u_blit.c revision d4ec85e62423336d3cddc45f26bef6764f435a18 
1/**************************************************************************
2 *
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * 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
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28/**
29 * @file
30 * Copy/blit pixel rect between surfaces
31 *
32 * @author Brian Paul
33 */
34
35
36#include "pipe/p_context.h"
37#include "util/u_debug.h"
38#include "pipe/p_defines.h"
39#include "util/u_inlines.h"
40#include "pipe/p_shader_tokens.h"
41#include "pipe/p_state.h"
42
43#include "util/u_blit.h"
44#include "util/u_draw_quad.h"
45#include "util/u_math.h"
46#include "util/u_memory.h"
47#include "util/u_sampler.h"
48#include "util/u_simple_shaders.h"
49
50#include "cso_cache/cso_context.h"
51
52
53struct blit_state
54{
55   struct pipe_context *pipe;
56   struct cso_context *cso;
57
58   struct pipe_blend_state blend;
59   struct pipe_depth_stencil_alpha_state depthstencil;
60   struct pipe_rasterizer_state rasterizer;
61   struct pipe_sampler_state sampler;
62   struct pipe_viewport_state viewport;
63   struct pipe_clip_state clip;
64   struct pipe_vertex_element velem[2];
65   enum pipe_texture_target internal_target;
66
67   void *vs;
68   void *fs[TGSI_WRITEMASK_XYZW + 1];
69
70   struct pipe_resource *vbuf;  /**< quad vertices */
71   unsigned vbuf_slot;
72
73   float vertices[4][2][4];   /**< vertex/texcoords for quad */
74};
75
76
77/**
78 * Create state object for blit.
79 * Intended to be created once and re-used for many blit() calls.
80 */
81struct blit_state *
82util_create_blit(struct pipe_context *pipe, struct cso_context *cso)
83{
84   struct blit_state *ctx;
85   uint i;
86
87   ctx = CALLOC_STRUCT(blit_state);
88   if (!ctx)
89      return NULL;
90
91   ctx->pipe = pipe;
92   ctx->cso = cso;
93
94   /* disabled blending/masking */
95   memset(&ctx->blend, 0, sizeof(ctx->blend));
96   ctx->blend.rt[0].colormask = PIPE_MASK_RGBA;
97
98   /* no-op depth/stencil/alpha */
99   memset(&ctx->depthstencil, 0, sizeof(ctx->depthstencil));
100
101   /* rasterizer */
102   memset(&ctx->rasterizer, 0, sizeof(ctx->rasterizer));
103   ctx->rasterizer.cull_face = PIPE_FACE_NONE;
104   ctx->rasterizer.gl_rasterization_rules = 1;
105
106   /* samplers */
107   memset(&ctx->sampler, 0, sizeof(ctx->sampler));
108   ctx->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
109   ctx->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
110   ctx->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
111   ctx->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
112   ctx->sampler.min_img_filter = 0; /* set later */
113   ctx->sampler.mag_img_filter = 0; /* set later */
114
115   /* vertex elements state */
116   memset(&ctx->velem[0], 0, sizeof(ctx->velem[0]) * 2);
117   for (i = 0; i < 2; i++) {
118      ctx->velem[i].src_offset = i * 4 * sizeof(float);
119      ctx->velem[i].instance_divisor = 0;
120      ctx->velem[i].vertex_buffer_index = 0;
121      ctx->velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
122   }
123
124   /* vertex shader - still required to provide the linkage between
125    * fragment shader input semantics and vertex_element/buffers.
126    */
127   {
128      const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
129                                      TGSI_SEMANTIC_GENERIC };
130      const uint semantic_indexes[] = { 0, 0 };
131      ctx->vs = util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
132                                                    semantic_indexes);
133   }
134
135   /* fragment shader */
136   ctx->fs[TGSI_WRITEMASK_XYZW] =
137      util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D,
138                                    TGSI_INTERPOLATE_LINEAR);
139   ctx->vbuf = NULL;
140
141   /* init vertex data that doesn't change */
142   for (i = 0; i < 4; i++) {
143      ctx->vertices[i][0][3] = 1.0f; /* w */
144      ctx->vertices[i][1][2] = 0.0f; /* r */
145      ctx->vertices[i][1][3] = 1.0f; /* q */
146   }
147
148   if(pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
149      ctx->internal_target = PIPE_TEXTURE_2D;
150   else
151      ctx->internal_target = PIPE_TEXTURE_RECT;
152
153   return ctx;
154}
155
156
157/**
158 * Destroy a blit context
159 */
160void
161util_destroy_blit(struct blit_state *ctx)
162{
163   struct pipe_context *pipe = ctx->pipe;
164   unsigned i;
165
166   pipe->delete_vs_state(pipe, ctx->vs);
167
168   for (i = 0; i < Elements(ctx->fs); i++)
169      if (ctx->fs[i])
170         pipe->delete_fs_state(pipe, ctx->fs[i]);
171
172   pipe_resource_reference(&ctx->vbuf, NULL);
173
174   FREE(ctx);
175}
176
177
178/**
179 * Get offset of next free slot in vertex buffer for quad vertices.
180 */
181static unsigned
182get_next_slot( struct blit_state *ctx )
183{
184   const unsigned max_slots = 4096 / sizeof ctx->vertices;
185
186   if (ctx->vbuf_slot >= max_slots)
187      util_blit_flush( ctx );
188
189   if (!ctx->vbuf) {
190      ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
191                                     PIPE_BIND_VERTEX_BUFFER,
192                                     max_slots * sizeof ctx->vertices);
193   }
194
195   return ctx->vbuf_slot++ * sizeof ctx->vertices;
196}
197
198
199
200
201/**
202 * Setup vertex data for the textured quad we'll draw.
203 * Note: y=0=top
204 */
205static unsigned
206setup_vertex_data_tex(struct blit_state *ctx,
207                      float x0, float y0, float x1, float y1,
208                      float s0, float t0, float s1, float t1,
209                      float z)
210{
211   unsigned offset;
212
213   ctx->vertices[0][0][0] = x0;
214   ctx->vertices[0][0][1] = y0;
215   ctx->vertices[0][0][2] = z;
216   ctx->vertices[0][1][0] = s0; /*s*/
217   ctx->vertices[0][1][1] = t0; /*t*/
218
219   ctx->vertices[1][0][0] = x1;
220   ctx->vertices[1][0][1] = y0;
221   ctx->vertices[1][0][2] = z;
222   ctx->vertices[1][1][0] = s1; /*s*/
223   ctx->vertices[1][1][1] = t0; /*t*/
224
225   ctx->vertices[2][0][0] = x1;
226   ctx->vertices[2][0][1] = y1;
227   ctx->vertices[2][0][2] = z;
228   ctx->vertices[2][1][0] = s1;
229   ctx->vertices[2][1][1] = t1;
230
231   ctx->vertices[3][0][0] = x0;
232   ctx->vertices[3][0][1] = y1;
233   ctx->vertices[3][0][2] = z;
234   ctx->vertices[3][1][0] = s0;
235   ctx->vertices[3][1][1] = t1;
236
237   offset = get_next_slot( ctx );
238
239   pipe_buffer_write_nooverlap(ctx->pipe, ctx->vbuf,
240                               offset, sizeof(ctx->vertices), ctx->vertices);
241
242   return offset;
243}
244
245
246/**
247 * \return TRUE if two regions overlap, FALSE otherwise
248 */
249static boolean
250regions_overlap(int srcX0, int srcY0,
251                int srcX1, int srcY1,
252                int dstX0, int dstY0,
253                int dstX1, int dstY1)
254{
255   if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1))
256      return FALSE; /* src completely left of dst */
257
258   if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))
259      return FALSE; /* dst completely left of src */
260
261   if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))
262      return FALSE; /* src completely above dst */
263
264   if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))
265      return FALSE; /* dst completely above src */
266
267   return TRUE; /* some overlap */
268}
269
270
271/**
272 * Copy pixel block from src surface to dst surface.
273 * Overlapping regions are acceptable.
274 * Flipping and stretching are supported.
275 * \param filter  one of PIPE_TEX_MIPFILTER_NEAREST/LINEAR
276 * \param writemask  controls which channels in the dest surface are sourced
277 *                   from the src surface.  Disabled channels are sourced
278 *                   from (0,0,0,1).
279 * XXX need some control over blitting Z and/or stencil.
280 */
281void
282util_blit_pixels_writemask(struct blit_state *ctx,
283                           struct pipe_resource *src_tex,
284                           struct pipe_subresource srcsub,
285                           int srcX0, int srcY0,
286                           int srcX1, int srcY1,
287                           int srcZ0,
288                           struct pipe_surface *dst,
289                           int dstX0, int dstY0,
290                           int dstX1, int dstY1,
291                           float z, uint filter,
292                           uint writemask)
293{
294   struct pipe_context *pipe = ctx->pipe;
295   struct pipe_screen *screen = pipe->screen;
296   struct pipe_sampler_view *sampler_view = NULL;
297   struct pipe_sampler_view sv_templ;
298   struct pipe_framebuffer_state fb;
299   const int srcW = abs(srcX1 - srcX0);
300   const int srcH = abs(srcY1 - srcY0);
301   unsigned offset;
302   boolean overlap;
303   float s0, t0, s1, t1;
304   boolean normalized;
305
306   assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
307          filter == PIPE_TEX_MIPFILTER_LINEAR);
308
309   assert(srcsub.level <= src_tex->last_level);
310
311   /* do the regions overlap? */
312   overlap = src_tex == dst->texture &&
313             dst->face == srcsub.face &&
314             dst->level == srcsub.level &&
315             dst->zslice == srcZ0 &&
316      regions_overlap(srcX0, srcY0, srcX1, srcY1,
317                      dstX0, dstY0, dstX1, dstY1);
318
319   /*
320    * Check for simple case:  no format conversion, no flipping, no stretching,
321    * no overlapping.
322    * Filter mode should not matter since there's no stretching.
323    */
324   if (dst->format == src_tex->format &&
325       srcX0 < srcX1 &&
326       dstX0 < dstX1 &&
327       srcY0 < srcY1 &&
328       dstY0 < dstY1 &&
329       (dstX1 - dstX0) == (srcX1 - srcX0) &&
330       (dstY1 - dstY0) == (srcY1 - srcY0) &&
331       !overlap) {
332      struct pipe_subresource subdst;
333      subdst.face = dst->face;
334      subdst.level = dst->level;
335      pipe->resource_copy_region(pipe,
336                                 dst->texture, subdst,
337                                 dstX0, dstY0, dst->zslice,/* dest */
338                                 src_tex, srcsub,
339                                 srcX0, srcY0, srcZ0,/* src */
340                                 srcW, srcH);       /* size */
341      return;
342   }
343
344   /* Create a temporary texture when src and dest alias or when src
345    * is anything other than a 2d texture.
346    * XXX should just use appropriate shader to access 1d / 3d slice / cube face,
347    * much like the u_blitter code does (should be pretty trivial).
348    *
349    * This can still be improved upon.
350    */
351   if ((src_tex == dst->texture &&
352       dst->face == srcsub.face &&
353       dst->level == srcsub.level &&
354       dst->zslice == srcZ0) ||
355       (src_tex->target != PIPE_TEXTURE_2D &&
356       src_tex->target != PIPE_TEXTURE_RECT))
357   {
358      struct pipe_resource texTemp;
359      struct pipe_resource *tex;
360      struct pipe_sampler_view sv_templ;
361      struct pipe_subresource texsub;
362      const int srcLeft = MIN2(srcX0, srcX1);
363      const int srcTop = MIN2(srcY0, srcY1);
364
365      if (srcLeft != srcX0) {
366         /* left-right flip */
367         int tmp = dstX0;
368         dstX0 = dstX1;
369         dstX1 = tmp;
370      }
371
372      if (srcTop != srcY0) {
373         /* up-down flip */
374         int tmp = dstY0;
375         dstY0 = dstY1;
376         dstY1 = tmp;
377      }
378
379      /* create temp texture */
380      memset(&texTemp, 0, sizeof(texTemp));
381      texTemp.target = ctx->internal_target;
382      texTemp.format = src_tex->format;
383      texTemp.last_level = 0;
384      texTemp.width0 = srcW;
385      texTemp.height0 = srcH;
386      texTemp.depth0 = 1;
387      texTemp.bind = PIPE_BIND_SAMPLER_VIEW;
388
389      tex = screen->resource_create(screen, &texTemp);
390      if (!tex)
391         return;
392
393      texsub.face = 0;
394      texsub.level = 0;
395      /* load temp texture */
396      pipe->resource_copy_region(pipe,
397                                 tex, texsub, 0, 0, 0,  /* dest */
398                                 src_tex, srcsub, srcLeft, srcTop, srcZ0, /* src */
399                                 srcW, srcH);     /* size */
400
401      normalized = tex->target != PIPE_TEXTURE_RECT;
402      if(normalized) {
403         s0 = 0.0f;
404         s1 = 1.0f;
405         t0 = 0.0f;
406         t1 = 1.0f;
407      }
408      else {
409         s0 = 0;
410         s1 = srcW;
411         t0 = 0;
412         t1 = srcH;
413      }
414
415      u_sampler_view_default_template(&sv_templ, tex, tex->format);
416      sampler_view = pipe->create_sampler_view(pipe, tex, &sv_templ);
417
418      if (!sampler_view) {
419         pipe_resource_reference(&tex, NULL);
420         return;
421      }
422      pipe_resource_reference(&tex, NULL);
423   }
424   else {
425      u_sampler_view_default_template(&sv_templ, src_tex, src_tex->format);
426      sv_templ.first_level = sv_templ.last_level = srcsub.level;
427      sampler_view = pipe->create_sampler_view(pipe, src_tex, &sv_templ);
428
429      if (!sampler_view) {
430         return;
431      }
432
433      s0 = srcX0;
434      s1 = srcX1;
435      t0 = srcY0;
436      t1 = srcY1;
437      normalized = sampler_view->texture->target != PIPE_TEXTURE_RECT;
438      if(normalized)
439      {
440         s0 /= (float)(u_minify(sampler_view->texture->width0, srcsub.level));
441         s1 /= (float)(u_minify(sampler_view->texture->width0, srcsub.level));
442         t0 /= (float)(u_minify(sampler_view->texture->height0, srcsub.level));
443         t1 /= (float)(u_minify(sampler_view->texture->height0, srcsub.level));
444      }
445   }
446
447
448   assert(screen->is_format_supported(screen, sampler_view->format, ctx->internal_target,
449                                      sampler_view->texture->nr_samples,
450                                      PIPE_BIND_SAMPLER_VIEW, 0));
451   assert(screen->is_format_supported(screen, dst->format, ctx->internal_target,
452                                      dst->texture->nr_samples,
453                                      PIPE_BIND_RENDER_TARGET, 0));
454
455   /* save state (restored below) */
456   cso_save_blend(ctx->cso);
457   cso_save_depth_stencil_alpha(ctx->cso);
458   cso_save_rasterizer(ctx->cso);
459   cso_save_samplers(ctx->cso);
460   cso_save_fragment_sampler_views(ctx->cso);
461   cso_save_viewport(ctx->cso);
462   cso_save_framebuffer(ctx->cso);
463   cso_save_fragment_shader(ctx->cso);
464   cso_save_vertex_shader(ctx->cso);
465   cso_save_clip(ctx->cso);
466   cso_save_vertex_elements(ctx->cso);
467
468   /* set misc state we care about */
469   cso_set_blend(ctx->cso, &ctx->blend);
470   cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil);
471   cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
472   cso_set_clip(ctx->cso, &ctx->clip);
473   cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
474
475   /* sampler */
476   ctx->sampler.normalized_coords = normalized;
477   ctx->sampler.min_img_filter = filter;
478   ctx->sampler.mag_img_filter = filter;
479   /* we've limited this already with the sampler view but you never know... */
480   ctx->sampler.min_lod = srcsub.level;
481   ctx->sampler.max_lod = srcsub.level;
482   cso_single_sampler(ctx->cso, 0, &ctx->sampler);
483   cso_single_sampler_done(ctx->cso);
484
485   /* viewport */
486   ctx->viewport.scale[0] = 0.5f * dst->width;
487   ctx->viewport.scale[1] = 0.5f * dst->height;
488   ctx->viewport.scale[2] = 0.5f;
489   ctx->viewport.scale[3] = 1.0f;
490   ctx->viewport.translate[0] = 0.5f * dst->width;
491   ctx->viewport.translate[1] = 0.5f * dst->height;
492   ctx->viewport.translate[2] = 0.5f;
493   ctx->viewport.translate[3] = 0.0f;
494   cso_set_viewport(ctx->cso, &ctx->viewport);
495
496   /* texture */
497   cso_set_fragment_sampler_views(ctx->cso, 1, &sampler_view);
498
499   if (ctx->fs[writemask] == NULL)
500      ctx->fs[writemask] =
501         util_make_fragment_tex_shader_writemask(pipe, TGSI_TEXTURE_2D,
502                                                 TGSI_INTERPOLATE_LINEAR,
503                                                 writemask);
504
505   /* shaders */
506   cso_set_fragment_shader_handle(ctx->cso, ctx->fs[writemask]);
507   cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
508
509   /* drawing dest */
510   memset(&fb, 0, sizeof(fb));
511   fb.width = dst->width;
512   fb.height = dst->height;
513   fb.nr_cbufs = 1;
514   fb.cbufs[0] = dst;
515   cso_set_framebuffer(ctx->cso, &fb);
516
517   /* draw quad */
518   offset = setup_vertex_data_tex(ctx,
519                                  (float) dstX0 / dst->width * 2.0f - 1.0f,
520                                  (float) dstY0 / dst->height * 2.0f - 1.0f,
521                                  (float) dstX1 / dst->width * 2.0f - 1.0f,
522                                  (float) dstY1 / dst->height * 2.0f - 1.0f,
523                                  s0, t0,
524                                  s1, t1,
525                                  z);
526
527   util_draw_vertex_buffer(ctx->pipe, ctx->vbuf, offset,
528                           PIPE_PRIM_TRIANGLE_FAN,
529                           4,  /* verts */
530                           2); /* attribs/vert */
531
532   /* restore state we changed */
533   cso_restore_blend(ctx->cso);
534   cso_restore_depth_stencil_alpha(ctx->cso);
535   cso_restore_rasterizer(ctx->cso);
536   cso_restore_samplers(ctx->cso);
537   cso_restore_fragment_sampler_views(ctx->cso);
538   cso_restore_viewport(ctx->cso);
539   cso_restore_framebuffer(ctx->cso);
540   cso_restore_fragment_shader(ctx->cso);
541   cso_restore_vertex_shader(ctx->cso);
542   cso_restore_clip(ctx->cso);
543   cso_restore_vertex_elements(ctx->cso);
544
545   pipe_sampler_view_reference(&sampler_view, NULL);
546}
547
548
549void
550util_blit_pixels(struct blit_state *ctx,
551                 struct pipe_resource *src_tex,
552                 struct pipe_subresource srcsub,
553                 int srcX0, int srcY0,
554                 int srcX1, int srcY1,
555                 int srcZ,
556                 struct pipe_surface *dst,
557                 int dstX0, int dstY0,
558                 int dstX1, int dstY1,
559                 float z, uint filter )
560{
561   util_blit_pixels_writemask( ctx, src_tex,
562                               srcsub,
563                               srcX0, srcY0,
564                               srcX1, srcY1,
565                               srcZ,
566                               dst,
567                               dstX0, dstY0,
568                               dstX1, dstY1,
569                               z, filter,
570                               TGSI_WRITEMASK_XYZW );
571}
572
573
574/* Release vertex buffer at end of frame to avoid synchronous
575 * rendering.
576 */
577void util_blit_flush( struct blit_state *ctx )
578{
579   pipe_resource_reference(&ctx->vbuf, NULL);
580   ctx->vbuf_slot = 0;
581}
582
583
584
585/**
586 * Copy pixel block from src texture to dst surface.
587 *
588 * XXX Should support selection of level.
589 * XXX need some control over blitting Z and/or stencil.
590 */
591void
592util_blit_pixels_tex(struct blit_state *ctx,
593                     struct pipe_sampler_view *src_sampler_view,
594                     int srcX0, int srcY0,
595                     int srcX1, int srcY1,
596                     struct pipe_surface *dst,
597                     int dstX0, int dstY0,
598                     int dstX1, int dstY1,
599                     float z, uint filter)
600{
601   boolean normalized = src_sampler_view->texture->target != PIPE_TEXTURE_RECT;
602   struct pipe_framebuffer_state fb;
603   float s0, t0, s1, t1;
604   unsigned offset;
605   struct pipe_resource *tex = src_sampler_view->texture;
606
607   assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
608          filter == PIPE_TEX_MIPFILTER_LINEAR);
609
610   assert(tex);
611   assert(tex->width0 != 0);
612   assert(tex->height0 != 0);
613
614   s0 = srcX0;
615   s1 = srcX1;
616   t0 = srcY0;
617   t1 = srcY1;
618
619   if(normalized)
620   {
621      s0 /= (float)tex->width0;
622      s1 /= (float)tex->width0;
623      t0 /= (float)tex->height0;
624      t1 /= (float)tex->height0;
625   }
626
627   assert(ctx->pipe->screen->is_format_supported(ctx->pipe->screen, dst->format,
628                                                 PIPE_TEXTURE_2D,
629                                                 dst->texture->nr_samples,
630                                                 PIPE_BIND_RENDER_TARGET,
631                                                 0));
632
633   /* save state (restored below) */
634   cso_save_blend(ctx->cso);
635   cso_save_depth_stencil_alpha(ctx->cso);
636   cso_save_rasterizer(ctx->cso);
637   cso_save_samplers(ctx->cso);
638   cso_save_fragment_sampler_views(ctx->cso);
639   cso_save_framebuffer(ctx->cso);
640   cso_save_fragment_shader(ctx->cso);
641   cso_save_vertex_shader(ctx->cso);
642   cso_save_clip(ctx->cso);
643   cso_save_vertex_elements(ctx->cso);
644
645   /* set misc state we care about */
646   cso_set_blend(ctx->cso, &ctx->blend);
647   cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil);
648   cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
649   cso_set_clip(ctx->cso, &ctx->clip);
650   cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
651
652   /* sampler */
653   ctx->sampler.normalized_coords = normalized;
654   ctx->sampler.min_img_filter = filter;
655   ctx->sampler.mag_img_filter = filter;
656   cso_single_sampler(ctx->cso, 0, &ctx->sampler);
657   cso_single_sampler_done(ctx->cso);
658
659   /* viewport */
660   ctx->viewport.scale[0] = 0.5f * dst->width;
661   ctx->viewport.scale[1] = 0.5f * dst->height;
662   ctx->viewport.scale[2] = 0.5f;
663   ctx->viewport.scale[3] = 1.0f;
664   ctx->viewport.translate[0] = 0.5f * dst->width;
665   ctx->viewport.translate[1] = 0.5f * dst->height;
666   ctx->viewport.translate[2] = 0.5f;
667   ctx->viewport.translate[3] = 0.0f;
668   cso_set_viewport(ctx->cso, &ctx->viewport);
669
670   /* texture */
671   cso_set_fragment_sampler_views(ctx->cso, 1, &src_sampler_view);
672
673   /* shaders */
674   cso_set_fragment_shader_handle(ctx->cso, ctx->fs[TGSI_WRITEMASK_XYZW]);
675   cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
676
677   /* drawing dest */
678   memset(&fb, 0, sizeof(fb));
679   fb.width = dst->width;
680   fb.height = dst->height;
681   fb.nr_cbufs = 1;
682   fb.cbufs[0] = dst;
683   cso_set_framebuffer(ctx->cso, &fb);
684
685   /* draw quad */
686   offset = setup_vertex_data_tex(ctx,
687                                  (float) dstX0 / dst->width * 2.0f - 1.0f,
688                                  (float) dstY0 / dst->height * 2.0f - 1.0f,
689                                  (float) dstX1 / dst->width * 2.0f - 1.0f,
690                                  (float) dstY1 / dst->height * 2.0f - 1.0f,
691                                  s0, t0, s1, t1,
692                                  z);
693
694   util_draw_vertex_buffer(ctx->pipe,
695                           ctx->vbuf, offset,
696                           PIPE_PRIM_TRIANGLE_FAN,
697                           4,  /* verts */
698                           2); /* attribs/vert */
699
700   /* restore state we changed */
701   cso_restore_blend(ctx->cso);
702   cso_restore_depth_stencil_alpha(ctx->cso);
703   cso_restore_rasterizer(ctx->cso);
704   cso_restore_samplers(ctx->cso);
705   cso_restore_fragment_sampler_views(ctx->cso);
706   cso_restore_framebuffer(ctx->cso);
707   cso_restore_fragment_shader(ctx->cso);
708   cso_restore_vertex_shader(ctx->cso);
709   cso_restore_clip(ctx->cso);
710   cso_restore_vertex_elements(ctx->cso);
711}
712