2 * Mesa 3-D graphics library
4 * Copyright (C) 2013 LunarG, Inc.
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:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
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.
25 * Courtney Goeltzenleuchter <courtney@lunarg.com>
31 * GL_ARB_texture_view functions
42 #include "texstorage.h"
43 #include "textureview.h"
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 ---------------------------------------------------------------------------
85 struct internal_format_class_info
{
87 GLenum internal_format
;
89 static const struct internal_format_class_info compatible_internal_formats
[] = {
90 {GL_VIEW_CLASS_128_BITS
, GL_RGBA32F
},
91 {GL_VIEW_CLASS_128_BITS
, GL_RGBA32UI
},
92 {GL_VIEW_CLASS_128_BITS
, GL_RGBA32I
},
93 {GL_VIEW_CLASS_96_BITS
, GL_RGB32F
},
94 {GL_VIEW_CLASS_96_BITS
, GL_RGB32UI
},
95 {GL_VIEW_CLASS_96_BITS
, GL_RGB32I
},
96 {GL_VIEW_CLASS_64_BITS
, GL_RGBA16F
},
97 {GL_VIEW_CLASS_64_BITS
, GL_RG32F
},
98 {GL_VIEW_CLASS_64_BITS
, GL_RGBA16UI
},
99 {GL_VIEW_CLASS_64_BITS
, GL_RG32UI
},
100 {GL_VIEW_CLASS_64_BITS
, GL_RGBA16I
},
101 {GL_VIEW_CLASS_64_BITS
, GL_RG32I
},
102 {GL_VIEW_CLASS_64_BITS
, GL_RGBA16
},
103 {GL_VIEW_CLASS_64_BITS
, GL_RGBA16_SNORM
},
104 {GL_VIEW_CLASS_48_BITS
, GL_RGB16
},
105 {GL_VIEW_CLASS_48_BITS
, GL_RGB16_SNORM
},
106 {GL_VIEW_CLASS_48_BITS
, GL_RGB16F
},
107 {GL_VIEW_CLASS_48_BITS
, GL_RGB16UI
},
108 {GL_VIEW_CLASS_48_BITS
, GL_RGB16I
},
109 {GL_VIEW_CLASS_32_BITS
, GL_RG16F
},
110 {GL_VIEW_CLASS_32_BITS
, GL_R11F_G11F_B10F
},
111 {GL_VIEW_CLASS_32_BITS
, GL_R32F
},
112 {GL_VIEW_CLASS_32_BITS
, GL_RGB10_A2UI
},
113 {GL_VIEW_CLASS_32_BITS
, GL_RGBA8UI
},
114 {GL_VIEW_CLASS_32_BITS
, GL_RG16UI
},
115 {GL_VIEW_CLASS_32_BITS
, GL_R32UI
},
116 {GL_VIEW_CLASS_32_BITS
, GL_RGBA8I
},
117 {GL_VIEW_CLASS_32_BITS
, GL_RG16I
},
118 {GL_VIEW_CLASS_32_BITS
, GL_R32I
},
119 {GL_VIEW_CLASS_32_BITS
, GL_RGB10_A2
},
120 {GL_VIEW_CLASS_32_BITS
, GL_RGBA8
},
121 {GL_VIEW_CLASS_32_BITS
, GL_RG16
},
122 {GL_VIEW_CLASS_32_BITS
, GL_RGBA8_SNORM
},
123 {GL_VIEW_CLASS_32_BITS
, GL_RG16_SNORM
},
124 {GL_VIEW_CLASS_32_BITS
, GL_SRGB8_ALPHA8
},
125 {GL_VIEW_CLASS_32_BITS
, GL_RGB9_E5
},
126 {GL_VIEW_CLASS_24_BITS
, GL_RGB8
},
127 {GL_VIEW_CLASS_24_BITS
, GL_RGB8_SNORM
},
128 {GL_VIEW_CLASS_24_BITS
, GL_SRGB8
},
129 {GL_VIEW_CLASS_24_BITS
, GL_RGB8UI
},
130 {GL_VIEW_CLASS_24_BITS
, GL_RGB8I
},
131 {GL_VIEW_CLASS_16_BITS
, GL_R16F
},
132 {GL_VIEW_CLASS_16_BITS
, GL_RG8UI
},
133 {GL_VIEW_CLASS_16_BITS
, GL_R16UI
},
134 {GL_VIEW_CLASS_16_BITS
, GL_RG8I
},
135 {GL_VIEW_CLASS_16_BITS
, GL_R16I
},
136 {GL_VIEW_CLASS_16_BITS
, GL_RG8
},
137 {GL_VIEW_CLASS_16_BITS
, GL_R16
},
138 {GL_VIEW_CLASS_16_BITS
, GL_RG8_SNORM
},
139 {GL_VIEW_CLASS_16_BITS
, GL_R16_SNORM
},
140 {GL_VIEW_CLASS_8_BITS
, GL_R8UI
},
141 {GL_VIEW_CLASS_8_BITS
, GL_R8I
},
142 {GL_VIEW_CLASS_8_BITS
, GL_R8
},
143 {GL_VIEW_CLASS_8_BITS
, GL_R8_SNORM
},
144 {GL_VIEW_CLASS_RGTC1_RED
, GL_COMPRESSED_RED_RGTC1
},
145 {GL_VIEW_CLASS_RGTC1_RED
, GL_COMPRESSED_SIGNED_RED_RGTC1
},
146 {GL_VIEW_CLASS_RGTC2_RG
, GL_COMPRESSED_RG_RGTC2
},
147 {GL_VIEW_CLASS_RGTC2_RG
, GL_COMPRESSED_SIGNED_RG_RGTC2
},
148 {GL_VIEW_CLASS_BPTC_UNORM
, GL_COMPRESSED_RGBA_BPTC_UNORM_ARB
},
149 {GL_VIEW_CLASS_BPTC_UNORM
, GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM_ARB
},
150 {GL_VIEW_CLASS_BPTC_FLOAT
, GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_ARB
},
151 {GL_VIEW_CLASS_BPTC_FLOAT
, GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_ARB
},
154 static const struct internal_format_class_info s3tc_compatible_internal_formats
[] = {
155 {GL_VIEW_CLASS_S3TC_DXT1_RGB
, GL_COMPRESSED_RGB_S3TC_DXT1_EXT
},
156 {GL_VIEW_CLASS_S3TC_DXT1_RGB
, GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
},
157 {GL_VIEW_CLASS_S3TC_DXT1_RGBA
, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
},
158 {GL_VIEW_CLASS_S3TC_DXT1_RGBA
, GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
},
159 {GL_VIEW_CLASS_S3TC_DXT3_RGBA
, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
},
160 {GL_VIEW_CLASS_S3TC_DXT3_RGBA
, GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
},
161 {GL_VIEW_CLASS_S3TC_DXT5_RGBA
, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
},
162 {GL_VIEW_CLASS_S3TC_DXT5_RGBA
, GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
},
166 * Lookup format view class based on internalformat
167 * \return VIEW_CLASS if internalformat found in table, false otherwise.
170 lookup_view_class(const struct gl_context
*ctx
, GLenum internalformat
)
174 for (i
= 0; i
< ARRAY_SIZE(compatible_internal_formats
); i
++) {
175 if (compatible_internal_formats
[i
].internal_format
== internalformat
)
176 return compatible_internal_formats
[i
].view_class
;
179 if (ctx
->Extensions
.EXT_texture_compression_s3tc
&&
180 ctx
->Extensions
.EXT_texture_sRGB
) {
181 for (i
= 0; i
< ARRAY_SIZE(s3tc_compatible_internal_formats
); i
++) {
182 if (s3tc_compatible_internal_formats
[i
].internal_format
184 return s3tc_compatible_internal_formats
[i
].view_class
;
191 * Initialize new texture's gl_texture_image structures. Will not call driver
192 * to allocate new space, simply record relevant layer, face, format, etc.
193 * \return GL_FALSE if any error, GL_TRUE otherwise.
196 initialize_texture_fields(struct gl_context
*ctx
,
198 struct gl_texture_object
*texObj
,
200 GLsizei width
, GLsizei height
, GLsizei depth
,
201 GLenum internalFormat
, mesa_format texFormat
)
203 const GLuint numFaces
= _mesa_num_tex_faces(target
);
204 GLint level
, levelWidth
= width
, levelHeight
= height
, levelDepth
= depth
;
207 /* Pretend we are bound to initialize the gl_texture_image structs */
208 texObj
->Target
= target
;
210 /* Set up all the texture object's gl_texture_images */
211 for (level
= 0; level
< levels
; level
++) {
212 for (face
= 0; face
< numFaces
; face
++) {
213 struct gl_texture_image
*texImage
;
214 GLenum faceTarget
= target
;
216 if (target
== GL_TEXTURE_CUBE_MAP
)
217 faceTarget
= GL_TEXTURE_CUBE_MAP_POSITIVE_X
+ face
;
219 texImage
= _mesa_get_tex_image(ctx
, texObj
, faceTarget
, level
);
222 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glTexStorage");
226 _mesa_init_teximage_fields(ctx
, texImage
,
227 levelWidth
, levelHeight
, levelDepth
,
228 0, internalFormat
, texFormat
);
231 _mesa_next_mipmap_level_size(target
, 0,
232 levelWidth
, levelHeight
, levelDepth
,
233 &levelWidth
, &levelHeight
, &levelDepth
);
242 #define RETURN_IF_SUPPORTED(t) do { \
243 if (newTarget == GL_ ## t) \
248 * Check for compatible target
249 * If an error is found, record it with _mesa_error()
250 * \return false if any error, true otherwise.
253 target_valid(struct gl_context
*ctx
, GLenum origTarget
, GLenum newTarget
)
256 * From ARB_texture_view spec:
257 ---------------------------------------------------------------------------------------------------------
258 | Original target | Valid new targets |
259 ---------------------------------------------------------------------------------------------------------
260 | TEXTURE_1D | TEXTURE_1D, TEXTURE_1D_ARRAY |
261 | ------------------------------------------------------------------------------------------------------- |
262 | TEXTURE_2D | TEXTURE_2D, TEXTURE_2D_ARRAY |
263 | ------------------------------------------------------------------------------------------------------- |
264 | TEXTURE_3D | TEXTURE_3D |
265 | ------------------------------------------------------------------------------------------------------- |
266 | TEXTURE_CUBE_MAP | TEXTURE_CUBE_MAP, TEXTURE_2D, TEXTURE_2D_ARRAY, TEXTURE_CUBE_MAP_ARRAY |
267 | ------------------------------------------------------------------------------------------------------- |
268 | TEXTURE_RECTANGLE | TEXTURE_RECTANGLE |
269 | ------------------------------------------------------------------------------------------------------- |
270 | TEXTURE_BUFFER | <none> |
271 | ------------------------------------------------------------------------------------------------------- |
272 | TEXTURE_1D_ARRAY | TEXTURE_1D_ARRAY, TEXTURE_1D |
273 | ------------------------------------------------------------------------------------------------------- |
274 | TEXTURE_2D_ARRAY | TEXTURE_2D_ARRAY, TEXTURE_2D, TEXTURE_CUBE_MAP, TEXTURE_CUBE_MAP_ARRAY |
275 | ------------------------------------------------------------------------------------------------------- |
276 | TEXTURE_CUBE_MAP_ARRAY | TEXTURE_CUBE_MAP_ARRAY, TEXTURE_2D_ARRAY, TEXTURE_2D, TEXTURE_CUBE_MAP |
277 | ------------------------------------------------------------------------------------------------------- |
278 | TEXTURE_2D_MULTISAMPLE | TEXTURE_2D_MULTISAMPLE, TEXTURE_2D_MULTISAMPLE_ARRAY |
279 | ------------------------------------------------------------------------------------------------------- |
280 | TEXTURE_2D_MULTISAMPLE_ARRAY | TEXTURE_2D_MULTISAMPLE, TEXTURE_2D_MULTISAMPLE_ARRAY |
281 ---------------------------------------------------------------------------------------------------------
284 switch (origTarget
) {
286 case GL_TEXTURE_1D_ARRAY
:
287 RETURN_IF_SUPPORTED(TEXTURE_1D
);
288 RETURN_IF_SUPPORTED(TEXTURE_1D_ARRAY
);
291 RETURN_IF_SUPPORTED(TEXTURE_2D
);
292 RETURN_IF_SUPPORTED(TEXTURE_2D_ARRAY
);
295 RETURN_IF_SUPPORTED(TEXTURE_3D
);
297 case GL_TEXTURE_RECTANGLE
:
298 RETURN_IF_SUPPORTED(TEXTURE_RECTANGLE
);
300 case GL_TEXTURE_CUBE_MAP
:
301 case GL_TEXTURE_2D_ARRAY
:
302 case GL_TEXTURE_CUBE_MAP_ARRAY
:
303 RETURN_IF_SUPPORTED(TEXTURE_2D
);
304 RETURN_IF_SUPPORTED(TEXTURE_2D_ARRAY
);
305 RETURN_IF_SUPPORTED(TEXTURE_CUBE_MAP
);
306 RETURN_IF_SUPPORTED(TEXTURE_CUBE_MAP_ARRAY
);
308 case GL_TEXTURE_2D_MULTISAMPLE
:
309 case GL_TEXTURE_2D_MULTISAMPLE_ARRAY
:
310 RETURN_IF_SUPPORTED(TEXTURE_2D_MULTISAMPLE
);
311 RETURN_IF_SUPPORTED(TEXTURE_2D_MULTISAMPLE_ARRAY
);
314 _mesa_error(ctx
, GL_INVALID_OPERATION
,
315 "glTextureView(illegal target=%s)",
316 _mesa_lookup_enum_by_nr(newTarget
));
319 #undef RETURN_IF_SUPPORTED
322 * Check for compatible format
323 * If an error is found, record it with _mesa_error()
324 * \return false if any error, true otherwise.
327 _mesa_texture_view_compatible_format(const struct gl_context
*ctx
,
328 GLenum origInternalFormat
,
329 GLenum newInternalFormat
)
331 unsigned int origViewClass
, newViewClass
;
333 /* The two textures' internal formats must be compatible according to
334 * Table 3.X.2 (Compatible internal formats for TextureView)
335 * if the internal format exists in that table the view class must match.
336 * The internal formats must be identical if not in that table,
337 * or an INVALID_OPERATION error is generated.
339 if (origInternalFormat
== newInternalFormat
)
342 origViewClass
= lookup_view_class(ctx
, origInternalFormat
);
343 newViewClass
= lookup_view_class(ctx
, newInternalFormat
);
344 if ((origViewClass
== newViewClass
) && origViewClass
!= false)
351 * Helper function for TexStorage and teximagemultisample to set immutable
352 * texture state needed by ARB_texture_view.
355 _mesa_set_texture_view_state(struct gl_context
*ctx
,
356 struct gl_texture_object
*texObj
,
357 GLenum target
, GLuint levels
)
359 struct gl_texture_image
*texImage
;
361 /* Get a reference to what will become this View's base level */
362 texImage
= _mesa_select_tex_image(texObj
, target
, 0);
364 /* When an immutable texture is created via glTexStorage or
365 * glTexImageMultisample,
366 * TEXTURE_IMMUTABLE_FORMAT becomes TRUE.
367 * TEXTURE_IMMUTABLE_LEVELS and TEXTURE_VIEW_NUM_LEVELS become levels.
368 * If the texture target is TEXTURE_1D_ARRAY then
369 * TEXTURE_VIEW_NUM_LAYERS becomes height.
370 * If the texture target is TEXTURE_2D_ARRAY, TEXTURE_CUBE_MAP_ARRAY,
371 * or TEXTURE_2D_MULTISAMPLE_ARRAY then TEXTURE_VIEW_NUM_LAYERS becomes
373 * If the texture target is TEXTURE_CUBE_MAP, then
374 * TEXTURE_VIEW_NUM_LAYERS becomes 6.
375 * For any other texture target, TEXTURE_VIEW_NUM_LAYERS becomes 1.
377 * ARB_texture_multisample: Multisample textures do
378 * not have multiple image levels.
381 texObj
->Immutable
= GL_TRUE
;
382 texObj
->ImmutableLevels
= levels
;
383 texObj
->MinLevel
= 0;
384 texObj
->NumLevels
= levels
;
385 texObj
->MinLayer
= 0;
386 texObj
->NumLayers
= 1;
388 case GL_TEXTURE_1D_ARRAY
:
389 texObj
->NumLayers
= texImage
->Height
;
392 case GL_TEXTURE_2D_MULTISAMPLE
:
393 texObj
->NumLevels
= 1;
394 texObj
->ImmutableLevels
= 1;
397 case GL_TEXTURE_2D_MULTISAMPLE_ARRAY
:
398 texObj
->NumLevels
= 1;
399 texObj
->ImmutableLevels
= 1;
400 /* fall through to set NumLayers */
402 case GL_TEXTURE_2D_ARRAY
:
403 case GL_TEXTURE_CUBE_MAP_ARRAY
:
404 texObj
->NumLayers
= texImage
->Depth
;
407 case GL_TEXTURE_CUBE_MAP
:
408 texObj
->NumLayers
= 6;
414 * glTextureView (ARB_texture_view)
415 * If an error is found, record it with _mesa_error()
419 _mesa_TextureView(GLuint texture
, GLenum target
, GLuint origtexture
,
420 GLenum internalformat
,
421 GLuint minlevel
, GLuint numlevels
,
422 GLuint minlayer
, GLuint numlayers
)
424 struct gl_texture_object
*texObj
;
425 struct gl_texture_object
*origTexObj
;
426 struct gl_texture_image
*origTexImage
;
427 GLuint newViewMinLevel
, newViewMinLayer
;
428 GLuint newViewNumLevels
, newViewNumLayers
;
429 GLsizei width
, height
, depth
;
430 mesa_format texFormat
;
431 GLboolean sizeOK
, dimensionsOK
;
434 GET_CURRENT_CONTEXT(ctx
);
436 if (MESA_VERBOSE
& (VERBOSE_API
| VERBOSE_TEXTURE
))
437 _mesa_debug(ctx
, "glTextureView %d %s %d %s %d %d %d %d\n",
438 texture
, _mesa_lookup_enum_by_nr(target
), origtexture
,
439 _mesa_lookup_enum_by_nr(internalformat
),
440 minlevel
, numlevels
, minlayer
, numlayers
);
442 if (origtexture
== 0) {
443 _mesa_error(ctx
, GL_INVALID_VALUE
, "glTextureView(origtexture = %u)",
448 /* Need original texture information to validate arguments */
449 origTexObj
= _mesa_lookup_texture(ctx
, origtexture
);
451 /* If <origtexture> is not the name of a texture, INVALID_VALUE
455 _mesa_error(ctx
, GL_INVALID_VALUE
, "glTextureView(origtexture = %u)",
460 /* If <origtexture>'s TEXTURE_IMMUTABLE_FORMAT value is not TRUE,
461 * INVALID_OPERATION is generated.
463 if (!origTexObj
->Immutable
) {
464 _mesa_error(ctx
, GL_INVALID_OPERATION
,
465 "glTextureView(origtexture not immutable)");
469 /* If <texture> is 0, INVALID_VALUE is generated. */
471 _mesa_error(ctx
, GL_INVALID_VALUE
, "glTextureView(texture = 0)");
475 /* If <texture> is not a valid name returned by GenTextures,
476 * the error INVALID_OPERATION is generated.
478 texObj
= _mesa_lookup_texture(ctx
, texture
);
479 if (texObj
== NULL
) {
480 _mesa_error(ctx
, GL_INVALID_OPERATION
,
481 "glTextureView(texture = %u non-gen name)", texture
);
485 /* If <texture> has already been bound and given a target, then
486 * the error INVALID_OPERATION is generated.
488 if (texObj
->Target
) {
489 _mesa_error(ctx
, GL_INVALID_OPERATION
,
490 "glTextureView(texture = %u already bound)", texture
);
494 /* Check for compatible target */
495 if (!target_valid(ctx
, origTexObj
->Target
, target
)) {
496 return; /* error was recorded */
499 /* minlevel and minlayer are relative to the view of origtexture.
500 * If minlevel or minlayer is greater than level or layer, respectively,
501 * return INVALID_VALUE.
503 newViewMinLevel
= origTexObj
->MinLevel
+ minlevel
;
504 newViewMinLayer
= origTexObj
->MinLayer
+ minlayer
;
505 if (newViewMinLevel
>= (origTexObj
->MinLevel
+ origTexObj
->NumLevels
)) {
506 _mesa_error(ctx
, GL_INVALID_VALUE
,
507 "glTextureView(new minlevel (%d) > orig minlevel (%d)"
508 " + orig numlevels (%d))",
509 newViewMinLevel
, origTexObj
->MinLevel
, origTexObj
->NumLevels
);
513 if (newViewMinLayer
>= (origTexObj
->MinLayer
+ origTexObj
->NumLayers
)) {
514 _mesa_error(ctx
, GL_INVALID_VALUE
,
515 "glTextureView(new minlayer (%d) > orig minlayer (%d)"
516 " + orig numlayers (%d))",
517 newViewMinLayer
, origTexObj
->MinLayer
, origTexObj
->NumLayers
);
521 if (!_mesa_texture_view_compatible_format(ctx
,
522 origTexObj
->Image
[0][0]->InternalFormat
,
524 _mesa_error(ctx
, GL_INVALID_OPERATION
,
525 "glTextureView(internalformat %s not compatible with origtexture %s)",
526 _mesa_lookup_enum_by_nr(internalformat
),
527 _mesa_lookup_enum_by_nr(origTexObj
->Image
[0][0]->InternalFormat
));
531 texFormat
= _mesa_choose_texture_format(ctx
, texObj
, target
, 0,
532 internalformat
, GL_NONE
, GL_NONE
);
533 assert(texFormat
!= MESA_FORMAT_NONE
);
534 if (texFormat
== MESA_FORMAT_NONE
) return;
536 newViewNumLevels
= MIN2(numlevels
, origTexObj
->NumLevels
- minlevel
);
537 newViewNumLayers
= MIN2(numlayers
, origTexObj
->NumLayers
- minlayer
);
539 faceTarget
= origTexObj
->Target
;
540 if (faceTarget
== GL_TEXTURE_CUBE_MAP
)
541 faceTarget
= GL_TEXTURE_CUBE_MAP_POSITIVE_X
+ minlayer
;
543 /* Get a reference to what will become this View's base level */
544 origTexImage
= _mesa_select_tex_image(origTexObj
, faceTarget
, minlevel
);
545 width
= origTexImage
->Width
;
546 height
= origTexImage
->Height
;
547 depth
= origTexImage
->Depth
;
549 /* Adjust width, height, depth to be appropriate for new target */
558 case GL_TEXTURE_1D_ARRAY
:
559 height
= (GLsizei
) newViewNumLayers
;
563 case GL_TEXTURE_2D_MULTISAMPLE
:
564 case GL_TEXTURE_RECTANGLE
:
565 case GL_TEXTURE_CUBE_MAP
:
569 case GL_TEXTURE_2D_ARRAY
:
570 case GL_TEXTURE_CUBE_MAP_ARRAY
:
571 case GL_TEXTURE_2D_MULTISAMPLE_ARRAY
:
572 depth
= newViewNumLayers
;
576 /* If the dimensions of the original texture are larger than the maximum
577 * supported dimensions of the new target, the error INVALID_OPERATION is
578 * generated. For example, if the original texture has a TEXTURE_2D_ARRAY
579 * target and its width is greater than MAX_CUBE_MAP_TEXTURE_SIZE, an error
580 * will be generated if TextureView is called to create a TEXTURE_CUBE_MAP
583 dimensionsOK
= _mesa_legal_texture_dimensions(ctx
, target
, 0,
584 width
, height
, depth
, 0);
586 _mesa_error(ctx
, GL_INVALID_OPERATION
,
587 "glTextureView(invalid width or height or depth)");
591 sizeOK
= ctx
->Driver
.TestProxyTexImage(ctx
, target
, 0, texFormat
,
592 width
, height
, depth
, 0);
594 _mesa_error(ctx
, GL_INVALID_OPERATION
,
595 "glTextureView(invalid texture size)");
599 /* If <target> is TEXTURE_1D, TEXTURE_2D, TEXTURE_3D, TEXTURE_RECTANGLE,
600 * or TEXTURE_2D_MULTISAMPLE and <numlayers> does not equal 1, the error
601 * INVALID_VALUE is generated.
607 case GL_TEXTURE_RECTANGLE
:
608 case GL_TEXTURE_2D_MULTISAMPLE
:
609 if (numlayers
!= 1) {
610 _mesa_error(ctx
, GL_INVALID_VALUE
, "glTextureView(numlayers %d != 1)",
616 case GL_TEXTURE_CUBE_MAP
:
617 /* If the new texture's target is TEXTURE_CUBE_MAP, the clamped
618 * <numlayers> must be equal to 6.
620 if (newViewNumLayers
!= 6) {
621 _mesa_error(ctx
, GL_INVALID_VALUE
,
622 "glTextureView(clamped numlayers %d != 6)",
628 case GL_TEXTURE_CUBE_MAP_ARRAY
:
629 /* If the new texture's target is TEXTURE_CUBE_MAP_ARRAY,
630 * then <numlayers> counts layer-faces rather than layers,
631 * and the clamped <numlayers> must be a multiple of 6.
632 * Otherwise, the error INVALID_VALUE is generated.
634 if ((newViewNumLayers
% 6) != 0) {
635 _mesa_error(ctx
, GL_INVALID_VALUE
,
636 "glTextureView(clamped numlayers %d is not"
644 /* If the new texture's target is TEXTURE_CUBE_MAP or
645 * TEXTURE_CUBE_MAP_ARRAY, the width and height of the original texture's
646 * levels must be equal otherwise the error INVALID_OPERATION is generated.
648 if ((target
== GL_TEXTURE_CUBE_MAP
|| target
== GL_TEXTURE_CUBE_MAP_ARRAY
) &&
649 (origTexImage
->Width
!= origTexImage
->Height
)) {
650 _mesa_error(ctx
, GL_INVALID_OPERATION
,
651 "glTextureView(origtexture width (%d) != height (%d))",
652 origTexImage
->Width
, origTexImage
->Height
);
656 /* When the original texture's target is TEXTURE_CUBE_MAP, the layer
657 * parameters are interpreted in the same order as if it were a
658 * TEXTURE_CUBE_MAP_ARRAY with 6 layer-faces.
661 /* If the internal format does not exactly match the internal format of the
662 * original texture, the contents of the memory are reinterpreted in the
663 * same manner as for image bindings described in
664 * section 3.9.20 (Texture Image Loads and Stores).
667 /* TEXTURE_BASE_LEVEL and TEXTURE_MAX_LEVEL are interpreted
668 * relative to the view and not relative to the original data store.
671 if (!initialize_texture_fields(ctx
, target
, texObj
, newViewNumLevels
,
672 width
, height
, depth
,
673 internalformat
, texFormat
)) {
674 return; /* Already recorded error */
677 texObj
->MinLevel
= newViewMinLevel
;
678 texObj
->MinLayer
= newViewMinLayer
;
679 texObj
->NumLevels
= newViewNumLevels
;
680 texObj
->NumLayers
= newViewNumLayers
;
681 texObj
->Immutable
= GL_TRUE
;
682 texObj
->ImmutableLevels
= origTexObj
->ImmutableLevels
;
683 texObj
->Target
= target
;
685 if (ctx
->Driver
.TextureView
!= NULL
&&
686 !ctx
->Driver
.TextureView(ctx
, texObj
, origTexObj
)) {
687 return; /* driver recorded error */