xorg_renderer.c revision 711476be2904bd16d45b424236d6aefa9a9e6bc9 
1#include "xorg_exa.h"
2#include "xorg_renderer.h"
3
4#include "xorg_exa_tgsi.h"
5
6#include "cso_cache/cso_context.h"
7#include "util/u_draw_quad.h"
8#include "util/u_math.h"
9#include "util/u_memory.h"
10#include "util/u_rect.h"
11
12#include "util/u_inlines.h"
13
14#include <math.h>
15
16#define floatsEqual(x, y) (fabs(x - y) <= 0.00001f * MIN2(fabs(x), fabs(y)))
17#define floatIsZero(x) (floatsEqual((x) + 1, 1))
18
19#define NUM_COMPONENTS 4
20
21static INLINE boolean is_affine(float *matrix)
22{
23   return floatIsZero(matrix[2]) && floatIsZero(matrix[5])
24      && floatsEqual(matrix[8], 1);
25}
26static INLINE void map_point(float *mat, float x, float y,
27                             float *out_x, float *out_y)
28{
29   if (!mat) {
30      *out_x = x;
31      *out_y = y;
32      return;
33   }
34
35   *out_x = mat[0]*x + mat[3]*y + mat[6];
36   *out_y = mat[1]*x + mat[4]*y + mat[7];
37   if (!is_affine(mat)) {
38      float w = 1/(mat[2]*x + mat[5]*y + mat[8]);
39      *out_x *= w;
40      *out_y *= w;
41   }
42}
43
44static INLINE struct pipe_buffer *
45renderer_buffer_create(struct xorg_renderer *r)
46{
47   struct pipe_buffer *buf =
48      pipe_user_buffer_create(r->pipe->screen,
49                              r->buffer,
50                              sizeof(float)*
51                              r->buffer_size);
52   r->buffer_size = 0;
53
54   return buf;
55}
56
57static INLINE void
58renderer_draw(struct xorg_renderer *r)
59{
60   struct pipe_context *pipe = r->pipe;
61   struct pipe_buffer *buf = 0;
62   int num_verts = r->buffer_size/(r->attrs_per_vertex * NUM_COMPONENTS);
63
64   if (!r->buffer_size)
65      return;
66
67   buf = renderer_buffer_create(r);
68
69
70   if (buf) {
71      cso_set_vertex_elements(r->cso, r->attrs_per_vertex, r->velems);
72
73      util_draw_vertex_buffer(pipe, buf, 0,
74                              PIPE_PRIM_QUADS,
75                              num_verts,  /* verts */
76                              r->attrs_per_vertex); /* attribs/vert */
77
78      pipe_buffer_reference(&buf, NULL);
79   }
80}
81
82static INLINE void
83renderer_draw_conditional(struct xorg_renderer *r,
84                          int next_batch)
85{
86   if (r->buffer_size + next_batch >= BUF_SIZE ||
87       (next_batch == 0 && r->buffer_size)) {
88      renderer_draw(r);
89   }
90}
91
92static void
93renderer_init_state(struct xorg_renderer *r)
94{
95   struct pipe_depth_stencil_alpha_state dsa;
96   struct pipe_rasterizer_state raster;
97   unsigned i;
98
99   /* set common initial clip state */
100   memset(&dsa, 0, sizeof(struct pipe_depth_stencil_alpha_state));
101   cso_set_depth_stencil_alpha(r->cso, &dsa);
102
103
104   /* XXX: move to renderer_init_state? */
105   memset(&raster, 0, sizeof(struct pipe_rasterizer_state));
106   raster.gl_rasterization_rules = 1;
107   cso_set_rasterizer(r->cso, &raster);
108
109   /* vertex elements state */
110   memset(&r->velems[0], 0, sizeof(r->velems[0]) * 3);
111   for (i = 0; i < 3; i++) {
112      r->velems[i].src_offset = i * 4 * sizeof(float);
113      r->velems[i].instance_divisor = 0;
114      r->velems[i].vertex_buffer_index = 0;
115      r->velems[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
116   }
117}
118
119
120static INLINE void
121add_vertex_color(struct xorg_renderer *r,
122                 float x, float y,
123                 float color[4])
124{
125   float *vertex = r->buffer + r->buffer_size;
126
127   vertex[0] = x;
128   vertex[1] = y;
129   vertex[2] = 0.f; /*z*/
130   vertex[3] = 1.f; /*w*/
131
132   vertex[4] = color[0]; /*r*/
133   vertex[5] = color[1]; /*g*/
134   vertex[6] = color[2]; /*b*/
135   vertex[7] = color[3]; /*a*/
136
137   r->buffer_size += 8;
138}
139
140static INLINE void
141add_vertex_1tex(struct xorg_renderer *r,
142                float x, float y, float s, float t)
143{
144   float *vertex = r->buffer + r->buffer_size;
145
146   vertex[0] = x;
147   vertex[1] = y;
148   vertex[2] = 0.f; /*z*/
149   vertex[3] = 1.f; /*w*/
150
151   vertex[4] = s;   /*s*/
152   vertex[5] = t;   /*t*/
153   vertex[6] = 0.f; /*r*/
154   vertex[7] = 1.f; /*q*/
155
156   r->buffer_size += 8;
157}
158
159static void
160add_vertex_data1(struct xorg_renderer *r,
161                 float srcX, float srcY,  float dstX, float dstY,
162                 float width, float height,
163                 struct pipe_texture *src, float *src_matrix)
164{
165   float s0, t0, s1, t1, s2, t2, s3, t3;
166   float pt0[2], pt1[2], pt2[2], pt3[2];
167
168   pt0[0] = srcX;
169   pt0[1] = srcY;
170   pt1[0] = (srcX + width);
171   pt1[1] = srcY;
172   pt2[0] = (srcX + width);
173   pt2[1] = (srcY + height);
174   pt3[0] = srcX;
175   pt3[1] = (srcY + height);
176
177   if (src_matrix) {
178      map_point(src_matrix, pt0[0], pt0[1], &pt0[0], &pt0[1]);
179      map_point(src_matrix, pt1[0], pt1[1], &pt1[0], &pt1[1]);
180      map_point(src_matrix, pt2[0], pt2[1], &pt2[0], &pt2[1]);
181      map_point(src_matrix, pt3[0], pt3[1], &pt3[0], &pt3[1]);
182   }
183
184   s0 =  pt0[0] / src->width0;
185   s1 =  pt1[0] / src->width0;
186   s2 =  pt2[0] / src->width0;
187   s3 =  pt3[0] / src->width0;
188   t0 =  pt0[1] / src->height0;
189   t1 =  pt1[1] / src->height0;
190   t2 =  pt2[1] / src->height0;
191   t3 =  pt3[1] / src->height0;
192
193   /* 1st vertex */
194   add_vertex_1tex(r, dstX, dstY, s0, t0);
195   /* 2nd vertex */
196   add_vertex_1tex(r, dstX + width, dstY, s1, t1);
197   /* 3rd vertex */
198   add_vertex_1tex(r, dstX + width, dstY + height, s2, t2);
199   /* 4th vertex */
200   add_vertex_1tex(r, dstX, dstY + height, s3, t3);
201}
202
203
204static INLINE void
205add_vertex_2tex(struct xorg_renderer *r,
206                float x, float y,
207                float s0, float t0, float s1, float t1)
208{
209   float *vertex = r->buffer + r->buffer_size;
210
211   vertex[0] = x;
212   vertex[1] = y;
213   vertex[2] = 0.f; /*z*/
214   vertex[3] = 1.f; /*w*/
215
216   vertex[4] = s0;  /*s*/
217   vertex[5] = t0;  /*t*/
218   vertex[6] = 0.f; /*r*/
219   vertex[7] = 1.f; /*q*/
220
221   vertex[8] = s1;  /*s*/
222   vertex[9] = t1;  /*t*/
223   vertex[10] = 0.f; /*r*/
224   vertex[11] = 1.f; /*q*/
225
226   r->buffer_size += 12;
227}
228
229static void
230add_vertex_data2(struct xorg_renderer *r,
231                 float srcX, float srcY, float maskX, float maskY,
232                 float dstX, float dstY, float width, float height,
233                 struct pipe_texture *src,
234                 struct pipe_texture *mask,
235                 float *src_matrix, float *mask_matrix)
236{
237   float src_s0, src_t0, src_s1, src_t1;
238   float mask_s0, mask_t0, mask_s1, mask_t1;
239   float spt0[2], spt1[2];
240   float mpt0[2], mpt1[2];
241
242   spt0[0] = srcX;
243   spt0[1] = srcY;
244   spt1[0] = srcX + width;
245   spt1[1] = srcY + height;
246
247   mpt0[0] = maskX;
248   mpt0[1] = maskY;
249   mpt1[0] = maskX + width;
250   mpt1[1] = maskY + height;
251
252   if (src_matrix) {
253      map_point(src_matrix, spt0[0], spt0[1], &spt0[0], &spt0[1]);
254      map_point(src_matrix, spt1[0], spt1[1], &spt1[0], &spt1[1]);
255   }
256
257   if (mask_matrix) {
258      map_point(mask_matrix, mpt0[0], mpt0[1], &mpt0[0], &mpt0[1]);
259      map_point(mask_matrix, mpt1[0], mpt1[1], &mpt1[0], &mpt1[1]);
260   }
261
262   src_s0 = spt0[0] / src->width0;
263   src_t0 = spt0[1] / src->height0;
264   src_s1 = spt1[0] / src->width0;
265   src_t1 = spt1[1] / src->height0;
266
267   mask_s0 = mpt0[0] / mask->width0;
268   mask_t0 = mpt0[1] / mask->height0;
269   mask_s1 = mpt1[0] / mask->width0;
270   mask_t1 = mpt1[1] / mask->height0;
271
272   /* 1st vertex */
273   add_vertex_2tex(r, dstX, dstY,
274                   src_s0, src_t0, mask_s0, mask_t0);
275   /* 2nd vertex */
276   add_vertex_2tex(r, dstX + width, dstY,
277                   src_s1, src_t0, mask_s1, mask_t0);
278   /* 3rd vertex */
279   add_vertex_2tex(r, dstX + width, dstY + height,
280                   src_s1, src_t1, mask_s1, mask_t1);
281   /* 4th vertex */
282   add_vertex_2tex(r, dstX, dstY + height,
283                   src_s0, src_t1, mask_s0, mask_t1);
284}
285
286static struct pipe_buffer *
287setup_vertex_data_yuv(struct xorg_renderer *r,
288                      float srcX, float srcY, float srcW, float srcH,
289                      float dstX, float dstY, float dstW, float dstH,
290                      struct pipe_texture **tex)
291{
292   float s0, t0, s1, t1;
293   float spt0[2], spt1[2];
294
295   spt0[0] = srcX;
296   spt0[1] = srcY;
297   spt1[0] = srcX + srcW;
298   spt1[1] = srcY + srcH;
299
300   s0 = spt0[0] / tex[0]->width0;
301   t0 = spt0[1] / tex[0]->height0;
302   s1 = spt1[0] / tex[0]->width0;
303   t1 = spt1[1] / tex[0]->height0;
304
305   /* 1st vertex */
306   add_vertex_1tex(r, dstX, dstY, s0, t0);
307   /* 2nd vertex */
308   add_vertex_1tex(r, dstX + dstW, dstY,
309                   s1, t0);
310   /* 3rd vertex */
311   add_vertex_1tex(r, dstX + dstW, dstY + dstH,
312                   s1, t1);
313   /* 4th vertex */
314   add_vertex_1tex(r, dstX, dstY + dstH,
315                   s0, t1);
316
317   return renderer_buffer_create(r);
318}
319
320
321
322/* Set up framebuffer, viewport and vertex shader constant buffer
323 * state for a particular destinaton surface.  In all our rendering,
324 * these concepts are linked.
325 */
326void renderer_bind_destination(struct xorg_renderer *r,
327                               struct pipe_surface *surface,
328                               int width,
329                               int height )
330{
331
332   struct pipe_framebuffer_state fb;
333   struct pipe_viewport_state viewport;
334
335   /* Framebuffer uses actual surface width/height
336    */
337   memset(&fb, 0, sizeof fb);
338   fb.width  = surface->width;
339   fb.height = surface->height;
340   fb.nr_cbufs = 1;
341   fb.cbufs[0] = surface;
342   fb.zsbuf = 0;
343
344   /* Viewport just touches the bit we're interested in:
345    */
346   viewport.scale[0] =  width / 2.f;
347   viewport.scale[1] =  height / 2.f;
348   viewport.scale[2] =  1.0;
349   viewport.scale[3] =  1.0;
350   viewport.translate[0] = width / 2.f;
351   viewport.translate[1] = height / 2.f;
352   viewport.translate[2] = 0.0;
353   viewport.translate[3] = 0.0;
354
355   /* Constant buffer set up to match viewport dimensions:
356    */
357   if (r->fb_width != width ||
358       r->fb_height != height)
359   {
360      float vs_consts[8] = {
361         2.f/width, 2.f/height, 1, 1,
362         -1, -1, 0, 0
363      };
364
365      r->fb_width = width;
366      r->fb_height = height;
367
368      renderer_set_constants(r, PIPE_SHADER_VERTEX,
369                             vs_consts, sizeof vs_consts);
370   }
371
372   cso_set_framebuffer(r->cso, &fb);
373   cso_set_viewport(r->cso, &viewport);
374}
375
376
377struct xorg_renderer * renderer_create(struct pipe_context *pipe)
378{
379   struct xorg_renderer *renderer = CALLOC_STRUCT(xorg_renderer);
380
381   renderer->pipe = pipe;
382   renderer->cso = cso_create_context(pipe);
383   renderer->shaders = xorg_shaders_create(renderer);
384
385   renderer_init_state(renderer);
386
387   return renderer;
388}
389
390void renderer_destroy(struct xorg_renderer *r)
391{
392   struct pipe_buffer **vsbuf = &r->vs_const_buffer;
393   struct pipe_buffer **fsbuf = &r->fs_const_buffer;
394
395   if (*vsbuf)
396      pipe_buffer_reference(vsbuf, NULL);
397
398   if (*fsbuf)
399      pipe_buffer_reference(fsbuf, NULL);
400
401   if (r->shaders) {
402      xorg_shaders_destroy(r->shaders);
403      r->shaders = NULL;
404   }
405
406   if (r->cso) {
407      cso_release_all(r->cso);
408      cso_destroy_context(r->cso);
409      r->cso = NULL;
410   }
411}
412
413
414
415
416
417void renderer_set_constants(struct xorg_renderer *r,
418                            int shader_type,
419                            const float *params,
420                            int param_bytes)
421{
422   struct pipe_buffer **cbuf =
423      (shader_type == PIPE_SHADER_VERTEX) ? &r->vs_const_buffer :
424      &r->fs_const_buffer;
425
426   pipe_buffer_reference(cbuf, NULL);
427   *cbuf = pipe_buffer_create(r->pipe->screen, 16,
428                              PIPE_BUFFER_USAGE_CONSTANT,
429                              param_bytes);
430
431   if (*cbuf) {
432      pipe_buffer_write(r->pipe->screen, *cbuf,
433                        0, param_bytes, params);
434   }
435   r->pipe->set_constant_buffer(r->pipe, shader_type, 0, *cbuf);
436}
437
438
439void renderer_copy_prepare(struct xorg_renderer *r,
440                           struct pipe_surface *dst_surface,
441                           struct pipe_texture *src_texture)
442{
443   struct pipe_context *pipe = r->pipe;
444   struct pipe_screen *screen = pipe->screen;
445   struct xorg_shader shader;
446
447   assert(screen->is_format_supported(screen, dst_surface->format,
448                                      PIPE_TEXTURE_2D,
449                                      PIPE_TEXTURE_USAGE_RENDER_TARGET,
450                                      0));
451   (void) screen;
452
453
454   /* set misc state we care about */
455   {
456      struct pipe_blend_state blend;
457      memset(&blend, 0, sizeof(blend));
458      blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
459      blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
460      blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
461      blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
462      blend.rt[0].colormask = PIPE_MASK_RGBA;
463      cso_set_blend(r->cso, &blend);
464   }
465
466   /* sampler */
467   {
468      struct pipe_sampler_state sampler;
469      memset(&sampler, 0, sizeof(sampler));
470      sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
471      sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
472      sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
473      sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
474      sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
475      sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
476      sampler.normalized_coords = 1;
477      cso_single_sampler(r->cso, 0, &sampler);
478      cso_single_sampler_done(r->cso);
479   }
480
481   renderer_bind_destination(r, dst_surface,
482                             dst_surface->width,
483                             dst_surface->height);
484
485   /* texture */
486   cso_set_sampler_textures(r->cso, 1, &src_texture);
487
488   /* shaders */
489   shader = xorg_shaders_get(r->shaders,
490                             VS_COMPOSITE,
491                             FS_COMPOSITE);
492   cso_set_vertex_shader_handle(r->cso, shader.vs);
493   cso_set_fragment_shader_handle(r->cso, shader.fs);
494
495   r->buffer_size = 0;
496   r->attrs_per_vertex = 2;
497}
498
499struct pipe_texture *
500renderer_clone_texture(struct xorg_renderer *r,
501                       struct pipe_texture *src)
502{
503   enum pipe_format format;
504   struct pipe_context *pipe = r->pipe;
505   struct pipe_screen *screen = pipe->screen;
506   struct pipe_texture *pt;
507   struct pipe_texture templ;
508
509   if (pipe->is_texture_referenced(pipe, src, 0, 0) &
510       PIPE_REFERENCED_FOR_WRITE)
511      pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
512
513   /* the coming in texture should already have that invariance */
514   debug_assert(screen->is_format_supported(screen, src->format,
515                                            PIPE_TEXTURE_2D,
516                                            PIPE_TEXTURE_USAGE_SAMPLER, 0));
517
518   format = src->format;
519
520   memset(&templ, 0, sizeof(templ));
521   templ.target = PIPE_TEXTURE_2D;
522   templ.format = format;
523   templ.last_level = 0;
524   templ.width0 = src->width0;
525   templ.height0 = src->height0;
526   templ.depth0 = 1;
527   templ.tex_usage = PIPE_TEXTURE_USAGE_SAMPLER;
528
529   pt = screen->texture_create(screen, &templ);
530
531   debug_assert(!pt || pipe_is_referenced(&pt->reference));
532
533   if (!pt)
534      return NULL;
535
536   {
537      /* copy source framebuffer surface into texture */
538      struct pipe_surface *ps_read = screen->get_tex_surface(
539         screen, src, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_READ);
540      struct pipe_surface *ps_tex = screen->get_tex_surface(
541         screen, pt, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_WRITE );
542      if (pipe->surface_copy) {
543         pipe->surface_copy(pipe,
544                ps_tex, /* dest */
545                0, 0, /* destx/y */
546                ps_read,
547                0, 0, src->width0, src->height0);
548      } else {
549          util_surface_copy(pipe, FALSE,
550                ps_tex, /* dest */
551                0, 0, /* destx/y */
552                ps_read,
553                0, 0, src->width0, src->height0);
554      }
555      pipe_surface_reference(&ps_read, NULL);
556      pipe_surface_reference(&ps_tex, NULL);
557   }
558
559   return pt;
560}
561
562
563void renderer_copy_pixmap(struct xorg_renderer *r,
564                          int dx, int dy,
565                          int sx, int sy,
566                          int width, int height,
567                          float src_width,
568                          float src_height)
569{
570   float s0, t0, s1, t1;
571   float x0, y0, x1, y1;
572
573
574   /* XXX: could put the texcoord scaling calculation into the vertex
575    * shader.
576    */
577   s0 = sx            / src_width;
578   s1 = (sx + width)  / src_width;
579   t0 = sy            / src_height;
580   t1 = (sy + height) / src_height;
581
582   x0 = dx;
583   x1 = dx + width;
584   y0 = dy;
585   y1 = dy + height;
586
587   /* draw quad */
588   renderer_draw_conditional(r, 4*8);
589   add_vertex_1tex(r, x0, y0, s0, t0);
590   add_vertex_1tex(r, x1, y0, s1, t0);
591   add_vertex_1tex(r, x1, y1, s1, t1);
592   add_vertex_1tex(r, x0, y1, s0, t1);
593}
594
595
596
597
598void renderer_draw_yuv(struct xorg_renderer *r,
599                       int src_x, int src_y, int src_w, int src_h,
600                       int dst_x, int dst_y, int dst_w, int dst_h,
601                       struct pipe_texture **textures)
602{
603   struct pipe_context *pipe = r->pipe;
604   struct pipe_buffer *buf = 0;
605
606   buf = setup_vertex_data_yuv(r,
607                               src_x, src_y, src_w, src_h,
608                               dst_x, dst_y, dst_w, dst_h,
609                               textures);
610
611   if (buf) {
612      const int num_attribs = 2; /*pos + tex coord*/
613
614      cso_set_vertex_elements(r->cso, num_attribs, r->velems);
615
616      util_draw_vertex_buffer(pipe, buf, 0,
617                              PIPE_PRIM_QUADS,
618                              4,  /* verts */
619                              num_attribs); /* attribs/vert */
620
621      pipe_buffer_reference(&buf, NULL);
622   }
623}
624
625void renderer_begin_solid(struct xorg_renderer *r)
626{
627   r->buffer_size = 0;
628   r->attrs_per_vertex = 2;
629}
630
631void renderer_solid(struct xorg_renderer *r,
632                    int x0, int y0,
633                    int x1, int y1,
634                    float *color)
635{
636   /*
637   debug_printf("solid rect[(%d, %d), (%d, %d)], rgba[%f, %f, %f, %f]\n",
638   x0, y0, x1, y1, color[0], color[1], color[2], color[3]);*/
639
640   renderer_draw_conditional(r, 4 * 8);
641
642   /* 1st vertex */
643   add_vertex_color(r, x0, y0, color);
644   /* 2nd vertex */
645   add_vertex_color(r, x1, y0, color);
646   /* 3rd vertex */
647   add_vertex_color(r, x1, y1, color);
648   /* 4th vertex */
649   add_vertex_color(r, x0, y1, color);
650}
651
652void renderer_draw_flush(struct xorg_renderer *r)
653{
654   renderer_draw_conditional(r, 0);
655}
656
657void renderer_begin_textures(struct xorg_renderer *r,
658                             struct pipe_texture **textures,
659                             int num_textures)
660{
661   r->attrs_per_vertex = 1 + num_textures;
662   r->buffer_size = 0;
663}
664
665void renderer_texture(struct xorg_renderer *r,
666                      int *pos,
667                      int width, int height,
668                      struct pipe_texture **textures,
669                      int num_textures,
670                      float *src_matrix,
671                      float *mask_matrix)
672{
673
674#if 0
675   if (src_matrix) {
676      debug_printf("src_matrix = \n");
677      debug_printf("%f, %f, %f\n", src_matrix[0], src_matrix[1], src_matrix[2]);
678      debug_printf("%f, %f, %f\n", src_matrix[3], src_matrix[4], src_matrix[5]);
679      debug_printf("%f, %f, %f\n", src_matrix[6], src_matrix[7], src_matrix[8]);
680   }
681   if (mask_matrix) {
682      debug_printf("mask_matrix = \n");
683      debug_printf("%f, %f, %f\n", mask_matrix[0], mask_matrix[1], mask_matrix[2]);
684      debug_printf("%f, %f, %f\n", mask_matrix[3], mask_matrix[4], mask_matrix[5]);
685      debug_printf("%f, %f, %f\n", mask_matrix[6], mask_matrix[7], mask_matrix[8]);
686   }
687#endif
688
689   switch(r->attrs_per_vertex) {
690   case 2:
691      renderer_draw_conditional(r, 4 * 8);
692      add_vertex_data1(r,
693                       pos[0], pos[1], /* src */
694                       pos[4], pos[5], /* dst */
695                       width, height,
696                       textures[0], src_matrix);
697      break;
698   case 3:
699      renderer_draw_conditional(r, 4 * 12);
700      add_vertex_data2(r,
701                       pos[0], pos[1], /* src */
702                       pos[2], pos[3], /* mask */
703                       pos[4], pos[5], /* dst */
704                       width, height,
705                       textures[0], textures[1],
706                       src_matrix, mask_matrix);
707      break;
708   default:
709      debug_assert(!"Unsupported number of textures");
710      break;
711   }
712}
713