src/mesa/main/glformats.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (c) 2008-2009  VMware, Inc.
   6  * Copyright (c) 2012 Intel Corporation
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 #include "imports.h"
  28 #include "glformats.h"
  29
  30
  31 /**
  32  * Test if the given format is an integer (non-normalized) format.
  33  */
  34 GLboolean
  35 _mesa_is_enum_format_integer(GLenum format)
  36 {
  37    switch (format) {
  38    /* generic integer formats */
  39    case GL_RED_INTEGER_EXT:
  40    case GL_GREEN_INTEGER_EXT:
  41    case GL_BLUE_INTEGER_EXT:
  42    case GL_ALPHA_INTEGER_EXT:
  43    case GL_RGB_INTEGER_EXT:
  44    case GL_RGBA_INTEGER_EXT:
  45    case GL_BGR_INTEGER_EXT:
  46    case GL_BGRA_INTEGER_EXT:
  47    case GL_LUMINANCE_INTEGER_EXT:
  48    case GL_LUMINANCE_ALPHA_INTEGER_EXT:
  49    case GL_RG_INTEGER:
  50    /* specific integer formats */
  51    case GL_RGBA32UI_EXT:
  52    case GL_RGB32UI_EXT:
  53    case GL_RG32UI:
  54    case GL_R32UI:
  55    case GL_ALPHA32UI_EXT:
  56    case GL_INTENSITY32UI_EXT:
  57    case GL_LUMINANCE32UI_EXT:
  58    case GL_LUMINANCE_ALPHA32UI_EXT:
  59    case GL_RGBA16UI_EXT:
  60    case GL_RGB16UI_EXT:
  61    case GL_RG16UI:
  62    case GL_R16UI:
  63    case GL_ALPHA16UI_EXT:
  64    case GL_INTENSITY16UI_EXT:
  65    case GL_LUMINANCE16UI_EXT:
  66    case GL_LUMINANCE_ALPHA16UI_EXT:
  67    case GL_RGBA8UI_EXT:
  68    case GL_RGB8UI_EXT:
  69    case GL_RG8UI:
  70    case GL_R8UI:
  71    case GL_ALPHA8UI_EXT:
  72    case GL_INTENSITY8UI_EXT:
  73    case GL_LUMINANCE8UI_EXT:
  74    case GL_LUMINANCE_ALPHA8UI_EXT:
  75    case GL_RGBA32I_EXT:
  76    case GL_RGB32I_EXT:
  77    case GL_RG32I:
  78    case GL_R32I:
  79    case GL_ALPHA32I_EXT:
  80    case GL_INTENSITY32I_EXT:
  81    case GL_LUMINANCE32I_EXT:
  82    case GL_LUMINANCE_ALPHA32I_EXT:
  83    case GL_RGBA16I_EXT:
  84    case GL_RGB16I_EXT:
  85    case GL_RG16I:
  86    case GL_R16I:
  87    case GL_ALPHA16I_EXT:
  88    case GL_INTENSITY16I_EXT:
  89    case GL_LUMINANCE16I_EXT:
  90    case GL_LUMINANCE_ALPHA16I_EXT:
  91    case GL_RGBA8I_EXT:
  92    case GL_RGB8I_EXT:
  93    case GL_RG8I:
  94    case GL_R8I:
  95    case GL_ALPHA8I_EXT:
  96    case GL_INTENSITY8I_EXT:
  97    case GL_LUMINANCE8I_EXT:
  98    case GL_LUMINANCE_ALPHA8I_EXT:
  99    case GL_RGB10_A2UI:
 100       return GL_TRUE;
 101    default:
 102       return GL_FALSE;
 103    }
 104 }
 105
 106
 107 /**
 108  * Test if the given type is an integer (non-normalized) format.
 109  */
 110 GLboolean
 111 _mesa_is_type_integer(GLenum type)
 112 {
 113    switch (type) {
 114    case GL_INT:
 115    case GL_UNSIGNED_INT:
 116    case GL_SHORT:
 117    case GL_UNSIGNED_SHORT:
 118    case GL_BYTE:
 119    case GL_UNSIGNED_BYTE:
 120       return GL_TRUE;
 121    default:
 122       return GL_FALSE;
 123    }
 124 }
 125
 126
 127 /**
 128  * Test if the given format or type is an integer (non-normalized) format.
 129  */
 130 extern GLboolean
 131 _mesa_is_enum_format_or_type_integer(GLenum format, GLenum type)
 132 {
 133    return _mesa_is_enum_format_integer(format) || _mesa_is_type_integer(type);
 134 }
 135
 136
 137 GLboolean
 138 _mesa_is_type_unsigned(GLenum type)
 139 {
 140    switch (type) {
 141    case GL_UNSIGNED_INT:
 142    case GL_UNSIGNED_INT_8_8_8_8:
 143    case GL_UNSIGNED_INT_8_8_8_8_REV:
 144    case GL_UNSIGNED_INT_10_10_10_2:
 145    case GL_UNSIGNED_INT_2_10_10_10_REV:
 146
 147    case GL_UNSIGNED_SHORT:
 148    case GL_UNSIGNED_SHORT_4_4_4_4:
 149    case GL_UNSIGNED_SHORT_5_5_5_1:
 150    case GL_UNSIGNED_SHORT_5_6_5:
 151    case GL_UNSIGNED_SHORT_5_6_5_REV:
 152    case GL_UNSIGNED_SHORT_4_4_4_4_REV:
 153    case GL_UNSIGNED_SHORT_1_5_5_5_REV:
 154    case GL_UNSIGNED_SHORT_8_8_MESA:
 155    case GL_UNSIGNED_SHORT_8_8_REV_MESA:
 156
 157    case GL_UNSIGNED_BYTE:
 158    case GL_UNSIGNED_BYTE_3_3_2:
 159    case GL_UNSIGNED_BYTE_2_3_3_REV:
 160       return GL_TRUE;
 161
 162    default:
 163       return GL_FALSE;
 164    }
 165 }
 166
 167
 168 /**
 169  * Convert various base formats to the cooresponding integer format.
 170  */
 171 GLenum
 172 _mesa_base_format_to_integer_format(GLenum format)
 173 {
 174    switch(format) {
 175    case GL_RED:
 176       return GL_RED_INTEGER;
 177    case GL_GREEN:
 178       return GL_GREEN_INTEGER;
 179    case GL_BLUE:
 180       return GL_BLUE_INTEGER;
 181    case GL_RG:
 182       return GL_RG_INTEGER;
 183    case GL_RGB:
 184       return GL_RGB_INTEGER;
 185    case GL_RGBA:
 186       return GL_RGBA_INTEGER;
 187    case GL_BGR:
 188       return GL_BGR_INTEGER;
 189    case GL_BGRA:
 190       return GL_BGRA_INTEGER;
 191    case GL_ALPHA:
 192       return GL_ALPHA_INTEGER;
 193    case GL_LUMINANCE:
 194       return GL_LUMINANCE_INTEGER_EXT;
 195    case GL_LUMINANCE_ALPHA:
 196       return GL_LUMINANCE_ALPHA_INTEGER_EXT;
 197    }
 198
 199    return format;
 200 }
 201