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
 456                 case GL_DEPTH_COMPONENT:        return TextureFormat(TextureFormat::D,          mapGLChannelType(dataType, true));
 457                 case GL_DEPTH_STENCIL:          return TextureFormat(TextureFormat::DS,         mapGLChannelType(dataType, true));
 458
 459                 default:
 460                         throw tcu::InternalError(string("Can't map GL pixel format (") + tcu::toHex(format).toString() + ", " + tcu::toHex(dataType).toString() + ") to texture format");
 461         }
 462 }
 463
 464 /*--------------------------------------------------------------------*//*!
 465  * \brief Map GL internal texture format to tcu::TextureFormat.
 466  *
 467  * If no mapping is found, throws tcu::InternalError.
 468  *
 469  * \param internalFormat Sized internal format.
 470  * \return Generic texture format.
 471  *//*--------------------------------------------------------------------*/
 472 tcu::TextureFormat mapGLInternalFormat (deUint32 internalFormat)
 473 {
 474         using tcu::TextureFormat;
 475         switch (internalFormat)
 476         {
 477                 case GL_RGB5_A1:                        return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNORM_SHORT_5551);
 478                 case GL_RGBA4:                          return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNORM_SHORT_4444);
 479                 case GL_RGB565:                         return TextureFormat(TextureFormat::RGB,        TextureFormat::UNORM_SHORT_565);
 480                 case GL_DEPTH_COMPONENT16:      return TextureFormat(TextureFormat::D,          TextureFormat::UNORM_INT16);
 481                 case GL_STENCIL_INDEX8:         return TextureFormat(TextureFormat::S,          TextureFormat::UNSIGNED_INT8);
 482
 483                 case GL_RGBA32F:                        return TextureFormat(TextureFormat::RGBA,       TextureFormat::FLOAT);
 484                 case GL_RGBA32I:                        return TextureFormat(TextureFormat::RGBA,       TextureFormat::SIGNED_INT32);
 485                 case GL_RGBA32UI:                       return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNSIGNED_INT32);
 486                 case GL_RGBA16:                         return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNORM_INT16);
 487                 case GL_RGBA16_SNORM:           return TextureFormat(TextureFormat::RGBA,       TextureFormat::SNORM_INT16);
 488                 case GL_RGBA16F:                        return TextureFormat(TextureFormat::RGBA,       TextureFormat::HALF_FLOAT);
 489                 case GL_RGBA16I:                        return TextureFormat(TextureFormat::RGBA,       TextureFormat::SIGNED_INT16);
 490                 case GL_RGBA16UI:                       return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNSIGNED_INT16);
 491                 case GL_RGBA8:                          return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNORM_INT8);
 492                 case GL_RGBA8I:                         return TextureFormat(TextureFormat::RGBA,       TextureFormat::SIGNED_INT8);
 493                 case GL_RGBA8UI:                        return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNSIGNED_INT8);
 494                 case GL_SRGB8_ALPHA8:           return TextureFormat(TextureFormat::sRGBA,      TextureFormat::UNORM_INT8);
 495                 case GL_RGB10_A2:                       return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNORM_INT_1010102_REV);
 496                 case GL_RGB10_A2UI:                     return TextureFormat(TextureFormat::RGBA,       TextureFormat::UNSIGNED_INT_1010102_REV);
 497                 case GL_RGBA8_SNORM:            return TextureFormat(TextureFormat::RGBA,       TextureFormat::SNORM_INT8);
 498
 499                 case GL_RGB8:                           return TextureFormat(TextureFormat::RGB,        TextureFormat::UNORM_INT8);
 500                 case GL_R11F_G11F_B10F:         return TextureFormat(TextureFormat::RGB,        TextureFormat::UNSIGNED_INT_11F_11F_10F_REV);
 501                 case GL_RGB32F:                         return TextureFormat(TextureFormat::RGB,        TextureFormat::FLOAT);
 502                 case GL_RGB32I:                         return TextureFormat(TextureFormat::RGB,        TextureFormat::SIGNED_INT32);
 503                 case GL_RGB32UI:                        return TextureFormat(TextureFormat::RGB,        TextureFormat::UNSIGNED_INT32);
 504                 case GL_RGB16:                          return TextureFormat(TextureFormat::RGB,        TextureFormat::UNORM_INT16);
 505                 case GL_RGB16_SNORM:            return TextureFormat(TextureFormat::RGB,        TextureFormat::SNORM_INT16);
 506                 case GL_RGB16F:                         return TextureFormat(TextureFormat::RGB,        TextureFormat::HALF_FLOAT);
 507                 case GL_RGB16I:                         return TextureFormat(TextureFormat::RGB,        TextureFormat::SIGNED_INT16);
 508                 case GL_RGB16UI:                        return TextureFormat(TextureFormat::RGB,        TextureFormat::UNSIGNED_INT16);
 509                 case GL_RGB8_SNORM:                     return TextureFormat(TextureFormat::RGB,        TextureFormat::SNORM_INT8);
 510                 case GL_RGB8I:                          return TextureFormat(TextureFormat::RGB,        TextureFormat::SIGNED_INT8);
 511                 case GL_RGB8UI:                         return TextureFormat(TextureFormat::RGB,        TextureFormat::UNSIGNED_INT8);
 512                 case GL_SRGB8:                          return TextureFormat(TextureFormat::sRGB,       TextureFormat::UNORM_INT8);
 513                 case GL_RGB9_E5:                        return TextureFormat(TextureFormat::RGB,        TextureFormat::UNSIGNED_INT_999_E5_REV);
 514                 case GL_RGB10:                          return TextureFormat(TextureFormat::RGB,        TextureFormat::UNORM_INT_1010102_REV);
 515
 516                 case GL_RG32F:                          return TextureFormat(TextureFormat::RG,         TextureFormat::FLOAT);
 517                 case GL_RG32I:                          return TextureFormat(TextureFormat::RG,         TextureFormat::SIGNED_INT32);
 518                 case GL_RG32UI:                         return TextureFormat(TextureFormat::RG,         TextureFormat::UNSIGNED_INT32);
 519                 case GL_RG16:                           return TextureFormat(TextureFormat::RG,         TextureFormat::UNORM_INT16);
 520                 case GL_RG16_SNORM:                     return TextureFormat(TextureFormat::RG,         TextureFormat::SNORM_INT16);
 521                 case GL_RG16F:                          return TextureFormat(TextureFormat::RG,         TextureFormat::HALF_FLOAT);
 522                 case GL_RG16I:                          return TextureFormat(TextureFormat::RG,         TextureFormat::SIGNED_INT16);
 523                 case GL_RG16UI:                         return TextureFormat(TextureFormat::RG,         TextureFormat::UNSIGNED_INT16);
 524                 case GL_RG8:                            return TextureFormat(TextureFormat::RG,         TextureFormat::UNORM_INT8);
 525                 case GL_RG8I:                           return TextureFormat(TextureFormat::RG,         TextureFormat::SIGNED_INT8);
 526                 case GL_RG8UI:                          return TextureFormat(TextureFormat::RG,         TextureFormat::UNSIGNED_INT8);
 527                 case GL_RG8_SNORM:                      return TextureFormat(TextureFormat::RG,         TextureFormat::SNORM_INT8);
 528                 case GL_SRG8_EXT:                       return TextureFormat(TextureFormat::sRG,        TextureFormat::UNORM_INT8);
 529
 530                 case GL_R32F:                           return TextureFormat(TextureFormat::R,          TextureFormat::FLOAT);
 531                 case GL_R32I:                           return TextureFormat(TextureFormat::R,          TextureFormat::SIGNED_INT32);
 532                 case GL_R32UI:                          return TextureFormat(TextureFormat::R,          TextureFormat::UNSIGNED_INT32);
 533                 case GL_R16:                            return TextureFormat(TextureFormat::R,          TextureFormat::UNORM_INT16);
 534                 case GL_R16_SNORM:                      return TextureFormat(TextureFormat::R,          TextureFormat::SNORM_INT16);
 535                 case GL_R16F:                           return TextureFormat(TextureFormat::R,          TextureFormat::HALF_FLOAT);
 536                 case GL_R16I:                           return TextureFormat(TextureFormat::R,          TextureFormat::SIGNED_INT16);
 537                 case GL_R16UI:                          return TextureFormat(TextureFormat::R,          TextureFormat::UNSIGNED_INT16);
 538                 case GL_R8:                                     return TextureFormat(TextureFormat::R,          TextureFormat::UNORM_INT8);
 539                 case GL_R8I:                            return TextureFormat(TextureFormat::R,          TextureFormat::SIGNED_INT8);
 540                 case GL_R8UI:                           return TextureFormat(TextureFormat::R,          TextureFormat::UNSIGNED_INT8);
 541                 case GL_R8_SNORM:                       return TextureFormat(TextureFormat::R,          TextureFormat::SNORM_INT8);
 542                 case GL_SR8_EXT:                        return TextureFormat(TextureFormat::sR,         TextureFormat::UNORM_INT8);
 543
 544                 case GL_DEPTH_COMPONENT32F:     return TextureFormat(TextureFormat::D,          TextureFormat::FLOAT);
 545                 case GL_DEPTH_COMPONENT24:      return TextureFormat(TextureFormat::D,          TextureFormat::UNSIGNED_INT_24_8);
 546                 case GL_DEPTH_COMPONENT32:      return TextureFormat(TextureFormat::D,          TextureFormat::UNSIGNED_INT32);
 547                 case GL_DEPTH32F_STENCIL8:      return TextureFormat(TextureFormat::DS,         TextureFormat::FLOAT_UNSIGNED_INT_24_8_REV);
 548                 case GL_DEPTH24_STENCIL8:       return TextureFormat(TextureFormat::DS,         TextureFormat::UNSIGNED_INT_24_8);
 549
 550                 default:
 551                         throw tcu::InternalError(string("Can't map GL sized internal format (") + tcu::toHex(internalFormat).toString() + ") to texture format");
 552         }
 553 }
 554
 555 bool isGLInternalColorFormatFilterable (deUint32 format)
 556 {
 557         switch (format)
 558         {
 559                 case GL_R8:
 560                 case GL_R8_SNORM:
 561                 case GL_RG8:
 562                 case GL_RG8_SNORM:
 563                 case GL_RGB8:
 564                 case GL_RGB8_SNORM:
 565                 case GL_RGB565:
 566                 case GL_RGBA4:
 567                 case GL_RGB5_A1:
 568                 case GL_RGBA8:
 569                 case GL_RGBA8_SNORM:
 570                 case GL_RGB10_A2:
 571                 case GL_SR8_EXT:
 572                 case GL_SRG8_EXT:
 573                 case GL_SRGB8:
 574                 case GL_SRGB8_ALPHA8:
 575                 case GL_R16F:
 576                 case GL_RG16F:
 577                 case GL_RGB16F:
 578                 case GL_RGBA16F:
 579                 case GL_R11F_G11F_B10F:
 580                 case GL_RGB9_E5:
 581                         return true;
 582
 583                 case GL_RGB10_A2UI:
 584                 case GL_R32F:
 585                 case GL_RG32F:
 586                 case GL_RGB32F:
 587                 case GL_RGBA32F:
 588                 case GL_R8I:
 589                 case GL_R8UI:
 590                 case GL_R16I:
 591                 case GL_R16UI:
 592                 case GL_R32I:
 593                 case GL_R32UI:
 594                 case GL_RG8I:
 595                 case GL_RG8UI:
 596                 case GL_RG16I:
 597                 case GL_RG16UI:
 598                 case GL_RG32I:
 599                 case GL_RG32UI:
 600                 case GL_RGB8I:
 601                 case GL_RGB8UI:
 602                 case GL_RGB16I:
 603                 case GL_RGB16UI:
 604                 case GL_RGB32I:
 605                 case GL_RGB32UI:
 606                 case GL_RGBA8I:
 607                 case GL_RGBA8UI:
 608                 case GL_RGBA16I:
 609                 case GL_RGBA16UI:
 610                 case GL_RGBA32I:
 611                 case GL_RGBA32UI:
 612                         return false;
 613
 614                 default:
 615                         DE_ASSERT(false);
 616                         return false;
 617         }
 618 }
 619
 620 static inline tcu::Sampler::WrapMode mapGLWrapMode (deUint32 wrapMode)
 621 {
 622         switch (wrapMode)
 623         {
 624                 case GL_CLAMP_TO_EDGE:          return tcu::Sampler::CLAMP_TO_EDGE;
 625                 case GL_CLAMP_TO_BORDER:        return tcu::Sampler::CLAMP_TO_BORDER;
 626                 case GL_REPEAT:                         return tcu::Sampler::REPEAT_GL;
 627                 case GL_MIRRORED_REPEAT:        return tcu::Sampler::MIRRORED_REPEAT_GL;
 628                 default:
 629                         throw tcu::InternalError("Can't map GL wrap mode " + tcu::toHex(wrapMode).toString());
 630         }
 631 }
 632
 633 static inline tcu::Sampler::FilterMode mapGLMinFilterMode (deUint32 filterMode)
 634 {
 635         switch (filterMode)
 636         {
 637                 case GL_NEAREST:                                return tcu::Sampler::NEAREST;
 638                 case GL_LINEAR:                                 return tcu::Sampler::LINEAR;
 639                 case GL_NEAREST_MIPMAP_NEAREST: return tcu::Sampler::NEAREST_MIPMAP_NEAREST;
 640                 case GL_NEAREST_MIPMAP_LINEAR:  return tcu::Sampler::NEAREST_MIPMAP_LINEAR;
 641                 case GL_LINEAR_MIPMAP_NEAREST:  return tcu::Sampler::LINEAR_MIPMAP_NEAREST;
 642                 case GL_LINEAR_MIPMAP_LINEAR:   return tcu::Sampler::LINEAR_MIPMAP_LINEAR;
 643                 default:
 644                         throw tcu::InternalError("Can't map GL min filter mode" + tcu::toHex(filterMode).toString());
 645         }
 646 }
 647
 648 static inline tcu::Sampler::FilterMode mapGLMagFilterMode (deUint32 filterMode)
 649 {
 650         switch (filterMode)
 651         {
 652                 case GL_NEAREST:                                return tcu::Sampler::NEAREST;
 653                 case GL_LINEAR:                                 return tcu::Sampler::LINEAR;
 654                 default:
 655                         throw tcu::InternalError("Can't map GL mag filter mode" + tcu::toHex(filterMode).toString());
 656         }
 657 }
 658
 659 /*--------------------------------------------------------------------*//*!
 660  * \brief Map GL sampler parameters to tcu::Sampler.
 661  *
 662  * If no mapping is found, throws tcu::InternalError.
 663  *
 664  * \param wrapS         S-component wrap mode
 665  * \param minFilter     Minification filter mode
 666  * \param magFilter     Magnification filter mode
 667  * \return Sampler description.
 668  *//*--------------------------------------------------------------------*/
 669 tcu::Sampler mapGLSampler (deUint32 wrapS, deUint32 minFilter, deUint32 magFilter)
 670 {
 671         return mapGLSampler(wrapS, wrapS, wrapS, minFilter, magFilter);
 672 }
 673
 674
 675 /*--------------------------------------------------------------------*//*!
 676  * \brief Map GL sampler parameters to tcu::Sampler.
 677  *
 678  * If no mapping is found, throws tcu::InternalError.
 679  *
 680  * \param wrapS         S-component wrap mode
 681  * \param wrapT         T-component wrap mode
 682  * \param minFilter     Minification filter mode
 683  * \param magFilter     Magnification filter mode
 684  * \return Sampler description.
 685  *//*--------------------------------------------------------------------*/
 686 tcu::Sampler mapGLSampler (deUint32 wrapS, deUint32 wrapT, deUint32 minFilter, deUint32 magFilter)
 687 {
 688         return mapGLSampler(wrapS, wrapT, wrapS, minFilter, magFilter);
 689 }
 690
 691 /*--------------------------------------------------------------------*//*!
 692  * \brief Map GL sampler parameters to tcu::Sampler.
 693  *
 694  * If no mapping is found, throws tcu::InternalError.
 695  *
 696  * \param wrapS         S-component wrap mode
 697  * \param wrapT         T-component wrap mode
 698  * \param wrapR         R-component wrap mode
 699  * \param minFilter     Minification filter mode
 700  * \param magFilter     Magnification filter mode
 701  * \return Sampler description.
 702  *//*--------------------------------------------------------------------*/
 703 tcu::Sampler mapGLSampler (deUint32 wrapS, deUint32 wrapT, deUint32 wrapR, deUint32 minFilter, deUint32 magFilter)
 704 {
 705         return tcu::Sampler(mapGLWrapMode(wrapS), mapGLWrapMode(wrapT), mapGLWrapMode(wrapR),
 706                                                 mapGLMinFilterMode(minFilter), mapGLMagFilterMode(magFilter),
 707                                                 0.0f /* lod threshold */,
 708                                                 true /* normalized coords */,
 709                                                 tcu::Sampler::COMPAREMODE_NONE /* no compare */,
 710                                                 0 /* compare channel */,
 711                                                 tcu::Vec4(0.0f) /* border color, not used */);
 712 }
 713
 714 /*--------------------------------------------------------------------*//*!
 715  * \brief Map GL compare function to tcu::Sampler::CompareMode.
 716  *
 717  * If no mapping is found, throws tcu::InternalError.
 718  *
 719  * \param mode GL compare mode
 720  * \return Compare mode
 721  *//*--------------------------------------------------------------------*/
 722 tcu::Sampler::CompareMode mapGLCompareFunc (deUint32 mode)
 723 {
 724         switch (mode)
 725         {
 726                 case GL_LESS:           return tcu::Sampler::COMPAREMODE_LESS;
 727                 case GL_LEQUAL:         return tcu::Sampler::COMPAREMODE_LESS_OR_EQUAL;
 728                 case GL_GREATER:        return tcu::Sampler::COMPAREMODE_GREATER;
 729                 case GL_GEQUAL:         return tcu::Sampler::COMPAREMODE_GREATER_OR_EQUAL;
 730                 case GL_EQUAL:          return tcu::Sampler::COMPAREMODE_EQUAL;
 731                 case GL_NOTEQUAL:       return tcu::Sampler::COMPAREMODE_NOT_EQUAL;
 732                 case GL_ALWAYS:         return tcu::Sampler::COMPAREMODE_ALWAYS;
 733                 case GL_NEVER:          return tcu::Sampler::COMPAREMODE_NEVER;
 734                 default:
 735                         throw tcu::InternalError("Can't map GL compare mode " + tcu::toHex(mode).toString());
 736         }
 737 }
 738
 739 /*--------------------------------------------------------------------*//*!
 740  * \brief Get GL wrap mode.
 741  *
 742  * If no mapping is found, throws tcu::InternalError.
 743  *
 744  * \param wrapMode Wrap mode
 745  * \return GL wrap mode
 746  *//*--------------------------------------------------------------------*/
 747 deUint32 getGLWrapMode (tcu::Sampler::WrapMode wrapMode)
 748 {
 749         DE_ASSERT(wrapMode != tcu::Sampler::WRAPMODE_LAST);
 750         switch (wrapMode)
 751         {
 752                 case tcu::Sampler::CLAMP_TO_EDGE:               return GL_CLAMP_TO_EDGE;
 753                 case tcu::Sampler::CLAMP_TO_BORDER:             return GL_CLAMP_TO_BORDER;
 754                 case tcu::Sampler::REPEAT_GL:                   return GL_REPEAT;
 755                 case tcu::Sampler::MIRRORED_REPEAT_GL:  return GL_MIRRORED_REPEAT;
 756                 default:
 757                         throw tcu::InternalError("Can't map wrap mode");
 758         }
 759 }
 760
 761 /*--------------------------------------------------------------------*//*!
 762  * \brief Get GL filter mode.
 763  *
 764  * If no mapping is found, throws tcu::InternalError.
 765  *
 766  * \param filterMode Filter mode
 767  * \return GL filter mode
 768  *//*--------------------------------------------------------------------*/
 769 deUint32 getGLFilterMode (tcu::Sampler::FilterMode filterMode)
 770 {
 771         DE_ASSERT(filterMode != tcu::Sampler::FILTERMODE_LAST);
 772         switch (filterMode)
 773         {
 774                 case tcu::Sampler::NEAREST:                                     return GL_NEAREST;
 775                 case tcu::Sampler::LINEAR:                                      return GL_LINEAR;
 776                 case tcu::Sampler::NEAREST_MIPMAP_NEAREST:      return GL_NEAREST_MIPMAP_NEAREST;
 777                 case tcu::Sampler::NEAREST_MIPMAP_LINEAR:       return GL_NEAREST_MIPMAP_LINEAR;
 778                 case tcu::Sampler::LINEAR_MIPMAP_NEAREST:       return GL_LINEAR_MIPMAP_NEAREST;
 779                 case tcu::Sampler::LINEAR_MIPMAP_LINEAR:        return GL_LINEAR_MIPMAP_LINEAR;
 780                 default:
 781                         throw tcu::InternalError("Can't map filter mode");
 782         }
 783 }
 784
 785 /*--------------------------------------------------------------------*//*!
 786  * \brief Get GL compare mode.
 787  *
 788  * If no mapping is found, throws tcu::InternalError.
 789  *
 790  * \param compareMode Compare mode
 791  * \return GL compare mode
 792  *//*--------------------------------------------------------------------*/
 793 deUint32 getGLCompareFunc (tcu::Sampler::CompareMode compareMode)
 794 {
 795         DE_ASSERT(compareMode != tcu::Sampler::COMPAREMODE_NONE);
 796         switch (compareMode)
 797         {
 798                 case tcu::Sampler::COMPAREMODE_NONE:                            return GL_NONE;
 799                 case tcu::Sampler::COMPAREMODE_LESS:                            return GL_LESS;
 800                 case tcu::Sampler::COMPAREMODE_LESS_OR_EQUAL:           return GL_LEQUAL;
 801                 case tcu::Sampler::COMPAREMODE_GREATER:                         return GL_GREATER;
 802                 case tcu::Sampler::COMPAREMODE_GREATER_OR_EQUAL:        return GL_GEQUAL;
 803                 case tcu::Sampler::COMPAREMODE_EQUAL:                           return GL_EQUAL;
 804                 case tcu::Sampler::COMPAREMODE_NOT_EQUAL:                       return GL_NOTEQUAL;
 805                 case tcu::Sampler::COMPAREMODE_ALWAYS:                          return GL_ALWAYS;
 806                 case tcu::Sampler::COMPAREMODE_NEVER:                           return GL_NEVER;
 807                 default:
 808                         throw tcu::InternalError("Can't map compare mode");
 809         }
 810 }
 811
 812 /*--------------------------------------------------------------------*//*!
 813  * \brief Get GL cube face.
 814  *
 815  * If no mapping is found, throws tcu::InternalError.
 816  *
 817  * \param face Cube face
 818  * \return GL cube face
 819  *//*--------------------------------------------------------------------*/
 820 deUint32 getGLCubeFace (tcu::CubeFace face)
 821 {
 822         DE_ASSERT(face != tcu::CUBEFACE_LAST);
 823         switch (face)
 824         {
 825                 case tcu::CUBEFACE_NEGATIVE_X:  return GL_TEXTURE_CUBE_MAP_NEGATIVE_X;
 826                 case tcu::CUBEFACE_POSITIVE_X:  return GL_TEXTURE_CUBE_MAP_POSITIVE_X;
 827                 case tcu::CUBEFACE_NEGATIVE_Y:  return GL_TEXTURE_CUBE_MAP_NEGATIVE_Y;
 828                 case tcu::CUBEFACE_POSITIVE_Y:  return GL_TEXTURE_CUBE_MAP_POSITIVE_Y;
 829                 case tcu::CUBEFACE_NEGATIVE_Z:  return GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;
 830                 case tcu::CUBEFACE_POSITIVE_Z:  return GL_TEXTURE_CUBE_MAP_POSITIVE_Z;
 831                 default:
 832                         throw tcu::InternalError("Can't map cube face");
 833         }
 834 }
 835
 836 tcu::CubeFace getCubeFaceFromGL (deUint32 face)
 837 {
 838         switch (face)
 839         {
 840                 case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:    return tcu::CUBEFACE_NEGATIVE_X;
 841                 case GL_TEXTURE_CUBE_MAP_POSITIVE_X:    return tcu::CUBEFACE_POSITIVE_X;
 842                 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:    return tcu::CUBEFACE_NEGATIVE_Y;
 843                 case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:    return tcu::CUBEFACE_POSITIVE_Y;
 844                 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:    return tcu::CUBEFACE_NEGATIVE_Z;
 845                 case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:    return tcu::CUBEFACE_POSITIVE_Z;
 846                 default:
 847                         throw tcu::InternalError("Can't map cube face");
 848         }
 849 }
 850
 851 /*--------------------------------------------------------------------*//*!
 852  * \brief Get GLSL sampler type for texture format.
 853  *
 854  * If no mapping is found, glu::TYPE_LAST is returned.
 855  *
 856  * \param format Texture format
 857  * \return GLSL 1D sampler type for format
 858  *//*--------------------------------------------------------------------*/
 859 DataType getSampler1DType (tcu::TextureFormat format)
 860 {
 861         using tcu::TextureFormat;
 862
 863         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
 864                 return TYPE_SAMPLER_1D;
 865
 866         if (format.order == TextureFormat::S)
 867                 return TYPE_LAST;
 868
 869         switch (tcu::getTextureChannelClass(format.type))
 870         {
 871                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
 872                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
 873                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
 874                         return glu::TYPE_SAMPLER_1D;
 875
 876                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
 877                         return glu::TYPE_INT_SAMPLER_1D;
 878
 879                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
 880                         return glu::TYPE_UINT_SAMPLER_1D;
 881
 882                 default:
 883                         return glu::TYPE_LAST;
 884         }
 885 }
 886
 887 /*--------------------------------------------------------------------*//*!
 888  * \brief Get GLSL sampler type for texture format.
 889  *
 890  * If no mapping is found, glu::TYPE_LAST is returned.
 891  *
 892  * \param format Texture format
 893  * \return GLSL 2D sampler type for format
 894  *//*--------------------------------------------------------------------*/
 895 DataType getSampler2DType (tcu::TextureFormat format)
 896 {
 897         using tcu::TextureFormat;
 898
 899         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
 900                 return TYPE_SAMPLER_2D;
 901
 902         if (format.order == TextureFormat::S)
 903                 return TYPE_LAST;
 904
 905         switch (tcu::getTextureChannelClass(format.type))
 906         {
 907                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
 908                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
 909                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
 910                         return glu::TYPE_SAMPLER_2D;
 911
 912                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
 913                         return glu::TYPE_INT_SAMPLER_2D;
 914
 915                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
 916                         return glu::TYPE_UINT_SAMPLER_2D;
 917
 918                 default:
 919                         return glu::TYPE_LAST;
 920         }
 921 }
 922
 923 /*--------------------------------------------------------------------*//*!
 924  * \brief Get GLSL sampler type for texture format.
 925  *
 926  * If no mapping is found, glu::TYPE_LAST is returned.
 927  *
 928  * \param format Texture format
 929  * \return GLSL cube map sampler type for format
 930  *//*--------------------------------------------------------------------*/
 931 DataType getSamplerCubeType (tcu::TextureFormat format)
 932 {
 933         using tcu::TextureFormat;
 934
 935         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
 936                 return TYPE_SAMPLER_CUBE;
 937
 938         if (format.order == TextureFormat::S)
 939                 return TYPE_LAST;
 940
 941         switch (tcu::getTextureChannelClass(format.type))
 942         {
 943                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
 944                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
 945                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
 946                         return glu::TYPE_SAMPLER_CUBE;
 947
 948                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
 949                         return glu::TYPE_INT_SAMPLER_CUBE;
 950
 951                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
 952                         return glu::TYPE_UINT_SAMPLER_CUBE;
 953
 954                 default:
 955                         return glu::TYPE_LAST;
 956         }
 957 }
 958
 959 /*--------------------------------------------------------------------*//*!
 960  * \brief Get GLSL sampler type for texture format.
 961  *
 962  * If no mapping is found, glu::TYPE_LAST is returned.
 963  *
 964  * \param format Texture format
 965  * \return GLSL 1D array sampler type for format
 966  *//*--------------------------------------------------------------------*/
 967 DataType getSampler1DArrayType (tcu::TextureFormat format)
 968 {
 969         using tcu::TextureFormat;
 970
 971         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
 972                 return TYPE_SAMPLER_1D_ARRAY;
 973
 974         if (format.order == TextureFormat::S)
 975                 return TYPE_LAST;
 976
 977         switch (tcu::getTextureChannelClass(format.type))
 978         {
 979                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
 980                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
 981                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
 982                         return glu::TYPE_SAMPLER_1D_ARRAY;
 983
 984                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
 985                         return glu::TYPE_INT_SAMPLER_1D_ARRAY;
 986
 987                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
 988                         return glu::TYPE_UINT_SAMPLER_1D_ARRAY;
 989
 990                 default:
 991                         return glu::TYPE_LAST;
 992         }
 993 }
 994
 995 /*--------------------------------------------------------------------*//*!
 996  * \brief Get GLSL sampler type for texture format.
 997  *
 998  * If no mapping is found, glu::TYPE_LAST is returned.
 999  *
1000  * \param format Texture format
1001  * \return GLSL 2D array sampler type for format
1002  *//*--------------------------------------------------------------------*/
1003 DataType getSampler2DArrayType (tcu::TextureFormat format)
1004 {
1005         using tcu::TextureFormat;
1006
1007         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
1008                 return TYPE_SAMPLER_2D_ARRAY;
1009
1010         if (format.order == TextureFormat::S)
1011                 return TYPE_LAST;
1012
1013         switch (tcu::getTextureChannelClass(format.type))
1014         {
1015                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
1016                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
1017                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
1018                         return glu::TYPE_SAMPLER_2D_ARRAY;
1019
1020                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
1021                         return glu::TYPE_INT_SAMPLER_2D_ARRAY;
1022
1023                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
1024                         return glu::TYPE_UINT_SAMPLER_2D_ARRAY;
1025
1026                 default:
1027                         return glu::TYPE_LAST;
1028         }
1029 }
1030
1031 /*--------------------------------------------------------------------*//*!
1032  * \brief Get GLSL sampler type for texture format.
1033  *
1034  * If no mapping is found, glu::TYPE_LAST is returned.
1035  *
1036  * \param format Texture format
1037  * \return GLSL 3D sampler type for format
1038  *//*--------------------------------------------------------------------*/
1039 DataType getSampler3DType (tcu::TextureFormat format)
1040 {
1041         using tcu::TextureFormat;
1042
1043         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
1044                 return TYPE_SAMPLER_3D;
1045
1046         if (format.order == TextureFormat::S)
1047                 return TYPE_LAST;
1048
1049         switch (tcu::getTextureChannelClass(format.type))
1050         {
1051                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
1052                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
1053                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
1054                         return glu::TYPE_SAMPLER_3D;
1055
1056                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
1057                         return glu::TYPE_INT_SAMPLER_3D;
1058
1059                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
1060                         return glu::TYPE_UINT_SAMPLER_3D;
1061
1062                 default:
1063                         return glu::TYPE_LAST;
1064         }
1065 }
1066
1067 /*--------------------------------------------------------------------*//*!
1068  * \brief Get GLSL sampler type for texture format.
1069  *
1070  * If no mapping is found, glu::TYPE_LAST is returned.
1071  *
1072  * \param format Texture format
1073  * \return GLSL cube map array sampler type for format
1074  *//*--------------------------------------------------------------------*/
1075 DataType getSamplerCubeArrayType (tcu::TextureFormat format)
1076 {
1077         using tcu::TextureFormat;
1078
1079         if (format.order == TextureFormat::D || format.order == TextureFormat::DS)
1080                 return TYPE_SAMPLER_CUBE_ARRAY;
1081
1082         if (format.order == TextureFormat::S)
1083                 return TYPE_LAST;
1084
1085         switch (tcu::getTextureChannelClass(format.type))
1086         {
1087                 case tcu::TEXTURECHANNELCLASS_FLOATING_POINT:
1088                 case tcu::TEXTURECHANNELCLASS_SIGNED_FIXED_POINT:
1089                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_FIXED_POINT:
1090                         return glu::TYPE_SAMPLER_CUBE_ARRAY;
1091
1092                 case tcu::TEXTURECHANNELCLASS_SIGNED_INTEGER:
1093                         return glu::TYPE_INT_SAMPLER_CUBE_ARRAY;
1094
1095                 case tcu::TEXTURECHANNELCLASS_UNSIGNED_INTEGER:
1096                         return glu::TYPE_UINT_SAMPLER_CUBE_ARRAY;
1097
1098                 default:
1099                         return glu::TYPE_LAST;
1100         }
1101 }
1102
1103 enum RenderableType
1104 {
1105         RENDERABLE_COLOR        = (1<<0),
1106         RENDERABLE_DEPTH        = (1<<1),
1107         RENDERABLE_STENCIL      = (1<<2)
1108 };
1109
1110 static deUint32 getRenderableBitsES3 (const ContextInfo& contextInfo, deUint32 internalFormat)
1111 {
1112         switch (internalFormat)
1113         {
1114                 // Color-renderable formats
1115                 case GL_RGBA32I:
1116                 case GL_RGBA32UI:
1117                 case GL_RGBA16I:
1118                 case GL_RGBA16UI:
1119                 case GL_RGBA8:
1120                 case GL_RGBA8I:
1121                 case GL_RGBA8UI:
1122                 case GL_SRGB8_ALPHA8:
1123                 case GL_RGB10_A2:
1124                 case GL_RGB10_A2UI:
1125                 case GL_RGBA4:
1126                 case GL_RGB5_A1:
1127                 case GL_RGB8:
1128                 case GL_RGB565:
1129                 case GL_RG32I:
1130                 case GL_RG32UI:
1131                 case GL_RG16I:
1132                 case GL_RG16UI:
1133                 case GL_RG8:
1134                 case GL_RG8I:
1135                 case GL_RG8UI:
1136                 case GL_R32I:
1137                 case GL_R32UI:
1138                 case GL_R16I:
1139                 case GL_R16UI:
1140                 case GL_R8:
1141                 case GL_R8I:
1142                 case GL_R8UI:
1143                         return RENDERABLE_COLOR;
1144
1145                 // GL_EXT_color_buffer_float
1146                 case GL_RGBA32F:
1147                 case GL_R11F_G11F_B10F:
1148                 case GL_RG32F:
1149                 case GL_R32F:
1150                         if (contextInfo.isExtensionSupported("GL_EXT_color_buffer_float"))
1151                                 return RENDERABLE_COLOR;
1152                         else
1153                                 return 0;
1154
1155                 // GL_EXT_color_buffer_float / GL_EXT_color_buffer_half_float
1156                 case GL_RGBA16F:
1157                 case GL_RG16F:
1158                 case GL_R16F:
1159                         if (contextInfo.isExtensionSupported("GL_EXT_color_buffer_float") ||
1160                                 contextInfo.isExtensionSupported("GL_EXT_color_buffer_half_float"))
1161                                 return RENDERABLE_COLOR;
1162                         else
1163                                 return 0;
1164
1165                 // Depth formats
1166                 case GL_DEPTH_COMPONENT32F:
1167                 case GL_DEPTH_COMPONENT24:
1168                 case GL_DEPTH_COMPONENT16:
1169                         return RENDERABLE_DEPTH;
1170
1171                 // Depth+stencil formats
1172                 case GL_DEPTH32F_STENCIL8:
1173                 case GL_DEPTH24_STENCIL8:
1174                         return RENDERABLE_DEPTH|RENDERABLE_STENCIL;
1175
1176                 // Stencil formats
1177                 case GL_STENCIL_INDEX8:
1178                         return RENDERABLE_STENCIL;
1179
1180                 default:
1181                         return 0;
1182         }
1183 }
1184
1185 /*--------------------------------------------------------------------*//*!
1186  * \brief Check if sized internal format is color-renderable.
1187  * \note Works currently only on ES3 context.
1188  *//*--------------------------------------------------------------------*/
1189 bool isSizedFormatColorRenderable (const RenderContext& renderCtx, const ContextInfo& contextInfo, deUint32 sizedFormat)
1190 {
1191         deUint32 renderable = 0;
1192
1193         if (renderCtx.getType().getAPI() == ApiType::es(3,0))
1194                 renderable = getRenderableBitsES3(contextInfo, sizedFormat);
1195         else
1196                 throw tcu::InternalError("Context type not supported in query");
1197
1198         return (renderable & RENDERABLE_COLOR) != 0;
1199 }
1200
1201 const tcu::IVec2 (&getDefaultGatherOffsets (void))[4]
1202 {
1203         static const tcu::IVec2 s_defaultOffsets[4] =
1204         {
1205                 tcu::IVec2(0, 1),
1206                 tcu::IVec2(1, 1),
1207                 tcu::IVec2(1, 0),
1208                 tcu::IVec2(0, 0),
1209         };
1210         return s_defaultOffsets;
1211 }
1212
1213 tcu::PixelBufferAccess getTextureBufferEffectiveRefTexture (TextureBuffer& buffer, int maxTextureBufferSize)
1214 {
1215         DE_ASSERT(maxTextureBufferSize > 0);
1216
1217         const tcu::PixelBufferAccess& fullAccess = buffer.getFullRefTexture();
1218
1219         return tcu::PixelBufferAccess(fullAccess.getFormat(),
1220                                                                   tcu::IVec3(de::min(fullAccess.getWidth(), maxTextureBufferSize), 1, 1),
1221                                                                   fullAccess.getPitch(),
1222                                                                   fullAccess.getDataPtr());
1223 }
1224
1225 tcu::ConstPixelBufferAccess getTextureBufferEffectiveRefTexture (const TextureBuffer& buffer, int maxTextureBufferSize)
1226 {
1227         return getTextureBufferEffectiveRefTexture(const_cast<TextureBuffer&>(buffer), maxTextureBufferSize);
1228 }
1229
1230 } // glu