mask.c revision 30cab4b6cbf741e1ae727bfaed10cc3772e4dff9 
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 "mask.h"
28
29#include "path.h"
30#include "image.h"
31#include "shaders_cache.h"
32#include "renderer.h"
33#include "asm_util.h"
34#include "st_inlines.h"
35
36#include "pipe/p_context.h"
37#include "pipe/p_screen.h"
38#include "util/u_inlines.h"
39#include "util/u_format.h"
40#include "util/u_memory.h"
41#include "util/u_sampler.h"
42
43struct vg_mask_layer {
44   struct vg_object base;
45
46   VGint width;
47   VGint height;
48
49   struct pipe_sampler_view *sampler_view;
50};
51
52static INLINE struct pipe_surface *
53alpha_mask_surface(struct vg_context *ctx, int usage)
54{
55   struct pipe_screen *screen = ctx->pipe->screen;
56   struct st_framebuffer *stfb = ctx->draw_buffer;
57   return screen->get_tex_surface(screen,
58                                  stfb->alpha_mask_view->texture,
59                                  0, 0, 0,
60                                  usage);
61}
62
63static INLINE VGboolean
64intersect_rectangles(VGint dwidth, VGint dheight,
65                     VGint swidth, VGint sheight,
66                     VGint tx, VGint ty,
67                     VGint twidth, VGint theight,
68                     VGint *offsets,
69                     VGint *location)
70{
71   if (tx + twidth <= 0 || tx >= dwidth)
72      return VG_FALSE;
73   if (ty + theight <= 0 || ty >= dheight)
74      return VG_FALSE;
75
76   offsets[0] = 0;
77   offsets[1] = 0;
78   location[0] = tx;
79   location[1] = ty;
80
81   if (tx < 0) {
82      offsets[0] -= tx;
83      location[0] = 0;
84
85      location[2] = MIN2(tx + swidth, MIN2(dwidth, tx + twidth));
86      offsets[2] = location[2];
87   } else {
88      offsets[2] = MIN2(twidth, MIN2(dwidth - tx, swidth ));
89      location[2] = offsets[2];
90   }
91
92   if (ty < 0) {
93      offsets[1] -= ty;
94      location[1] = 0;
95
96      location[3] = MIN2(ty + sheight, MIN2(dheight, ty + theight));
97      offsets[3] = location[3];
98   } else {
99      offsets[3] = MIN2(theight, MIN2(dheight - ty, sheight));
100      location[3] = offsets[3];
101   }
102
103   return VG_TRUE;
104}
105
106#if DEBUG_MASKS
107static void read_alpha_mask(void * data, VGint dataStride,
108                            VGImageFormat dataFormat,
109                            VGint sx, VGint sy,
110                            VGint width, VGint height)
111{
112   struct vg_context *ctx = vg_current_context();
113   struct pipe_context *pipe = ctx->pipe;
114   struct pipe_screen *screen = pipe->screen;
115
116   struct st_framebuffer *stfb = ctx->draw_buffer;
117   struct st_renderbuffer *strb = stfb->alpha_mask;
118
119   VGfloat temp[VEGA_MAX_IMAGE_WIDTH][4];
120   VGfloat *df = (VGfloat*)temp;
121   VGint y = (stfb->height - sy) - 1, yStep = -1;
122   VGint i;
123   VGubyte *dst = (VGubyte *)data;
124   VGint xoffset = 0, yoffset = 0;
125
126   /* make sure rendering has completed */
127   pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
128   if (sx < 0) {
129      xoffset = -sx;
130      xoffset *= _vega_size_for_format(dataFormat);
131      width += sx;
132      sx = 0;
133   }
134   if (sy < 0) {
135      yoffset = -sy;
136      height += sy;
137      sy = 0;
138      y = (stfb->height - sy) - 1;
139      yoffset *= dataStride;
140   }
141
142   {
143      struct pipe_surface *surf;
144
145      surf = screen->get_tex_surface(screen, strb->texture,  0, 0, 0,
146                                     PIPE_BIND_TRANSFER_READ);
147
148      /* Do a row at a time to flip image data vertically */
149      for (i = 0; i < height; i++) {
150#if 0
151         debug_printf("%d-%d  == %d\n", sy, height, y);
152#endif
153         pipe_get_tile_rgba(surf, sx, y, width, 1, df);
154         y += yStep;
155         _vega_pack_rgba_span_float(ctx, width, temp, dataFormat,
156                                    dst + yoffset + xoffset);
157         dst += dataStride;
158      }
159
160      pipe_surface_reference(&surf, NULL);
161   }
162}
163
164void save_alpha_to_file(const char *filename)
165{
166   struct vg_context *ctx = vg_current_context();
167   struct st_framebuffer *stfb = ctx->draw_buffer;
168   VGint *data;
169   int i, j;
170
171   data = malloc(sizeof(int) * stfb->width * stfb->height);
172   read_alpha_mask(data, stfb->width * sizeof(int),
173                   VG_sRGBA_8888,
174                   0, 0, stfb->width, stfb->height);
175   fprintf(stderr, "/*---------- start */\n");
176   fprintf(stderr, "const int image_width = %d;\n",
177           stfb->width);
178   fprintf(stderr, "const int image_height = %d;\n",
179           stfb->height);
180   fprintf(stderr, "const int image_data = {\n");
181   for (i = 0; i < stfb->height; ++i) {
182      for (j = 0; j < stfb->width; ++j) {
183         int rgba = data[i * stfb->height + j];
184         int argb = 0;
185         argb = (rgba >> 8);
186         argb |= ((rgba & 0xff) << 24);
187         fprintf(stderr, "0x%x, ", argb);
188      }
189      fprintf(stderr, "\n");
190   }
191   fprintf(stderr, "};\n");
192   fprintf(stderr, "/*---------- end */\n");
193}
194#endif
195
196/* setup mask shader */
197static void *setup_mask_operation(VGMaskOperation operation)
198{
199   struct vg_context *ctx = vg_current_context();
200   void *shader = 0;
201
202   switch (operation) {
203   case VG_UNION_MASK: {
204      if (!ctx->mask.union_fs) {
205         ctx->mask.union_fs = shader_create_from_text(ctx->pipe,
206                                                      union_mask_asm,
207                                                      200,
208                                                      PIPE_SHADER_FRAGMENT);
209      }
210      shader = ctx->mask.union_fs->driver;
211   }
212      break;
213   case VG_INTERSECT_MASK: {
214      if (!ctx->mask.intersect_fs) {
215         ctx->mask.intersect_fs = shader_create_from_text(ctx->pipe,
216                                                          intersect_mask_asm,
217                                                          200,
218                                                          PIPE_SHADER_FRAGMENT);
219      }
220      shader = ctx->mask.intersect_fs->driver;
221   }
222      break;
223   case VG_SUBTRACT_MASK: {
224      if (!ctx->mask.subtract_fs) {
225         ctx->mask.subtract_fs = shader_create_from_text(ctx->pipe,
226                                                         subtract_mask_asm,
227                                                         200,
228                                                         PIPE_SHADER_FRAGMENT);
229      }
230      shader = ctx->mask.subtract_fs->driver;
231   }
232      break;
233   case VG_SET_MASK: {
234      if (!ctx->mask.set_fs) {
235         ctx->mask.set_fs = shader_create_from_text(ctx->pipe,
236                                                    set_mask_asm,
237                                                    200,
238                                                    PIPE_SHADER_FRAGMENT);
239      }
240      shader = ctx->mask.set_fs->driver;
241   }
242      break;
243   default:
244         assert(0);
245      break;
246   }
247
248   return shader;
249}
250
251static void mask_resource_fill(struct pipe_resource *dst,
252                               int x, int y, int width, int height,
253                               VGfloat coverage)
254{
255   struct vg_context *ctx = vg_current_context();
256   VGfloat color[4] = { 0.0f, 0.0f, 0.0f, coverage };
257   void *fs;
258
259   if (x < 0) {
260      width += x;
261      x = 0;
262   }
263   if (y < 0) {
264      height += y;
265      y = 0;
266   }
267
268   fs = shaders_cache_fill(ctx->sc, VEGA_SOLID_FILL_SHADER);
269
270   if (renderer_filter_begin(ctx->renderer, dst, VG_FALSE,
271            ~0, NULL, NULL, 0, fs, (const void *) color, sizeof(color))) {
272      renderer_filter(ctx->renderer, x, y, width, height, 0, 0, 0, 0);
273      renderer_filter_end(ctx->renderer);
274   }
275
276#if DEBUG_MASKS
277   save_alpha_to_file(0);
278#endif
279}
280
281
282static void mask_using_texture(struct pipe_sampler_view *sampler_view,
283                               VGboolean is_layer,
284                               VGMaskOperation operation,
285                               VGint x, VGint y,
286                               VGint width, VGint height)
287{
288   struct vg_context *ctx = vg_current_context();
289   struct pipe_resource *dst = ctx->draw_buffer->alpha_mask_view->texture;
290   struct pipe_resource *texture = sampler_view->texture;
291   const struct pipe_sampler_state *samplers[2];
292   struct pipe_sampler_view *views[2];
293   struct pipe_sampler_state sampler;
294   VGint offsets[4], loc[4];
295   const VGfloat ones[4] = {1.f, 1.f, 1.f, 1.f};
296   void *fs;
297
298   if (!intersect_rectangles(dst->width0, dst->height0,
299                             texture->width0, texture->height0,
300                             x, y, width, height,
301                             offsets, loc))
302      return;
303#if 0
304   debug_printf("Offset = [%d, %d, %d, %d]\n", offsets[0],
305                offsets[1], offsets[2], offsets[3]);
306   debug_printf("Locati = [%d, %d, %d, %d]\n", loc[0],
307                loc[1], loc[2], loc[3]);
308#endif
309
310   sampler = ctx->mask.sampler;
311   sampler.normalized_coords = 1;
312   samplers[0] = &sampler;
313   views[0] = sampler_view;
314
315   /* prepare our blend surface */
316   vg_prepare_blend_surface_from_mask(ctx);
317   samplers[1] = &ctx->mask.sampler;
318   views[1] = ctx->draw_buffer->blend_texture_view;
319
320   fs = setup_mask_operation(operation);
321
322   if (renderer_filter_begin(ctx->renderer, dst, VG_FALSE,
323            ~0, samplers, views, 2, fs, (const void *) ones, sizeof(ones))) {
324      /* layer should be flipped when used as a texture */
325      if (is_layer) {
326         offsets[1] += offsets[3];
327         offsets[3] = -offsets[3];
328      }
329      renderer_filter(ctx->renderer,
330            loc[0], loc[1], loc[2], loc[3],
331            offsets[0], offsets[1], offsets[2], offsets[3]);
332      renderer_filter_end(ctx->renderer);
333   }
334}
335
336
337#ifdef OPENVG_VERSION_1_1
338
339struct vg_mask_layer * mask_layer_create(VGint width, VGint height)
340{
341   struct vg_context *ctx = vg_current_context();
342   struct vg_mask_layer *mask = 0;
343
344   mask = CALLOC_STRUCT(vg_mask_layer);
345   vg_init_object(&mask->base, ctx, VG_OBJECT_MASK);
346   mask->width = width;
347   mask->height = height;
348
349   {
350      struct pipe_resource pt;
351      struct pipe_context *pipe = ctx->pipe;
352      struct pipe_screen *screen = ctx->pipe->screen;
353      struct pipe_sampler_view view_templ;
354      struct pipe_sampler_view *view = NULL;
355      struct pipe_resource *texture;
356
357      memset(&pt, 0, sizeof(pt));
358      pt.target = PIPE_TEXTURE_2D;
359      pt.format = PIPE_FORMAT_B8G8R8A8_UNORM;
360      pt.last_level = 0;
361      pt.width0 = width;
362      pt.height0 = height;
363      pt.depth0 = 1;
364      pt.bind = PIPE_BIND_SAMPLER_VIEW;
365
366      texture = screen->resource_create(screen, &pt);
367
368      if (texture) {
369         u_sampler_view_default_template(&view_templ, texture, texture->format);
370         view = pipe->create_sampler_view(pipe, texture, &view_templ);
371      }
372      pipe_resource_reference(&texture, NULL);
373      mask->sampler_view = view;
374   }
375
376   vg_context_add_object(ctx, VG_OBJECT_MASK, mask);
377
378   return mask;
379}
380
381void mask_layer_destroy(struct vg_mask_layer *layer)
382{
383   struct vg_context *ctx = vg_current_context();
384
385   vg_context_remove_object(ctx, VG_OBJECT_MASK, layer);
386   pipe_sampler_view_reference(&layer->sampler_view, NULL);
387   FREE(layer);
388}
389
390void mask_layer_fill(struct vg_mask_layer *layer,
391                     VGint x, VGint y,
392                     VGint width, VGint height,
393                     VGfloat value)
394{
395   VGfloat alpha_color[4] = {0, 0, 0, 0};
396
397   alpha_color[3] = value;
398
399   mask_resource_fill(layer->sampler_view->texture,
400                      x, y, width, height, value);
401}
402
403void mask_copy(struct vg_mask_layer *layer,
404               VGint sx, VGint sy,
405               VGint dx, VGint dy,
406               VGint width, VGint height)
407{
408   struct vg_context *ctx = vg_current_context();
409   struct pipe_sampler_view *src = ctx->draw_buffer->alpha_mask_view;
410   struct pipe_surface *surf;
411
412   /* get the destination surface */
413   surf = ctx->pipe->screen->get_tex_surface(ctx->pipe->screen,
414         layer->sampler_view->texture, 0, 0, 0, PIPE_BIND_RENDER_TARGET);
415   if (surf && renderer_copy_begin(ctx->renderer, surf, VG_FALSE, src)) {
416      /* layer should be flipped when used as a texture */
417      sy += height;
418      height = -height;
419
420      renderer_copy(ctx->renderer,
421            dx, dy, width, height,
422            sx, sy, width, height);
423      renderer_copy_end(ctx->renderer);
424   }
425
426   pipe_surface_reference(&surf, NULL);
427}
428
429static void mask_layer_render_to(struct vg_mask_layer *layer,
430                                 struct path *path,
431                                 VGbitfield paint_modes)
432{
433   struct vg_context *ctx = vg_current_context();
434   struct matrix *mat = &ctx->state.vg.path_user_to_surface_matrix;
435   struct pipe_surface *surf;
436
437   surf = alpha_mask_surface(ctx, PIPE_BIND_RENDER_TARGET);
438
439   renderer_validate_for_mask_rendering(ctx->renderer, surf);
440
441   if (paint_modes & VG_FILL_PATH) {
442      path_fill(path, mat);
443   }
444
445   if (paint_modes & VG_STROKE_PATH){
446      path_stroke(path, mat);
447   }
448}
449
450void mask_render_to(struct path *path,
451                    VGbitfield paint_modes,
452                    VGMaskOperation operation)
453{
454   struct vg_context *ctx = vg_current_context();
455   struct st_framebuffer *fb_buffers = ctx->draw_buffer;
456   struct vg_mask_layer *temp_layer;
457   VGint width, height;
458
459   width = fb_buffers->alpha_mask_view->texture->width0;
460   height = fb_buffers->alpha_mask_view->texture->height0;
461
462   temp_layer = mask_layer_create(width, height);
463   mask_layer_fill(temp_layer, 0, 0, width, height, 0.0f);
464
465   mask_layer_render_to(temp_layer, path, paint_modes);
466
467   mask_using_layer(temp_layer, operation, 0, 0, width, height);
468
469   mask_layer_destroy(temp_layer);
470}
471
472void mask_using_layer(struct vg_mask_layer *layer,
473                      VGMaskOperation operation,
474                      VGint x, VGint y,
475                      VGint width, VGint height)
476{
477   mask_using_texture(layer->sampler_view, VG_TRUE, operation,
478                      x, y, width, height);
479}
480
481VGint mask_layer_width(struct vg_mask_layer *layer)
482{
483   return layer->width;
484}
485
486VGint mask_layer_height(struct vg_mask_layer *layer)
487{
488   return layer->height;
489}
490
491
492#endif
493
494void mask_using_image(struct vg_image *image,
495                      VGMaskOperation operation,
496                      VGint x, VGint y,
497                      VGint width, VGint height)
498{
499   mask_using_texture(image->sampler_view, VG_FALSE, operation,
500                      x, y, width, height);
501}
502
503void mask_fill(VGint x, VGint y, VGint width, VGint height,
504               VGfloat value)
505{
506   struct vg_context *ctx = vg_current_context();
507
508#if DEBUG_MASKS
509   debug_printf("mask_fill(%d, %d, %d, %d) with  rgba(%f, %f, %f, %f)\n",
510                x, y, width, height,
511                0.0f, 0.0f, 0.0f, value);
512#endif
513
514   mask_resource_fill(ctx->draw_buffer->alpha_mask_view->texture,
515                      x, y, width, height, value);
516}
517
518VGint mask_bind_samplers(struct pipe_sampler_state **samplers,
519                         struct pipe_sampler_view **sampler_views)
520{
521   struct vg_context *ctx = vg_current_context();
522
523   if (ctx->state.vg.masking) {
524      struct st_framebuffer *fb_buffers = ctx->draw_buffer;
525
526      samplers[1] = &ctx->mask.sampler;
527      sampler_views[1] = fb_buffers->alpha_mask_view;
528      return 1;
529   } else
530      return 0;
531}
532