framework/opengl/gluTextureUtil.cpp

   1 /*-------------------------------------------------------------------------
   2  * drawElements Quality Program OpenGL ES Utilities
   3  * ------------------------------------------------
   4  *
   5  * Copyright 2014 The Android Open Source Project
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  *//*!
  20  * \file
  21  * \brief Texture format utilities.
  22  *//*--------------------------------------------------------------------*/
  23
  24 #include "gluTextureUtil.hpp"
  25 #include "gluRenderContext.hpp"
  26 #include "gluContextInfo.hpp"
  27 #include "gluTexture.hpp"
  28 #include "tcuTextureUtil.hpp"
  29 #include "tcuFormatUtil.hpp"
  30 #include "glwEnums.hpp"
  31
  32 namespace glu
  33 {
  34
  35 using std::string;
  36
  37 /*--------------------------------------------------------------------*//*!
  38  * \brief Map tcu::TextureFormat to GL pixel transfer format.
  39  *
  40  * Maps generic texture format description to GL pixel transfer format.
  41  * If no mapping is found, throws tcu::InternalError.
  42  *
  43  * \param texFormat Generic texture format.
  44  * \return GL pixel transfer format.
  45  *//*--------------------------------------------------------------------*/
  46 TransferFormat getTransferFormat (tcu::TextureFormat texFormat)
  47 {
  48         using tcu::TextureFormat;
  49
  50         deUint32        format  = GL_NONE;
  51         deUint32        type    = GL_NONE;
  52         bool            isInt   = false;
  53
  54         switch (texFormat.type)
  55         {
  56                 case TextureFormat::SIGNED_INT8:
  57                 case TextureFormat::SIGNED_INT16:
  58                 case TextureFormat::SIGNED_INT32:
  59                 case TextureFormat::UNSIGNED_INT8:
  60                 case TextureFormat::UNSIGNED_INT16:
  61                 case TextureFormat::UNSIGNED_INT32:
  62                 case TextureFormat::UNSIGNED_INT_1010102_REV:
  63                         isInt = true;
  64                         break;
  65
  66                 default:
  67                         isInt = false;
  68                         break;
  69         }
  70
  71         switch (texFormat.order)
  72         {
  73                 case TextureFormat::A:          format = GL_ALPHA;                                                              break;
  74                 case TextureFormat::L:          format = GL_LUMINANCE;                                                  break;
  75                 case TextureFormat::LA:         format = GL_LUMINANCE_ALPHA;                                    break;
  76                 case TextureFormat::R:          format = isInt ? GL_RED_INTEGER         : GL_RED;       break;
  77                 case TextureFormat::RG:         format = isInt ? GL_RG_INTEGER          : GL_RG;        break;
  78                 case TextureFormat::RGB:        format = isInt ? GL_RGB_INTEGER         : GL_RGB;       break;
  79                 case TextureFormat::RGBA:       format = isInt ? GL_RGBA_INTEGER        : GL_RGBA;      break;
  80                 case TextureFormat::sR:         format = GL_RED;                                                                break;
  81                 case TextureFormat::sRG:        format = GL_RG;                                                                 break;
  82                 case TextureFormat::sRGB:       format = GL_RGB;                                                                break;
  83                 case TextureFormat::sRGBA:      format = GL_RGBA;                                                               break;
  84                 case TextureFormat::D:          format = GL_DEPTH_COMPONENT;                                    break;
  85                 case TextureFormat::DS:         format = GL_DEPTH_STENCIL;                                              break;
  86                 case TextureFormat::S:          format = GL_STENCIL_INDEX;                                              break;
  87
  88                 case TextureFormat::BGRA:
  89                         DE_ASSERT(!isInt);
  90                         format = GL_BGRA;
  91                         break;
  92
  93                 default:
  94                         DE_ASSERT(false);
  95         }
  96
  97         switch (texFormat.type)
  98         {
  99                 case TextureFormat::SNORM_INT8:                                         type = GL_BYTE;                                                         break;
 100                 case TextureFormat::SNORM_INT16:                                        type = GL_SHORT;                                                        break;
 101                 case TextureFormat::UNORM_INT8:                                         type = GL_UNSIGNED_BYTE;                                        break;
 102                 case TextureFormat::UNORM_INT16:                                        type = GL_UNSIGNED_SHORT;                                       break;
 103                 case TextureFormat::UNORM_SHORT_565:                            type = GL_UNSIGNED_SHORT_5_6_5;                         break;
 104                 case TextureFormat::UNORM_SHORT_4444:                           type = GL_UNSIGNED_SHORT_4_4_4_4;                       break;
 105                 case TextureFormat::UNORM_SHORT_5551:                           type = GL_UNSIGNED_SHORT_5_5_5_1;                       break;
 106                 case TextureFormat::SIGNED_INT8:                                        type = GL_BYTE;                                                         break;
 107                 case TextureFormat::SIGNED_INT16:                                       type = GL_SHORT;                                                        break;
 108                 case TextureFormat::SIGNED_INT32:                                       type = GL_INT;                                                          break;
 109                 case TextureFormat::UNSIGNED_INT8:                                      type = GL_UNSIGNED_BYTE;                                        break;
 110                 case TextureFormat::UNSIGNED_INT16:                                     type = GL_UNSIGNED_SHORT;                                       break;
 111                 case TextureFormat::UNSIGNED_INT32:                                     type = GL_UNSIGNED_INT;                                         break;
 112                 case TextureFormat::FLOAT:                                                      type = GL_FLOAT;                                                        break;
 113                 case TextureFormat::UNORM_INT_101010:                           type = GL_UNSIGNED_INT_2_10_10_10_REV;          break;
 114                 case TextureFormat::UNORM_INT_1010102_REV:                      type = GL_UNSIGNED_INT_2_10_10_10_REV;          break;
 115                 case TextureFormat::UNSIGNED_INT_1010102_REV:           type = GL_UNSIGNED_INT_2_10_10_10_REV;          break;
 116                 case TextureFormat::UNSIGNED_INT_11F_11F_10F_REV:       type = GL_UNSIGNED_INT_10F_11F_11F_REV;         break;
 117                 case TextureFormat::UNSIGNED_INT_999_E5_REV:            type = GL_UNSIGNED_INT_5_9_9_9_REV;                     break;
 118                 case TextureFormat::HALF_FLOAT:                                         type = GL_HALF_FLOAT;                                           break;
 119                 case TextureFormat::FLOAT_UNSIGNED_INT_24_8_REV:        type = GL_FLOAT_32_UNSIGNED_INT_24_8_REV;       break;
 120                 case TextureFormat::UNSIGNED_INT_24_8:                          type = texFormat.order == TextureFormat::D
 121                                                                                                                                  ? GL_UNSIGNED_INT
 122                                                                                                                                  : GL_UNSIGNED_INT_24_8;                                break;
 123
 124                 default:
 125                         throw tcu::InternalError("Can't map texture format to GL transfer format");
 126         }
 127
 128         return TransferFormat(format, type);
 129 }
 130
 131 /*--------------------------------------------------------------------*//*!
 132  * \brief Map tcu::TextureFormat to GL internal sized format.
 133  *
 134  * Maps generic texture format description to GL internal format.
 135  * If no mapping is found, throws tcu::InternalError.
 136  *
 137  * \param texFormat Generic texture format.
 138  * \return GL sized internal format.
 139  *//*--------------------------------------------------------------------*/
 140 deUint32 getInternalFormat (tcu::TextureFormat texFormat)
 141 {
 142         DE_STATIC_ASSERT(tcu::TextureFormat::CHANNELORDER_LAST < (1<<16));
 143         DE_STATIC_ASSERT(tcu::TextureFormat::CHANNELTYPE_LAST < (1<<16));
 144
 145 #define PACK_FMT(ORDER, TYPE) ((int(ORDER) << 16) | int(TYPE))
 146 #define FMT_CASE(ORDER, TYPE) PACK_FMT(tcu::TextureFormat::ORDER, tcu::TextureFormat::TYPE)
 147
 148         switch (PACK_FMT(texFormat.order, texFormat.type))
 149         {
 150                 case FMT_CASE(RGBA,             UNORM_SHORT_5551):                              return GL_RGB5_A1;
 151                 case FMT_CASE(RGBA,             UNORM_SHORT_4444):                              return GL_RGBA4;
 152                 case FMT_CASE(RGB,              UNORM_SHORT_565):                               return GL_RGB565;
 153                 case FMT_CASE(D,                UNORM_INT16):                                   return GL_DEPTH_COMPONENT16;
 154                 case FMT_CASE(S,                UNSIGNED_INT8):                                 return GL_STENCIL_INDEX8;
 155
 156                 case FMT_CASE(RGBA,             FLOAT):                                                 return GL_RGBA32F;
 157                 case FMT_CASE(RGBA,             SIGNED_INT32):                                  return GL_RGBA32I;
 158                 case FMT_CASE(RGBA,             UNSIGNED_INT32):                                return GL_RGBA32UI;
 159                 case FMT_CASE(RGBA,             UNORM_INT16):                                   return GL_RGBA16;
 160                 case FMT_CASE(RGBA,             SNORM_INT16):                                   return GL_RGBA16_SNORM;
 161                 case FMT_CASE(RGBA,             HALF_FLOAT):                                    return GL_RGBA16F;
 162                 case FMT_CASE(RGBA,             SIGNED_INT16):                                  return GL_RGBA16I;
 163                 case FMT_CASE(RGBA,             UNSIGNED_INT16):                                return GL_RGBA16UI;
 164                 case FMT_CASE(RGBA,             UNORM_INT8):                                    return GL_RGBA8;
 165                 case FMT_CASE(RGBA,             SIGNED_INT8):                                   return GL_RGBA8I;
 166                 case FMT_CASE(RGBA,             UNSIGNED_INT8):                                 return GL_RGBA8UI;
 167                 case FMT_CASE(sRGBA,    UNORM_INT8):                                    return GL_SRGB8_ALPHA8;
 168                 case FMT_CASE(RGBA,             UNORM_INT_1010102_REV):                 return GL_RGB10_A2;
 169                 case FMT_CASE(RGBA,             UNSIGNED_INT_1010102_REV):              return GL_RGB10_A2UI;
 170                 case FMT_CASE(RGBA,             SNORM_INT8):                                    return GL_RGBA8_SNORM;
 171
 172                 case FMT_CASE(RGB,              UNORM_INT8):                                    return GL_RGB8;
 173                 case FMT_CASE(RGB,              UNSIGNED_INT_11F_11F_10F_REV):  return GL_R11F_G11F_B10F;
 174                 case FMT_CASE(RGB,              FLOAT):                                                 return GL_RGB32F;
 175                 case FMT_CASE(RGB,              SIGNED_INT32):                                  return GL_RGB32I;
 176                 case FMT_CASE(RGB,              UNSIGNED_INT32):                                return GL_RGB32UI;
 177                 case FMT_CASE(RGB,              UNORM_INT16):                                   return GL_RGB16;
 178                 case FMT_CASE(RGB,              SNORM_INT16):                                   return GL_RGB16_SNORM;
 179                 case FMT_CASE(RGB,              HALF_FLOAT):                                    return GL_RGB16F;
 180                 case FMT_CASE(RGB,              SIGNED_INT16):                                  return GL_RGB16I;
 181                 case FMT_CASE(RGB,              UNSIGNED_INT16):                                return GL_RGB16UI;
 182                 case FMT_CASE(RGB,              SNORM_INT8):                                    return GL_RGB8_SNORM;
 183                 case FMT_CASE(RGB,              SIGNED_INT8):                                   return GL_RGB8I;
 184                 case FMT_CASE(RGB,              UNSIGNED_INT8):                                 return GL_RGB8UI;
 185                 case FMT_CASE(sRGB,             UNORM_INT8):                                    return GL_SRGB8;
 186                 case FMT_CASE(RGB,              UNSIGNED_INT_999_E5_REV):               return GL_RGB9_E5;
 187                 case FMT_CASE(RGB,              UNORM_INT_1010102_REV):                 return GL_RGB10;
 188
 189                 case FMT_CASE(RG,               FLOAT):                                                 return GL_RG32F;
 190                 case FMT_CASE(RG,               SIGNED_INT32):                                  return GL_RG32I;
 191                 case FMT_CASE(RG,               UNSIGNED_INT32):                                return GL_RG32UI;
 192                 case FMT_CASE(RG,               UNORM_INT16):                                   return GL_RG16;
 193                 case FMT_CASE(RG,               SNORM_INT16):                                   return GL_RG16_SNORM;
 194                 case FMT_CASE(RG,               HALF_FLOAT):                                    return GL_RG16F;
 195                 case FMT_CASE(RG,               SIGNED_INT16):                                  return GL_RG16I;
 196                 case FMT_CASE(RG,               UNSIGNED_INT16):                                return GL_RG16UI;
 197                 case FMT_CASE(RG,               UNORM_INT8):                                    return GL_RG8;
 198                 case FMT_CASE(RG,               SIGNED_INT8):                                   return GL_RG8I;
 199                 case FMT_CASE(RG,               UNSIGNED_INT8):                                 return GL_RG8UI;
 200                 case FMT_CASE(RG,               SNORM_INT8):                                    return GL_RG8_SNORM;
 201                 case FMT_CASE(sRG,              UNORM_INT8):                                    return GL_SRG8_EXT;
 202
 203                 case FMT_CASE(R,                FLOAT):                                                 return GL_R32F;
 204                 case FMT_CASE(R,                SIGNED_INT32):                                  return GL_R32I;
 205                 case FMT_CASE(R,                UNSIGNED_INT32):                                return GL_R32UI;
 206                 case FMT_CASE(R,                UNORM_INT16):                                   return GL_R16;
 207                 case FMT_CASE(R,                SNORM_INT16):                                   return GL_R16_SNORM;
 208                 case FMT_CASE(R,                HALF_FLOAT):                                    return GL_R16F;
 209                 case FMT_CASE(R,                SIGNED_INT16):                                  return GL_R16I;
 210                 case FMT_CASE(R,                UNSIGNED_INT16):                                return GL_R16UI;
 211                 case FMT_CASE(R,                UNORM_INT8):                                    return GL_R8;
 212                 case FMT_CASE(R,                SIGNED_INT8):                                   return GL_R8I;
 213                 case FMT_CASE(R,                UNSIGNED_INT8):                                 return GL_R8UI;
 214                 case FMT_CASE(R,                SNORM_INT8):                                    return GL_R8_SNORM;
 215                 case FMT_CASE(sR,               UNORM_INT8):                                    return GL_SR8_EXT;
 216
 217                 case FMT_CASE(D,                FLOAT):                                                 return GL_DEPTH_COMPONENT32F;
 218                 case FMT_CASE(D,                UNSIGNED_INT_24_8):                             return GL_DEPTH_COMPONENT24;
 219                 case FMT_CASE(D,                UNSIGNED_INT32):                                return GL_DEPTH_COMPONENT32;
 220                 case FMT_CASE(DS,               FLOAT_UNSIGNED_INT_24_8_REV):   return GL_DEPTH32F_STENCIL8;
 221                 case FMT_CASE(DS,               UNSIGNED_INT_24_8):                             return GL_DEPTH24_STENCIL8;
 222
 223                 default:
 224                         throw tcu::InternalError("Can't map texture format to GL internal format");
 225         }
 226 }
 227
 228 /*--------------------------------------------------------------------*//*!
 229  * \brief Map generic compressed format to GL compressed format enum.
 230  *
 231  * Maps generic compressed format to GL compressed format enum value.
 232  * If no mapping is found, throws tcu::InternalError.
 233  *
 234  * \param format Generic compressed format.
 235  * \return GL compressed texture format.
 236  *//*--------------------------------------------------------------------*/
 237 deUint32 getGLFormat (tcu::CompressedTexFormat format)
 238 {
 239         switch (format)
 240         {
 241                 case tcu::COMPRESSEDTEXFORMAT_ETC1_RGB8:                                                return GL_ETC1_RGB8_OES;
 242                 case tcu::COMPRESSEDTEXFORMAT_EAC_R11:                                                  return GL_COMPRESSED_R11_EAC;
 243                 case tcu::COMPRESSEDTEXFORMAT_EAC_SIGNED_R11:                                   return GL_COMPRESSED_SIGNED_R11_EAC;
 244                 case tcu::COMPRESSEDTEXFORMAT_EAC_RG11:                                                 return GL_COMPRESSED_RG11_EAC;
 245                 case tcu::COMPRESSEDTEXFORMAT_EAC_SIGNED_RG11:                                  return GL_COMPRESSED_SIGNED_RG11_EAC;
 246                 case tcu::COMPRESSEDTEXFORMAT_ETC2_RGB8:                                                return GL_COMPRESSED_RGB8_ETC2;
 247                 case tcu::COMPRESSEDTEXFORMAT_ETC2_SRGB8:                                               return GL_COMPRESSED_SRGB8_ETC2;
 248                 case tcu::COMPRESSEDTEXFORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:    return GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2;
 249                 case tcu::COMPRESSEDTEXFORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:   return GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2;
 250                 case tcu::COMPRESSEDTEXFORMAT_ETC2_EAC_RGBA8:                                   return GL_COMPRESSED_RGBA8_ETC2_EAC;
 251                 case tcu::COMPRESSEDTEXFORMAT_ETC2_EAC_SRGB8_ALPHA8:                    return GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC;
 252
 253                 case tcu::COMPRESSEDTEXFORMAT_ASTC_4x4_RGBA:                                    return GL_COMPRESSED_RGBA_ASTC_4x4_KHR;
 254                 case tcu::COMPRESSEDTEXFORMAT_ASTC_5x4_RGBA:                                    return GL_COMPRESSED_RGBA_ASTC_5x4_KHR;
 255                 case tcu::COMPRESSEDTEXFORMAT_ASTC_5x5_RGBA:                                    return GL_COMPRESSED_RGBA_ASTC_5x5_KHR;
 256                 case tcu::COMPRESSEDTEXFORMAT_ASTC_6x5_RGBA:                                    return GL_COMPRESSED_RGBA_ASTC_6x5_KHR;
 257                 case tcu::COMPRESSEDTEXFORMAT_ASTC_6x6_RGBA:                                    return GL_COMPRESSED_RGBA_ASTC_6x6_KHR;
 258                 case tcu::COMPRESSEDTEXFORMAT_ASTC_8x5_RGBA:                                    return GL_COMPRESSED_RGBA_ASTC_8x5_KHR;
 259                 case tcu::COMPRESSEDTEXFORMAT_ASTC_8x6_RGBA:                                    return GL_COMPRESSED_RGBA_ASTC_8x6_KHR;
 260                 case tcu::COMPRESSEDTEXFORMAT_ASTC_8x8_RGBA:                                    return GL_COMPRESSED_RGBA_ASTC_8x8_KHR;
 261                 case tcu::COMPRESSEDTEXFORMAT_ASTC_10x5_RGBA:                                   return GL_COMPRESSED_RGBA_ASTC_10x5_KHR;
 262                 case tcu::COMPRESSEDTEXFORMAT_ASTC_10x6_RGBA:                                   return GL_COMPRESSED_RGBA_ASTC_10x6_KHR;
 263                 case tcu::COMPRESSEDTEXFORMAT_ASTC_10x8_RGBA:                                   return GL_COMPRESSED_RGBA_ASTC_10x8_KHR;
 264                 case tcu::COMPRESSEDTEXFORMAT_ASTC_10x10_RGBA:                                  return GL_COMPRESSED_RGBA_ASTC_10x10_KHR;
 265                 case tcu::COMPRESSEDTEXFORMAT_ASTC_12x10_RGBA:                                  return GL_COMPRESSED_RGBA_ASTC_12x10_KHR;
 266                 case tcu::COMPRESSEDTEXFORMAT_ASTC_12x12_RGBA:                                  return GL_COMPRESSED_RGBA_ASTC_12x12_KHR;
 267                 case tcu::COMPRESSEDTEXFORMAT_ASTC_4x4_SRGB8_ALPHA8:                    return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR;
 268                 case tcu::COMPRESSEDTEXFORMAT_ASTC_5x4_SRGB8_ALPHA8:                    return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR;
 269                 case tcu::COMPRESSEDTEXFORMAT_ASTC_5x5_SRGB8_ALPHA8:                    return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR;
 270                 case tcu::COMPRESSEDTEXFORMAT_ASTC_6x5_SRGB8_ALPHA8:                    return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR;
 271                 case tcu::COMPRESSEDTEXFORMAT_ASTC_6x6_SRGB8_ALPHA8:                    return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR;
 272                 case tcu::COMPRESSEDTEXFORMAT_ASTC_8x5_SRGB8_ALPHA8:                    return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR;
 273                 case tcu::COMPRESSEDTEXFORMAT_ASTC_8x6_SRGB8_ALPHA8:                    return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR;
 274                 case tcu::COMPRESSEDTEXFORMAT_ASTC_8x8_SRGB8_ALPHA8:                    return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR;
 275                 case tcu::COMPRESSEDTEXFORMAT_ASTC_10x5_SRGB8_ALPHA8:                   return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR;
 276                 case tcu::COMPRESSEDTEXFORMAT_ASTC_10x6_SRGB8_ALPHA8:                   return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR;
 277                 case tcu::COMPRESSEDTEXFORMAT_ASTC_10x8_SRGB8_ALPHA8:                   return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR;
 278                 case tcu::COMPRESSEDTEXFORMAT_ASTC_10x10_SRGB8_ALPHA8:                  return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR;
 279                 case tcu::COMPRESSEDTEXFORMAT_ASTC_12x10_SRGB8_ALPHA8:                  return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR;
 280                 case tcu::COMPRESSEDTEXFORMAT_ASTC_12x12_SRGB8_ALPHA8:                  return GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR;
 281
 282                 default:
 283                         throw tcu::InternalError("Can't map compressed format to GL format");
 284         }
 285 }
 286
 287 /*--------------------------------------------------------------------*//*!
 288  * \brief Map compressed GL format to generic compressed format.
 289  *
 290  * Maps compressed GL format to generic compressed format.
 291  * If no mapping is found, throws tcu::InternalError.
 292  *
 293  * \param GL compressed texture format.
 294  * \return format Generic compressed format.
 295  *//*--------------------------------------------------------------------*/
 296 tcu::CompressedTexFormat mapGLCompressedTexFormat (deUint32 format)
 297 {
 298         switch (format)
 299         {
 300                 case GL_ETC1_RGB8_OES:                                                          return tcu::COMPRESSEDTEXFORMAT_ETC1_RGB8;
 301                 case GL_COMPRESSED_R11_EAC:                                                     return tcu::COMPRESSEDTEXFORMAT_EAC_R11;
 302                 case GL_COMPRESSED_SIGNED_R11_EAC:                                      return tcu::COMPRESSEDTEXFORMAT_EAC_SIGNED_R11;
 303                 case GL_COMPRESSED_RG11_EAC:                                            return tcu::COMPRESSEDTEXFORMAT_EAC_RG11;
 304                 case GL_COMPRESSED_SIGNED_RG11_EAC:                                     return tcu::COMPRESSEDTEXFORMAT_EAC_SIGNED_RG11;
 305                 case GL_COMPRESSED_RGB8_ETC2:                                           return tcu::COMPRESSEDTEXFORMAT_ETC2_RGB8;
 306                 case GL_COMPRESSED_SRGB8_ETC2:                                          return tcu::COMPRESSEDTEXFORMAT_ETC2_SRGB8;
 307                 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:       return tcu::COMPRESSEDTEXFORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1;
 308                 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:      return tcu::COMPRESSEDTEXFORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1;
 309                 case GL_COMPRESSED_RGBA8_ETC2_EAC:                                      return tcu::COMPRESSEDTEXFORMAT_ETC2_EAC_RGBA8;
 310                 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:                       return tcu::COMPRESSEDTEXFORMAT_ETC2_EAC_SRGB8_ALPHA8;
 311
 312                 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:                           return tcu::COMPRESSEDTEXFORMAT_ASTC_4x4_RGBA;
 313                 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:                           return tcu::COMPRESSEDTEXFORMAT_ASTC_5x4_RGBA;
 314                 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:                           return tcu::COMPRESSEDTEXFORMAT_ASTC_5x5_RGBA;
 315                 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:                           return tcu::COMPRESSEDTEXFORMAT_ASTC_6x5_RGBA;
 316                 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:                           return tcu::COMPRESSEDTEXFORMAT_ASTC_6x6_RGBA;
 317                 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:                           return tcu::COMPRESSEDTEXFORMAT_ASTC_8x5_RGBA;
 318                 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:                           return tcu::COMPRESSEDTEXFORMAT_ASTC_8x6_RGBA;
 319                 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:                           return tcu::COMPRESSEDTEXFORMAT_ASTC_8x8_RGBA;
 320                 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:                          return tcu::COMPRESSEDTEXFORMAT_ASTC_10x5_RGBA;
 321                 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:                          return tcu::COMPRESSEDTEXFORMAT_ASTC_10x6_RGBA;
 322                 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:                          return tcu::COMPRESSEDTEXFORMAT_ASTC_10x8_RGBA;
 323                 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:                         return tcu::COMPRESSEDTEXFORMAT_ASTC_10x10_RGBA;
 324                 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:                         return tcu::COMPRESSEDTEXFORMAT_ASTC_12x10_RGBA;
 325                 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:                         return tcu::COMPRESSEDTEXFORMAT_ASTC_12x12_RGBA;
 326                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:           return tcu::COMPRESSEDTEXFORMAT_ASTC_4x4_SRGB8_ALPHA8;
 327                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:           return tcu::COMPRESSEDTEXFORMAT_ASTC_5x4_SRGB8_ALPHA8;
 328                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:           return tcu::COMPRESSEDTEXFORMAT_ASTC_5x5_SRGB8_ALPHA8;
 329                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:           return tcu::COMPRESSEDTEXFORMAT_ASTC_6x5_SRGB8_ALPHA8;
 330                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:           return tcu::COMPRESSEDTEXFORMAT_ASTC_6x6_SRGB8_ALPHA8;
 331                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:           return tcu::COMPRESSEDTEXFORMAT_ASTC_8x5_SRGB8_ALPHA8;
 332                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:           return tcu::COMPRESSEDTEXFORMAT_ASTC_8x6_SRGB8_ALPHA8;
 333                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:           return tcu::COMPRESSEDTEXFORMAT_ASTC_8x8_SRGB8_ALPHA8;
 334                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:          return tcu::COMPRESSEDTEXFORMAT_ASTC_10x5_SRGB8_ALPHA8;
 335                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:          return tcu::COMPRESSEDTEXFORMAT_ASTC_10x6_SRGB8_ALPHA8;
 336                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:          return tcu::COMPRESSEDTEXFORMAT_ASTC_10x8_SRGB8_ALPHA8;
 337                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:         return tcu::COMPRESSEDTEXFORMAT_ASTC_10x10_SRGB8_ALPHA8;
 338                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:         return tcu::COMPRESSEDTEXFORMAT_ASTC_12x10_SRGB8_ALPHA8;
 339                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:         return tcu::COMPRESSEDTEXFORMAT_ASTC_12x12_SRGB8_ALPHA8;
 340
 341                 default:
 342                         throw tcu::InternalError("Can't map compressed GL format to compressed format");
 343         }
 344 }
 345
 346 bool isCompressedFormat (deUint32 internalFormat)
 347 {
 348         switch (internalFormat)
 349         {
 350                 case GL_ETC1_RGB8_OES:
 351                 case GL_COMPRESSED_R11_EAC:
 352                 case GL_COMPRESSED_SIGNED_R11_EAC:
 353                 case GL_COMPRESSED_RG11_EAC:
 354                 case GL_COMPRESSED_SIGNED_RG11_EAC:
 355                 case GL_COMPRESSED_RGB8_ETC2:
 356                 case GL_COMPRESSED_SRGB8_ETC2:
 357                 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
 358                 case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
 359                 case GL_COMPRESSED_RGBA8_ETC2_EAC:
 360                 case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
 361                 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
 362                 case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
 363                 case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
 364                 case GL_COMPRESSED_RGBA_ASTC_6x5_KHR:
 365                 case GL_COMPRESSED_RGBA_ASTC_6x6_KHR:
 366                 case GL_COMPRESSED_RGBA_ASTC_8x5_KHR:
 367                 case GL_COMPRESSED_RGBA_ASTC_8x6_KHR:
 368                 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
 369                 case GL_COMPRESSED_RGBA_ASTC_10x5_KHR:
 370                 case GL_COMPRESSED_RGBA_ASTC_10x6_KHR:
 371                 case GL_COMPRESSED_RGBA_ASTC_10x8_KHR:
 372                 case GL_COMPRESSED_RGBA_ASTC_10x10_KHR:
 373                 case GL_COMPRESSED_RGBA_ASTC_12x10_KHR:
 374                 case GL_COMPRESSED_RGBA_ASTC_12x12_KHR:
 375                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
 376                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
 377                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
 378                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
 379                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
 380                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
 381                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
 382                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
 383                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
 384                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
 385                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
 386                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
 387                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
 388                 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
 389                         return true;
 390
 391                 default:
 392                         return false;
 393         }
 394 }
 395
 396 static tcu::TextureFormat::ChannelType mapGLChannelType (deUint32 dataType, bool normalized)
 397 {
 398         // \note Normalized bit is ignored where it doesn't apply.
 399         using tcu::TextureFormat;
 400
 401         switch (dataType)
 402         {
 403                 case GL_UNSIGNED_BYTE:                                  return normalized ? TextureFormat::UNORM_INT8   : TextureFormat::UNSIGNED_INT8;
 404                 case GL_BYTE:                                                   return normalized ? TextureFormat::SNORM_INT8   : TextureFormat::SIGNED_INT8;
 405                 case GL_UNSIGNED_SHORT:                                 return normalized ? TextureFormat::UNORM_INT16  : TextureFormat::UNSIGNED_INT16;
 406                 case GL_SHORT:                                                  return normalized ? TextureFormat::SNORM_INT16  : TextureFormat::SIGNED_INT16;
 407                 case GL_UNSIGNED_INT:                                   return normalized ? TextureFormat::UNORM_INT32  : TextureFormat::UNSIGNED_INT32;
 408                 case GL_INT:                                                    return normalized ? TextureFormat::SNORM_INT32  : TextureFormat::SIGNED_INT32;
 409                 case GL_FLOAT:                                                  return TextureFormat::FLOAT;
 410                 case GL_UNSIGNED_SHORT_4_4_4_4:                 return TextureFormat::UNORM_SHORT_4444;
 411                 case GL_UNSIGNED_SHORT_5_5_5_1:                 return TextureFormat::UNORM_SHORT_5551;
 412                 case GL_UNSIGNED_SHORT_5_6_5:                   return TextureFormat::UNORM_SHORT_565;
 413                 case GL_HALF_FLOAT:                                             return TextureFormat::HALF_FLOAT;
 414                 case GL_UNSIGNED_INT_2_10_10_10_REV:    return normalized ? TextureFormat::UNORM_INT_1010102_REV : TextureFormat::UNSIGNED_INT_1010102_REV;
 415                 case GL_UNSIGNED_INT_10F_11F_11F_REV:   return TextureFormat::UNSIGNED_INT_11F_11F_10F_REV;
 416                 case GL_UNSIGNED_INT_24_8:                              return TextureFormat::UNSIGNED_INT_24_8;
 417                 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV: return TextureFormat::FLOAT_UNSIGNED_INT_24_8_REV;
 418                 case GL_UNSIGNED_INT_5_9_9_9_REV:               return TextureFormat::UNSIGNED_INT_999_E5_REV;
 419
 420                 // GL_OES_texture_half_float
 421                 case GL_HALF_FLOAT_OES:                                 return TextureFormat::HALF_FLOAT;
 422
 423                 default:
 424                         DE_ASSERT(false);
 425                         return TextureFormat::CHANNELTYPE_LAST;
 426         }
 427 }
 428
 429 /*--------------------------------------------------------------------*//*!
 430  * \brief Map GL pixel transfer format to tcu::TextureFormat.
 431  *
 432  * If no mapping is found, throws tcu::InternalError.
 433  *
 434  * \param format        GL pixel format.
 435  * \param dataType      GL data type.
 436  * \return Generic texture format.
 437  *//*--------------------------------------------------------------------*/
 438 tcu::TextureFormat mapGLTransferFormat (deUint32 format, deUint32 dataType)
 439 {
 440         using tcu::TextureFormat;
 441         switch (format)
 442         {
 443                 case GL_ALPHA:                          return TextureFormat(TextureFormat::A,          mapGLChannelType(dataType, true));
 444                 case GL_LUMINANCE:                      return TextureFormat(TextureFormat::L,          mapGLChannelType(dataType, true));
 445                 case GL_LUMINANCE_ALPHA:        return TextureFormat(TextureFormat::LA,         mapGLChannelType(dataType, true));
 446                 case GL_RGB:                            return TextureFormat(TextureFormat::RGB,        mapGLChannelType(dataType, true));
 447                 case GL_RGBA:                           return TextureFormat(TextureFormat::RGBA,       mapGLChannelType(dataType, true));
 448                 case GL_BGRA:                           return TextureFormat(TextureFormat::BGRA,       mapGLChannelType(dataType, true));
 449                 case GL_RG:                                     return TextureFormat(TextureFormat::RG,         mapGLChannelType(dataType, true));
 450                 case GL_RED:                            return TextureFormat(TextureFormat::R,          mapGLChannelType(dataType, true));
 451                 case GL_RGBA_INTEGER:           return TextureFormat(TextureFormat::RGBA,       mapGLChannelType(dataType, false));
 452                 case GL_RGB_INTEGER:            return TextureFormat(TextureFormat::RGB,        mapGLChannelType(dataType, false));
 453                 case GL_RG_INTEGER:                     return TextureFormat(TextureFormat::RG,         mapGLChannelType(dataType, false));
 454                 case GL_RED_INTEGER:            return TextureFormat(TextureFormat::R,          mapGLChannelType(dataType, false));
 455                 case GL_SRGB:                           return TextureFormat(TextureFormat::sRGB,       mapGLChannelType(dataType, false));
 456                 case GL_SRGB_ALPHA:                     return TextureFormat(TextureFormat::sRGBA,      mapGLChannelType(dataType, false));
 457
 458                 case GL_DEPTH_COMPONENT:        return TextureFormat(TextureFormat::D,          mapGLChannelType(dataType, true));
 459                 case GL_DEPTH_STENCIL:          return TextureFormat(TextureFormat::DS,         mapGLChannelType(dataType, true));
 460
 461                 default:
 462                         throw tcu::InternalError(string("Can't map GL pixel format (") + tcu::toHex(format).toString() + ", " + tcu::toHex(dataType).toString() + ") to texture format");
 463         }
 464 }
 465
 466 /*--------------------------------------------------------------------*//*!
 467  * \brief Map GL internal texture format to tcu::TextureFormat.
 468  *
 469  * If no mapping is found, throws tcu::InternalError.
 470  *
 471  * \param internalFormat Sized internal format.
 472  * \return Generic texture format.
 473  *//*--------------------------------------------------------------------*/
 474 tcu::TextureFormat mapGLInternalFormat (deUint32 internalFormat)
 475 {
 476         using tcu::TextureFormat;
 477         switch (internalFormat)
 478         {
 479                 case GL_RGB5_A1:                        return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNORM_SHORT_5551);
 480                 case GL_RGBA4:                          return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNORM_SHORT_4444);
 481                 case GL_RGB565:                         return TextureFormat(TextureFormat::RGB,        TextureFormat::UNORM_SHORT_565);
 482                 case GL_DEPTH_COMPONENT16:      return TextureFormat(TextureFormat::D,          TextureFormat::UNORM_INT16);
 483                 case GL_STENCIL_INDEX8:         return TextureFormat(TextureFormat::S,          TextureFormat::UNSIGNED_INT8);
 484
 485                 case GL_RGBA32F:                        return TextureFormat(TextureFormat::RGBA,       TextureFormat::FLOAT);
 486                 case GL_RGBA32I:                        return TextureFormat(TextureFormat::RGBA,       TextureFormat::SIGNED_INT32);
 487                 case GL_RGBA32UI:                       return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNSIGNED_INT32);
 488                 case GL_RGBA16:                         return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNORM_INT16);
 489                 case GL_RGBA16_SNORM:           return TextureFormat(TextureFormat::RGBA,       TextureFormat::SNORM_INT16);
 490                 case GL_RGBA16F:                        return TextureFormat(TextureFormat::RGBA,       TextureFormat::HALF_FLOAT);
 491                 case GL_RGBA16I:                        return TextureFormat(TextureFormat::RGBA,       TextureFormat::SIGNED_INT16);
 492                 case GL_RGBA16UI:                       return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNSIGNED_INT16);
 493                 case GL_RGBA8:                          return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNORM_INT8);
 494                 case GL_RGBA8I:                         return TextureFormat(TextureFormat::RGBA,       TextureFormat::SIGNED_INT8);
 495                 case GL_RGBA8UI:                        return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNSIGNED_INT8);
 496                 case GL_SRGB8_ALPHA8:           return TextureFormat(TextureFormat::sRGBA,      TextureFormat::UNORM_INT8);
 497                 case GL_RGB10_A2:                       return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNORM_INT_1010102_REV);
 498                 case GL_RGB10_A2UI:                     return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNSIGNED_INT_1010102_REV);
 499                 case GL_RGBA8_SNORM:            return TextureFormat(TextureFormat::RGBA,       TextureFormat::SNORM_INT8);
 500
 501                 case GL_RGB8:                           return TextureFormat(TextureFormat::RGB,        TextureFormat::UNORM_INT8);
 502                 case GL_R11F_G11F_B10F:         return TextureFormat(TextureFormat::RGB,        TextureFormat::UNSIGNED_INT_11F_11F_10F_REV);
 503                 case GL_RGB32F:                         return TextureFormat(TextureFormat::RGB,        TextureFormat::FLOAT);
 504                 case GL_RGB32I:                         return TextureFormat(TextureFormat::RGB,        TextureFormat::SIGNED_INT32);
 505                 case GL_RGB32UI:                        return TextureFormat(TextureFormat::RGB,        TextureFormat::UNSIGNED_INT32);
 506                 case GL_RGB16:                          return TextureFormat(TextureFormat::RGB,        TextureFormat::UNORM_INT16);
 507                 case GL_RGB16_SNORM:            return TextureFormat(TextureFormat::RGB,        TextureFormat::SNORM_INT16);
 508                 case GL_RGB16F:                         return TextureFormat(TextureFormat::RGB,        TextureFormat::HALF_FLOAT);
 509                 case GL_RGB16I:                         return TextureFormat(TextureFormat::RGB,        TextureFormat::SIGNED_INT16);
 510                 case GL_RGB16UI:                        return TextureFormat(TextureFormat::RGB,        TextureFormat::UNSIGNED_INT16);
 511                 case GL_RGB8_SNORM:                     return TextureFormat(TextureFormat::RGB,        TextureFormat::SNORM_INT8);
 512                 case GL_RGB8I:                          return TextureFormat(TextureFormat::RGB,        TextureFormat::SIGNED_INT8);
 513                 case GL_RGB8UI:                         return TextureFormat(TextureFormat::RGB,        TextureFormat::UNSIGNED_INT8);
 514                 case GL_SRGB8:                          return TextureFormat(TextureFormat::sRGB,       TextureFormat::UNORM_INT8);
 515                 case GL_RGB9_E5:                        return TextureFormat(TextureFormat::RGB,        TextureFormat::UNSIGNED_INT_999_E5_REV);
 516                 case GL_RGB10:                          return TextureFormat(TextureFormat::RGB,        TextureFormat::UNORM_INT_1010102_REV);
 517
 518                 case GL_RG32F:                          return TextureFormat(TextureFormat::RG,         TextureFormat::FLOAT);
 519                 case GL_RG32I:                          return TextureFormat(TextureFormat::RG,         TextureFormat::SIGNED_INT32);
 520                 case GL_RG32UI:                         return TextureFormat(TextureFormat::RG,         TextureFormat::UNSIGNED_INT32);
 521                 case GL_RG16:                           return TextureFormat(TextureFormat::RG,         TextureFormat::UNORM_INT16);
 522                 case GL_RG16_SNORM:                     return TextureFormat(TextureFormat::RG,         TextureFormat::SNORM_INT16);
 523                 case GL_RG16F:                          return TextureFormat(TextureFormat::RG,         TextureFormat::HALF_FLOAT);
 524                 case GL_RG16I:                          return TextureFormat(TextureFormat::RG,         TextureFormat::SIGNED_INT16);
 525                 case GL_RG16UI:                         return TextureFormat(TextureFormat::RG,         TextureFormat::UNSIGNED_INT16);
 526                 case GL_RG8:                            return TextureFormat(TextureFormat::RG,         TextureFormat::UNORM_INT8);
 527                 case GL_RG8I:                           return TextureFormat(TextureFormat::RG,         TextureFormat::SIGNED_INT8);
 528                 case GL_RG8UI:                          return TextureFormat(TextureFormat::RG,         TextureFormat::UNSIGNED_INT8);
 529                 case GL_RG8_SNORM:                      return TextureFormat(TextureFormat::RG,         TextureFormat::SNORM_INT8);
 530                 case GL_SRG8_EXT:                       return TextureFormat(TextureFormat::sRG,        TextureFormat::UNORM_INT8);
 531
 532                 case GL_R32F:                           return TextureFormat(TextureFormat::R,          TextureFormat::FLOAT);
 533                 case GL_R32I:                           return TextureFormat(TextureFormat::R,          TextureFormat::SIGNED_INT32);
 534                 case GL_R32UI:                          return TextureFormat(TextureFormat::R,          TextureFormat::UNSIGNED_INT32);
 535                 case GL_R16:                            return TextureFormat(TextureFormat::R,          TextureFormat::UNORM_INT16);
 536                 case GL_R16_SNORM:                      return TextureFormat(TextureFormat::R,          TextureFormat::SNORM_INT16);
 537                 case GL_R16F:                           return TextureFormat(TextureFormat::R,          TextureFormat::HALF_FLOAT);
 538                 case GL_R16I:                           return TextureFormat(TextureFormat::R,          TextureFormat::SIGNED_INT16);
 539                 case GL_R16UI:                          return TextureFormat(TextureFormat::R,          TextureFormat::UNSIGNED_INT16);
 540                 case GL_R8:                                     return TextureFormat(TextureFormat::R,          TextureFormat::UNORM_INT8);
 541                 case GL_R8I:                            return TextureFormat(TextureFormat::R,          TextureFormat::SIGNED_INT8);
 542                 case GL_R8UI:                           return TextureFormat(TextureFormat::R,          TextureFormat::UNSIGNED_INT8);
 543                 case GL_R8_SNORM:                       return TextureFormat(TextureFormat::R,          TextureFormat::SNORM_INT8);
 544                 case GL_SR8_EXT:                        return TextureFormat(TextureFormat::sR,         TextureFormat::UNORM_INT8);
 545
 546                 case GL_DEPTH_COMPONENT32F:     return TextureFormat(TextureFormat::D,          TextureFormat::FLOAT);
 547                 case GL_DEPTH_COMPONENT24:      return TextureFormat(TextureFormat::D,          TextureFormat::UNSIGNED_INT_24_8);
 548                 case GL_DEPTH_COMPONENT32:      return TextureFormat(TextureFormat::D,          TextureFormat::UNSIGNED_INT32);
 549                 case GL_DEPTH32F_STENCIL8:      return TextureFormat(TextureFormat::DS,         TextureFormat::FLOAT_UNSIGNED_INT_24_8_REV);
 550                 case GL_DEPTH24_STENCIL8:       return TextureFormat(TextureFormat::DS,         TextureFormat::UNSIGNED_INT_24_8);
 551
 552                 default:
 553                         throw tcu::InternalError(string("Can't map GL sized internal format (") + tcu::toHex(internalFormat).toString() + ") to texture format");
 554         }
 555 }
 556
 557 bool isGLInternalColorFormatFilterable (deUint32 format)
 558 {
 559         switch (format)
 560         {
 561                 case GL_R8:
 562                 case GL_R8_SNORM:
 563                 case GL_RG8:
 564                 case GL_RG8_SNORM:
 565                 case GL_RGB8:
 566                 case GL_RGB8_SNORM:
 567                 case GL_RGB565:
 568                 case GL_RGBA4:
 569                 case GL_RGB5_A1:
 570                 case GL_RGBA8:
 571                 case GL_RGBA8_SNORM:
 572                 case GL_RGB10_A2:
 573                 case GL_SR8_EXT:
 574                 case GL_SRG8_EXT:
 575                 case GL_SRGB8:
 576                 case GL_SRGB8_ALPHA8:
 577                 case GL_R16F:
 578                 case GL_RG16F:
 579                 case GL_RGB16F:
 580                 case GL_RGBA16F:
 581                 case GL_R11F_G11F_B10F:
 582                 case GL_RGB9_E5:
 583                         return true;
 584
 585                 case GL_RGB10_A2UI:
 586                 case GL_R32F:
 587                 case GL_RG32F:
 588                 case GL_RGB32F:
 589                 case GL_RGBA32F:
 590                 case GL_R8I:
 591                 case GL_R8UI:
 592                 case GL_R16I:
 593                 case GL_R16UI:
 594                 case GL_R32I:
 595                 case GL_R32UI:
 596                 case GL_RG8I:
 597                 case GL_RG8UI:
 598                 case GL_RG16I:
 599                 case GL_RG16UI:
 600                 case GL_RG32I:
 601                 case GL_RG32UI:
 602                 case GL_RGB8I:
 603                 case GL_RGB8UI:
 604                 case GL_RGB16I:
 605                 case GL_RGB16UI:
 606                 case GL_RGB32I:
 607                 case GL_RGB32UI:
 608                 case GL_RGBA8I:
 609                 case GL_RGBA8UI:
 610                 case GL_RGBA16I:
 611                 case GL_RGBA16UI:
 612                 case GL_RGBA32I:
 613                 case GL_RGBA32UI:
 614                         return false;
 615
 616                 default:
 617                         DE_ASSERT(false);
 618                         return false;
 619         }
 620 }
 621
 622 static inline tcu::Sampler::WrapMode mapGLWrapMode (deUint32 wrapMode)
 623 {
 624         switch (wrapMode)
 625         {
 626                 case GL_CLAMP_TO_EDGE:          return tcu::Sampler::CLAMP_TO_EDGE;
 627                 case GL_CLAMP_TO_BORDER:        return tcu::Sampler::CLAMP_TO_BORDER;
 628                 case GL_REPEAT:                         return tcu::Sampler::REPEAT_GL;
 629                 case GL_MIRRORED_REPEAT:        return tcu::Sampler::MIRRORED_REPEAT_GL;
 630                 default:
 631                         throw tcu::InternalError("Can't map GL wrap mode " + tcu::toHex(wrapMode).toString());
 632         }
 633 }
 634
 635 static inline tcu::Sampler::FilterMode mapGLMinFilterMode (deUint32 filterMode)
 636 {
 637         switch (filterMode)
 638         {
 639                 case GL_NEAREST:                                return tcu::Sampler::NEAREST;
 640                 case GL_LINEAR:                                 return tcu::Sampler::LINEAR;
 641                 case GL_NEAREST_MIPMAP_NEAREST: return tcu::Sampler::NEAREST_MIPMAP_NEAREST;
 642                 case GL_NEAREST_MIPMAP_LINEAR:  return tcu::Sampler::NEAREST_MIPMAP_LINEAR;
 643                 case GL_LINEAR_MIPMAP_NEAREST:  return tcu::Sampler::LINEAR_MIPMAP_NEAREST;
 644                 case GL_LINEAR_MIPMAP_LINEAR:   return tcu::Sampler::LINEAR_MIPMAP_LINEAR;
 645                 default:
 646                         throw tcu::InternalError("Can't map GL min filter mode" + tcu::toHex(filterMode).toString());
 647         }
 648 }
 649
 650 static inline tcu::Sampler::FilterMode mapGLMagFilterMode (deUint32 filterMode)
 651 {
 652         switch (filterMode)
 653         {
 654                 case GL_NEAREST:                                return tcu::Sampler::NEAREST;
 655                 case GL_LINEAR:                                 return tcu::Sampler::LINEAR;
 656                 default:
 657                         throw tcu::InternalError("Can't map GL mag filter mode" + tcu::toHex(filterMode).toString());
 658         }
 659 }
 660
 661 /*--------------------------------------------------------------------*//*!
 662  * \brief Map GL sampler parameters to tcu::Sampler.
 663  *
 664  * If no mapping is found, throws tcu::InternalError.
 665  *
 666  * \param wrapS         S-component wrap mode
 667  * \param minFilter     Minification filter mode
 668  * \param magFilter     Magnification filter mode
 669  * \return Sampler description.
 670  *//*--------------------------------------------------------------------*/
 671 tcu::Sampler mapGLSampler (deUint32 wrapS, deUint32 minFilter, deUint32 magFilter)
 672 {
 673         return mapGLSampler(wrapS, wrapS, wrapS, minFilter, magFilter);
 674 }
 675
 676
 677 /*--------------------------------------------------------------------*//*!
 678  * \brief Map GL sampler parameters to tcu::Sampler.
 679  *
 680  * If no mapping is found, throws tcu::InternalError.
 681  *
 682  * \param wrapS         S-component wrap mode
 683  * \param wrapT         T-component wrap mode
 684  * \param minFilter     Minification filter mode
 685  * \param magFilter     Magnification filter mode
 686  * \return Sampler description.
 687  *//*--------------------------------------------------------------------*/
 688 tcu::Sampler mapGLSampler (deUint32 wrapS, deUint32 wrapT, deUint32 minFilter, deUint32 magFilter)
 689 {
 690         return mapGLSampler(wrapS, wrapT, wrapS, minFilter, magFilter);
 691 }
 692
 693 /*--------------------------------------------------------------------*//*!
 694  * \brief Map GL sampler parameters to tcu::Sampler.
 695  *
 696  * If no mapping is found, throws tcu::InternalError.
 697  *
 698  * \param wrapS         S-component wrap mode
 699  * \param wrapT         T-component wrap mode
 700  * \param wrapR         R-component wrap mode
 701  * \param minFilter     Minification filter mode
 702  * \param magFilter     Magnification filter mode
 703  * \return Sampler description.
 704  *//*--------------------------------------------------------------------*/
 705 tcu::Sampler mapGLSampler (deUint32 wrapS, deUint32 wrapT, deUint32 wrapR, deUint32 minFilter, deUint32 magFilter)
 706 {
 707         return tcu::Sampler(mapGLWrapMode(wrapS), mapGLWrapMode(wrapT), mapGLWrapMode(wrapR),
 708                                                 mapGLMinFilterMode(minFilter), mapGLMagFilterMode(magFilter),
 709                                                 0.0f /* lod threshold */,
 710                                                 true /* normalized coords */,
 711                                                 tcu::Sampler::COMPAREMODE_NONE /* no compare */,
 712                                                 0 /* compare channel */,
 713                                                 tcu::Vec4(0.0f) /* border color, not used */);
 714 }
 715
 716 /*--------------------------------------------------------------------*//*!
 717  * \brief Map GL compare function to tcu::Sampler::CompareMode.
 718  *
 719  * If no mapping is found, throws tcu::InternalError.
 720  *
 721  * \param mode GL compare mode
 722  * \return Compare mode
 723  *//*--------------------------------------------------------------------*/
 724 tcu::Sampler::CompareMode mapGLCompareFunc (deUint32 mode)
 725 {
 726         switch (mode)
 727         {
 728                 case GL_LESS:           return tcu::Sampler::COMPAREMODE_LESS;
 729                 case GL_LEQUAL:         return tcu::Sampler::COMPAREMODE_LESS_OR_EQUAL;
 730                 case GL_GREATER:        return tcu::Sampler::COMPAREMODE_GREATER;
 731                 case GL_GEQUAL:         return tcu::Sampler::COMPAREMODE_GREATER_OR_EQUAL;
 732                 case GL_EQUAL:          return tcu::Sampler::COMPAREMODE_EQUAL;
 733                 case GL_NOTEQUAL:       return tcu::Sampler::COMPAREMODE_NOT_EQUAL;
 734                 case GL_ALWAYS:         return tcu::Sampler::COMPAREMODE_ALWAYS;
 735                 case GL_NEVER:          return tcu::Sampler::COMPAREMODE_NEVER;
 736                 default:
 737                         throw tcu::InternalError("Can't map GL compare mode " + tcu::toHex(mode).toString());
 738         }
 739 }
 740
 741 /*--------------------------------------------------------------------*//*!
 742  * \brief Get GL wrap mode.
 743  *
 744  * If no mapping is found, throws tcu::InternalError.
 745  *
 746  * \param wrapMode Wrap mode
 747  * \return GL wrap mode
 748  *//*--------------------------------------------------------------------*/
 749 deUint32 getGLWrapMode (tcu::Sampler::WrapMode wrapMode)
 750 {
 751         DE_ASSERT(wrapMode != tcu::Sampler::WRAPMODE_LAST);
 752         switch (wrapMode)
 753         {
 754                 case tcu::Sampler::CLAMP_TO_EDGE:               return GL_CLAMP_TO_EDGE;
 755                 case tcu::Sampler::CLAMP_TO_BORDER:             return GL_CLAMP_TO_BORDER;
 756                 case tcu::Sampler::REPEAT_GL:                   return GL_REPEAT;
 757                 case tcu::Sampler::MIRRORED_REPEAT_GL:  return GL_MIRRORED_REPEAT;
 758                 default:
 759                         throw tcu::InternalError("Can't map wrap mode");
 760         }
 761 }
 762
 763 /*--------------------------------------------------------------------*//*!
 764  * \brief Get GL filter mode.
 765  *
 766  * If no mapping is found, throws tcu::InternalError.
 767  *
 768  * \param filterMode Filter mode
 769  * \return GL filter mode
 770  *//*--------------------------------------------------------------------*/
 771 deUint32 getGLFilterMode (tcu::Sampler::FilterMode filterMode)
 772 {
 773         DE_ASSERT(filterMode != tcu::Sampler::FILTERMODE_LAST);
 774         switch (filterMode)
 775         {
 776                 case tcu::Sampler::NEAREST:                                     return GL_NEAREST;
 777                 case tcu::Sampler::LINEAR:                                      return GL_LINEAR;
 778                 case tcu::Sampler::NEAREST_MIPMAP_NEAREST:      return GL_NEAREST_MIPMAP_NEAREST;
 779                 case tcu::Sampler::NEAREST_MIPMAP_LINEAR:       return GL_NEAREST_MIPMAP_LINEAR;
 780                 case tcu::Sampler::LINEAR_MIPMAP_NEAREST:       return GL_LINEAR_MIPMAP_NEAREST;
 781                 case tcu::Sampler::LINEAR_MIPMAP_LINEAR:        return GL_LINEAR_MIPMAP_LINEAR;
 782                 default:
 783                         throw tcu::InternalError("Can't map filter mode");
 784         }
 785 }
 786
 787 /*--------------------------------------------------------------------*//*!
 788  * \brief Get GL compare mode.
 789  *
 790  * If no mapping is found, throws tcu::InternalError.
 791  *
 792  * \param compareMode Compare mode
 793  * \return GL compare mode
 794  *//*--------------------------------------------------------------------*/
 795 deUint32 getGLCompareFunc (tcu::Sampler::CompareMode compareMode)
 796 {
 797         DE_ASSERT(compareMode != tcu::Sampler::COMPAREMODE_NONE);
 798         switch (compareMode)
 799         {
 800                 case tcu::Sampler::COMPAREMODE_NONE:                            return GL_NONE;
 801                 case tcu::Sampler::COMPAREMODE_LESS:                            return GL_LESS;
 802                 case tcu::Sampler::COMPAREMODE_LESS_OR_EQUAL:           return GL_LEQUAL;
 803                 case tcu::Sampler::COMPAREMODE_GREATER:                         return GL_GREATER;
 804                 case tcu::Sampler::COMPAREMODE_GREATER_OR_EQUAL:        return GL_GEQUAL;
 805                 case tcu::Sampler::COMPAREMODE_EQUAL:                           return GL_EQUAL;
 806                 case tcu::Sampler::COMPAREMODE_NOT_EQUAL:                       return GL_NOTEQUAL;
 807                 case tcu::Sampler::COMPAREMODE_ALWAYS:                          return GL_ALWAYS;
 808                 case tcu::Sampler::COMPAREMODE_NEVER:                           return GL_NEVER;
 809                 default:
 810                         throw tcu::InternalError("Can't map compare mode");
 811         }
 812 }
 813
 814 /*--------------------------------------------------------------------*//*!
 815  * \brief Get GL cube face.
 816  *
 817  * If no mapping is found, throws tcu::InternalError.
 818  *
 819  * \param face Cube face
 820  * \return GL cube face
 821  *//*--------------------------------------------------------------------*/
 822 deUint32 getGLCubeFace (tcu::CubeFace face)
 823 {
 824         DE_ASSERT(face != tcu::CUBEFACE_LAST);
 825         switch (face)
 826         {
 827                 case tcu::CUBEFACE_NEGATIVE_X:  return GL_TEXTURE_CUBE_MAP_NEGATIVE_X;
 828                 case tcu::CUBEFACE_POSITIVE_X:  return GL_TEXTURE_CUBE_MAP_POSITIVE_X;
 829                 case tcu::CUBEFACE_NEGATIVE_Y:  return GL_TEXTURE_CUBE_MAP_NEGATIVE_Y;
 830                 case tcu::CUBEFACE_POSITIVE_Y:  return GL_TEXTURE_CUBE_MAP_POSITIVE_Y;
 831                 case tcu::CUBEFACE_NEGATIVE_Z:  return GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;
 832                 case tcu::CUBEFACE_POSITIVE_Z:  return GL_TEXTURE_CUBE_MAP_POSITIVE_Z;
 833                 default:
 834                         throw tcu::InternalError("Can't map cube face");
 835         }
 836 }
 837
 838 tcu::CubeFace getCubeFaceFromGL (deUint32 face)
 839 {
 840         switch (face)
 841         {
 842                 case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:    return tcu::CUBEFACE_NEGATIVE_X;
 843                 case GL_TEXTURE_CUBE_MAP_POSITIVE_X:    return tcu::CUBEFACE_POSITIVE_X;
 844                 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:    return tcu::CUBEFACE_NEGATIVE_Y;
 845                 case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:    return tcu::CUBEFACE_POSITIVE_Y;
 846                 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:    return tcu::CUBEFACE_NEGATIVE_Z;
 847                 case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:    return tcu::CUBEFACE_POSITIVE_Z;
 848                 default:
 849                         throw tcu::InternalError("Can't map cube face");
 850         }
 851 }
 852
 853 /*--------------------------------------------------------------------*//*!
 854  * \brief Get GLSL sampler type for texture format.
 855  *
 856  * If no mapping is found, glu::TYPE_LAST is returned.
 857  *
 858  * \param format Texture format
 859  * \return GLSL 1D sampler type for format
 860  *//*--------------------------------------------------------------------*/
 861 DataType getSampler1DType (tcu::TextureFormat format)
 862 {
 863         using tcu::TextureFormat;
 864
 865         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
 866                 return TYPE_SAMPLER_1D;
 867
 868         if (format.order == TextureFormat::S)
 869                 return TYPE_LAST;
 870
 871         switch (tcu::getTextureChannelClass(format.type))
 872         {
 873                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
 874                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
 875                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
 876                         return glu::TYPE_SAMPLER_1D;
 877
 878                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
 879                         return glu::TYPE_INT_SAMPLER_1D;
 880
 881                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
 882                         return glu::TYPE_UINT_SAMPLER_1D;
 883
 884                 default:
 885                         return glu::TYPE_LAST;
 886         }
 887 }
 888
 889 /*--------------------------------------------------------------------*//*!
 890  * \brief Get GLSL sampler type for texture format.
 891  *
 892  * If no mapping is found, glu::TYPE_LAST is returned.
 893  *
 894  * \param format Texture format
 895  * \return GLSL 2D sampler type for format
 896  *//*--------------------------------------------------------------------*/
 897 DataType getSampler2DType (tcu::TextureFormat format)
 898 {
 899         using tcu::TextureFormat;
 900
 901         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
 902                 return TYPE_SAMPLER_2D;
 903
 904         if (format.order == TextureFormat::S)
 905                 return TYPE_LAST;
 906
 907         switch (tcu::getTextureChannelClass(format.type))
 908         {
 909                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
 910                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
 911                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
 912                         return glu::TYPE_SAMPLER_2D;
 913
 914                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
 915                         return glu::TYPE_INT_SAMPLER_2D;
 916
 917                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
 918                         return glu::TYPE_UINT_SAMPLER_2D;
 919
 920                 default:
 921                         return glu::TYPE_LAST;
 922         }
 923 }
 924
 925 /*--------------------------------------------------------------------*//*!
 926  * \brief Get GLSL sampler type for texture format.
 927  *
 928  * If no mapping is found, glu::TYPE_LAST is returned.
 929  *
 930  * \param format Texture format
 931  * \return GLSL cube map sampler type for format
 932  *//*--------------------------------------------------------------------*/
 933 DataType getSamplerCubeType (tcu::TextureFormat format)
 934 {
 935         using tcu::TextureFormat;
 936
 937         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
 938                 return TYPE_SAMPLER_CUBE;
 939
 940         if (format.order == TextureFormat::S)
 941                 return TYPE_LAST;
 942
 943         switch (tcu::getTextureChannelClass(format.type))
 944         {
 945                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
 946                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
 947                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
 948                         return glu::TYPE_SAMPLER_CUBE;
 949
 950                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
 951                         return glu::TYPE_INT_SAMPLER_CUBE;
 952
 953                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
 954                         return glu::TYPE_UINT_SAMPLER_CUBE;
 955
 956                 default:
 957                         return glu::TYPE_LAST;
 958         }
 959 }
 960
 961 /*--------------------------------------------------------------------*//*!
 962  * \brief Get GLSL sampler type for texture format.
 963  *
 964  * If no mapping is found, glu::TYPE_LAST is returned.
 965  *
 966  * \param format Texture format
 967  * \return GLSL 1D array sampler type for format
 968  *//*--------------------------------------------------------------------*/
 969 DataType getSampler1DArrayType (tcu::TextureFormat format)
 970 {
 971         using tcu::TextureFormat;
 972
 973         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
 974                 return TYPE_SAMPLER_1D_ARRAY;
 975
 976         if (format.order == TextureFormat::S)
 977                 return TYPE_LAST;
 978
 979         switch (tcu::getTextureChannelClass(format.type))
 980         {
 981                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
 982                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
 983                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
 984                         return glu::TYPE_SAMPLER_1D_ARRAY;
 985
 986                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
 987                         return glu::TYPE_INT_SAMPLER_1D_ARRAY;
 988
 989                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
 990                         return glu::TYPE_UINT_SAMPLER_1D_ARRAY;
 991
 992                 default:
 993                         return glu::TYPE_LAST;
 994         }
 995 }
 996
 997 /*--------------------------------------------------------------------*//*!
 998  * \brief Get GLSL sampler type for texture format.
 999  *
1000  * If no mapping is found, glu::TYPE_LAST is returned.
1001  *
1002  * \param format Texture format
1003  * \return GLSL 2D array sampler type for format
1004  *//*--------------------------------------------------------------------*/
1005 DataType getSampler2DArrayType (tcu::TextureFormat format)
1006 {
1007         using tcu::TextureFormat;
1008
1009         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
1010                 return TYPE_SAMPLER_2D_ARRAY;
1011
1012         if (format.order == TextureFormat::S)
1013                 return TYPE_LAST;
1014
1015         switch (tcu::getTextureChannelClass(format.type))
1016         {
1017                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
1018                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
1019                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
1020                         return glu::TYPE_SAMPLER_2D_ARRAY;
1021
1022                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
1023                         return glu::TYPE_INT_SAMPLER_2D_ARRAY;
1024
1025                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
1026                         return glu::TYPE_UINT_SAMPLER_2D_ARRAY;
1027
1028                 default:
1029                         return glu::TYPE_LAST;
1030         }
1031 }
1032
1033 /*--------------------------------------------------------------------*//*!
1034  * \brief Get GLSL sampler type for texture format.
1035  *
1036  * If no mapping is found, glu::TYPE_LAST is returned.
1037  *
1038  * \param format Texture format
1039  * \return GLSL 3D sampler type for format
1040  *//*--------------------------------------------------------------------*/
1041 DataType getSampler3DType (tcu::TextureFormat format)
1042 {
1043         using tcu::TextureFormat;
1044
1045         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
1046                 return TYPE_SAMPLER_3D;
1047
1048         if (format.order == TextureFormat::S)
1049                 return TYPE_LAST;
1050
1051         switch (tcu::getTextureChannelClass(format.type))
1052         {
1053                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
1054                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
1055                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
1056                         return glu::TYPE_SAMPLER_3D;
1057
1058                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
1059                         return glu::TYPE_INT_SAMPLER_3D;
1060
1061                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
1062                         return glu::TYPE_UINT_SAMPLER_3D;
1063
1064                 default:
1065                         return glu::TYPE_LAST;
1066         }
1067 }
1068
1069 /*--------------------------------------------------------------------*//*!
1070  * \brief Get GLSL sampler type for texture format.
1071  *
1072  * If no mapping is found, glu::TYPE_LAST is returned.
1073  *
1074  * \param format Texture format
1075  * \return GLSL cube map array sampler type for format
1076  *//*--------------------------------------------------------------------*/
1077 DataType getSamplerCubeArrayType (tcu::TextureFormat format)
1078 {
1079         using tcu::TextureFormat;
1080
1081         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
1082                 return TYPE_SAMPLER_CUBE_ARRAY;
1083
1084         if (format.order == TextureFormat::S)
1085                 return TYPE_LAST;
1086
1087         switch (tcu::getTextureChannelClass(format.type))
1088         {
1089                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
1090                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
1091                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
1092                         return glu::TYPE_SAMPLER_CUBE_ARRAY;
1093
1094                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
1095                         return glu::TYPE_INT_SAMPLER_CUBE_ARRAY;
1096
1097                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
1098                         return glu::TYPE_UINT_SAMPLER_CUBE_ARRAY;
1099
1100                 default:
1101                         return glu::TYPE_LAST;
1102         }
1103 }
1104
1105 enum RenderableType
1106 {
1107         RENDERABLE_COLOR        = (1<<0),
1108         RENDERABLE_DEPTH        = (1<<1),
1109         RENDERABLE_STENCIL      = (1<<2)
1110 };
1111
1112 static deUint32 getRenderableBitsES3 (const ContextInfo& contextInfo, deUint32 internalFormat)
1113 {
1114         switch (internalFormat)
1115         {
1116                 // Color-renderable formats
1117                 case GL_RGBA32I:
1118                 case GL_RGBA32UI:
1119                 case GL_RGBA16I:
1120                 case GL_RGBA16UI:
1121                 case GL_RGBA8:
1122                 case GL_RGBA8I:
1123                 case GL_RGBA8UI:
1124                 case GL_SRGB8_ALPHA8:
1125                 case GL_RGB10_A2:
1126                 case GL_RGB10_A2UI:
1127                 case GL_RGBA4:
1128                 case GL_RGB5_A1:
1129                 case GL_RGB8:
1130                 case GL_RGB565:
1131                 case GL_RG32I:
1132                 case GL_RG32UI:
1133                 case GL_RG16I:
1134                 case GL_RG16UI:
1135                 case GL_RG8:
1136                 case GL_RG8I:
1137                 case GL_RG8UI:
1138                 case GL_R32I:
1139                 case GL_R32UI:
1140                 case GL_R16I:
1141                 case GL_R16UI:
1142                 case GL_R8:
1143                 case GL_R8I:
1144                 case GL_R8UI:
1145                         return RENDERABLE_COLOR;
1146
1147                 // GL_EXT_color_buffer_float
1148                 case GL_RGBA32F:
1149                 case GL_R11F_G11F_B10F:
1150                 case GL_RG32F:
1151                 case GL_R32F:
1152                         if (contextInfo.isExtensionSupported("GL_EXT_color_buffer_float"))
1153                                 return RENDERABLE_COLOR;
1154                         else
1155                                 return 0;
1156
1157                 // GL_EXT_color_buffer_float / GL_EXT_color_buffer_half_float
1158                 case GL_RGBA16F:
1159                 case GL_RG16F:
1160                 case GL_R16F:
1161                         if (contextInfo.isExtensionSupported("GL_EXT_color_buffer_float") ||
1162                                 contextInfo.isExtensionSupported("GL_EXT_color_buffer_half_float"))
1163                                 return RENDERABLE_COLOR;
1164                         else
1165                                 return 0;
1166
1167                 // Depth formats
1168                 case GL_DEPTH_COMPONENT32F:
1169                 case GL_DEPTH_COMPONENT24:
1170                 case GL_DEPTH_COMPONENT16:
1171                         return RENDERABLE_DEPTH;
1172
1173                 // Depth+stencil formats
1174                 case GL_DEPTH32F_STENCIL8:
1175                 case GL_DEPTH24_STENCIL8:
1176                         return RENDERABLE_DEPTH|RENDERABLE_STENCIL;
1177
1178                 // Stencil formats
1179                 case GL_STENCIL_INDEX8:
1180                         return RENDERABLE_STENCIL;
1181
1182                 default:
1183                         return 0;
1184         }
1185 }
1186
1187 /*--------------------------------------------------------------------*//*!
1188  * \brief Check if sized internal format is color-renderable.
1189  * \note Works currently only on ES3 context.
1190  *//*--------------------------------------------------------------------*/
1191 bool isSizedFormatColorRenderable (const RenderContext& renderCtx, const ContextInfo& contextInfo, deUint32 sizedFormat)
1192 {
1193         deUint32 renderable = 0;
1194
1195         if (renderCtx.getType().getAPI() == ApiType::es(3,0))
1196                 renderable = getRenderableBitsES3(contextInfo, sizedFormat);
1197         else
1198                 throw tcu::InternalError("Context type not supported in query");
1199
1200         return (renderable & RENDERABLE_COLOR) != 0;
1201 }
1202
1203 const tcu::IVec2 (&getDefaultGatherOffsets (void))[4]
1204 {
1205         static const tcu::IVec2 s_defaultOffsets[4] =
1206         {
1207                 tcu::IVec2(0, 1),
1208                 tcu::IVec2(1, 1),
1209                 tcu::IVec2(1, 0),
1210                 tcu::IVec2(0, 0),
1211         };
1212         return s_defaultOffsets;
1213 }
1214
1215 tcu::PixelBufferAccess getTextureBufferEffectiveRefTexture (TextureBuffer& buffer, int maxTextureBufferSize)
1216 {
1217         DE_ASSERT(maxTextureBufferSize > 0);
1218
1219         const tcu::PixelBufferAccess& fullAccess = buffer.getFullRefTexture();
1220
1221         return tcu::PixelBufferAccess(fullAccess.getFormat(),
1222                                                                   tcu::IVec3(de::min(fullAccess.getWidth(), maxTextureBufferSize), 1, 1),
1223                                                                   fullAccess.getPitch(),
1224                                                                   fullAccess.getDataPtr());
1225 }
1226
1227 tcu::ConstPixelBufferAccess getTextureBufferEffectiveRefTexture (const TextureBuffer& buffer, int maxTextureBufferSize)
1228 {
1229         return getTextureBufferEffectiveRefTexture(const_cast<TextureBuffer&>(buffer), maxTextureBufferSize);
1230 }
1231
1232 } // glu