1/**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.  All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
20 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 **************************************************************************/
26
27#include "vg_context.h"
28
29#include "paint.h"
30#include "renderer.h"
31#include "shaders_cache.h"
32#include "shader.h"
33#include "vg_manager.h"
34#include "api.h"
35#include "mask.h"
36#include "handle.h"
37
38#include "pipe/p_context.h"
39#include "util/u_inlines.h"
40
41#include "cso_cache/cso_context.h"
42
43#include "util/u_memory.h"
44#include "util/u_blit.h"
45#include "util/u_sampler.h"
46#include "util/u_surface.h"
47#include "util/u_format.h"
48
49struct vg_context *_vg_context = 0;
50
51struct vg_context * vg_current_context(void)
52{
53   return _vg_context;
54}
55
56/**
57 * A depth/stencil rb will be needed regardless of what the visual says.
58 */
59static boolean
60choose_depth_stencil_format(struct vg_context *ctx)
61{
62   struct pipe_screen *screen = ctx->pipe->screen;
63   enum pipe_format formats[] = {
64      PIPE_FORMAT_Z24_UNORM_S8_UINT,
65      PIPE_FORMAT_S8_UINT_Z24_UNORM,
66      PIPE_FORMAT_NONE
67   };
68   enum pipe_format *fmt;
69
70   for (fmt = formats; *fmt != PIPE_FORMAT_NONE; fmt++) {
71      if (screen->is_format_supported(screen, *fmt,
72               PIPE_TEXTURE_2D, 0, PIPE_BIND_DEPTH_STENCIL))
73         break;
74   }
75
76   ctx->ds_format = *fmt;
77
78   return (ctx->ds_format != PIPE_FORMAT_NONE);
79}
80
81void vg_set_current_context(struct vg_context *ctx)
82{
83   _vg_context = ctx;
84   api_make_dispatch_current((ctx) ? ctx->dispatch : NULL);
85}
86
87struct vg_context * vg_create_context(struct pipe_context *pipe,
88                                      const void *visual,
89                                      struct vg_context *share)
90{
91   struct vg_context *ctx;
92
93   ctx = CALLOC_STRUCT(vg_context);
94
95   ctx->pipe = pipe;
96   if (!choose_depth_stencil_format(ctx)) {
97      FREE(ctx);
98      return NULL;
99   }
100
101   ctx->dispatch = api_create_dispatch();
102
103   vg_init_state(&ctx->state.vg);
104   ctx->state.dirty = ALL_DIRTY;
105
106   ctx->cso_context = cso_create_context(pipe);
107
108   ctx->default_paint = paint_create(ctx);
109   ctx->state.vg.stroke_paint = ctx->default_paint;
110   ctx->state.vg.fill_paint = ctx->default_paint;
111
112
113   ctx->mask.sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
114   ctx->mask.sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
115   ctx->mask.sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
116   ctx->mask.sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
117   ctx->mask.sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
118   ctx->mask.sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
119   ctx->mask.sampler.normalized_coords = 0;
120
121   ctx->blend_sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
122   ctx->blend_sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
123   ctx->blend_sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
124   ctx->blend_sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
125   ctx->blend_sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
126   ctx->blend_sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
127   ctx->blend_sampler.normalized_coords = 0;
128
129   vg_set_error(ctx, VG_NO_ERROR);
130
131   ctx->owned_objects[VG_OBJECT_PAINT] = cso_hash_create();
132   ctx->owned_objects[VG_OBJECT_IMAGE] = cso_hash_create();
133   ctx->owned_objects[VG_OBJECT_MASK] = cso_hash_create();
134   ctx->owned_objects[VG_OBJECT_FONT] = cso_hash_create();
135   ctx->owned_objects[VG_OBJECT_PATH] = cso_hash_create();
136
137   ctx->renderer = renderer_create(ctx);
138   ctx->sc = shaders_cache_create(ctx);
139   ctx->shader = shader_create(ctx);
140
141   ctx->blit = util_create_blit(ctx->pipe, ctx->cso_context);
142
143   return ctx;
144}
145
146void vg_destroy_context(struct vg_context *ctx)
147{
148   struct pipe_resource **cbuf = &ctx->mask.cbuf;
149
150   util_destroy_blit(ctx->blit);
151   renderer_destroy(ctx->renderer);
152   shaders_cache_destroy(ctx->sc);
153   shader_destroy(ctx->shader);
154   paint_destroy(ctx->default_paint);
155
156   if (*cbuf)
157      pipe_resource_reference(cbuf, NULL);
158
159   if (ctx->mask.union_fs)
160      vg_shader_destroy(ctx, ctx->mask.union_fs);
161   if (ctx->mask.intersect_fs)
162      vg_shader_destroy(ctx, ctx->mask.intersect_fs);
163   if (ctx->mask.subtract_fs)
164      vg_shader_destroy(ctx, ctx->mask.subtract_fs);
165   if (ctx->mask.set_fs)
166      vg_shader_destroy(ctx, ctx->mask.set_fs);
167
168   cso_release_all(ctx->cso_context);
169   cso_destroy_context(ctx->cso_context);
170
171   cso_hash_delete(ctx->owned_objects[VG_OBJECT_PAINT]);
172   cso_hash_delete(ctx->owned_objects[VG_OBJECT_IMAGE]);
173   cso_hash_delete(ctx->owned_objects[VG_OBJECT_MASK]);
174   cso_hash_delete(ctx->owned_objects[VG_OBJECT_FONT]);
175   cso_hash_delete(ctx->owned_objects[VG_OBJECT_PATH]);
176
177   api_destroy_dispatch(ctx->dispatch);
178
179   FREE(ctx);
180}
181
182void vg_init_object(struct vg_object *obj, struct vg_context *ctx, enum vg_object_type type)
183{
184   obj->type = type;
185   obj->ctx = ctx;
186   obj->handle = create_handle(obj);
187}
188
189/** free object resources, but not the object itself */
190void vg_free_object(struct vg_object *obj)
191{
192   obj->type = 0;
193   obj->ctx = NULL;
194   destroy_handle(obj->handle);
195}
196
197VGboolean vg_context_is_object_valid(struct vg_context *ctx,
198                                enum vg_object_type type,
199                                VGHandle handle)
200{
201    if (ctx) {
202       struct cso_hash *hash = ctx->owned_objects[type];
203       if (!hash)
204          return VG_FALSE;
205       return cso_hash_contains(hash, (unsigned) handle);
206    }
207    return VG_FALSE;
208}
209
210void vg_context_add_object(struct vg_context *ctx,
211                           struct vg_object *obj)
212{
213    if (ctx) {
214       struct cso_hash *hash = ctx->owned_objects[obj->type];
215       if (!hash)
216          return;
217       cso_hash_insert(hash, (unsigned) obj->handle, obj);
218    }
219}
220
221void vg_context_remove_object(struct vg_context *ctx,
222                              struct vg_object *obj)
223{
224   if (ctx) {
225      struct cso_hash *hash = ctx->owned_objects[obj->type];
226      if (!hash)
227         return;
228      cso_hash_take(hash, (unsigned) obj->handle);
229   }
230}
231
232static struct pipe_resource *
233create_texture(struct pipe_context *pipe, enum pipe_format format,
234                    VGint width, VGint height)
235{
236   struct pipe_resource templ;
237
238   memset(&templ, 0, sizeof(templ));
239
240   if (format != PIPE_FORMAT_NONE) {
241      templ.format = format;
242   }
243   else {
244      templ.format = PIPE_FORMAT_B8G8R8A8_UNORM;
245   }
246
247   templ.target = PIPE_TEXTURE_2D;
248   templ.width0 = width;
249   templ.height0 = height;
250   templ.depth0 = 1;
251   templ.array_size = 1;
252   templ.last_level = 0;
253
254   if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1)) {
255      templ.bind = PIPE_BIND_DEPTH_STENCIL;
256   } else {
257      templ.bind = (PIPE_BIND_DISPLAY_TARGET |
258                    PIPE_BIND_RENDER_TARGET |
259                    PIPE_BIND_SAMPLER_VIEW);
260   }
261
262   return pipe->screen->resource_create(pipe->screen, &templ);
263}
264
265static struct pipe_sampler_view *
266create_tex_and_view(struct pipe_context *pipe, enum pipe_format format,
267                    VGint width, VGint height)
268{
269   struct pipe_resource *texture;
270   struct pipe_sampler_view view_templ;
271   struct pipe_sampler_view *view;
272
273   texture = create_texture(pipe, format, width, height);
274
275   if (!texture)
276      return NULL;
277
278   u_sampler_view_default_template(&view_templ, texture, texture->format);
279   view = pipe->create_sampler_view(pipe, texture, &view_templ);
280   /* want the texture to go away if the view is freed */
281   pipe_resource_reference(&texture, NULL);
282
283   return view;
284}
285
286static void
287vg_context_update_surface_mask_view(struct vg_context *ctx,
288                                    uint width, uint height)
289{
290   struct st_framebuffer *stfb = ctx->draw_buffer;
291   struct pipe_sampler_view *old_sampler_view = stfb->surface_mask_view;
292   struct pipe_context *pipe = ctx->pipe;
293
294   if (old_sampler_view &&
295       old_sampler_view->texture->width0 == width &&
296       old_sampler_view->texture->height0 == height)
297      return;
298
299   /*
300     we use PIPE_FORMAT_B8G8R8A8_UNORM because we want to render to
301     this texture and use it as a sampler, so while this wastes some
302     space it makes both of those a lot simpler
303   */
304   stfb->surface_mask_view = create_tex_and_view(pipe,
305         PIPE_FORMAT_B8G8R8A8_UNORM, width, height);
306
307   if (!stfb->surface_mask_view) {
308      if (old_sampler_view)
309         pipe_sampler_view_reference(&old_sampler_view, NULL);
310      return;
311   }
312
313   /* XXX could this call be avoided? */
314   vg_validate_state(ctx);
315
316   /* alpha mask starts with 1.f alpha */
317   mask_fill(0, 0, width, height, 1.f);
318
319   /* if we had an old surface copy it over */
320   if (old_sampler_view) {
321      struct pipe_box src_box;
322      u_box_origin_2d(MIN2(old_sampler_view->texture->width0,
323                           stfb->surface_mask_view->texture->width0),
324                      MIN2(old_sampler_view->texture->height0,
325                           stfb->surface_mask_view->texture->height0),
326                      &src_box);
327
328      pipe->resource_copy_region(pipe,
329                                 stfb->surface_mask_view->texture,
330                                 0, 0, 0, 0,
331                                 old_sampler_view->texture,
332                                 0, &src_box);
333   }
334
335   /* Free the old texture
336    */
337   if (old_sampler_view)
338      pipe_sampler_view_reference(&old_sampler_view, NULL);
339}
340
341static void
342vg_context_update_blend_texture_view(struct vg_context *ctx,
343                                     uint width, uint height)
344{
345   struct pipe_context *pipe = ctx->pipe;
346   struct st_framebuffer *stfb = ctx->draw_buffer;
347   struct pipe_sampler_view *old = stfb->blend_texture_view;
348
349   if (old &&
350       old->texture->width0 == width &&
351       old->texture->height0 == height)
352      return;
353
354   stfb->blend_texture_view = create_tex_and_view(pipe,
355         PIPE_FORMAT_B8G8R8A8_UNORM, width, height);
356
357   pipe_sampler_view_reference(&old, NULL);
358}
359
360static boolean
361vg_context_update_depth_stencil_rb(struct vg_context * ctx,
362                                   uint width, uint height)
363{
364   struct st_renderbuffer *dsrb = ctx->draw_buffer->dsrb;
365   struct pipe_context *pipe = ctx->pipe;
366   struct pipe_surface surf_tmpl;
367
368   if ((dsrb->width == width && dsrb->height == height) && dsrb->texture)
369      return FALSE;
370
371   /* unreference existing ones */
372   pipe_surface_reference(&dsrb->surface, NULL);
373   pipe_resource_reference(&dsrb->texture, NULL);
374   dsrb->width = dsrb->height = 0;
375
376   dsrb->texture = create_texture(pipe, dsrb->format, width, height);
377   if (!dsrb->texture)
378      return TRUE;
379
380   memset(&surf_tmpl, 0, sizeof(surf_tmpl));
381   u_surface_default_template(&surf_tmpl, dsrb->texture,
382                              PIPE_BIND_DEPTH_STENCIL);
383   dsrb->surface = pipe->create_surface(pipe,
384                                        dsrb->texture,
385                                        &surf_tmpl);
386   if (!dsrb->surface) {
387      pipe_resource_reference(&dsrb->texture, NULL);
388      return TRUE;
389   }
390
391   dsrb->width = width;
392   dsrb->height = height;
393
394   assert(dsrb->surface->width == width);
395   assert(dsrb->surface->height == height);
396
397   return TRUE;
398}
399
400void vg_validate_state(struct vg_context *ctx)
401{
402   struct st_framebuffer *stfb = ctx->draw_buffer;
403
404   vg_manager_validate_framebuffer(ctx);
405
406   if (vg_context_update_depth_stencil_rb(ctx, stfb->width, stfb->height))
407      ctx->state.dirty |= DEPTH_STENCIL_DIRTY;
408
409   /* blend state depends on fb format and paint color */
410   if ((ctx->state.dirty & FRAMEBUFFER_DIRTY) ||
411       (ctx->state.dirty & PAINT_DIRTY))
412      ctx->state.dirty |= BLEND_DIRTY;
413
414   renderer_validate(ctx->renderer, ctx->state.dirty,
415         ctx->draw_buffer, &ctx->state.vg);
416
417   ctx->state.dirty = 0;
418
419   shader_set_masking(ctx->shader, ctx->state.vg.masking);
420   shader_set_image_mode(ctx->shader, ctx->state.vg.image_mode);
421   shader_set_color_transform(ctx->shader, ctx->state.vg.color_transform);
422}
423
424VGboolean vg_object_is_valid(VGHandle object, enum vg_object_type type)
425{
426   struct vg_object *obj = handle_to_object(object);
427   if (obj && is_aligned(obj) && obj->type == type)
428      return VG_TRUE;
429   else
430      return VG_FALSE;
431}
432
433void vg_set_error(struct vg_context *ctx,
434                  VGErrorCode code)
435{
436   /*vgGetError returns the oldest error code provided by
437    * an API call on the current context since the previous
438    * call to vgGetError on that context (or since the creation
439    of the context).*/
440   if (ctx->_error == VG_NO_ERROR)
441      ctx->_error = code;
442}
443
444static void vg_prepare_blend_texture(struct vg_context *ctx,
445                                     struct pipe_sampler_view *src)
446{
447   struct st_framebuffer *stfb = ctx->draw_buffer;
448   struct pipe_surface *surf;
449   struct pipe_surface surf_tmpl;
450
451   vg_context_update_blend_texture_view(ctx, stfb->width, stfb->height);
452
453   memset(&surf_tmpl, 0, sizeof(surf_tmpl));
454   u_surface_default_template(&surf_tmpl, stfb->blend_texture_view->texture,
455                              PIPE_BIND_RENDER_TARGET);
456   surf = ctx->pipe->create_surface(ctx->pipe,
457                                    stfb->blend_texture_view->texture,
458                                    &surf_tmpl);
459   if (surf) {
460      util_blit_pixels_tex(ctx->blit,
461                           src, 0, 0, stfb->width, stfb->height,
462                           surf, 0, 0, stfb->width, stfb->height,
463                           0.0, PIPE_TEX_MIPFILTER_NEAREST);
464
465      pipe_surface_reference(&surf, NULL);
466   }
467}
468
469struct pipe_sampler_view *vg_prepare_blend_surface(struct vg_context *ctx)
470{
471   struct pipe_context *pipe = ctx->pipe;
472   struct pipe_sampler_view *view;
473   struct pipe_sampler_view view_templ;
474   struct st_framebuffer *stfb = ctx->draw_buffer;
475   struct st_renderbuffer *strb = stfb->strb;
476
477   vg_validate_state(ctx);
478
479   u_sampler_view_default_template(&view_templ, strb->texture, strb->texture->format);
480   view = pipe->create_sampler_view(pipe, strb->texture, &view_templ);
481
482   vg_prepare_blend_texture(ctx, view);
483
484   pipe_sampler_view_reference(&view, NULL);
485
486   return stfb->blend_texture_view;
487}
488
489
490struct pipe_sampler_view *vg_prepare_blend_surface_from_mask(struct vg_context *ctx)
491{
492   struct st_framebuffer *stfb = ctx->draw_buffer;
493
494   vg_validate_state(ctx);
495
496   vg_context_update_surface_mask_view(ctx, stfb->width, stfb->height);
497   vg_prepare_blend_texture(ctx, stfb->surface_mask_view);
498
499   return stfb->blend_texture_view;
500}
501
502struct pipe_sampler_view *vg_get_surface_mask(struct vg_context *ctx)
503{
504   struct st_framebuffer *stfb = ctx->draw_buffer;
505
506   vg_context_update_surface_mask_view(ctx, stfb->width, stfb->height);
507
508   return stfb->surface_mask_view;
509}
510
511/**
512 * A transformation from window coordinates to paint coordinates.
513 */
514VGboolean vg_get_paint_matrix(struct vg_context *ctx,
515                              const struct matrix *paint_to_user,
516                              const struct matrix *user_to_surface,
517                              struct matrix *mat)
518{
519   struct matrix tmp;
520
521   /* get user-to-paint matrix */
522   memcpy(mat, paint_to_user, sizeof(*paint_to_user));
523   if (!matrix_invert(mat))
524      return VG_FALSE;
525
526   /* get surface-to-user matrix */
527   memcpy(&tmp, user_to_surface, sizeof(*user_to_surface));
528   if (!matrix_invert(&tmp))
529      return VG_FALSE;
530
531   matrix_mult(mat, &tmp);
532
533   return VG_TRUE;
534}
535