1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2015 Intel Corporation. All Rights Reserved.
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
17 * OR 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
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Jason Ekstrand <jason.ekstrand@intel.com>
26 */
27
28 #include "blend.h"
29 #include "bufferobj.h"
30 #include "buffers.h"
31 #include "clear.h"
32 #include "fbobject.h"
33 #include "framebuffer.h"
34 #include "glformats.h"
35 #include "glheader.h"
36 #include "image.h"
37 #include "macros.h"
38 #include "meta.h"
39 #include "pbo.h"
40 #include "readpix.h"
41 #include "shaderapi.h"
42 #include "state.h"
43 #include "teximage.h"
44 #include "texobj.h"
45 #include "texstate.h"
46 #include "uniforms.h"
47 #include "varray.h"
48
49 static bool
need_signed_unsigned_int_conversion(mesa_format mesaFormat,GLenum format,GLenum type)50 need_signed_unsigned_int_conversion(mesa_format mesaFormat,
51 GLenum format, GLenum type)
52 {
53 const GLenum mesaFormatType = _mesa_get_format_datatype(mesaFormat);
54 const bool is_format_integer = _mesa_is_enum_format_integer(format);
55 return (mesaFormatType == GL_INT &&
56 is_format_integer &&
57 (type == GL_UNSIGNED_INT ||
58 type == GL_UNSIGNED_SHORT ||
59 type == GL_UNSIGNED_BYTE)) ||
60 (mesaFormatType == GL_UNSIGNED_INT &&
61 is_format_integer &&
62 (type == GL_INT ||
63 type == GL_SHORT ||
64 type == GL_BYTE));
65 }
66
67 static struct gl_texture_image *
create_texture_for_pbo(struct gl_context * ctx,bool create_pbo,GLenum pbo_target,int dims,int width,int height,int depth,GLenum format,GLenum type,const void * pixels,const struct gl_pixelstore_attrib * packing,struct gl_buffer_object ** tmp_pbo,GLuint * tmp_tex)68 create_texture_for_pbo(struct gl_context *ctx,
69 bool create_pbo, GLenum pbo_target,
70 int dims, int width, int height, int depth,
71 GLenum format, GLenum type, const void *pixels,
72 const struct gl_pixelstore_attrib *packing,
73 struct gl_buffer_object **tmp_pbo, GLuint *tmp_tex)
74 {
75 uint32_t pbo_format;
76 GLenum internal_format;
77 unsigned row_stride;
78 struct gl_buffer_object *buffer_obj;
79 struct gl_texture_object *tex_obj;
80 struct gl_texture_image *tex_image;
81 bool read_only;
82
83 if (packing->SwapBytes ||
84 packing->LsbFirst ||
85 packing->Invert)
86 return NULL;
87
88 pbo_format = _mesa_format_from_format_and_type(format, type);
89 if (_mesa_format_is_mesa_array_format(pbo_format))
90 pbo_format = _mesa_format_from_array_format(pbo_format);
91
92 if (!pbo_format || !ctx->TextureFormatSupported[pbo_format])
93 return NULL;
94
95 /* Account for SKIP_PIXELS, SKIP_ROWS, ALIGNMENT, and SKIP_IMAGES */
96 uint32_t first_pixel = _mesa_image_offset(dims, packing, width, height,
97 format, type,
98 0, 0, 0);
99 uint32_t last_pixel = _mesa_image_offset(dims, packing, width, height,
100 format, type,
101 depth-1, height-1, width);
102 row_stride = _mesa_image_row_stride(packing, width, format, type);
103
104 if (_mesa_is_bufferobj(packing->BufferObj)) {
105 *tmp_pbo = NULL;
106 buffer_obj = packing->BufferObj;
107 first_pixel += (intptr_t)pixels;
108 } else {
109 bool is_pixel_pack = pbo_target == GL_PIXEL_PACK_BUFFER;
110
111 assert(create_pbo);
112
113 *tmp_pbo = ctx->Driver.NewBufferObject(ctx, 0xDEADBEEF);
114 if (*tmp_pbo == NULL)
115 return NULL;
116
117 /* In case of GL_PIXEL_PACK_BUFFER, pass null pointer for the pixel
118 * data to avoid unnecessary data copying in _mesa_buffer_data.
119 */
120 if (is_pixel_pack)
121 _mesa_buffer_data(ctx, *tmp_pbo, GL_NONE,
122 last_pixel - first_pixel,
123 NULL,
124 GL_STREAM_READ,
125 __func__);
126 else
127 _mesa_buffer_data(ctx, *tmp_pbo, GL_NONE,
128 last_pixel - first_pixel,
129 (char *)pixels + first_pixel,
130 GL_STREAM_DRAW,
131 __func__);
132
133 buffer_obj = *tmp_pbo;
134 first_pixel = 0;
135 }
136
137 _mesa_GenTextures(1, tmp_tex);
138 tex_obj = _mesa_lookup_texture(ctx, *tmp_tex);
139 _mesa_initialize_texture_object(ctx, tex_obj, *tmp_tex, GL_TEXTURE_2D);
140 /* This must be set after _mesa_initialize_texture_object, not before. */
141 tex_obj->Immutable = GL_TRUE;
142 /* This is required for interactions with ARB_texture_view. */
143 tex_obj->NumLayers = 1;
144
145 internal_format = _mesa_get_format_base_format(pbo_format);
146
147 /* The texture is addressed as a single very-tall image, so we
148 * need to pack the multiple image depths together taking the
149 * inter-image padding into account.
150 */
151 int image_height = packing->ImageHeight == 0 ? height : packing->ImageHeight;
152 int full_height = image_height * (depth - 1) + height;
153
154 tex_image = _mesa_get_tex_image(ctx, tex_obj, tex_obj->Target, 0);
155 _mesa_init_teximage_fields(ctx, tex_image, width, full_height, 1,
156 0, internal_format, pbo_format);
157
158 read_only = pbo_target == GL_PIXEL_UNPACK_BUFFER;
159 if (!ctx->Driver.SetTextureStorageForBufferObject(ctx, tex_obj,
160 buffer_obj,
161 first_pixel,
162 row_stride,
163 read_only)) {
164 _mesa_DeleteTextures(1, tmp_tex);
165 _mesa_reference_buffer_object(ctx, tmp_pbo, NULL);
166 return NULL;
167 }
168
169 return tex_image;
170 }
171
172 bool
_mesa_meta_pbo_TexSubImage(struct gl_context * ctx,GLuint dims,struct gl_texture_image * tex_image,int xoffset,int yoffset,int zoffset,int width,int height,int depth,GLenum format,GLenum type,const void * pixels,bool create_pbo,const struct gl_pixelstore_attrib * packing)173 _mesa_meta_pbo_TexSubImage(struct gl_context *ctx, GLuint dims,
174 struct gl_texture_image *tex_image,
175 int xoffset, int yoffset, int zoffset,
176 int width, int height, int depth,
177 GLenum format, GLenum type, const void *pixels,
178 bool create_pbo,
179 const struct gl_pixelstore_attrib *packing)
180 {
181 struct gl_buffer_object *pbo = NULL;
182 GLuint pbo_tex = 0;
183 struct gl_framebuffer *readFb = NULL;
184 struct gl_framebuffer *drawFb = NULL;
185 int image_height;
186 struct gl_texture_image *pbo_tex_image;
187 GLenum status;
188 bool success = false;
189 int z;
190
191 if (!_mesa_is_bufferobj(packing->BufferObj) &&
192 (!create_pbo || pixels == NULL))
193 return false;
194
195 if (format == GL_DEPTH_COMPONENT ||
196 format == GL_DEPTH_STENCIL ||
197 format == GL_STENCIL_INDEX ||
198 format == GL_COLOR_INDEX)
199 return false;
200
201 if (ctx->_ImageTransferState)
202 return false;
203
204 /* This function rely on BlitFramebuffer to fill in the pixel data for
205 * glTex[Sub]Image*D. But, BlitFrameBuffer doesn't support signed to
206 * unsigned or unsigned to signed integer conversions.
207 */
208 if (need_signed_unsigned_int_conversion(tex_image->TexFormat, format, type))
209 return false;
210
211 /* For arrays, use a tall (height * depth) 2D texture but taking into
212 * account the inter-image padding specified with the image height packing
213 * property.
214 */
215 image_height = packing->ImageHeight == 0 ? height : packing->ImageHeight;
216
217 _mesa_meta_begin(ctx, ~(MESA_META_PIXEL_TRANSFER |
218 MESA_META_PIXEL_STORE));
219
220 pbo_tex_image = create_texture_for_pbo(ctx, create_pbo,
221 GL_PIXEL_UNPACK_BUFFER,
222 dims, width, height, depth,
223 format, type, pixels, packing,
224 &pbo, &pbo_tex);
225 if (!pbo_tex_image) {
226 _mesa_meta_end(ctx);
227 return false;
228 }
229
230 readFb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF);
231 if (readFb == NULL)
232 goto fail;
233
234 drawFb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF);
235 if (drawFb == NULL)
236 goto fail;
237
238 _mesa_bind_framebuffers(ctx, drawFb, readFb);
239
240 if (tex_image->TexObject->Target == GL_TEXTURE_1D_ARRAY) {
241 assert(depth == 1);
242 assert(zoffset == 0);
243 depth = height;
244 height = 1;
245 image_height = 1;
246 zoffset = yoffset;
247 yoffset = 0;
248 }
249
250 _mesa_meta_framebuffer_texture_image(ctx, ctx->ReadBuffer,
251 GL_COLOR_ATTACHMENT0,
252 pbo_tex_image, 0);
253 /* If this passes on the first layer it should pass on the others */
254 status = _mesa_check_framebuffer_status(ctx, ctx->ReadBuffer);
255 if (status != GL_FRAMEBUFFER_COMPLETE)
256 goto fail;
257
258 _mesa_meta_framebuffer_texture_image(ctx, ctx->DrawBuffer,
259 GL_COLOR_ATTACHMENT0,
260 tex_image, zoffset);
261 /* If this passes on the first layer it should pass on the others */
262 status = _mesa_check_framebuffer_status(ctx, ctx->DrawBuffer);
263 if (status != GL_FRAMEBUFFER_COMPLETE)
264 goto fail;
265
266 /* Explicitly disable sRGB encoding */
267 ctx->DrawBuffer->Visual.sRGBCapable = false;
268
269 _mesa_update_state(ctx);
270
271 if (_mesa_meta_BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer,
272 0, 0, width, height,
273 xoffset, yoffset,
274 xoffset + width, yoffset + height,
275 GL_COLOR_BUFFER_BIT, GL_NEAREST))
276 goto fail;
277
278 for (z = 1; z < depth; z++) {
279 _mesa_meta_framebuffer_texture_image(ctx, ctx->DrawBuffer,
280 GL_COLOR_ATTACHMENT0,
281 tex_image, zoffset + z);
282
283 _mesa_update_state(ctx);
284
285 _mesa_meta_BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer,
286 0, z * image_height,
287 width, z * image_height + height,
288 xoffset, yoffset,
289 xoffset + width, yoffset + height,
290 GL_COLOR_BUFFER_BIT, GL_NEAREST);
291 }
292
293 success = true;
294
295 fail:
296 _mesa_reference_framebuffer(&readFb, NULL);
297 _mesa_reference_framebuffer(&drawFb, NULL);
298 _mesa_DeleteTextures(1, &pbo_tex);
299 _mesa_reference_buffer_object(ctx, &pbo, NULL);
300
301 _mesa_meta_end(ctx);
302
303 return success;
304 }
305
306 bool
_mesa_meta_pbo_GetTexSubImage(struct gl_context * ctx,GLuint dims,struct gl_texture_image * tex_image,int xoffset,int yoffset,int zoffset,int width,int height,int depth,GLenum format,GLenum type,const void * pixels,const struct gl_pixelstore_attrib * packing)307 _mesa_meta_pbo_GetTexSubImage(struct gl_context *ctx, GLuint dims,
308 struct gl_texture_image *tex_image,
309 int xoffset, int yoffset, int zoffset,
310 int width, int height, int depth,
311 GLenum format, GLenum type, const void *pixels,
312 const struct gl_pixelstore_attrib *packing)
313 {
314 struct gl_buffer_object *pbo = NULL;
315 GLuint pbo_tex = 0;
316 struct gl_framebuffer *readFb;
317 struct gl_framebuffer *drawFb;
318 int image_height;
319 struct gl_texture_image *pbo_tex_image;
320 struct gl_renderbuffer *rb = NULL;
321 GLenum dstBaseFormat = _mesa_unpack_format_to_base_format(format);
322 GLenum status, src_base_format;
323 bool success = false, clear_channels_to_zero = false;
324 float save_clear_color[4];
325 int z;
326
327 if (!_mesa_is_bufferobj(packing->BufferObj))
328 return false;
329
330 if (format == GL_DEPTH_COMPONENT ||
331 format == GL_DEPTH_STENCIL ||
332 format == GL_STENCIL_INDEX ||
333 format == GL_COLOR_INDEX)
334 return false;
335
336 /* Don't use meta path for readpixels in below conditions. */
337 if (!tex_image) {
338 rb = ctx->ReadBuffer->_ColorReadBuffer;
339
340 /* _mesa_get_readpixels_transfer_ops() includes the cases of read
341 * color clamping along with the ctx->_ImageTransferState.
342 */
343 if (_mesa_get_readpixels_transfer_ops(ctx, rb->Format, format,
344 type, GL_FALSE))
345 return false;
346
347 if (_mesa_need_rgb_to_luminance_conversion(rb->_BaseFormat,
348 dstBaseFormat))
349 return false;
350
351 /* This function rely on BlitFramebuffer to fill in the pixel data for
352 * ReadPixels. But, BlitFrameBuffer doesn't support signed to unsigned
353 * or unsigned to signed integer conversions. OpenGL spec expects an
354 * invalid operation in that case.
355 */
356 if (need_signed_unsigned_int_conversion(rb->Format, format, type))
357 return false;
358 } else {
359 if (need_signed_unsigned_int_conversion(tex_image->TexFormat, format, type))
360 return false;
361 }
362
363 /* For arrays, use a tall (height * depth) 2D texture but taking into
364 * account the inter-image padding specified with the image height packing
365 * property.
366 */
367 image_height = packing->ImageHeight == 0 ? height : packing->ImageHeight;
368
369 _mesa_meta_begin(ctx, ~(MESA_META_PIXEL_TRANSFER |
370 MESA_META_PIXEL_STORE));
371
372 pbo_tex_image = create_texture_for_pbo(ctx, false, GL_PIXEL_PACK_BUFFER,
373 dims, width, height, depth,
374 format, type, pixels, packing,
375 &pbo, &pbo_tex);
376
377 if (!pbo_tex_image) {
378 _mesa_meta_end(ctx);
379 return false;
380 }
381
382 /* GL_CLAMP_FRAGMENT_COLOR doesn't affect ReadPixels and GettexImage */
383 if (ctx->Extensions.ARB_color_buffer_float)
384 _mesa_ClampColor(GL_CLAMP_FRAGMENT_COLOR, GL_FALSE);
385
386 readFb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF);
387 if (readFb == NULL)
388 goto fail;
389
390 drawFb = ctx->Driver.NewFramebuffer(ctx, 0xDEADBEEF);
391 if (drawFb == NULL)
392 goto fail;
393
394 if (tex_image && tex_image->TexObject->Target == GL_TEXTURE_1D_ARRAY) {
395 assert(depth == 1);
396 assert(zoffset == 0);
397 depth = height;
398 height = 1;
399 image_height = 1;
400 zoffset = yoffset;
401 yoffset = 0;
402 }
403
404 /* If we were given a texture, bind it to the read framebuffer. If not,
405 * we're doing a ReadPixels and we should just use whatever framebuffer
406 * the client has bound.
407 */
408 _mesa_bind_framebuffers(ctx, drawFb, tex_image ? readFb : ctx->ReadBuffer);
409 if (tex_image) {
410 _mesa_meta_framebuffer_texture_image(ctx, ctx->ReadBuffer,
411 GL_COLOR_ATTACHMENT0,
412 tex_image, zoffset);
413 /* If this passes on the first layer it should pass on the others */
414 status = _mesa_check_framebuffer_status(ctx, ctx->ReadBuffer);
415 if (status != GL_FRAMEBUFFER_COMPLETE)
416 goto fail;
417 } else {
418 assert(depth == 1);
419 }
420
421 _mesa_meta_framebuffer_texture_image(ctx, ctx->DrawBuffer,
422 GL_COLOR_ATTACHMENT0,
423 pbo_tex_image, 0);
424 /* If this passes on the first layer it should pass on the others */
425 status = _mesa_check_framebuffer_status(ctx, ctx->DrawBuffer);
426 if (status != GL_FRAMEBUFFER_COMPLETE)
427 goto fail;
428
429 /* Explicitly disable sRGB encoding */
430 ctx->DrawBuffer->Visual.sRGBCapable = false;
431
432 _mesa_update_state(ctx);
433
434 if (_mesa_meta_BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer,
435 xoffset, yoffset,
436 xoffset + width, yoffset + height,
437 0, 0, width, height,
438 GL_COLOR_BUFFER_BIT, GL_NEAREST))
439 goto fail;
440
441 src_base_format = tex_image ?
442 tex_image->_BaseFormat :
443 ctx->ReadBuffer->_ColorReadBuffer->_BaseFormat;
444
445 /* Depending on the base formats involved we might need to rebase some
446 * values. For example if we download from a Luminance format to RGBA
447 * format, we want G=0 and B=0.
448 */
449 clear_channels_to_zero =
450 _mesa_need_luminance_to_rgb_conversion(src_base_format,
451 pbo_tex_image->_BaseFormat);
452
453 if (clear_channels_to_zero) {
454 memcpy(save_clear_color, ctx->Color.ClearColor.f, 4 * sizeof(float));
455 /* Clear the Green, Blue channels. */
456 _mesa_ColorMask(GL_FALSE, GL_TRUE, GL_TRUE,
457 src_base_format != GL_LUMINANCE_ALPHA);
458 _mesa_ClearColor(0.0, 0.0, 0.0, 1.0);
459 _mesa_Clear(GL_COLOR_BUFFER_BIT);
460 }
461
462 for (z = 1; z < depth; z++) {
463 _mesa_meta_framebuffer_texture_image(ctx, ctx->ReadBuffer,
464 GL_COLOR_ATTACHMENT0,
465 tex_image, zoffset + z);
466
467 _mesa_update_state(ctx);
468
469 _mesa_meta_BlitFramebuffer(ctx, ctx->ReadBuffer, ctx->DrawBuffer,
470 xoffset, yoffset,
471 xoffset + width, yoffset + height,
472 0, z * image_height,
473 width, z * image_height + height,
474 GL_COLOR_BUFFER_BIT, GL_NEAREST);
475 if (clear_channels_to_zero)
476 _mesa_Clear(GL_COLOR_BUFFER_BIT);
477 }
478
479 /* Unmask the color channels and restore the saved clear color values. */
480 if (clear_channels_to_zero) {
481 _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
482 _mesa_ClearColor(save_clear_color[0], save_clear_color[1],
483 save_clear_color[2], save_clear_color[3]);
484 }
485
486 success = true;
487
488 fail:
489 _mesa_reference_framebuffer(&drawFb, NULL);
490 _mesa_reference_framebuffer(&readFb, NULL);
491 _mesa_DeleteTextures(1, &pbo_tex);
492 _mesa_reference_buffer_object(ctx, &pbo, NULL);
493
494 _mesa_meta_end(ctx);
495
496 return success;
497 }
498