src/mesa/main/textureview.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2013 LunarG, Inc.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Courtney Goeltzenleuchter <courtney@lunarg.com>
  26  */
  27
  28
  29 /**
  30  * \file textureview.c
  31  * GL_ARB_texture_view functions
  32  */
  33
  34 #include "glheader.h"
  35 #include "context.h"
  36 #include "enums.h"
  37 #include "imports.h"
  38 #include "macros.h"
  39 #include "teximage.h"
  40 #include "texobj.h"
  41 #include "mipmap.h"
  42 #include "texstorage.h"
  43 #include "textureview.h"
  44 #include "stdbool.h"
  45 #include "mtypes.h"
  46
  47 /* Table 3.X.2 (Compatible internal formats for TextureView)
  48     ---------------------------------------------------------------------------
  49     | Class                 | Internal formats                                |
  50     ---------------------------------------------------------------------------
  51     | VIEW_CLASS_128_BITS   | RGBA32F, RGBA32UI, RGBA32I                      |
  52     ---------------------------------------------------------------------------
  53     | VIEW_CLASS_96_BITS    | RGB32F, RGB32UI, RGB32I                         |
  54     ---------------------------------------------------------------------------
  55     | VIEW_CLASS_64_BITS    | RGBA16F, RG32F, RGBA16UI, RG32UI, RGBA16I,      |
  56     |                       | RG32I, RGBA16, RGBA16_SNORM                     |
  57     ---------------------------------------------------------------------------
  58     | VIEW_CLASS_48_BITS    | RGB16, RGB16_SNORM, RGB16F, RGB16UI, RGB16I     |
  59     ---------------------------------------------------------------------------
  60     | VIEW_CLASS_32_BITS    | RG16F, R11F_G11F_B10F, R32F,                    |
  61     |                       | RGB10_A2UI, RGBA8UI, RG16UI, R32UI,             |
  62     |                       | RGBA8I, RG16I, R32I, RGB10_A2, RGBA8, RG16,     |
  63     |                       | RGBA8_SNORM, RG16_SNORM, SRGB8_ALPHA8, RGB9_E5  |
  64     ---------------------------------------------------------------------------
  65     | VIEW_CLASS_24_BITS    | RGB8, RGB8_SNORM, SRGB8, RGB8UI, RGB8I          |
  66     ---------------------------------------------------------------------------
  67     | VIEW_CLASS_16_BITS    | R16F, RG8UI, R16UI, RG8I, R16I, RG8, R16,       |
  68     |                       | RG8_SNORM, R16_SNORM                            |
  69     ---------------------------------------------------------------------------
  70     | VIEW_CLASS_8_BITS     | R8UI, R8I, R8, R8_SNORM                         |
  71     ---------------------------------------------------------------------------
  72     | VIEW_CLASS_RGTC1_RED  | COMPRESSED_RED_RGTC1,                           |
  73     |                       | COMPRESSED_SIGNED_RED_RGTC1                     |
  74     ---------------------------------------------------------------------------
  75     | VIEW_CLASS_RGTC2_RG   | COMPRESSED_RG_RGTC2,                            |
  76     |                       | COMPRESSED_SIGNED_RG_RGTC2                      |
  77     ---------------------------------------------------------------------------
  78     | VIEW_CLASS_BPTC_UNORM | COMPRESSED_RGBA_BPTC_UNORM,                     |
  79     |                       | COMPRESSED_SRGB_ALPHA_BPTC_UNORM                |
  80     ---------------------------------------------------------------------------
  81     | VIEW_CLASS_BPTC_FLOAT | COMPRESSED_RGB_BPTC_SIGNED_FLOAT,               |
  82     |                       | COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT              |
  83     ---------------------------------------------------------------------------
  84  */
  85
  86 #define VIEW_CLASS_GLES(x)             (GL_VIEW_CLASS_BPTC_FLOAT + 1 + x)
  87 #define VIEW_CLASS_EAC_R11             VIEW_CLASS_GLES(0)
  88 #define VIEW_CLASS_EAC_RG11            VIEW_CLASS_GLES(1)
  89 #define VIEW_CLASS_ETC2_RGB            VIEW_CLASS_GLES(2)
  90 #define VIEW_CLASS_ETC2_RGBA           VIEW_CLASS_GLES(3)
  91 #define VIEW_CLASS_ETC2_EAC_RGBA       VIEW_CLASS_GLES(4)
  92 #define VIEW_CLASS_ASTC_4x4_RGBA       VIEW_CLASS_GLES(5)
  93 #define VIEW_CLASS_ASTC_5x4_RGBA       VIEW_CLASS_GLES(6)
  94 #define VIEW_CLASS_ASTC_5x5_RGBA       VIEW_CLASS_GLES(7)
  95 #define VIEW_CLASS_ASTC_6x5_RGBA       VIEW_CLASS_GLES(8)
  96 #define VIEW_CLASS_ASTC_6x6_RGBA       VIEW_CLASS_GLES(9)
  97 #define VIEW_CLASS_ASTC_8x5_RGBA       VIEW_CLASS_GLES(10)
  98 #define VIEW_CLASS_ASTC_8x6_RGBA       VIEW_CLASS_GLES(11)
  99 #define VIEW_CLASS_ASTC_8x8_RGBA       VIEW_CLASS_GLES(12)
 100 #define VIEW_CLASS_ASTC_10x5_RGBA      VIEW_CLASS_GLES(13)
 101 #define VIEW_CLASS_ASTC_10x6_RGBA      VIEW_CLASS_GLES(14)
 102 #define VIEW_CLASS_ASTC_10x8_RGBA      VIEW_CLASS_GLES(15)
 103 #define VIEW_CLASS_ASTC_10x10_RGBA     VIEW_CLASS_GLES(16)
 104 #define VIEW_CLASS_ASTC_12x10_RGBA     VIEW_CLASS_GLES(17)
 105 #define VIEW_CLASS_ASTC_12x12_RGBA     VIEW_CLASS_GLES(18)
 106 #define VIEW_CLASS_ASTC_3x3x3_RGBA     VIEW_CLASS_GLES(19)
 107 #define VIEW_CLASS_ASTC_4x3x3_RGBA     VIEW_CLASS_GLES(20)
 108 #define VIEW_CLASS_ASTC_4x4x3_RGBA     VIEW_CLASS_GLES(21)
 109 #define VIEW_CLASS_ASTC_4x4x4_RGBA     VIEW_CLASS_GLES(22)
 110 #define VIEW_CLASS_ASTC_5x4x4_RGBA     VIEW_CLASS_GLES(23)
 111 #define VIEW_CLASS_ASTC_5x5x4_RGBA     VIEW_CLASS_GLES(24)
 112 #define VIEW_CLASS_ASTC_5x5x5_RGBA     VIEW_CLASS_GLES(25)
 113 #define VIEW_CLASS_ASTC_6x5x5_RGBA     VIEW_CLASS_GLES(26)
 114 #define VIEW_CLASS_ASTC_6x6x5_RGBA     VIEW_CLASS_GLES(27)
 115 #define VIEW_CLASS_ASTC_6x6x6_RGBA     VIEW_CLASS_GLES(28)
 116
 117
 118 struct internal_format_class_info {
 119    GLenum view_class;
 120    GLenum internal_format;
 121 };
 122 static const struct internal_format_class_info compatible_internal_formats[] = {
 123    {GL_VIEW_CLASS_128_BITS, GL_RGBA32F},
 124    {GL_VIEW_CLASS_128_BITS, GL_RGBA32UI},
 125    {GL_VIEW_CLASS_128_BITS, GL_RGBA32I},
 126    {GL_VIEW_CLASS_96_BITS, GL_RGB32F},
 127    {GL_VIEW_CLASS_96_BITS, GL_RGB32UI},
 128    {GL_VIEW_CLASS_96_BITS, GL_RGB32I},
 129    {GL_VIEW_CLASS_64_BITS, GL_RGBA16F},
 130    {GL_VIEW_CLASS_64_BITS, GL_RG32F},
 131    {GL_VIEW_CLASS_64_BITS, GL_RGBA16UI},
 132    {GL_VIEW_CLASS_64_BITS, GL_RG32UI},
 133    {GL_VIEW_CLASS_64_BITS, GL_RGBA16I},
 134    {GL_VIEW_CLASS_64_BITS, GL_RG32I},
 135    {GL_VIEW_CLASS_64_BITS, GL_RGBA16},
 136    {GL_VIEW_CLASS_64_BITS, GL_RGBA16_SNORM},
 137    {GL_VIEW_CLASS_48_BITS, GL_RGB16},
 138    {GL_VIEW_CLASS_48_BITS, GL_RGB16_SNORM},
 139    {GL_VIEW_CLASS_48_BITS, GL_RGB16F},
 140    {GL_VIEW_CLASS_48_BITS, GL_RGB16UI},
 141    {GL_VIEW_CLASS_48_BITS, GL_RGB16I},
 142    {GL_VIEW_CLASS_32_BITS, GL_RG16F},
 143    {GL_VIEW_CLASS_32_BITS, GL_R11F_G11F_B10F},
 144    {GL_VIEW_CLASS_32_BITS, GL_R32F},
 145    {GL_VIEW_CLASS_32_BITS, GL_RGB10_A2UI},
 146    {GL_VIEW_CLASS_32_BITS, GL_RGBA8UI},
 147    {GL_VIEW_CLASS_32_BITS, GL_RG16UI},
 148    {GL_VIEW_CLASS_32_BITS, GL_R32UI},
 149    {GL_VIEW_CLASS_32_BITS, GL_RGBA8I},
 150    {GL_VIEW_CLASS_32_BITS, GL_RG16I},
 151    {GL_VIEW_CLASS_32_BITS, GL_R32I},
 152    {GL_VIEW_CLASS_32_BITS, GL_RGB10_A2},
 153    {GL_VIEW_CLASS_32_BITS, GL_RGBA8},
 154    {GL_VIEW_CLASS_32_BITS, GL_RG16},
 155    {GL_VIEW_CLASS_32_BITS, GL_RGBA8_SNORM},
 156    {GL_VIEW_CLASS_32_BITS, GL_RG16_SNORM},
 157    {GL_VIEW_CLASS_32_BITS, GL_SRGB8_ALPHA8},
 158    {GL_VIEW_CLASS_32_BITS, GL_RGB9_E5},
 159    {GL_VIEW_CLASS_24_BITS, GL_RGB8},
 160    {GL_VIEW_CLASS_24_BITS, GL_RGB8_SNORM},
 161    {GL_VIEW_CLASS_24_BITS, GL_SRGB8},
 162    {GL_VIEW_CLASS_24_BITS, GL_RGB8UI},
 163    {GL_VIEW_CLASS_24_BITS, GL_RGB8I},
 164    {GL_VIEW_CLASS_16_BITS, GL_R16F},
 165    {GL_VIEW_CLASS_16_BITS, GL_RG8UI},
 166    {GL_VIEW_CLASS_16_BITS, GL_R16UI},
 167    {GL_VIEW_CLASS_16_BITS, GL_RG8I},
 168    {GL_VIEW_CLASS_16_BITS, GL_R16I},
 169    {GL_VIEW_CLASS_16_BITS, GL_RG8},
 170    {GL_VIEW_CLASS_16_BITS, GL_R16},
 171    {GL_VIEW_CLASS_16_BITS, GL_RG8_SNORM},
 172    {GL_VIEW_CLASS_16_BITS, GL_R16_SNORM},
 173    {GL_VIEW_CLASS_8_BITS, GL_R8UI},
 174    {GL_VIEW_CLASS_8_BITS, GL_R8I},
 175    {GL_VIEW_CLASS_8_BITS, GL_R8},
 176    {GL_VIEW_CLASS_8_BITS, GL_R8_SNORM},
 177    {GL_VIEW_CLASS_RGTC1_RED, GL_COMPRESSED_RED_RGTC1},
 178    {GL_VIEW_CLASS_RGTC1_RED, GL_COMPRESSED_SIGNED_RED_RGTC1},
 179    {GL_VIEW_CLASS_RGTC2_RG, GL_COMPRESSED_RG_RGTC2},
 180    {GL_VIEW_CLASS_RGTC2_RG, GL_COMPRESSED_SIGNED_RG_RGTC2},
 181    {GL_VIEW_CLASS_BPTC_UNORM, GL_COMPRESSED_RGBA_BPTC_UNORM_ARB},
 182    {GL_VIEW_CLASS_BPTC_UNORM, GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_ARB},
 183    {GL_VIEW_CLASS_BPTC_FLOAT, GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_ARB},
 184    {GL_VIEW_CLASS_BPTC_FLOAT, GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_ARB},
 185 };
 186
 187 static const struct internal_format_class_info s3tc_compatible_internal_formats[] = {
 188    {GL_VIEW_CLASS_S3TC_DXT1_RGB, GL_COMPRESSED_RGB_S3TC_DXT1_EXT},
 189    {GL_VIEW_CLASS_S3TC_DXT1_RGB, GL_COMPRESSED_SRGB_S3TC_DXT1_EXT},
 190    {GL_VIEW_CLASS_S3TC_DXT1_RGBA, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT},
 191    {GL_VIEW_CLASS_S3TC_DXT1_RGBA, GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT},
 192    {GL_VIEW_CLASS_S3TC_DXT3_RGBA, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT},
 193    {GL_VIEW_CLASS_S3TC_DXT3_RGBA, GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT},
 194    {GL_VIEW_CLASS_S3TC_DXT5_RGBA, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT},
 195    {GL_VIEW_CLASS_S3TC_DXT5_RGBA, GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT},
 196 };
 197
 198 static const struct internal_format_class_info gles_etc2_compatible_internal_formats[] = {
 199    {VIEW_CLASS_EAC_R11, GL_COMPRESSED_R11_EAC},
 200    {VIEW_CLASS_EAC_R11, GL_COMPRESSED_SIGNED_R11_EAC},
 201    {VIEW_CLASS_EAC_RG11, GL_COMPRESSED_RG11_EAC},
 202    {VIEW_CLASS_EAC_RG11, GL_COMPRESSED_SIGNED_RG11_EAC},
 203    {VIEW_CLASS_ETC2_RGB, GL_COMPRESSED_RGB8_ETC2},
 204    {VIEW_CLASS_ETC2_RGB, GL_COMPRESSED_SRGB8_ETC2},
 205    {VIEW_CLASS_ETC2_RGBA, GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2},
 206    {VIEW_CLASS_ETC2_RGBA, GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2},
 207    {VIEW_CLASS_ETC2_EAC_RGBA, GL_COMPRESSED_RGBA8_ETC2_EAC},
 208    {VIEW_CLASS_ETC2_EAC_RGBA, GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC},
 209 };
 210
 211 static const struct internal_format_class_info gles_astc_compatible_internal_formats[] = {
 212 #define ASTC_FMT(size) \
 213    {VIEW_CLASS_ASTC_##size##_RGBA, GL_COMPRESSED_RGBA_ASTC_##size##_KHR}, \
 214    {VIEW_CLASS_ASTC_##size##_RGBA, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_##size##_KHR}
 215
 216    ASTC_FMT(4x4),
 217    ASTC_FMT(5x4),
 218    ASTC_FMT(5x5),
 219    ASTC_FMT(6x5),
 220    ASTC_FMT(6x6),
 221    ASTC_FMT(8x5),
 222    ASTC_FMT(8x6),
 223    ASTC_FMT(8x8),
 224    ASTC_FMT(10x5),
 225    ASTC_FMT(10x6),
 226    ASTC_FMT(10x8),
 227    ASTC_FMT(10x10),
 228    ASTC_FMT(12x10),
 229    ASTC_FMT(12x12),
 230 #undef ASTC_FMT
 231 };
 232
 233 static const struct internal_format_class_info gles_astc_3d_compatible_internal_formats[] = {
 234 #define ASTC_FMT(size) \
 235    {VIEW_CLASS_ASTC_##size##_RGBA, GL_COMPRESSED_RGBA_ASTC_##size##_OES}, \
 236    {VIEW_CLASS_ASTC_##size##_RGBA, GL_COMPRESSED_SRGB8_ALPHA8_ASTC_##size##_OES}
 237
 238    ASTC_FMT(3x3x3),
 239    ASTC_FMT(4x3x3),
 240    ASTC_FMT(4x4x3),
 241    ASTC_FMT(4x4x4),
 242    ASTC_FMT(5x4x4),
 243    ASTC_FMT(5x5x4),
 244    ASTC_FMT(5x5x5),
 245    ASTC_FMT(6x5x5),
 246    ASTC_FMT(6x6x5),
 247    ASTC_FMT(6x6x6),
 248 #undef ASTC_FMT
 249 };
 250
 251 GLenum
 252 _mesa_texture_view_lookup_view_class(const struct gl_context *ctx, GLenum internalformat)
 253 {
 254    GLuint i;
 255
 256    for (i = 0; i < ARRAY_SIZE(compatible_internal_formats); i++) {
 257       if (compatible_internal_formats[i].internal_format == internalformat)
 258          return compatible_internal_formats[i].view_class;
 259    }
 260
 261    if (ctx->Extensions.EXT_texture_compression_s3tc &&
 262        ctx->Extensions.EXT_texture_sRGB) {
 263       for (i = 0; i < ARRAY_SIZE(s3tc_compatible_internal_formats); i++) {
 264          if (s3tc_compatible_internal_formats[i].internal_format
 265              == internalformat)
 266             return s3tc_compatible_internal_formats[i].view_class;
 267       }
 268    }
 269
 270    if (_mesa_is_gles3(ctx)) {
 271       for (i = 0; i < ARRAY_SIZE(gles_etc2_compatible_internal_formats); i++) {
 272          if (gles_etc2_compatible_internal_formats[i].internal_format
 273              == internalformat)
 274             return gles_etc2_compatible_internal_formats[i].view_class;
 275       }
 276
 277       if (ctx->Extensions.KHR_texture_compression_astc_ldr) {
 278          for (i = 0; i < ARRAY_SIZE(gles_astc_compatible_internal_formats); i++) {
 279             if (gles_astc_compatible_internal_formats[i].internal_format
 280                 == internalformat)
 281                return gles_astc_compatible_internal_formats[i].view_class;
 282          }
 283       }
 284
 285       if (ctx->Extensions.OES_texture_compression_astc) {
 286          for (i = 0; i < ARRAY_SIZE(gles_astc_3d_compatible_internal_formats); i++) {
 287             if (gles_astc_3d_compatible_internal_formats[i].internal_format
 288                 == internalformat)
 289                return gles_astc_3d_compatible_internal_formats[i].view_class;
 290          }
 291       }
 292    }
 293    return GL_FALSE;
 294 }
 295
 296 /**
 297  * Initialize new texture's gl_texture_image structures. Will not call driver
 298  * to allocate new space, simply record relevant layer, face, format, etc.
 299  * \return GL_FALSE if any error, GL_TRUE otherwise.
 300  */
 301 static GLboolean
 302 initialize_texture_fields(struct gl_context *ctx,
 303                           GLenum target,
 304                           struct gl_texture_object *texObj,
 305                           GLint levels,
 306                           GLsizei width, GLsizei height, GLsizei depth,
 307                           GLenum internalFormat, mesa_format texFormat,
 308                           GLuint numSamples, GLboolean fixedSampleLocations)
 309 {
 310    const GLuint numFaces = _mesa_num_tex_faces(target);
 311    GLint level, levelWidth = width, levelHeight = height, levelDepth = depth;
 312    GLuint face;
 313
 314    /* Pretend we are bound to initialize the gl_texture_image structs */
 315    texObj->Target = target;
 316
 317    /* Set up all the texture object's gl_texture_images */
 318    for (level = 0; level < levels; level++) {
 319       for (face = 0; face < numFaces; face++) {
 320          struct gl_texture_image *texImage;
 321          const GLenum faceTarget = _mesa_cube_face_target(target, face);
 322
 323          texImage = _mesa_get_tex_image(ctx, texObj, faceTarget, level);
 324
 325          if (!texImage) {
 326             _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexStorage");
 327             return GL_FALSE;
 328          }
 329
 330          _mesa_init_teximage_fields_ms(ctx, texImage,
 331                                     levelWidth, levelHeight, levelDepth,
 332                                     0, internalFormat, texFormat,
 333                                     numSamples, fixedSampleLocations);
 334       }
 335
 336       _mesa_next_mipmap_level_size(target, 0,
 337                                    levelWidth, levelHeight, levelDepth,
 338                                    &levelWidth, &levelHeight, &levelDepth);
 339    }
 340
 341    /* "unbind" */
 342    texObj->Target = 0;
 343
 344    return GL_TRUE;
 345 }
 346
 347 #define RETURN_IF_SUPPORTED(t) do {             \
 348    if (newTarget == GL_ ## t)                   \
 349       return true;                              \
 350 } while (0)
 351
 352 /**
 353  * Check for compatible target
 354  * If an error is found, record it with _mesa_error()
 355  * \return false if any error, true otherwise.
 356  */
 357 static bool
 358 target_valid(struct gl_context *ctx, GLenum origTarget, GLenum newTarget)
 359 {
 360    /*
 361     * From ARB_texture_view spec:
 362    ---------------------------------------------------------------------------------------------------------
 363    | Original target              | Valid new targets |
 364    ---------------------------------------------------------------------------------------------------------
 365    | TEXTURE_1D                   | TEXTURE_1D, TEXTURE_1D_ARRAY |
 366    | ------------------------------------------------------------------------------------------------------- |
 367    | TEXTURE_2D                   | TEXTURE_2D, TEXTURE_2D_ARRAY |
 368    | ------------------------------------------------------------------------------------------------------- |
 369    | TEXTURE_3D                   | TEXTURE_3D |
 370    | ------------------------------------------------------------------------------------------------------- |
 371    | TEXTURE_CUBE_MAP             | TEXTURE_CUBE_MAP, TEXTURE_2D, TEXTURE_2D_ARRAY, TEXTURE_CUBE_MAP_ARRAY |
 372    | ------------------------------------------------------------------------------------------------------- |
 373    | TEXTURE_RECTANGLE            | TEXTURE_RECTANGLE |
 374    | ------------------------------------------------------------------------------------------------------- |
 375    | TEXTURE_BUFFER               | <none> |
 376    | ------------------------------------------------------------------------------------------------------- |
 377    | TEXTURE_1D_ARRAY             | TEXTURE_1D_ARRAY, TEXTURE_1D |
 378    | ------------------------------------------------------------------------------------------------------- |
 379    | TEXTURE_2D_ARRAY             | TEXTURE_2D_ARRAY, TEXTURE_2D, TEXTURE_CUBE_MAP, TEXTURE_CUBE_MAP_ARRAY |
 380    | ------------------------------------------------------------------------------------------------------- |
 381    | TEXTURE_CUBE_MAP_ARRAY       | TEXTURE_CUBE_MAP_ARRAY, TEXTURE_2D_ARRAY, TEXTURE_2D, TEXTURE_CUBE_MAP |
 382    | ------------------------------------------------------------------------------------------------------- |
 383    | TEXTURE_2D_MULTISAMPLE       | TEXTURE_2D_MULTISAMPLE, TEXTURE_2D_MULTISAMPLE_ARRAY |
 384    | ------------------------------------------------------------------------------------------------------- |
 385    | TEXTURE_2D_MULTISAMPLE_ARRAY | TEXTURE_2D_MULTISAMPLE, TEXTURE_2D_MULTISAMPLE_ARRAY |
 386    ---------------------------------------------------------------------------------------------------------
 387     */
 388
 389    switch (origTarget) {
 390    case GL_TEXTURE_1D:
 391    case GL_TEXTURE_1D_ARRAY:
 392       RETURN_IF_SUPPORTED(TEXTURE_1D);
 393       RETURN_IF_SUPPORTED(TEXTURE_1D_ARRAY);
 394       break;
 395    case GL_TEXTURE_2D:
 396       RETURN_IF_SUPPORTED(TEXTURE_2D);
 397       RETURN_IF_SUPPORTED(TEXTURE_2D_ARRAY);
 398       break;
 399    case GL_TEXTURE_3D:
 400       RETURN_IF_SUPPORTED(TEXTURE_3D);
 401       break;
 402    case GL_TEXTURE_RECTANGLE:
 403       RETURN_IF_SUPPORTED(TEXTURE_RECTANGLE);
 404       break;
 405    case GL_TEXTURE_CUBE_MAP:
 406    case GL_TEXTURE_2D_ARRAY:
 407    case GL_TEXTURE_CUBE_MAP_ARRAY:
 408       RETURN_IF_SUPPORTED(TEXTURE_2D);
 409       RETURN_IF_SUPPORTED(TEXTURE_2D_ARRAY);
 410       RETURN_IF_SUPPORTED(TEXTURE_CUBE_MAP);
 411       RETURN_IF_SUPPORTED(TEXTURE_CUBE_MAP_ARRAY);
 412       break;
 413    case GL_TEXTURE_2D_MULTISAMPLE:
 414    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
 415       RETURN_IF_SUPPORTED(TEXTURE_2D_MULTISAMPLE);
 416       RETURN_IF_SUPPORTED(TEXTURE_2D_MULTISAMPLE_ARRAY);
 417       break;
 418    }
 419    _mesa_error(ctx, GL_INVALID_OPERATION,
 420                "glTextureView(illegal target=%s)",
 421                _mesa_enum_to_string(newTarget));
 422    return false;
 423 }
 424 #undef RETURN_IF_SUPPORTED
 425
 426 /**
 427  * Check for compatible format
 428  * If an error is found, record it with _mesa_error()
 429  * \return false if any error, true otherwise.
 430  */
 431 bool
 432 _mesa_texture_view_compatible_format(const struct gl_context *ctx,
 433                                      GLenum origInternalFormat,
 434                                      GLenum newInternalFormat)
 435 {
 436    unsigned int origViewClass, newViewClass;
 437
 438    /* The two textures' internal formats must be compatible according to
 439     * Table 3.X.2 (Compatible internal formats for TextureView)
 440     * if the internal format exists in that table the view class must match.
 441     * The internal formats must be identical if not in that table,
 442     * or an INVALID_OPERATION error is generated.
 443     */
 444    if (origInternalFormat == newInternalFormat)
 445       return true;
 446
 447    origViewClass = _mesa_texture_view_lookup_view_class(ctx, origInternalFormat);
 448    newViewClass = _mesa_texture_view_lookup_view_class(ctx, newInternalFormat);
 449    if ((origViewClass == newViewClass) && origViewClass != false)
 450       return true;
 451
 452    return false;
 453 }
 454
 455 /**
 456  * Helper function for TexStorage and teximagemultisample to set immutable
 457  * texture state needed by ARB_texture_view.
 458  */
 459 void
 460 _mesa_set_texture_view_state(struct gl_context *ctx,
 461                              struct gl_texture_object *texObj,
 462                              GLenum target, GLuint levels)
 463 {
 464    struct gl_texture_image *texImage;
 465
 466    /* Get a reference to what will become this View's base level */
 467    texImage = _mesa_select_tex_image(texObj, target, 0);
 468
 469    /* When an immutable texture is created via glTexStorage or
 470     * glTexImageMultisample,
 471     * TEXTURE_IMMUTABLE_FORMAT becomes TRUE.
 472     * TEXTURE_IMMUTABLE_LEVELS and TEXTURE_VIEW_NUM_LEVELS become levels.
 473     * If the texture target is TEXTURE_1D_ARRAY then
 474     * TEXTURE_VIEW_NUM_LAYERS becomes height.
 475     * If the texture target is TEXTURE_2D_ARRAY, TEXTURE_CUBE_MAP_ARRAY,
 476     * or TEXTURE_2D_MULTISAMPLE_ARRAY then TEXTURE_VIEW_NUM_LAYERS becomes
 477     * depth.
 478     * If the texture target is TEXTURE_CUBE_MAP, then
 479     * TEXTURE_VIEW_NUM_LAYERS becomes 6.
 480     * For any other texture target, TEXTURE_VIEW_NUM_LAYERS becomes 1.
 481     *
 482     * ARB_texture_multisample: Multisample textures do
 483     * not have multiple image levels.
 484     */
 485
 486    texObj->Immutable = GL_TRUE;
 487    texObj->ImmutableLevels = levels;
 488    texObj->MinLevel = 0;
 489    texObj->NumLevels = levels;
 490    texObj->MinLayer = 0;
 491    texObj->NumLayers = 1;
 492    switch (target) {
 493    case GL_TEXTURE_1D_ARRAY:
 494       texObj->NumLayers = texImage->Height;
 495       break;
 496
 497    case GL_TEXTURE_2D_MULTISAMPLE:
 498       texObj->NumLevels = 1;
 499       texObj->ImmutableLevels = 1;
 500       break;
 501
 502    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
 503       texObj->NumLevels = 1;
 504       texObj->ImmutableLevels = 1;
 505       /* fall through to set NumLayers */
 506
 507    case GL_TEXTURE_2D_ARRAY:
 508    case GL_TEXTURE_CUBE_MAP_ARRAY:
 509       texObj->NumLayers = texImage->Depth;
 510       break;
 511
 512    case GL_TEXTURE_CUBE_MAP:
 513       texObj->NumLayers = 6;
 514       break;
 515    }
 516 }
 517
 518 /**
 519  * glTextureView (ARB_texture_view)
 520  * If an error is found, record it with _mesa_error()
 521  * \return none.
 522  */
 523 static ALWAYS_INLINE void
 524 texture_view(struct gl_context *ctx, struct gl_texture_object *origTexObj,
 525              struct gl_texture_object *texObj, GLenum target,
 526              GLenum internalformat, GLuint minlevel, GLuint numlevels,
 527              GLuint minlayer, GLuint numlayers, bool no_error)
 528 {
 529    struct gl_texture_image *origTexImage;
 530    GLuint newViewNumLevels, newViewNumLayers;
 531    GLsizei width, height, depth;
 532    mesa_format texFormat;
 533    GLboolean sizeOK, dimensionsOK;
 534    GLenum faceTarget;
 535
 536    texFormat = _mesa_choose_texture_format(ctx, texObj, target, 0,
 537                                            internalformat, GL_NONE, GL_NONE);
 538    if (texFormat == MESA_FORMAT_NONE) return;
 539
 540    newViewNumLevels = MIN2(numlevels, origTexObj->NumLevels - minlevel);
 541    newViewNumLayers = MIN2(numlayers, origTexObj->NumLayers - minlayer);
 542
 543    faceTarget = _mesa_cube_face_target(origTexObj->Target, minlayer);
 544
 545    /* Get a reference to what will become this View's base level */
 546    origTexImage = _mesa_select_tex_image(origTexObj, faceTarget, minlevel);
 547    width = origTexImage->Width;
 548    height = origTexImage->Height;
 549    depth = origTexImage->Depth;
 550
 551    /* Adjust width, height, depth to be appropriate for new target */
 552    switch (target) {
 553    case GL_TEXTURE_1D:
 554       height = 1;
 555       break;
 556
 557    case GL_TEXTURE_3D:
 558       break;
 559
 560    case GL_TEXTURE_1D_ARRAY:
 561       height = (GLsizei) newViewNumLayers;
 562       break;
 563
 564    case GL_TEXTURE_2D:
 565    case GL_TEXTURE_2D_MULTISAMPLE:
 566    case GL_TEXTURE_RECTANGLE:
 567       depth = 1;
 568       break;
 569    case GL_TEXTURE_CUBE_MAP:
 570       /* If the new texture's target is TEXTURE_CUBE_MAP, the clamped
 571        * <numlayers> must be equal to 6.
 572        */
 573       if (!no_error && newViewNumLayers != 6) {
 574          _mesa_error(ctx, GL_INVALID_VALUE,
 575                      "glTextureView(clamped numlayers %d != 6)",
 576                      newViewNumLayers);
 577          return;
 578       }
 579       depth = 1;
 580       break;
 581
 582    case GL_TEXTURE_2D_ARRAY:
 583    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
 584       depth = newViewNumLayers;
 585       break;
 586    case GL_TEXTURE_CUBE_MAP_ARRAY:
 587       /* If the new texture's target is TEXTURE_CUBE_MAP_ARRAY,
 588        * then <numlayers> counts layer-faces rather than layers,
 589        * and the clamped <numlayers> must be a multiple of 6.
 590        * Otherwise, the error INVALID_VALUE is generated.
 591        */
 592       if (!no_error && (newViewNumLayers % 6) != 0) {
 593          _mesa_error(ctx, GL_INVALID_VALUE,
 594                      "glTextureView(clamped numlayers %d is not"
 595                      " a multiple of 6)",
 596                      newViewNumLayers);
 597          return;
 598       }
 599       depth = newViewNumLayers;
 600       break;
 601    }
 602
 603    if (!no_error) {
 604       /* If the dimensions of the original texture are larger than the maximum
 605        * supported dimensions of the new target, the error INVALID_OPERATION is
 606        * generated. For example, if the original texture has a TEXTURE_2D_ARRAY
 607        * target and its width is greater than MAX_CUBE_MAP_TEXTURE_SIZE, an
 608        * error will be generated if TextureView is called to create a
 609        * TEXTURE_CUBE_MAP view.
 610        */
 611       dimensionsOK = _mesa_legal_texture_dimensions(ctx, target, 0,
 612                                                     width, height, depth, 0);
 613       if (!dimensionsOK) {
 614          _mesa_error(ctx, GL_INVALID_OPERATION,
 615                      "glTextureView(invalid width or height or depth)");
 616          return;
 617       }
 618
 619       sizeOK = ctx->Driver.TestProxyTexImage(ctx, target, 1, 0, texFormat,
 620                                              origTexImage->NumSamples,
 621                                              width, height, depth);
 622       if (!sizeOK) {
 623          _mesa_error(ctx, GL_INVALID_OPERATION,
 624                      "glTextureView(invalid texture size)");
 625          return;
 626       }
 627
 628       /* If <target> is TEXTURE_1D, TEXTURE_2D, TEXTURE_3D, TEXTURE_RECTANGLE,
 629        * or TEXTURE_2D_MULTISAMPLE and <numlayers> does not equal 1, the error
 630        * INVALID_VALUE is generated.
 631        */
 632       switch (target) {
 633       case GL_TEXTURE_1D:
 634       case GL_TEXTURE_2D:
 635       case GL_TEXTURE_3D:
 636       case GL_TEXTURE_RECTANGLE:
 637       case GL_TEXTURE_2D_MULTISAMPLE:
 638          if (numlayers != 1) {
 639             _mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(numlayers %d != 1)",
 640                         numlayers);
 641             return;
 642          }
 643          break;
 644       case GL_TEXTURE_CUBE_MAP:
 645          break;
 646       case GL_TEXTURE_CUBE_MAP_ARRAY:
 647          break;
 648       }
 649
 650       /* If the new texture's target is TEXTURE_CUBE_MAP or
 651        * TEXTURE_CUBE_MAP_ARRAY, the width and height of the original texture's
 652        * levels must be equal otherwise the error INVALID_OPERATION is
 653        * generated.
 654        */
 655       if ((target == GL_TEXTURE_CUBE_MAP || target == GL_TEXTURE_CUBE_MAP_ARRAY)
 656           && (origTexImage->Width != origTexImage->Height)) {
 657          _mesa_error(ctx, GL_INVALID_OPERATION,
 658                      "glTextureView(origtexture width (%d) != height (%d))",
 659                      origTexImage->Width, origTexImage->Height);
 660          return;
 661       }
 662    }
 663
 664    /* When the original texture's target is TEXTURE_CUBE_MAP, the layer
 665     * parameters are interpreted in the same order as if it were a
 666     * TEXTURE_CUBE_MAP_ARRAY with 6 layer-faces.
 667     */
 668
 669    /* If the internal format does not exactly match the internal format of the
 670     * original texture, the contents of the memory are reinterpreted in the
 671     * same manner as for image bindings described in
 672     * section 3.9.20 (Texture Image Loads and Stores).
 673     */
 674
 675    /* TEXTURE_BASE_LEVEL and TEXTURE_MAX_LEVEL are interpreted
 676     * relative to the view and not relative to the original data store.
 677     */
 678
 679    if (!initialize_texture_fields(ctx, target, texObj, newViewNumLevels,
 680                                   width, height, depth,
 681                                   internalformat, texFormat,
 682                                   origTexImage->NumSamples,
 683                                   origTexImage->FixedSampleLocations)) {
 684       return; /* Already recorded error */
 685    }
 686
 687    texObj->MinLevel = origTexObj->MinLevel + minlevel;
 688    texObj->MinLayer = origTexObj->MinLayer + minlayer;
 689    texObj->NumLevels = newViewNumLevels;
 690    texObj->NumLayers = newViewNumLayers;
 691    texObj->Immutable = GL_TRUE;
 692    texObj->ImmutableLevels = origTexObj->ImmutableLevels;
 693    texObj->Target = target;
 694    texObj->TargetIndex = _mesa_tex_target_to_index(ctx, target);
 695    assert(texObj->TargetIndex < NUM_TEXTURE_TARGETS);
 696
 697    if (ctx->Driver.TextureView != NULL &&
 698        !ctx->Driver.TextureView(ctx, texObj, origTexObj)) {
 699       return; /* driver recorded error */
 700    }
 701 }
 702
 703 void GLAPIENTRY
 704 _mesa_TextureView_no_error(GLuint texture, GLenum target, GLuint origtexture,
 705                            GLenum internalformat,
 706                            GLuint minlevel, GLuint numlevels,
 707                            GLuint minlayer, GLuint numlayers)
 708 {
 709    struct gl_texture_object *texObj;
 710    struct gl_texture_object *origTexObj;
 711
 712    GET_CURRENT_CONTEXT(ctx);
 713
 714    origTexObj = _mesa_lookup_texture(ctx, origtexture);
 715    texObj = _mesa_lookup_texture(ctx, texture);
 716
 717    texture_view(ctx, origTexObj, texObj, target, internalformat, minlevel,
 718                 numlevels, minlayer, numlayers, true);
 719 }
 720
 721 void GLAPIENTRY
 722 _mesa_TextureView(GLuint texture, GLenum target, GLuint origtexture,
 723                   GLenum internalformat,
 724                   GLuint minlevel, GLuint numlevels,
 725                   GLuint minlayer, GLuint numlayers)
 726 {
 727    struct gl_texture_object *texObj;
 728    struct gl_texture_object *origTexObj;
 729    GLuint newViewMinLevel, newViewMinLayer;
 730
 731    GET_CURRENT_CONTEXT(ctx);
 732
 733    if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE))
 734       _mesa_debug(ctx, "glTextureView %d %s %d %s %d %d %d %d\n",
 735                   texture, _mesa_enum_to_string(target), origtexture,
 736                   _mesa_enum_to_string(internalformat),
 737                   minlevel, numlevels, minlayer, numlayers);
 738
 739    if (origtexture == 0) {
 740       _mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(origtexture = %u)",
 741                   origtexture);
 742       return;
 743    }
 744
 745    /* Need original texture information to validate arguments */
 746    origTexObj = _mesa_lookup_texture(ctx, origtexture);
 747
 748    /* If <origtexture> is not the name of a texture, INVALID_VALUE
 749     * is generated.
 750     */
 751    if (!origTexObj) {
 752       _mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(origtexture = %u)",
 753                   origtexture);
 754       return;
 755    }
 756
 757    /* If <origtexture>'s TEXTURE_IMMUTABLE_FORMAT value is not TRUE,
 758     * INVALID_OPERATION is generated.
 759     */
 760    if (!origTexObj->Immutable) {
 761       _mesa_error(ctx, GL_INVALID_OPERATION,
 762                   "glTextureView(origtexture not immutable)");
 763       return;
 764    }
 765
 766    /* If <texture> is 0, INVALID_VALUE is generated. */
 767    if (texture == 0) {
 768       _mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(texture = 0)");
 769       return;
 770    }
 771
 772    /* If <texture> is not a valid name returned by GenTextures,
 773     * the error INVALID_OPERATION is generated.
 774     */
 775    texObj = _mesa_lookup_texture(ctx, texture);
 776    if (texObj == NULL) {
 777       _mesa_error(ctx, GL_INVALID_OPERATION,
 778                   "glTextureView(texture = %u non-gen name)", texture);
 779       return;
 780    }
 781
 782    /* If <texture> has already been bound and given a target, then
 783     * the error INVALID_OPERATION is generated.
 784     */
 785    if (texObj->Target) {
 786       _mesa_error(ctx, GL_INVALID_OPERATION,
 787                   "glTextureView(texture = %u already bound)", texture);
 788       return;
 789    }
 790
 791    /* Check for compatible target */
 792    if (!target_valid(ctx, origTexObj->Target, target)) {
 793       return; /* error was recorded */
 794    }
 795
 796    /* minlevel and minlayer are relative to the view of origtexture.
 797     * If minlevel or minlayer is greater than level or layer, respectively,
 798     * return INVALID_VALUE.
 799     */
 800    newViewMinLevel = origTexObj->MinLevel + minlevel;
 801    newViewMinLayer = origTexObj->MinLayer + minlayer;
 802    if (newViewMinLevel >= (origTexObj->MinLevel + origTexObj->NumLevels)) {
 803       _mesa_error(ctx, GL_INVALID_VALUE,
 804                   "glTextureView(new minlevel (%d) > orig minlevel (%d)"
 805                   " + orig numlevels (%d))",
 806                   newViewMinLevel, origTexObj->MinLevel, origTexObj->NumLevels);
 807       return;
 808    }
 809
 810    if (newViewMinLayer >= (origTexObj->MinLayer + origTexObj->NumLayers)) {
 811       _mesa_error(ctx, GL_INVALID_VALUE,
 812                   "glTextureView(new minlayer (%d) > orig minlayer (%d)"
 813                   " + orig numlayers (%d))",
 814                   newViewMinLayer, origTexObj->MinLayer, origTexObj->NumLayers);
 815       return;
 816    }
 817
 818    if (!_mesa_texture_view_compatible_format(ctx,
 819                                    origTexObj->Image[0][0]->InternalFormat,
 820                                    internalformat)) {
 821       _mesa_error(ctx, GL_INVALID_OPERATION,
 822           "glTextureView(internalformat %s not compatible with origtexture %s)",
 823           _mesa_enum_to_string(internalformat),
 824           _mesa_enum_to_string(origTexObj->Image[0][0]->InternalFormat));
 825       return;
 826    }
 827
 828    texture_view(ctx, origTexObj, texObj, target, internalformat, minlevel,
 829                 numlevels, minlayer, numlayers, false);
 830 }