glformats.c 103 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 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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 */


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#include "context.h"
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#include "glformats.h"
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#include "formats.h"
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#include "texcompress.h"
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#include "enums.h"
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enum {
   ZERO = 4,
   ONE = 5
};

enum {
   IDX_LUMINANCE = 0,
   IDX_ALPHA,
   IDX_INTENSITY,
   IDX_LUMINANCE_ALPHA,
   IDX_RGB,
   IDX_RGBA,
   IDX_RED,
   IDX_GREEN,
   IDX_BLUE,
   IDX_BGR,
   IDX_BGRA,
   IDX_ABGR,
   IDX_RG,
   MAX_IDX
};

#define MAP1(x)       MAP4(x, ZERO, ZERO, ZERO)
#define MAP2(x,y)     MAP4(x, y, ZERO, ZERO)
#define MAP3(x,y,z)   MAP4(x, y, z, ZERO)
#define MAP4(x,y,z,w) { x, y, z, w, ZERO, ONE }

static const struct {
   GLubyte format_idx;
   GLubyte to_rgba[6];
   GLubyte from_rgba[6];
} mappings[MAX_IDX] =
{
   {
      IDX_LUMINANCE,
      MAP4(0,0,0,ONE),
      MAP1(0)
   },

   {
      IDX_ALPHA,
      MAP4(ZERO, ZERO, ZERO, 0),
      MAP1(3)
   },

   {
      IDX_INTENSITY,
      MAP4(0, 0, 0, 0),
      MAP1(0),
   },

   {
      IDX_LUMINANCE_ALPHA,
      MAP4(0,0,0,1),
      MAP2(0,3)
   },

   {
      IDX_RGB,
      MAP4(0,1,2,ONE),
      MAP3(0,1,2)
   },

   {
      IDX_RGBA,
      MAP4(0,1,2,3),
      MAP4(0,1,2,3),
   },

   {
      IDX_RED,
      MAP4(0, ZERO, ZERO, ONE),
      MAP1(0),
   },

   {
      IDX_GREEN,
      MAP4(ZERO, 0, ZERO, ONE),
      MAP1(1),
   },

   {
      IDX_BLUE,
      MAP4(ZERO, ZERO, 0, ONE),
      MAP1(2),
   },

   {
      IDX_BGR,
      MAP4(2,1,0,ONE),
      MAP3(2,1,0)
   },

   {
      IDX_BGRA,
      MAP4(2,1,0,3),
      MAP4(2,1,0,3)
   },

   {
      IDX_ABGR,
      MAP4(3,2,1,0),
      MAP4(3,2,1,0)
   },

   {
      IDX_RG,
      MAP4(0, 1, ZERO, ONE),
      MAP2(0, 1)
   },
};

/**
 * Convert a GL image format enum to an IDX_* value (see above).
 */
static int
get_map_idx(GLenum value)
{
   switch (value) {
   case GL_LUMINANCE:
   case GL_LUMINANCE_INTEGER_EXT:
      return IDX_LUMINANCE;
   case GL_ALPHA:
   case GL_ALPHA_INTEGER:
      return IDX_ALPHA;
   case GL_INTENSITY:
      return IDX_INTENSITY;
   case GL_LUMINANCE_ALPHA:
   case GL_LUMINANCE_ALPHA_INTEGER_EXT:
      return IDX_LUMINANCE_ALPHA;
   case GL_RGB:
   case GL_RGB_INTEGER:
      return IDX_RGB;
   case GL_RGBA:
   case GL_RGBA_INTEGER:
      return IDX_RGBA;
   case GL_RED:
   case GL_RED_INTEGER:
      return IDX_RED;
   case GL_GREEN:
      return IDX_GREEN;
   case GL_BLUE:
      return IDX_BLUE;
   case GL_BGR:
   case GL_BGR_INTEGER:
      return IDX_BGR;
   case GL_BGRA:
   case GL_BGRA_INTEGER:
      return IDX_BGRA;
   case GL_ABGR_EXT:
      return IDX_ABGR;
   case GL_RG:
   case GL_RG_INTEGER:
      return IDX_RG;
   default:
      _mesa_problem(NULL, "Unexpected inFormat %s",
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                    _mesa_enum_to_string(value));
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      return 0;
   }
}

/**
 * When promoting texture formats (see below) we need to compute the
 * mapping of dest components back to source components.
 * This function does that.
 * \param inFormat  the incoming format of the texture
 * \param outFormat  the final texture format
 * \return map[6]  a full 6-component map
 */
void
_mesa_compute_component_mapping(GLenum inFormat, GLenum outFormat, GLubyte *map)
{
   const int inFmt = get_map_idx(inFormat);
   const int outFmt = get_map_idx(outFormat);
   const GLubyte *in2rgba = mappings[inFmt].to_rgba;
   const GLubyte *rgba2out = mappings[outFmt].from_rgba;
   int i;

   for (i = 0; i < 4; i++)
      map[i] = in2rgba[rgba2out[i]];

   map[ZERO] = ZERO;
   map[ONE] = ONE;

#if 0
   printf("from %x/%s to %x/%s map %d %d %d %d %d %d\n",
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	  inFormat, _mesa_enum_to_string(inFormat),
	  outFormat, _mesa_enum_to_string(outFormat),
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	  map[0],
	  map[1],
	  map[2],
	  map[3],
	  map[4],
	  map[5]);
#endif
}
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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:
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   case GL_HALF_FLOAT_OES:
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      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:
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   case GL_HALF_FLOAT_OES:
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      return sizeof(GLhalfARB);
   case GL_FLOAT:
      return sizeof(GLfloat);
   case GL_UNSIGNED_BYTE_3_3_2:
   case GL_UNSIGNED_BYTE_2_3_3_REV:
   case MESA_UNSIGNED_BYTE_4_4:
      return sizeof(GLubyte);
   case GL_UNSIGNED_SHORT_5_6_5:
   case GL_UNSIGNED_SHORT_5_6_5_REV:
   case GL_UNSIGNED_SHORT_4_4_4_4:
   case GL_UNSIGNED_SHORT_4_4_4_4_REV:
   case GL_UNSIGNED_SHORT_5_5_5_1:
   case GL_UNSIGNED_SHORT_1_5_5_5_REV:
   case GL_UNSIGNED_SHORT_8_8_MESA:
   case GL_UNSIGNED_SHORT_8_8_REV_MESA:
      return sizeof(GLushort);
   case GL_UNSIGNED_INT_8_8_8_8:
   case GL_UNSIGNED_INT_8_8_8_8_REV:
   case GL_UNSIGNED_INT_10_10_10_2:
   case GL_UNSIGNED_INT_2_10_10_10_REV:
   case GL_UNSIGNED_INT_24_8_EXT:
   case GL_UNSIGNED_INT_5_9_9_9_REV:
   case GL_UNSIGNED_INT_10F_11F_11F_REV:
      return sizeof(GLuint);
   case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
      return 8;
   default:
      return -1;
   }
}


/**
 * Get the number of components in a pixel format.
 *
 * \param format pixel format.
 *
 * \return the number of components in the given format, or -1 if a bad format.
 */
GLint
_mesa_components_in_format(GLenum format)
{
   switch (format) {
   case GL_COLOR_INDEX:
   case GL_STENCIL_INDEX:
   case GL_DEPTH_COMPONENT:
   case GL_RED:
   case GL_RED_INTEGER_EXT:
   case GL_GREEN:
   case GL_GREEN_INTEGER_EXT:
   case GL_BLUE:
   case GL_BLUE_INTEGER_EXT:
   case GL_ALPHA:
   case GL_ALPHA_INTEGER_EXT:
   case GL_LUMINANCE:
   case GL_LUMINANCE_INTEGER_EXT:
   case GL_INTENSITY:
      return 1;

   case GL_LUMINANCE_ALPHA:
   case GL_LUMINANCE_ALPHA_INTEGER_EXT:
   case GL_RG:
   case GL_YCBCR_MESA:
   case GL_DEPTH_STENCIL_EXT:
   case GL_RG_INTEGER:
      return 2;

   case GL_RGB:
   case GL_BGR:
   case GL_RGB_INTEGER_EXT:
   case GL_BGR_INTEGER_EXT:
      return 3;

   case GL_RGBA:
   case GL_BGRA:
   case GL_ABGR_EXT:
   case GL_RGBA_INTEGER_EXT:
   case GL_BGRA_INTEGER_EXT:
      return 4;

   default:
      return -1;
   }
}


/**
 * Get the bytes per pixel of pixel format type pair.
 *
 * \param format pixel format.
 * \param type pixel type.
 *
 * \return bytes per pixel, or -1 if a bad format or type was given.
 */
GLint
_mesa_bytes_per_pixel(GLenum format, GLenum type)
{
   GLint comps = _mesa_components_in_format(format);
   if (comps < 0)
      return -1;

   switch (type) {
   case GL_BITMAP:
      return 0;  /* special case */
   case GL_BYTE:
   case GL_UNSIGNED_BYTE:
      return comps * sizeof(GLubyte);
   case GL_SHORT:
   case GL_UNSIGNED_SHORT:
      return comps * sizeof(GLshort);
   case GL_INT:
   case GL_UNSIGNED_INT:
      return comps * sizeof(GLint);
   case GL_FLOAT:
      return comps * sizeof(GLfloat);
   case GL_HALF_FLOAT_ARB:
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   case GL_HALF_FLOAT_OES:
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      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:
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      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;
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   case GL_UNSIGNED_SHORT_5_5_5_1:
   case GL_UNSIGNED_SHORT_1_5_5_5_REV:
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      if (format == GL_RGBA || format == GL_BGRA ||
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          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:
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      if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
          format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT ||
          format == GL_RGB)
         return sizeof(GLuint);
      else
         return -1;
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   case GL_UNSIGNED_INT_10_10_10_2:
   case GL_UNSIGNED_INT_2_10_10_10_REV:
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      if (format == GL_RGBA || format == GL_BGRA ||
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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:
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      if (format == GL_DEPTH_COMPONENT ||
          format == GL_DEPTH_STENCIL_EXT)
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         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:
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   case GL_HALF_FLOAT_OES:
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      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;
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   case GL_UNSIGNED_INT_10F_11F_11F_REV:
      if (comps == 3)
         return sizeof(GLuint);
      else
         return -1;
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   case GL_UNSIGNED_INT64_ARB:
      return comps * 8;
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   default:
      return -1;
   }
}

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/**
 * Test if the given format is unsized.
 */
GLboolean
_mesa_is_enum_format_unsized(GLenum format)
{
   switch (format) {
   case GL_RGBA:
   case GL_BGRA:
   case GL_ABGR_EXT:
   case GL_RGB:
   case GL_BGR:
   case GL_RG:
   case GL_RED:
   case GL_GREEN:
   case GL_BLUE:
   case GL_ALPHA:
   case GL_INTENSITY:
   case GL_LUMINANCE:
   case GL_LUMINANCE_ALPHA:

   case GL_SRGB:
   case GL_SRGB_ALPHA:
   case GL_SLUMINANCE:
   case GL_SLUMINANCE_ALPHA:

   case GL_RGBA_SNORM:
   case GL_RGB_SNORM:
   case GL_RG_SNORM:
   case GL_RED_SNORM:
   case GL_ALPHA_SNORM:
   case GL_INTENSITY_SNORM:
   case GL_LUMINANCE_SNORM:
   case GL_LUMINANCE_ALPHA_SNORM:

   case GL_RED_INTEGER:
   case GL_GREEN_INTEGER:
   case GL_BLUE_INTEGER:
   case GL_ALPHA_INTEGER:
   case GL_RGB_INTEGER:
   case GL_RGBA_INTEGER:
   case GL_BGR_INTEGER:
   case GL_BGRA_INTEGER:
   case GL_RG_INTEGER:
   case GL_LUMINANCE_INTEGER_EXT:
   case GL_LUMINANCE_ALPHA_INTEGER_EXT:

   case GL_DEPTH_COMPONENT:
   case GL_DEPTH_STENCIL:
   case GL_STENCIL_INDEX:
      return GL_TRUE;
   default:
      return GL_FALSE;
   }
}

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/**
 * Test if the given format is a UNORM (unsigned-normalized) format.
 */
GLboolean
_mesa_is_enum_format_unorm(GLenum format)
{
      switch(format) {
      case GL_RED:
      case GL_GREEN:
      case GL_BLUE:
      case GL_ALPHA:
      case GL_ALPHA4:
      case GL_ALPHA8:
      case GL_ALPHA12:
      case GL_ALPHA16:
      case 1:
      case GL_LUMINANCE:
      case GL_SLUMINANCE:
      case GL_LUMINANCE4:
      case GL_LUMINANCE8:
      case GL_LUMINANCE12:
      case GL_LUMINANCE16:
      case 2:
      case GL_LUMINANCE_ALPHA:
      case GL_SLUMINANCE_ALPHA:
      case GL_LUMINANCE4_ALPHA4:
      case GL_LUMINANCE6_ALPHA2:
      case GL_LUMINANCE8_ALPHA8:
      case GL_LUMINANCE12_ALPHA4:
      case GL_LUMINANCE12_ALPHA12:
      case GL_LUMINANCE16_ALPHA16:
      case GL_INTENSITY:
      case GL_INTENSITY4:
      case GL_INTENSITY8:
      case GL_INTENSITY12:
      case GL_INTENSITY16:
      case GL_R8:
      case GL_R16:
      case GL_RG:
      case GL_RG8:
      case GL_RG16:
      case 3:
      case GL_RGB:
      case GL_BGR:
      case GL_SRGB:
      case GL_R3_G3_B2:
      case GL_RGB4:
      case GL_RGB5:
      case GL_RGB565:
      case GL_RGB8:
      case GL_RGB10:
      case GL_RGB12:
      case GL_RGB16:
      case 4:
      case GL_ABGR_EXT:
      case GL_RGBA:
      case GL_BGRA:
      case GL_SRGB_ALPHA:
      case GL_RGBA2:
      case GL_RGBA4:
      case GL_RGB5_A1:
      case GL_RGBA8:
      case GL_RGB10_A2:
      case GL_RGBA12:
      case GL_RGBA16:
         return GL_TRUE;
      default:
         return GL_FALSE;
   }
}

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/**
 * Test if the given format is a SNORM (signed-normalized) format.
 */
GLboolean
_mesa_is_enum_format_snorm(GLenum format)
{
   switch (format) {
   /* signed, normalized texture formats */
   case GL_RED_SNORM:
   case GL_R8_SNORM:
   case GL_R16_SNORM:
   case GL_RG_SNORM:
   case GL_RG8_SNORM:
   case GL_RG16_SNORM:
   case GL_RGB_SNORM:
   case GL_RGB8_SNORM:
   case GL_RGB16_SNORM:
   case GL_RGBA_SNORM:
   case GL_RGBA8_SNORM:
   case GL_RGBA16_SNORM:
   case GL_ALPHA_SNORM:
   case GL_ALPHA8_SNORM:
   case GL_ALPHA16_SNORM:
   case GL_LUMINANCE_SNORM:
   case GL_LUMINANCE8_SNORM:
   case GL_LUMINANCE16_SNORM:
   case GL_LUMINANCE_ALPHA_SNORM:
   case GL_LUMINANCE8_ALPHA8_SNORM:
   case GL_LUMINANCE16_ALPHA16_SNORM:
   case GL_INTENSITY_SNORM:
   case GL_INTENSITY8_SNORM:
   case GL_INTENSITY16_SNORM:
      return GL_TRUE;
   default:
      return GL_FALSE;
   }
}
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/**
 * Test if the given format is an integer (non-normalized) format.
 */
GLboolean
742
_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;
   }
}

828
/**
829
 * Test if the given format is an ASTC 2D format.
830
 */
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static bool
is_astc_2d_format(GLenum internalFormat)
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{
   switch (internalFormat) {
   case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
   case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
   case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
   case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
   case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
   case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
   case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
   case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
   case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
   case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
   case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
   case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
   case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
   case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
      return true;
   default:
      return false;
   }
}

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/**
 * Test if the given format is an ASTC 3D format.
 */
static bool
is_astc_3d_format(GLenum internalFormat)
{
   switch (internalFormat) {
   case GL_COMPRESSED_RGBA_ASTC_3x3x3_OES:
   case GL_COMPRESSED_RGBA_ASTC_4x3x3_OES:
   case GL_COMPRESSED_RGBA_ASTC_4x4x3_OES:
   case GL_COMPRESSED_RGBA_ASTC_4x4x4_OES:
   case GL_COMPRESSED_RGBA_ASTC_5x4x4_OES:
   case GL_COMPRESSED_RGBA_ASTC_5x5x4_OES:
   case GL_COMPRESSED_RGBA_ASTC_5x5x5_OES:
   case GL_COMPRESSED_RGBA_ASTC_6x5x5_OES:
   case GL_COMPRESSED_RGBA_ASTC_6x6x5_OES:
   case GL_COMPRESSED_RGBA_ASTC_6x6x6_OES:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_3x3x3_OES:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x3x3_OES:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x3_OES:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4x4_OES:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4x4_OES:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x4_OES:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5x5_OES:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5x5_OES:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x5_OES:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6x6_OES:
      return true;
   default:
      return false;
   }
}
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/**
 * Test if the given format is an ASTC format.
 */
GLboolean
_mesa_is_astc_format(GLenum internalFormat)
{
   return is_astc_2d_format(internalFormat) ||
          is_astc_3d_format(internalFormat);
}

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/**
 * Test if the given format is an ETC2 format.
 */
GLboolean
_mesa_is_etc2_format(GLenum internalFormat)
{
   switch (internalFormat) {
   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:
      return true;
   default:
      return 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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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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      case GL_COMPRESSED_RGBA_BPTC_UNORM:
      case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
      case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
      case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
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      case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
      case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
      case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
      case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
      case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
      case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
      case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
      case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
      case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
      case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
      case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
      case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
      case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
      case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
      case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
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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 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
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_mesa_is_compressed_format(const struct gl_context *ctx, GLenum format)
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{
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   mesa_format m_format = _mesa_glenum_to_compressed_format(format);

   /* Some formats in this switch have an equivalent mesa_format_layout
    * to the compressed formats in the layout switch below and thus
    * must be handled first.
    */
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   switch (format) {
   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_LUMINANCE_ALPHA_3DC_ATI:
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      return ctx->API == API_OPENGL_COMPAT
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         && ctx->Extensions.ATI_texture_compression_3dc;
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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;
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   }

   switch (_mesa_get_format_layout(m_format)) {
   case MESA_FORMAT_LAYOUT_S3TC:
      if (_mesa_get_format_color_encoding(m_format) == GL_LINEAR) {
         /* Assume that the ANGLE flag will always be set if the
          * EXT flag is set.
          */
         return ctx->Extensions.ANGLE_texture_compression_dxt;
      } else {
         return _mesa_is_desktop_gl(ctx)
            && ctx->Extensions.EXT_texture_sRGB
            && ctx->Extensions.EXT_texture_compression_s3tc;
      }
   case MESA_FORMAT_LAYOUT_FXT1:
      return _mesa_is_desktop_gl(ctx)
         && ctx->Extensions.TDFX_texture_compression_FXT1;
   case MESA_FORMAT_LAYOUT_RGTC:
      return _mesa_is_desktop_gl(ctx)
         && ctx->Extensions.ARB_texture_compression_rgtc;
   case MESA_FORMAT_LAYOUT_LATC:
      return ctx->API == API_OPENGL_COMPAT
         && ctx->Extensions.EXT_texture_compression_latc;
   case MESA_FORMAT_LAYOUT_ETC1:
      return _mesa_is_gles(ctx)
         && ctx->Extensions.OES_compressed_ETC1_RGB8_texture;
   case MESA_FORMAT_LAYOUT_ETC2:
      return _mesa_is_gles3(ctx) || ctx->Extensions.ARB_ES3_compatibility;
   case MESA_FORMAT_LAYOUT_BPTC:
      return _mesa_is_desktop_gl(ctx) &&
         ctx->Extensions.ARB_texture_compression_bptc;
   case MESA_FORMAT_LAYOUT_ASTC:
      return ctx->Extensions.KHR_texture_compression_astc_ldr;
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   default:
      return GL_FALSE;
   }
}

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/**
 * Test if the given format represents an sRGB format.
 * \param format the GL format (can be an internal format)
 * \return GL_TRUE if format is sRGB, GL_FALSE otherwise
 */
GLboolean
_mesa_is_srgb_format(GLenum format)
{
   switch (format) {
   case GL_SRGB:
   case GL_SRGB8:
   case GL_SRGB_ALPHA:
   case GL_SRGB8_ALPHA8:
   case GL_COMPRESSED_SRGB:
   case GL_COMPRESSED_SRGB_ALPHA:
   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:
   case GL_COMPRESSED_SRGB8_ETC2:
   case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
   case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
   case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
   case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
      return GL_TRUE;
   default:
      break;
   }

   return GL_FALSE;
}

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/**
 * Convert various unpack formats to the corresponding base format.
 */
GLenum
_mesa_unpack_format_to_base_format(GLenum format)
{
   switch(format) {
   case GL_RED_INTEGER:
      return GL_RED;
   case GL_GREEN_INTEGER:
      return GL_GREEN;
   case GL_BLUE_INTEGER:
      return GL_BLUE;
   case GL_ALPHA_INTEGER:
      return GL_ALPHA;
   case GL_RG_INTEGER:
      return GL_RG;
   case GL_RGB_INTEGER:
      return GL_RGB;
   case GL_RGBA_INTEGER:
      return GL_RGBA;
   case GL_BGR_INTEGER:
      return GL_BGR;
   case GL_BGRA_INTEGER:
      return GL_BGRA;
   case GL_LUMINANCE_INTEGER_EXT:
      return GL_LUMINANCE;
   case GL_LUMINANCE_ALPHA_INTEGER_EXT:
      return GL_LUMINANCE_ALPHA;
   case GL_RED:
   case GL_GREEN:
   case GL_BLUE:
   case GL_RG:
   case GL_RGB:
   case GL_RGBA:
   case GL_BGR:
   case GL_BGRA:
   case GL_ALPHA:
   case GL_LUMINANCE:
   case GL_LUMINANCE_ALPHA:
   default:
      return format;
   }
}
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/**
Anuj Phogat's avatar
Anuj Phogat committed
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 * Convert various base formats to the corresponding integer format.
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 */
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:
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   case GL_INTERNALFORMAT_RED_SIZE:
   case GL_INTERNALFORMAT_RED_TYPE:
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      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:
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   case GL_INTERNALFORMAT_GREEN_SIZE:
   case GL_INTERNALFORMAT_GREEN_TYPE:
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      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:
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   case GL_INTERNALFORMAT_BLUE_SIZE:
   case GL_INTERNALFORMAT_BLUE_TYPE:
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      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:
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   case GL_INTERNALFORMAT_ALPHA_SIZE:
   case GL_INTERNALFORMAT_ALPHA_TYPE:
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      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:
1607
1608
   case GL_INTERNALFORMAT_DEPTH_SIZE:
   case GL_INTERNALFORMAT_DEPTH_TYPE:
1609
1610
1611
1612
1613
1614
1615
      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:
1616
1617
   case GL_INTERNALFORMAT_STENCIL_SIZE:
   case GL_INTERNALFORMAT_STENCIL_TYPE:
1618
1619
1620
1621
1622
1623
1624
      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",
1625
		    __func__, pname);
1626
1627
1628
1629
1630
      return GL_FALSE;
   }

   return GL_FALSE;
}
1631
1632


1633
1634
1635
1636
1637
1638
1639
/**
 * Returns the number of channels/components for a base format.
 */
GLint
_mesa_base_format_component_count(GLenum base_format)
{
   switch (base_format) {
1640
   case GL_LUMINANCE:
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
   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;
   }
}


1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
/**
 * 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;
   }
}


1699
1700
1701
1702
1703
1704
1705
1706
/**
 * 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) {
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
   /* 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;
1724

1725
1726
1727
1728
1729
   /* GL_ARB_texture_rg */
   case GL_RED:
      return GL_R8;
   case GL_RG:
      return GL_RG8;
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
   /* 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;
1758

1759
1760
   default:
      return format;
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
   }
}


/**
 * 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;
1780
   case GL_SLUMINANCE8:
1781
      return GL_LUMINANCE8;
1782
1783
   case GL_SLUMINANCE:
      return GL_LUMINANCE;
1784
   case GL_SLUMINANCE_ALPHA:
1785
1786
      return GL_LUMINANCE_ALPHA;
   case GL_SLUMINANCE8_ALPHA8:
1787
1788
1789
1790
1791
1792
1793
      return GL_LUMINANCE8_ALPHA8;
   default:
      return format;
   }
}


1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
/**
 * 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)
{
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
   /* From OpenGL 3.3 spec, page 220:
    *    "If the format is DEPTH_STENCIL, then values are taken from
    *    both the depth buffer and the stencil buffer. If there is no
    *    depth buffer or if there is no stencil buffer, then the error
    *    INVALID_OPERATION occurs. If the type parameter is not
    *    UNSIGNED_INT_24_8 or FLOAT_32_UNSIGNED_INT_24_8_REV, then the
    *    error INVALID_ENUM occurs."
    *
    * OpenGL ES still generates GL_INVALID_OPERATION because glReadPixels
    * cannot be used to read depth or stencil in that API.
    */
   if (_mesa_is_desktop_gl(ctx) && format == GL_DEPTH_STENCIL
       && type != GL_UNSIGNED_INT_24_8
       && type != GL_FLOAT_32_UNSIGNED_INT_24_8_REV)
      return GL_INVALID_ENUM;

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
   /* special type-based checks (see glReadPixels, glDrawPixels error lists) */
   switch (type) {
   case GL_BITMAP:
      if (format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX) {
         return GL_INVALID_ENUM;
      }
      break;

   case GL_UNSIGNED_BYTE_3_3_2:
   case GL_UNSIGNED_BYTE_2_3_3_REV:
   case GL_UNSIGNED_SHORT_5_6_5:
   case GL_UNSIGNED_SHORT_5_6_5_REV:
      if (format == GL_RGB) {
         break; /* OK */
      }
      if (format == GL_RGB_INTEGER_EXT &&
          ctx->Extensions.ARB_texture_rgb10_a2ui) {
         break; /* OK */
      }
      return GL_INVALID_OPERATION;

   case GL_UNSIGNED_SHORT_4_4_4_4:
   case GL_UNSIGNED_SHORT_4_4_4_4_REV:
   case GL_UNSIGNED_INT_8_8_8_8:
   case GL_UNSIGNED_INT_8_8_8_8_REV:
      if (format == GL_RGBA ||
          format == GL_BGRA ||
          format == GL_ABGR_EXT) {
         break; /* OK */
      }
      if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
          ctx->Extensions.ARB_texture_rgb10_a2ui) {
         break; /* OK */
      }
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
      return GL_INVALID_OPERATION;

   case GL_UNSIGNED_SHORT_5_5_5_1:
   case GL_UNSIGNED_SHORT_1_5_5_5_REV:
   case GL_UNSIGNED_INT_10_10_10_2:
   case GL_UNSIGNED_INT_2_10_10_10_REV:
      if (format == GL_RGBA ||
          format == GL_BGRA) {
         break; /* OK */
      }
      if ((format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT) &&
          ctx->Extensions.ARB_texture_rgb10_a2ui) {
         break; /* OK */
      }
1873
1874
1875
1876
      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 */
      }
1877
1878
1879
      return GL_INVALID_OPERATION;

   case GL_UNSIGNED_INT_24_8:
1880
1881
1882
1883
      /* Depth buffer OK to read in OpenGL ES (NV_read_depth). */
      if (ctx->API == API_OPENGLES2 && format == GL_DEPTH_COMPONENT)
         return GL_NO_ERROR;

1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
      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;

1907
1908
1909
1910
1911
1912
1913
1914
   case GL_HALF_FLOAT_OES:
      switch (format) {
      case GL_RGBA:
      case GL_RGB:
      case GL_LUMINANCE_ALPHA:
      case GL_LUMINANCE:
      case GL_ALPHA:
         return GL_NO_ERROR;
1915
1916
1917
1918
      case GL_RG:
      case GL_RED:
	 if (_mesa_is_gles3(ctx) || ctx->Extensions.ARB_texture_rg)
            return GL_NO_ERROR;
1919
1920
1921
1922
      default:
         return GL_INVALID_OPERATION;
      }

1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
   default:
      ; /* fall-through */
   }

   /* now, for each format, check the type for compatibility */
   switch (format) {
      case GL_COLOR_INDEX:
      case GL_STENCIL_INDEX:
         switch (type) {
            case GL_BITMAP:
            case GL_BYTE:
            case GL_UNSIGNED_BYTE:
            case GL_SHORT:
            case GL_UNSIGNED_SHORT:
            case GL_INT:
            case GL_UNSIGNED_INT:
            case GL_FLOAT:
            case GL_HALF_FLOAT:
1941
               return GL_NO_ERROR;
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
            default:
               return GL_INVALID_ENUM;
         }

      case GL_RED:
      case GL_GREEN:
      case GL_BLUE:
      case GL_ALPHA:
#if 0 /* not legal!  see table 3.6 of the 1.5 spec */
      case GL_INTENSITY:
#endif
      case GL_LUMINANCE:
      case GL_LUMINANCE_ALPHA:
      case GL_DEPTH_COMPONENT:
         switch (type) {
            case GL_BYTE:
            case GL_UNSIGNED_BYTE:
            case GL_SHORT:
            case GL_UNSIGNED_SHORT:
            case GL_INT:
            case GL_UNSIGNED_INT:
            case GL_FLOAT:
            case GL_HALF_FLOAT:
1965
               return GL_NO_ERROR;
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
            default:
               return GL_INVALID_ENUM;
         }

      case GL_RG:
	 if (!ctx->Extensions.ARB_texture_rg)
	    return GL_INVALID_ENUM;
         switch (type) {
            case GL_BYTE:
            case GL_UNSIGNED_BYTE:
            case GL_SHORT:
            case GL_UNSIGNED_SHORT:
            case GL_INT:
            case GL_UNSIGNED_INT:
            case GL_FLOAT:
            case GL_HALF_FLOAT:
1982
               return GL_NO_ERROR;
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
            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:
2000
            case GL_HALF_FLOAT:
2001
               return GL_NO_ERROR;
2002
2003
2004
2005
            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;
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
            case GL_UNSIGNED_INT_5_9_9_9_REV:
               return ctx->Extensions.EXT_texture_shared_exponent
                  ? GL_NO_ERROR : GL_INVALID_ENUM;
            case GL_UNSIGNED_INT_10F_11F_11F_REV:
               return ctx->Extensions.EXT_packed_float
                  ? GL_NO_ERROR : GL_INVALID_ENUM;
            default:
               return GL_INVALID_ENUM;
         }

      case GL_BGR:
         switch (type) {
            /* NOTE: no packed types are supported with BGR.  That's
             * intentional, according to the GL spec.
             */
            case GL_BYTE:
            case GL_UNSIGNED_BYTE:
            case GL_SHORT:
            case GL_UNSIGNED_SHORT:
            case GL_INT:
            case GL_UNSIGNED_INT:
            case GL_FLOAT:
            case GL_HALF_FLOAT:
2029
               return GL_NO_ERROR;
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
            default:
               return GL_INVALID_ENUM;
         }

      case GL_RGBA:
      case GL_BGRA:
         switch (type) {
            case GL_BYTE:
            case GL_UNSIGNED_BYTE:
            case GL_SHORT:
            case GL_UNSIGNED_SHORT:
            case GL_INT:
            case GL_UNSIGNED_INT:
            case GL_FLOAT:
            case GL_UNSIGNED_SHORT_4_4_4_4:
            case GL_UNSIGNED_SHORT_4_4_4_4_REV:
            case GL_UNSIGNED_SHORT_5_5_5_1:
            case GL_UNSIGNED_SHORT_1_5_5_5_REV:
            case GL_UNSIGNED_INT_8_8_8_8:
            case GL_UNSIGNED_INT_8_8_8_8_REV:
            case GL_UNSIGNED_INT_10_10_10_2:
            case GL_UNSIGNED_INT_2_10_10_10_REV:
            case GL_HALF_FLOAT:
2053
               return GL_NO_ERROR;
2054
2055
2056
2057
            default:
               return GL_INVALID_ENUM;
         }

2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
      case GL_ABGR_EXT:
         switch (type) {
            case GL_BYTE:
            case GL_UNSIGNED_BYTE:
            case GL_SHORT:
            case GL_UNSIGNED_SHORT:
            case GL_INT:
            case GL_UNSIGNED_INT:
            case GL_FLOAT:
            case GL_UNSIGNED_SHORT_4_4_4_4:
            case GL_UNSIGNED_SHORT_4_4_4_4_REV:
            case GL_UNSIGNED_INT_8_8_8_8:
            case GL_UNSIGNED_INT_8_8_8_8_REV:
            case GL_HALF_FLOAT:
               return GL_NO_ERROR;
            default:
               return GL_INVALID_ENUM;
         }

2077
2078
2079
2080
2081
2082
2083
2084
2085
      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;

2086
      case GL_DEPTH_STENCIL:
2087
         if (type == GL_UNSIGNED_INT_24_8)
2088
2089
2090
2091
            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;
2092
         else
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
            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:
2108
               return (ctx->Version >= 30 ||
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
                       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:
2123
               return (ctx->Version >= 30 ||
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
                       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 */
2145
               return (ctx->Version >= 30 ||
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
                       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:
2161
               return (ctx->Version >= 30 ||
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                       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;
}
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2205


/**
 * Do error checking of format/type combinations for OpenGL ES glReadPixels
 * and glTex[Sub]Image.
 * \return error code, or GL_NO_ERROR.
 */
GLenum
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_mesa_es_error_check_format_and_type(const struct gl_context *ctx,
                                     GLenum format, GLenum type,
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                                     unsigned dimensions)
{
   GLboolean type_valid = GL_TRUE;

   switch (format) {
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   case GL_RED:
   case GL_RG:
      if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_texture_rg)
         return GL_INVALID_VALUE;
      /* fallthrough */
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   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
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                    || (ctx->Extensions.EXT_texture_type_2_10_10_10_REV &&
                        type == GL_UNSIGNED_INT_2_10_10_10_REV));
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      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;
}
2274

2275
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2277
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/**
 * Return the simple base format for a given internal texture format.
 * For example, given GL_LUMINANCE12_ALPHA4, return GL_LUMINANCE_ALPHA.
 *
 * \param ctx GL context.
 * \param internalFormat the internal texture format token or 1, 2, 3, or 4.
 *
 * \return the corresponding \u base internal format (GL_ALPHA, GL_LUMINANCE,
 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA), or -1 if invalid enum.
 *
 * This is the format which is used during texture application (i.e. the
 * texture format and env mode determine the arithmetic used.
 */
GLint
_mesa_base_tex_format(const struct gl_context *ctx, GLint internalFormat)
{
   switch (internalFormat) {
   case GL_ALPHA:
   case GL_ALPHA4:
   case GL_ALPHA8:
   case GL_ALPHA12:
   case GL_ALPHA16:
      return (ctx->API != API_OPENGL_CORE) ? GL_ALPHA : -1;
   case 1:
   case GL_LUMINANCE:
   case GL_LUMINANCE4:
   case GL_LUMINANCE8:
   case GL_LUMINANCE12:
   case GL_LUMINANCE16:
      return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE : -1;
   case 2:
   case GL_LUMINANCE_ALPHA:
   case GL_LUMINANCE4_ALPHA4:
   case GL_LUMINANCE6_ALPHA2:
   case GL_LUMINANCE8_ALPHA8:
   case GL_LUMINANCE12_ALPHA4:
   case GL_LUMINANCE12_ALPHA12:
   case GL_LUMINANCE16_ALPHA16:
      return (ctx->API != API_OPENGL_CORE) ? GL_LUMINANCE_ALPHA : -1;
   case GL_INTENSITY:
   case GL_INTENSITY4:
   case GL_INTENSITY8:
   case GL_INTENSITY12:
   case GL_INTENSITY16:
      return (ctx->API != API_OPENGL_CORE) ? GL_INTENSITY : -1;
   case 3:
      return (ctx->API != API_OPENGL_CORE) ? GL_RGB : -1;
   case GL_RGB:
   case GL_R3_G3_B2:
   case GL_RGB4:
   case GL_RGB5:
   case GL_RGB8:
   case GL_RGB10:
   case GL_RGB12:
   case GL_RGB16:
      return GL_RGB;
   case 4:
      return (ctx->API != API_OPENGL_CORE) ? GL_RGBA : -1;
   case GL_RGBA:
   case GL_RGBA2:
   case GL_RGBA4:
   case GL_RGB5_A1:
   case GL_RGBA8:
   case GL_RGB10_A2:
   case GL_RGBA12:
   case GL_RGBA16:
      return GL_RGBA;
   default:
      ; /* fallthrough */
   }

   /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
    */
   if (_mesa_is_gles(ctx)) {
      switch (internalFormat) {
      case GL_BGRA:
         return GL_RGBA;
      default:
         ; /* fallthrough */
      }
   }

   if (ctx->Extensions.ARB_ES2_compatibility) {
      switch (internalFormat) {
      case GL_RGB565:
         return GL_RGB;
      default:
         ; /* fallthrough */
      }
   }

   if (ctx->Extensions.ARB_depth_texture) {
      switch (internalFormat) {
      case GL_DEPTH_COMPONENT:
      case GL_DEPTH_COMPONENT16:
      case GL_DEPTH_COMPONENT24:
      case GL_DEPTH_COMPONENT32:
         return GL_DEPTH_COMPONENT;
      case GL_DEPTH_STENCIL:
      case GL_DEPTH24_STENCIL8:
         return GL_DEPTH_STENCIL;
      default:
         ; /* fallthrough */
      }
   }

   if (ctx->Extensions.ARB_texture_stencil8) {
      switch (internalFormat) {
      case GL_STENCIL_INDEX:
      case GL_STENCIL_INDEX1:
      case GL_STENCIL_INDEX4:
      case GL_STENCIL_INDEX8:
      case GL_STENCIL_INDEX16:
         return GL_STENCIL_INDEX;
      default:
         ; /* fallthrough */
      }
   }

   switch (internalFormat) {
   case GL_COMPRESSED_ALPHA:
      return GL_ALPHA;
   case GL_COMPRESSED_LUMINANCE:
      return GL_LUMINANCE;
   case GL_COMPRESSED_LUMINANCE_ALPHA:
      return GL_LUMINANCE_ALPHA;
   case GL_COMPRESSED_INTENSITY:
      return GL_INTENSITY;
   case GL_COMPRESSED_RGB:
      return GL_RGB;
   case GL_COMPRESSED_RGBA:
      return GL_RGBA;
   default:
      ; /* fallthrough */
   }

2411
2412
2413
2414
2415
   if (_mesa_is_compressed_format(ctx, internalFormat)) {
      GLenum base_compressed =
         _mesa_gl_compressed_format_base_format(internalFormat);
      if (base_compressed)
            return base_compressed;
2416
2417
   }

2418
2419
2420
2421
   if ((ctx->Extensions.KHR_texture_compression_astc_ldr &&
        is_astc_2d_format(internalFormat)) ||
       (ctx->Extensions.OES_texture_compression_astc &&
        is_astc_3d_format(internalFormat)))
2422
        return GL_RGBA;
2423
2424
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2426
2427
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2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
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2447
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2487