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
_mesa_texture_view_lookup_view_class(const struct gl_context * ctx,GLenum internalformat)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
initialize_texture_fields(struct gl_context * ctx,GLenum target,struct gl_texture_object * texObj,GLint levels,GLsizei width,GLsizei height,GLsizei depth,GLenum internalFormat,mesa_format texFormat)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 {
309 const GLuint numFaces = _mesa_num_tex_faces(target);
310 GLint level, levelWidth = width, levelHeight = height, levelDepth = depth;
311 GLuint face;
312
313 /* Pretend we are bound to initialize the gl_texture_image structs */
314 texObj->Target = target;
315
316 /* Set up all the texture object's gl_texture_images */
317 for (level = 0; level < levels; level++) {
318 for (face = 0; face < numFaces; face++) {
319 struct gl_texture_image *texImage;
320 const GLenum faceTarget = _mesa_cube_face_target(target, face);
321
322 texImage = _mesa_get_tex_image(ctx, texObj, faceTarget, level);
323
324 if (!texImage) {
325 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexStorage");
326 return GL_FALSE;
327 }
328
329 _mesa_init_teximage_fields(ctx, texImage,
330 levelWidth, levelHeight, levelDepth,
331 0, internalFormat, texFormat);
332 }
333
334 _mesa_next_mipmap_level_size(target, 0,
335 levelWidth, levelHeight, levelDepth,
336 &levelWidth, &levelHeight, &levelDepth);
337 }
338
339 /* "unbind" */
340 texObj->Target = 0;
341
342 return GL_TRUE;
343 }
344
345 #define RETURN_IF_SUPPORTED(t) do { \
346 if (newTarget == GL_ ## t) \
347 return true; \
348 } while (0)
349
350 /**
351 * Check for compatible target
352 * If an error is found, record it with _mesa_error()
353 * \return false if any error, true otherwise.
354 */
355 static bool
target_valid(struct gl_context * ctx,GLenum origTarget,GLenum newTarget)356 target_valid(struct gl_context *ctx, GLenum origTarget, GLenum newTarget)
357 {
358 /*
359 * From ARB_texture_view spec:
360 ---------------------------------------------------------------------------------------------------------
361 | Original target | Valid new targets |
362 ---------------------------------------------------------------------------------------------------------
363 | TEXTURE_1D | TEXTURE_1D, TEXTURE_1D_ARRAY |
364 | ------------------------------------------------------------------------------------------------------- |
365 | TEXTURE_2D | TEXTURE_2D, TEXTURE_2D_ARRAY |
366 | ------------------------------------------------------------------------------------------------------- |
367 | TEXTURE_3D | TEXTURE_3D |
368 | ------------------------------------------------------------------------------------------------------- |
369 | TEXTURE_CUBE_MAP | TEXTURE_CUBE_MAP, TEXTURE_2D, TEXTURE_2D_ARRAY, TEXTURE_CUBE_MAP_ARRAY |
370 | ------------------------------------------------------------------------------------------------------- |
371 | TEXTURE_RECTANGLE | TEXTURE_RECTANGLE |
372 | ------------------------------------------------------------------------------------------------------- |
373 | TEXTURE_BUFFER | <none> |
374 | ------------------------------------------------------------------------------------------------------- |
375 | TEXTURE_1D_ARRAY | TEXTURE_1D_ARRAY, TEXTURE_1D |
376 | ------------------------------------------------------------------------------------------------------- |
377 | TEXTURE_2D_ARRAY | TEXTURE_2D_ARRAY, TEXTURE_2D, TEXTURE_CUBE_MAP, TEXTURE_CUBE_MAP_ARRAY |
378 | ------------------------------------------------------------------------------------------------------- |
379 | TEXTURE_CUBE_MAP_ARRAY | TEXTURE_CUBE_MAP_ARRAY, TEXTURE_2D_ARRAY, TEXTURE_2D, TEXTURE_CUBE_MAP |
380 | ------------------------------------------------------------------------------------------------------- |
381 | TEXTURE_2D_MULTISAMPLE | TEXTURE_2D_MULTISAMPLE, TEXTURE_2D_MULTISAMPLE_ARRAY |
382 | ------------------------------------------------------------------------------------------------------- |
383 | TEXTURE_2D_MULTISAMPLE_ARRAY | TEXTURE_2D_MULTISAMPLE, TEXTURE_2D_MULTISAMPLE_ARRAY |
384 ---------------------------------------------------------------------------------------------------------
385 */
386
387 switch (origTarget) {
388 case GL_TEXTURE_1D:
389 case GL_TEXTURE_1D_ARRAY:
390 RETURN_IF_SUPPORTED(TEXTURE_1D);
391 RETURN_IF_SUPPORTED(TEXTURE_1D_ARRAY);
392 break;
393 case GL_TEXTURE_2D:
394 RETURN_IF_SUPPORTED(TEXTURE_2D);
395 RETURN_IF_SUPPORTED(TEXTURE_2D_ARRAY);
396 break;
397 case GL_TEXTURE_3D:
398 RETURN_IF_SUPPORTED(TEXTURE_3D);
399 break;
400 case GL_TEXTURE_RECTANGLE:
401 RETURN_IF_SUPPORTED(TEXTURE_RECTANGLE);
402 break;
403 case GL_TEXTURE_CUBE_MAP:
404 case GL_TEXTURE_2D_ARRAY:
405 case GL_TEXTURE_CUBE_MAP_ARRAY:
406 RETURN_IF_SUPPORTED(TEXTURE_2D);
407 RETURN_IF_SUPPORTED(TEXTURE_2D_ARRAY);
408 RETURN_IF_SUPPORTED(TEXTURE_CUBE_MAP);
409 RETURN_IF_SUPPORTED(TEXTURE_CUBE_MAP_ARRAY);
410 break;
411 case GL_TEXTURE_2D_MULTISAMPLE:
412 case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
413 RETURN_IF_SUPPORTED(TEXTURE_2D_MULTISAMPLE);
414 RETURN_IF_SUPPORTED(TEXTURE_2D_MULTISAMPLE_ARRAY);
415 break;
416 }
417 _mesa_error(ctx, GL_INVALID_OPERATION,
418 "glTextureView(illegal target=%s)",
419 _mesa_enum_to_string(newTarget));
420 return false;
421 }
422 #undef RETURN_IF_SUPPORTED
423
424 /**
425 * Check for compatible format
426 * If an error is found, record it with _mesa_error()
427 * \return false if any error, true otherwise.
428 */
429 bool
_mesa_texture_view_compatible_format(const struct gl_context * ctx,GLenum origInternalFormat,GLenum newInternalFormat)430 _mesa_texture_view_compatible_format(const struct gl_context *ctx,
431 GLenum origInternalFormat,
432 GLenum newInternalFormat)
433 {
434 unsigned int origViewClass, newViewClass;
435
436 /* The two textures' internal formats must be compatible according to
437 * Table 3.X.2 (Compatible internal formats for TextureView)
438 * if the internal format exists in that table the view class must match.
439 * The internal formats must be identical if not in that table,
440 * or an INVALID_OPERATION error is generated.
441 */
442 if (origInternalFormat == newInternalFormat)
443 return true;
444
445 origViewClass = _mesa_texture_view_lookup_view_class(ctx, origInternalFormat);
446 newViewClass = _mesa_texture_view_lookup_view_class(ctx, newInternalFormat);
447 if ((origViewClass == newViewClass) && origViewClass != false)
448 return true;
449
450 return false;
451 }
452
453 /**
454 * Helper function for TexStorage and teximagemultisample to set immutable
455 * texture state needed by ARB_texture_view.
456 */
457 void
_mesa_set_texture_view_state(struct gl_context * ctx,struct gl_texture_object * texObj,GLenum target,GLuint levels)458 _mesa_set_texture_view_state(struct gl_context *ctx,
459 struct gl_texture_object *texObj,
460 GLenum target, GLuint levels)
461 {
462 struct gl_texture_image *texImage;
463
464 /* Get a reference to what will become this View's base level */
465 texImage = _mesa_select_tex_image(texObj, target, 0);
466
467 /* When an immutable texture is created via glTexStorage or
468 * glTexImageMultisample,
469 * TEXTURE_IMMUTABLE_FORMAT becomes TRUE.
470 * TEXTURE_IMMUTABLE_LEVELS and TEXTURE_VIEW_NUM_LEVELS become levels.
471 * If the texture target is TEXTURE_1D_ARRAY then
472 * TEXTURE_VIEW_NUM_LAYERS becomes height.
473 * If the texture target is TEXTURE_2D_ARRAY, TEXTURE_CUBE_MAP_ARRAY,
474 * or TEXTURE_2D_MULTISAMPLE_ARRAY then TEXTURE_VIEW_NUM_LAYERS becomes
475 * depth.
476 * If the texture target is TEXTURE_CUBE_MAP, then
477 * TEXTURE_VIEW_NUM_LAYERS becomes 6.
478 * For any other texture target, TEXTURE_VIEW_NUM_LAYERS becomes 1.
479 *
480 * ARB_texture_multisample: Multisample textures do
481 * not have multiple image levels.
482 */
483
484 texObj->Immutable = GL_TRUE;
485 texObj->ImmutableLevels = levels;
486 texObj->MinLevel = 0;
487 texObj->NumLevels = levels;
488 texObj->MinLayer = 0;
489 texObj->NumLayers = 1;
490 switch (target) {
491 case GL_TEXTURE_1D_ARRAY:
492 texObj->NumLayers = texImage->Height;
493 break;
494
495 case GL_TEXTURE_2D_MULTISAMPLE:
496 texObj->NumLevels = 1;
497 texObj->ImmutableLevels = 1;
498 break;
499
500 case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
501 texObj->NumLevels = 1;
502 texObj->ImmutableLevels = 1;
503 /* fall through to set NumLayers */
504
505 case GL_TEXTURE_2D_ARRAY:
506 case GL_TEXTURE_CUBE_MAP_ARRAY:
507 texObj->NumLayers = texImage->Depth;
508 break;
509
510 case GL_TEXTURE_CUBE_MAP:
511 texObj->NumLayers = 6;
512 break;
513 }
514 }
515
516 /**
517 * glTextureView (ARB_texture_view)
518 * If an error is found, record it with _mesa_error()
519 * \return none.
520 */
521 void GLAPIENTRY
_mesa_TextureView(GLuint texture,GLenum target,GLuint origtexture,GLenum internalformat,GLuint minlevel,GLuint numlevels,GLuint minlayer,GLuint numlayers)522 _mesa_TextureView(GLuint texture, GLenum target, GLuint origtexture,
523 GLenum internalformat,
524 GLuint minlevel, GLuint numlevels,
525 GLuint minlayer, GLuint numlayers)
526 {
527 struct gl_texture_object *texObj;
528 struct gl_texture_object *origTexObj;
529 struct gl_texture_image *origTexImage;
530 GLuint newViewMinLevel, newViewMinLayer;
531 GLuint newViewNumLevels, newViewNumLayers;
532 GLsizei width, height, depth;
533 mesa_format texFormat;
534 GLboolean sizeOK, dimensionsOK;
535 GLenum faceTarget;
536
537 GET_CURRENT_CONTEXT(ctx);
538
539 if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE))
540 _mesa_debug(ctx, "glTextureView %d %s %d %s %d %d %d %d\n",
541 texture, _mesa_enum_to_string(target), origtexture,
542 _mesa_enum_to_string(internalformat),
543 minlevel, numlevels, minlayer, numlayers);
544
545 if (origtexture == 0) {
546 _mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(origtexture = %u)",
547 origtexture);
548 return;
549 }
550
551 /* Need original texture information to validate arguments */
552 origTexObj = _mesa_lookup_texture(ctx, origtexture);
553
554 /* If <origtexture> is not the name of a texture, INVALID_VALUE
555 * is generated.
556 */
557 if (!origTexObj) {
558 _mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(origtexture = %u)",
559 origtexture);
560 return;
561 }
562
563 /* If <origtexture>'s TEXTURE_IMMUTABLE_FORMAT value is not TRUE,
564 * INVALID_OPERATION is generated.
565 */
566 if (!origTexObj->Immutable) {
567 _mesa_error(ctx, GL_INVALID_OPERATION,
568 "glTextureView(origtexture not immutable)");
569 return;
570 }
571
572 /* If <texture> is 0, INVALID_VALUE is generated. */
573 if (texture == 0) {
574 _mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(texture = 0)");
575 return;
576 }
577
578 /* If <texture> is not a valid name returned by GenTextures,
579 * the error INVALID_OPERATION is generated.
580 */
581 texObj = _mesa_lookup_texture(ctx, texture);
582 if (texObj == NULL) {
583 _mesa_error(ctx, GL_INVALID_OPERATION,
584 "glTextureView(texture = %u non-gen name)", texture);
585 return;
586 }
587
588 /* If <texture> has already been bound and given a target, then
589 * the error INVALID_OPERATION is generated.
590 */
591 if (texObj->Target) {
592 _mesa_error(ctx, GL_INVALID_OPERATION,
593 "glTextureView(texture = %u already bound)", texture);
594 return;
595 }
596
597 /* Check for compatible target */
598 if (!target_valid(ctx, origTexObj->Target, target)) {
599 return; /* error was recorded */
600 }
601
602 /* minlevel and minlayer are relative to the view of origtexture.
603 * If minlevel or minlayer is greater than level or layer, respectively,
604 * return INVALID_VALUE.
605 */
606 newViewMinLevel = origTexObj->MinLevel + minlevel;
607 newViewMinLayer = origTexObj->MinLayer + minlayer;
608 if (newViewMinLevel >= (origTexObj->MinLevel + origTexObj->NumLevels)) {
609 _mesa_error(ctx, GL_INVALID_VALUE,
610 "glTextureView(new minlevel (%d) > orig minlevel (%d)"
611 " + orig numlevels (%d))",
612 newViewMinLevel, origTexObj->MinLevel, origTexObj->NumLevels);
613 return;
614 }
615
616 if (newViewMinLayer >= (origTexObj->MinLayer + origTexObj->NumLayers)) {
617 _mesa_error(ctx, GL_INVALID_VALUE,
618 "glTextureView(new minlayer (%d) > orig minlayer (%d)"
619 " + orig numlayers (%d))",
620 newViewMinLayer, origTexObj->MinLayer, origTexObj->NumLayers);
621 return;
622 }
623
624 if (!_mesa_texture_view_compatible_format(ctx,
625 origTexObj->Image[0][0]->InternalFormat,
626 internalformat)) {
627 _mesa_error(ctx, GL_INVALID_OPERATION,
628 "glTextureView(internalformat %s not compatible with origtexture %s)",
629 _mesa_enum_to_string(internalformat),
630 _mesa_enum_to_string(origTexObj->Image[0][0]->InternalFormat));
631 return;
632 }
633
634 texFormat = _mesa_choose_texture_format(ctx, texObj, target, 0,
635 internalformat, GL_NONE, GL_NONE);
636 assert(texFormat != MESA_FORMAT_NONE);
637 if (texFormat == MESA_FORMAT_NONE) return;
638
639 newViewNumLevels = MIN2(numlevels, origTexObj->NumLevels - minlevel);
640 newViewNumLayers = MIN2(numlayers, origTexObj->NumLayers - minlayer);
641
642 faceTarget = _mesa_cube_face_target(origTexObj->Target, minlayer);
643
644 /* Get a reference to what will become this View's base level */
645 origTexImage = _mesa_select_tex_image(origTexObj, faceTarget, minlevel);
646 width = origTexImage->Width;
647 height = origTexImage->Height;
648 depth = origTexImage->Depth;
649
650 /* Adjust width, height, depth to be appropriate for new target */
651 switch (target) {
652 case GL_TEXTURE_1D:
653 height = 1;
654 break;
655
656 case GL_TEXTURE_3D:
657 break;
658
659 case GL_TEXTURE_1D_ARRAY:
660 height = (GLsizei) newViewNumLayers;
661 break;
662
663 case GL_TEXTURE_2D:
664 case GL_TEXTURE_2D_MULTISAMPLE:
665 case GL_TEXTURE_RECTANGLE:
666 depth = 1;
667 break;
668 case GL_TEXTURE_CUBE_MAP:
669 /* If the new texture's target is TEXTURE_CUBE_MAP, the clamped
670 * <numlayers> must be equal to 6.
671 */
672 if (newViewNumLayers != 6) {
673 _mesa_error(ctx, GL_INVALID_VALUE,
674 "glTextureView(clamped numlayers %d != 6)",
675 newViewNumLayers);
676 return;
677 }
678 depth = 1;
679 break;
680
681 case GL_TEXTURE_2D_ARRAY:
682 case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
683 depth = newViewNumLayers;
684 break;
685 case GL_TEXTURE_CUBE_MAP_ARRAY:
686 /* If the new texture's target is TEXTURE_CUBE_MAP_ARRAY,
687 * then <numlayers> counts layer-faces rather than layers,
688 * and the clamped <numlayers> must be a multiple of 6.
689 * Otherwise, the error INVALID_VALUE is generated.
690 */
691 if ((newViewNumLayers % 6) != 0) {
692 _mesa_error(ctx, GL_INVALID_VALUE,
693 "glTextureView(clamped numlayers %d is not"
694 " a multiple of 6)",
695 newViewNumLayers);
696 return;
697 }
698 depth = newViewNumLayers;
699 break;
700 }
701
702 /* If the dimensions of the original texture are larger than the maximum
703 * supported dimensions of the new target, the error INVALID_OPERATION is
704 * generated. For example, if the original texture has a TEXTURE_2D_ARRAY
705 * target and its width is greater than MAX_CUBE_MAP_TEXTURE_SIZE, an error
706 * will be generated if TextureView is called to create a TEXTURE_CUBE_MAP
707 * view.
708 */
709 dimensionsOK = _mesa_legal_texture_dimensions(ctx, target, 0,
710 width, height, depth, 0);
711 if (!dimensionsOK) {
712 _mesa_error(ctx, GL_INVALID_OPERATION,
713 "glTextureView(invalid width or height or depth)");
714 return;
715 }
716
717 sizeOK = ctx->Driver.TestProxyTexImage(ctx, target, 1, 0, texFormat,
718 origTexImage->NumSamples,
719 width, height, depth);
720 if (!sizeOK) {
721 _mesa_error(ctx, GL_INVALID_OPERATION,
722 "glTextureView(invalid texture size)");
723 return;
724 }
725
726 /* If <target> is TEXTURE_1D, TEXTURE_2D, TEXTURE_3D, TEXTURE_RECTANGLE,
727 * or TEXTURE_2D_MULTISAMPLE and <numlayers> does not equal 1, the error
728 * INVALID_VALUE is generated.
729 */
730 switch (target) {
731 case GL_TEXTURE_1D:
732 case GL_TEXTURE_2D:
733 case GL_TEXTURE_3D:
734 case GL_TEXTURE_RECTANGLE:
735 case GL_TEXTURE_2D_MULTISAMPLE:
736 if (numlayers != 1) {
737 _mesa_error(ctx, GL_INVALID_VALUE, "glTextureView(numlayers %d != 1)",
738 numlayers);
739 return;
740 }
741 break;
742 case GL_TEXTURE_CUBE_MAP:
743 break;
744 case GL_TEXTURE_CUBE_MAP_ARRAY:
745 break;
746 }
747
748 /* If the new texture's target is TEXTURE_CUBE_MAP or
749 * TEXTURE_CUBE_MAP_ARRAY, the width and height of the original texture's
750 * levels must be equal otherwise the error INVALID_OPERATION is generated.
751 */
752 if ((target == GL_TEXTURE_CUBE_MAP || target == GL_TEXTURE_CUBE_MAP_ARRAY) &&
753 (origTexImage->Width != origTexImage->Height)) {
754 _mesa_error(ctx, GL_INVALID_OPERATION,
755 "glTextureView(origtexture width (%d) != height (%d))",
756 origTexImage->Width, origTexImage->Height);
757 return;
758 }
759
760 /* When the original texture's target is TEXTURE_CUBE_MAP, the layer
761 * parameters are interpreted in the same order as if it were a
762 * TEXTURE_CUBE_MAP_ARRAY with 6 layer-faces.
763 */
764
765 /* If the internal format does not exactly match the internal format of the
766 * original texture, the contents of the memory are reinterpreted in the
767 * same manner as for image bindings described in
768 * section 3.9.20 (Texture Image Loads and Stores).
769 */
770
771 /* TEXTURE_BASE_LEVEL and TEXTURE_MAX_LEVEL are interpreted
772 * relative to the view and not relative to the original data store.
773 */
774
775 if (!initialize_texture_fields(ctx, target, texObj, newViewNumLevels,
776 width, height, depth,
777 internalformat, texFormat)) {
778 return; /* Already recorded error */
779 }
780
781 texObj->MinLevel = newViewMinLevel;
782 texObj->MinLayer = newViewMinLayer;
783 texObj->NumLevels = newViewNumLevels;
784 texObj->NumLayers = newViewNumLayers;
785 texObj->Immutable = GL_TRUE;
786 texObj->ImmutableLevels = origTexObj->ImmutableLevels;
787 texObj->Target = target;
788 texObj->TargetIndex = _mesa_tex_target_to_index(ctx, target);
789 assert(texObj->TargetIndex < NUM_TEXTURE_TARGETS);
790
791 if (ctx->Driver.TextureView != NULL &&
792 !ctx->Driver.TextureView(ctx, texObj, origTexObj)) {
793 return; /* driver recorded error */
794 }
795 }
796