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[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 *sampler_array_suffix = "";
75 float x_scale, y_scale;
76 enum blit_msaa_shader shader_index;
77
78 assert(src_rb);
79 samples = MAX2(src_rb->NumSamples, 1);
80
81 if (samples == 16)
82 x_scale = 4.0;
83 else
84 x_scale = 2.0;
85 y_scale = samples / x_scale;
86
87 /* We expect only power of 2 samples in source multisample buffer. */
88 assert(samples > 0 && _mesa_is_pow_two(samples));
89 while (samples >> (shader_offset + 1)) {
90 shader_offset++;
91 }
92 /* Update the assert if we plan to support more than 16X MSAA. */
93 assert(shader_offset > 0 && shader_offset <= 4);
94
95 assert(target == GL_TEXTURE_2D_MULTISAMPLE ||
96 target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY);
97
98 shader_index = BLIT_2X_MSAA_SHADER_2D_MULTISAMPLE_SCALED_RESOLVE +
99 shader_offset - 1;
100
101 if (target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) {
102 shader_index += BLIT_2X_MSAA_SHADER_2D_MULTISAMPLE_ARRAY_SCALED_RESOLVE -
103 BLIT_2X_MSAA_SHADER_2D_MULTISAMPLE_SCALED_RESOLVE;
104 sampler_array_suffix = "Array";
105 }
106
107 if (blit->msaa_shaders[shader_index]) {
108 _mesa_UseProgram(blit->msaa_shaders[shader_index]);
109 /* Update the uniform values. */
110 loc_src_width =
111 _mesa_GetUniformLocation(blit->msaa_shaders[shader_index], "src_width");
112 loc_src_height =
113 _mesa_GetUniformLocation(blit->msaa_shaders[shader_index], "src_height");
114 _mesa_Uniform1f(loc_src_width, src_rb->Width);
115 _mesa_Uniform1f(loc_src_height, src_rb->Height);
116 return;
117 }
118
119 name = ralloc_asprintf(mem_ctx, "vec4 MSAA scaled resolve");
120
121 /* Below switch is used to setup the shader expression, which computes
122 * sample index and map it to to a sample number on hardware.
123 */
124 switch(samples) {
125 case 2:
126 sample_number = "sample_map[int(2 * fract(coord.x))]";
127 sample_map = ctx->Const.SampleMap2x;
128 break;
129 case 4:
130 sample_number = "sample_map[int(2 * fract(coord.x) + 4 * fract(coord.y))]";
131 sample_map = ctx->Const.SampleMap4x;
132 break;
133 case 8:
134 sample_number = "sample_map[int(2 * fract(coord.x) + 8 * fract(coord.y))]";
135 sample_map = ctx->Const.SampleMap8x;
136 break;
137 case 16:
138 sample_number = "sample_map[int(4 * fract(coord.x) + 16 * fract(coord.y))]";
139 sample_map = ctx->Const.SampleMap16x;
140 break;
141 default:
142 sample_number = NULL;
143 sample_map = NULL;
144 _mesa_problem(ctx, "Unsupported sample count %d\n", samples);
145 unreachable("Unsupported sample count");
146 }
147
148 /* Create sample map string. */
149 for (i = 0 ; i < samples - 1; i++) {
150 ralloc_asprintf_append(&sample_map_str, "%d, ", sample_map[i]);
151 }
152 ralloc_asprintf_append(&sample_map_str, "%d", sample_map[samples - 1]);
153
154 /* Create sample map expression using above string. */
155 ralloc_asprintf_append(&sample_map_expr,
156 " const int sample_map[%d] = int[%d](%s);\n",
157 samples, samples, sample_map_str);
158
159 if (target == GL_TEXTURE_2D_MULTISAMPLE) {
160 ralloc_asprintf_append(&texel_fetch_macro,
161 "#define TEXEL_FETCH(coord) texelFetch(texSampler, ivec2(coord), %s);\n",
162 sample_number);
163 } else {
164 ralloc_asprintf_append(&texel_fetch_macro,
165 "#define TEXEL_FETCH(coord) texelFetch(texSampler, ivec3(coord, layer), %s);\n",
166 sample_number);
167 }
168
169 static const char vs_source[] =
170 "#version 130\n"
171 "in vec2 position;\n"
172 "in vec3 textureCoords;\n"
173 "out vec2 texCoords;\n"
174 "flat out int layer;\n"
175 "void main()\n"
176 "{\n"
177 " texCoords = textureCoords.xy;\n"
178 " layer = int(textureCoords.z);\n"
179 " gl_Position = vec4(position, 0.0, 1.0);\n"
180 "}\n"
181 ;
182
183 fs_source = ralloc_asprintf(mem_ctx,
184 "#version 130\n"
185 "#extension GL_ARB_texture_multisample : enable\n"
186 "uniform sampler2DMS%s texSampler;\n"
187 "uniform float src_width, src_height;\n"
188 "in vec2 texCoords;\n"
189 "flat in int layer;\n"
190 "out vec4 out_color;\n"
191 "\n"
192 "void main()\n"
193 "{\n"
194 "%s"
195 " vec2 interp;\n"
196 " const vec2 scale = vec2(%ff, %ff);\n"
197 " const vec2 scale_inv = vec2(%ff, %ff);\n"
198 " const vec2 s_0_offset = vec2(%ff, %ff);\n"
199 " vec2 s_0_coord, s_1_coord, s_2_coord, s_3_coord;\n"
200 " vec4 s_0_color, s_1_color, s_2_color, s_3_color;\n"
201 " vec4 x_0_color, x_1_color;\n"
202 " vec2 tex_coord = texCoords - s_0_offset;\n"
203 "\n"
204 " tex_coord *= scale;\n"
205 " tex_coord.x = clamp(tex_coord.x, 0.0f, scale.x * src_width - 1.0f);\n"
206 " tex_coord.y = clamp(tex_coord.y, 0.0f, scale.y * src_height - 1.0f);\n"
207 " interp = fract(tex_coord);\n"
208 " tex_coord = ivec2(tex_coord) * scale_inv;\n"
209 "\n"
210 " /* Compute the sample coordinates used for filtering. */\n"
211 " s_0_coord = tex_coord;\n"
212 " s_1_coord = tex_coord + vec2(scale_inv.x, 0.0f);\n"
213 " s_2_coord = tex_coord + vec2(0.0f, scale_inv.y);\n"
214 " s_3_coord = tex_coord + vec2(scale_inv.x, scale_inv.y);\n"
215 "\n"
216 " /* Fetch sample color values. */\n"
217 "%s"
218 " s_0_color = TEXEL_FETCH(s_0_coord)\n"
219 " s_1_color = TEXEL_FETCH(s_1_coord)\n"
220 " s_2_color = TEXEL_FETCH(s_2_coord)\n"
221 " s_3_color = TEXEL_FETCH(s_3_coord)\n"
222 "#undef TEXEL_FETCH\n"
223 "\n"
224 " /* Do bilinear filtering on sample colors. */\n"
225 " x_0_color = mix(s_0_color, s_1_color, interp.x);\n"
226 " x_1_color = mix(s_2_color, s_3_color, interp.x);\n"
227 " out_color = mix(x_0_color, x_1_color, interp.y);\n"
228 "}\n",
229 sampler_array_suffix,
230 sample_map_expr,
231 x_scale, y_scale,
232 1.0f / x_scale, 1.0f / y_scale,
233 0.5f / x_scale, 0.5f / y_scale,
234 texel_fetch_macro);
235
236 _mesa_meta_compile_and_link_program(ctx, vs_source, fs_source, name,
237 &blit->msaa_shaders[shader_index]);
238 loc_src_width =
239 _mesa_GetUniformLocation(blit->msaa_shaders[shader_index], "src_width");
240 loc_src_height =
241 _mesa_GetUniformLocation(blit->msaa_shaders[shader_index], "src_height");
242 _mesa_Uniform1f(loc_src_width, src_rb->Width);
243 _mesa_Uniform1f(loc_src_height, src_rb->Height);
244
245 ralloc_free(mem_ctx);
246 }
247
248 static void
249 setup_glsl_msaa_blit_shader(struct gl_context *ctx,
250 struct blit_state *blit,
251 const struct gl_framebuffer *drawFb,
252 struct gl_renderbuffer *src_rb,
253 GLenum target)
254 {
255 const char *vs_source;
256 char *fs_source;
257 void *mem_ctx;
258 enum blit_msaa_shader shader_index;
259 bool dst_is_msaa = false;
260 GLenum src_datatype;
261 const char *vec4_prefix;
262 const char *sampler_array_suffix = "";
263 char *name;
264 const char *texcoord_type = "vec2";
265 int samples;
266 int shader_offset = 0;
267
268 if (src_rb) {
269 samples = MAX2(src_rb->NumSamples, 1);
270 src_datatype = _mesa_get_format_datatype(src_rb->Format);
271 } else {
272 /* depth-or-color glCopyTexImage fallback path that passes a NULL rb and
273 * doesn't handle integer.
274 */
275 samples = 1;
276 src_datatype = GL_UNSIGNED_NORMALIZED;
277 }
278
279 /* We expect only power of 2 samples in source multisample buffer. */
280 assert(samples > 0 && _mesa_is_pow_two(samples));
281 while (samples >> (shader_offset + 1)) {
282 shader_offset++;
283 }
284 /* Update the assert if we plan to support more than 16X MSAA. */
285 assert(shader_offset >= 0 && shader_offset <= 4);
286
287 if (drawFb->Visual.samples > 1) {
288 /* If you're calling meta_BlitFramebuffer with the destination
289 * multisampled, this is the only path that will work -- swrast and
290 * CopyTexImage won't work on it either.
291 */
292 assert(ctx->Extensions.ARB_sample_shading);
293
294 dst_is_msaa = true;
295
296 /* We need shader invocation per sample, not per pixel */
297 _mesa_set_enable(ctx, GL_MULTISAMPLE, GL_TRUE);
298 _mesa_set_enable(ctx, GL_SAMPLE_SHADING, GL_TRUE);
299 _mesa_MinSampleShading(1.0);
300 }
301
302 switch (target) {
303 case GL_TEXTURE_2D_MULTISAMPLE:
304 case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
305 if (src_rb && (src_rb->_BaseFormat == GL_DEPTH_COMPONENT ||
306 src_rb->_BaseFormat == GL_DEPTH_STENCIL)) {
307 if (dst_is_msaa)
308 shader_index = BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_COPY;
309 else
310 shader_index = BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_RESOLVE;
311 } else {
312 if (dst_is_msaa)
313 shader_index = BLIT_MSAA_SHADER_2D_MULTISAMPLE_COPY;
314 else {
315 shader_index = BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE +
316 shader_offset;
317 }
318 }
319
320 if (target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY) {
321 shader_index += (BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_ARRAY_RESOLVE -
322 BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE);
323 sampler_array_suffix = "Array";
324 texcoord_type = "vec3";
325 }
326 break;
327 default:
328 _mesa_problem(ctx, "Unkown texture target %s\n",
329 _mesa_enum_to_string(target));
330 shader_index = BLIT_2X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE;
331 }
332
333 /* We rely on the enum being sorted this way. */
334 STATIC_ASSERT(BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE_INT ==
335 BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE + 5);
336 STATIC_ASSERT(BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE_UINT ==
337 BLIT_1X_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE + 10);
338 if (src_datatype == GL_INT) {
339 shader_index += 5;
340 vec4_prefix = "i";
341 } else if (src_datatype == GL_UNSIGNED_INT) {
342 shader_index += 10;
343 vec4_prefix = "u";
344 } else {
345 vec4_prefix = "";
346 }
347
348 if (blit->msaa_shaders[shader_index]) {
349 _mesa_UseProgram(blit->msaa_shaders[shader_index]);
350 return;
351 }
352
353 mem_ctx = ralloc_context(NULL);
354
355 if (shader_index == BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_RESOLVE ||
356 shader_index == BLIT_MSAA_SHADER_2D_MULTISAMPLE_ARRAY_DEPTH_RESOLVE ||
357 shader_index == BLIT_MSAA_SHADER_2D_MULTISAMPLE_ARRAY_DEPTH_COPY ||
358 shader_index == BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_COPY) {
359 char *sample_index;
360
361 if (dst_is_msaa) {
362 sample_index = "gl_SampleID";
363 name = "depth MSAA copy";
364 } else {
365 /* From the GL 4.3 spec:
366 *
367 * "If there is a multisample buffer (the value of SAMPLE_BUFFERS
368 * is one), then values are obtained from the depth samples in
369 * this buffer. It is recommended that the depth value of the
370 * centermost sample be used, though implementations may choose
371 * any function of the depth sample values at each pixel.
372 *
373 * We're slacking and instead of choosing centermost, we've got 0.
374 */
375 sample_index = "0";
376 name = "depth MSAA resolve";
377 }
378
379 vs_source = ralloc_asprintf(mem_ctx,
380 "#version 130\n"
381 "in vec2 position;\n"
382 "in %s textureCoords;\n"
383 "out %s texCoords;\n"
384 "void main()\n"
385 "{\n"
386 " texCoords = textureCoords;\n"
387 " gl_Position = vec4(position, 0.0, 1.0);\n"
388 "}\n",
389 texcoord_type,
390 texcoord_type);
391 fs_source = ralloc_asprintf(mem_ctx,
392 "#version 130\n"
393 "#extension GL_ARB_texture_multisample : enable\n"
394 "#extension GL_ARB_sample_shading : enable\n"
395 "uniform sampler2DMS%s texSampler;\n"
396 "in %s texCoords;\n"
397 "out vec4 out_color;\n"
398 "\n"
399 "void main()\n"
400 "{\n"
401 " gl_FragDepth = texelFetch(texSampler, i%s(texCoords), %s).r;\n"
402 "}\n",
403 sampler_array_suffix,
404 texcoord_type,
405 texcoord_type,
406 sample_index);
407 } else {
408 /* You can create 2D_MULTISAMPLE textures with 0 sample count (meaning 1
409 * sample). Yes, this is ridiculous.
410 */
411 char *sample_resolve;
412 const char *merge_function;
413 name = ralloc_asprintf(mem_ctx, "%svec4 MSAA %s",
414 vec4_prefix,
415 dst_is_msaa ? "copy" : "resolve");
416
417 if (dst_is_msaa) {
418 sample_resolve = ralloc_asprintf(mem_ctx, " out_color = texelFetch(texSampler, i%s(texCoords), gl_SampleID);", texcoord_type);
419 merge_function = "";
420 } else {
421 int i;
422 int step;
423
424 if (src_datatype == GL_INT || src_datatype == GL_UNSIGNED_INT) {
425 merge_function =
426 "gvec4 merge(gvec4 a, gvec4 b) { return (a >> gvec4(1)) + (b >> gvec4(1)) + (a & b & gvec4(1)); }\n";
427 } else {
428 /* The divide will happen at the end for floats. */
429 merge_function =
430 "vec4 merge(vec4 a, vec4 b) { return (a + b); }\n";
431 }
432
433 /* We're assuming power of two samples for this resolution procedure.
434 *
435 * To avoid losing any floating point precision if the samples all
436 * happen to have the same value, we merge pairs of values at a time
437 * (so the floating point exponent just gets increased), rather than
438 * doing a naive sum and dividing.
439 */
440 assert(_mesa_is_pow_two(samples));
441 /* Fetch each individual sample. */
442 sample_resolve = rzalloc_size(mem_ctx, 1);
443 for (i = 0; i < samples; i++) {
444 ralloc_asprintf_append(&sample_resolve,
445 " gvec4 sample_1_%d = texelFetch(texSampler, i%s(texCoords), %d);\n",
446 i, texcoord_type, i);
447 }
448 /* Now, merge each pair of samples, then merge each pair of those,
449 * etc.
450 */
451 for (step = 2; step <= samples; step *= 2) {
452 for (i = 0; i < samples; i += step) {
453 ralloc_asprintf_append(&sample_resolve,
454 " gvec4 sample_%d_%d = merge(sample_%d_%d, sample_%d_%d);\n",
455 step, i,
456 step / 2, i,
457 step / 2, i + step / 2);
458 }
459 }
460
461 /* Scale the final result. */
462 if (src_datatype == GL_UNSIGNED_INT || src_datatype == GL_INT) {
463 ralloc_asprintf_append(&sample_resolve,
464 " out_color = sample_%d_0;\n",
465 samples);
466 } else {
467 ralloc_asprintf_append(&sample_resolve,
468 " gl_FragColor = sample_%d_0 / %f;\n",
469 samples, (float)samples);
470 }
471 }
472
473 vs_source = ralloc_asprintf(mem_ctx,
474 "#version 130\n"
475 "in vec2 position;\n"
476 "in %s textureCoords;\n"
477 "out %s texCoords;\n"
478 "void main()\n"
479 "{\n"
480 " texCoords = textureCoords;\n"
481 " gl_Position = vec4(position, 0.0, 1.0);\n"
482 "}\n",
483 texcoord_type,
484 texcoord_type);
485 fs_source = ralloc_asprintf(mem_ctx,
486 "#version 130\n"
487 "#extension GL_ARB_texture_multisample : enable\n"
488 "#extension GL_ARB_sample_shading : enable\n"
489 "#define gvec4 %svec4\n"
490 "uniform %ssampler2DMS%s texSampler;\n"
491 "in %s texCoords;\n"
492 "out gvec4 out_color;\n"
493 "\n"
494 "%s" /* merge_function */
495 "void main()\n"
496 "{\n"
497 "%s\n" /* sample_resolve */
498 "}\n",
499 vec4_prefix,
500 vec4_prefix,
501 sampler_array_suffix,
502 texcoord_type,
503 merge_function,
504 sample_resolve);
505 }
506
507 _mesa_meta_compile_and_link_program(ctx, vs_source, fs_source, name,
508 &blit->msaa_shaders[shader_index]);
509
510 ralloc_free(mem_ctx);
511 }
512
513 static void
514 setup_glsl_blit_framebuffer(struct gl_context *ctx,
515 struct blit_state *blit,
516 const struct gl_framebuffer *drawFb,
517 struct gl_renderbuffer *src_rb,
518 GLenum target, GLenum filter,
519 bool is_scaled_blit,
520 bool do_depth)
521 {
522 unsigned texcoord_size;
523 bool is_target_multisample = target == GL_TEXTURE_2D_MULTISAMPLE ||
524 target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY;
525 bool is_filter_scaled_resolve = filter == GL_SCALED_RESOLVE_FASTEST_EXT ||
526 filter == GL_SCALED_RESOLVE_NICEST_EXT;
527
528 /* target = GL_TEXTURE_RECTANGLE is not supported in GLES 3.0 */
529 assert(_mesa_is_desktop_gl(ctx) || target == GL_TEXTURE_2D);
530
531 texcoord_size = 2 + (src_rb->Depth > 1 ? 1 : 0);
532
533 _mesa_meta_setup_vertex_objects(&blit->VAO, &blit->VBO, true,
534 2, texcoord_size, 0);
535
536 if (is_target_multisample && is_filter_scaled_resolve && is_scaled_blit) {
537 setup_glsl_msaa_blit_scaled_shader(ctx, blit, src_rb, target, filter);
538 } else if (is_target_multisample) {
539 setup_glsl_msaa_blit_shader(ctx, blit, drawFb, src_rb, target);
540 } else {
541 _mesa_meta_setup_blit_shader(ctx, target, do_depth,
542 do_depth ? &blit->shaders_with_depth
543 : &blit->shaders_without_depth);
544 }
545 }
546
547 /**
548 * Try to do a color or depth glBlitFramebuffer using texturing.
549 *
550 * We can do this when the src renderbuffer is actually a texture, or when the
551 * driver exposes BindRenderbufferTexImage().
552 */
553 static bool
554 blitframebuffer_texture(struct gl_context *ctx,
555 const struct gl_framebuffer *readFb,
556 const struct gl_framebuffer *drawFb,
557 GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
558 GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
559 GLenum filter, GLint flipX, GLint flipY,
560 GLboolean glsl_version, GLboolean do_depth)
561 {
562 int att_index = do_depth ? BUFFER_DEPTH : readFb->_ColorReadBufferIndex;
563 const struct gl_renderbuffer_attachment *readAtt =
564 &readFb->Attachment[att_index];
565 struct blit_state *blit = &ctx->Meta->Blit;
566 struct fb_tex_blit_state fb_tex_blit;
567 const GLint dstX = MIN2(dstX0, dstX1);
568 const GLint dstY = MIN2(dstY0, dstY1);
569 const GLint dstW = abs(dstX1 - dstX0);
570 const GLint dstH = abs(dstY1 - dstY0);
571 const int srcW = abs(srcX1 - srcX0);
572 const int srcH = abs(srcY1 - srcY0);
573 bool scaled_blit = false;
574 struct gl_texture_object *texObj;
575 GLuint srcLevel;
576 GLenum target;
577 struct gl_renderbuffer *rb = readAtt->Renderbuffer;
578 struct temp_texture *meta_temp_texture;
579
580 if (rb->NumSamples && !ctx->Extensions.ARB_texture_multisample)
581 return false;
582
583 _mesa_meta_fb_tex_blit_begin(ctx, &fb_tex_blit);
584
585 if (readAtt->Texture &&
586 (readAtt->Texture->Target == GL_TEXTURE_2D ||
587 readAtt->Texture->Target == GL_TEXTURE_RECTANGLE ||
588 readAtt->Texture->Target == GL_TEXTURE_2D_MULTISAMPLE ||
589 readAtt->Texture->Target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY)) {
590 /* If there's a texture attached of a type we can handle, then just use
591 * it directly.
592 */
593 srcLevel = readAtt->TextureLevel;
594 texObj = readAtt->Texture;
595 target = texObj->Target;
596 } else if (!readAtt->Texture && ctx->Driver.BindRenderbufferTexImage) {
597 if (!_mesa_meta_bind_rb_as_tex_image(ctx, rb, &fb_tex_blit.tempTex,
598 &texObj, &target))
599 return false;
600
601 srcLevel = 0;
602 if (_mesa_is_winsys_fbo(readFb)) {
603 GLint temp = srcY0;
604 srcY0 = rb->Height - srcY1;
605 srcY1 = rb->Height - temp;
606 flipY = -flipY;
607 }
608 } else {
609 GLenum tex_base_format;
610 /* Fall back to doing a CopyTexSubImage to get the destination
611 * renderbuffer into a texture.
612 */
613 if (ctx->Meta->Blit.no_ctsi_fallback)
614 return false;
615
616 if (rb->NumSamples > 1)
617 return false;
618
619 if (do_depth) {
620 meta_temp_texture = _mesa_meta_get_temp_depth_texture(ctx);
621 tex_base_format = GL_DEPTH_COMPONENT;
622 } else {
623 meta_temp_texture = _mesa_meta_get_temp_texture(ctx);
624 tex_base_format =
625 _mesa_base_tex_format(ctx, rb->InternalFormat);
626 }
627
628 srcLevel = 0;
629 target = meta_temp_texture->Target;
630 texObj = _mesa_lookup_texture(ctx, meta_temp_texture->TexObj);
631 if (texObj == NULL) {
632 return false;
633 }
634
635 _mesa_meta_setup_copypix_texture(ctx, meta_temp_texture,
636 srcX0, srcY0,
637 srcW, srcH,
638 tex_base_format,
639 filter);
640
641
642 srcX0 = 0;
643 srcY0 = 0;
644 srcX1 = srcW;
645 srcY1 = srcH;
646 }
647
648 fb_tex_blit.baseLevelSave = texObj->BaseLevel;
649 fb_tex_blit.maxLevelSave = texObj->MaxLevel;
650 fb_tex_blit.stencilSamplingSave = texObj->StencilSampling;
651
652 scaled_blit = dstW != srcW || dstH != srcH;
653
654 if (glsl_version) {
655 setup_glsl_blit_framebuffer(ctx, blit, drawFb, rb, target, filter, scaled_blit,
656 do_depth);
657 }
658 else {
659 _mesa_meta_setup_ff_tnl_for_blit(&ctx->Meta->Blit.VAO,
660 &ctx->Meta->Blit.VBO,
661 2);
662 }
663
664 /*
665 printf("Blit from texture!\n");
666 printf(" srcAtt %p dstAtt %p\n", readAtt, drawAtt);
667 printf(" srcTex %p dstText %p\n", texObj, drawAtt->Texture);
668 */
669
670 fb_tex_blit.sampler = _mesa_meta_setup_sampler(ctx, texObj, target, filter,
671 srcLevel);
672
673 /* Always do our blits with no net sRGB decode or encode.
674 *
675 * However, if both the src and dst can be srgb decode/encoded, enable them
676 * so that we do any blending (from scaling or from MSAA resolves) in the
677 * right colorspace.
678 *
679 * Our choice of not doing any net encode/decode is from the GL 3.0
680 * specification:
681 *
682 * "Blit operations bypass the fragment pipeline. The only fragment
683 * operations which affect a blit are the pixel ownership test and the
684 * scissor test."
685 *
686 * The GL 4.4 specification disagrees and says that the sRGB part of the
687 * fragment pipeline applies, but this was found to break applications.
688 */
689 if (ctx->Extensions.EXT_texture_sRGB_decode) {
690 if (_mesa_get_format_color_encoding(rb->Format) == GL_SRGB &&
691 drawFb->Visual.sRGBCapable) {
692 _mesa_SamplerParameteri(fb_tex_blit.sampler,
693 GL_TEXTURE_SRGB_DECODE_EXT, GL_DECODE_EXT);
694 _mesa_set_framebuffer_srgb(ctx, GL_TRUE);
695 } else {
696 _mesa_SamplerParameteri(fb_tex_blit.sampler,
697 GL_TEXTURE_SRGB_DECODE_EXT,
698 GL_SKIP_DECODE_EXT);
699 /* set_framebuffer_srgb was set by _mesa_meta_begin(). */
700 }
701 }
702
703 if (!glsl_version) {
704 _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
705 _mesa_set_enable(ctx, target, GL_TRUE);
706 }
707
708 /* Prepare vertex data (the VBO was previously created and bound) */
709 {
710 struct vertex verts[4];
711 GLfloat s0, t0, s1, t1;
712
713 if (target == GL_TEXTURE_2D) {
714 const struct gl_texture_image *texImage
715 = _mesa_select_tex_image(texObj, target, srcLevel);
716 s0 = srcX0 / (float) texImage->Width;
717 s1 = srcX1 / (float) texImage->Width;
718 t0 = srcY0 / (float) texImage->Height;
719 t1 = srcY1 / (float) texImage->Height;
720 }
721 else {
722 assert(target == GL_TEXTURE_RECTANGLE_ARB ||
723 target == GL_TEXTURE_2D_MULTISAMPLE ||
724 target == GL_TEXTURE_2D_MULTISAMPLE_ARRAY);
725 s0 = (float) srcX0;
726 s1 = (float) srcX1;
727 t0 = (float) srcY0;
728 t1 = (float) srcY1;
729 }
730
731 /* Silence valgrind warnings about reading uninitialized stack. */
732 memset(verts, 0, sizeof(verts));
733
734 /* setup vertex positions */
735 verts[0].x = -1.0F * flipX;
736 verts[0].y = -1.0F * flipY;
737 verts[1].x = 1.0F * flipX;
738 verts[1].y = -1.0F * flipY;
739 verts[2].x = 1.0F * flipX;
740 verts[2].y = 1.0F * flipY;
741 verts[3].x = -1.0F * flipX;
742 verts[3].y = 1.0F * flipY;
743
744 verts[0].tex[0] = s0;
745 verts[0].tex[1] = t0;
746 verts[0].tex[2] = readAtt->Zoffset;
747 verts[1].tex[0] = s1;
748 verts[1].tex[1] = t0;
749 verts[1].tex[2] = readAtt->Zoffset;
750 verts[2].tex[0] = s1;
751 verts[2].tex[1] = t1;
752 verts[2].tex[2] = readAtt->Zoffset;
753 verts[3].tex[0] = s0;
754 verts[3].tex[1] = t1;
755 verts[3].tex[2] = readAtt->Zoffset;
756
757 _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
758 }
759
760 /* setup viewport */
761 _mesa_set_viewport(ctx, 0, dstX, dstY, dstW, dstH);
762 _mesa_ColorMask(!do_depth, !do_depth, !do_depth, !do_depth);
763 _mesa_set_enable(ctx, GL_DEPTH_TEST, do_depth);
764 _mesa_DepthMask(do_depth);
765 _mesa_DepthFunc(GL_ALWAYS);
766
767 _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
768 _mesa_meta_fb_tex_blit_end(ctx, target, &fb_tex_blit);
769
770 return true;
771 }
772
773 void
774 _mesa_meta_fb_tex_blit_begin(const struct gl_context *ctx,
775 struct fb_tex_blit_state *blit)
776 {
777 blit->samplerSave =
778 ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ?
779 ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0;
780 blit->tempTex = 0;
781 }
782
783 void
784 _mesa_meta_fb_tex_blit_end(struct gl_context *ctx, GLenum target,
785 struct fb_tex_blit_state *blit)
786 {
787 /* Restore texture object state, the texture binding will
788 * be restored by _mesa_meta_end().
789 */
790 if (target != GL_TEXTURE_RECTANGLE_ARB) {
791 _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, blit->baseLevelSave);
792 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, blit->maxLevelSave);
793
794 if (ctx->Extensions.ARB_stencil_texturing) {
795 const struct gl_texture_object *texObj =
796 _mesa_get_current_tex_object(ctx, target);
797
798 if (texObj->StencilSampling != blit->stencilSamplingSave)
799 _mesa_TexParameteri(target, GL_DEPTH_STENCIL_TEXTURE_MODE,
800 blit->stencilSamplingSave ?
801 GL_STENCIL_INDEX : GL_DEPTH_COMPONENT);
802 }
803 }
804
805 _mesa_BindSampler(ctx->Texture.CurrentUnit, blit->samplerSave);
806 _mesa_DeleteSamplers(1, &blit->sampler);
807 if (blit->tempTex)
808 _mesa_DeleteTextures(1, &blit->tempTex);
809 }
810
811 GLboolean
812 _mesa_meta_bind_rb_as_tex_image(struct gl_context *ctx,
813 struct gl_renderbuffer *rb,
814 GLuint *tex,
815 struct gl_texture_object **texObj,
816 GLenum *target)
817 {
818 struct gl_texture_image *texImage;
819 GLuint tempTex;
820
821 if (rb->NumSamples > 1)
822 *target = GL_TEXTURE_2D_MULTISAMPLE;
823 else
824 *target = GL_TEXTURE_2D;
825
826 tempTex = 0;
827 _mesa_GenTextures(1, &tempTex);
828 if (tempTex == 0)
829 return false;
830
831 *tex = tempTex;
832
833 _mesa_BindTexture(*target, *tex);
834 *texObj = _mesa_lookup_texture(ctx, *tex);
835 texImage = _mesa_get_tex_image(ctx, *texObj, *target, 0);
836
837 if (!ctx->Driver.BindRenderbufferTexImage(ctx, rb, texImage)) {
838 _mesa_DeleteTextures(1, tex);
839 return false;
840 }
841
842 if (ctx->Driver.FinishRenderTexture && !rb->NeedsFinishRenderTexture) {
843 rb->NeedsFinishRenderTexture = true;
844 ctx->Driver.FinishRenderTexture(ctx, rb);
845 }
846
847 return true;
848 }
849
850 GLuint
851 _mesa_meta_setup_sampler(struct gl_context *ctx,
852 const struct gl_texture_object *texObj,
853 GLenum target, GLenum filter, GLuint srcLevel)
854 {
855 GLuint sampler;
856 GLenum tex_filter = (filter == GL_SCALED_RESOLVE_FASTEST_EXT ||
857 filter == GL_SCALED_RESOLVE_NICEST_EXT) ?
858 GL_NEAREST : filter;
859
860 _mesa_GenSamplers(1, &sampler);
861 _mesa_BindSampler(ctx->Texture.CurrentUnit, sampler);
862
863 /* Prepare src texture state */
864 _mesa_BindTexture(target, texObj->Name);
865 _mesa_SamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, tex_filter);
866 _mesa_SamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, tex_filter);
867 if (target != GL_TEXTURE_RECTANGLE_ARB) {
868 _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, srcLevel);
869 _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
870 }
871 _mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
872 _mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
873
874 return sampler;
875 }
876
877 /**
878 * Meta implementation of ctx->Driver.BlitFramebuffer() in terms
879 * of texture mapping and polygon rendering.
880 */
881 GLbitfield
882 _mesa_meta_BlitFramebuffer(struct gl_context *ctx,
883 const struct gl_framebuffer *readFb,
884 const struct gl_framebuffer *drawFb,
885 GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
886 GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
887 GLbitfield mask, GLenum filter)
888 {
889 const GLint dstW = abs(dstX1 - dstX0);
890 const GLint dstH = abs(dstY1 - dstY0);
891 const GLint dstFlipX = (dstX1 - dstX0) / dstW;
892 const GLint dstFlipY = (dstY1 - dstY0) / dstH;
893
894 struct {
895 GLint srcX0, srcY0, srcX1, srcY1;
896 GLint dstX0, dstY0, dstX1, dstY1;
897 } clip = {
898 srcX0, srcY0, srcX1, srcY1,
899 dstX0, dstY0, dstX1, dstY1
900 };
901
902 const GLboolean use_glsl_version = ctx->Extensions.ARB_vertex_shader &&
903 ctx->Extensions.ARB_fragment_shader;
904
905 /* Multisample texture blit support requires texture multisample. */
906 if (readFb->Visual.samples > 0 &&
907 !ctx->Extensions.ARB_texture_multisample) {
908 return mask;
909 }
910
911 /* Clip a copy of the blit coordinates. If these differ from the input
912 * coordinates, then we'll set the scissor.
913 */
914 if (!_mesa_clip_blit(ctx, readFb, drawFb,
915 &clip.srcX0, &clip.srcY0, &clip.srcX1, &clip.srcY1,
916 &clip.dstX0, &clip.dstY0, &clip.dstX1, &clip.dstY1)) {
917 /* clipped/scissored everything away */
918 return 0;
919 }
920
921 /* Only scissor affects blit, but we're doing to set a custom scissor if
922 * necessary anyway, so save/clear state.
923 */
924 _mesa_meta_begin(ctx, MESA_META_ALL & ~MESA_META_DRAW_BUFFERS);
925
926 /* Dithering shouldn't be performed for glBlitFramebuffer */
927 _mesa_set_enable(ctx, GL_DITHER, GL_FALSE);
928
929 /* If the clipping earlier changed the destination rect at all, then
930 * enable the scissor to clip to it.
931 */
932 if (clip.dstX0 != dstX0 || clip.dstY0 != dstY0 ||
933 clip.dstX1 != dstX1 || clip.dstY1 != dstY1) {
934 _mesa_set_enable(ctx, GL_SCISSOR_TEST, GL_TRUE);
935 _mesa_Scissor(MIN2(clip.dstX0, clip.dstX1),
936 MIN2(clip.dstY0, clip.dstY1),
937 abs(clip.dstX0 - clip.dstX1),
938 abs(clip.dstY0 - clip.dstY1));
939 }
940
941 /* Try faster, direct texture approach first */
942 if (mask & GL_COLOR_BUFFER_BIT) {
943 if (blitframebuffer_texture(ctx, readFb, drawFb,
944 srcX0, srcY0, srcX1, srcY1,
945 dstX0, dstY0, dstX1, dstY1,
946 filter, dstFlipX, dstFlipY,
947 use_glsl_version, false)) {
948 mask &= ~GL_COLOR_BUFFER_BIT;
949 }
950 }
951
952 if (mask & GL_DEPTH_BUFFER_BIT && use_glsl_version) {
953 if (blitframebuffer_texture(ctx, readFb, drawFb,
954 srcX0, srcY0, srcX1, srcY1,
955 dstX0, dstY0, dstX1, dstY1,
956 filter, dstFlipX, dstFlipY,
957 use_glsl_version, true)) {
958 mask &= ~GL_DEPTH_BUFFER_BIT;
959 }
960 }
961
962 if (mask & GL_STENCIL_BUFFER_BIT) {
963 /* XXX can't easily do stencil */
964 }
965
966 _mesa_meta_end(ctx);
967
968 return mask;
969 }
970
971 void
972 _mesa_meta_glsl_blit_cleanup(struct blit_state *blit)
973 {
974 if (blit->VAO) {
975 _mesa_DeleteVertexArrays(1, &blit->VAO);
976 blit->VAO = 0;
977 _mesa_DeleteBuffers(1, &blit->VBO);
978 blit->VBO = 0;
979 }
980
981 _mesa_meta_blit_shader_table_cleanup(&blit->shaders_with_depth);
982 _mesa_meta_blit_shader_table_cleanup(&blit->shaders_without_depth);
983
984 _mesa_DeleteTextures(1, &blit->depthTex.TexObj);
985 blit->depthTex.TexObj = 0;
986 }
987
988 void
989 _mesa_meta_and_swrast_BlitFramebuffer(struct gl_context *ctx,
990 struct gl_framebuffer *readFb,
991 struct gl_framebuffer *drawFb,
992 GLint srcX0, GLint srcY0,
993 GLint srcX1, GLint srcY1,
994 GLint dstX0, GLint dstY0,
995 GLint dstX1, GLint dstY1,
996 GLbitfield mask, GLenum filter)
997 {
998 mask = _mesa_meta_BlitFramebuffer(ctx, readFb, drawFb,
999 srcX0, srcY0, srcX1, srcY1,
1000 dstX0, dstY0, dstX1, dstY1,
1001 mask, filter);
1002 if (mask == 0x0)
1003 return;
1004
1005 _swrast_BlitFramebuffer(ctx, readFb, drawFb,
1006 srcX0, srcY0, srcX1, srcY1,
1007 dstX0, dstY0, dstX1, dstY1,
1008 mask, filter);
1009 }