
             CheckedNumeric<GLuint> depthMinusOne = size.depth - 1;
             checkedCopyBytes += depthMinusOne * depthPitch;
         }
     }

     GLuint skipBytes = 0;
     if (!computeSkipBytes(formatType, rowPitch, depthPitch, state, is3D, &skipBytes))
     {
         return false;
     }

     CheckedNumeric<GLuint> endByte = checkedCopyBytes + CheckedNumeric<GLuint>(skipBytes);

     return CheckedMathResult(endByte, resultOut);
 }

 GLenum GetUnsizedFormat(GLenum internalFormat)
 {
     auto sizedFormatInfo = GetSizedInternalFormatInfo(internalFormat);
     if (sizedFormatInfo.internalFormat != GL_NONE)
     {
         return sizedFormatInfo.format;
     }

     return internalFormat;
 }

 bool CompressedFormatRequiresWholeImage(GLenum internalFormat)
 {
     // List of compressed texture format that require that the sub-image size is equal to texture's
     // respective mip level's size
     switch (internalFormat)
     {
         case GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG:
         case GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG:
         case GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG:
         case GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG:
         case GL_COMPRESSED_SRGB_PVRTC_2BPPV1_EXT:
         case GL_COMPRESSED_SRGB_PVRTC_4BPPV1_EXT:
         case GL_COMPRESSED_SRGB_ALPHA_PVRTC_2BPPV1_EXT:
         case GL_COMPRESSED_SRGB_ALPHA_PVRTC_4BPPV1_EXT:
             return true;

         default:
             return false;
     }
 }

 const FormatSet &GetAllSizedInternalFormats()
 {
     static angle::base::NoDestructor<FormatSet> formatSet(BuildAllSizedInternalFormatSet());
     return *formatSet;
 }

 AttributeType GetAttributeType(GLenum enumValue)
 {
     switch (enumValue)
     {
         case GL_FLOAT:
             return ATTRIBUTE_FLOAT;
         case GL_FLOAT_VEC2:
             return ATTRIBUTE_VEC2;
         case GL_FLOAT_VEC3:
             return ATTRIBUTE_VEC3;
         case GL_FLOAT_VEC4:
             return ATTRIBUTE_VEC4;
         case GL_INT:
             return ATTRIBUTE_INT;
         case GL_INT_VEC2:
             return ATTRIBUTE_IVEC2;
         case GL_INT_VEC3:
             return ATTRIBUTE_IVEC3;
         case GL_INT_VEC4:
             return ATTRIBUTE_IVEC4;
         case GL_UNSIGNED_INT:
             return ATTRIBUTE_UINT;
         case GL_UNSIGNED_INT_VEC2:
             return ATTRIBUTE_UVEC2;
         case GL_UNSIGNED_INT_VEC3:
             return ATTRIBUTE_UVEC3;
         case GL_UNSIGNED_INT_VEC4:
             return ATTRIBUTE_UVEC4;
         case GL_FLOAT_MAT2:
             return ATTRIBUTE_MAT2;
         case GL_FLOAT_MAT3:
             return ATTRIBUTE_MAT3;
         case GL_FLOAT_MAT4:
             return ATTRIBUTE_MAT4;
         case GL_FLOAT_MAT2x3:
             return ATTRIBUTE_MAT2x3;
         case GL_FLOAT_MAT2x4:
             return ATTRIBUTE_MAT2x4;
         case GL_FLOAT_MAT3x2:
             return ATTRIBUTE_MAT3x2;
         case GL_FLOAT_MAT3x4:
             return ATTRIBUTE_MAT3x4;
         case GL_FLOAT_MAT4x2:
             return ATTRIBUTE_MAT4x2;
         case GL_FLOAT_MAT4x3:
             return ATTRIBUTE_MAT4x3;
         default:
             UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
             return ATTRIBUTE_FLOAT;
 #endif
     }
 }

 angle::FormatID GetVertexFormatID(VertexAttribType type,
                                   GLboolean normalized,
                                   GLuint components,
                                   bool pureInteger)
 {
     switch (type)
     {
         case VertexAttribType::Byte:
             switch (components)
             {
                 case 1:
                     if (pureInteger)
                         return angle::FormatID::R8_SINT;
                     if (normalized)
                         return angle::FormatID::R8_SNORM;
                     return angle::FormatID::R8_SSCALED;
                 case 2:
                     if (pureInteger)
                         return angle::FormatID::R8G8_SINT;
                     if (normalized)
                         return angle::FormatID::R8G8_SNORM;
                     return angle::FormatID::R8G8_SSCALED;
                 case 3:
                     if (pureInteger)
                         return angle::FormatID::R8G8B8_SINT;
                     if (normalized)
                         return angle::FormatID::R8G8B8_SNORM;
                     return angle::FormatID::R8G8B8_SSCALED;
                 case 4:
                     if (pureInteger)
                         return angle::FormatID::R8G8B8A8_SINT;
                     if (normalized)
                         return angle::FormatID::R8G8B8A8_SNORM;
                     return angle::FormatID::R8G8B8A8_SSCALED;
                 default:
                     UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
                     return angle::FormatID::NONE;
 #endif
             }
         case VertexAttribType::UnsignedByte:
             switch (components)
             {
                 case 1:
                     if (pureInteger)
                         return angle::FormatID::R8_UINT;
                     if (normalized)
                         return angle::FormatID::R8_UNORM;
                     return angle::FormatID::R8_USCALED;
                 case 2:
                     if (pureInteger)
                         return angle::FormatID::R8G8_UINT;
                     if (normalized)
                         return angle::FormatID::R8G8_UNORM;
                     return angle::FormatID::R8G8_USCALED;
                 case 3:
                     if (pureInteger)
                         return angle::FormatID::R8G8B8_UINT;
                     if (normalized)
                         return angle::FormatID::R8G8B8_UNORM;
                     return angle::FormatID::R8G8B8_USCALED;
                 case 4:
                     if (pureInteger)
                         return angle::FormatID::R8G8B8A8_UINT;
                     if (normalized)
                         return angle::FormatID::R8G8B8A8_UNORM;
                     return angle::FormatID::R8G8B8A8_USCALED;
                 default:
                     UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
                     return angle::FormatID::NONE;
 #endif
             }
         case VertexAttribType::Short:
             switch (components)
             {
                 case 1:
                     if (pureInteger)
                         return angle::FormatID::R16_SINT;
                     if (normalized)
                         return angle::FormatID::R16_SNORM;
                     return angle::FormatID::R16_SSCALED;
                 case 2:
                     if (pureInteger)
                         return angle::FormatID::R16G16_SINT;
                     if (normalized)
                         return angle::FormatID::R16G16_SNORM;
                     return angle::FormatID::R16G16_SSCALED;
                 case 3:
                     if (pureInteger)
                         return angle::FormatID::R16G16B16_SINT;
                     if (normalized)
                         return angle::FormatID::R16G16B16_SNORM;
                     return angle::FormatID::R16G16B16_SSCALED;
                 case 4:
                     if (pureInteger)
                         return angle::FormatID::R16G16B16A16_SINT;
                     if (normalized)
                         return angle::FormatID::R16G16B16A16_SNORM;
                     return angle::FormatID::R16G16B16A16_SSCALED;
                 default:
                     UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
                     return angle::FormatID::NONE;
 #endif
             }
         case VertexAttribType::UnsignedShort:
             switch (components)
             {
                 case 1:
                     if (pureInteger)
                         return angle::FormatID::R16_UINT;
                     if (normalized)
                         return angle::FormatID::R16_UNORM;
                     return angle::FormatID::R16_USCALED;
                 case 2:
                     if (pureInteger)
                         return angle::FormatID::R16G16_UINT;
                     if (normalized)
                         return angle::FormatID::R16G16_UNORM;
                     return angle::FormatID::R16G16_USCALED;
                 case 3:
                     if (pureInteger)
                         return angle::FormatID::R16G16B16_UINT;
                     if (normalized)
                         return angle::FormatID::R16G16B16_UNORM;
                     return angle::FormatID::R16G16B16_USCALED;
                 case 4:
                     if (pureInteger)
                         return angle::FormatID::R16G16B16A16_UINT;
                     if (normalized)
                         return angle::FormatID::R16G16B16A16_UNORM;
                     return angle::FormatID::R16G16B16A16_USCALED;
                 default:
                     UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
                     return angle::FormatID::NONE;
 #endif
             }
         case VertexAttribType::Int:
             switch (components)
             {
                 case 1:
                     if (pureInteger)
                         return angle::FormatID::R32_SINT;
                     if (normalized)
                         return angle::FormatID::R32_SNORM;
                     return angle::FormatID::R32_SSCALED;
                 case 2:
                     if (pureInteger)
                         return angle::FormatID::R32G32_SINT;
                     if (normalized)
                         return angle::FormatID::R32G32_SNORM;
                     return angle::FormatID::R32G32_SSCALED;
                 case 3:
                     if (pureInteger)
                         return angle::FormatID::R32G32B32_SINT;
                     if (normalized)
                         return angle::FormatID::R32G32B32_SNORM;
                     return angle::FormatID::R32G32B32_SSCALED;
                 case 4:
                     if (pureInteger)
                         return angle::FormatID::R32G32B32A32_SINT;
                     if (normalized)
                         return angle::FormatID::R32G32B32A32_SNORM;
                     return angle::FormatID::R32G32B32A32_SSCALED;
                 default:
                     UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
                     return angle::FormatID::NONE;
 #endif
             }
         case VertexAttribType::UnsignedInt:
             switch (components)
             {
                 case 1:
                     if (pureInteger)
                         return angle::FormatID::R32_UINT;
                     if (normalized)
                         return angle::FormatID::R32_UNORM;
                     return angle::FormatID::R32_USCALED;
                 case 2:
                     if (pureInteger)
                         return angle::FormatID::R32G32_UINT;
                     if (normalized)
                         return angle::FormatID::R32G32_UNORM;
                     return angle::FormatID::R32G32_USCALED;
                 case 3:
                     if (pureInteger)
                         return angle::FormatID::R32G32B32_UINT;
                     if (normalized)
                         return angle::FormatID::R32G32B32_UNORM;
                     return angle::FormatID::R32G32B32_USCALED;
                 case 4:
                     if (pureInteger)
                         return angle::FormatID::R32G32B32A32_UINT;
                     if (normalized)
                         return angle::FormatID::R32G32B32A32_UNORM;
                     return angle::FormatID::R32G32B32A32_USCALED;
                 default:
                     UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
                     return angle::FormatID::NONE;
 #endif
             }
         case VertexAttribType::Float:
             switch (components)
             {
                 case 1:
                     return angle::FormatID::R32_FLOAT;
                 case 2:
                     return angle::FormatID::R32G32_FLOAT;
                 case 3:
                     return angle::FormatID::R32G32B32_FLOAT;
                 case 4:
                     return angle::FormatID::R32G32B32A32_FLOAT;
                 default:
                     UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
                     return angle::FormatID::NONE;
 #endif
             }
         case VertexAttribType::HalfFloat:
         case VertexAttribType::HalfFloatOES:
             switch (components)
             {
                 case 1:
                     return angle::FormatID::R16_FLOAT;
                 case 2:
                     return angle::FormatID::R16G16_FLOAT;
                 case 3:
                     return angle::FormatID::R16G16B16_FLOAT;
                 case 4:
                     return angle::FormatID::R16G16B16A16_FLOAT;
                 default:
                     UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
                     return angle::FormatID::NONE;
 #endif
             }
         case VertexAttribType::Fixed:
             switch (components)
             {
                 case 1:
                     return angle::FormatID::R32_FIXED;
                 case 2:
                     return angle::FormatID::R32G32_FIXED;
                 case 3:
                     return angle::FormatID::R32G32B32_FIXED;
                 case 4:
                     return angle::FormatID::R32G32B32A32_FIXED;
                 default:
                     UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
                     return angle::FormatID::NONE;
 #endif
             }
         case VertexAttribType::Int2101010:
             if (pureInteger)
                 return angle::FormatID::R10G10B10A2_SINT;
             if (normalized)
                 return angle::FormatID::R10G10B10A2_SNORM;
             return angle::FormatID::R10G10B10A2_SSCALED;
         case VertexAttribType::UnsignedInt2101010:
             if (pureInteger)
                 return angle::FormatID::R10G10B10A2_UINT;
             if (normalized)
                 return angle::FormatID::R10G10B10A2_UNORM;
             return angle::FormatID::R10G10B10A2_USCALED;
         case VertexAttribType::Int1010102:
             switch (components)
             {
                 case 3:
                     if (pureInteger)
                         return angle::FormatID::X2R10G10B10_SINT_VERTEX;
                     if (normalized)
                         return angle::FormatID::X2R10G10B10_SNORM_VERTEX;
                     return angle::FormatID::X2R10G10B10_SSCALED_VERTEX;
                 case 4:
                     if (pureInteger)
                         return angle::FormatID::A2R10G10B10_SINT_VERTEX;
                     if (normalized)
                         return angle::FormatID::A2R10G10B10_SNORM_VERTEX;
                     return angle::FormatID::A2R10G10B10_SSCALED_VERTEX;
                 default:
                     UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
                     return angle::FormatID::NONE;
 #endif
             }
         case VertexAttribType::UnsignedInt1010102:
             switch (components)
             {
                 case 3:
                     if (pureInteger)
                         return angle::FormatID::X2R10G10B10_UINT_VERTEX;
                     if (normalized)
                         return angle::FormatID::X2R10G10B10_UNORM_VERTEX;
                     return angle::FormatID::X2R10G10B10_USCALED_VERTEX;

                 case 4:
                     if (pureInteger)
                         return angle::FormatID::A2R10G10B10_UINT_VERTEX;
                     if (normalized)
                         return angle::FormatID::A2R10G10B10_UNORM_VERTEX;
                     return angle::FormatID::A2R10G10B10_USCALED_VERTEX;
                 default:
                     UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
                     return angle::FormatID::NONE;
 #endif
             }
         default:
             UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
             return angle::FormatID::NONE;
 #endif
     }
 }

 angle::FormatID GetVertexFormatID(const VertexAttribute &attrib, VertexAttribType currentValueType)
 {
     if (!attrib.enabled)
     {
         return GetCurrentValueFormatID(currentValueType);
     }
     return attrib.format->id;
 }

 angle::FormatID GetCurrentValueFormatID(VertexAttribType currentValueType)
 {
     switch (currentValueType)
     {
         case VertexAttribType::Float:
             return angle::FormatID::R32G32B32A32_FLOAT;
         case VertexAttribType::Int:
             return angle::FormatID::R32G32B32A32_SINT;
         case VertexAttribType::UnsignedInt:
             return angle::FormatID::R32G32B32A32_UINT;
         default:
             UNREACHABLE();
             return angle::FormatID::NONE;
     }
 }

 const VertexFormat &GetVertexFormatFromID(angle::FormatID vertexFormatID)
 {
     switch (vertexFormatID)
     {
         case angle::FormatID::R8_SSCALED:
         {
             static const VertexFormat format(GL_BYTE, GL_FALSE, 1, false);
             return format;
         }
         case angle::FormatID::R8_SNORM:
         {
             static const VertexFormat format(GL_BYTE, GL_TRUE, 1, false);
             return format;
         }
         case angle::FormatID::R8G8_SSCALED:
         {
             static const VertexFormat format(GL_BYTE, GL_FALSE, 2, false);
             return format;
         }
         case angle::FormatID::R8G8_SNORM:
         {
             static const VertexFormat format(GL_BYTE, GL_TRUE, 2, false);
             return format;
         }
         case angle::FormatID::R8G8B8_SSCALED:
         {
             static const VertexFormat format(GL_BYTE, GL_FALSE, 3, false);
             return format;
         }
         case angle::FormatID::R8G8B8_SNORM:
         {
             static const VertexFormat format(GL_BYTE, GL_TRUE, 3, false);
             return format;
         }
         case angle::FormatID::R8G8B8A8_SSCALED:
         {
             static const VertexFormat format(GL_BYTE, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::R8G8B8A8_SNORM:
         {
             static const VertexFormat format(GL_BYTE, GL_TRUE, 4, false);
             return format;
         }
         case angle::FormatID::R8_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 1, false);
             return format;
         }
         case angle::FormatID::R8_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_BYTE, GL_TRUE, 1, false);
             return format;
         }
         case angle::FormatID::R8G8_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 2, false);
             return format;
         }
         case angle::FormatID::R8G8_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_BYTE, GL_TRUE, 2, false);
             return format;
         }
         case angle::FormatID::R8G8B8_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 3, false);
             return format;
         }
         case angle::FormatID::R8G8B8_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_BYTE, GL_TRUE, 3, false);
             return format;
         }
         case angle::FormatID::R8G8B8A8_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::R8G8B8A8_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_BYTE, GL_TRUE, 4, false);
             return format;
         }
         case angle::FormatID::R16_SSCALED:
         {
             static const VertexFormat format(GL_SHORT, GL_FALSE, 1, false);
             return format;
         }
         case angle::FormatID::R16_SNORM:
         {
             static const VertexFormat format(GL_SHORT, GL_TRUE, 1, false);
             return format;
         }
         case angle::FormatID::R16G16_SSCALED:
         {
             static const VertexFormat format(GL_SHORT, GL_FALSE, 2, false);
             return format;
         }
         case angle::FormatID::R16G16_SNORM:
         {
             static const VertexFormat format(GL_SHORT, GL_TRUE, 2, false);
             return format;
         }
         case angle::FormatID::R16G16B16_SSCALED:
         {
             static const VertexFormat format(GL_SHORT, GL_FALSE, 3, false);
             return format;
         }
         case angle::FormatID::R16G16B16_SNORM:
         {
             static const VertexFormat format(GL_SHORT, GL_TRUE, 3, false);
             return format;
         }
         case angle::FormatID::R16G16B16A16_SSCALED:
         {
             static const VertexFormat format(GL_SHORT, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::R16G16B16A16_SNORM:
         {
             static const VertexFormat format(GL_SHORT, GL_TRUE, 4, false);
             return format;
         }
         case angle::FormatID::R16_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 1, false);
             return format;
         }
         case angle::FormatID::R16_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_SHORT, GL_TRUE, 1, false);
             return format;
         }
         case angle::FormatID::R16G16_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 2, false);
             return format;
         }
         case angle::FormatID::R16G16_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_SHORT, GL_TRUE, 2, false);
             return format;
         }
         case angle::FormatID::R16G16B16_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 3, false);
             return format;
         }
         case angle::FormatID::R16G16B16_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_SHORT, GL_TRUE, 3, false);
             return format;
         }
         case angle::FormatID::R16G16B16A16_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::R16G16B16A16_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_SHORT, GL_TRUE, 4, false);
             return format;
         }
         case angle::FormatID::R32_SSCALED:
         {
             static const VertexFormat format(GL_INT, GL_FALSE, 1, false);
             return format;
         }
         case angle::FormatID::R32_SNORM:
         {
             static const VertexFormat format(GL_INT, GL_TRUE, 1, false);
             return format;
         }
         case angle::FormatID::R32G32_SSCALED:
         {
             static const VertexFormat format(GL_INT, GL_FALSE, 2, false);
             return format;
         }
         case angle::FormatID::R32G32_SNORM:
         {
             static const VertexFormat format(GL_INT, GL_TRUE, 2, false);
             return format;
         }
         case angle::FormatID::R32G32B32_SSCALED:
         {
             static const VertexFormat format(GL_INT, GL_FALSE, 3, false);
             return format;
         }
         case angle::FormatID::R32G32B32_SNORM:
         {
             static const VertexFormat format(GL_INT, GL_TRUE, 3, false);
             return format;
         }
         case angle::FormatID::R32G32B32A32_SSCALED:
         {
             static const VertexFormat format(GL_INT, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::R32G32B32A32_SNORM:
         {
             static const VertexFormat format(GL_INT, GL_TRUE, 4, false);
             return format;
         }
         case angle::FormatID::R32_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 1, false);
             return format;
         }
         case angle::FormatID::R32_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_INT, GL_TRUE, 1, false);
             return format;
         }
         case angle::FormatID::R32G32_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 2, false);
             return format;
         }
         case angle::FormatID::R32G32_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_INT, GL_TRUE, 2, false);
             return format;
         }
         case angle::FormatID::R32G32B32_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 3, false);
             return format;
         }
         case angle::FormatID::R32G32B32_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_INT, GL_TRUE, 3, false);
             return format;
         }
         case angle::FormatID::R32G32B32A32_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::R32G32B32A32_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_INT, GL_TRUE, 4, false);
             return format;
         }
         case angle::FormatID::R8_SINT:
         {
             static const VertexFormat format(GL_BYTE, GL_FALSE, 1, true);
             return format;
         }
         case angle::FormatID::R8G8_SINT:
         {
             static const VertexFormat format(GL_BYTE, GL_FALSE, 2, true);
             return format;
         }
         case angle::FormatID::R8G8B8_SINT:
         {
             static const VertexFormat format(GL_BYTE, GL_FALSE, 3, true);
             return format;
         }
         case angle::FormatID::R8G8B8A8_SINT:
         {
             static const VertexFormat format(GL_BYTE, GL_FALSE, 4, true);
             return format;
         }
         case angle::FormatID::R8_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 1, true);
             return format;
         }
         case angle::FormatID::R8G8_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 2, true);
             return format;
         }
         case angle::FormatID::R8G8B8_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 3, true);
             return format;
         }
         case angle::FormatID::R8G8B8A8_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_BYTE, GL_FALSE, 4, true);
             return format;
         }
         case angle::FormatID::R16_SINT:
         {
             static const VertexFormat format(GL_SHORT, GL_FALSE, 1, true);
             return format;
         }
         case angle::FormatID::R16G16_SINT:
         {
             static const VertexFormat format(GL_SHORT, GL_FALSE, 2, true);
             return format;
         }
         case angle::FormatID::R16G16B16_SINT:
         {
             static const VertexFormat format(GL_SHORT, GL_FALSE, 3, true);
             return format;
         }
         case angle::FormatID::R16G16B16A16_SINT:
         {
             static const VertexFormat format(GL_SHORT, GL_FALSE, 4, true);
             return format;
         }
         case angle::FormatID::R16_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 1, true);
             return format;
         }
         case angle::FormatID::R16G16_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 2, true);
             return format;
         }
         case angle::FormatID::R16G16B16_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 3, true);
             return format;
         }
         case angle::FormatID::R16G16B16A16_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_SHORT, GL_FALSE, 4, true);
             return format;
         }
         case angle::FormatID::R32_SINT:
         {
             static const VertexFormat format(GL_INT, GL_FALSE, 1, true);
             return format;
         }
         case angle::FormatID::R32G32_SINT:
         {
             static const VertexFormat format(GL_INT, GL_FALSE, 2, true);
             return format;
         }
         case angle::FormatID::R32G32B32_SINT:
         {
             static const VertexFormat format(GL_INT, GL_FALSE, 3, true);
             return format;
         }
         case angle::FormatID::R32G32B32A32_SINT:
         {
             static const VertexFormat format(GL_INT, GL_FALSE, 4, true);
             return format;
         }
         case angle::FormatID::R32_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 1, true);
             return format;
         }
         case angle::FormatID::R32G32_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 2, true);
             return format;
         }
         case angle::FormatID::R32G32B32_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 3, true);
             return format;
         }
         case angle::FormatID::R32G32B32A32_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_INT, GL_FALSE, 4, true);
             return format;
         }
         case angle::FormatID::R32_FIXED:
         {
             static const VertexFormat format(GL_FIXED, GL_FALSE, 1, false);
             return format;
         }
         case angle::FormatID::R32G32_FIXED:
         {
             static const VertexFormat format(GL_FIXED, GL_FALSE, 2, false);
             return format;
         }
         case angle::FormatID::R32G32B32_FIXED:
         {
             static const VertexFormat format(GL_FIXED, GL_FALSE, 3, false);
             return format;
         }
         case angle::FormatID::R32G32B32A32_FIXED:
         {
             static const VertexFormat format(GL_FIXED, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::R16_FLOAT:
         {
             static const VertexFormat format(GL_HALF_FLOAT, GL_FALSE, 1, false);
             return format;
         }
         case angle::FormatID::R16G16_FLOAT:
         {
             static const VertexFormat format(GL_HALF_FLOAT, GL_FALSE, 2, false);
             return format;
         }
         case angle::FormatID::R16G16B16_FLOAT:
         {
             static const VertexFormat format(GL_HALF_FLOAT, GL_FALSE, 3, false);
             return format;
         }
         case angle::FormatID::R16G16B16A16_FLOAT:
         {
             static const VertexFormat format(GL_HALF_FLOAT, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::R32_FLOAT:
         {
             static const VertexFormat format(GL_FLOAT, GL_FALSE, 1, false);
             return format;
         }
         case angle::FormatID::R32G32_FLOAT:
         {
             static const VertexFormat format(GL_FLOAT, GL_FALSE, 2, false);
             return format;
         }
         case angle::FormatID::R32G32B32_FLOAT:
         {
             static const VertexFormat format(GL_FLOAT, GL_FALSE, 3, false);
             return format;
         }
         case angle::FormatID::R32G32B32A32_FLOAT:
         {
             static const VertexFormat format(GL_FLOAT, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::R10G10B10A2_SSCALED:
         {
             static const VertexFormat format(GL_INT_2_10_10_10_REV, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::R10G10B10A2_USCALED:
         {
             static const VertexFormat format(GL_UNSIGNED_INT_2_10_10_10_REV, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::R10G10B10A2_SNORM:
         {
             static const VertexFormat format(GL_INT_2_10_10_10_REV, GL_TRUE, 4, false);
             return format;
         }
         case angle::FormatID::R10G10B10A2_UNORM:
         {
             static const VertexFormat format(GL_UNSIGNED_INT_2_10_10_10_REV, GL_TRUE, 4, false);
             return format;
         }
         case angle::FormatID::R10G10B10A2_SINT:
         {
             static const VertexFormat format(GL_INT_2_10_10_10_REV, GL_FALSE, 4, true);
             return format;
         }
         case angle::FormatID::R10G10B10A2_UINT:
         {
             static const VertexFormat format(GL_UNSIGNED_INT_2_10_10_10_REV, GL_FALSE, 4, true);
             return format;
         }
         case angle::FormatID::A2R10G10B10_SSCALED_VERTEX:
         {
             static const VertexFormat format(GL_INT_10_10_10_2_OES, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::A2R10G10B10_USCALED_VERTEX:
         {
             static const VertexFormat format(GL_UNSIGNED_INT_10_10_10_2_OES, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::A2R10G10B10_SNORM_VERTEX:
         {
             static const VertexFormat format(GL_INT_10_10_10_2_OES, GL_TRUE, 4, false);
             return format;
         }
         case angle::FormatID::A2R10G10B10_UNORM_VERTEX:
         {
             static const VertexFormat format(GL_UNSIGNED_INT_10_10_10_2_OES, GL_TRUE, 4, false);
             return format;
         }
         case angle::FormatID::A2R10G10B10_SINT_VERTEX:
         {
             static const VertexFormat format(GL_INT_10_10_10_2_OES, GL_FALSE, 4, true);
             return format;
         }
         case angle::FormatID::A2R10G10B10_UINT_VERTEX:
         {
             static const VertexFormat format(GL_UNSIGNED_INT_10_10_10_2_OES, GL_FALSE, 4, true);
             return format;
         }
         case angle::FormatID::X2R10G10B10_SSCALED_VERTEX:
         {
             static const VertexFormat format(GL_INT_10_10_10_2_OES, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::X2R10G10B10_USCALED_VERTEX:
         {
             static const VertexFormat format(GL_UNSIGNED_INT_10_10_10_2_OES, GL_FALSE, 4, false);
             return format;
         }
         case angle::FormatID::X2R10G10B10_SNORM_VERTEX:
         {
             static const VertexFormat format(GL_INT_10_10_10_2_OES, GL_TRUE, 4, false);
             return format;
         }
         case angle::FormatID::X2R10G10B10_UNORM_VERTEX:
         {
             static const VertexFormat format(GL_UNSIGNED_INT_10_10_10_2_OES, GL_TRUE, 4, false);
             return format;
         }
         case angle::FormatID::X2R10G10B10_SINT_VERTEX:
         {
             static const VertexFormat format(GL_INT_10_10_10_2_OES, GL_FALSE, 4, true);
             return format;
         }
         default:
         {
             static const VertexFormat format(GL_NONE, GL_FALSE, 0, false);
             return format;
         }
     }
 }

 size_t GetVertexFormatSize(angle::FormatID vertexFormatID)
 {
     switch (vertexFormatID)
     {
         case angle::FormatID::R8_SSCALED:
         case angle::FormatID::R8_SNORM:
         case angle::FormatID::R8_USCALED:
         case angle::FormatID::R8_UNORM:
         case angle::FormatID::R8_SINT:
         case angle::FormatID::R8_UINT:
             return 1;

         case angle::FormatID::R8G8_SSCALED:
         case angle::FormatID::R8G8_SNORM:
         case angle::FormatID::R8G8_USCALED:
         case angle::FormatID::R8G8_UNORM:
         case angle::FormatID::R8G8_SINT:
         case angle::FormatID::R8G8_UINT:
         case angle::FormatID::R16_SSCALED:
         case angle::FormatID::R16_SNORM:
         case angle::FormatID::R16_USCALED:
         case angle::FormatID::R16_UNORM:
         case angle::FormatID::R16_SINT:
         case angle::FormatID::R16_UINT:
         case angle::FormatID::R16_FLOAT:
             return 2;

         case angle::FormatID::R8G8B8_SSCALED:
         case angle::FormatID::R8G8B8_SNORM:
         case angle::FormatID::R8G8B8_USCALED:
         case angle::FormatID::R8G8B8_UNORM:
         case angle::FormatID::R8G8B8_SINT:
         case angle::FormatID::R8G8B8_UINT:
             return 3;

         case angle::FormatID::R8G8B8A8_SSCALED:
         case angle::FormatID::R8G8B8A8_SNORM:
         case angle::FormatID::R8G8B8A8_USCALED:
         case angle::FormatID::R8G8B8A8_UNORM:
         case angle::FormatID::R8G8B8A8_SINT:
         case angle::FormatID::R8G8B8A8_UINT:
         case angle::FormatID::R16G16_SSCALED:
         case angle::FormatID::R16G16_SNORM:
         case angle::FormatID::R16G16_USCALED:
         case angle::FormatID::R16G16_UNORM:
         case angle::FormatID::R16G16_SINT:
         case angle::FormatID::R16G16_UINT:
         case angle::FormatID::R32_SSCALED:
         case angle::FormatID::R32_SNORM:
         case angle::FormatID::R32_USCALED:
         case angle::FormatID::R32_UNORM:
         case angle::FormatID::R32_SINT:
         case angle::FormatID::R32_UINT:
         case angle::FormatID::R16G16_FLOAT:
         case angle::FormatID::R32_FIXED:
         case angle::FormatID::R32_FLOAT:
         case angle::FormatID::R10G10B10A2_SSCALED:
         case angle::FormatID::R10G10B10A2_USCALED:
         case angle::FormatID::R10G10B10A2_SNORM:
         case angle::FormatID::R10G10B10A2_UNORM:
         case angle::FormatID::R10G10B10A2_SINT:
         case angle::FormatID::R10G10B10A2_UINT:
         case angle::FormatID::A2R10G10B10_SSCALED_VERTEX:
         case angle::FormatID::A2R10G10B10_USCALED_VERTEX:
         case angle::FormatID::A2R10G10B10_SINT_VERTEX:
         case angle::FormatID::A2R10G10B10_UINT_VERTEX:
         case angle::FormatID::A2R10G10B10_SNORM_VERTEX:
         case angle::FormatID::A2R10G10B10_UNORM_VERTEX:
         case angle::FormatID::X2R10G10B10_SSCALED_VERTEX:
         case angle::FormatID::X2R10G10B10_USCALED_VERTEX:
         case angle::FormatID::X2R10G10B10_SINT_VERTEX:
         case angle::FormatID::X2R10G10B10_UINT_VERTEX:
         case angle::FormatID::X2R10G10B10_SNORM_VERTEX:
         case angle::FormatID::X2R10G10B10_UNORM_VERTEX:
             return 4;

         case angle::FormatID::R16G16B16_SSCALED:
         case angle::FormatID::R16G16B16_SNORM:
         case angle::FormatID::R16G16B16_USCALED:
         case angle::FormatID::R16G16B16_UNORM:
         case angle::FormatID::R16G16B16_SINT:
         case angle::FormatID::R16G16B16_UINT:
         case angle::FormatID::R16G16B16_FLOAT:
             return 6;

         case angle::FormatID::R16G16B16A16_SSCALED:
         case angle::FormatID::R16G16B16A16_SNORM:
         case angle::FormatID::R16G16B16A16_USCALED:
         case angle::FormatID::R16G16B16A16_UNORM:
         case angle::FormatID::R16G16B16A16_SINT:
         case angle::FormatID::R16G16B16A16_UINT:
         case angle::FormatID::R32G32_SSCALED:
         case angle::FormatID::R32G32_SNORM:
         case angle::FormatID::R32G32_USCALED:
         case angle::FormatID::R32G32_UNORM:
         case angle::FormatID::R32G32_SINT:
         case angle::FormatID::R32G32_UINT:
         case angle::FormatID::R16G16B16A16_FLOAT:
         case angle::FormatID::R32G32_FIXED:
         case angle::FormatID::R32G32_FLOAT:
             return 8;

         case angle::FormatID::R32G32B32_SSCALED:
         case angle::FormatID::R32G32B32_SNORM:
         case angle::FormatID::R32G32B32_USCALED:
         case angle::FormatID::R32G32B32_UNORM:
         case angle::FormatID::R32G32B32_SINT:
         case angle::FormatID::R32G32B32_UINT:
         case angle::FormatID::R32G32B32_FIXED:
         case angle::FormatID::R32G32B32_FLOAT:
             return 12;

         case angle::FormatID::R32G32B32A32_SSCALED:
         case angle::FormatID::R32G32B32A32_SNORM:
         case angle::FormatID::R32G32B32A32_USCALED:
         case angle::FormatID::R32G32B32A32_UNORM:
         case angle::FormatID::R32G32B32A32_SINT:
         case angle::FormatID::R32G32B32A32_UINT:
         case angle::FormatID::R32G32B32A32_FIXED:
         case angle::FormatID::R32G32B32A32_FLOAT:
             return 16;

         case angle::FormatID::NONE:
         default:
             UNREACHABLE();
 #if !UNREACHABLE_IS_NORETURN
             return 0;
 #endif
     }
 }

 bool ValidES3InternalFormat(GLenum internalFormat)
 {
     const InternalFormatInfoMap &formatMap = GetInternalFormatMap();
     return internalFormat != GL_NONE && formatMap.find(internalFormat) != formatMap.end();
 }

 VertexFormat::VertexFormat(GLenum typeIn,
                            GLboolean normalizedIn,
                            GLuint componentsIn,
                            bool pureIntegerIn)
     : type(typeIn), normalized(normalizedIn), components(componentsIn), pureInteger(pureIntegerIn)
 {
     // float -> !normalized
     ASSERT(!(type == GL_FLOAT || type == GL_HALF_FLOAT || type == GL_FIXED) ||
            normalized == GL_FALSE);
 }
 }  // namespace gl