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reactos/dll/opengl/mesa/main/formats.c

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/*
* Mesa 3-D graphics library
* Version: 7.7
*
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
* Copyright (c) 2008-2009 VMware, Inc.
*
* 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
* BRIAN PAUL 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 <precomp.h>
/**
* Information about texture formats.
*/
struct gl_format_info
{
gl_format Name;
/** text name for debugging */
const char *StrName;
/**
* Base format is one of GL_RED, GL_RG, GL_RGB, GL_RGBA, GL_ALPHA,
* GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY, GL_YCBCR_MESA,
* GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
*/
GLenum BaseFormat;
/**
* Logical data type: one of GL_UNSIGNED_NORMALIZED, GL_SIGNED_NORMALIZED,
* GL_UNSIGNED_INT, GL_INT, GL_FLOAT.
*/
GLenum DataType;
GLubyte RedBits;
GLubyte GreenBits;
GLubyte BlueBits;
GLubyte AlphaBits;
GLubyte LuminanceBits;
GLubyte IntensityBits;
GLubyte IndexBits;
GLubyte DepthBits;
GLubyte StencilBits;
/**
* To describe compressed formats. If not compressed, Width=Height=1.
*/
GLubyte BlockWidth, BlockHeight;
GLubyte BytesPerBlock;
};
/**
* Info about each format.
* These must be in the same order as the MESA_FORMAT_* enums so that
* we can do lookups without searching.
*/
static struct gl_format_info format_info[MESA_FORMAT_COUNT] =
{
{
MESA_FORMAT_NONE, /* Name */
"MESA_FORMAT_NONE", /* StrName */
GL_NONE, /* BaseFormat */
GL_NONE, /* DataType */
0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
0, 0, 0 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_RGBA8888, /* Name */
"MESA_FORMAT_RGBA8888", /* StrName */
GL_RGBA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
8, 8, 8, 8, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_RGBA8888_REV, /* Name */
"MESA_FORMAT_RGBA8888_REV", /* StrName */
GL_RGBA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
8, 8, 8, 8, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_ARGB8888, /* Name */
"MESA_FORMAT_ARGB8888", /* StrName */
GL_RGBA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
8, 8, 8, 8, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_ARGB8888_REV, /* Name */
"MESA_FORMAT_ARGB8888_REV", /* StrName */
GL_RGBA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
8, 8, 8, 8, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_RGBX8888, /* Name */
"MESA_FORMAT_RGBX8888", /* StrName */
GL_RGB, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
8, 8, 8, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_RGBX8888_REV, /* Name */
"MESA_FORMAT_RGBX8888_REV", /* StrName */
GL_RGB, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
8, 8, 8, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_XRGB8888, /* Name */
"MESA_FORMAT_XRGB8888", /* StrName */
GL_RGB, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
8, 8, 8, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_XRGB8888_REV, /* Name */
"MESA_FORMAT_XRGB8888_REV", /* StrName */
GL_RGB, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
8, 8, 8, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_RGB888, /* Name */
"MESA_FORMAT_RGB888", /* StrName */
GL_RGB, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
8, 8, 8, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 3 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_BGR888, /* Name */
"MESA_FORMAT_BGR888", /* StrName */
GL_RGB, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
8, 8, 8, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 3 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_RGB565, /* Name */
"MESA_FORMAT_RGB565", /* StrName */
GL_RGB, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
5, 6, 5, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_RGB565_REV, /* Name */
"MESA_FORMAT_RGB565_REV", /* StrName */
GL_RGB, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
5, 6, 5, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_ARGB4444, /* Name */
"MESA_FORMAT_ARGB4444", /* StrName */
GL_RGBA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
4, 4, 4, 4, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_ARGB4444_REV, /* Name */
"MESA_FORMAT_ARGB4444_REV", /* StrName */
GL_RGBA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
4, 4, 4, 4, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_RGBA5551, /* Name */
"MESA_FORMAT_RGBA5551", /* StrName */
GL_RGBA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
5, 5, 5, 1, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_ARGB1555, /* Name */
"MESA_FORMAT_ARGB1555", /* StrName */
GL_RGBA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
5, 5, 5, 1, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_ARGB1555_REV, /* Name */
"MESA_FORMAT_ARGB1555_REV", /* StrName */
GL_RGBA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
5, 5, 5, 1, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_AL44, /* Name */
"MESA_FORMAT_AL44", /* StrName */
GL_LUMINANCE_ALPHA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 4, /* Red/Green/Blue/AlphaBits */
4, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 1 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_AL88, /* Name */
"MESA_FORMAT_AL88", /* StrName */
GL_LUMINANCE_ALPHA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 8, /* Red/Green/Blue/AlphaBits */
8, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_AL88_REV, /* Name */
"MESA_FORMAT_AL88_REV", /* StrName */
GL_LUMINANCE_ALPHA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 8, /* Red/Green/Blue/AlphaBits */
8, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_AL1616, /* Name */
"MESA_FORMAT_AL1616", /* StrName */
GL_LUMINANCE_ALPHA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 16, /* Red/Green/Blue/AlphaBits */
16, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_AL1616_REV, /* Name */
"MESA_FORMAT_AL1616_REV", /* StrName */
GL_LUMINANCE_ALPHA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 16, /* Red/Green/Blue/AlphaBits */
16, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_RGB332, /* Name */
"MESA_FORMAT_RGB332", /* StrName */
GL_RGB, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
3, 3, 2, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 1 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_A8, /* Name */
"MESA_FORMAT_A8", /* StrName */
GL_ALPHA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 8, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 1 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_A16, /* Name */
"MESA_FORMAT_A16", /* StrName */
GL_ALPHA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 16, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_L8, /* Name */
"MESA_FORMAT_L8", /* StrName */
GL_LUMINANCE, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
8, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 1 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_L16, /* Name */
"MESA_FORMAT_L16", /* StrName */
GL_LUMINANCE, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
16, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_I8, /* Name */
"MESA_FORMAT_I8", /* StrName */
GL_INTENSITY, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
0, 8, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 1 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_I16, /* Name */
"MESA_FORMAT_I16", /* StrName */
GL_INTENSITY, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
0, 16, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_YCBCR, /* Name */
"MESA_FORMAT_YCBCR", /* StrName */
GL_YCBCR_MESA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_YCBCR_REV, /* Name */
"MESA_FORMAT_YCBCR_REV", /* StrName */
GL_YCBCR_MESA, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_Z16, /* Name */
"MESA_FORMAT_Z16", /* StrName */
GL_DEPTH_COMPONENT, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 16, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 2 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_X8_Z24, /* Name */
"MESA_FORMAT_X8_Z24", /* StrName */
GL_DEPTH_COMPONENT, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 24, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_Z24_X8, /* Name */
"MESA_FORMAT_Z24_X8", /* StrName */
GL_DEPTH_COMPONENT, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 24, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_Z32, /* Name */
"MESA_FORMAT_Z32", /* StrName */
GL_DEPTH_COMPONENT, /* BaseFormat */
GL_UNSIGNED_NORMALIZED, /* DataType */
0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 32, 0, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 4 /* BlockWidth/Height,Bytes */
},
{
MESA_FORMAT_S8, /* Name */
"MESA_FORMAT_S8", /* StrName */
GL_STENCIL_INDEX, /* BaseFormat */
GL_UNSIGNED_INT, /* DataType */
0, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
0, 0, 0, 0, 8, /* Lum/Int/Index/Depth/StencilBits */
1, 1, 1 /* BlockWidth/Height,Bytes */
},
/* unnormalized unsigned int formats */
{
MESA_FORMAT_ALPHA_UINT8,
"MESA_FORMAT_ALPHA_UINT8",
GL_ALPHA,
GL_UNSIGNED_INT,
0, 0, 0, 8,
0, 0, 0, 0, 0,
1, 1, 1
},
{
MESA_FORMAT_ALPHA_UINT16,
"MESA_FORMAT_ALPHA_UINT16",
GL_ALPHA,
GL_UNSIGNED_INT,
0, 0, 0, 16,
0, 0, 0, 0, 0,
1, 1, 2
},
{
MESA_FORMAT_ALPHA_UINT32,
"MESA_FORMAT_ALPHA_UINT32",
GL_ALPHA,
GL_UNSIGNED_INT,
0, 0, 0, 32,
0, 0, 0, 0, 0,
1, 1, 4
},
{
MESA_FORMAT_ALPHA_INT8,
"MESA_FORMAT_ALPHA_INT8",
GL_ALPHA,
GL_INT,
0, 0, 0, 8,
0, 0, 0, 0, 0,
1, 1, 1
},
{
MESA_FORMAT_ALPHA_INT16,
"MESA_FORMAT_ALPHA_INT16",
GL_ALPHA,
GL_INT,
0, 0, 0, 16,
0, 0, 0, 0, 0,
1, 1, 2
},
{
MESA_FORMAT_ALPHA_INT32,
"MESA_FORMAT_ALPHA_INT32",
GL_ALPHA,
GL_INT,
0, 0, 0, 32,
0, 0, 0, 0, 0,
1, 1, 4
},
{
MESA_FORMAT_INTENSITY_UINT8,
"MESA_FORMAT_INTENSITY_UINT8",
GL_INTENSITY,
GL_UNSIGNED_INT,
0, 0, 0, 0,
0, 8, 0, 0, 0,
1, 1, 1
},
{
MESA_FORMAT_INTENSITY_UINT16,
"MESA_FORMAT_INTENSITY_UINT16",
GL_INTENSITY,
GL_UNSIGNED_INT,
0, 0, 0, 0,
0, 16, 0, 0, 0,
1, 1, 2
},
{
MESA_FORMAT_INTENSITY_UINT32,
"MESA_FORMAT_INTENSITY_UINT32",
GL_INTENSITY,
GL_UNSIGNED_INT,
0, 0, 0, 0,
0, 32, 0, 0, 0,
1, 1, 4
},
{
MESA_FORMAT_INTENSITY_INT8,
"MESA_FORMAT_INTENSITY_INT8",
GL_INTENSITY,
GL_INT,
0, 0, 0, 0,
0, 8, 0, 0, 0,
1, 1, 1
},
{
MESA_FORMAT_INTENSITY_INT16,
"MESA_FORMAT_INTENSITY_INT16",
GL_INTENSITY,
GL_INT,
0, 0, 0, 0,
0, 16, 0, 0, 0,
1, 1, 2
},
{
MESA_FORMAT_INTENSITY_INT32,
"MESA_FORMAT_INTENSITY_INT32",
GL_INTENSITY,
GL_INT,
0, 0, 0, 0,
0, 32, 0, 0, 0,
1, 1, 4
},
{
MESA_FORMAT_LUMINANCE_UINT8,
"MESA_FORMAT_LUMINANCE_UINT8",
GL_LUMINANCE,
GL_UNSIGNED_INT,
0, 0, 0, 0,
8, 0, 0, 0, 0,
1, 1, 1
},
{
MESA_FORMAT_LUMINANCE_UINT16,
"MESA_FORMAT_LUMINANCE_UINT16",
GL_LUMINANCE,
GL_UNSIGNED_INT,
0, 0, 0, 0,
16, 0, 0, 0, 0,
1, 1, 2
},
{
MESA_FORMAT_LUMINANCE_UINT32,
"MESA_FORMAT_LUMINANCE_UINT32",
GL_LUMINANCE,
GL_UNSIGNED_INT,
0, 0, 0, 0,
32, 0, 0, 0, 0,
1, 1, 4
},
{
MESA_FORMAT_LUMINANCE_INT8,
"MESA_FORMAT_LUMINANCE_INT8",
GL_LUMINANCE,
GL_INT,
0, 0, 0, 0,
8, 0, 0, 0, 0,
1, 1, 1
},
{
MESA_FORMAT_LUMINANCE_INT16,
"MESA_FORMAT_LUMINANCE_INT16",
GL_LUMINANCE,
GL_INT,
0, 0, 0, 0,
16, 0, 0, 0, 0,
1, 1, 2
},
{
MESA_FORMAT_LUMINANCE_INT32,
"MESA_FORMAT_LUMINANCE_INT32",
GL_LUMINANCE,
GL_INT,
0, 0, 0, 0,
32, 0, 0, 0, 0,
1, 1, 4
},
{
MESA_FORMAT_LUMINANCE_ALPHA_UINT8,
"MESA_FORMAT_LUMINANCE_ALPHA_UINT8",
GL_LUMINANCE_ALPHA,
GL_UNSIGNED_INT,
0, 0, 0, 8,
8, 0, 0, 0, 0,
1, 1, 2
},
{
MESA_FORMAT_LUMINANCE_ALPHA_UINT16,
"MESA_FORMAT_LUMINANCE_ALPHA_UINT16",
GL_LUMINANCE_ALPHA,
GL_UNSIGNED_INT,
0, 0, 0, 16,
16, 0, 0, 0, 0,
1, 1, 4
},
{
MESA_FORMAT_LUMINANCE_ALPHA_UINT32,
"MESA_FORMAT_LUMINANCE_ALPHA_UINT32",
GL_LUMINANCE_ALPHA,
GL_UNSIGNED_INT,
0, 0, 0, 32,
32, 0, 0, 0, 0,
1, 1, 8
},
{
MESA_FORMAT_LUMINANCE_ALPHA_INT8,
"MESA_FORMAT_LUMINANCE_ALPHA_INT8",
GL_LUMINANCE_ALPHA,
GL_INT,
0, 0, 0, 8,
8, 0, 0, 0, 0,
1, 1, 2
},
{
MESA_FORMAT_LUMINANCE_ALPHA_INT16,
"MESA_FORMAT_LUMINANCE_ALPHA_INT16",
GL_LUMINANCE_ALPHA,
GL_INT,
0, 0, 0, 16,
16, 0, 0, 0, 0,
1, 1, 4
},
{
MESA_FORMAT_LUMINANCE_ALPHA_INT32,
"MESA_FORMAT_LUMINANCE_ALPHA_INT32",
GL_LUMINANCE_ALPHA,
GL_INT,
0, 0, 0, 32,
32, 0, 0, 0, 0,
1, 1, 8
},
{
MESA_FORMAT_RGB_INT8,
"MESA_FORMAT_RGB_INT8",
GL_RGB,
GL_INT,
8, 8, 8, 0,
0, 0, 0, 0, 0,
1, 1, 3
},
{
MESA_FORMAT_RGBA_INT8,
"MESA_FORMAT_RGBA_INT8",
GL_RGBA,
GL_INT,
8, 8, 8, 8,
0, 0, 0, 0, 0,
1, 1, 4
},
{
MESA_FORMAT_RGB_INT16,
"MESA_FORMAT_RGB_INT16",
GL_RGB,
GL_INT,
16, 16, 16, 0,
0, 0, 0, 0, 0,
1, 1, 6
},
{
MESA_FORMAT_RGBA_INT16,
"MESA_FORMAT_RGBA_INT16",
GL_RGBA,
GL_INT,
16, 16, 16, 16,
0, 0, 0, 0, 0,
1, 1, 8
},
{
MESA_FORMAT_RGB_INT32,
"MESA_FORMAT_RGB_INT32",
GL_RGB,
GL_INT,
32, 32, 32, 0,
0, 0, 0, 0, 0,
1, 1, 12
},
{
MESA_FORMAT_RGBA_INT32,
"MESA_FORMAT_RGBA_INT32",
GL_RGBA,
GL_INT,
32, 32, 32, 32,
0, 0, 0, 0, 0,
1, 1, 16
},
{
MESA_FORMAT_RGB_UINT8,
"MESA_FORMAT_RGB_UINT8",
GL_RGB,
GL_UNSIGNED_INT,
8, 8, 8, 0,
0, 0, 0, 0, 0,
1, 1, 3
},
{
MESA_FORMAT_RGBA_UINT8,
"MESA_FORMAT_RGBA_UINT8",
GL_RGBA,
GL_UNSIGNED_INT,
8, 8, 8, 8,
0, 0, 0, 0, 0,
1, 1, 4
},
{
MESA_FORMAT_RGB_UINT16,
"MESA_FORMAT_RGB_UINT16",
GL_RGB,
GL_UNSIGNED_INT,
16, 16, 16, 0,
0, 0, 0, 0, 0,
1, 1, 6
},
{
MESA_FORMAT_RGBA_UINT16,
"MESA_FORMAT_RGBA_UINT16",
GL_RGBA,
GL_UNSIGNED_INT,
16, 16, 16, 16,
0, 0, 0, 0, 0,
1, 1, 8
},
{
MESA_FORMAT_RGB_UINT32,
"MESA_FORMAT_RGB_UINT32",
GL_RGB,
GL_UNSIGNED_INT,
32, 32, 32, 0,
0, 0, 0, 0, 0,
1, 1, 12
},
{
MESA_FORMAT_RGBA_UINT32,
"MESA_FORMAT_RGBA_UINT32",
GL_RGBA,
GL_UNSIGNED_INT,
32, 32, 32, 32,
0, 0, 0, 0, 0,
1, 1, 16
},
{
MESA_FORMAT_SIGNED_RGBA_16,
"MESA_FORMAT_SIGNED_RGBA_16",
GL_RGBA,
GL_SIGNED_NORMALIZED,
16, 16, 16, 16,
0, 0, 0, 0, 0,
1, 1, 8
},
{
MESA_FORMAT_RGBA_16,
"MESA_FORMAT_RGBA_16",
GL_RGBA,
GL_UNSIGNED_NORMALIZED,
16, 16, 16, 16,
0, 0, 0, 0, 0,
1, 1, 8
}
};
static const struct gl_format_info *
_mesa_get_format_info(gl_format format)
{
const struct gl_format_info *info = &format_info[format];
assert(info->Name == format);
return info;
}
/** Return string name of format (for debugging) */
const char *
_mesa_get_format_name(gl_format format)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
return info->StrName;
}
/**
* Return bytes needed to store a block of pixels in the given format.
* Normally, a block is 1x1 (a single pixel). But for compressed formats
* a block may be 4x4 or 8x4, etc.
*
* Note: not GLuint, so as not to coerce math to unsigned. cf. fdo #37351
*/
GLint
_mesa_get_format_bytes(gl_format format)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
ASSERT(info->BytesPerBlock);
ASSERT(info->BytesPerBlock <= MAX_PIXEL_BYTES);
return info->BytesPerBlock;
}
/**
* Return bits per component for the given format.
* \param format one of MESA_FORMAT_x
* \param pname the component, such as GL_RED_BITS, GL_TEXTURE_BLUE_BITS, etc.
*/
GLint
_mesa_get_format_bits(gl_format format, GLenum pname)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
switch (pname) {
case GL_RED_BITS:
case GL_TEXTURE_RED_SIZE:
case GL_RENDERBUFFER_RED_SIZE_EXT:
case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
return info->RedBits;
case GL_GREEN_BITS:
case GL_TEXTURE_GREEN_SIZE:
case GL_RENDERBUFFER_GREEN_SIZE_EXT:
case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
return info->GreenBits;
case GL_BLUE_BITS:
case GL_TEXTURE_BLUE_SIZE:
case GL_RENDERBUFFER_BLUE_SIZE_EXT:
case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
return info->BlueBits;
case GL_ALPHA_BITS:
case GL_TEXTURE_ALPHA_SIZE:
case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
return info->AlphaBits;
case GL_TEXTURE_INTENSITY_SIZE:
return info->IntensityBits;
case GL_TEXTURE_LUMINANCE_SIZE:
return info->LuminanceBits;
case GL_INDEX_BITS:
return info->IndexBits;
case GL_DEPTH_BITS:
case GL_TEXTURE_DEPTH_SIZE_ARB:
case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
return info->DepthBits;
case GL_STENCIL_BITS:
case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
return info->StencilBits;
default:
_mesa_problem(NULL, "bad pname in _mesa_get_format_bits()");
return 0;
}
}
GLuint
_mesa_get_format_max_bits(gl_format format)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
GLuint max = MAX2(info->RedBits, info->GreenBits);
max = MAX2(max, info->BlueBits);
max = MAX2(max, info->AlphaBits);
max = MAX2(max, info->LuminanceBits);
max = MAX2(max, info->IntensityBits);
max = MAX2(max, info->DepthBits);
max = MAX2(max, info->StencilBits);
return max;
}
/**
* Return the data type (or more specifically, the data representation)
* for the given format.
* The return value will be one of:
* GL_UNSIGNED_NORMALIZED = unsigned int representing [0,1]
* GL_SIGNED_NORMALIZED = signed int representing [-1, 1]
* GL_UNSIGNED_INT = an ordinary unsigned integer
* GL_INT = an ordinary signed integer
* GL_FLOAT = an ordinary float
*/
GLenum
_mesa_get_format_datatype(gl_format format)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
return info->DataType;
}
/**
* Return the basic format for the given type. The result will be one of
* GL_RGB, GL_RGBA, GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY,
* GL_YCBCR_MESA, GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
*/
GLenum
_mesa_get_format_base_format(gl_format format)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
return info->BaseFormat;
}
/**
* Return the block size (in pixels) for the given format. Normally
* the block size is 1x1. But compressed formats will have block sizes
* of 4x4 or 8x4 pixels, etc.
* \param bw returns block width in pixels
* \param bh returns block height in pixels
*/
void
_mesa_get_format_block_size(gl_format format, GLuint *bw, GLuint *bh)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
*bw = info->BlockWidth;
*bh = info->BlockHeight;
}
/**
* Is the given format a signed/unsigned integer color format?
*/
GLboolean
_mesa_is_format_integer_color(gl_format format)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT) &&
info->BaseFormat != GL_DEPTH_COMPONENT &&
info->BaseFormat != GL_STENCIL_INDEX;
}
GLuint
_mesa_format_num_components(gl_format format)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
return ((info->RedBits > 0) +
(info->GreenBits > 0) +
(info->BlueBits > 0) +
(info->AlphaBits > 0) +
(info->LuminanceBits > 0) +
(info->IntensityBits > 0) +
(info->DepthBits > 0) +
(info->StencilBits > 0));
}
/**
* Return number of bytes needed to store an image of the given size
* in the given format.
*/
GLuint
_mesa_format_image_size(gl_format format, GLsizei width,
GLsizei height, GLsizei depth)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
/* Strictly speaking, a conditional isn't needed here */
if (info->BlockWidth > 1 || info->BlockHeight > 1) {
/* compressed format (2D only for now) */
const GLuint bw = info->BlockWidth, bh = info->BlockHeight;
const GLuint wblocks = (width + bw - 1) / bw;
const GLuint hblocks = (height + bh - 1) / bh;
const GLuint sz = wblocks * hblocks * info->BytesPerBlock;
assert(depth == 1);
return sz;
}
else {
/* non-compressed */
const GLuint sz = width * height * depth * info->BytesPerBlock;
return sz;
}
}
/**
* Same as _mesa_format_image_size() but returns a 64-bit value to
* accomodate very large textures.
*/
uint64_t
_mesa_format_image_size64(gl_format format, GLsizei width,
GLsizei height, GLsizei depth)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
/* Strictly speaking, a conditional isn't needed here */
if (info->BlockWidth > 1 || info->BlockHeight > 1) {
/* compressed format (2D only for now) */
const uint64_t bw = info->BlockWidth, bh = info->BlockHeight;
const uint64_t wblocks = (width + bw - 1) / bw;
const uint64_t hblocks = (height + bh - 1) / bh;
const uint64_t sz = wblocks * hblocks * info->BytesPerBlock;
assert(depth == 1);
return sz;
}
else {
/* non-compressed */
const uint64_t sz = ((uint64_t) width *
(uint64_t) height *
(uint64_t) depth *
info->BytesPerBlock);
return sz;
}
}
GLint
_mesa_format_row_stride(gl_format format, GLsizei width)
{
const struct gl_format_info *info = _mesa_get_format_info(format);
/* Strictly speaking, a conditional isn't needed here */
if (info->BlockWidth > 1 || info->BlockHeight > 1) {
/* compressed format */
const GLuint bw = info->BlockWidth;
const GLuint wblocks = (width + bw - 1) / bw;
const GLint stride = wblocks * info->BytesPerBlock;
return stride;
}
else {
const GLint stride = width * info->BytesPerBlock;
return stride;
}
}
/**
* Debug/test: check that all formats are handled in the
* _mesa_format_to_type_and_comps() function. When new pixel formats
* are added to Mesa, that function needs to be updated.
* This is a no-op after the first call.
*/
static void
check_format_to_type_and_comps(void)
{
gl_format f;
for (f = MESA_FORMAT_NONE + 1; f < MESA_FORMAT_COUNT; f++) {
GLenum datatype = 0;
GLuint comps = 0;
/* This function will emit a problem/warning if the format is
* not handled.
*/
_mesa_format_to_type_and_comps(f, &datatype, &comps);
}
}
/**
* Do sanity checking of the format info table.
*/
void
_mesa_test_formats(void)
{
GLuint i;
STATIC_ASSERT(Elements(format_info) == MESA_FORMAT_COUNT);
for (i = 0; i < MESA_FORMAT_COUNT; i++) {
const struct gl_format_info *info = _mesa_get_format_info(i);
assert(info);
assert(info->Name == i);
if (info->Name == MESA_FORMAT_NONE)
continue;
if (info->BlockWidth == 1 && info->BlockHeight == 1) {
if (info->RedBits > 0) {
GLuint t = info->RedBits + info->GreenBits
+ info->BlueBits + info->AlphaBits;
assert(t / 8 <= info->BytesPerBlock);
(void) t;
}
}
assert(info->DataType == GL_UNSIGNED_NORMALIZED ||
info->DataType == GL_SIGNED_NORMALIZED ||
info->DataType == GL_UNSIGNED_INT ||
info->DataType == GL_INT ||
info->DataType == GL_FLOAT ||
/* Z32_FLOAT_X24S8 has DataType of GL_NONE */
info->DataType == GL_NONE);
if (info->BaseFormat == GL_RGB) {
assert(info->RedBits > 0);
assert(info->GreenBits > 0);
assert(info->BlueBits > 0);
assert(info->AlphaBits == 0);
assert(info->LuminanceBits == 0);
assert(info->IntensityBits == 0);
}
else if (info->BaseFormat == GL_RGBA) {
assert(info->RedBits > 0);
assert(info->GreenBits > 0);
assert(info->BlueBits > 0);
assert(info->AlphaBits > 0);
assert(info->LuminanceBits == 0);
assert(info->IntensityBits == 0);
}
else if (info->BaseFormat == GL_RG) {
assert(info->RedBits > 0);
assert(info->GreenBits > 0);
assert(info->BlueBits == 0);
assert(info->AlphaBits == 0);
assert(info->LuminanceBits == 0);
assert(info->IntensityBits == 0);
}
else if (info->BaseFormat == GL_RED) {
assert(info->RedBits > 0);
assert(info->GreenBits == 0);
assert(info->BlueBits == 0);
assert(info->AlphaBits == 0);
assert(info->LuminanceBits == 0);
assert(info->IntensityBits == 0);
}
else if (info->BaseFormat == GL_LUMINANCE) {
assert(info->RedBits == 0);
assert(info->GreenBits == 0);
assert(info->BlueBits == 0);
assert(info->AlphaBits == 0);
assert(info->LuminanceBits > 0);
assert(info->IntensityBits == 0);
}
else if (info->BaseFormat == GL_INTENSITY) {
assert(info->RedBits == 0);
assert(info->GreenBits == 0);
assert(info->BlueBits == 0);
assert(info->AlphaBits == 0);
assert(info->LuminanceBits == 0);
assert(info->IntensityBits > 0);
}
}
check_format_to_type_and_comps();
}
/**
* Return datatype and number of components per texel for the given gl_format.
* Only used for mipmap generation code.
*/
void
_mesa_format_to_type_and_comps(gl_format format,
GLenum *datatype, GLuint *comps)
{
switch (format) {
case MESA_FORMAT_RGBA8888:
case MESA_FORMAT_RGBA8888_REV:
case MESA_FORMAT_ARGB8888:
case MESA_FORMAT_ARGB8888_REV:
case MESA_FORMAT_RGBX8888:
case MESA_FORMAT_RGBX8888_REV:
case MESA_FORMAT_XRGB8888:
case MESA_FORMAT_XRGB8888_REV:
*datatype = GL_UNSIGNED_BYTE;
*comps = 4;
return;
case MESA_FORMAT_RGB888:
case MESA_FORMAT_BGR888:
*datatype = GL_UNSIGNED_BYTE;
*comps = 3;
return;
case MESA_FORMAT_RGB565:
case MESA_FORMAT_RGB565_REV:
*datatype = GL_UNSIGNED_SHORT_5_6_5;
*comps = 3;
return;
case MESA_FORMAT_ARGB4444:
case MESA_FORMAT_ARGB4444_REV:
*datatype = GL_UNSIGNED_SHORT_4_4_4_4;
*comps = 4;
return;
case MESA_FORMAT_ARGB1555:
case MESA_FORMAT_ARGB1555_REV:
*datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
*comps = 4;
return;
case MESA_FORMAT_RGBA5551:
*datatype = GL_UNSIGNED_SHORT_5_5_5_1;
*comps = 4;
return;
case MESA_FORMAT_AL44:
*datatype = MESA_UNSIGNED_BYTE_4_4;
*comps = 2;
return;
case MESA_FORMAT_AL88:
case MESA_FORMAT_AL88_REV:
*datatype = GL_UNSIGNED_BYTE;
*comps = 2;
return;
case MESA_FORMAT_AL1616:
case MESA_FORMAT_AL1616_REV:
*datatype = GL_UNSIGNED_SHORT;
*comps = 2;
return;
case MESA_FORMAT_A16:
case MESA_FORMAT_L16:
case MESA_FORMAT_I16:
*datatype = GL_UNSIGNED_SHORT;
*comps = 1;
return;
case MESA_FORMAT_RGB332:
*datatype = GL_UNSIGNED_BYTE_3_3_2;
*comps = 3;
return;
case MESA_FORMAT_A8:
case MESA_FORMAT_L8:
case MESA_FORMAT_I8:
case MESA_FORMAT_S8:
*datatype = GL_UNSIGNED_BYTE;
*comps = 1;
return;
case MESA_FORMAT_YCBCR:
case MESA_FORMAT_YCBCR_REV:
*datatype = GL_UNSIGNED_SHORT;
*comps = 2;
return;
case MESA_FORMAT_Z16:
*datatype = GL_UNSIGNED_SHORT;
*comps = 1;
return;
case MESA_FORMAT_X8_Z24:
*datatype = GL_UNSIGNED_INT;
*comps = 1;
return;
case MESA_FORMAT_Z24_X8:
*datatype = GL_UNSIGNED_INT;
*comps = 1;
return;
case MESA_FORMAT_Z32:
*datatype = GL_UNSIGNED_INT;
*comps = 1;
return;
case MESA_FORMAT_RGBA_16:
*datatype = GL_UNSIGNED_SHORT;
*comps = 4;
return;
case MESA_FORMAT_SIGNED_RGBA_16:
*datatype = GL_SHORT;
*comps = 4;
return;
case MESA_FORMAT_ALPHA_UINT8:
case MESA_FORMAT_LUMINANCE_UINT8:
case MESA_FORMAT_INTENSITY_UINT8:
*datatype = GL_UNSIGNED_BYTE;
*comps = 1;
return;
case MESA_FORMAT_LUMINANCE_ALPHA_UINT8:
*datatype = GL_UNSIGNED_BYTE;
*comps = 2;
return;
case MESA_FORMAT_ALPHA_UINT16:
case MESA_FORMAT_LUMINANCE_UINT16:
case MESA_FORMAT_INTENSITY_UINT16:
*datatype = GL_UNSIGNED_SHORT;
*comps = 1;
return;
case MESA_FORMAT_LUMINANCE_ALPHA_UINT16:
*datatype = GL_UNSIGNED_SHORT;
*comps = 2;
return;
case MESA_FORMAT_ALPHA_UINT32:
case MESA_FORMAT_LUMINANCE_UINT32:
case MESA_FORMAT_INTENSITY_UINT32:
*datatype = GL_UNSIGNED_INT;
*comps = 1;
return;
case MESA_FORMAT_LUMINANCE_ALPHA_UINT32:
*datatype = GL_UNSIGNED_INT;
*comps = 2;
return;
case MESA_FORMAT_ALPHA_INT8:
case MESA_FORMAT_LUMINANCE_INT8:
case MESA_FORMAT_INTENSITY_INT8:
*datatype = GL_BYTE;
*comps = 1;
return;
case MESA_FORMAT_LUMINANCE_ALPHA_INT8:
*datatype = GL_BYTE;
*comps = 2;
return;
case MESA_FORMAT_ALPHA_INT16:
case MESA_FORMAT_LUMINANCE_INT16:
case MESA_FORMAT_INTENSITY_INT16:
*datatype = GL_SHORT;
*comps = 1;
return;
case MESA_FORMAT_LUMINANCE_ALPHA_INT16:
*datatype = GL_SHORT;
*comps = 2;
return;
case MESA_FORMAT_ALPHA_INT32:
case MESA_FORMAT_LUMINANCE_INT32:
case MESA_FORMAT_INTENSITY_INT32:
*datatype = GL_INT;
*comps = 1;
return;
case MESA_FORMAT_LUMINANCE_ALPHA_INT32:
*datatype = GL_INT;
*comps = 2;
return;
case MESA_FORMAT_RGB_INT8:
*datatype = GL_BYTE;
*comps = 3;
return;
case MESA_FORMAT_RGBA_INT8:
*datatype = GL_BYTE;
*comps = 4;
return;
case MESA_FORMAT_RGB_INT16:
*datatype = GL_SHORT;
*comps = 3;
return;
case MESA_FORMAT_RGBA_INT16:
*datatype = GL_SHORT;
*comps = 4;
return;
case MESA_FORMAT_RGB_INT32:
*datatype = GL_INT;
*comps = 3;
return;
case MESA_FORMAT_RGBA_INT32:
*datatype = GL_INT;
*comps = 4;
return;
/**
* \name Non-normalized unsigned integer formats.
*/
case MESA_FORMAT_RGB_UINT8:
*datatype = GL_UNSIGNED_BYTE;
*comps = 3;
return;
case MESA_FORMAT_RGBA_UINT8:
*datatype = GL_UNSIGNED_BYTE;
*comps = 4;
return;
case MESA_FORMAT_RGB_UINT16:
*datatype = GL_UNSIGNED_SHORT;
*comps = 3;
return;
case MESA_FORMAT_RGBA_UINT16:
*datatype = GL_UNSIGNED_SHORT;
*comps = 4;
return;
case MESA_FORMAT_RGB_UINT32:
*datatype = GL_UNSIGNED_INT;
*comps = 3;
return;
case MESA_FORMAT_RGBA_UINT32:
*datatype = GL_UNSIGNED_INT;
*comps = 4;
return;
case MESA_FORMAT_COUNT:
assert(0);
return;
case MESA_FORMAT_NONE:
/* For debug builds, warn if any formats are not handled */
#ifdef DEBUG
default:
#endif
_mesa_problem(NULL, "bad format %s in _mesa_format_to_type_and_comps",
_mesa_get_format_name(format));
*datatype = 0;
*comps = 1;
}
}
/**
* Check if a gl_format exactly matches a GL formaat/type combination
* such that we can use memcpy() from one to the other.
*
* Note: this matching assumes that GL_PACK/UNPACK_SWAP_BYTES is unset.
*
* \return GL_TRUE if the formats match, GL_FALSE otherwise.
*/
GLboolean
_mesa_format_matches_format_and_type(gl_format gl_format,
GLenum format, GLenum type)
{
const GLboolean littleEndian = _mesa_little_endian();
/* Note: When reading a GL format/type combination, the format lists channel
* assignments from most significant channel in the type to least
* significant. A type with _REV indicates that the assignments are
* swapped, so they are listed from least significant to most significant.
*
* For sanity, please keep this switch statement ordered the same as the
* enums in formats.h.
*/
switch (gl_format) {
case MESA_FORMAT_NONE:
case MESA_FORMAT_COUNT:
return GL_FALSE;
case MESA_FORMAT_RGBA8888:
return ((format == GL_RGBA && (type == GL_UNSIGNED_INT_8_8_8_8 ||
(type == GL_UNSIGNED_BYTE && !littleEndian))) ||
(format == GL_ABGR_EXT && (type == GL_UNSIGNED_INT_8_8_8_8_REV ||
(type == GL_UNSIGNED_BYTE && littleEndian))));
case MESA_FORMAT_RGBA8888_REV:
return ((format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV));
case MESA_FORMAT_ARGB8888:
return ((format == GL_BGRA && (type == GL_UNSIGNED_INT_8_8_8_8_REV ||
(type == GL_UNSIGNED_BYTE && littleEndian))));
case MESA_FORMAT_ARGB8888_REV:
return ((format == GL_BGRA && (type == GL_UNSIGNED_INT_8_8_8_8 ||
(type == GL_UNSIGNED_BYTE && !littleEndian))));
case MESA_FORMAT_RGBX8888:
case MESA_FORMAT_RGBX8888_REV:
return GL_FALSE;
case MESA_FORMAT_XRGB8888:
case MESA_FORMAT_XRGB8888_REV:
return GL_FALSE;
case MESA_FORMAT_RGB888:
return format == GL_BGR && type == GL_UNSIGNED_BYTE && littleEndian;
case MESA_FORMAT_BGR888:
return format == GL_RGB && type == GL_UNSIGNED_BYTE && littleEndian;
case MESA_FORMAT_RGB565:
return format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5;
case MESA_FORMAT_RGB565_REV:
/* Some of the 16-bit MESA_FORMATs that would seem to correspond to
* GL_UNSIGNED_SHORT_* are byte-swapped instead of channel-reversed,
* according to formats.h, so they can't be matched.
*/
return GL_FALSE;
case MESA_FORMAT_ARGB4444:
return format == GL_BGRA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV;
case MESA_FORMAT_ARGB4444_REV:
return GL_FALSE;
case MESA_FORMAT_RGBA5551:
return format == GL_RGBA && type == GL_UNSIGNED_SHORT_5_5_5_1;
case MESA_FORMAT_ARGB1555:
return format == GL_BGRA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV;
case MESA_FORMAT_ARGB1555_REV:
return GL_FALSE;
case MESA_FORMAT_AL44:
return GL_FALSE;
case MESA_FORMAT_AL88:
return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_BYTE && littleEndian;
case MESA_FORMAT_AL88_REV:
return GL_FALSE;
case MESA_FORMAT_AL1616:
return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_SHORT && littleEndian;
case MESA_FORMAT_AL1616_REV:
return GL_FALSE;
case MESA_FORMAT_RGB332:
return format == GL_RGB && type == GL_UNSIGNED_BYTE_3_3_2;
case MESA_FORMAT_A8:
return format == GL_ALPHA && type == GL_UNSIGNED_BYTE;
case MESA_FORMAT_A16:
return format == GL_ALPHA && type == GL_UNSIGNED_SHORT && littleEndian;
case MESA_FORMAT_L8:
return format == GL_LUMINANCE && type == GL_UNSIGNED_BYTE;
case MESA_FORMAT_L16:
return format == GL_LUMINANCE && type == GL_UNSIGNED_SHORT && littleEndian;
case MESA_FORMAT_I8:
return format == GL_INTENSITY && type == GL_UNSIGNED_BYTE;
case MESA_FORMAT_I16:
return format == GL_INTENSITY && type == GL_UNSIGNED_SHORT && littleEndian;
case MESA_FORMAT_YCBCR:
case MESA_FORMAT_YCBCR_REV:
return GL_FALSE;
case MESA_FORMAT_Z24_X8:
return GL_FALSE;
case MESA_FORMAT_Z16:
return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_SHORT;
case MESA_FORMAT_X8_Z24:
return GL_FALSE;
case MESA_FORMAT_Z32:
return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_INT;
case MESA_FORMAT_S8:
return GL_FALSE;
/* FINISHME: What do we want to do for GL_EXT_texture_integer? */
case MESA_FORMAT_ALPHA_UINT8:
case MESA_FORMAT_ALPHA_UINT16:
case MESA_FORMAT_ALPHA_UINT32:
case MESA_FORMAT_ALPHA_INT8:
case MESA_FORMAT_ALPHA_INT16:
case MESA_FORMAT_ALPHA_INT32:
return GL_FALSE;
case MESA_FORMAT_INTENSITY_UINT8:
case MESA_FORMAT_INTENSITY_UINT16:
case MESA_FORMAT_INTENSITY_UINT32:
case MESA_FORMAT_INTENSITY_INT8:
case MESA_FORMAT_INTENSITY_INT16:
case MESA_FORMAT_INTENSITY_INT32:
return GL_FALSE;
case MESA_FORMAT_LUMINANCE_UINT8:
case MESA_FORMAT_LUMINANCE_UINT16:
case MESA_FORMAT_LUMINANCE_UINT32:
case MESA_FORMAT_LUMINANCE_INT8:
case MESA_FORMAT_LUMINANCE_INT16:
case MESA_FORMAT_LUMINANCE_INT32:
return GL_FALSE;
case MESA_FORMAT_LUMINANCE_ALPHA_UINT8:
case MESA_FORMAT_LUMINANCE_ALPHA_UINT16:
case MESA_FORMAT_LUMINANCE_ALPHA_UINT32:
case MESA_FORMAT_LUMINANCE_ALPHA_INT8:
case MESA_FORMAT_LUMINANCE_ALPHA_INT16:
case MESA_FORMAT_LUMINANCE_ALPHA_INT32:
return GL_FALSE;
case MESA_FORMAT_RGB_INT8:
case MESA_FORMAT_RGBA_INT8:
case MESA_FORMAT_RGB_INT16:
case MESA_FORMAT_RGBA_INT16:
case MESA_FORMAT_RGB_INT32:
case MESA_FORMAT_RGBA_INT32:
return GL_FALSE;
case MESA_FORMAT_RGB_UINT8:
case MESA_FORMAT_RGBA_UINT8:
case MESA_FORMAT_RGB_UINT16:
case MESA_FORMAT_RGBA_UINT16:
case MESA_FORMAT_RGB_UINT32:
case MESA_FORMAT_RGBA_UINT32:
return GL_FALSE;
case MESA_FORMAT_SIGNED_RGBA_16:
case MESA_FORMAT_RGBA_16:
/* FINISHME: SNORM */
return GL_FALSE;
}
return GL_FALSE;
}
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