glformats.c 54.5 KB
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/*
 * 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
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 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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 * 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.
 */


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#include "context.h"
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#include "glformats.h"


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/**
 * \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:
      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:
      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_DUDV_ATI:
   case GL_DU8DV8_ATI:
   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:
      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:
   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_ABGR_EXT ||
          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:
   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_ABGR_EXT ||
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          format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
          format == GL_RGB)
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         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_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;
   }
}


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/**
 * 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;
   default:
      return -1;
   }
}


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/**
 * Test if the given format is an integer (non-normalized) format.
 */
GLboolean
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_mesa_is_enum_format_unsigned_int(GLenum format)
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{
   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:
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   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 */
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   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;
   }
}


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/**
 * 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);
}


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/**
 * Test if the given type is an integer (non-normalized) format.
 */
GLboolean
_mesa_is_type_integer(GLenum type)
{
   switch (type) {
   case GL_INT:
   case GL_UNSIGNED_INT:
   case GL_SHORT:
   case GL_UNSIGNED_SHORT:
   case GL_BYTE:
   case GL_UNSIGNED_BYTE:
      return GL_TRUE;
   default:
      return GL_FALSE;
   }
}


/**
 * Test if the given format or type is an integer (non-normalized) format.
 */
extern GLboolean
_mesa_is_enum_format_or_type_integer(GLenum format, GLenum type)
{
   return _mesa_is_enum_format_integer(format) || _mesa_is_type_integer(type);
}


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;
   }
}


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/**
 * 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:
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      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:
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      /* 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 the given image format is a dudv format.
 */
GLboolean
_mesa_is_dudv_format(GLenum format)
{
   switch (format) {
      case GL_DUDV_ATI:
      case GL_DU8DV8_ATI:
         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(struct gl_context *ctx, GLenum format)
{
   switch (format) {
   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:
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      /* Assume that the ANGLE flag will always be set if the EXT flag is set.
       */
      return ctx->Extensions.ANGLE_texture_compression_dxt;
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   case GL_RGB_S3TC:
   case GL_RGB4_S3TC:
   case GL_RGBA_S3TC:
   case GL_RGBA4_S3TC:
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      return _mesa_is_desktop_gl(ctx) &&
         ctx->Extensions.ANGLE_texture_compression_dxt;
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   case GL_COMPRESSED_SRGB_S3TC_DXT1_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:
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      return _mesa_is_desktop_gl(ctx)
         && ctx->Extensions.EXT_texture_sRGB
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         && ctx->Extensions.EXT_texture_compression_s3tc;
   case GL_COMPRESSED_RGB_FXT1_3DFX:
   case GL_COMPRESSED_RGBA_FXT1_3DFX:
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      return _mesa_is_desktop_gl(ctx)
         && ctx->Extensions.TDFX_texture_compression_FXT1;
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   case GL_COMPRESSED_RED_RGTC1:
   case GL_COMPRESSED_SIGNED_RED_RGTC1:
   case GL_COMPRESSED_RG_RGTC2:
   case GL_COMPRESSED_SIGNED_RG_RGTC2:
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      return _mesa_is_desktop_gl(ctx)
         && ctx->Extensions.ARB_texture_compression_rgtc;
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   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:
902
      return ctx->API == API_OPENGL_COMPAT
903
         && ctx->Extensions.EXT_texture_compression_latc;
904
   case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
905
      return ctx->API == API_OPENGL_COMPAT
906
         && ctx->Extensions.ATI_texture_compression_3dc;
907
   case GL_ETC1_RGB8_OES:
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      return _mesa_is_gles(ctx)
         && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
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   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:
920
      return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
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   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;
   default:
      return GL_FALSE;
   }
}


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/**
 * Convert various base formats to the cooresponding 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;
}

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/**
 * 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",
		    __FUNCTION__, pname);
      return GL_FALSE;
   }

   return GL_FALSE;
}
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/**
 * 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;
   }
}


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/**
 * 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;
   }
}


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/**
 * 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_SLUMINANCE:
      return GL_LUMINANCE8;

   case GL_SLUMINANCE_ALPHA:
      return GL_LUMINANCE8_ALPHA8;

   default:
      return format;
   }
}


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/**
 * 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)
{
   /* 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_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:
      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 */
      }
1291 1292 1293 1294
      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 */
      }
1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407
      return GL_INVALID_OPERATION;

   case GL_UNSIGNED_INT_24_8:
      if (!ctx->Extensions.EXT_packed_depth_stencil) {
         return GL_INVALID_ENUM;
      }
      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;

   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:
               return GL_NO_ERROR;
            case GL_HALF_FLOAT:
               return ctx->Extensions.ARB_half_float_pixel
                  ? GL_NO_ERROR : GL_INVALID_ENUM;
            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:
               return GL_NO_ERROR;
            case GL_HALF_FLOAT:
               return ctx->Extensions.ARB_half_float_pixel
                  ? GL_NO_ERROR : GL_INVALID_ENUM;
            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:
               return GL_NO_ERROR;
            case GL_HALF_FLOAT:
               return ctx->Extensions.ARB_half_float_pixel
                  ? GL_NO_ERROR : GL_INVALID_ENUM;
            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:
               return GL_NO_ERROR;
1408 1409 1410 1411
            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;
1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487
            case GL_HALF_FLOAT:
               return ctx->Extensions.ARB_half_float_pixel
                  ? 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:
               return GL_NO_ERROR;
            case GL_HALF_FLOAT:
               return ctx->Extensions.ARB_half_float_pixel
                  ? GL_NO_ERROR : GL_INVALID_ENUM;
            default:
               return GL_INVALID_ENUM;
         }

      case GL_RGBA:
      case GL_BGRA:
      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_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 GL_NO_ERROR;
            case GL_HALF_FLOAT:
               return ctx->Extensions.ARB_half_float_pixel
                  ? GL_NO_ERROR : GL_INVALID_ENUM;
            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_EXT:
         if (ctx->Extensions.EXT_packed_depth_stencil &&
             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;
1488
         else
1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520
            return GL_INVALID_ENUM;

      case GL_DUDV_ATI:
      case GL_DU8DV8_ATI:
         if (!ctx->Extensions.ATI_envmap_bumpmap)
            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:
               return GL_NO_ERROR;
            default:
               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:
1521
               return (ctx->Version >= 30 ||
1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535
                       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:
1536
               return (ctx->Version >= 30 ||
1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557
                       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 */
1558
               return (ctx->Version >= 30 ||
1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573
                       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:
1574
               return (ctx->Version >= 30 ||
1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610
                       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;
}
1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679


/**
 * 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;
}
1680 1681 1682 1683 1684 1685 1686 1687 1688


/**
 * 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(GLenum format, GLenum type,
1689
                                      GLenum internalFormat)
1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060
{
   GLboolean type_valid = GL_TRUE;

   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;
         default:
            return GL_INVALID_OPERATION;
         }
         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;
         default:
            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:
         if (internalFormat != GL_RG16F)
            return GL_INVALID_OPERATION;
         break;

      case GL_FLOAT:
         switch (internalFormat) {
         case GL_RG16F:
         case GL_RG32F:
            break;
         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:
         if (internalFormat != GL_R16F)
            return GL_INVALID_OPERATION;
         break;

      case GL_FLOAT:
         switch (internalFormat) {
         case GL_R16F:
         case GL_R32F:
            break;
         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:
2061 2062
         if (internalFormat != GL_DEPTH_COMPONENT
             && internalFormat != GL_DEPTH_COMPONENT16)
2063 2064 2065 2066 2067
            return GL_INVALID_OPERATION;
         break;

      case GL_UNSIGNED_INT:
         switch (internalFormat) {
2068
         case GL_DEPTH_COMPONENT:
2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089
         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:
2090 2091
         if (internalFormat != GL_DEPTH_STENCIL
             && internalFormat