projects / mesa.git / blob
? search:


9cace2b245afbbb3c336e6e66d9782b8c577f5ea
[mesa.git] / src / mesa / drivers / common / meta_blit.c
1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2009 VMware, Inc. 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
25 #include "main/glheader.h"
26 #include "main/mtypes.h"
27 #include "main/imports.h"
28 #include "main/arbprogram.h"
29 #include "main/arrayobj.h"
30 #include "main/blend.h"
31 #include "main/condrender.h"
32 #include "main/depth.h"
33 #include "main/enable.h"
34 #include "main/enums.h"
35 #include "main/fbobject.h"
36 #include "main/image.h"
37 #include "main/macros.h"
38 #include "main/matrix.h"
39 #include "main/multisample.h"
40 #include "main/objectlabel.h"
41 #include "main/readpix.h"
42 #include "main/scissor.h"
43 #include "main/shaderapi.h"
44 #include "main/texobj.h"
45 #include "main/texenv.h"
46 #include "main/teximage.h"
47 #include "main/texparam.h"
48 #include "main/uniforms.h"
49 #include "main/varray.h"
50 #include "main/viewport.h"
51 #include "swrast/swrast.h"
52 #include "drivers/common/meta.h"
53 #include "util/ralloc.h"
54
55 /** Return offset in bytes of the field within a vertex struct */
56 #define OFFSET(FIELD) ((void *) offsetof(struct vertex, FIELD))
57
58 static void
59 setup_glsl_msaa_blit_scaled_shader(struct gl_context *ctx,
60 struct blit_state *blit,
61 struct gl_renderbuffer *src_rb,
62 GLenum target, GLenum filter)
63 {
64 GLint loc_src_width, loc_src_height;
65 int i, samples;
66 int shader_offset = 0;
67 void *mem_ctx = ralloc_context(NULL);
68 char *fs_source;
69 char *name, *sample_number;
70 const uint8_t *sample_map;
71 char *sample_map_str = rzalloc_size(mem_ctx, 1);
72 char *sample_map_expr = rzalloc_size(mem_ctx, 1);
73 char *texel_fetch_macro = rzalloc_size(mem_ctx, 1);
74 const char *vs_source;
75 const char *sampler_array_suffix = "";
76 const char *texcoord_type = "vec2";
77 float y_scale;
78 enum blit_msaa_shader shader_index;
79
80 assert(src_rb);
81 samples = MAX2(src_rb->NumSamples, 1);
82 y_scale = samples * 0.5;
83
84 /* We expect only power of 2 samples in source multisample buffer. */
85 assert(samples > 0 && is_power_of_two(samples));
86 while (samples >> (shader_offset + 1)) {
87 shader_offset++;
88 }
89 /* Update the assert if we plan to support more than 8X MSAA. */
90 assert(shader_offset > 0 && shader_offset < 4);
91
92 assert(target == GL_TEXTURE_2D_MULTISAMPLE ||
93 target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY);
94
95 shader_index = BLIT_2X_MSAA_SHADER_2D_MULTISAMPLE_SCALED_RESOLVE +
96 shader_offset - 1;
97
98 if (target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) {
99 shader_index += BLIT_2X_MSAA_SHADER_2D_MULTISAMPLE_ARRAY_SCALED_RESOLVE -
100 BLIT_2X_MSAA_SHADER_2D_MULTISAMPLE_SCALED_RESOLVE;
101 sampler_array_suffix = "Array";
102 texcoord_type = "vec3";
103 }
104
105 if (blit->msaa_shaders[shader_index]) {
106 _mesa_UseProgram(blit->msaa_shaders[shader_index]);
107 /* Update the uniform values. */
108 loc_src_width =
109 _mesa_GetUniformLocation(blit->msaa_shaders[shader_index], "src_width");
110 loc_src_height =
111 _mesa_GetUniformLocation(blit->msaa_shaders[shader_index], "src_height");
112 _mesa_Uniform1f(loc_src_width, src_rb->Width);
113 _mesa_Uniform1f(loc_src_height, src_rb->Height);
114 return;
115 }
116
117 name = ralloc_asprintf(mem_ctx, "vec4 MSAA scaled resolve");
118
119 /* Below switch is used to setup the shader expression, which computes
120 * sample index and map it to to a sample number on hardware.
121 */
122 switch(samples) {
123 case 2:
124 sample_number = "sample_map[int(2 * fract(coord.x))]";
125 sample_map = ctx->Const.SampleMap2x;
126 break;
127 case 4:
128 sample_number = "sample_map[int(2 * fract(coord.x) + 4 * fract(coord.y))]";
129 sample_map = ctx->Const.SampleMap4x;
130 break;
131 case 8:
132 sample_number = "sample_map[int(2 * fract(coord.x) + 8 * fract(coord.y))]";
133 sample_map = ctx->Const.SampleMap8x;
134 break;
135 default:
136 sample_number = NULL;
137 sample_map = NULL;
138 _mesa_problem(ctx, "Unsupported sample count %d\n", samples);
139 unreachable("Unsupported sample count");
140 }
141
142 /* Create sample map string. */
143 for (i = 0 ; i < samples - 1; i++) {
144 ralloc_asprintf_append(&sample_map_str, "%d, ", sample_map[i]);
145 }
146 ralloc_asprintf_append(&sample_map_str, "%d", sample_map[samples - 1]);
147
148 /* Create sample map expression using above string. */
149 ralloc_asprintf_append(&sample_map_expr,
150 " const int sample_map[%d] = int[%d](%s);\n",
151 samples, samples, sample_map_str);
152
153 ralloc_asprintf_append(&texel_fetch_macro,
154 "#define TEXEL_FETCH(coord) texelFetch(texSampler, i%s(coord), %s);\n",
155 texcoord_type, sample_number);
156
157 vs_source = ralloc_asprintf(mem_ctx,
158 "#version 130\n"
159 "in vec2 position;\n"
160 "in %s textureCoords;\n"
161 "out %s texCoords;\n"
162 "void main()\n"
163 "{\n"
164 " texCoords = textureCoords;\n"
165 " gl_Position = vec4(position, 0.0, 1.0);\n"
166 "}\n",
167 texcoord_type,
168 texcoord_type);
169 fs_source = ralloc_asprintf(mem_ctx,
170 "#version 130\n"
171 "#extension GL_ARB_texture_multisample : enable\n"
172 "uniform sampler2DMS%s texSampler;\n"
173 "uniform float src_width, src_height;\n"
174 "in %s texCoords;\n"
175 "out vec4 out_color;\n"
176 "\n"
177 "void main()\n"
178 "{\n"
179 "%s"
180 " vec2 interp;\n"
181 " const vec2 scale = vec2(2.0f, %ff);\n"
182 " const vec2 scale_inv = vec2(0.5f, %ff);\n"
183 " const vec2 s_0_offset = vec2(0.25f, %ff);\n"
184 " vec2 s_0_coord, s_1_coord, s_2_coord, s_3_coord;\n"
185 " vec4 s_0_color, s_1_color, s_2_color, s_3_color;\n"
186 " vec4 x_0_color, x_1_color;\n"
187 " vec2 tex_coord = texCoords - s_0_offset;\n"
188 "\n"
189 " tex_coord *= scale;\n"
190 " clamp(tex_coord.x, 0.0f, scale.x * src_width - 1.0f);\n"
191 " clamp(tex_coord.y, 0.0f, scale.y * src_height - 1.0f);\n"
192 " interp = fract(tex_coord);\n"
193 " tex_coord = ivec2(tex_coord) * scale_inv;\n"
194 "\n"
195 " /* Compute the sample coordinates used for filtering. */\n"
196 " s_0_coord = tex_coord;\n"
197 " s_1_coord = tex_coord + vec2(scale_inv.x, 0.0f);\n"
198 " s_2_coord = tex_coord + vec2(0.0f, scale_inv.y);\n"
199 " s_3_coord = tex_coord + vec2(scale_inv.x, scale_inv.y);\n"
200 "\n"
201 " /* Fetch sample color values. */\n"
202 "%s"
203 " s_0_color = TEXEL_FETCH(s_0_coord)\n"
204 " s_1_color = TEXEL_FETCH(s_1_coord)\n"
205 " s_2_color = TEXEL_FETCH(s_2_coord)\n"
206 " s_3_color = TEXEL_FETCH(s_3_coord)\n"
207 "#undef TEXEL_FETCH\n"
208 "\n"
209 " /* Do bilinear filtering on sample colors. */\n"
210 " x_0_color = mix(s_0_color, s_1_color, interp.x);\n"
211 " x_1_color = mix(s_2_color, s_3_color, interp.x);\n"
212 " out_color = mix(x_0_color, x_1_color, interp.y);\n"
213 "}\n",
214 sampler_array_suffix,
215 texcoord_type,
216 sample_map_expr,
217 y_scale,
218 1.0f / y_scale,
219 1.0f / samples,
220 texel_fetch_macro);
221
222 _mesa_meta_compile_and_link_program(ctx, vs_source, fs_source, name,
223 &blit->msaa_shaders[shader_index]);
224 loc_src_width =
225 _mesa_GetUniformLocation(blit->msaa_shaders[shader_index], "src_width");
226 loc_src_height =
227 _mesa_GetUniformLocation(blit->msaa_shaders[shader_index], "src_height");
228 _mesa_Uniform1f(loc_src_width, src_rb->Width);
229 _mesa_Uniform1f(loc_src_height, src_rb->Height);
230
231 ralloc_free(mem_ctx);
232 }
233
234 static void
235 setup_glsl_msaa_blit_shader(struct gl_context *ctx,
236 struct blit_state *blit,
237 const struct gl_framebuffer *drawFb,
238 struct gl_renderbuffer *src_rb,
239 GLenum target)
240 {
241 const char *vs_source;
242 char *fs_source;
243 void *mem_ctx;
244 enum blit_msaa_shader shader_index;
245 bool dst_is_msaa = false;
246 GLenum src_datatype;
247 const char *vec4_prefix;
248 const char *sampler_array_suffix = "";
249 char *name;
250 const char *texcoord_type = "vec2";
251 int samples;
252 int shader_offset = 0;
253
254 if (src_rb) {
255 samples = MAX2(src_rb->NumSamples, 1);
256 src_datatype = _mesa_get_format_datatype(src_rb->Format);
257 } else {
258 /* depth-or-color glCopyTexImage fallback path that passes a NULL rb and
259 * doesn't handle integer.
260 */
261 samples = 1;
262 src_datatype = GL_UNSIGNED_NORMALIZED;
263 }
264
265 /* We expect only power of 2 samples in source multisample buffer. */
266 assert(samples > 0 && is_power_of_two(samples));
267 while (samples >> (shader_offset + 1)) {
268 shader_offset++;
269 }
270 /* Update the assert if we plan to support more than 16X MSAA. */
271 assert(shader_offset >= 0 && shader_offset <= 4);
272
273 if (drawFb->Visual.samples > 1) {
274 /* If you're calling meta_BlitFramebuffer with the destination
275 * multisampled, this is the only path that will work -- swrast and
276 * CopyTexImage won't work on it either.
277 */
278 assert(ctx->Extensions.ARB_sample_shading);
279
280 dst_is_msaa = true;
281
282 /* We need shader invocation per sample, not per pixel */
283 _mesa_set_enable(ctx, GL_MULTISAMPLE, GL_TRUE);
284 _mesa_set_enable(ctx, GL_SAMPLE_SHADING, GL_TRUE);
285 _mesa_MinSampleShading(1.0);
286 }
287
288 switch (target) {
289 case GL_TEXTURE_2D_MULTISAMPLE:
290 case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
291 if (src_rb && (src_rb->_BaseFormat == GL_DEPTH_COMPONENT ||
292 src_rb->_BaseFormat == GL_DEPTH_STENCIL)) {
293 if (dst_is_msaa)
294 shader_index = BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_COPY;
295 else
296 shader_index = BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_RESOLVE;
297 } else {
298 if (dst_is_msaa)
299 shader_index = BLIT_MSAA_SHADER_2D_MULTISAMPLE_COPY;
300 else {
301 shader_index = BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE +
302 shader_offset;
303 }
304 }
305
306 if (target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) {
307 shader_index += (BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_ARRAY_RESOLVE -
308 BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE);
309 sampler_array_suffix = "Array";
310 texcoord_type = "vec3";
311 }
312 break;
313 default:
314 _mesa_problem(ctx, "Unkown texture target %s\n",
315 _mesa_lookup_enum_by_nr(target));
316 shader_index = BLIT_2X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE;
317 }
318
319 /* We rely on the enum being sorted this way. */
320 STATIC_ASSERT(BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE_INT ==
321 BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE + 5);
322 STATIC_ASSERT(BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE_UINT ==
323 BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE + 10);
324 if (src_datatype == GL_INT) {
325 shader_index += 5;
326 vec4_prefix = "i";
327 } else if (src_datatype == GL_UNSIGNED_INT) {
328 shader_index += 10;
329 vec4_prefix = "u";
330 } else {
331 vec4_prefix = "";
332 }
333
334 if (blit->msaa_shaders[shader_index]) {
335 _mesa_UseProgram(blit->msaa_shaders[shader_index]);
336 return;
337 }
338
339 mem_ctx = ralloc_context(NULL);
340
341 if (shader_index == BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_RESOLVE ||
342 shader_index == BLIT_MSAA_SHADER_2D_MULTISAMPLE_ARRAY_DEPTH_RESOLVE ||
343 shader_index == BLIT_MSAA_SHADER_2D_MULTISAMPLE_ARRAY_DEPTH_COPY ||
344 shader_index == BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_COPY) {
345 char *sample_index;
346 const char *arb_sample_shading_extension_string;
347
348 if (dst_is_msaa) {
349 arb_sample_shading_extension_string = "#extension GL_ARB_sample_shading : enable";
350 sample_index = "gl_SampleID";
351 name = "depth MSAA copy";
352 } else {
353 /* Don't need that extension, since we're drawing to a single-sampled
354 * destination.
355 */
356 arb_sample_shading_extension_string = "";
357 /* From the GL 4.3 spec:
358 *
359 * "If there is a multisample buffer (the value of SAMPLE_BUFFERS
360 * is one), then values are obtained from the depth samples in
361 * this buffer. It is recommended that the depth value of the
362 * centermost sample be used, though implementations may choose
363 * any function of the depth sample values at each pixel.
364 *
365 * We're slacking and instead of choosing centermost, we've got 0.
366 */
367 sample_index = "0";
368 name = "depth MSAA resolve";
369 }
370
371 vs_source = ralloc_asprintf(mem_ctx,
372 "#version 130\n"
373 "in vec2 position;\n"
374 "in %s textureCoords;\n"
375 "out %s texCoords;\n"
376 "void main()\n"
377 "{\n"
378 " texCoords = textureCoords;\n"
379 " gl_Position = vec4(position, 0.0, 1.0);\n"
380 "}\n",
381 texcoord_type,
382 texcoord_type);
383 fs_source = ralloc_asprintf(mem_ctx,
384 "#version 130\n"
385 "#extension GL_ARB_texture_multisample : enable\n"
386 "%s\n"
387 "uniform sampler2DMS%s texSampler;\n"
388 "in %s texCoords;\n"
389 "out vec4 out_color;\n"
390 "\n"
391 "void main()\n"
392 "{\n"
393 " gl_FragDepth = texelFetch(texSampler, i%s(texCoords), %s).r;\n"
394 "}\n",
395 arb_sample_shading_extension_string,
396 sampler_array_suffix,
397 texcoord_type,
398 texcoord_type,
399 sample_index);
400 } else {
401 /* You can create 2D_MULTISAMPLE textures with 0 sample count (meaning 1
402 * sample). Yes, this is ridiculous.
403 */
404 char *sample_resolve;
405 const char *arb_sample_shading_extension_string;
406 const char *merge_function;
407 name = ralloc_asprintf(mem_ctx, "%svec4 MSAA %s",
408 vec4_prefix,
409 dst_is_msaa ? "copy" : "resolve");
410
411 if (dst_is_msaa) {
412 arb_sample_shading_extension_string = "#extension GL_ARB_sample_shading : enable";
413 sample_resolve = ralloc_asprintf(mem_ctx, " out_color = texelFetch(texSampler, i%s(texCoords), gl_SampleID);", texcoord_type);
414 merge_function = "";
415 } else {
416 int i;
417 int step;
418
419 if (src_datatype == GL_INT || src_datatype == GL_UNSIGNED_INT) {
420 merge_function =
421 "gvec4 merge(gvec4 a, gvec4 b) { return (a >> gvec4(1)) + (b >> gvec4(1)) + (a & b & gvec4(1)); }\n";
422 } else {
423 /* The divide will happen at the end for floats. */
424 merge_function =
425 "vec4 merge(vec4 a, vec4 b) { return (a + b); }\n";
426 }
427
428 arb_sample_shading_extension_string = "";
429
430 /* We're assuming power of two samples for this resolution procedure.
431 *
432 * To avoid losing any floating point precision if the samples all
433 * happen to have the same value, we merge pairs of values at a time
434 * (so the floating point exponent just gets increased), rather than
435 * doing a naive sum and dividing.
436 */
437 assert(is_power_of_two(samples));
438 /* Fetch each individual sample. */
439 sample_resolve = rzalloc_size(mem_ctx, 1);
440 for (i = 0; i < samples; i++) {
441 ralloc_asprintf_append(&sample_resolve,
442 " gvec4 sample_1_%d = texelFetch(texSampler, i%s(texCoords), %d);\n",
443 i, texcoord_type, i);
444 }
445 /* Now, merge each pair of samples, then merge each pair of those,
446 * etc.
447 */
448 for (step = 2; step <= samples; step *= 2) {
449 for (i = 0; i < samples; i += step) {
450 ralloc_asprintf_append(&sample_resolve,
451 " gvec4 sample_%d_%d = merge(sample_%d_%d, sample_%d_%d);\n",
452 step, i,
453 step / 2, i,
454 step / 2, i + step / 2);
455 }
456 }
457
458 /* Scale the final result. */
459 if (src_datatype == GL_UNSIGNED_INT || src_datatype == GL_INT) {
460 ralloc_asprintf_append(&sample_resolve,
461 " out_color = sample_%d_0;\n",
462 samples);
463 } else {
464 ralloc_asprintf_append(&sample_resolve,
465 " gl_FragColor = sample_%d_0 / %f;\n",
466 samples, (float)samples);
467 }
468 }
469
470 vs_source = ralloc_asprintf(mem_ctx,
471 "#version 130\n"
472 "in vec2 position;\n"
473 "in %s textureCoords;\n"
474 "out %s texCoords;\n"
475 "void main()\n"
476 "{\n"
477 " texCoords = textureCoords;\n"
478 " gl_Position = vec4(position, 0.0, 1.0);\n"
479 "}\n",
480 texcoord_type,
481 texcoord_type);
482 fs_source = ralloc_asprintf(mem_ctx,
483 "#version 130\n"
484 "#extension GL_ARB_texture_multisample : enable\n"
485 "%s\n"
486 "#define gvec4 %svec4\n"
487 "uniform %ssampler2DMS%s texSampler;\n"
488 "in %s texCoords;\n"
489 "out gvec4 out_color;\n"
490 "\n"
491 "%s" /* merge_function */
492 "void main()\n"
493 "{\n"
494 "%s\n" /* sample_resolve */
495 "}\n",
496 arb_sample_shading_extension_string,
497 vec4_prefix,
498 vec4_prefix,
499 sampler_array_suffix,
500 texcoord_type,
501 merge_function,
502 sample_resolve);
503 }
504
505 _mesa_meta_compile_and_link_program(ctx, vs_source, fs_source, name,
506 &blit->msaa_shaders[shader_index]);
507
508 ralloc_free(mem_ctx);
509 }
510
511 static void
512 setup_glsl_blit_framebuffer(struct gl_context *ctx,
513 struct blit_state *blit,
514 const struct gl_framebuffer *drawFb,
515 struct gl_renderbuffer *src_rb,
516 GLenum target, GLenum filter,
517 bool is_scaled_blit,
518 bool do_depth)
519 {
520 unsigned texcoord_size;
521 bool is_target_multisample = target == GL_TEXTURE_2D_MULTISAMPLE ||
522 target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY;
523 bool is_filter_scaled_resolve = filter == GL_SCALED_RESOLVE_FASTEST_EXT ||
524 filter == GL_SCALED_RESOLVE_NICEST_EXT;
525
526 /* target = GL_TEXTURE_RECTANGLE is not supported in GLES 3.0 */
527 assert(_mesa_is_desktop_gl(ctx) || target == GL_TEXTURE_2D);
528
529 texcoord_size = 2 + (src_rb->Depth > 1 ? 1 : 0);
530
531 _mesa_meta_setup_vertex_objects(&blit->VAO, &blit->VBO, true,
532 2, texcoord_size, 0);
533
534 if (is_target_multisample && is_filter_scaled_resolve && is_scaled_blit) {
535 setup_glsl_msaa_blit_scaled_shader(ctx, blit, src_rb, target, filter);
536 } else if (is_target_multisample) {
537 setup_glsl_msaa_blit_shader(ctx, blit, drawFb, src_rb, target);
538 } else {
539 _mesa_meta_setup_blit_shader(ctx, target, do_depth,
540 do_depth ? &blit->shaders_with_depth
541 : &blit->shaders_without_depth);
542 }
543 }
544
545 /**
546 * Try to do a color or depth glBlitFramebuffer using texturing.
547 *
548 * We can do this when the src renderbuffer is actually a texture, or when the
549 * driver exposes BindRenderbufferTexImage().
550 */
551 static bool
552 blitframebuffer_texture(struct gl_context *ctx,
553 const struct gl_framebuffer *readFb,
554 const struct gl_framebuffer *drawFb,
555 GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
556 GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
557 GLenum filter, GLint flipX, GLint flipY,
558 GLboolean glsl_version, GLboolean do_depth)
559 {
560 int att_index = do_depth ? BUFFER_DEPTH : readFb->_ColorReadBufferIndex;
561 const struct gl_renderbuffer_attachment *readAtt =
562 &readFb->Attachment[att_index];
563 struct blit_state *blit = &ctx->Meta->Blit;
564 struct fb_tex_blit_state fb_tex_blit;
565 const GLint dstX = MIN2(dstX0, dstX1);
566 const GLint dstY = MIN2(dstY0, dstY1);
567 const GLint dstW = abs(dstX1 - dstX0);
568 const GLint dstH = abs(dstY1 - dstY0);
569 const int srcW = abs(srcX1 - srcX0);
570 const int srcH = abs(srcY1 - srcY0);
571 bool scaled_blit = false;
572 struct gl_texture_object *texObj;
573 GLuint srcLevel;
574 GLenum target;
575 struct gl_renderbuffer *rb = readAtt->Renderbuffer;
576 struct temp_texture *meta_temp_texture;
577
578 if (rb->NumSamples && !ctx->Extensions.ARB_texture_multisample)
579 return false;
580
581 _mesa_meta_fb_tex_blit_begin(ctx, &fb_tex_blit);
582
583 if (readAtt->Texture &&
584 (readAtt->Texture->Target == GL_TEXTURE_2D ||
585 readAtt->Texture->Target == GL_TEXTURE_RECTANGLE ||
586 readAtt->Texture->Target == GL_TEXTURE_2D_MULTISAMPLE ||
587 readAtt->Texture->Target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY)) {
588 /* If there's a texture attached of a type we can handle, then just use
589 * it directly.
590 */
591 srcLevel = readAtt->TextureLevel;
592 texObj = readAtt->Texture;
593 target = texObj->Target;
594 } else if (!readAtt->Texture && ctx->Driver.BindRenderbufferTexImage) {
595 if (!_mesa_meta_bind_rb_as_tex_image(ctx, rb, &fb_tex_blit.tempTex,
596 &texObj, &target))
597 return false;
598
599 srcLevel = 0;
600 if (_mesa_is_winsys_fbo(readFb)) {
601 GLint temp = srcY0;
602 srcY0 = rb->Height - srcY1;
603 srcY1 = rb->Height - temp;
604 flipY = -flipY;
605 }
606 } else {
607 GLenum tex_base_format;
608 /* Fall back to doing a CopyTexSubImage to get the destination
609 * renderbuffer into a texture.
610 */
611 if (ctx->Meta->Blit.no_ctsi_fallback)
612 return false;
613
614 if (rb->NumSamples > 1)
615 return false;
616
617 if (do_depth) {
618 meta_temp_texture = _mesa_meta_get_temp_depth_texture(ctx);
619 tex_base_format = GL_DEPTH_COMPONENT;
620 } else {
621 meta_temp_texture = _mesa_meta_get_temp_texture(ctx);
622 tex_base_format =
623 _mesa_base_tex_format(ctx, rb->InternalFormat);
624 }
625
626 srcLevel = 0;
627 target = meta_temp_texture->Target;
628 texObj = _mesa_lookup_texture(ctx, meta_temp_texture->TexObj);
629 if (texObj == NULL) {
630 return false;
631 }
632
633 _mesa_meta_setup_copypix_texture(ctx, meta_temp_texture,
634 srcX0, srcY0,
635 srcW, srcH,
636 tex_base_format,
637 filter);
638
639
640 srcX0 = 0;
641 srcY0 = 0;
642 srcX1 = srcW;
643 srcY1 = srcH;
644 }
645
646 fb_tex_blit.baseLevelSave = texObj->BaseLevel;
647 fb_tex_blit.maxLevelSave = texObj->MaxLevel;
648 fb_tex_blit.stencilSamplingSave = texObj->StencilSampling;
649
650 scaled_blit = dstW != srcW || dstH != srcH;
651
652 if (glsl_version) {
653 setup_glsl_blit_framebuffer(ctx, blit, drawFb, rb, target, filter, scaled_blit,
654 do_depth);
655 }
656 else {
657 _mesa_meta_setup_ff_tnl_for_blit(&ctx->Meta->Blit.VAO,
658 &ctx->Meta->Blit.VBO,
659 2);
660 }
661
662 /*
663 printf("Blit from texture!\n");
664 printf(" srcAtt %p dstAtt %p\n", readAtt, drawAtt);
665 printf(" srcTex %p dstText %p\n", texObj, drawAtt->Texture);
666 */
667
668 fb_tex_blit.sampler = _mesa_meta_setup_sampler(ctx, texObj, target, filter,
669 srcLevel);
670
671 /* Always do our blits with no net sRGB decode or encode.
672 *
673 * However, if both the src and dst can be srgb decode/encoded, enable them
674 * so that we do any blending (from scaling or from MSAA resolves) in the
675 * right colorspace.
676 *
677 * Our choice of not doing any net encode/decode is from the GL 3.0
678 * specification:
679 *
680 * "Blit operations bypass the fragment pipeline. The only fragment
681 * operations which affect a blit are the pixel ownership test and the
682 * scissor test."
683 *
684 * The GL 4.4 specification disagrees and says that the sRGB part of the
685 * fragment pipeline applies, but this was found to break applications.
686 */
687 if (ctx->Extensions.EXT_texture_sRGB_decode) {
688 if (_mesa_get_format_color_encoding(rb->Format) == GL_SRGB &&
689 drawFb->Visual.sRGBCapable) {
690 _mesa_SamplerParameteri(fb_tex_blit.sampler,
691 GL_TEXTURE_SRGB_DECODE_EXT, GL_DECODE_EXT);
692 _mesa_set_framebuffer_srgb(ctx, GL_TRUE);
693 } else {
694 _mesa_SamplerParameteri(fb_tex_blit.sampler,
695 GL_TEXTURE_SRGB_DECODE_EXT,
696 GL_SKIP_DECODE_EXT);
697 /* set_framebuffer_srgb was set by _mesa_meta_begin(). */
698 }
699 }
700
701 if (!glsl_version) {
702 _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
703 _mesa_set_enable(ctx, target, GL_TRUE);
704 }
705
706 /* Prepare vertex data (the VBO was previously created and bound) */
707 {
708 struct vertex verts[4];
709 GLfloat s0, t0, s1, t1;
710
711 if (target == GL_TEXTURE_2D) {
712 const struct gl_texture_image *texImage
713 = _mesa_select_tex_image(texObj, target, srcLevel);
714 s0 = srcX0 / (float) texImage->Width;
715 s1 = srcX1 / (float) texImage->Width;
716 t0 = srcY0 / (float) texImage->Height;
717 t1 = srcY1 / (float) texImage->Height;
718 }
719 else {
720 assert(target == GL_TEXTURE_RECTANGLE_ARB ||
721 target == GL_TEXTURE_2D_MULTISAMPLE ||
722 target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY);
723 s0 = (float) srcX0;
724 s1 = (float) srcX1;
725 t0 = (float) srcY0;
726 t1 = (float) srcY1;
727 }
728
729 /* Silence valgrind warnings about reading uninitialized stack. */
730 memset(verts, 0, sizeof(verts));
731
732 /* setup vertex positions */
733 verts[0].x = -1.0F * flipX;
734 verts[0].y = -1.0F * flipY;
735 verts[1].x = 1.0F * flipX;
736 verts[1].y = -1.0F * flipY;
737 verts[2].x = 1.0F * flipX;
738 verts[2].y = 1.0F * flipY;
739 verts[3].x = -1.0F * flipX;
740 verts[3].y = 1.0F * flipY;
741
742 verts[0].tex[0] = s0;
743 verts[0].tex[1] = t0;
744 verts[0].tex[2] = readAtt->Zoffset;
745 verts[1].tex[0] = s1;
746 verts[1].tex[1] = t0;
747 verts[1].tex[2] = readAtt->Zoffset;
748 verts[2].tex[0] = s1;
749 verts[2].tex[1] = t1;
750 verts[2].tex[2] = readAtt->Zoffset;
751 verts[3].tex[0] = s0;
752 verts[3].tex[1] = t1;
753 verts[3].tex[2] = readAtt->Zoffset;
754
755 _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
756 }
757
758 /* setup viewport */
759 _mesa_set_viewport(ctx, 0, dstX, dstY, dstW, dstH);
760 _mesa_ColorMask(!do_depth, !do_depth, !do_depth, !do_depth);
761 _mesa_set_enable(ctx, GL_DEPTH_TEST, do_depth);
762 _mesa_DepthMask(do_depth);
763 _mesa_DepthFunc(GL_ALWAYS);
764
765 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
766 _mesa_meta_fb_tex_blit_end(ctx, target, &fb_tex_blit);
767
768 return true;
769 }
770
771 void
772 _mesa_meta_fb_tex_blit_begin(const struct gl_context *ctx,
773 struct fb_tex_blit_state *blit)
774 {
775 blit->samplerSave =
776 ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ?
777 ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0;
778 blit->tempTex = 0;
779 }
780
781 void
782 _mesa_meta_fb_tex_blit_end(struct gl_context *ctx, GLenum target,
783 struct fb_tex_blit_state *blit)
784 {
785 /* Restore texture object state, the texture binding will
786 * be restored by _mesa_meta_end().
787 */
788 if (target != GL_TEXTURE_RECTANGLE_ARB) {
789 _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, blit->baseLevelSave);
790 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, blit->maxLevelSave);
791
792 if (ctx->Extensions.ARB_stencil_texturing) {
793 const struct gl_texture_object *texObj =
794 _mesa_get_current_tex_object(ctx, target);
795
796 if (texObj->StencilSampling != blit->stencilSamplingSave)
797 _mesa_TexParameteri(target, GL_DEPTH_STENCIL_TEXTURE_MODE,
798 blit->stencilSamplingSave ?
799 GL_STENCIL_INDEX : GL_DEPTH_COMPONENT);
800 }
801 }
802
803 _mesa_BindSampler(ctx->Texture.CurrentUnit, blit->samplerSave);
804 _mesa_DeleteSamplers(1, &blit->sampler);
805 if (blit->tempTex)
806 _mesa_DeleteTextures(1, &blit->tempTex);
807 }
808
809 GLboolean
810 _mesa_meta_bind_rb_as_tex_image(struct gl_context *ctx,
811 struct gl_renderbuffer *rb,
812 GLuint *tex,
813 struct gl_texture_object **texObj,
814 GLenum *target)
815 {
816 struct gl_texture_image *texImage;
817 GLuint tempTex;
818
819 if (rb->NumSamples > 1)
820 *target = GL_TEXTURE_2D_MULTISAMPLE;
821 else
822 *target = GL_TEXTURE_2D;
823
824 tempTex = 0;
825 _mesa_GenTextures(1, &tempTex);
826 if (tempTex == 0)
827 return false;
828
829 *tex = tempTex;
830
831 _mesa_BindTexture(*target, *tex);
832 *texObj = _mesa_lookup_texture(ctx, *tex);
833 texImage = _mesa_get_tex_image(ctx, *texObj, *target, 0);
834
835 if (!ctx->Driver.BindRenderbufferTexImage(ctx, rb, texImage)) {
836 _mesa_DeleteTextures(1, tex);
837 return false;
838 }
839
840 if (ctx->Driver.FinishRenderTexture && !rb->NeedsFinishRenderTexture) {
841 rb->NeedsFinishRenderTexture = true;
842 ctx->Driver.FinishRenderTexture(ctx, rb);
843 }
844
845 return true;
846 }
847
848 GLuint
849 _mesa_meta_setup_sampler(struct gl_context *ctx,
850 const struct gl_texture_object *texObj,
851 GLenum target, GLenum filter, GLuint srcLevel)
852 {
853 GLuint sampler;
854 GLenum tex_filter = (filter == GL_SCALED_RESOLVE_FASTEST_EXT ||
855 filter == GL_SCALED_RESOLVE_NICEST_EXT) ?
856 GL_NEAREST : filter;
857
858 _mesa_GenSamplers(1, &sampler);
859 _mesa_BindSampler(ctx->Texture.CurrentUnit, sampler);
860
861 /* Prepare src texture state */
862 _mesa_BindTexture(target, texObj->Name);
863 _mesa_SamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, tex_filter);
864 _mesa_SamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, tex_filter);
865 if (target != GL_TEXTURE_RECTANGLE_ARB) {
866 _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, srcLevel);
867 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
868 }
869 _mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
870 _mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
871
872 return sampler;
873 }
874
875 /**
876 * Meta implementation of ctx->Driver.BlitFramebuffer() in terms
877 * of texture mapping and polygon rendering.
878 */
879 GLbitfield
880 _mesa_meta_BlitFramebuffer(struct gl_context *ctx,
881 const struct gl_framebuffer *readFb,
882 const struct gl_framebuffer *drawFb,
883 GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
884 GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
885 GLbitfield mask, GLenum filter)
886 {
887 const GLint dstW = abs(dstX1 - dstX0);
888 const GLint dstH = abs(dstY1 - dstY0);
889 const GLint dstFlipX = (dstX1 - dstX0) / dstW;
890 const GLint dstFlipY = (dstY1 - dstY0) / dstH;
891
892 struct {
893 GLint srcX0, srcY0, srcX1, srcY1;
894 GLint dstX0, dstY0, dstX1, dstY1;
895 } clip = {
896 srcX0, srcY0, srcX1, srcY1,
897 dstX0, dstY0, dstX1, dstY1
898 };
899
900 const GLboolean use_glsl_version = ctx->Extensions.ARB_vertex_shader &&
901 ctx->Extensions.ARB_fragment_shader;
902
903 /* Multisample texture blit support requires texture multisample. */
904 if (readFb->Visual.samples > 0 &&
905 !ctx->Extensions.ARB_texture_multisample) {
906 return mask;
907 }
908
909 /* Clip a copy of the blit coordinates. If these differ from the input
910 * coordinates, then we'll set the scissor.
911 */
912 if (!_mesa_clip_blit(ctx, readFb, drawFb,
913 &clip.srcX0, &clip.srcY0, &clip.srcX1, &clip.srcY1,
914 &clip.dstX0, &clip.dstY0, &clip.dstX1, &clip.dstY1)) {
915 /* clipped/scissored everything away */
916 return 0;
917 }
918
919 /* Only scissor affects blit, but we're doing to set a custom scissor if
920 * necessary anyway, so save/clear state.
921 */
922 _mesa_meta_begin(ctx, MESA_META_ALL & ~MESA_META_DRAW_BUFFERS);
923
924 /* Dithering shouldn't be performed for glBlitFramebuffer */
925 _mesa_set_enable(ctx, GL_DITHER, GL_FALSE);
926
927 /* If the clipping earlier changed the destination rect at all, then
928 * enable the scissor to clip to it.
929 */
930 if (clip.dstX0 != dstX0 || clip.dstY0 != dstY0 ||
931 clip.dstX1 != dstX1 || clip.dstY1 != dstY1) {
932 _mesa_set_enable(ctx, GL_SCISSOR_TEST, GL_TRUE);
933 _mesa_Scissor(MIN2(clip.dstX0, clip.dstX1),
934 MIN2(clip.dstY0, clip.dstY1),
935 abs(clip.dstX0 - clip.dstX1),
936 abs(clip.dstY0 - clip.dstY1));
937 }
938
939 /* Try faster, direct texture approach first */
940 if (mask & GL_COLOR_BUFFER_BIT) {
941 if (blitframebuffer_texture(ctx, readFb, drawFb,
942 srcX0, srcY0, srcX1, srcY1,
943 dstX0, dstY0, dstX1, dstY1,
944 filter, dstFlipX, dstFlipY,
945 use_glsl_version, false)) {
946 mask &= ~GL_COLOR_BUFFER_BIT;
947 }
948 }
949
950 if (mask & GL_DEPTH_BUFFER_BIT && use_glsl_version) {
951 if (blitframebuffer_texture(ctx, readFb, drawFb,
952 srcX0, srcY0, srcX1, srcY1,
953 dstX0, dstY0, dstX1, dstY1,
954 filter, dstFlipX, dstFlipY,
955 use_glsl_version, true)) {
956 mask &= ~GL_DEPTH_BUFFER_BIT;
957 }
958 }
959
960 if (mask & GL_STENCIL_BUFFER_BIT) {
961 /* XXX can't easily do stencil */
962 }
963
964 _mesa_meta_end(ctx);
965
966 return mask;
967 }
968
969 void
970 _mesa_meta_glsl_blit_cleanup(struct blit_state *blit)
971 {
972 if (blit->VAO) {
973 _mesa_DeleteVertexArrays(1, &blit->VAO);
974 blit->VAO = 0;
975 _mesa_DeleteBuffers(1, &blit->VBO);
976 blit->VBO = 0;
977 }
978
979 _mesa_meta_blit_shader_table_cleanup(&blit->shaders_with_depth);
980 _mesa_meta_blit_shader_table_cleanup(&blit->shaders_without_depth);
981
982 _mesa_DeleteTextures(1, &blit->depthTex.TexObj);
983 blit->depthTex.TexObj = 0;
984 }
985
986 void
987 _mesa_meta_and_swrast_BlitFramebuffer(struct gl_context *ctx,
988 struct gl_framebuffer *readFb,
989 struct gl_framebuffer *drawFb,
990 GLint srcX0, GLint srcY0,
991 GLint srcX1, GLint srcY1,
992 GLint dstX0, GLint dstY0,
993 GLint dstX1, GLint dstY1,
994 GLbitfield mask, GLenum filter)
995 {
996 mask = _mesa_meta_BlitFramebuffer(ctx, readFb, drawFb,
997 srcX0, srcY0, srcX1, srcY1,
998 dstX0, dstY0, dstX1, dstY1,
999 mask, filter);
1000 if (mask == 0x0)
1001 return;
1002
1003 _swrast_BlitFramebuffer(ctx, readFb, drawFb,
1004 srcX0, srcY0, srcX1, srcY1,
1005 dstX0, dstY0, dstX1, dstY1,
1006 mask, filter);
1007 }