bsalomon@google.com | f7fa806 | 2012-02-14 14:09:57 +0000 | [diff] [blame^] | 1 | |
| 2 | /* |
| 3 | * Copyright 2012 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
| 8 | |
| 9 | |
| 10 | #include "GrGLCaps.h" |
| 11 | #include "GrGLContextInfo.h" |
| 12 | |
| 13 | GrGLCaps::GrGLCaps() { |
| 14 | this->reset(); |
| 15 | } |
| 16 | |
| 17 | void GrGLCaps::reset() { |
| 18 | fVerifiedColorConfigs.reset(); |
| 19 | fStencilFormats.reset(); |
| 20 | fStencilVerifiedColorConfigs.reset(); |
| 21 | fMSFBOType = kNone_MSFBOType; |
| 22 | fMaxFragmentUniformVectors = 0; |
| 23 | fRGBA8RenderbufferSupport = false; |
| 24 | fBGRAFormatSupport = false; |
| 25 | fBGRAIsInternalFormat = false; |
| 26 | fTextureSwizzleSupport = false; |
| 27 | fUnpackRowLengthSupport = false; |
| 28 | fUnpackFlipYSupport = false; |
| 29 | fPackRowLengthSupport = false; |
| 30 | fPackFlipYSupport = false; |
| 31 | fTextureUsageSupport = false; |
| 32 | fTexStorageSupport = false; |
| 33 | } |
| 34 | |
| 35 | GrGLCaps::GrGLCaps(const GrGLCaps& caps) { |
| 36 | *this = caps; |
| 37 | } |
| 38 | |
| 39 | GrGLCaps& GrGLCaps::operator = (const GrGLCaps& caps) { |
| 40 | fVerifiedColorConfigs = caps.fVerifiedColorConfigs; |
| 41 | fStencilFormats = caps.fStencilFormats; |
| 42 | fStencilVerifiedColorConfigs = caps.fStencilVerifiedColorConfigs; |
| 43 | fMaxFragmentUniformVectors = caps.fMaxFragmentUniformVectors; |
| 44 | fMSFBOType = caps.fMSFBOType; |
| 45 | fRGBA8RenderbufferSupport = caps.fRGBA8RenderbufferSupport; |
| 46 | fBGRAFormatSupport = caps.fBGRAFormatSupport; |
| 47 | fBGRAIsInternalFormat = caps.fBGRAIsInternalFormat; |
| 48 | fTextureSwizzleSupport = caps.fTextureSwizzleSupport; |
| 49 | fUnpackRowLengthSupport = caps.fUnpackRowLengthSupport; |
| 50 | fUnpackFlipYSupport = caps.fUnpackFlipYSupport; |
| 51 | fPackRowLengthSupport = caps.fPackRowLengthSupport; |
| 52 | fPackFlipYSupport = caps.fPackFlipYSupport; |
| 53 | fTextureUsageSupport = caps.fTextureUsageSupport; |
| 54 | fTexStorageSupport = caps.fTexStorageSupport; |
| 55 | |
| 56 | return *this; |
| 57 | } |
| 58 | |
| 59 | void GrGLCaps::init(const GrGLContextInfo& ctxInfo) { |
| 60 | |
| 61 | this->reset(); |
| 62 | if (!ctxInfo.isInitialized()) { |
| 63 | return; |
| 64 | } |
| 65 | |
| 66 | const GrGLInterface* gli = ctxInfo.interface(); |
| 67 | GrGLBinding binding = ctxInfo.binding(); |
| 68 | GrGLVersion version = ctxInfo.version(); |
| 69 | |
| 70 | if (kES2_GrGLBinding == binding) { |
| 71 | GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS, |
| 72 | &fMaxFragmentUniformVectors); |
| 73 | } else { |
| 74 | GrAssert(kDesktop_GrGLBinding == binding); |
| 75 | GrGLint max; |
| 76 | GR_GL_GetIntegerv(gli, GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &max); |
| 77 | fMaxFragmentUniformVectors = max / 4; |
| 78 | } |
| 79 | |
| 80 | if (kDesktop_GrGLBinding == binding) { |
| 81 | fRGBA8RenderbufferSupport = true; |
| 82 | } else { |
| 83 | fRGBA8RenderbufferSupport = ctxInfo.hasExtension("GL_OES_rgb8_rgba8") || |
| 84 | ctxInfo.hasExtension("GL_ARM_rgba8"); |
| 85 | } |
| 86 | |
| 87 | if (kDesktop_GrGLBinding == binding) { |
| 88 | fBGRAFormatSupport = version >= GR_GL_VER(1,2) || |
| 89 | ctxInfo.hasExtension("GL_EXT_bgra"); |
| 90 | } else { |
| 91 | bool hasBGRAExt = false; |
| 92 | if (ctxInfo.hasExtension("GL_APPLE_texture_format_BGRA8888")) { |
| 93 | fBGRAFormatSupport = true; |
| 94 | } else if (ctxInfo.hasExtension("GL_EXT_texture_format_BGRA8888")) { |
| 95 | fBGRAFormatSupport = true; |
| 96 | fBGRAIsInternalFormat = true; |
| 97 | } |
| 98 | GrAssert(fBGRAFormatSupport || |
| 99 | kSkia8888_PM_GrPixelConfig != kBGRA_8888_PM_GrPixelConfig); |
| 100 | } |
| 101 | |
| 102 | if (kDesktop_GrGLBinding == binding) { |
| 103 | fTextureSwizzleSupport = version >= GR_GL_VER(3,3) || |
| 104 | ctxInfo.hasExtension("GL_ARB_texture_swizzle"); |
| 105 | } else { |
| 106 | fTextureSwizzleSupport = false; |
| 107 | } |
| 108 | |
| 109 | if (kDesktop_GrGLBinding == binding) { |
| 110 | fUnpackRowLengthSupport = true; |
| 111 | fUnpackFlipYSupport = false; |
| 112 | fPackRowLengthSupport = true; |
| 113 | fPackFlipYSupport = false; |
| 114 | } else { |
| 115 | fUnpackRowLengthSupport =ctxInfo.hasExtension("GL_EXT_unpack_subimage"); |
| 116 | fUnpackFlipYSupport = ctxInfo.hasExtension("GL_CHROMIUM_flipy"); |
| 117 | // no extension for pack row length |
| 118 | fPackRowLengthSupport = false; |
| 119 | fPackFlipYSupport = |
| 120 | ctxInfo.hasExtension("GL_ANGLE_pack_reverse_row_order"); |
| 121 | } |
| 122 | |
| 123 | fTextureUsageSupport = (kES2_GrGLBinding == binding) && |
| 124 | ctxInfo.hasExtension("GL_ANGLE_texture_usage"); |
| 125 | |
| 126 | // Tex storage is in desktop 4.2 and can be an extension to desktop or ES. |
| 127 | fTexStorageSupport = (kDesktop_GrGLBinding == binding && |
| 128 | version >= GR_GL_VER(4,2)) || |
| 129 | ctxInfo.hasExtension("GL_ARB_texture_storage") || |
| 130 | ctxInfo.hasExtension("GL_EXT_texture_storage"); |
| 131 | |
| 132 | this->initFSAASupport(ctxInfo); |
| 133 | this->initStencilFormats(ctxInfo); |
| 134 | } |
| 135 | |
| 136 | void GrGLCaps::initFSAASupport(const GrGLContextInfo& ctxInfo) { |
| 137 | |
| 138 | fMSFBOType = kNone_MSFBOType; |
| 139 | if (kDesktop_GrGLBinding != ctxInfo.binding()) { |
| 140 | if (ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_multisample")) { |
| 141 | // chrome's extension is equivalent to the EXT msaa |
| 142 | // and fbo_blit extensions. |
| 143 | fMSFBOType = kDesktopEXT_MSFBOType; |
| 144 | } else if (ctxInfo.hasExtension("GL_APPLE_framebuffer_multisample")) { |
| 145 | fMSFBOType = kAppleES_MSFBOType; |
| 146 | } |
| 147 | } else { |
| 148 | if ((ctxInfo.version() >= GR_GL_VER(3,0)) || |
| 149 | ctxInfo.hasExtension("GL_ARB_framebuffer_object")) { |
| 150 | fMSFBOType = GrGLCaps::kDesktopARB_MSFBOType; |
| 151 | } else if (ctxInfo.hasExtension("GL_EXT_framebuffer_multisample") && |
| 152 | ctxInfo.hasExtension("GL_EXT_framebuffer_blit")) { |
| 153 | fMSFBOType = GrGLCaps::kDesktopEXT_MSFBOType; |
| 154 | } |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | namespace { |
| 159 | const GrGLuint kUnknownBitCount = GrGLStencilBuffer::kUnknownBitCount; |
| 160 | } |
| 161 | |
| 162 | void GrGLCaps::initStencilFormats(const GrGLContextInfo& ctxInfo) { |
| 163 | |
| 164 | // Build up list of legal stencil formats (though perhaps not supported on |
| 165 | // the particular gpu/driver) from most preferred to least. |
| 166 | |
| 167 | // these consts are in order of most preferred to least preferred |
| 168 | // we don't bother with GL_STENCIL_INDEX1 or GL_DEPTH32F_STENCIL8 |
| 169 | |
| 170 | static const StencilFormat |
| 171 | // internal Format stencil bits total bits packed? |
| 172 | gS8 = {GR_GL_STENCIL_INDEX8, 8, 8, false}, |
| 173 | gS16 = {GR_GL_STENCIL_INDEX16, 16, 16, false}, |
| 174 | gD24S8 = {GR_GL_DEPTH24_STENCIL8, 8, 32, true }, |
| 175 | gS4 = {GR_GL_STENCIL_INDEX4, 4, 4, false}, |
| 176 | gS = {GR_GL_STENCIL_INDEX, kUnknownBitCount, kUnknownBitCount, false}, |
| 177 | gDS = {GR_GL_DEPTH_STENCIL, kUnknownBitCount, kUnknownBitCount, true }; |
| 178 | |
| 179 | if (kDesktop_GrGLBinding == ctxInfo.binding()) { |
| 180 | bool supportsPackedDS = |
| 181 | ctxInfo.version() >= GR_GL_VER(3,0) || |
| 182 | ctxInfo.hasExtension("GL_EXT_packed_depth_stencil") || |
| 183 | ctxInfo.hasExtension("GL_ARB_framebuffer_object"); |
| 184 | |
| 185 | // S1 thru S16 formats are in GL 3.0+, EXT_FBO, and ARB_FBO since we |
| 186 | // require FBO support we can expect these are legal formats and don't |
| 187 | // check. These also all support the unsized GL_STENCIL_INDEX. |
| 188 | fStencilFormats.push_back() = gS8; |
| 189 | fStencilFormats.push_back() = gS16; |
| 190 | if (supportsPackedDS) { |
| 191 | fStencilFormats.push_back() = gD24S8; |
| 192 | } |
| 193 | fStencilFormats.push_back() = gS4; |
| 194 | if (supportsPackedDS) { |
| 195 | fStencilFormats.push_back() = gDS; |
| 196 | } |
| 197 | } else { |
| 198 | // ES2 has STENCIL_INDEX8 without extensions but requires extensions |
| 199 | // for other formats. |
| 200 | // ES doesn't support using the unsized format. |
| 201 | |
| 202 | fStencilFormats.push_back() = gS8; |
| 203 | //fStencilFormats.push_back() = gS16; |
| 204 | if (ctxInfo.hasExtension("GL_OES_packed_depth_stencil")) { |
| 205 | fStencilFormats.push_back() = gD24S8; |
| 206 | } |
| 207 | if (ctxInfo.hasExtension("GL_OES_stencil4")) { |
| 208 | fStencilFormats.push_back() = gS4; |
| 209 | } |
| 210 | } |
| 211 | GrAssert(0 == fStencilVerifiedColorConfigs.count()); |
| 212 | fStencilVerifiedColorConfigs.push_back_n(fStencilFormats.count()); |
| 213 | } |
| 214 | |
| 215 | void GrGLCaps::markColorConfigAndStencilFormatAsVerified( |
| 216 | GrPixelConfig config, |
| 217 | const GrGLStencilBuffer::Format& format) { |
| 218 | #if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT |
| 219 | return; |
| 220 | #endif |
| 221 | GrAssert((unsigned)config < kGrPixelConfigCount); |
| 222 | GrAssert(fStencilFormats.count() == fStencilVerifiedColorConfigs.count()); |
| 223 | int count = fStencilFormats.count(); |
| 224 | // we expect a really small number of possible formats so linear search |
| 225 | // should be OK |
| 226 | GrAssert(count < 16); |
| 227 | for (int i = 0; i < count; ++i) { |
| 228 | if (format.fInternalFormat == |
| 229 | fStencilFormats[i].fInternalFormat) { |
| 230 | fStencilVerifiedColorConfigs[i].markVerified(config); |
| 231 | return; |
| 232 | } |
| 233 | } |
| 234 | GrCrash("Why are we seeing a stencil format that " |
| 235 | "GrGLCaps doesn't know about."); |
| 236 | } |
| 237 | |
| 238 | bool GrGLCaps::isColorConfigAndStencilFormatVerified( |
| 239 | GrPixelConfig config, |
| 240 | const GrGLStencilBuffer::Format& format) const { |
| 241 | #if !GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT |
| 242 | return false; |
| 243 | #endif |
| 244 | GrAssert((unsigned)config < kGrPixelConfigCount); |
| 245 | int count = fStencilFormats.count(); |
| 246 | // we expect a really small number of possible formats so linear search |
| 247 | // should be OK |
| 248 | GrAssert(count < 16); |
| 249 | for (int i = 0; i < count; ++i) { |
| 250 | if (format.fInternalFormat == |
| 251 | fStencilFormats[i].fInternalFormat) { |
| 252 | return fStencilVerifiedColorConfigs[i].isVerified(config); |
| 253 | } |
| 254 | } |
| 255 | GrCrash("Why are we seeing a stencil format that " |
| 256 | "GLCaps doesn't know about."); |
| 257 | return false; |
| 258 | } |
| 259 | |
| 260 | void GrGLCaps::print() const { |
| 261 | for (int i = 0; i < fStencilFormats.count(); ++i) { |
| 262 | GrPrintf("Stencil Format %d, stencil bits: %02d, total bits: %02d\n", |
| 263 | i, |
| 264 | fStencilFormats[i].fStencilBits, |
| 265 | fStencilFormats[i].fTotalBits); |
| 266 | } |
| 267 | |
| 268 | GR_STATIC_ASSERT(0 == kNone_MSFBOType); |
| 269 | GR_STATIC_ASSERT(1 == kDesktopARB_MSFBOType); |
| 270 | GR_STATIC_ASSERT(2 == kDesktopEXT_MSFBOType); |
| 271 | GR_STATIC_ASSERT(3 == kAppleES_MSFBOType); |
| 272 | static const char* gMSFBOExtStr[] = { |
| 273 | "None", |
| 274 | "ARB", |
| 275 | "EXT", |
| 276 | "Apple", |
| 277 | }; |
| 278 | GrPrintf("MSAA Type: %s\n", gMSFBOExtStr[fMSFBOType]); |
| 279 | GrPrintf("Max FS Uniform Vectors: %d\n", fMaxFragmentUniformVectors); |
| 280 | GrPrintf("Support RGBA8 Render Buffer: %s\n", |
| 281 | (fRGBA8RenderbufferSupport ? "YES": "NO")); |
| 282 | GrPrintf("BGRA is an internal format: %s\n", |
| 283 | (fBGRAIsInternalFormat ? "YES": "NO")); |
| 284 | GrPrintf("Support texture swizzle: %s\n", |
| 285 | (fTextureSwizzleSupport ? "YES": "NO")); |
| 286 | GrPrintf("Unpack Row length support: %s\n", |
| 287 | (fUnpackRowLengthSupport ? "YES": "NO")); |
| 288 | GrPrintf("Unpack Flip Y support: %s\n", |
| 289 | (fUnpackFlipYSupport ? "YES": "NO")); |
| 290 | GrPrintf("Pack Row length support: %s\n", |
| 291 | (fPackRowLengthSupport ? "YES": "NO")); |
| 292 | GrPrintf("Pack Flip Y support: %s\n", |
| 293 | (fPackFlipYSupport ? "YES": "NO")); |
| 294 | } |
| 295 | |