1 /**********************************************************
2 * Copyright 2009-2011 VMware, Inc. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 *********************************************************
25 * Authors:
26 * Zack Rusin <zackr-at-vmware-dot-com>
27 * Thomas Hellstrom <thellstrom-at-vmware-dot-com>
28 */
29
30 #include "xa_composite.h"
31 #include "xa_context.h"
32 #include "xa_priv.h"
33 #include "cso_cache/cso_context.h"
34 #include "util/u_sampler.h"
35 #include "util/u_inlines.h"
36
37
38 /*XXX also in Xrender.h but the including it here breaks compilition */
39 #define XFixedToDouble(f) (((double) (f)) / 65536.)
40
41 struct xa_composite_blend {
42 unsigned op : 8;
43
44 unsigned alpha_dst : 4;
45 unsigned alpha_src : 4;
46
47 unsigned rgb_src : 8; /**< PIPE_BLENDFACTOR_x */
48 unsigned rgb_dst : 8; /**< PIPE_BLENDFACTOR_x */
49 };
50
51 #define XA_BLEND_OP_OVER 3
52 static const struct xa_composite_blend xa_blends[] = {
53 { xa_op_clear,
54 0, 0, PIPE_BLENDFACTOR_ZERO, PIPE_BLENDFACTOR_ZERO},
55 { xa_op_src,
56 0, 0, PIPE_BLENDFACTOR_ONE, PIPE_BLENDFACTOR_ZERO},
57 { xa_op_dst,
58 0, 0, PIPE_BLENDFACTOR_ZERO, PIPE_BLENDFACTOR_ONE},
59 { xa_op_over,
60 0, 1, PIPE_BLENDFACTOR_ONE, PIPE_BLENDFACTOR_INV_SRC_ALPHA},
61 { xa_op_over_reverse,
62 1, 0, PIPE_BLENDFACTOR_INV_DST_ALPHA, PIPE_BLENDFACTOR_ONE},
63 { xa_op_in,
64 1, 0, PIPE_BLENDFACTOR_DST_ALPHA, PIPE_BLENDFACTOR_ZERO},
65 { xa_op_in_reverse,
66 0, 1, PIPE_BLENDFACTOR_ZERO, PIPE_BLENDFACTOR_SRC_ALPHA},
67 { xa_op_out,
68 1, 0, PIPE_BLENDFACTOR_INV_DST_ALPHA, PIPE_BLENDFACTOR_ZERO},
69 { xa_op_out_reverse,
70 0, 1, PIPE_BLENDFACTOR_ZERO, PIPE_BLENDFACTOR_INV_SRC_ALPHA},
71 { xa_op_atop,
72 1, 1, PIPE_BLENDFACTOR_DST_ALPHA, PIPE_BLENDFACTOR_INV_SRC_ALPHA},
73 { xa_op_atop_reverse,
74 1, 1, PIPE_BLENDFACTOR_INV_DST_ALPHA, PIPE_BLENDFACTOR_SRC_ALPHA},
75 { xa_op_xor,
76 1, 1, PIPE_BLENDFACTOR_INV_DST_ALPHA, PIPE_BLENDFACTOR_INV_SRC_ALPHA},
77 { xa_op_add,
78 0, 0, PIPE_BLENDFACTOR_ONE, PIPE_BLENDFACTOR_ONE},
79 };
80
81 /*
82 * The alpha value stored in a L8 texture is read by the
83 * hardware as color, and R8 is read as red. The source alpha value
84 * at the end of the fragment shader is stored in all color channels,
85 * so the correct approach is to blend using DST_COLOR instead of
86 * DST_ALPHA and then output any color channel (L8) or the red channel (R8).
87 */
88 static unsigned
xa_convert_blend_for_luminance(unsigned factor)89 xa_convert_blend_for_luminance(unsigned factor)
90 {
91 switch(factor) {
92 case PIPE_BLENDFACTOR_DST_ALPHA:
93 return PIPE_BLENDFACTOR_DST_COLOR;
94 case PIPE_BLENDFACTOR_INV_DST_ALPHA:
95 return PIPE_BLENDFACTOR_INV_DST_COLOR;
96 default:
97 break;
98 }
99 return factor;
100 }
101
102 static boolean
blend_for_op(struct xa_composite_blend * blend,enum xa_composite_op op,struct xa_picture * src_pic,struct xa_picture * mask_pic,struct xa_picture * dst_pic)103 blend_for_op(struct xa_composite_blend *blend,
104 enum xa_composite_op op,
105 struct xa_picture *src_pic,
106 struct xa_picture *mask_pic,
107 struct xa_picture *dst_pic)
108 {
109 const int num_blends =
110 sizeof(xa_blends)/sizeof(struct xa_composite_blend);
111 int i;
112 boolean supported = FALSE;
113
114 /*
115 * our default in case something goes wrong
116 */
117 *blend = xa_blends[XA_BLEND_OP_OVER];
118
119 for (i = 0; i < num_blends; ++i) {
120 if (xa_blends[i].op == op) {
121 *blend = xa_blends[i];
122 supported = TRUE;
123 break;
124 }
125 }
126
127 /*
128 * No component alpha yet.
129 */
130 if (mask_pic && mask_pic->component_alpha && blend->alpha_src)
131 return FALSE;
132
133 if (!dst_pic->srf)
134 return supported;
135
136 if ((dst_pic->srf->tex->format == PIPE_FORMAT_L8_UNORM ||
137 dst_pic->srf->tex->format == PIPE_FORMAT_R8_UNORM)) {
138 blend->rgb_src = xa_convert_blend_for_luminance(blend->rgb_src);
139 blend->rgb_dst = xa_convert_blend_for_luminance(blend->rgb_dst);
140 }
141
142 /*
143 * If there's no dst alpha channel, adjust the blend op so that we'll treat
144 * it as always 1.
145 */
146
147 if (xa_format_a(dst_pic->pict_format) == 0 && blend->alpha_dst) {
148 if (blend->rgb_src == PIPE_BLENDFACTOR_DST_ALPHA)
149 blend->rgb_src = PIPE_BLENDFACTOR_ONE;
150 else if (blend->rgb_src == PIPE_BLENDFACTOR_INV_DST_ALPHA)
151 blend->rgb_src = PIPE_BLENDFACTOR_ZERO;
152 }
153
154 return supported;
155 }
156
157
158 static inline int
xa_repeat_to_gallium(int mode)159 xa_repeat_to_gallium(int mode)
160 {
161 switch(mode) {
162 case xa_wrap_clamp_to_border:
163 return PIPE_TEX_WRAP_CLAMP_TO_BORDER;
164 case xa_wrap_repeat:
165 return PIPE_TEX_WRAP_REPEAT;
166 case xa_wrap_mirror_repeat:
167 return PIPE_TEX_WRAP_MIRROR_REPEAT;
168 case xa_wrap_clamp_to_edge:
169 return PIPE_TEX_WRAP_CLAMP_TO_EDGE;
170 default:
171 break;
172 }
173 return PIPE_TEX_WRAP_REPEAT;
174 }
175
176 static inline boolean
xa_filter_to_gallium(int xrender_filter,int * out_filter)177 xa_filter_to_gallium(int xrender_filter, int *out_filter)
178 {
179
180 switch (xrender_filter) {
181 case xa_filter_nearest:
182 *out_filter = PIPE_TEX_FILTER_NEAREST;
183 break;
184 case xa_filter_linear:
185 *out_filter = PIPE_TEX_FILTER_LINEAR;
186 break;
187 default:
188 *out_filter = PIPE_TEX_FILTER_NEAREST;
189 return FALSE;
190 }
191 return TRUE;
192 }
193
194 static int
xa_is_filter_accelerated(struct xa_picture * pic)195 xa_is_filter_accelerated(struct xa_picture *pic)
196 {
197 int filter;
198 if (pic && !xa_filter_to_gallium(pic->filter, &filter))
199 return 0;
200 return 1;
201 }
202
203 /**
204 * xa_src_pict_is_accelerated - Check whether we support acceleration
205 * of the given src_pict type
206 *
207 * \param src_pic[in]: Pointer to a union xa_source_pict to check.
208 *
209 * \returns TRUE if accelerated, FALSE otherwise.
210 */
211 static boolean
xa_src_pict_is_accelerated(const union xa_source_pict * src_pic)212 xa_src_pict_is_accelerated(const union xa_source_pict *src_pic)
213 {
214 if (!src_pic)
215 return TRUE;
216
217 if (src_pic->type == xa_src_pict_solid_fill ||
218 src_pic->type == xa_src_pict_float_solid_fill)
219 return TRUE;
220
221 return FALSE;
222 }
223
224 XA_EXPORT int
xa_composite_check_accelerated(const struct xa_composite * comp)225 xa_composite_check_accelerated(const struct xa_composite *comp)
226 {
227 struct xa_picture *src_pic = comp->src;
228 struct xa_picture *mask_pic = comp->mask;
229 struct xa_composite_blend blend;
230
231 if (!xa_is_filter_accelerated(src_pic) ||
232 !xa_is_filter_accelerated(comp->mask)) {
233 return -XA_ERR_INVAL;
234 }
235
236 if (!xa_src_pict_is_accelerated(src_pic->src_pict) ||
237 (mask_pic && !xa_src_pict_is_accelerated(mask_pic->src_pict)))
238 return -XA_ERR_INVAL;
239
240 if (!blend_for_op(&blend, comp->op, comp->src, comp->mask, comp->dst))
241 return -XA_ERR_INVAL;
242
243 /*
244 * No component alpha yet.
245 */
246 if (mask_pic && mask_pic->component_alpha && blend.alpha_src)
247 return -XA_ERR_INVAL;
248
249 return XA_ERR_NONE;
250 }
251
252 static int
bind_composite_blend_state(struct xa_context * ctx,const struct xa_composite * comp)253 bind_composite_blend_state(struct xa_context *ctx,
254 const struct xa_composite *comp)
255 {
256 struct xa_composite_blend blend_opt;
257 struct pipe_blend_state blend;
258
259 if (!blend_for_op(&blend_opt, comp->op, comp->src, comp->mask, comp->dst))
260 return -XA_ERR_INVAL;
261
262 memset(&blend, 0, sizeof(struct pipe_blend_state));
263 blend.rt[0].blend_enable = 1;
264 blend.rt[0].colormask = PIPE_MASK_RGBA;
265
266 blend.rt[0].rgb_src_factor = blend_opt.rgb_src;
267 blend.rt[0].alpha_src_factor = blend_opt.rgb_src;
268 blend.rt[0].rgb_dst_factor = blend_opt.rgb_dst;
269 blend.rt[0].alpha_dst_factor = blend_opt.rgb_dst;
270
271 cso_set_blend(ctx->cso, &blend);
272 return XA_ERR_NONE;
273 }
274
275 static unsigned int
picture_format_fixups(struct xa_picture * src_pic,int mask)276 picture_format_fixups(struct xa_picture *src_pic,
277 int mask)
278 {
279 boolean set_alpha = FALSE;
280 boolean swizzle = FALSE;
281 unsigned ret = 0;
282 struct xa_surface *src = src_pic->srf;
283 enum xa_formats src_hw_format, src_pic_format;
284 enum xa_surface_type src_hw_type, src_pic_type;
285
286 if (!src)
287 return 0;
288
289 src_hw_format = xa_surface_format(src);
290 src_pic_format = src_pic->pict_format;
291
292 set_alpha = (xa_format_type_is_color(src_hw_format) &&
293 xa_format_a(src_pic_format) == 0);
294
295 if (set_alpha)
296 ret |= mask ? FS_MASK_SET_ALPHA : FS_SRC_SET_ALPHA;
297
298 if (src_hw_format == src_pic_format) {
299 if (src->tex->format == PIPE_FORMAT_L8_UNORM ||
300 src->tex->format == PIPE_FORMAT_R8_UNORM)
301 return ((mask) ? FS_MASK_LUMINANCE : FS_SRC_LUMINANCE);
302
303 return ret;
304 }
305
306 src_hw_type = xa_format_type(src_hw_format);
307 src_pic_type = xa_format_type(src_pic_format);
308
309 swizzle = ((src_hw_type == xa_type_argb &&
310 src_pic_type == xa_type_abgr) ||
311 ((src_hw_type == xa_type_abgr &&
312 src_pic_type == xa_type_argb)));
313
314 if (!swizzle && (src_hw_type != src_pic_type))
315 return ret;
316
317 if (swizzle)
318 ret |= mask ? FS_MASK_SWIZZLE_RGB : FS_SRC_SWIZZLE_RGB;
319
320 return ret;
321 }
322
323 static void
xa_src_in_mask(float src[4],const float mask[4])324 xa_src_in_mask(float src[4], const float mask[4])
325 {
326 src[0] *= mask[3];
327 src[1] *= mask[3];
328 src[2] *= mask[3];
329 src[3] *= mask[3];
330 }
331
332 /**
333 * xa_handle_src_pict - Set up xa_context state and fragment shader
334 * input based on scr_pict type
335 *
336 * \param ctx[in, out]: Pointer to the xa context.
337 * \param src_pict[in]: Pointer to the union xa_source_pict to consider.
338 * \param is_mask[in]: Whether we're considering a mask picture.
339 *
340 * \returns TRUE if succesful, FALSE otherwise.
341 *
342 * This function computes some xa_context state used to determine whether
343 * to upload the solid color and also the solid color itself used as an input
344 * to the fragment shader.
345 */
346 static boolean
xa_handle_src_pict(struct xa_context * ctx,const union xa_source_pict * src_pict,boolean is_mask)347 xa_handle_src_pict(struct xa_context *ctx,
348 const union xa_source_pict *src_pict,
349 boolean is_mask)
350 {
351 float solid_color[4];
352
353 switch(src_pict->type) {
354 case xa_src_pict_solid_fill:
355 xa_pixel_to_float4(src_pict->solid_fill.color, solid_color);
356 break;
357 case xa_src_pict_float_solid_fill:
358 memcpy(solid_color, src_pict->float_solid_fill.color,
359 sizeof(solid_color));
360 break;
361 default:
362 return FALSE;
363 }
364
365 if (is_mask && ctx->has_solid_src)
366 xa_src_in_mask(ctx->solid_color, solid_color);
367 else
368 memcpy(ctx->solid_color, solid_color, sizeof(solid_color));
369
370 if (is_mask)
371 ctx->has_solid_mask = TRUE;
372 else
373 ctx->has_solid_src = TRUE;
374
375 return TRUE;
376 }
377
378 static int
bind_shaders(struct xa_context * ctx,const struct xa_composite * comp)379 bind_shaders(struct xa_context *ctx, const struct xa_composite *comp)
380 {
381 unsigned vs_traits = 0, fs_traits = 0;
382 struct xa_shader shader;
383 struct xa_picture *src_pic = comp->src;
384 struct xa_picture *mask_pic = comp->mask;
385 struct xa_picture *dst_pic = comp->dst;
386
387 ctx->has_solid_src = FALSE;
388 ctx->has_solid_mask = FALSE;
389
390 if (dst_pic && xa_format_type(dst_pic->pict_format) !=
391 xa_format_type(xa_surface_format(dst_pic->srf)))
392 return -XA_ERR_INVAL;
393
394 if (src_pic) {
395 if (src_pic->wrap == xa_wrap_clamp_to_border && src_pic->has_transform)
396 fs_traits |= FS_SRC_REPEAT_NONE;
397
398 fs_traits |= FS_COMPOSITE;
399 vs_traits |= VS_COMPOSITE;
400
401 if (src_pic->src_pict) {
402 if (!xa_handle_src_pict(ctx, src_pic->src_pict, false))
403 return -XA_ERR_INVAL;
404 fs_traits |= FS_SRC_SRC;
405 vs_traits |= VS_SRC_SRC;
406 } else
407 fs_traits |= picture_format_fixups(src_pic, 0);
408 }
409
410 if (mask_pic) {
411 vs_traits |= VS_MASK;
412 fs_traits |= FS_MASK;
413 if (mask_pic->component_alpha)
414 fs_traits |= FS_CA;
415 if (mask_pic->src_pict) {
416 if (!xa_handle_src_pict(ctx, mask_pic->src_pict, true))
417 return -XA_ERR_INVAL;
418
419 if (ctx->has_solid_src) {
420 vs_traits &= ~VS_MASK;
421 fs_traits &= ~FS_MASK;
422 } else {
423 vs_traits |= VS_MASK_SRC;
424 fs_traits |= FS_MASK_SRC;
425 }
426 } else {
427 if (mask_pic->wrap == xa_wrap_clamp_to_border &&
428 mask_pic->has_transform)
429 fs_traits |= FS_MASK_REPEAT_NONE;
430
431 fs_traits |= picture_format_fixups(mask_pic, 1);
432 }
433 }
434
435 if (ctx->srf->format == PIPE_FORMAT_L8_UNORM ||
436 ctx->srf->format == PIPE_FORMAT_R8_UNORM)
437 fs_traits |= FS_DST_LUMINANCE;
438
439 shader = xa_shaders_get(ctx->shaders, vs_traits, fs_traits);
440 cso_set_vertex_shader_handle(ctx->cso, shader.vs);
441 cso_set_fragment_shader_handle(ctx->cso, shader.fs);
442 return XA_ERR_NONE;
443 }
444
445 static void
bind_samplers(struct xa_context * ctx,const struct xa_composite * comp)446 bind_samplers(struct xa_context *ctx,
447 const struct xa_composite *comp)
448 {
449 struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS];
450 struct pipe_sampler_state src_sampler, mask_sampler;
451 struct pipe_sampler_view view_templ;
452 struct pipe_sampler_view *src_view;
453 struct pipe_context *pipe = ctx->pipe;
454 struct xa_picture *src_pic = comp->src;
455 struct xa_picture *mask_pic = comp->mask;
456 int num_samplers = 0;
457
458 xa_ctx_sampler_views_destroy(ctx);
459 memset(&src_sampler, 0, sizeof(struct pipe_sampler_state));
460 memset(&mask_sampler, 0, sizeof(struct pipe_sampler_state));
461
462 if (src_pic && !ctx->has_solid_src) {
463 unsigned src_wrap = xa_repeat_to_gallium(src_pic->wrap);
464 int filter;
465
466 (void) xa_filter_to_gallium(src_pic->filter, &filter);
467
468 src_sampler.wrap_s = src_wrap;
469 src_sampler.wrap_t = src_wrap;
470 src_sampler.min_img_filter = filter;
471 src_sampler.mag_img_filter = filter;
472 src_sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
473 src_sampler.normalized_coords = 1;
474 samplers[0] = &src_sampler;
475 u_sampler_view_default_template(&view_templ,
476 src_pic->srf->tex,+ src_pic->srf->tex->format);
477 src_view = pipe->create_sampler_view(pipe, src_pic->srf->tex,
478 &view_templ);
479 ctx->bound_sampler_views[0] = src_view;
480 num_samplers++;
481 }
482
483 if (mask_pic && !ctx->has_solid_mask) {
484 unsigned mask_wrap = xa_repeat_to_gallium(mask_pic->wrap);
485 int filter;
486
487 (void) xa_filter_to_gallium(mask_pic->filter, &filter);
488
489 mask_sampler.wrap_s = mask_wrap;
490 mask_sampler.wrap_t = mask_wrap;
491 mask_sampler.min_img_filter = filter;
492 mask_sampler.mag_img_filter = filter;
493 src_sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
494 mask_sampler.normalized_coords = 1;
495 samplers[num_samplers] = &mask_sampler;
496 u_sampler_view_default_template(&view_templ,
497 mask_pic->srf->tex,
498 mask_pic->srf->tex->format);
499 src_view = pipe->create_sampler_view(pipe, mask_pic->srf->tex,
500 &view_templ);
501 ctx->bound_sampler_views[num_samplers] = src_view;
502 num_samplers++;
503 }
504
505 cso_set_samplers(ctx->cso, PIPE_SHADER_FRAGMENT, num_samplers,
506 (const struct pipe_sampler_state **)samplers);
507 pipe->set_sampler_views(pipe, PIPE_SHADER_FRAGMENT, 0, num_samplers, 0,
508 false, ctx->bound_sampler_views);
509 ctx->num_bound_samplers = num_samplers;
510 }
511
512 XA_EXPORT int
xa_composite_prepare(struct xa_context * ctx,const struct xa_composite * comp)513 xa_composite_prepare(struct xa_context *ctx,
514 const struct xa_composite *comp)
515 {
516 struct xa_surface *dst_srf = comp->dst->srf;
517 int ret;
518
519 ret = xa_ctx_srf_create(ctx, dst_srf);
520 if (ret != XA_ERR_NONE)
521 return ret;
522
523 ctx->dst = dst_srf;
524 renderer_bind_destination(ctx, ctx->srf);
525
526 ret = bind_composite_blend_state(ctx, comp);
527 if (ret != XA_ERR_NONE)
528 return ret;
529 ret = bind_shaders(ctx, comp);
530 if (ret != XA_ERR_NONE)
531 return ret;
532 bind_samplers(ctx, comp);
533
534 if (ctx->num_bound_samplers == 0 ) { /* solid fill */
535 renderer_begin_solid(ctx);
536 } else {
537 renderer_begin_textures(ctx);
538 ctx->comp = comp;
539 }
540
541 xa_ctx_srf_destroy(ctx);
542 return XA_ERR_NONE;
543 }
544
545 XA_EXPORT void
xa_composite_rect(struct xa_context * ctx,int srcX,int srcY,int maskX,int maskY,int dstX,int dstY,int width,int height)546 xa_composite_rect(struct xa_context *ctx,
547 int srcX, int srcY, int maskX, int maskY,
548 int dstX, int dstY, int width, int height)
549 {
550 if (ctx->num_bound_samplers == 0 ) { /* solid fill */
551 xa_scissor_update(ctx, dstX, dstY, dstX + width, dstY + height);
552 renderer_solid(ctx, dstX, dstY, dstX + width, dstY + height);
553 } else {
554 const struct xa_composite *comp = ctx->comp;
555 int pos[6] = {srcX, srcY, maskX, maskY, dstX, dstY};
556 const float *src_matrix = NULL;
557 const float *mask_matrix = NULL;
558
559 xa_scissor_update(ctx, dstX, dstY, dstX + width, dstY + height);
560
561 if (comp->src->has_transform)
562 src_matrix = comp->src->transform;
563 if (comp->mask && comp->mask->has_transform)
564 mask_matrix = comp->mask->transform;
565
566 renderer_texture(ctx, pos, width, height,
567 src_matrix, mask_matrix);
568 }
569 }
570
571 XA_EXPORT void
xa_composite_done(struct xa_context * ctx)572 xa_composite_done(struct xa_context *ctx)
573 {
574 renderer_draw_flush(ctx);
575
576 ctx->comp = NULL;
577 ctx->has_solid_src = FALSE;
578 ctx->has_solid_mask = FALSE;
579 xa_ctx_sampler_views_destroy(ctx);
580 }
581
582 static const struct xa_composite_allocation a = {
583 .xa_composite_size = sizeof(struct xa_composite),
584 .xa_picture_size = sizeof(struct xa_picture),
585 .xa_source_pict_size = sizeof(union xa_source_pict),
586 };
587
588 XA_EXPORT const struct xa_composite_allocation *
xa_composite_allocation(void)589 xa_composite_allocation(void)
590 {
591 return &a;
592 }
593