1 /**************************************************************************
2 *
3 * Copyright (C) 2014 Red Hat Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included
13 * in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
22 *
23 **************************************************************************/
24
25 /* gallium blitter implementation in GL */
26 /* for when we can't use glBlitFramebuffer */
27 #include <epoxy/gl.h>
28
29 #include <stdio.h>
30 #include "pipe/p_shader_tokens.h"
31
32 #include "pipe/p_context.h"
33 #include "pipe/p_defines.h"
34 #include "pipe/p_screen.h"
35 #include "pipe/p_state.h"
36 #include "util/u_inlines.h"
37 #include "util/u_memory.h"
38 #include "util/u_dual_blend.h"
39
40 #include "util/u_double_list.h"
41 #include "util/u_format.h"
42 #include "util/u_texture.h"
43 #include "tgsi/tgsi_parse.h"
44
45 #include "vrend_object.h"
46 #include "vrend_shader.h"
47
48 #include "vrend_renderer.h"
49
50 #include "vrend_blitter.h"
51
52 #define DEST_SWIZZLE_SNIPPET_SIZE 64
53
54 struct vrend_blitter_ctx {
55 virgl_gl_context gl_context;
56 bool initialised;
57 bool use_gles;
58 int framebuffer_srgb_enabled;
59
60 GLuint vaoid;
61
62 GLuint vs;
63 GLuint vs_pos_only;
64 GLuint fs_texfetch_col[PIPE_MAX_TEXTURE_TYPES];
65 GLuint fs_texfetch_depth[PIPE_MAX_TEXTURE_TYPES];
66 GLuint fs_texfetch_depth_msaa[PIPE_MAX_TEXTURE_TYPES];
67 GLuint fs_texfetch_col_swizzle;
68 GLuint fb_id;
69
70 unsigned dst_width;
71 unsigned dst_height;
72
73 GLuint vbo_id;
74 GLfloat vertices[4][2][4]; /**< {pos, color} or {pos, texcoord} */
75 };
76
77 static struct vrend_blitter_ctx vrend_blit_ctx;
78
79 struct vrend_blitter_point {
80 int x;
81 int y;
82 };
83
84 struct vrend_blitter_delta {
85 int dx;
86 int dy;
87 };
88
build_and_check(GLuint id,const char * buf)89 static bool build_and_check(GLuint id, const char *buf)
90 {
91 GLint param;
92 glShaderSource(id, 1, (const char **)&buf, NULL);
93 glCompileShader(id);
94
95 glGetShaderiv(id, GL_COMPILE_STATUS, ¶m);
96 if (param == GL_FALSE) {
97 char infolog[65536];
98 int len;
99 glGetShaderInfoLog(id, 65536, &len, infolog);
100 fprintf(stderr,"shader failed to compile\n%s\n", infolog);
101 fprintf(stderr,"GLSL:\n%s\n", buf);
102 return false;
103 }
104 return true;
105 }
106
blit_build_vs_passthrough(struct vrend_blitter_ctx * blit_ctx)107 static bool blit_build_vs_passthrough(struct vrend_blitter_ctx *blit_ctx)
108 {
109 blit_ctx->vs = glCreateShader(GL_VERTEX_SHADER);
110
111 if (!build_and_check(blit_ctx->vs,
112 blit_ctx->use_gles ? VS_PASSTHROUGH_GLES : VS_PASSTHROUGH_GL)) {
113 glDeleteShader(blit_ctx->vs);
114 blit_ctx->vs = 0;
115 return false;
116 }
117 return true;
118 }
119
create_dest_swizzle_snippet(const uint8_t swizzle[4],char snippet[DEST_SWIZZLE_SNIPPET_SIZE])120 static void create_dest_swizzle_snippet(const uint8_t swizzle[4],
121 char snippet[DEST_SWIZZLE_SNIPPET_SIZE])
122 {
123 static const uint8_t invalid_swizzle = 0xff;
124 ssize_t si = 0;
125 uint8_t inverse[4] = {invalid_swizzle, invalid_swizzle, invalid_swizzle,
126 invalid_swizzle};
127
128 for (int i = 0; i < 4; ++i) {
129 if (swizzle[i] > 3) continue;
130 if (inverse[swizzle[i]] == invalid_swizzle)
131 inverse[swizzle[i]] = i;
132 }
133
134 for (int i = 0; i < 4; ++i) {
135 int res = -1;
136 if (inverse[i] > 3) {
137 /* Use 0.0f for unused color values, 1.0f for an unused alpha value */
138 res = snprintf(&snippet[si], DEST_SWIZZLE_SNIPPET_SIZE - si,
139 i < 3 ? "0.0f, " : "1.0f");
140 } else {
141 res = snprintf(&snippet[si], DEST_SWIZZLE_SNIPPET_SIZE - si,
142 "texel.%c%s", "rgba"[inverse[i]], i < 3 ? ", " : "");
143 }
144 si += res > 0 ? res : 0;
145 }
146 }
147
vec4_type_for_tgsi_ret(enum tgsi_return_type tgsi_ret)148 static const char *vec4_type_for_tgsi_ret(enum tgsi_return_type tgsi_ret)
149 {
150 switch (tgsi_ret) {
151 case TGSI_RETURN_TYPE_SINT: return "ivec4";
152 case TGSI_RETURN_TYPE_UINT: return "uvec4";
153 default: return "vec4";
154 }
155 }
156
tgsi_ret_for_format(enum virgl_formats format)157 static enum tgsi_return_type tgsi_ret_for_format(enum virgl_formats format)
158 {
159 if (util_format_is_pure_uint(format))
160 return TGSI_RETURN_TYPE_UINT;
161 else if (util_format_is_pure_sint(format))
162 return TGSI_RETURN_TYPE_SINT;
163
164 return TGSI_RETURN_TYPE_UNORM;
165 }
166
blit_build_frag_tex_col(struct vrend_blitter_ctx * blit_ctx,int tgsi_tex_target,enum tgsi_return_type tgsi_ret,const uint8_t swizzle[4])167 static GLuint blit_build_frag_tex_col(struct vrend_blitter_ctx *blit_ctx,
168 int tgsi_tex_target,
169 enum tgsi_return_type tgsi_ret,
170 const uint8_t swizzle[4])
171 {
172 GLuint fs_id;
173 char shader_buf[4096];
174 int is_shad;
175 const char *twm;
176 const char *ext_str = "";
177 char dest_swizzle_snippet[DEST_SWIZZLE_SNIPPET_SIZE] = "texel";
178 switch (tgsi_tex_target) {
179 case TGSI_TEXTURE_1D:
180 case TGSI_TEXTURE_BUFFER:
181 twm = ".x";
182 break;
183 case TGSI_TEXTURE_1D_ARRAY:
184 case TGSI_TEXTURE_2D:
185 case TGSI_TEXTURE_RECT:
186 case TGSI_TEXTURE_2D_MSAA:
187 default:
188 twm = ".xy";
189 break;
190 case TGSI_TEXTURE_SHADOW1D:
191 case TGSI_TEXTURE_SHADOW2D:
192 case TGSI_TEXTURE_SHADOW1D_ARRAY:
193 case TGSI_TEXTURE_SHADOWRECT:
194 case TGSI_TEXTURE_3D:
195 case TGSI_TEXTURE_CUBE:
196 case TGSI_TEXTURE_2D_ARRAY:
197 case TGSI_TEXTURE_2D_ARRAY_MSAA:
198 twm = ".xyz";
199 break;
200 case TGSI_TEXTURE_SHADOWCUBE:
201 case TGSI_TEXTURE_SHADOW2D_ARRAY:
202 case TGSI_TEXTURE_SHADOWCUBE_ARRAY:
203 case TGSI_TEXTURE_CUBE_ARRAY:
204 twm = "";
205 break;
206 }
207
208 if (tgsi_tex_target == TGSI_TEXTURE_CUBE_ARRAY ||
209 tgsi_tex_target == TGSI_TEXTURE_SHADOWCUBE_ARRAY)
210 ext_str = "#extension GL_ARB_texture_cube_map_array : require\n";
211
212 if (swizzle)
213 create_dest_swizzle_snippet(swizzle, dest_swizzle_snippet);
214
215 snprintf(shader_buf, 4096, blit_ctx->use_gles ? FS_TEXFETCH_COL_GLES : FS_TEXFETCH_COL_GL,
216 ext_str, vec4_type_for_tgsi_ret(tgsi_ret),
217 vrend_shader_samplerreturnconv(tgsi_ret),
218 vrend_shader_samplertypeconv(tgsi_tex_target, &is_shad), twm,
219 dest_swizzle_snippet);
220
221 fs_id = glCreateShader(GL_FRAGMENT_SHADER);
222
223 if (!build_and_check(fs_id, shader_buf)) {
224 glDeleteShader(fs_id);
225 return 0;
226 }
227
228 return fs_id;
229 }
230
blit_build_frag_tex_col_msaa(struct vrend_blitter_ctx * blit_ctx,int tgsi_tex_target,enum tgsi_return_type tgsi_ret,const uint8_t swizzle[4],int nr_samples)231 static GLuint blit_build_frag_tex_col_msaa(struct vrend_blitter_ctx *blit_ctx,
232 int tgsi_tex_target,
233 enum tgsi_return_type tgsi_ret,
234 const uint8_t swizzle[4],
235 int nr_samples)
236 {
237 GLuint fs_id;
238 char shader_buf[4096];
239 int is_shad;
240 const char *twm;
241 const char *ivec;
242 char dest_swizzle_snippet[DEST_SWIZZLE_SNIPPET_SIZE] = "texel";
243 const char *ext_str = blit_ctx->use_gles ? "" :
244 "#extension GL_ARB_texture_multisample : enable\n";
245
246 switch (tgsi_tex_target) {
247 case TGSI_TEXTURE_2D_MSAA:
248 twm = ".xy";
249 ivec = "ivec2";
250 break;
251 case TGSI_TEXTURE_2D_ARRAY_MSAA:
252 twm = ".xyz";
253 ivec = "ivec3";
254 break;
255 default:
256 return 0;
257 }
258
259 if (swizzle)
260 create_dest_swizzle_snippet(swizzle, dest_swizzle_snippet);
261
262 snprintf(shader_buf, 4096,
263 blit_ctx->use_gles ? FS_TEXFETCH_COL_MSAA_GLES : FS_TEXFETCH_COL_MSAA_GL,
264 ext_str, vec4_type_for_tgsi_ret(tgsi_ret),
265 vrend_shader_samplerreturnconv(tgsi_ret),
266 vrend_shader_samplertypeconv(tgsi_tex_target, &is_shad),
267 nr_samples, ivec, twm, dest_swizzle_snippet);
268
269 fs_id = glCreateShader(GL_FRAGMENT_SHADER);
270
271 if (!build_and_check(fs_id, shader_buf)) {
272 glDeleteShader(fs_id);
273 return 0;
274 }
275
276 return fs_id;
277 }
278
blit_build_frag_tex_writedepth(struct vrend_blitter_ctx * blit_ctx,int tgsi_tex_target)279 static GLuint blit_build_frag_tex_writedepth(struct vrend_blitter_ctx *blit_ctx, int tgsi_tex_target)
280 {
281 GLuint fs_id;
282 char shader_buf[4096];
283 int is_shad;
284 const char *twm;
285
286 switch (tgsi_tex_target) {
287 case TGSI_TEXTURE_1D:
288 case TGSI_TEXTURE_BUFFER:
289 twm = ".x";
290 break;
291 case TGSI_TEXTURE_1D_ARRAY:
292 case TGSI_TEXTURE_2D:
293 case TGSI_TEXTURE_RECT:
294 case TGSI_TEXTURE_2D_MSAA:
295 default:
296 twm = ".xy";
297 break;
298 case TGSI_TEXTURE_SHADOW1D:
299 case TGSI_TEXTURE_SHADOW2D:
300 case TGSI_TEXTURE_SHADOW1D_ARRAY:
301 case TGSI_TEXTURE_SHADOWRECT:
302 case TGSI_TEXTURE_3D:
303 case TGSI_TEXTURE_CUBE:
304 case TGSI_TEXTURE_2D_ARRAY:
305 case TGSI_TEXTURE_2D_ARRAY_MSAA:
306 twm = ".xyz";
307 break;
308 case TGSI_TEXTURE_SHADOWCUBE:
309 case TGSI_TEXTURE_SHADOW2D_ARRAY:
310 case TGSI_TEXTURE_SHADOWCUBE_ARRAY:
311 case TGSI_TEXTURE_CUBE_ARRAY:
312 twm = "";
313 break;
314 }
315
316 snprintf(shader_buf, 4096, blit_ctx->use_gles ? FS_TEXFETCH_DS_GLES : FS_TEXFETCH_DS_GL,
317 vrend_shader_samplertypeconv(tgsi_tex_target, &is_shad), twm);
318
319 fs_id = glCreateShader(GL_FRAGMENT_SHADER);
320
321 if (!build_and_check(fs_id, shader_buf)) {
322 glDeleteShader(fs_id);
323 return 0;
324 }
325
326 return fs_id;
327 }
328
blit_build_frag_blit_msaa_depth(struct vrend_blitter_ctx * blit_ctx,int tgsi_tex_target)329 static GLuint blit_build_frag_blit_msaa_depth(struct vrend_blitter_ctx *blit_ctx, int tgsi_tex_target)
330 {
331 GLuint fs_id;
332 char shader_buf[4096];
333 int is_shad;
334 const char *twm;
335 const char *ivec;
336
337 switch (tgsi_tex_target) {
338 case TGSI_TEXTURE_2D_MSAA:
339 twm = ".xy";
340 ivec = "ivec2";
341 break;
342 case TGSI_TEXTURE_2D_ARRAY_MSAA:
343 twm = ".xyz";
344 ivec = "ivec3";
345 break;
346 default:
347 return 0;
348 }
349
350 snprintf(shader_buf, 4096, blit_ctx->use_gles ? FS_TEXFETCH_DS_MSAA_GLES : FS_TEXFETCH_DS_MSAA_GL,
351 vrend_shader_samplertypeconv(tgsi_tex_target, &is_shad), ivec, twm);
352
353 fs_id = glCreateShader(GL_FRAGMENT_SHADER);
354
355 if (!build_and_check(fs_id, shader_buf)) {
356 glDeleteShader(fs_id);
357 return 0;
358 }
359
360 return fs_id;
361 }
362
blit_get_frag_tex_writedepth(struct vrend_blitter_ctx * blit_ctx,int pipe_tex_target,unsigned nr_samples)363 static GLuint blit_get_frag_tex_writedepth(struct vrend_blitter_ctx *blit_ctx, int pipe_tex_target, unsigned nr_samples)
364 {
365 assert(pipe_tex_target < PIPE_MAX_TEXTURE_TYPES);
366
367 if (nr_samples > 1) {
368 GLuint *shader = &blit_ctx->fs_texfetch_depth_msaa[pipe_tex_target];
369
370 if (!*shader) {
371 unsigned tgsi_tex = util_pipe_tex_to_tgsi_tex(pipe_tex_target, nr_samples);
372
373 *shader = blit_build_frag_blit_msaa_depth(blit_ctx, tgsi_tex);
374 }
375 return *shader;
376
377 } else {
378 GLuint *shader = &blit_ctx->fs_texfetch_depth[pipe_tex_target];
379
380 if (!*shader) {
381 unsigned tgsi_tex = util_pipe_tex_to_tgsi_tex(pipe_tex_target, 0);
382
383 *shader = blit_build_frag_tex_writedepth(blit_ctx, tgsi_tex);
384 }
385 return *shader;
386 }
387 }
388
blit_get_frag_tex_col(struct vrend_blitter_ctx * blit_ctx,int pipe_tex_target,unsigned nr_samples,const struct vrend_format_table * src_entry,const struct vrend_format_table * dst_entry)389 static GLuint blit_get_frag_tex_col(struct vrend_blitter_ctx *blit_ctx,
390 int pipe_tex_target,
391 unsigned nr_samples,
392 const struct vrend_format_table *src_entry,
393 const struct vrend_format_table *dst_entry)
394 {
395 assert(pipe_tex_target < PIPE_MAX_TEXTURE_TYPES);
396
397 bool needs_swizzle = dst_entry->flags & VIRGL_BIND_NEED_SWIZZLE;
398
399 if (needs_swizzle || nr_samples > 1) {
400 const uint8_t *swizzle = needs_swizzle ? dst_entry->swizzle : NULL;
401 GLuint *shader = &blit_ctx->fs_texfetch_col_swizzle;
402 if (shader) {
403 glDeleteShader(*shader);
404 }
405
406 unsigned tgsi_tex = util_pipe_tex_to_tgsi_tex(pipe_tex_target, nr_samples);
407 enum tgsi_return_type tgsi_ret = tgsi_ret_for_format(src_entry->format);
408
409 if (nr_samples > 1) {
410 // Integer textures are resolved using just one sample
411 int msaa_samples = tgsi_ret == TGSI_RETURN_TYPE_UNORM ? nr_samples : 1;
412 *shader = blit_build_frag_tex_col_msaa(blit_ctx, tgsi_tex, tgsi_ret,
413 swizzle, msaa_samples);
414 } else {
415 *shader = blit_build_frag_tex_col(blit_ctx, tgsi_tex, tgsi_ret, swizzle);
416 }
417
418 return *shader;
419 } else {
420 GLuint *shader = &blit_ctx->fs_texfetch_col[pipe_tex_target];
421
422 if (!*shader) {
423 unsigned tgsi_tex = util_pipe_tex_to_tgsi_tex(pipe_tex_target, 0);
424 enum tgsi_return_type tgsi_ret = tgsi_ret_for_format(src_entry->format);
425
426 *shader = blit_build_frag_tex_col(blit_ctx, tgsi_tex, tgsi_ret, NULL);
427 }
428 return *shader;
429 }
430 }
431
vrend_renderer_init_blit_ctx(struct vrend_blitter_ctx * blit_ctx)432 static void vrend_renderer_init_blit_ctx(struct vrend_blitter_ctx *blit_ctx)
433 {
434 struct virgl_gl_ctx_param ctx_params;
435 int i;
436 if (blit_ctx->initialised) {
437 vrend_clicbs->make_current(0, blit_ctx->gl_context);
438 return;
439 }
440
441 blit_ctx->initialised = true;
442 blit_ctx->use_gles = epoxy_is_desktop_gl() == 0;
443 ctx_params.shared = true;
444 for (uint32_t i = 0; i < ARRAY_SIZE(gl_versions); i++) {
445 ctx_params.major_ver = gl_versions[i].major;
446 ctx_params.minor_ver = gl_versions[i].minor;
447
448 blit_ctx->gl_context = vrend_clicbs->create_gl_context(0, &ctx_params);
449 if (blit_ctx->gl_context)
450 break;
451 }
452
453 vrend_clicbs->make_current(0, blit_ctx->gl_context);
454 glGenVertexArrays(1, &blit_ctx->vaoid);
455 glGenFramebuffers(1, &blit_ctx->fb_id);
456
457 glGenBuffers(1, &blit_ctx->vbo_id);
458 blit_build_vs_passthrough(blit_ctx);
459
460 for (i = 0; i < 4; i++)
461 blit_ctx->vertices[i][0][3] = 1; /*v.w*/
462 glBindVertexArray(blit_ctx->vaoid);
463 glBindBuffer(GL_ARRAY_BUFFER, blit_ctx->vbo_id);
464
465 if (!blit_ctx->use_gles)
466 glEnable(GL_FRAMEBUFFER_SRGB);
467 blit_ctx->framebuffer_srgb_enabled = true;
468 }
469
convert_mag_filter(unsigned int filter)470 static inline GLenum convert_mag_filter(unsigned int filter)
471 {
472 if (filter == PIPE_TEX_FILTER_NEAREST)
473 return GL_NEAREST;
474 return GL_LINEAR;
475 }
476
blitter_set_dst_dim(struct vrend_blitter_ctx * blit_ctx,unsigned width,unsigned height)477 static void blitter_set_dst_dim(struct vrend_blitter_ctx *blit_ctx,
478 unsigned width, unsigned height)
479 {
480 blit_ctx->dst_width = width;
481 blit_ctx->dst_height = height;
482 }
483
blitter_set_rectangle(struct vrend_blitter_ctx * blit_ctx,int x1,int y1,int x2,int y2,float depth)484 static void blitter_set_rectangle(struct vrend_blitter_ctx *blit_ctx,
485 int x1, int y1, int x2, int y2,
486 float depth)
487 {
488 int i;
489
490 /* set vertex positions */
491 blit_ctx->vertices[0][0][0] = (float)x1 / blit_ctx->dst_width * 2.0f - 1.0f; /*v0.x*/
492 blit_ctx->vertices[0][0][1] = (float)y1 / blit_ctx->dst_height * 2.0f - 1.0f; /*v0.y*/
493
494 blit_ctx->vertices[1][0][0] = (float)x2 / blit_ctx->dst_width * 2.0f - 1.0f; /*v1.x*/
495 blit_ctx->vertices[1][0][1] = (float)y1 / blit_ctx->dst_height * 2.0f - 1.0f; /*v1.y*/
496
497 blit_ctx->vertices[2][0][0] = (float)x2 / blit_ctx->dst_width * 2.0f - 1.0f; /*v2.x*/
498 blit_ctx->vertices[2][0][1] = (float)y2 / blit_ctx->dst_height * 2.0f - 1.0f; /*v2.y*/
499
500 blit_ctx->vertices[3][0][0] = (float)x1 / blit_ctx->dst_width * 2.0f - 1.0f; /*v3.x*/
501 blit_ctx->vertices[3][0][1] = (float)y2 / blit_ctx->dst_height * 2.0f - 1.0f; /*v3.y*/
502
503 for (i = 0; i < 4; i++)
504 blit_ctx->vertices[i][0][2] = depth; /*z*/
505
506 glViewport(0, 0, blit_ctx->dst_width, blit_ctx->dst_height);
507 }
508
get_texcoords(struct vrend_resource * src_res,int src_level,int x1,int y1,int x2,int y2,float out[4])509 static void get_texcoords(struct vrend_resource *src_res,
510 int src_level,
511 int x1, int y1, int x2, int y2,
512 float out[4])
513 {
514 bool normalized = src_res->base.target != PIPE_TEXTURE_RECT &&
515 src_res->base.nr_samples <= 1;
516
517 if (normalized) {
518 out[0] = x1 / (float)u_minify(src_res->base.width0, src_level);
519 out[1] = y1 / (float)u_minify(src_res->base.height0, src_level);
520 out[2] = x2 / (float)u_minify(src_res->base.width0, src_level);
521 out[3] = y2 / (float)u_minify(src_res->base.height0, src_level);
522 } else {
523 out[0] = (float) x1;
524 out[1] = (float) y1;
525 out[2] = (float) x2;
526 out[3] = (float) y2;
527 }
528 }
set_texcoords_in_vertices(const float coord[4],float * out,unsigned stride)529 static void set_texcoords_in_vertices(const float coord[4],
530 float *out, unsigned stride)
531 {
532 out[0] = coord[0]; /*t0.s*/
533 out[1] = coord[1]; /*t0.t*/
534 out += stride;
535 out[0] = coord[2]; /*t1.s*/
536 out[1] = coord[1]; /*t1.t*/
537 out += stride;
538 out[0] = coord[2]; /*t2.s*/
539 out[1] = coord[3]; /*t2.t*/
540 out += stride;
541 out[0] = coord[0]; /*t3.s*/
542 out[1] = coord[3]; /*t3.t*/
543 }
544
blitter_set_texcoords(struct vrend_blitter_ctx * blit_ctx,struct vrend_resource * src_res,int level,float layer,unsigned sample,int x1,int y1,int x2,int y2)545 static void blitter_set_texcoords(struct vrend_blitter_ctx *blit_ctx,
546 struct vrend_resource *src_res,
547 int level,
548 float layer, unsigned sample,
549 int x1, int y1, int x2, int y2)
550 {
551 float coord[4];
552 float face_coord[4][2];
553 int i;
554 get_texcoords(src_res, level, x1, y1, x2, y2, coord);
555
556 if (src_res->base.target == PIPE_TEXTURE_CUBE ||
557 src_res->base.target == PIPE_TEXTURE_CUBE_ARRAY) {
558 set_texcoords_in_vertices(coord, &face_coord[0][0], 2);
559 util_map_texcoords2d_onto_cubemap((unsigned)layer % 6,
560 /* pointer, stride in floats */
561 &face_coord[0][0], 2,
562 &blit_ctx->vertices[0][1][0], 8,
563 FALSE);
564 } else {
565 set_texcoords_in_vertices(coord, &blit_ctx->vertices[0][1][0], 8);
566 }
567
568 switch (src_res->base.target) {
569 case PIPE_TEXTURE_3D:
570 {
571 float r = layer / (float)u_minify(src_res->base.depth0,
572 level);
573 for (i = 0; i < 4; i++)
574 blit_ctx->vertices[i][1][2] = r; /*r*/
575 }
576 break;
577
578 case PIPE_TEXTURE_1D_ARRAY:
579 for (i = 0; i < 4; i++)
580 blit_ctx->vertices[i][1][1] = (float) layer; /*t*/
581 break;
582
583 case PIPE_TEXTURE_2D_ARRAY:
584 for (i = 0; i < 4; i++) {
585 blit_ctx->vertices[i][1][2] = (float) layer; /*r*/
586 blit_ctx->vertices[i][1][3] = (float) sample; /*q*/
587 }
588 break;
589 case PIPE_TEXTURE_CUBE_ARRAY:
590 for (i = 0; i < 4; i++)
591 blit_ctx->vertices[i][1][3] = (float) ((unsigned)layer / 6); /*w*/
592 break;
593 case PIPE_TEXTURE_2D:
594 for (i = 0; i < 4; i++) {
595 blit_ctx->vertices[i][1][3] = (float) sample; /*r*/
596 }
597 break;
598 default:;
599 }
600 }
601 #if 0
602 static void set_dsa_keep_depth_stencil(void)
603 {
604 glDisable(GL_STENCIL_TEST);
605 glDisable(GL_DEPTH_TEST);
606 glDepthMask(GL_FALSE);
607 }
608 #endif
609
set_dsa_write_depth_keep_stencil(void)610 static void set_dsa_write_depth_keep_stencil(void)
611 {
612 glDisable(GL_STENCIL_TEST);
613 glEnable(GL_DEPTH_TEST);
614 glDepthFunc(GL_ALWAYS);
615 glDepthMask(GL_TRUE);
616 }
617
to_gl_swizzle(int swizzle)618 static inline GLenum to_gl_swizzle(int swizzle)
619 {
620 switch (swizzle) {
621 case PIPE_SWIZZLE_RED: return GL_RED;
622 case PIPE_SWIZZLE_GREEN: return GL_GREEN;
623 case PIPE_SWIZZLE_BLUE: return GL_BLUE;
624 case PIPE_SWIZZLE_ALPHA: return GL_ALPHA;
625 case PIPE_SWIZZLE_ZERO: return GL_ZERO;
626 case PIPE_SWIZZLE_ONE: return GL_ONE;
627 default:
628 assert(0);
629 return 0;
630 }
631 }
632
633 /* Calculate the delta required to keep 'v' within [0, max] */
calc_delta_for_bound(int v,int max)634 static int calc_delta_for_bound(int v, int max)
635 {
636 int delta = 0;
637
638 if (v < 0)
639 delta = -v;
640 else if (v > max)
641 delta = - (v - max);
642
643 return delta;
644 }
645
646 /* Calculate the deltas for the source blit region points in order to bound
647 * them within the source resource extents */
calc_src_deltas_for_bounds(struct vrend_resource * src_res,const struct pipe_blit_info * info,struct vrend_blitter_delta * src0_delta,struct vrend_blitter_delta * src1_delta)648 static void calc_src_deltas_for_bounds(struct vrend_resource *src_res,
649 const struct pipe_blit_info *info,
650 struct vrend_blitter_delta *src0_delta,
651 struct vrend_blitter_delta *src1_delta)
652 {
653 int max_x = u_minify(src_res->base.width0, info->src.level) - 1;
654 int max_y = u_minify(src_res->base.height0, info->src.level) - 1;
655
656 /* Whether the bounds for the coordinates of a point are inclusive or
657 * exclusive depends on the direction of the blit read. Adjust the max
658 * bounds accordingly, with an adjustment of 0 for inclusive, and 1 for
659 * exclusive. */
660 int src0_x_excl = info->src.box.width < 0;
661 int src0_y_excl = info->src.box.height < 0;
662
663 src0_delta->dx = calc_delta_for_bound(info->src.box.x, max_x + src0_x_excl);
664 src0_delta->dy = calc_delta_for_bound(info->src.box.y, max_y + src0_y_excl);
665
666 src1_delta->dx = calc_delta_for_bound(info->src.box.x + info->src.box.width,
667 max_x + !src0_x_excl);
668 src1_delta->dy = calc_delta_for_bound(info->src.box.y + info->src.box.height,
669 max_y + !src0_y_excl);
670 }
671
672 /* Calculate dst delta values to adjust the dst points for any changes in the
673 * src points */
calc_dst_deltas_from_src(const struct pipe_blit_info * info,const struct vrend_blitter_delta * src0_delta,const struct vrend_blitter_delta * src1_delta,struct vrend_blitter_delta * dst0_delta,struct vrend_blitter_delta * dst1_delta)674 static void calc_dst_deltas_from_src(const struct pipe_blit_info *info,
675 const struct vrend_blitter_delta *src0_delta,
676 const struct vrend_blitter_delta *src1_delta,
677 struct vrend_blitter_delta *dst0_delta,
678 struct vrend_blitter_delta *dst1_delta)
679 {
680 float scale_x = (float)info->dst.box.width / (float)info->src.box.width;
681 float scale_y = (float)info->dst.box.height / (float)info->src.box.height;
682
683 dst0_delta->dx = src0_delta->dx * scale_x;
684 dst0_delta->dy = src0_delta->dy * scale_y;
685
686 dst1_delta->dx = src1_delta->dx * scale_x;
687 dst1_delta->dy = src1_delta->dy * scale_y;
688 }
689
690 /* implement blitting using OpenGL. */
vrend_renderer_blit_gl(UNUSED struct vrend_context * ctx,struct vrend_resource * src_res,struct vrend_resource * dst_res,const struct pipe_blit_info * info,bool has_texture_srgb_decode)691 void vrend_renderer_blit_gl(UNUSED struct vrend_context *ctx,
692 struct vrend_resource *src_res,
693 struct vrend_resource *dst_res,
694 const struct pipe_blit_info *info,
695 bool has_texture_srgb_decode)
696 {
697 struct vrend_blitter_ctx *blit_ctx = &vrend_blit_ctx;
698 GLuint buffers;
699 GLuint prog_id;
700 GLuint fs_id;
701 GLint lret;
702 GLenum filter;
703 GLuint pos_loc, tc_loc;
704 GLuint samp_loc;
705 bool has_depth, has_stencil;
706 bool blit_stencil, blit_depth;
707 int dst_z;
708 struct vrend_blitter_delta src0_delta, src1_delta, dst0_delta, dst1_delta;
709 struct vrend_blitter_point src0, src1, dst0, dst1;
710 const struct util_format_description *src_desc =
711 util_format_description(src_res->base.format);
712 const struct util_format_description *dst_desc =
713 util_format_description(dst_res->base.format);
714 const struct vrend_format_table *src_entry =
715 vrend_get_format_table_entry(info->src.format);
716 const struct vrend_format_table *dst_entry =
717 vrend_get_format_table_entry(info->dst.format);
718
719 has_depth = util_format_has_depth(src_desc) &&
720 util_format_has_depth(dst_desc);
721 has_stencil = util_format_has_stencil(src_desc) &&
722 util_format_has_stencil(dst_desc);
723
724 blit_depth = has_depth && (info->mask & PIPE_MASK_Z);
725 blit_stencil = has_stencil && (info->mask & PIPE_MASK_S) & 0;
726
727 filter = convert_mag_filter(info->filter);
728 vrend_renderer_init_blit_ctx(blit_ctx);
729
730 blitter_set_dst_dim(blit_ctx,
731 u_minify(dst_res->base.width0, info->dst.level),
732 u_minify(dst_res->base.height0, info->dst.level));
733
734 /* Calculate src and dst points taking deltas into account */
735 calc_src_deltas_for_bounds(src_res, info, &src0_delta, &src1_delta);
736 calc_dst_deltas_from_src(info, &src0_delta, &src1_delta, &dst0_delta, &dst1_delta);
737
738 src0.x = info->src.box.x + src0_delta.dx;
739 src0.y = info->src.box.y + src0_delta.dy;
740 src1.x = info->src.box.x + info->src.box.width + src1_delta.dx;
741 src1.y = info->src.box.y + info->src.box.height + src1_delta.dy;
742
743 dst0.x = info->dst.box.x + dst0_delta.dx;
744 dst0.y = info->dst.box.y + dst0_delta.dy;
745 dst1.x = info->dst.box.x + info->dst.box.width + dst1_delta.dx;
746 dst1.y = info->dst.box.y + info->dst.box.height + dst1_delta.dy;
747
748 blitter_set_rectangle(blit_ctx, dst0.x, dst0.y, dst1.x, dst1.y, 0);
749
750 prog_id = glCreateProgram();
751 glAttachShader(prog_id, blit_ctx->vs);
752
753 if (blit_depth || blit_stencil) {
754 fs_id = blit_get_frag_tex_writedepth(blit_ctx, src_res->base.target,
755 src_res->base.nr_samples);
756 } else {
757 fs_id = blit_get_frag_tex_col(blit_ctx, src_res->base.target,
758 src_res->base.nr_samples,
759 src_entry, dst_entry);
760 }
761 glAttachShader(prog_id, fs_id);
762
763 glLinkProgram(prog_id);
764 glGetProgramiv(prog_id, GL_LINK_STATUS, &lret);
765 if (lret == GL_FALSE) {
766 char infolog[65536];
767 int len;
768 glGetProgramInfoLog(prog_id, 65536, &len, infolog);
769 fprintf(stderr,"got error linking\n%s\n", infolog);
770 /* dump shaders */
771 glDeleteProgram(prog_id);
772 return;
773 }
774
775 glUseProgram(prog_id);
776
777 glBindFramebuffer(GL_FRAMEBUFFER_EXT, blit_ctx->fb_id);
778 vrend_fb_bind_texture(dst_res, 0, info->dst.level, info->dst.box.z);
779
780 buffers = GL_COLOR_ATTACHMENT0_EXT;
781 glDrawBuffers(1, &buffers);
782
783 glBindTexture(src_res->target, src_res->id);
784
785 if (src_entry->flags & VIRGL_BIND_NEED_SWIZZLE) {
786 glTexParameteri(src_res->target, GL_TEXTURE_SWIZZLE_R,
787 to_gl_swizzle(src_entry->swizzle[0]));
788 glTexParameteri(src_res->target, GL_TEXTURE_SWIZZLE_G,
789 to_gl_swizzle(src_entry->swizzle[1]));
790 glTexParameteri(src_res->target, GL_TEXTURE_SWIZZLE_B,
791 to_gl_swizzle(src_entry->swizzle[2]));
792 glTexParameteri(src_res->target, GL_TEXTURE_SWIZZLE_A,
793 to_gl_swizzle(src_entry->swizzle[3]));
794 }
795
796 /* Just make sure that no stale state disabled decoding */
797 if (has_texture_srgb_decode && util_format_is_srgb(src_res->base.format))
798 glTexParameteri(src_res->target, GL_TEXTURE_SRGB_DECODE_EXT, GL_DECODE_EXT);
799
800 glTexParameteri(src_res->target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
801 glTexParameteri(src_res->target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
802 glTexParameteri(src_res->target, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
803
804 glTexParameteri(src_res->target, GL_TEXTURE_BASE_LEVEL, info->src.level);
805 glTexParameteri(src_res->target, GL_TEXTURE_MAX_LEVEL, info->src.level);
806 glTexParameterf(src_res->target, GL_TEXTURE_MAG_FILTER, filter);
807 glTexParameterf(src_res->target, GL_TEXTURE_MIN_FILTER, filter);
808 pos_loc = glGetAttribLocation(prog_id, "arg0");
809 tc_loc = glGetAttribLocation(prog_id, "arg1");
810 samp_loc = glGetUniformLocation(prog_id, "samp");
811
812 glUniform1i(samp_loc, 0);
813
814 glVertexAttribPointer(pos_loc, 4, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void *)0);
815 glVertexAttribPointer(tc_loc, 4, GL_FLOAT, GL_FALSE, 8 * sizeof(float), (void *)(4 * sizeof(float)));
816
817 glEnableVertexAttribArray(pos_loc);
818 glEnableVertexAttribArray(tc_loc);
819
820 set_dsa_write_depth_keep_stencil();
821
822 for (dst_z = 0; dst_z < info->dst.box.depth; dst_z++) {
823 float dst2src_scale = info->src.box.depth / (float)info->dst.box.depth;
824 float dst_offset = ((info->src.box.depth - 1) -
825 (info->dst.box.depth - 1) * dst2src_scale) * 0.5;
826 float src_z = (dst_z + dst_offset) * dst2src_scale;
827 uint32_t layer = (dst_res->target == GL_TEXTURE_CUBE_MAP) ? info->dst.box.z : dst_z;
828
829 glBindFramebuffer(GL_FRAMEBUFFER_EXT, blit_ctx->fb_id);
830 vrend_fb_bind_texture(dst_res, 0, info->dst.level, layer);
831
832 buffers = GL_COLOR_ATTACHMENT0_EXT;
833 glDrawBuffers(1, &buffers);
834 blitter_set_texcoords(blit_ctx, src_res, info->src.level,
835 info->src.box.z + src_z, 0,
836 src0.x, src0.y, src1.x, src1.y);
837
838 glBufferData(GL_ARRAY_BUFFER, sizeof(blit_ctx->vertices), blit_ctx->vertices, GL_STATIC_DRAW);
839 glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
840 }
841 glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_STENCIL_ATTACHMENT,
842 GL_TEXTURE_2D, 0, 0);
843 glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0,
844 GL_TEXTURE_2D, 0, 0);
845 }