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gerrit-public.fairphone.software / platform / external / mesa3d / 5edd9961c15a80d557ba42f48c97a471b23d9c5e / . / src / mesa / main / glformats.c
blob: 7dab33c0051184bc11d3d923b06f9b4725faff57 [file] [log] [blame]
/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
* Copyright (c) 2008-2009 VMware, Inc.
* Copyright (c) 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include "context.h"
#include "glformats.h"
#include "formats.h"
#include "texcompress.h"
#include "enums.h"
enum {
ZERO = 4,
ONE = 5
};
enum {
IDX_LUMINANCE = 0,
IDX_ALPHA,
IDX_INTENSITY,
IDX_LUMINANCE_ALPHA,
IDX_RGB,
IDX_RGBA,
IDX_RED,
IDX_GREEN,
IDX_BLUE,
IDX_BGR,
IDX_BGRA,
IDX_ABGR,
IDX_RG,
MAX_IDX
};
#define MAP1(x) MAP4(x, ZERO, ZERO, ZERO)
#define MAP2(x,y) MAP4(x, y, ZERO, ZERO)
#define MAP3(x,y,z) MAP4(x, y, z, ZERO)
#define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }
static const struct {
GLubyte format_idx;
GLubyte to_rgba[6];
GLubyte from_rgba[6];
} mappings[MAX_IDX] =
{
{
IDX_LUMINANCE,
MAP4(0,0,0,ONE),
MAP1(0)
},
{
IDX_ALPHA,
MAP4(ZERO, ZERO, ZERO, 0),
MAP1(3)
},
{
IDX_INTENSITY,
MAP4(0, 0, 0, 0),
MAP1(0),
},
{
IDX_LUMINANCE_ALPHA,
MAP4(0,0,0,1),
MAP2(0,3)
},
{
IDX_RGB,
MAP4(0,1,2,ONE),
MAP3(0,1,2)
},
{
IDX_RGBA,
MAP4(0,1,2,3),
MAP4(0,1,2,3),
},
{
IDX_RED,
MAP4(0, ZERO, ZERO, ONE),
MAP1(0),
},
{
IDX_GREEN,
MAP4(ZERO, 0, ZERO, ONE),
MAP1(1),
},
{
IDX_BLUE,
MAP4(ZERO, ZERO, 0, ONE),
MAP1(2),
},
{
IDX_BGR,
MAP4(2,1,0,ONE),
MAP3(2,1,0)
},
{
IDX_BGRA,
MAP4(2,1,0,3),
MAP4(2,1,0,3)
},
{
IDX_ABGR,
MAP4(3,2,1,0),
MAP4(3,2,1,0)
},
{
IDX_RG,
MAP4(0, 1, ZERO, ONE),
MAP2(0, 1)
},
};
/**
* Convert a GL image format enum to an IDX_* value (see above).
*/
static int
get_map_idx(GLenum value)
{
switch (value) {
case GL_LUMINANCE:
case GL_LUMINANCE_INTEGER_EXT:
return IDX_LUMINANCE;
case GL_ALPHA:
case GL_ALPHA_INTEGER:
return IDX_ALPHA;
case GL_INTENSITY:
return IDX_INTENSITY;
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE_ALPHA_INTEGER_EXT:
return IDX_LUMINANCE_ALPHA;
case GL_RGB:
case GL_RGB_INTEGER:
return IDX_RGB;
case GL_RGBA:
case GL_RGBA_INTEGER:
return IDX_RGBA;
case GL_RED:
case GL_RED_INTEGER:
return IDX_RED;
case GL_GREEN:
return IDX_GREEN;
case GL_BLUE:
return IDX_BLUE;
case GL_BGR:
case GL_BGR_INTEGER:
return IDX_BGR;
case GL_BGRA:
case GL_BGRA_INTEGER:
return IDX_BGRA;
case GL_ABGR_EXT:
return IDX_ABGR;
case GL_RG:
case GL_RG_INTEGER:
return IDX_RG;
default:
_mesa_problem(NULL, "Unexpected inFormat %s",
_mesa_enum_to_string(value));
return 0;
}
}
/**
* When promoting texture formats (see below) we need to compute the
* mapping of dest components back to source components.
* This function does that.
* \param inFormat the incoming format of the texture
* \param outFormat the final texture format
* \return map[6] a full 6-component map
*/
void
_mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
{
const int inFmt = get_map_idx(inFormat);
const int outFmt = get_map_idx(outFormat);
const GLubyte *in2rgba = mappings[inFmt].to_rgba;
const GLubyte *rgba2out = mappings[outFmt].from_rgba;
int i;
for (i = 0; i < 4; i++)
map[i] = in2rgba[rgba2out[i]];
map[ZERO] = ZERO;
map[ONE] = ONE;
#if 0
printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
inFormat, _mesa_enum_to_string(inFormat),
outFormat, _mesa_enum_to_string(outFormat),
map[0],
map[1],
map[2],
map[3],
map[4],
map[5]);
#endif
}
/**
* \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
*/
GLboolean
_mesa_type_is_packed(GLenum type)
{
switch (type) {
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
case MESA_UNSIGNED_BYTE_4_4:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
case GL_UNSIGNED_INT_8_8_8_8:
case GL_UNSIGNED_INT_8_8_8_8_REV:
case GL_UNSIGNED_INT_10_10_10_2:
case GL_UNSIGNED_INT_2_10_10_10_REV:
case GL_UNSIGNED_SHORT_8_8_MESA:
case GL_UNSIGNED_SHORT_8_8_REV_MESA:
case GL_UNSIGNED_INT_24_8_EXT:
case GL_UNSIGNED_INT_5_9_9_9_REV:
case GL_UNSIGNED_INT_10F_11F_11F_REV:
case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
return GL_TRUE;
}
return GL_FALSE;
}
/**
* Get the size of a GL data type.
*
* \param type GL data type.
*
* \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
* if an invalid type enum.
*/
GLint
_mesa_sizeof_type(GLenum type)
{
switch (type) {
case GL_BITMAP:
return 0;
case GL_UNSIGNED_BYTE:
return sizeof(GLubyte);
case GL_BYTE:
return sizeof(GLbyte);
case GL_UNSIGNED_SHORT:
return sizeof(GLushort);
case GL_SHORT:
return sizeof(GLshort);
case GL_UNSIGNED_INT:
return sizeof(GLuint);
case GL_INT:
return sizeof(GLint);
case GL_FLOAT:
return sizeof(GLfloat);
case GL_DOUBLE:
return sizeof(GLdouble);
case GL_HALF_FLOAT_ARB:
case GL_HALF_FLOAT_OES:
return sizeof(GLhalfARB);
case GL_FIXED:
return sizeof(GLfixed);
default:
return -1;
}
}
/**
* Same as _mesa_sizeof_type() but also accepting the packed pixel
* format data types.
*/
GLint
_mesa_sizeof_packed_type(GLenum type)
{
switch (type) {
case GL_BITMAP:
return 0;
case GL_UNSIGNED_BYTE:
return sizeof(GLubyte);
case GL_BYTE:
return sizeof(GLbyte);
case GL_UNSIGNED_SHORT:
return sizeof(GLushort);
case GL_SHORT:
return sizeof(GLshort);
case GL_UNSIGNED_INT:
return sizeof(GLuint);
case GL_INT:
return sizeof(GLint);
case GL_HALF_FLOAT_ARB:
case GL_HALF_FLOAT_OES:
return sizeof(GLhalfARB);
case GL_FLOAT:
return sizeof(GLfloat);
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
case MESA_UNSIGNED_BYTE_4_4:
return sizeof(GLubyte);
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
case GL_UNSIGNED_SHORT_8_8_MESA:
case GL_UNSIGNED_SHORT_8_8_REV_MESA:
return sizeof(GLushort);
case GL_UNSIGNED_INT_8_8_8_8:
case GL_UNSIGNED_INT_8_8_8_8_REV:
case GL_UNSIGNED_INT_10_10_10_2:
case GL_UNSIGNED_INT_2_10_10_10_REV:
case GL_UNSIGNED_INT_24_8_EXT:
case GL_UNSIGNED_INT_5_9_9_9_REV:
case GL_UNSIGNED_INT_10F_11F_11F_REV:
return sizeof(GLuint);
case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
return 8;
default:
return -1;
}
}
/**
* Get the number of components in a pixel format.
*
* \param format pixel format.
*
* \return the number of components in the given format, or -1 if a bad format.
*/
GLint
_mesa_components_in_format(GLenum format)
{
switch (format) {
case GL_COLOR_INDEX:
case GL_STENCIL_INDEX:
case GL_DEPTH_COMPONENT:
case GL_RED:
case GL_RED_INTEGER_EXT:
case GL_GREEN:
case GL_GREEN_INTEGER_EXT:
case GL_BLUE:
case GL_BLUE_INTEGER_EXT:
case GL_ALPHA:
case GL_ALPHA_INTEGER_EXT:
case GL_LUMINANCE:
case GL_LUMINANCE_INTEGER_EXT:
case GL_INTENSITY:
return 1;
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE_ALPHA_INTEGER_EXT:
case GL_RG:
case GL_YCBCR_MESA:
case GL_DEPTH_STENCIL_EXT:
case GL_RG_INTEGER:
return 2;
case GL_RGB:
case GL_BGR:
case GL_RGB_INTEGER_EXT:
case GL_BGR_INTEGER_EXT:
return 3;
case GL_RGBA:
case GL_BGRA:
case GL_ABGR_EXT:
case GL_RGBA_INTEGER_EXT:
case GL_BGRA_INTEGER_EXT:
return 4;
default:
return -1;
}
}
/**
* Get the bytes per pixel of pixel format type pair.
*
* \param format pixel format.
* \param type pixel type.
*
* \return bytes per pixel, or -1 if a bad format or type was given.
*/
GLint
_mesa_bytes_per_pixel(GLenum format, GLenum type)
{
GLint comps = _mesa_components_in_format(format);
if (comps < 0)
return -1;
switch (type) {
case GL_BITMAP:
return 0; /* special case */
case GL_BYTE:
case GL_UNSIGNED_BYTE:
return comps * sizeof(GLubyte);
case GL_SHORT:
case GL_UNSIGNED_SHORT:
return comps * sizeof(GLshort);
case GL_INT:
case GL_UNSIGNED_INT:
return comps * sizeof(GLint);
case GL_FLOAT:
return comps * sizeof(GLfloat);
case GL_HALF_FLOAT_ARB:
case GL_HALF_FLOAT_OES:
return comps * sizeof(GLhalfARB);
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
if (format == GL_RGB || format == GL_BGR ||
format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
return sizeof(GLubyte);
else
return -1; /* error */
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
if (format == GL_RGB || format == GL_BGR ||
format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
return sizeof(GLushort);
else
return -1; /* error */
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
return sizeof(GLushort);
else
return -1;
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
if (format == GL_RGBA || format == GL_BGRA ||
format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
return sizeof(GLushort);
else
return -1;
case GL_UNSIGNED_INT_8_8_8_8:
case GL_UNSIGNED_INT_8_8_8_8_REV:
if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
format == GL_RGB)
return sizeof(GLuint);
else
return -1;
case GL_UNSIGNED_INT_10_10_10_2:
case GL_UNSIGNED_INT_2_10_10_10_REV:
if (format == GL_RGBA || format == GL_BGRA ||
format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
format == GL_RGB)
return sizeof(GLuint);
else
return -1;
case GL_UNSIGNED_SHORT_8_8_MESA:
case GL_UNSIGNED_SHORT_8_8_REV_MESA:
if (format == GL_YCBCR_MESA)
return sizeof(GLushort);
else
return -1;
case GL_UNSIGNED_INT_24_8_EXT:
if (format == GL_DEPTH_COMPONENT ||
format == GL_DEPTH_STENCIL_EXT)
return sizeof(GLuint);
else
return -1;
case GL_UNSIGNED_INT_5_9_9_9_REV:
if (format == GL_RGB)
return sizeof(GLuint);
else
return -1;
case GL_UNSIGNED_INT_10F_11F_11F_REV:
if (format == GL_RGB)
return sizeof(GLuint);
else
return -1;
case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
if (format == GL_DEPTH_STENCIL)
return 8;
else
return -1;
default:
return -1;
}
}
/**
* Get the number of bytes for a vertex attrib with the given number of
* components and type.
*
* \param comps number of components.
* \param type data type.
*
* \return bytes per attribute, or -1 if a bad comps/type combination was given.
*/
GLint
_mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
{
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
return comps * sizeof(GLubyte);
case GL_SHORT:
case GL_UNSIGNED_SHORT:
return comps * sizeof(GLshort);
case GL_INT:
case GL_UNSIGNED_INT:
return comps * sizeof(GLint);
case GL_FLOAT:
return comps * sizeof(GLfloat);
case GL_HALF_FLOAT_ARB:
return comps * sizeof(GLhalfARB);
case GL_DOUBLE:
return comps * sizeof(GLdouble);
case GL_FIXED:
return comps * sizeof(GLfixed);
case GL_INT_2_10_10_10_REV:
case GL_UNSIGNED_INT_2_10_10_10_REV:
if (comps == 4)
return sizeof(GLuint);
else
return -1;
case GL_UNSIGNED_INT_10F_11F_11F_REV:
if (comps == 3)
return sizeof(GLuint);
else
return -1;
default:
return -1;
}
}
/**
* Test if the given format is unsized.
*/
GLboolean
_mesa_is_enum_format_unsized(GLenum format)
{
switch (format) {
case GL_RGBA:
case GL_BGRA:
case GL_ABGR_EXT:
case GL_RGB:
case GL_BGR:
case GL_RG:
case GL_RED:
case GL_GREEN:
case GL_BLUE:
case GL_ALPHA:
case GL_INTENSITY:
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
case GL_SRGB:
case GL_SRGB_ALPHA:
case GL_SLUMINANCE:
case GL_SLUMINANCE_ALPHA:
case GL_RGBA_SNORM:
case GL_RGB_SNORM:
case GL_RG_SNORM:
case GL_RED_SNORM:
case GL_ALPHA_SNORM:
case GL_INTENSITY_SNORM:
case GL_LUMINANCE_SNORM:
case GL_LUMINANCE_ALPHA_SNORM:
case GL_RED_INTEGER:
case GL_GREEN_INTEGER:
case GL_BLUE_INTEGER:
case GL_ALPHA_INTEGER:
case GL_RGB_INTEGER:
case GL_RGBA_INTEGER:
case GL_BGR_INTEGER:
case GL_BGRA_INTEGER:
case GL_RG_INTEGER:
case GL_LUMINANCE_INTEGER_EXT:
case GL_LUMINANCE_ALPHA_INTEGER_EXT:
case GL_DEPTH_COMPONENT:
case GL_DEPTH_STENCIL:
case GL_STENCIL_INDEX:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* Test if the given format is a UNORM (unsigned-normalized) format.
*/
GLboolean
_mesa_is_enum_format_unorm(GLenum format)
{
switch(format) {
case GL_RED:
case GL_GREEN:
case GL_BLUE:
case GL_ALPHA:
case GL_ALPHA4:
case GL_ALPHA8:
case GL_ALPHA12:
case GL_ALPHA16:
case 1:
case GL_LUMINANCE:
case GL_SLUMINANCE:
case GL_LUMINANCE4:
case GL_LUMINANCE8:
case GL_LUMINANCE12:
case GL_LUMINANCE16:
case 2:
case GL_LUMINANCE_ALPHA:
case GL_SLUMINANCE_ALPHA:
case GL_LUMINANCE4_ALPHA4:
case GL_LUMINANCE6_ALPHA2:
case GL_LUMINANCE8_ALPHA8:
case GL_LUMINANCE12_ALPHA4:
case GL_LUMINANCE12_ALPHA12:
case GL_LUMINANCE16_ALPHA16:
case GL_INTENSITY:
case GL_INTENSITY4:
case GL_INTENSITY8:
case GL_INTENSITY12:
case GL_INTENSITY16:
case GL_R8:
case GL_R16:
case GL_RG:
case GL_RG8:
case GL_RG16:
case 3:
case GL_RGB:
case GL_BGR:
case GL_SRGB:
case GL_R3_G3_B2:
case GL_RGB4:
case GL_RGB5:
case GL_RGB565:
case GL_RGB8:
case GL_RGB10:
case GL_RGB12:
case GL_RGB16:
case 4:
case GL_ABGR_EXT:
case GL_RGBA:
case GL_BGRA:
case GL_SRGB_ALPHA:
case GL_RGBA2:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGBA8:
case GL_RGB10_A2:
case GL_RGBA12:
case GL_RGBA16:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* Test if the given format is a SNORM (signed-normalized) format.
*/
GLboolean
_mesa_is_enum_format_snorm(GLenum format)
{
switch (format) {
/* signed, normalized texture formats */
case GL_RED_SNORM:
case GL_R8_SNORM:
case GL_R16_SNORM:
case GL_RG_SNORM:
case GL_RG8_SNORM:
case GL_RG16_SNORM:
case GL_RGB_SNORM:
case GL_RGB8_SNORM:
case GL_RGB16_SNORM:
case GL_RGBA_SNORM:
case GL_RGBA8_SNORM:
case GL_RGBA16_SNORM:
case GL_ALPHA_SNORM:
case GL_ALPHA8_SNORM:
case GL_ALPHA16_SNORM:
case GL_LUMINANCE_SNORM:
case GL_LUMINANCE8_SNORM:
case GL_LUMINANCE16_SNORM:
case GL_LUMINANCE_ALPHA_SNORM:
case GL_LUMINANCE8_ALPHA8_SNORM:
case GL_LUMINANCE16_ALPHA16_SNORM:
case GL_INTENSITY_SNORM:
case GL_INTENSITY8_SNORM:
case GL_INTENSITY16_SNORM:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* Test if the given format is an integer (non-normalized) format.
*/
GLboolean
_mesa_is_enum_format_unsigned_int(GLenum format)
{
switch (format) {
/* specific integer formats */
case GL_RGBA32UI_EXT:
case GL_RGB32UI_EXT:
case GL_RG32UI:
case GL_R32UI:
case GL_ALPHA32UI_EXT:
case GL_INTENSITY32UI_EXT:
case GL_LUMINANCE32UI_EXT:
case GL_LUMINANCE_ALPHA32UI_EXT:
case GL_RGBA16UI_EXT:
case GL_RGB16UI_EXT:
case GL_RG16UI:
case GL_R16UI:
case GL_ALPHA16UI_EXT:
case GL_INTENSITY16UI_EXT:
case GL_LUMINANCE16UI_EXT:
case GL_LUMINANCE_ALPHA16UI_EXT:
case GL_RGBA8UI_EXT:
case GL_RGB8UI_EXT:
case GL_RG8UI:
case GL_R8UI:
case GL_ALPHA8UI_EXT:
case GL_INTENSITY8UI_EXT:
case GL_LUMINANCE8UI_EXT:
case GL_LUMINANCE_ALPHA8UI_EXT:
case GL_RGB10_A2UI:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* Test if the given format is an integer (non-normalized) format.
*/
GLboolean
_mesa_is_enum_format_signed_int(GLenum format)
{
switch (format) {
/* generic integer formats */
case GL_RED_INTEGER_EXT:
case GL_GREEN_INTEGER_EXT:
case GL_BLUE_INTEGER_EXT:
case GL_ALPHA_INTEGER_EXT:
case GL_RGB_INTEGER_EXT:
case GL_RGBA_INTEGER_EXT:
case GL_BGR_INTEGER_EXT:
case GL_BGRA_INTEGER_EXT:
case GL_LUMINANCE_INTEGER_EXT:
case GL_LUMINANCE_ALPHA_INTEGER_EXT:
case GL_RG_INTEGER:
/* specific integer formats */
case GL_RGBA32I_EXT:
case GL_RGB32I_EXT:
case GL_RG32I:
case GL_R32I:
case GL_ALPHA32I_EXT:
case GL_INTENSITY32I_EXT:
case GL_LUMINANCE32I_EXT:
case GL_LUMINANCE_ALPHA32I_EXT:
case GL_RGBA16I_EXT:
case GL_RGB16I_EXT:
case GL_RG16I:
case GL_R16I:
case GL_ALPHA16I_EXT:
case GL_INTENSITY16I_EXT:
case GL_LUMINANCE16I_EXT:
case GL_LUMINANCE_ALPHA16I_EXT:
case GL_RGBA8I_EXT:
case GL_RGB8I_EXT:
case GL_RG8I:
case GL_R8I:
case GL_ALPHA8I_EXT:
case GL_INTENSITY8I_EXT:
case GL_LUMINANCE8I_EXT:
case GL_LUMINANCE_ALPHA8I_EXT:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* Test if the given format is an ASTC format.
*/
GLboolean
_mesa_is_astc_format(GLenum internalFormat)
{
switch (internalFormat) {
case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
return true;
default:
return false;
}
}
/**
* Test if the given format is an integer (non-normalized) format.
*/
GLboolean
_mesa_is_enum_format_integer(GLenum format)
{
return _mesa_is_enum_format_unsigned_int(format) ||
_mesa_is_enum_format_signed_int(format);
}
GLboolean
_mesa_is_type_unsigned(GLenum type)
{
switch (type) {
case GL_UNSIGNED_INT:
case GL_UNSIGNED_INT_8_8_8_8:
case GL_UNSIGNED_INT_8_8_8_8_REV:
case GL_UNSIGNED_INT_10_10_10_2:
case GL_UNSIGNED_INT_2_10_10_10_REV:
case GL_UNSIGNED_SHORT:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
case GL_UNSIGNED_SHORT_8_8_MESA:
case GL_UNSIGNED_SHORT_8_8_REV_MESA:
case GL_UNSIGNED_BYTE:
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* Test if the given image format is a color/RGBA format (i.e., not color
* index, depth, stencil, etc).
* \param format the image format value (may by an internal texture format)
* \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
*/
GLboolean
_mesa_is_color_format(GLenum format)
{
switch (format) {
case GL_RED:
case GL_GREEN:
case GL_BLUE:
case GL_ALPHA:
case GL_ALPHA4:
case GL_ALPHA8:
case GL_ALPHA12:
case GL_ALPHA16:
case 1:
case GL_LUMINANCE:
case GL_LUMINANCE4:
case GL_LUMINANCE8:
case GL_LUMINANCE12:
case GL_LUMINANCE16:
case 2:
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE4_ALPHA4:
case GL_LUMINANCE6_ALPHA2:
case GL_LUMINANCE8_ALPHA8:
case GL_LUMINANCE12_ALPHA4:
case GL_LUMINANCE12_ALPHA12:
case GL_LUMINANCE16_ALPHA16:
case GL_INTENSITY:
case GL_INTENSITY4:
case GL_INTENSITY8:
case GL_INTENSITY12:
case GL_INTENSITY16:
case GL_R8:
case GL_R16:
case GL_RG:
case GL_RG8:
case GL_RG16:
case 3:
case GL_RGB:
case GL_BGR:
case GL_R3_G3_B2:
case GL_RGB4:
case GL_RGB5:
case GL_RGB565:
case GL_RGB8:
case GL_RGB10:
case GL_RGB12:
case GL_RGB16:
case 4:
case GL_ABGR_EXT:
case GL_RGBA:
case GL_BGRA:
case GL_RGBA2:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGBA8:
case GL_RGB10_A2:
case GL_RGBA12:
case GL_RGBA16:
/* float texture formats */
case GL_ALPHA16F_ARB:
case GL_ALPHA32F_ARB:
case GL_LUMINANCE16F_ARB:
case GL_LUMINANCE32F_ARB:
case GL_LUMINANCE_ALPHA16F_ARB:
case GL_LUMINANCE_ALPHA32F_ARB:
case GL_INTENSITY16F_ARB:
case GL_INTENSITY32F_ARB:
case GL_R16F:
case GL_R32F:
case GL_RG16F:
case GL_RG32F:
case GL_RGB16F_ARB:
case GL_RGB32F_ARB:
case GL_RGBA16F_ARB:
case GL_RGBA32F_ARB:
/* compressed formats */
case GL_COMPRESSED_ALPHA:
case GL_COMPRESSED_LUMINANCE:
case GL_COMPRESSED_LUMINANCE_ALPHA:
case GL_COMPRESSED_INTENSITY:
case GL_COMPRESSED_RED:
case GL_COMPRESSED_RG:
case GL_COMPRESSED_RGB:
case GL_COMPRESSED_RGBA:
case GL_RGB_S3TC:
case GL_RGB4_S3TC:
case GL_RGBA_S3TC:
case GL_RGBA4_S3TC:
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
case GL_COMPRESSED_RGB_FXT1_3DFX:
case GL_COMPRESSED_RGBA_FXT1_3DFX:
case GL_SRGB_EXT:
case GL_SRGB8_EXT:
case GL_SRGB_ALPHA_EXT:
case GL_SRGB8_ALPHA8_EXT:
case GL_SLUMINANCE_ALPHA_EXT:
case GL_SLUMINANCE8_ALPHA8_EXT:
case GL_SLUMINANCE_EXT:
case GL_SLUMINANCE8_EXT:
case GL_COMPRESSED_SRGB_EXT:
case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
case GL_COMPRESSED_SRGB_ALPHA_EXT:
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
case GL_COMPRESSED_SLUMINANCE_EXT:
case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
case GL_COMPRESSED_RED_RGTC1:
case GL_COMPRESSED_SIGNED_RED_RGTC1:
case GL_COMPRESSED_RG_RGTC2:
case GL_COMPRESSED_SIGNED_RG_RGTC2:
case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
case GL_ETC1_RGB8_OES:
case GL_COMPRESSED_RGB8_ETC2:
case GL_COMPRESSED_SRGB8_ETC2:
case GL_COMPRESSED_RGBA8_ETC2_EAC:
case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
case GL_COMPRESSED_R11_EAC:
case GL_COMPRESSED_RG11_EAC:
case GL_COMPRESSED_SIGNED_R11_EAC:
case GL_COMPRESSED_SIGNED_RG11_EAC:
case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
case GL_COMPRESSED_RGBA_BPTC_UNORM:
case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
/* generic integer formats */
case GL_RED_INTEGER_EXT:
case GL_GREEN_INTEGER_EXT:
case GL_BLUE_INTEGER_EXT:
case GL_ALPHA_INTEGER_EXT:
case GL_RGB_INTEGER_EXT:
case GL_RGBA_INTEGER_EXT:
case GL_BGR_INTEGER_EXT:
case GL_BGRA_INTEGER_EXT:
case GL_RG_INTEGER:
case GL_LUMINANCE_INTEGER_EXT:
case GL_LUMINANCE_ALPHA_INTEGER_EXT:
/* sized integer formats */
case GL_RGBA32UI_EXT:
case GL_RGB32UI_EXT:
case GL_RG32UI:
case GL_R32UI:
case GL_ALPHA32UI_EXT:
case GL_INTENSITY32UI_EXT:
case GL_LUMINANCE32UI_EXT:
case GL_LUMINANCE_ALPHA32UI_EXT:
case GL_RGBA16UI_EXT:
case GL_RGB16UI_EXT:
case GL_RG16UI:
case GL_R16UI:
case GL_ALPHA16UI_EXT:
case GL_INTENSITY16UI_EXT:
case GL_LUMINANCE16UI_EXT:
case GL_LUMINANCE_ALPHA16UI_EXT:
case GL_RGBA8UI_EXT:
case GL_RGB8UI_EXT:
case GL_RG8UI:
case GL_R8UI:
case GL_ALPHA8UI_EXT:
case GL_INTENSITY8UI_EXT:
case GL_LUMINANCE8UI_EXT:
case GL_LUMINANCE_ALPHA8UI_EXT:
case GL_RGBA32I_EXT:
case GL_RGB32I_EXT:
case GL_RG32I:
case GL_R32I:
case GL_ALPHA32I_EXT:
case GL_INTENSITY32I_EXT:
case GL_LUMINANCE32I_EXT:
case GL_LUMINANCE_ALPHA32I_EXT:
case GL_RGBA16I_EXT:
case GL_RGB16I_EXT:
case GL_RG16I:
case GL_R16I:
case GL_ALPHA16I_EXT:
case GL_INTENSITY16I_EXT:
case GL_LUMINANCE16I_EXT:
case GL_LUMINANCE_ALPHA16I_EXT:
case GL_RGBA8I_EXT:
case GL_RGB8I_EXT:
case GL_RG8I:
case GL_R8I:
case GL_ALPHA8I_EXT:
case GL_INTENSITY8I_EXT:
case GL_LUMINANCE8I_EXT:
case GL_LUMINANCE_ALPHA8I_EXT:
/* signed, normalized texture formats */
case GL_RED_SNORM:
case GL_R8_SNORM:
case GL_R16_SNORM:
case GL_RG_SNORM:
case GL_RG8_SNORM:
case GL_RG16_SNORM:
case GL_RGB_SNORM:
case GL_RGB8_SNORM:
case GL_RGB16_SNORM:
case GL_RGBA_SNORM:
case GL_RGBA8_SNORM:
case GL_RGBA16_SNORM:
case GL_ALPHA_SNORM:
case GL_ALPHA8_SNORM:
case GL_ALPHA16_SNORM:
case GL_LUMINANCE_SNORM:
case GL_LUMINANCE8_SNORM:
case GL_LUMINANCE16_SNORM:
case GL_LUMINANCE_ALPHA_SNORM:
case GL_LUMINANCE8_ALPHA8_SNORM:
case GL_LUMINANCE16_ALPHA16_SNORM:
case GL_INTENSITY_SNORM:
case GL_INTENSITY8_SNORM:
case GL_INTENSITY16_SNORM:
case GL_RGB9_E5:
case GL_R11F_G11F_B10F:
case GL_RGB10_A2UI:
return GL_TRUE;
case GL_YCBCR_MESA: /* not considered to be RGB */
/* fall-through */
default:
return GL_FALSE;
}
}
/**
* Test if the given image format is a depth component format.
*/
GLboolean
_mesa_is_depth_format(GLenum format)
{
switch (format) {
case GL_DEPTH_COMPONENT:
case GL_DEPTH_COMPONENT16:
case GL_DEPTH_COMPONENT24:
case GL_DEPTH_COMPONENT32:
case GL_DEPTH_COMPONENT32F:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* Test if the given image format is a stencil format.
*/
GLboolean
_mesa_is_stencil_format(GLenum format)
{
switch (format) {
case GL_STENCIL_INDEX:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* Test if the given image format is a YCbCr format.
*/
GLboolean
_mesa_is_ycbcr_format(GLenum format)
{
switch (format) {
case GL_YCBCR_MESA:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* Test if the given image format is a depth+stencil format.
*/
GLboolean
_mesa_is_depthstencil_format(GLenum format)
{
switch (format) {
case GL_DEPTH24_STENCIL8_EXT:
case GL_DEPTH_STENCIL_EXT:
case GL_DEPTH32F_STENCIL8:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* Test if the given image format is a depth or stencil format.
*/
GLboolean
_mesa_is_depth_or_stencil_format(GLenum format)
{
switch (format) {
case GL_DEPTH_COMPONENT:
case GL_DEPTH_COMPONENT16:
case GL_DEPTH_COMPONENT24:
case GL_DEPTH_COMPONENT32:
case GL_STENCIL_INDEX:
case GL_STENCIL_INDEX1_EXT:
case GL_STENCIL_INDEX4_EXT:
case GL_STENCIL_INDEX8_EXT:
case GL_STENCIL_INDEX16_EXT:
case GL_DEPTH_STENCIL_EXT:
case GL_DEPTH24_STENCIL8_EXT:
case GL_DEPTH_COMPONENT32F:
case GL_DEPTH32F_STENCIL8:
return GL_TRUE;
default:
return GL_FALSE;
}
}
/**
* Test if an image format is a supported compressed format.
* \param format the internal format token provided by the user.
* \return GL_TRUE if compressed, GL_FALSE if uncompressed
*/
GLboolean
_mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
{
mesa_format m_format = _mesa_glenum_to_compressed_format(format);
/* Some formats in this switch have an equivalent mesa_format_layout
* to the compressed formats in the layout switch below and thus
* must be handled first.
*/
switch (format) {
case GL_RGB_S3TC:
case GL_RGB4_S3TC:
case GL_RGBA_S3TC:
case GL_RGBA4_S3TC:
return _mesa_is_desktop_gl(ctx) &&
ctx->Extensions.ANGLE_texture_compression_dxt;
case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
return ctx->API == API_OPENGL_COMPAT
&& ctx->Extensions.ATI_texture_compression_3dc;
case GL_PALETTE4_RGB8_OES:
case GL_PALETTE4_RGBA8_OES:
case GL_PALETTE4_R5_G6_B5_OES:
case GL_PALETTE4_RGBA4_OES:
case GL_PALETTE4_RGB5_A1_OES:
case GL_PALETTE8_RGB8_OES:
case GL_PALETTE8_RGBA8_OES:
case GL_PALETTE8_R5_G6_B5_OES:
case GL_PALETTE8_RGBA4_OES:
case GL_PALETTE8_RGB5_A1_OES:
return ctx->API == API_OPENGLES;
}
switch (_mesa_get_format_layout(m_format)) {
case MESA_FORMAT_LAYOUT_S3TC:
if (_mesa_get_format_color_encoding(m_format) == GL_LINEAR) {
/* Assume that the ANGLE flag will always be set if the
* EXT flag is set.
*/
return ctx->Extensions.ANGLE_texture_compression_dxt;
} else {
return _mesa_is_desktop_gl(ctx)
&& ctx->Extensions.EXT_texture_sRGB
&& ctx->Extensions.EXT_texture_compression_s3tc;
}
case MESA_FORMAT_LAYOUT_FXT1:
return _mesa_is_desktop_gl(ctx)
&& ctx->Extensions.TDFX_texture_compression_FXT1;
case MESA_FORMAT_LAYOUT_RGTC:
return _mesa_is_desktop_gl(ctx)
&& ctx->Extensions.ARB_texture_compression_rgtc;
case MESA_FORMAT_LAYOUT_LATC:
return ctx->API == API_OPENGL_COMPAT
&& ctx->Extensions.EXT_texture_compression_latc;
case MESA_FORMAT_LAYOUT_ETC1:
return _mesa_is_gles(ctx)
&& ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
case MESA_FORMAT_LAYOUT_ETC2:
return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
case MESA_FORMAT_LAYOUT_BPTC:
return _mesa_is_desktop_gl(ctx) &&
ctx->Extensions.ARB_texture_compression_bptc;
case MESA_FORMAT_LAYOUT_ASTC:
return ctx->Extensions.KHR_texture_compression_astc_ldr;
default:
return GL_FALSE;
}
}
/**
* Convert various unpack formats to the corresponding base format.
*/
GLenum
_mesa_unpack_format_to_base_format(GLenum format)
{
switch(format) {
case GL_RED_INTEGER:
return GL_RED;
case GL_GREEN_INTEGER:
return GL_GREEN;
case GL_BLUE_INTEGER:
return GL_BLUE;
case GL_ALPHA_INTEGER:
return GL_ALPHA;
case GL_RG_INTEGER:
return GL_RG;
case GL_RGB_INTEGER:
return GL_RGB;
case GL_RGBA_INTEGER:
return GL_RGBA;
case GL_BGR_INTEGER:
return GL_BGR;
case GL_BGRA_INTEGER:
return GL_BGRA;
case GL_LUMINANCE_INTEGER_EXT:
return GL_LUMINANCE;
case GL_LUMINANCE_ALPHA_INTEGER_EXT:
return GL_LUMINANCE_ALPHA;
case GL_RED:
case GL_GREEN:
case GL_BLUE:
case GL_RG:
case GL_RGB:
case GL_RGBA:
case GL_BGR:
case GL_BGRA:
case GL_ALPHA:
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
default:
return format;
}
}
/**
* Convert various base formats to the corresponding integer format.
*/
GLenum
_mesa_base_format_to_integer_format(GLenum format)
{
switch(format) {
case GL_RED:
return GL_RED_INTEGER;
case GL_GREEN:
return GL_GREEN_INTEGER;
case GL_BLUE:
return GL_BLUE_INTEGER;
case GL_RG:
return GL_RG_INTEGER;
case GL_RGB:
return GL_RGB_INTEGER;
case GL_RGBA:
return GL_RGBA_INTEGER;
case GL_BGR:
return GL_BGR_INTEGER;
case GL_BGRA:
return GL_BGRA_INTEGER;
case GL_ALPHA:
return GL_ALPHA_INTEGER;
case GL_LUMINANCE:
return GL_LUMINANCE_INTEGER_EXT;
case GL_LUMINANCE_ALPHA:
return GL_LUMINANCE_ALPHA_INTEGER_EXT;
}
return format;
}
/**
* Does the given base texture/renderbuffer format have the channel
* named by 'pname'?
*/
GLboolean
_mesa_base_format_has_channel(GLenum base_format, GLenum pname)
{
switch (pname) {
case GL_TEXTURE_RED_SIZE:
case GL_TEXTURE_RED_TYPE:
case GL_RENDERBUFFER_RED_SIZE_EXT:
case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
if (base_format == GL_RED ||
base_format == GL_RG ||
base_format == GL_RGB ||
base_format == GL_RGBA) {
return GL_TRUE;
}
return GL_FALSE;
case GL_TEXTURE_GREEN_SIZE:
case GL_TEXTURE_GREEN_TYPE:
case GL_RENDERBUFFER_GREEN_SIZE_EXT:
case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
if (base_format == GL_RG ||
base_format == GL_RGB ||
base_format == GL_RGBA) {
return GL_TRUE;
}
return GL_FALSE;
case GL_TEXTURE_BLUE_SIZE:
case GL_TEXTURE_BLUE_TYPE:
case GL_RENDERBUFFER_BLUE_SIZE_EXT:
case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
if (base_format == GL_RGB ||
base_format == GL_RGBA) {
return GL_TRUE;
}
return GL_FALSE;
case GL_TEXTURE_ALPHA_SIZE:
case GL_TEXTURE_ALPHA_TYPE:
case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
if (base_format == GL_RGBA ||
base_format == GL_ALPHA ||
base_format == GL_LUMINANCE_ALPHA) {
return GL_TRUE;
}
return GL_FALSE;
case GL_TEXTURE_LUMINANCE_SIZE:
case GL_TEXTURE_LUMINANCE_TYPE:
if (base_format == GL_LUMINANCE ||
base_format == GL_LUMINANCE_ALPHA) {
return GL_TRUE;
}
return GL_FALSE;
case GL_TEXTURE_INTENSITY_SIZE:
case GL_TEXTURE_INTENSITY_TYPE:
if (base_format == GL_INTENSITY) {
return GL_TRUE;
}
return GL_FALSE;
case GL_TEXTURE_DEPTH_SIZE:
case GL_TEXTURE_DEPTH_TYPE:
case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
if (base_format == GL_DEPTH_STENCIL ||
base_format == GL_DEPTH_COMPONENT) {
return GL_TRUE;
}
return GL_FALSE;
case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
if (base_format == GL_DEPTH_STENCIL ||
base_format == GL_STENCIL_INDEX) {
return GL_TRUE;
}
return GL_FALSE;
default:
_mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
__func__, pname);
return GL_FALSE;
}
return GL_FALSE;
}
/**
* Returns the number of channels/components for a base format.
*/
GLint
_mesa_base_format_component_count(GLenum base_format)
{
switch (base_format) {
case GL_RED:
case GL_ALPHA:
case GL_INTENSITY:
case GL_DEPTH_COMPONENT:
return 1;
case GL_RG:
case GL_LUMINANCE_ALPHA:
case GL_DEPTH_STENCIL:
return 2;
case GL_RGB:
return 3;
case GL_RGBA:
return 4;
default:
return -1;
}
}
/**
* If format is a generic compressed format, return the corresponding
* non-compressed format. For other formats, return the format as-is.
*/
GLenum
_mesa_generic_compressed_format_to_uncompressed_format(GLenum format)
{
switch (format) {
case GL_COMPRESSED_RED:
return GL_RED;
case GL_COMPRESSED_RG:
return GL_RG;
case GL_COMPRESSED_RGB:
return GL_RGB;
case GL_COMPRESSED_RGBA:
return GL_RGBA;
case GL_COMPRESSED_ALPHA:
return GL_ALPHA;
case GL_COMPRESSED_LUMINANCE:
return GL_LUMINANCE;
case GL_COMPRESSED_LUMINANCE_ALPHA:
return GL_LUMINANCE_ALPHA;
case GL_COMPRESSED_INTENSITY:
return GL_INTENSITY;
/* sRGB formats */
case GL_COMPRESSED_SRGB:
return GL_SRGB;
case GL_COMPRESSED_SRGB_ALPHA:
return GL_SRGB_ALPHA;
case GL_COMPRESSED_SLUMINANCE:
return GL_SLUMINANCE;
case GL_COMPRESSED_SLUMINANCE_ALPHA:
return GL_SLUMINANCE_ALPHA;
default:
return format;
}
}
/**
* Return the equivalent non-generic internal format.
* This is useful for comparing whether two internal formats are equivalent.
*/
GLenum
_mesa_get_nongeneric_internalformat(GLenum format)
{
switch (format) {
/* GL 1.1 formats. */
case 4:
case GL_RGBA:
return GL_RGBA8;
case 3:
case GL_RGB:
return GL_RGB8;
case 2:
case GL_LUMINANCE_ALPHA:
return GL_LUMINANCE8_ALPHA8;
case 1:
case GL_LUMINANCE:
return GL_LUMINANCE8;
case GL_ALPHA:
return GL_ALPHA8;
case GL_INTENSITY:
return GL_INTENSITY8;
/* GL_ARB_texture_rg */
case GL_RED:
return GL_R8;
case GL_RG:
return GL_RG8;
/* GL_EXT_texture_sRGB */
case GL_SRGB:
return GL_SRGB8;
case GL_SRGB_ALPHA:
return GL_SRGB8_ALPHA8;
case GL_SLUMINANCE:
return GL_SLUMINANCE8;
case GL_SLUMINANCE_ALPHA:
return GL_SLUMINANCE8_ALPHA8;
/* GL_EXT_texture_snorm */
case GL_RGBA_SNORM:
return GL_RGBA8_SNORM;
case GL_RGB_SNORM:
return GL_RGB8_SNORM;
case GL_RG_SNORM:
return GL_RG8_SNORM;
case GL_RED_SNORM:
return GL_R8_SNORM;
case GL_LUMINANCE_ALPHA_SNORM:
return GL_LUMINANCE8_ALPHA8_SNORM;
case GL_LUMINANCE_SNORM:
return GL_LUMINANCE8_SNORM;
case GL_ALPHA_SNORM:
return GL_ALPHA8_SNORM;
case GL_INTENSITY_SNORM:
return GL_INTENSITY8_SNORM;
default:
return format;
}
}
/**
* Convert an sRGB internal format to linear.
*/
GLenum
_mesa_get_linear_internalformat(GLenum format)
{
switch (format) {
case GL_SRGB:
return GL_RGB;
case GL_SRGB_ALPHA:
return GL_RGBA;
case GL_SRGB8:
return GL_RGB8;
case GL_SRGB8_ALPHA8:
return GL_RGBA8;
case GL_SLUMINANCE8:
return GL_LUMINANCE8;
case GL_SLUMINANCE:
return GL_LUMINANCE;
case GL_SLUMINANCE_ALPHA:
return GL_LUMINANCE_ALPHA;
case GL_SLUMINANCE8_ALPHA8:
return GL_LUMINANCE8_ALPHA8;
default:
return format;
}
}
/**
* Do error checking of format/type combinations for glReadPixels,
* glDrawPixels and glTex[Sub]Image. Note that depending on the format
* and type values, we may either generate GL_INVALID_OPERATION or
* GL_INVALID_ENUM.
*
* \param format pixel format.
* \param type pixel type.
*
* \return GL_INVALID_ENUM, GL_INVALID_OPERATION or GL_NO_ERROR
*/
GLenum
_mesa_error_check_format_and_type(const struct gl_context *ctx,
GLenum format, GLenum type)
{
/* From OpenGL 3.3 spec, page 220:
* "If the format is DEPTH_STENCIL, then values are taken from
* both the depth buffer and the stencil buffer. If there is no
* depth buffer or if there is no stencil buffer, then the error
* INVALID_OPERATION occurs. If the type parameter is not
* UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
* error INVALID_ENUM occurs."
*
* OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
* cannot be used to read depth or stencil in that API.
*/
if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
&& type != GL_UNSIGNED_INT_24_8
&& type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
return GL_INVALID_ENUM;
/* special type-based checks (see glReadPixels, glDrawPixels error lists) */
switch (type) {
case GL_BITMAP:
if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
return GL_INVALID_ENUM;
}
break;
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
if (format == GL_RGB) {
break; /* OK */
}
if (format == GL_RGB_INTEGER_EXT &&
ctx->Extensions.ARB_texture_rgb10_a2ui) {
break; /* OK */
}
return GL_INVALID_OPERATION;
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
case GL_UNSIGNED_INT_8_8_8_8:
case GL_UNSIGNED_INT_8_8_8_8_REV:
if (format == GL_RGBA ||
format == GL_BGRA ||
format == GL_ABGR_EXT) {
break; /* OK */
}
if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
ctx->Extensions.ARB_texture_rgb10_a2ui) {
break; /* OK */
}
return GL_INVALID_OPERATION;
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
case GL_UNSIGNED_INT_10_10_10_2:
case GL_UNSIGNED_INT_2_10_10_10_REV:
if (format == GL_RGBA ||
format == GL_BGRA) {
break; /* OK */
}
if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
ctx->Extensions.ARB_texture_rgb10_a2ui) {
break; /* OK */
}
if (type == GL_UNSIGNED_INT_2_10_10_10_REV && format == GL_RGB &&
ctx->API == API_OPENGLES2) {
break; /* OK by GL_EXT_texture_type_2_10_10_10_REV */
}
return GL_INVALID_OPERATION;
case GL_UNSIGNED_INT_24_8:
/* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
return GL_NO_ERROR;
if (format != GL_DEPTH_STENCIL) {
return GL_INVALID_OPERATION;
}
return GL_NO_ERROR;
case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
if (!ctx->Extensions.ARB_depth_buffer_float) {
return GL_INVALID_ENUM;
}
if (format != GL_DEPTH_STENCIL) {
return GL_INVALID_OPERATION;
}
return GL_NO_ERROR;
case GL_UNSIGNED_INT_10F_11F_11F_REV:
if (!ctx->Extensions.EXT_packed_float) {
return GL_INVALID_ENUM;
}
if (format != GL_RGB) {
return GL_INVALID_OPERATION;
}
return GL_NO_ERROR;
case GL_HALF_FLOAT_OES:
switch (format) {
case GL_RGBA:
case GL_RGB:
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE:
case GL_ALPHA:
return GL_NO_ERROR;
case GL_RG:
case GL_RED:
if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
return GL_NO_ERROR;
default:
return GL_INVALID_OPERATION;
}
default:
; /* fall-through */
}
/* now, for each format, check the type for compatibility */
switch (format) {
case GL_COLOR_INDEX:
case GL_STENCIL_INDEX:
switch (type) {
case GL_BITMAP:
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
case GL_HALF_FLOAT:
return GL_NO_ERROR;
default:
return GL_INVALID_ENUM;
}
case GL_RED:
case GL_GREEN:
case GL_BLUE:
case GL_ALPHA:
#if 0 /* not legal! see table 3.6 of the 1.5 spec */
case GL_INTENSITY:
#endif
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
case GL_DEPTH_COMPONENT:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
case GL_HALF_FLOAT:
return GL_NO_ERROR;
default:
return GL_INVALID_ENUM;
}
case GL_RG:
if (!ctx->Extensions.ARB_texture_rg)
return GL_INVALID_ENUM;
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
case GL_HALF_FLOAT:
return GL_NO_ERROR;
default:
return GL_INVALID_ENUM;
}
case GL_RGB:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
case GL_HALF_FLOAT:
return GL_NO_ERROR;
case GL_UNSIGNED_INT_2_10_10_10_REV:
/* OK by GL_EXT_texture_type_2_10_10_10_REV */
return (ctx->API == API_OPENGLES2)
? GL_NO_ERROR : GL_INVALID_ENUM;
case GL_UNSIGNED_INT_5_9_9_9_REV:
return ctx->Extensions.EXT_texture_shared_exponent
? GL_NO_ERROR : GL_INVALID_ENUM;
case GL_UNSIGNED_INT_10F_11F_11F_REV:
return ctx->Extensions.EXT_packed_float
? GL_NO_ERROR : GL_INVALID_ENUM;
default:
return GL_INVALID_ENUM;
}
case GL_BGR:
switch (type) {
/* NOTE: no packed types are supported with BGR. That's
* intentional, according to the GL spec.
*/
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
case GL_HALF_FLOAT:
return GL_NO_ERROR;
default:
return GL_INVALID_ENUM;
}
case GL_RGBA:
case GL_BGRA:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
case GL_UNSIGNED_INT_8_8_8_8:
case GL_UNSIGNED_INT_8_8_8_8_REV:
case GL_UNSIGNED_INT_10_10_10_2:
case GL_UNSIGNED_INT_2_10_10_10_REV:
case GL_HALF_FLOAT:
return GL_NO_ERROR;
default:
return GL_INVALID_ENUM;
}
case GL_ABGR_EXT:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
case GL_UNSIGNED_INT_8_8_8_8:
case GL_UNSIGNED_INT_8_8_8_8_REV:
case GL_HALF_FLOAT:
return GL_NO_ERROR;
default:
return GL_INVALID_ENUM;
}
case GL_YCBCR_MESA:
if (!ctx->Extensions.MESA_ycbcr_texture)
return GL_INVALID_ENUM;
if (type == GL_UNSIGNED_SHORT_8_8_MESA ||
type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
return GL_NO_ERROR;
else
return GL_INVALID_OPERATION;
case GL_DEPTH_STENCIL:
if (type == GL_UNSIGNED_INT_24_8)
return GL_NO_ERROR;
else if (ctx->Extensions.ARB_depth_buffer_float &&
type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
return GL_NO_ERROR;
else
return GL_INVALID_ENUM;
/* integer-valued formats */
case GL_RED_INTEGER_EXT:
case GL_GREEN_INTEGER_EXT:
case GL_BLUE_INTEGER_EXT:
case GL_ALPHA_INTEGER_EXT:
case GL_RG_INTEGER:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
return (ctx->Version >= 30 ||
ctx->Extensions.EXT_texture_integer)
? GL_NO_ERROR : GL_INVALID_ENUM;
default:
return GL_INVALID_ENUM;
}
case GL_RGB_INTEGER_EXT:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
return (ctx->Version >= 30 ||
ctx->Extensions.EXT_texture_integer)
? GL_NO_ERROR : GL_INVALID_ENUM;
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
return ctx->Extensions.ARB_texture_rgb10_a2ui
? GL_NO_ERROR : GL_INVALID_ENUM;
default:
return GL_INVALID_ENUM;
}
case GL_BGR_INTEGER_EXT:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
/* NOTE: no packed formats w/ BGR format */
return (ctx->Version >= 30 ||
ctx->Extensions.EXT_texture_integer)
? GL_NO_ERROR : GL_INVALID_ENUM;
default:
return GL_INVALID_ENUM;
}
case GL_RGBA_INTEGER_EXT:
case GL_BGRA_INTEGER_EXT:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
return (ctx->Version >= 30 ||
ctx->Extensions.EXT_texture_integer)
? GL_NO_ERROR : GL_INVALID_ENUM;
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
case GL_UNSIGNED_INT_8_8_8_8:
case GL_UNSIGNED_INT_8_8_8_8_REV:
case GL_UNSIGNED_INT_10_10_10_2:
case GL_UNSIGNED_INT_2_10_10_10_REV:
return ctx->Extensions.ARB_texture_rgb10_a2ui
? GL_NO_ERROR : GL_INVALID_ENUM;
default:
return GL_INVALID_ENUM;
}
case GL_LUMINANCE_INTEGER_EXT:
case GL_LUMINANCE_ALPHA_INTEGER_EXT:
switch (type) {
case GL_BYTE:
case GL_UNSIGNED_BYTE:
case GL_SHORT:
case GL_UNSIGNED_SHORT:
case GL_INT:
case GL_UNSIGNED_INT:
return ctx->Extensions.EXT_texture_integer
? GL_NO_ERROR : GL_INVALID_ENUM;
default:
return GL_INVALID_ENUM;
}
default:
return GL_INVALID_ENUM;
}
return GL_NO_ERROR;
}
/**
* Do error checking of format/type combinations for OpenGL ES glReadPixels
* and glTex[Sub]Image.
* \return error code, or GL_NO_ERROR.
*/
GLenum
_mesa_es_error_check_format_and_type(GLenum format, GLenum type,
unsigned dimensions)
{
GLboolean type_valid = GL_TRUE;
switch (format) {
case GL_ALPHA:
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
type_valid = (type == GL_UNSIGNED_BYTE
|| type == GL_FLOAT
|| type == GL_HALF_FLOAT_OES);
break;
case GL_RGB:
type_valid = (type == GL_UNSIGNED_BYTE
|| type == GL_UNSIGNED_SHORT_5_6_5
|| type == GL_FLOAT
|| type == GL_HALF_FLOAT_OES);
break;
case GL_RGBA:
type_valid = (type == GL_UNSIGNED_BYTE
|| type == GL_UNSIGNED_SHORT_4_4_4_4
|| type == GL_UNSIGNED_SHORT_5_5_5_1
|| type == GL_FLOAT
|| type == GL_HALF_FLOAT_OES
|| type == GL_UNSIGNED_INT_2_10_10_10_REV);
break;
case GL_DEPTH_COMPONENT:
/* This format is filtered against invalid dimensionalities elsewhere.
*/
type_valid = (type == GL_UNSIGNED_SHORT
|| type == GL_UNSIGNED_INT);
break;
case GL_DEPTH_STENCIL:
/* This format is filtered against invalid dimensionalities elsewhere.
*/
type_valid = (type == GL_UNSIGNED_INT_24_8);
break;
case GL_BGRA_EXT:
type_valid = (type == GL_UNSIGNED_BYTE);
/* This feels like a bug in the EXT_texture_format_BGRA8888 spec, but
* the format does not appear to be allowed for 3D textures in OpenGL
* ES.
*/
if (dimensions != 2)
return GL_INVALID_VALUE;
break;
default:
return GL_INVALID_VALUE;
}
return type_valid ? GL_NO_ERROR : GL_INVALID_OPERATION;
}
/**
* Return the simple base format for a given internal texture format.
* For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
*
* \param ctx GL context.
* \param internalFormat the internal texture format token or 1, 2, 3, or 4.
*
* \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
* GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
*
* This is the format which is used during texture application (i.e. the
* texture format and env mode determine the arithmetic used.
*/
GLint
_mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
{
switch (internalFormat) {
case GL_ALPHA:
case GL_ALPHA4:
case GL_ALPHA8:
case GL_ALPHA12:
case GL_ALPHA16:
return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
case 1:
case GL_LUMINANCE:
case GL_LUMINANCE4:
case GL_LUMINANCE8:
case GL_LUMINANCE12:
case GL_LUMINANCE16:
return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
case 2:
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE4_ALPHA4:
case GL_LUMINANCE6_ALPHA2:
case GL_LUMINANCE8_ALPHA8:
case GL_LUMINANCE12_ALPHA4:
case GL_LUMINANCE12_ALPHA12:
case GL_LUMINANCE16_ALPHA16:
return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
case GL_INTENSITY:
case GL_INTENSITY4:
case GL_INTENSITY8:
case GL_INTENSITY12:
case GL_INTENSITY16:
return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
case 3:
return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
case GL_RGB:
case GL_R3_G3_B2:
case GL_RGB4:
case GL_RGB5:
case GL_RGB8:
case GL_RGB10:
case GL_RGB12:
case GL_RGB16:
return GL_RGB;
case 4:
return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
case GL_RGBA:
case GL_RGBA2:
case GL_RGBA4:
case GL_RGB5_A1:
case GL_RGBA8:
case GL_RGB10_A2:
case GL_RGBA12:
case GL_RGBA16:
return GL_RGBA;
default:
; /* fallthrough */
}
/* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
*/
if (_mesa_is_gles(ctx)) {
switch (internalFormat) {
case GL_BGRA:
return GL_RGBA;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.ARB_ES2_compatibility) {
switch (internalFormat) {
case GL_RGB565:
return GL_RGB;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.ARB_depth_texture) {
switch (internalFormat) {
case GL_DEPTH_COMPONENT:
case GL_DEPTH_COMPONENT16:
case GL_DEPTH_COMPONENT24:
case GL_DEPTH_COMPONENT32:
return GL_DEPTH_COMPONENT;
case GL_DEPTH_STENCIL:
case GL_DEPTH24_STENCIL8:
return GL_DEPTH_STENCIL;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.ARB_texture_stencil8) {
switch (internalFormat) {
case GL_STENCIL_INDEX:
case GL_STENCIL_INDEX1:
case GL_STENCIL_INDEX4:
case GL_STENCIL_INDEX8:
case GL_STENCIL_INDEX16:
return GL_STENCIL_INDEX;
default:
; /* fallthrough */
}
}
switch (internalFormat) {
case GL_COMPRESSED_ALPHA:
return GL_ALPHA;
case GL_COMPRESSED_LUMINANCE:
return GL_LUMINANCE;
case GL_COMPRESSED_LUMINANCE_ALPHA:
return GL_LUMINANCE_ALPHA;
case GL_COMPRESSED_INTENSITY:
return GL_INTENSITY;
case GL_COMPRESSED_RGB:
return GL_RGB;
case GL_COMPRESSED_RGBA:
return GL_RGBA;
default:
; /* fallthrough */
}
if (ctx->Extensions.TDFX_texture_compression_FXT1) {
switch (internalFormat) {
case GL_COMPRESSED_RGB_FXT1_3DFX:
return GL_RGB;
case GL_COMPRESSED_RGBA_FXT1_3DFX:
return GL_RGBA;
default:
; /* fallthrough */
}
}
/* Assume that the ANGLE flag will always be set if the EXT flag is set.
*/
if (ctx->Extensions.ANGLE_texture_compression_dxt) {
switch (internalFormat) {
case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
return GL_RGB;
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
return GL_RGBA;
default:
; /* fallthrough */
}
}
if (_mesa_is_desktop_gl(ctx)
&& ctx->Extensions.ANGLE_texture_compression_dxt) {
switch (internalFormat) {
case GL_RGB_S3TC:
case GL_RGB4_S3TC:
return GL_RGB;
case GL_RGBA_S3TC:
case GL_RGBA4_S3TC:
return GL_RGBA;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.MESA_ycbcr_texture) {
if (internalFormat == GL_YCBCR_MESA)
return GL_YCBCR_MESA;
}
if (ctx->Extensions.ARB_texture_float) {
switch (internalFormat) {
case GL_ALPHA16F_ARB:
case GL_ALPHA32F_ARB:
return GL_ALPHA;
case GL_RGBA16F_ARB:
case GL_RGBA32F_ARB:
return GL_RGBA;
case GL_RGB16F_ARB:
case GL_RGB32F_ARB:
return GL_RGB;
case GL_INTENSITY16F_ARB:
case GL_INTENSITY32F_ARB:
return GL_INTENSITY;
case GL_LUMINANCE16F_ARB:
case GL_LUMINANCE32F_ARB:
return GL_LUMINANCE;
case GL_LUMINANCE_ALPHA16F_ARB:
case GL_LUMINANCE_ALPHA32F_ARB:
return GL_LUMINANCE_ALPHA;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.EXT_texture_snorm) {
switch (internalFormat) {
case GL_RED_SNORM:
case GL_R8_SNORM:
case GL_R16_SNORM:
return GL_RED;
case GL_RG_SNORM:
case GL_RG8_SNORM:
case GL_RG16_SNORM:
return GL_RG;
case GL_RGB_SNORM:
case GL_RGB8_SNORM:
case GL_RGB16_SNORM:
return GL_RGB;
case GL_RGBA_SNORM:
case GL_RGBA8_SNORM:
case GL_RGBA16_SNORM:
return GL_RGBA;
case GL_ALPHA_SNORM:
case GL_ALPHA8_SNORM:
case GL_ALPHA16_SNORM:
return GL_ALPHA;
case GL_LUMINANCE_SNORM:
case GL_LUMINANCE8_SNORM:
case GL_LUMINANCE16_SNORM:
return GL_LUMINANCE;
case GL_LUMINANCE_ALPHA_SNORM:
case GL_LUMINANCE8_ALPHA8_SNORM:
case GL_LUMINANCE16_ALPHA16_SNORM:
return GL_LUMINANCE_ALPHA;
case GL_INTENSITY_SNORM:
case GL_INTENSITY8_SNORM:
case GL_INTENSITY16_SNORM:
return GL_INTENSITY;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.EXT_texture_sRGB) {
switch (internalFormat) {
case GL_SRGB_EXT:
case GL_SRGB8_EXT:
case GL_COMPRESSED_SRGB_EXT:
return GL_RGB;
case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
return ctx->Extensions.EXT_texture_compression_s3tc ? GL_RGB : -1;
case GL_SRGB_ALPHA_EXT:
case GL_SRGB8_ALPHA8_EXT:
case GL_COMPRESSED_SRGB_ALPHA_EXT:
return GL_RGBA;
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
return ctx->Extensions.EXT_texture_compression_s3tc ? GL_RGBA : -1;
case GL_SLUMINANCE_ALPHA_EXT:
case GL_SLUMINANCE8_ALPHA8_EXT:
case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
return GL_LUMINANCE_ALPHA;
case GL_SLUMINANCE_EXT:
case GL_SLUMINANCE8_EXT:
case GL_COMPRESSED_SLUMINANCE_EXT:
return GL_LUMINANCE;
default:
; /* fallthrough */
}
}
if (ctx->Version >= 30 ||
ctx->Extensions.EXT_texture_integer) {
switch (internalFormat) {
case GL_RGBA8UI_EXT:
case GL_RGBA16UI_EXT:
case GL_RGBA32UI_EXT:
case GL_RGBA8I_EXT:
case GL_RGBA16I_EXT:
case GL_RGBA32I_EXT:
case GL_RGB10_A2UI:
return GL_RGBA;
case GL_RGB8UI_EXT:
case GL_RGB16UI_EXT:
case GL_RGB32UI_EXT:
case GL_RGB8I_EXT:
case GL_RGB16I_EXT:
case GL_RGB32I_EXT:
return GL_RGB;
}
}
if (ctx->Extensions.EXT_texture_integer) {
switch (internalFormat) {
case GL_ALPHA8UI_EXT:
case GL_ALPHA16UI_EXT:
case GL_ALPHA32UI_EXT:
case GL_ALPHA8I_EXT:
case GL_ALPHA16I_EXT:
case GL_ALPHA32I_EXT:
return GL_ALPHA;
case GL_INTENSITY8UI_EXT:
case GL_INTENSITY16UI_EXT:
case GL_INTENSITY32UI_EXT:
case GL_INTENSITY8I_EXT:
case GL_INTENSITY16I_EXT:
case GL_INTENSITY32I_EXT:
return GL_INTENSITY;
case GL_LUMINANCE8UI_EXT:
case GL_LUMINANCE16UI_EXT:
case GL_LUMINANCE32UI_EXT:
case GL_LUMINANCE8I_EXT:
case GL_LUMINANCE16I_EXT:
case GL_LUMINANCE32I_EXT:
return GL_LUMINANCE;
case GL_LUMINANCE_ALPHA8UI_EXT:
case GL_LUMINANCE_ALPHA16UI_EXT:
case GL_LUMINANCE_ALPHA32UI_EXT:
case GL_LUMINANCE_ALPHA8I_EXT:
case GL_LUMINANCE_ALPHA16I_EXT:
case GL_LUMINANCE_ALPHA32I_EXT:
return GL_LUMINANCE_ALPHA;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.ARB_texture_rg) {
switch (internalFormat) {
case GL_R16F:
case GL_R32F:
if (!ctx->Extensions.ARB_texture_float)
break;
return GL_RED;
case GL_R8I:
case GL_R8UI:
case GL_R16I:
case GL_R16UI:
case GL_R32I:
case GL_R32UI:
if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
break;
/* FALLTHROUGH */
case GL_R8:
case GL_R16:
case GL_RED:
case GL_COMPRESSED_RED:
return GL_RED;
case GL_RG16F:
case GL_RG32F:
if (!ctx->Extensions.ARB_texture_float)
break;
return GL_RG;
case GL_RG8I:
case GL_RG8UI:
case GL_RG16I:
case GL_RG16UI:
case GL_RG32I:
case GL_RG32UI:
if (ctx->Version < 30 && !ctx->Extensions.EXT_texture_integer)
break;
/* FALLTHROUGH */
case GL_RG:
case GL_RG8:
case GL_RG16:
case GL_COMPRESSED_RG:
return GL_RG;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.EXT_texture_shared_exponent) {
switch (internalFormat) {
case GL_RGB9_E5_EXT:
return GL_RGB;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.EXT_packed_float) {
switch (internalFormat) {
case GL_R11F_G11F_B10F_EXT:
return GL_RGB;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.ARB_depth_buffer_float) {
switch (internalFormat) {
case GL_DEPTH_COMPONENT32F:
return GL_DEPTH_COMPONENT;
case GL_DEPTH32F_STENCIL8:
return GL_DEPTH_STENCIL;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.ARB_texture_compression_rgtc) {
switch (internalFormat) {
case GL_COMPRESSED_RED_RGTC1:
case GL_COMPRESSED_SIGNED_RED_RGTC1:
return GL_RED;
case GL_COMPRESSED_RG_RGTC2:
case GL_COMPRESSED_SIGNED_RG_RGTC2:
return GL_RG;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.EXT_texture_compression_latc) {
switch (internalFormat) {
case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
return GL_LUMINANCE;
case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
return GL_LUMINANCE_ALPHA;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.ATI_texture_compression_3dc) {
switch (internalFormat) {
case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
return GL_LUMINANCE_ALPHA;
default:
; /* fallthrough */
}
}
if (ctx->Extensions.OES_compressed_ETC1_RGB8_texture) {
switch (internalFormat) {
case GL_ETC1_RGB8_OES:
return GL_RGB;
default:
; /* fallthrough */
}
}
if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility) {
switch (internalFormat) {
case GL_COMPRESSED_RGB8_ETC2:
case GL_COMPRESSED_SRGB8_ETC2:
return GL_RGB;
case GL_COMPRESSED_RGBA8_ETC2_EAC:
case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
return GL_RGBA;
case GL_COMPRESSED_R11_EAC:
case GL_COMPRESSED_SIGNED_R11_EAC:
return GL_RED;
case GL_COMPRESSED_RG11_EAC:
case GL_COMPRESSED_SIGNED_RG11_EAC:
return GL_RG;
default:
; /* fallthrough */
}
}
if (_mesa_is_desktop_gl(ctx) &&
ctx->Extensions.ARB_texture_compression_bptc) {
switch (internalFormat) {
case GL_COMPRESSED_RGBA_BPTC_UNORM:
case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
return GL_RGBA;
case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
return GL_RGB;
default:
; /* fallthrough */
}
}
if (ctx->API == API_OPENGLES) {
switch (internalFormat) {
case GL_PALETTE4_RGB8_OES:
case GL_PALETTE4_R5_G6_B5_OES:
case GL_PALETTE8_RGB8_OES:
case GL_PALETTE8_R5_G6_B5_OES:
return GL_RGB;
case GL_PALETTE4_RGBA8_OES:
case GL_PALETTE8_RGB5_A1_OES:
case GL_PALETTE4_RGBA4_OES:
case GL_PALETTE4_RGB5_A1_OES:
case GL_PALETTE8_RGBA8_OES:
case GL_PALETTE8_RGBA4_OES:
return GL_RGBA;
default:
; /* fallthrough */
}
}
return -1; /* error */
}
/**
* Returns the effective internal format from a texture format and type.
* This is used by texture image operations internally for validation, when
* the specified internal format is a base (unsized) format.
*
* This method will only return a valid effective internal format if the
* combination of format, type and internal format in base form, is acceptable.
*
* If a single sized internal format is defined in the spec (OpenGL-ES 3.0.4) or
* in extensions, to unambiguously correspond to the given base format, then
* that internal format is returned as the effective. Otherwise, if the
* combination is accepted but a single effective format is not defined, the
* passed base format will be returned instead.
*
* \param format the texture format
* \param type the texture type
*/
static GLenum
_mesa_es3_effective_internal_format_for_format_and_type(GLenum format,
GLenum type)
{
switch (type) {
case GL_UNSIGNED_BYTE:
switch (format) {
case GL_RGBA:
return GL_RGBA8;
case GL_RGB:
return GL_RGB8;
/* Although LUMINANCE_ALPHA, LUMINANCE and ALPHA appear in table 3.12,
* (section 3.8 Texturing, page 128 of the OpenGL-ES 3.0.4) as effective
* internal formats, they do not correspond to GL constants, so the base
* format is returned instead.
*/
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE:
case GL_ALPHA:
return format;
}
break;
case GL_UNSIGNED_SHORT_4_4_4_4:
if (format == GL_RGBA)
return GL_RGBA4;
break;
case GL_UNSIGNED_SHORT_5_5_5_1:
if (format == GL_RGBA)
return GL_RGB5_A1;
break;
case GL_UNSIGNED_SHORT_5_6_5:
if (format == GL_RGB)
return GL_RGB565;
break;
/* OES_packed_depth_stencil */
case GL_UNSIGNED_INT_24_8:
if (format == GL_DEPTH_STENCIL)
return GL_DEPTH24_STENCIL8;
break;
case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
if (format == GL_DEPTH_STENCIL)
return GL_DEPTH32F_STENCIL8;
break;
case GL_UNSIGNED_SHORT:
if (format == GL_DEPTH_COMPONENT)
return GL_DEPTH_COMPONENT16;
break;
case GL_UNSIGNED_INT:
/* It can be DEPTH_COMPONENT16 or DEPTH_COMPONENT24, so just return
* the format.
*/
if (format == GL_DEPTH_COMPONENT)
return format;
break;
/* OES_texture_float and OES_texture_half_float */
case GL_FLOAT:
if (format == GL_DEPTH_COMPONENT)
return GL_DEPTH_COMPONENT32F;
/* fall through */
case GL_HALF_FLOAT_OES:
switch (format) {
case GL_RGBA:
case GL_RGB:
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE:
case GL_ALPHA:
case GL_RED:
case GL_RG:
return format;
}
break;
case GL_HALF_FLOAT:
switch (format) {
case GL_RG:
case GL_RED:
return format;
}
break;
/* GL_EXT_texture_type_2_10_10_10_REV */
case GL_UNSIGNED_INT_2_10_10_10_REV:
switch (format) {
case GL_RGBA:
case GL_RGB:
return format;
}
break;
default:
/* fall through and return NONE */
break;
}
return GL_NONE;
}
/**
* Do error checking of format/type combinations for OpenGL ES 3
* glTex[Sub]Image.
* \return error code, or GL_NO_ERROR.
*/
GLenum
_mesa_es3_error_check_format_and_type(const struct gl_context *ctx,
GLenum format, GLenum type,
GLenum internalFormat)
{
/* If internalFormat is an unsized format, then the effective internal
* format derived from format and type should be used instead. Page 127,
* section "3.8 Texturing" of the GLES 3.0.4 spec states:
*
* "if internalformat is a base internal format, the effective
* internal format is a sized internal format that is derived
* from the format and type for internal use by the GL.
* Table 3.12 specifies the mapping of format and type to effective
* internal formats. The effective internal format is used by the GL
* for purposes such as texture completeness or type checks for
* CopyTex* commands. In these cases, the GL is required to operate
* as if the effective internal format was used as the internalformat
* when specifying the texture data."
*/
if (_mesa_is_enum_format_unsized(internalFormat)) {
GLenum effectiveInternalFormat =
_mesa_es3_effective_internal_format_for_format_and_type(format, type);
if (effectiveInternalFormat == GL_NONE)
return GL_INVALID_OPERATION;
GLenum baseInternalFormat =
_mesa_base_tex_format(ctx, effectiveInternalFormat);
if (internalFormat != baseInternalFormat)
return GL_INVALID_OPERATION;
internalFormat = effectiveInternalFormat;
}
switch (format) {
case GL_RGBA:
switch (type) {
case GL_UNSIGNED_BYTE:
switch (internalFormat) {
case GL_RGBA:
case GL_RGBA8:
case GL_RGB5_A1:
case GL_RGBA4:
case GL_SRGB8_ALPHA8_EXT:
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_BYTE:
if (internalFormat != GL_RGBA8_SNORM)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_SHORT_4_4_4_4:
switch (internalFormat) {
case GL_RGBA:
case GL_RGBA4:
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_UNSIGNED_SHORT_5_5_5_1:
switch (internalFormat) {
case GL_RGBA:
case GL_RGB5_A1:
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_UNSIGNED_INT_2_10_10_10_REV:
switch (internalFormat) {
case GL_RGBA: /* GL_EXT_texture_type_2_10_10_10_REV */
case GL_RGB10_A2:
case GL_RGB5_A1:
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_HALF_FLOAT:
if (internalFormat != GL_RGBA16F)
return GL_INVALID_OPERATION;
break;
case GL_FLOAT:
switch (internalFormat) {
case GL_RGBA16F:
case GL_RGBA32F:
break;
case GL_RGBA:
if (ctx->Extensions.OES_texture_float && internalFormat == format)
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_HALF_FLOAT_OES:
if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_RGBA_INTEGER:
switch (type) {
case GL_UNSIGNED_BYTE:
if (internalFormat != GL_RGBA8UI)
return GL_INVALID_OPERATION;
break;
case GL_BYTE:
if (internalFormat != GL_RGBA8I)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_SHORT:
if (internalFormat != GL_RGBA16UI)
return GL_INVALID_OPERATION;
break;
case GL_SHORT:
if (internalFormat != GL_RGBA16I)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_INT:
if (internalFormat != GL_RGBA32UI)
return GL_INVALID_OPERATION;
break;
case GL_INT:
if (internalFormat != GL_RGBA32I)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_INT_2_10_10_10_REV:
if (internalFormat != GL_RGB10_A2UI)
return GL_INVALID_OPERATION;
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_RGB:
switch (type) {
case GL_UNSIGNED_BYTE:
switch (internalFormat) {
case GL_RGB:
case GL_RGB8:
case GL_RGB565:
case GL_SRGB8:
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_BYTE:
if (internalFormat != GL_RGB8_SNORM)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_SHORT_5_6_5:
switch (internalFormat) {
case GL_RGB:
case GL_RGB565:
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_UNSIGNED_INT_10F_11F_11F_REV:
if (internalFormat != GL_R11F_G11F_B10F)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_INT_5_9_9_9_REV:
if (internalFormat != GL_RGB9_E5)
return GL_INVALID_OPERATION;
break;
case GL_HALF_FLOAT:
switch (internalFormat) {
case GL_RGB16F:
case GL_R11F_G11F_B10F:
case GL_RGB9_E5:
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_FLOAT:
switch (internalFormat) {
case GL_RGB16F:
case GL_RGB32F:
case GL_R11F_G11F_B10F:
case GL_RGB9_E5:
break;
case GL_RGB:
if (ctx->Extensions.OES_texture_float && internalFormat == format)
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_HALF_FLOAT_OES:
if (!ctx->Extensions.OES_texture_half_float || internalFormat != format)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_INT_2_10_10_10_REV:
switch (internalFormat) {
case GL_RGB: /* GL_EXT_texture_type_2_10_10_10_REV */
break;
default:
return GL_INVALID_OPERATION;
}
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_RGB_INTEGER:
switch (type) {
case GL_UNSIGNED_BYTE:
if (internalFormat != GL_RGB8UI)
return GL_INVALID_OPERATION;
break;
case GL_BYTE:
if (internalFormat != GL_RGB8I)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_SHORT:
if (internalFormat != GL_RGB16UI)
return GL_INVALID_OPERATION;
break;
case GL_SHORT:
if (internalFormat != GL_RGB16I)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_INT:
if (internalFormat != GL_RGB32UI)
return GL_INVALID_OPERATION;
break;
case GL_INT:
if (internalFormat != GL_RGB32I)
return GL_INVALID_OPERATION;
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_RG:
switch (type) {
case GL_UNSIGNED_BYTE:
if (internalFormat != GL_RG8)
return GL_INVALID_OPERATION;
break;
case GL_BYTE:
if (internalFormat != GL_RG8_SNORM)
return GL_INVALID_OPERATION;
break;
case GL_HALF_FLOAT:
case GL_HALF_FLOAT_OES:
switch (internalFormat) {
case GL_RG16F:
break;
case GL_RG:
if (ctx->Extensions.ARB_texture_rg &&
ctx->Extensions.OES_texture_half_float)
break;
/* fallthrough */
default:
return GL_INVALID_OPERATION;
}
break;
case GL_FLOAT:
switch (internalFormat) {
case GL_RG16F:
case GL_RG32F:
break;
case GL_RG:
if (ctx->Extensions.ARB_texture_rg &&
ctx->Extensions.OES_texture_float)
break;
/* fallthrough */
default:
return GL_INVALID_OPERATION;
}
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_RG_INTEGER:
switch (type) {
case GL_UNSIGNED_BYTE:
if (internalFormat != GL_RG8UI)
return GL_INVALID_OPERATION;
break;
case GL_BYTE:
if (internalFormat != GL_RG8I)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_SHORT:
if (internalFormat != GL_RG16UI)
return GL_INVALID_OPERATION;
break;
case GL_SHORT:
if (internalFormat != GL_RG16I)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_INT:
if (internalFormat != GL_RG32UI)
return GL_INVALID_OPERATION;
break;
case GL_INT:
if (internalFormat != GL_RG32I)
return GL_INVALID_OPERATION;
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_RED:
switch (type) {
case GL_UNSIGNED_BYTE:
if (internalFormat != GL_R8)
return GL_INVALID_OPERATION;
break;
case GL_BYTE:
if (internalFormat != GL_R8_SNORM)
return GL_INVALID_OPERATION;
break;
case GL_HALF_FLOAT:
case GL_HALF_FLOAT_OES:
switch (internalFormat) {
case GL_R16F:
break;
case GL_RG:
case GL_RED:
if (ctx->Extensions.ARB_texture_rg &&
ctx->Extensions.OES_texture_half_float)
break;
/* fallthrough */
default:
return GL_INVALID_OPERATION;
}
break;
case GL_FLOAT:
switch (internalFormat) {
case GL_R16F:
case GL_R32F:
break;
case GL_RED:
if (ctx->Extensions.ARB_texture_rg &&
ctx->Extensions.OES_texture_float)
break;
/* fallthrough */
default:
return GL_INVALID_OPERATION;
}
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_RED_INTEGER:
switch (type) {
case GL_UNSIGNED_BYTE:
if (internalFormat != GL_R8UI)
return GL_INVALID_OPERATION;
break;
case GL_BYTE:
if (internalFormat != GL_R8I)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_SHORT:
if (internalFormat != GL_R16UI)
return GL_INVALID_OPERATION;
break;
case GL_SHORT:
if (internalFormat != GL_R16I)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_INT:
if (internalFormat != GL_R32UI)
return GL_INVALID_OPERATION;
break;
case GL_INT:
if (internalFormat != GL_R32I)
return GL_INVALID_OPERATION;
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_DEPTH_COMPONENT:
switch (type) {
case GL_UNSIGNED_SHORT:
if (internalFormat != GL_DEPTH_COMPONENT
&& internalFormat != GL_DEPTH_COMPONENT16)
return GL_INVALID_OPERATION;
break;
case GL_UNSIGNED_INT:
switch (internalFormat) {
case GL_DEPTH_COMPONENT:
case GL_DEPTH_COMPONENT16:
case GL_DEPTH_COMPONENT24:
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_FLOAT:
if (internalFormat != GL_DEPTH_COMPONENT32F)
return GL_INVALID_OPERATION;
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_DEPTH_STENCIL:
switch (type) {
case GL_UNSIGNED_INT_24_8:
if (internalFormat != GL_DEPTH_STENCIL
&& internalFormat != GL_DEPTH24_STENCIL8)
return GL_INVALID_OPERATION;
break;
case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
if (internalFormat != GL_DEPTH32F_STENCIL8)
return GL_INVALID_OPERATION;
break;
default:
return GL_INVALID_OPERATION;
}
break;
case GL_ALPHA:
case GL_LUMINANCE:
case GL_LUMINANCE_ALPHA:
switch (type) {
case GL_FLOAT:
if (ctx->Extensions.OES_texture_float && internalFormat == format)
break;
case GL_HALF_FLOAT_OES:
if (ctx->Extensions.OES_texture_half_float && internalFormat == format)
break;
default:
if (type != GL_UNSIGNED_BYTE || format != internalFormat)
return GL_INVALID_OPERATION;
}
}
return GL_NO_ERROR;
}
static void
set_swizzle(uint8_t *swizzle, int x, int y, int z, int w)
{
swizzle[MESA_FORMAT_SWIZZLE_X] = x;
swizzle[MESA_FORMAT_SWIZZLE_Y] = y;
swizzle[MESA_FORMAT_SWIZZLE_Z] = z;
swizzle[MESA_FORMAT_SWIZZLE_W] = w;
}
static bool
get_swizzle_from_gl_format(GLenum format, uint8_t *swizzle)
{
switch (format) {
case GL_RGBA:
case GL_RGBA_INTEGER_EXT:
set_swizzle(swizzle, 0, 1, 2, 3);
return true;
case GL_BGRA:
case GL_BGRA_INTEGER_EXT:
set_swizzle(swizzle, 2, 1, 0, 3);
return true;
case GL_ABGR_EXT:
set_swizzle(swizzle, 3, 2, 1, 0);
return true;
case GL_RGB:
case GL_RGB_INTEGER_EXT:
set_swizzle(swizzle, 0, 1, 2, 5);
return true;
case GL_BGR:
case GL_BGR_INTEGER_EXT:
set_swizzle(swizzle, 2, 1, 0, 5);
return true;
case GL_LUMINANCE_ALPHA:
case GL_LUMINANCE_ALPHA_INTEGER_EXT:
set_swizzle(swizzle, 0, 0, 0, 1);
return true;
case GL_RG:
case GL_RG_INTEGER:
set_swizzle(swizzle, 0, 1, 4, 5);
return true;
case GL_RED:
case GL_RED_INTEGER_EXT:
set_swizzle(swizzle, 0, 4, 4, 5);
return true;
case GL_GREEN:
case GL_GREEN_INTEGER_EXT:
set_swizzle(swizzle, 4, 0, 4, 5);
return true;
case GL_BLUE:
case GL_BLUE_INTEGER_EXT:
set_swizzle(swizzle, 4, 4, 0, 5);
return true;
case GL_ALPHA:
case GL_ALPHA_INTEGER_EXT:
set_swizzle(swizzle, 4, 4, 4, 0);
return true;
case GL_LUMINANCE:
case GL_LUMINANCE_INTEGER_EXT:
set_swizzle(swizzle, 0, 0, 0, 5);
return true;
case GL_INTENSITY:
set_swizzle(swizzle, 0, 0, 0, 0);
return true;
default:
return false;
}
}
/**
* Take an OpenGL format (GL_RGB, GL_RGBA, etc), OpenGL data type (GL_INT,
* GL_FOAT, etc) and return a matching mesa_array_format or a mesa_format
* otherwise (for non-array formats).
*
* This function will typically be used to compute a mesa format from a GL type
* so we can then call _mesa_format_convert. This function does
* not consider byte swapping, so it returns types assuming that no byte
* swapping is involved. If byte swapping is involved then clients are supposed
* to handle that on their side before calling _mesa_format_convert.
*
* This function returns an uint32_t that can pack a mesa_format or a
* mesa_array_format. Clients must check the mesa array format bit
* (MESA_ARRAY_FORMAT_BIT) on the return value to know if the returned
* format is a mesa_array_format or a mesa_format.
*/
uint32_t
_mesa_format_from_format_and_type(GLenum format, GLenum type)
{
bool is_array_format = true;
uint8_t swizzle[4];
bool normalized = false, is_float = false, is_signed = false;
int num_channels = 0, type_size = 0;
/* Extract array format type information from the OpenGL data type */
switch (type) {
case GL_UNSIGNED_BYTE:
type_size = 1;
break;
case GL_BYTE:
type_size = 1;
is_signed = true;
break;
case GL_UNSIGNED_SHORT:
type_size = 2;
break;
case GL_SHORT:
type_size = 2;
is_signed = true;
break;
case GL_UNSIGNED_INT:
type_size = 4;
break;
case GL_INT:
type_size = 4;
is_signed = true;
break;
case GL_HALF_FLOAT:
case GL_HALF_FLOAT_OES:
type_size = 2;
is_signed = true;
is_float = true;
break;
case GL_FLOAT:
type_size = 4;
is_signed = true;
is_float = true;
break;
default:
is_array_format = false;
break;
}
/* Extract array format swizzle information from the OpenGL format */
if (is_array_format)
is_array_format = get_swizzle_from_gl_format(format, swizzle);
/* If this is an array format type after checking data type and format,
* create the array format
*/
if (is_array_format) {
normalized = !_mesa_is_enum_format_integer(format);
num_channels = _mesa_components_in_format(format);
return MESA_ARRAY_FORMAT(type_size, is_signed, is_float,
normalized, num_channels,
swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
}
/* Otherwise this is not an array format, so return the mesa_format
* matching the OpenGL format and data type
*/
switch (type) {
case GL_UNSIGNED_SHORT_5_6_5:
if (format == GL_RGB)
return MESA_FORMAT_B5G6R5_UNORM;
else if (format == GL_BGR)
return MESA_FORMAT_R5G6B5_UNORM;
else if (format == GL_RGB_INTEGER)
return MESA_FORMAT_B5G6R5_UINT;
break;
case GL_UNSIGNED_SHORT_5_6_5_REV:
if (format == GL_RGB)
return MESA_FORMAT_R5G6B5_UNORM;
else if (format == GL_BGR)
return MESA_FORMAT_B5G6R5_UNORM;
else if (format == GL_RGB_INTEGER)
return MESA_FORMAT_R5G6B5_UINT;
break;
case GL_UNSIGNED_SHORT_4_4_4_4:
if (format == GL_RGBA)
return MESA_FORMAT_A4B4G4R4_UNORM;
else if (format == GL_BGRA)
return MESA_FORMAT_A4R4G4B4_UNORM;
else if (format == GL_ABGR_EXT)
return MESA_FORMAT_R4G4B4A4_UNORM;
else if (format == GL_RGBA_INTEGER)
return MESA_FORMAT_A4B4G4R4_UINT;
else if (format == GL_BGRA_INTEGER)
return MESA_FORMAT_A4R4G4B4_UINT;
break;
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
if (format == GL_RGBA)
return MESA_FORMAT_R4G4B4A4_UNORM;
else if (format == GL_BGRA)
return MESA_FORMAT_B4G4R4A4_UNORM;
else if (format == GL_ABGR_EXT)
return MESA_FORMAT_A4B4G4R4_UNORM;
else if (format == GL_RGBA_INTEGER)
return MESA_FORMAT_R4G4B4A4_UINT;
else if (format == GL_BGRA_INTEGER)
return MESA_FORMAT_B4G4R4A4_UINT;
break;
case GL_UNSIGNED_SHORT_5_5_5_1:
if (format == GL_RGBA)
return MESA_FORMAT_A1B5G5R5_UNORM;
else if (format == GL_BGRA)
return MESA_FORMAT_A1R5G5B5_UNORM;
else if (format == GL_RGBA_INTEGER)
return MESA_FORMAT_A1B5G5R5_UINT;
else if (format == GL_BGRA_INTEGER)
return MESA_FORMAT_A1R5G5B5_UINT;
break;
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
if (format == GL_RGBA)
return MESA_FORMAT_R5G5B5A1_UNORM;
else if (format == GL_BGRA)
return MESA_FORMAT_B5G5R5A1_UNORM;
else if (format == GL_RGBA_INTEGER)
return MESA_FORMAT_R5G5B5A1_UINT;
else if (format == GL_BGRA_INTEGER)
return MESA_FORMAT_B5G5R5A1_UINT;
break;
case GL_UNSIGNED_BYTE_3_3_2:
if (format == GL_RGB)
return MESA_FORMAT_B2G3R3_UNORM;
else if (format == GL_RGB_INTEGER)
return MESA_FORMAT_B2G3R3_UINT;
break;
case GL_UNSIGNED_BYTE_2_3_3_REV:
if (format == GL_RGB)
return MESA_FORMAT_R3G3B2_UNORM;
else if (format == GL_RGB_INTEGER)
return MESA_FORMAT_R3G3B2_UINT;
break;
case GL_UNSIGNED_INT_5_9_9_9_REV:
if (format == GL_RGB)
return MESA_FORMAT_R9G9B9E5_FLOAT;
break;
case GL_UNSIGNED_INT_10_10_10_2:
if (format == GL_RGBA)
return MESA_FORMAT_A2B10G10R10_UNORM;
else if (format == GL_RGBA_INTEGER)
return MESA_FORMAT_A2B10G10R10_UINT;
else if (format == GL_BGRA)
return MESA_FORMAT_A2R10G10B10_UNORM;
else if (format == GL_BGRA_INTEGER)
return MESA_FORMAT_A2R10G10B10_UINT;
break;
case GL_UNSIGNED_INT_2_10_10_10_REV:
if (format == GL_RGB)
return MESA_FORMAT_R10G10B10X2_UNORM;
if (format == GL_RGBA)
return MESA_FORMAT_R10G10B10A2_UNORM;
else if (format == GL_RGBA_INTEGER)
return MESA_FORMAT_R10G10B10A2_UINT;
else if (format == GL_BGRA)
return MESA_FORMAT_B10G10R10A2_UNORM;
else if (format == GL_BGRA_INTEGER)
return MESA_FORMAT_B10G10R10A2_UINT;
break;
case GL_UNSIGNED_INT_8_8_8_8:
if (format == GL_RGBA)
return MESA_FORMAT_A8B8G8R8_UNORM;
else if (format == GL_BGRA)
return MESA_FORMAT_A8R8G8B8_UNORM;
else if (format == GL_ABGR_EXT)
return MESA_FORMAT_R8G8B8A8_UNORM;
else if (format == GL_RGBA_INTEGER)
return MESA_FORMAT_A8B8G8R8_UINT;
else if (format == GL_BGRA_INTEGER)
return MESA_FORMAT_A8R8G8B8_UINT;
break;
case GL_UNSIGNED_INT_8_8_8_8_REV:
if (format == GL_RGBA)
return MESA_FORMAT_R8G8B8A8_UNORM;
else if (format == GL_BGRA)
return MESA_FORMAT_B8G8R8A8_UNORM;
else if (format == GL_ABGR_EXT)
return MESA_FORMAT_A8B8G8R8_UNORM;
else if (format == GL_RGBA_INTEGER)
return MESA_FORMAT_R8G8B8A8_UINT;
else if (format == GL_BGRA_INTEGER)
return MESA_FORMAT_B8G8R8A8_UINT;
break;
case GL_UNSIGNED_SHORT_8_8_MESA:
if (format == GL_YCBCR_MESA)
return MESA_FORMAT_YCBCR;
break;
case GL_UNSIGNED_SHORT_8_8_REV_MESA:
if (format == GL_YCBCR_MESA)
return MESA_FORMAT_YCBCR_REV;
break;
case GL_UNSIGNED_INT_10F_11F_11F_REV:
if (format == GL_RGB)
return MESA_FORMAT_R11G11B10_FLOAT;
default:
break;
}
/* If we got here it means that we could not find a Mesa format that
* matches the GL format/type provided. We may need to add a new Mesa
* format in that case.
*/
unreachable("Unsupported format");
}