src/gallium/state_trackers/xa/xa_composite.c

   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 /*
  83  * The alpha value stored in a luminance texture is read by the
  84  * hardware as color.
  85  */
  86 static unsigned
  87 xa_convert_blend_for_luminance(unsigned factor)
  88 {
  89     switch(factor) {
  90     case PIPE_BLENDFACTOR_DST_ALPHA:
  91         return PIPE_BLENDFACTOR_DST_COLOR;
  92     case PIPE_BLENDFACTOR_INV_DST_ALPHA:
  93         return PIPE_BLENDFACTOR_INV_DST_COLOR;
  94     default:
  95         break;
  96     }
  97     return factor;
  98 }
  99
 100
 101 static boolean
 102 blend_for_op(struct xa_composite_blend *blend,
 103              enum xa_composite_op op,
 104              struct xa_picture *src_pic,
 105              struct xa_picture *mask_pic,
 106              struct xa_picture *dst_pic)
 107 {
 108     const int num_blends =
 109         sizeof(xa_blends)/sizeof(struct xa_composite_blend);
 110     int i;
 111     boolean supported = FALSE;
 112
 113     /*
 114      * Temporarily disable component alpha since it appears buggy.
 115      */
 116     if (mask_pic && mask_pic->component_alpha)
 117         return FALSE;
 118
 119     /*
 120      * our default in case something goes wrong
 121      */
 122     *blend = xa_blends[XA_BLEND_OP_OVER];
 123
 124     for (i = 0; i < num_blends; ++i) {
 125         if (xa_blends[i].op == op) {
 126             *blend = xa_blends[i];
 127             supported = TRUE;
 128         }
 129     }
 130
 131     if (!dst_pic->srf)
 132         return supported;
 133
 134     if (dst_pic->srf->tex->format == PIPE_FORMAT_L8_UNORM) {
 135         blend->rgb_src = xa_convert_blend_for_luminance(blend->rgb_src);
 136         blend->rgb_dst = xa_convert_blend_for_luminance(blend->rgb_dst);
 137     }
 138
 139     /*
 140      * If there's no dst alpha channel, adjust the blend op so that we'll treat
 141      * it as always 1.
 142      */
 143
 144     if (xa_format_a(dst_pic->pict_format) == 0 && blend->alpha_dst) {
 145         if (blend->rgb_src == PIPE_BLENDFACTOR_DST_ALPHA)
 146             blend->rgb_src = PIPE_BLENDFACTOR_ONE;
 147         else if (blend->rgb_src == PIPE_BLENDFACTOR_INV_DST_ALPHA)
 148             blend->rgb_src = PIPE_BLENDFACTOR_ZERO;
 149     }
 150
 151     /*
 152      * If the source alpha is being used, then we should only be in a case where
 153      * the source blend factor is 0, and the source blend value is the mask
 154      * channels multiplied by the source picture's alpha.
 155      */
 156     if (mask_pic && mask_pic->component_alpha &&
 157         xa_format_rgb(mask_pic->pict_format) &&
 158         blend->alpha_src) {
 159         if (blend->rgb_dst == PIPE_BLENDFACTOR_SRC_ALPHA) {
 160             blend->rgb_dst = PIPE_BLENDFACTOR_SRC_COLOR;
 161         } else if (blend->rgb_dst == PIPE_BLENDFACTOR_INV_SRC_ALPHA) {
 162             blend->rgb_dst = PIPE_BLENDFACTOR_INV_SRC_COLOR;
 163         }
 164     }
 165
 166     return supported;
 167 }
 168
 169
 170 static inline int
 171 xa_repeat_to_gallium(int mode)
 172 {
 173     switch(mode) {
 174     case xa_wrap_clamp_to_border:
 175         return PIPE_TEX_WRAP_CLAMP_TO_BORDER;
 176     case xa_wrap_repeat:
 177         return PIPE_TEX_WRAP_REPEAT;
 178     case xa_wrap_mirror_repeat:
 179         return PIPE_TEX_WRAP_MIRROR_REPEAT;
 180     case xa_wrap_clamp_to_edge:
 181         return PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 182     default:
 183         break;
 184     }
 185     return PIPE_TEX_WRAP_REPEAT;
 186 }
 187
 188 static inline boolean
 189 xa_filter_to_gallium(int xrender_filter, int *out_filter)
 190 {
 191
 192     switch (xrender_filter) {
 193     case xa_filter_nearest:
 194         *out_filter = PIPE_TEX_FILTER_NEAREST;
 195         break;
 196     case xa_filter_linear:
 197         *out_filter = PIPE_TEX_FILTER_LINEAR;
 198         break;
 199     default:
 200         *out_filter = PIPE_TEX_FILTER_NEAREST;
 201         return FALSE;
 202     }
 203     return TRUE;
 204 }
 205
 206 static int
 207 xa_is_filter_accelerated(struct xa_picture *pic)
 208 {
 209     int filter;
 210     if (pic && !xa_filter_to_gallium(pic->filter, &filter))
 211         return 0;
 212     return 1;
 213 }
 214
 215 XA_EXPORT int
 216 xa_composite_check_accelerated(const struct xa_composite *comp)
 217 {
 218     struct xa_composite_blend blend;
 219     struct xa_picture *src_pic = comp->src;
 220
 221     if (!xa_is_filter_accelerated(src_pic) ||
 222         !xa_is_filter_accelerated(comp->mask)) {
 223         return -XA_ERR_INVAL;
 224     }
 225
 226
 227     if (src_pic->src_pict) {
 228         if (src_pic->src_pict->type != xa_src_pict_solid_fill)
 229             return -XA_ERR_INVAL;
 230
 231         /*
 232          * Currently we don't support solid fill with a mask.
 233          * We can easily do that, but that would require shader,
 234          * sampler view setup and vertex setup modification.
 235          */
 236         if (comp->mask)
 237             return -XA_ERR_INVAL;
 238     }
 239
 240     if (blend_for_op(&blend, comp->op, comp->src, comp->mask, comp->dst)) {
 241         struct xa_picture *mask = comp->mask;
 242         if (mask && mask->component_alpha &&
 243             xa_format_rgb(mask->pict_format)) {
 244             if (blend.alpha_src && blend.rgb_src != PIPE_BLENDFACTOR_ZERO) {
 245                 return -XA_ERR_INVAL;
 246             }
 247         }
 248
 249         return XA_ERR_NONE;
 250     }
 251     return -XA_ERR_INVAL;
 252 }
 253
 254 static int
 255 bind_composite_blend_state(struct xa_context *ctx,
 256                            const struct xa_composite *comp)
 257 {
 258     struct xa_composite_blend blend_opt;
 259     struct pipe_blend_state blend;
 260
 261     if (!blend_for_op(&blend_opt, comp->op, comp->src, comp->mask, comp->dst))
 262         return -XA_ERR_INVAL;
 263
 264     memset(&blend, 0, sizeof(struct pipe_blend_state));
 265     blend.rt[0].blend_enable = 1;
 266     blend.rt[0].colormask = PIPE_MASK_RGBA;
 267
 268     blend.rt[0].rgb_src_factor   = blend_opt.rgb_src;
 269     blend.rt[0].alpha_src_factor = blend_opt.rgb_src;
 270     blend.rt[0].rgb_dst_factor   = blend_opt.rgb_dst;
 271     blend.rt[0].alpha_dst_factor = blend_opt.rgb_dst;
 272
 273     cso_set_blend(ctx->cso, &blend);
 274     return XA_ERR_NONE;
 275 }
 276
 277 static unsigned int
 278 picture_format_fixups(struct xa_picture *src_pic,
 279                       int mask)
 280 {
 281     boolean set_alpha = FALSE;
 282     boolean swizzle = FALSE;
 283     unsigned ret = 0;
 284     struct xa_surface *src = src_pic->srf;
 285     enum xa_formats src_hw_format, src_pic_format;
 286     enum xa_surface_type src_hw_type, src_pic_type;
 287
 288     if (!src)
 289         return 0;
 290
 291     src_hw_format = xa_surface_format(src);
 292     src_pic_format = src_pic->pict_format;
 293
 294     set_alpha = (xa_format_type_is_color(src_pic_format) &&
 295                  xa_format_a(src_pic_format) == 0);
 296
 297     if (set_alpha)
 298         ret |= mask ? FS_MASK_SET_ALPHA : FS_SRC_SET_ALPHA;
 299
 300     if (src_hw_format == src_pic_format) {
 301         if (src->tex->format == PIPE_FORMAT_L8_UNORM)
 302             return ((mask) ? FS_MASK_LUMINANCE : FS_SRC_LUMINANCE);
 303
 304         return ret;
 305     }
 306
 307     src_hw_type = xa_format_type(src_hw_format);
 308     src_pic_type = xa_format_type(src_pic_format);
 309
 310     swizzle = ((src_hw_type == xa_type_argb &&
 311                 src_pic_type == xa_type_abgr) ||
 312                ((src_hw_type == xa_type_abgr &&
 313                  src_pic_type == xa_type_argb)));
 314
 315     if (!swizzle && (src_hw_type != src_pic_type))
 316       return ret;
 317
 318     if (swizzle)
 319         ret |= mask ? FS_MASK_SWIZZLE_RGB : FS_SRC_SWIZZLE_RGB;
 320
 321     return ret;
 322 }
 323
 324 static int
 325 bind_shaders(struct xa_context *ctx, const struct xa_composite *comp)
 326 {
 327     unsigned vs_traits = 0, fs_traits = 0;
 328     struct xa_shader shader;
 329     struct xa_picture *src_pic = comp->src;
 330     struct xa_picture *mask_pic = comp->mask;
 331
 332     ctx->has_solid_color = FALSE;
 333
 334     if (src_pic) {
 335         if (src_pic->wrap == xa_wrap_clamp_to_border && src_pic->has_transform)
 336             fs_traits |= FS_SRC_REPEAT_NONE;
 337
 338         if (src_pic->src_pict) {
 339             if (src_pic->src_pict->type == xa_src_pict_solid_fill) {
 340                 fs_traits |= FS_SOLID_FILL | FS_FILL;
 341                 vs_traits |= VS_SOLID_FILL;
 342                 xa_pixel_to_float4(src_pic->src_pict->solid_fill.color,
 343                                    ctx->solid_color);
 344                 ctx->has_solid_color = TRUE;
 345             }
 346         } else {
 347             fs_traits |= FS_COMPOSITE;
 348             vs_traits |= VS_COMPOSITE;
 349         }
 350
 351         fs_traits |= picture_format_fixups(src_pic, 0);
 352     }
 353
 354     if (mask_pic) {
 355         vs_traits |= VS_MASK;
 356         fs_traits |= FS_MASK;
 357         if (mask_pic->wrap == xa_wrap_clamp_to_border &&
 358             mask_pic->has_transform)
 359             fs_traits |= FS_MASK_REPEAT_NONE;
 360
 361         if (mask_pic->component_alpha) {
 362             struct xa_composite_blend blend;
 363             if (!blend_for_op(&blend, comp->op, src_pic, mask_pic, NULL))
 364                 return -XA_ERR_INVAL;
 365
 366             if (blend.alpha_src) {
 367                 fs_traits |= FS_CA_SRCALPHA;
 368             } else
 369                 fs_traits |= FS_CA_FULL;
 370         }
 371
 372         fs_traits |= picture_format_fixups(mask_pic, 1);
 373     }
 374
 375     if (ctx->srf->format == PIPE_FORMAT_L8_UNORM)
 376         fs_traits |= FS_DST_LUMINANCE;
 377
 378     shader = xa_shaders_get(ctx->shaders, vs_traits, fs_traits);
 379     cso_set_vertex_shader_handle(ctx->cso, shader.vs);
 380     cso_set_fragment_shader_handle(ctx->cso, shader.fs);
 381     return XA_ERR_NONE;
 382 }
 383
 384 static void
 385 bind_samplers(struct xa_context *ctx,
 386               const struct xa_composite *comp)
 387 {
 388     struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS];
 389     struct pipe_sampler_state src_sampler, mask_sampler;
 390     struct pipe_sampler_view view_templ;
 391     struct pipe_sampler_view *src_view;
 392     struct pipe_context *pipe = ctx->pipe;
 393     struct xa_picture *src_pic = comp->src;
 394     struct xa_picture *mask_pic = comp->mask;
 395
 396     ctx->num_bound_samplers = 0;
 397
 398     memset(&src_sampler, 0, sizeof(struct pipe_sampler_state));
 399     memset(&mask_sampler, 0, sizeof(struct pipe_sampler_state));
 400
 401     if (src_pic) {
 402         if (ctx->has_solid_color) {
 403             samplers[0] = NULL;
 404             pipe_sampler_view_reference(&ctx->bound_sampler_views[0], NULL);
 405         } else {
 406             unsigned src_wrap = xa_repeat_to_gallium(src_pic->wrap);
 407             int filter;
 408
 409             (void) xa_filter_to_gallium(src_pic->filter, &filter);
 410
 411             src_sampler.wrap_s = src_wrap;
 412             src_sampler.wrap_t = src_wrap;
 413             src_sampler.min_img_filter = filter;
 414             src_sampler.mag_img_filter = filter;
 415             src_sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 416             src_sampler.normalized_coords = 1;
 417             samplers[0] = &src_sampler;
 418             ctx->num_bound_samplers = 1;
 419             u_sampler_view_default_template(&view_templ,
 420                                             src_pic->srf->tex,
 421                                             src_pic->srf->tex->format);
 422             src_view = pipe->create_sampler_view(pipe, src_pic->srf->tex,
 423                                                  &view_templ);
 424             pipe_sampler_view_reference(&ctx->bound_sampler_views[0], NULL);
 425             ctx->bound_sampler_views[0] = src_view;
 426         }
 427     }
 428
 429     if (mask_pic) {
 430         unsigned mask_wrap = xa_repeat_to_gallium(mask_pic->wrap);
 431         int filter;
 432
 433         (void) xa_filter_to_gallium(mask_pic->filter, &filter);
 434
 435         mask_sampler.wrap_s = mask_wrap;
 436         mask_sampler.wrap_t = mask_wrap;
 437         mask_sampler.min_img_filter = filter;
 438         mask_sampler.mag_img_filter = filter;
 439         src_sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 440         mask_sampler.normalized_coords = 1;
 441         samplers[1] = &mask_sampler;
 442         ctx->num_bound_samplers = 2;
 443         u_sampler_view_default_template(&view_templ,
 444                                         mask_pic->srf->tex,
 445                                         mask_pic->srf->tex->format);
 446         src_view = pipe->create_sampler_view(pipe, mask_pic->srf->tex,
 447                                              &view_templ);
 448         pipe_sampler_view_reference(&ctx->bound_sampler_views[1], NULL);
 449         ctx->bound_sampler_views[1] = src_view;
 450
 451
 452         /*
 453          * If src is a solid color, we have no src view, so set up a
 454          * dummy one that will not be used anyway.
 455          */
 456         if (ctx->bound_sampler_views[0] == NULL)
 457             pipe_sampler_view_reference(&ctx->bound_sampler_views[0],
 458                                         src_view);
 459
 460     }
 461
 462     cso_set_samplers(ctx->cso, PIPE_SHADER_FRAGMENT, ctx->num_bound_samplers,
 463                      (const struct pipe_sampler_state **)samplers);
 464     cso_set_sampler_views(ctx->cso, PIPE_SHADER_FRAGMENT, ctx->num_bound_samplers,
 465                                    ctx->bound_sampler_views);
 466 }
 467
 468 XA_EXPORT int
 469 xa_composite_prepare(struct xa_context *ctx,
 470                      const struct xa_composite *comp)
 471 {
 472     struct xa_surface *dst_srf = comp->dst->srf;
 473     int ret;
 474
 475     if (comp->mask && !comp->mask->srf)
 476         return -XA_ERR_INVAL;
 477
 478     ret = xa_ctx_srf_create(ctx, dst_srf);
 479     if (ret != XA_ERR_NONE)
 480         return ret;
 481
 482     ctx->dst = dst_srf;
 483     renderer_bind_destination(ctx, ctx->srf);
 484
 485     ret = bind_composite_blend_state(ctx, comp);
 486     if (ret != XA_ERR_NONE)
 487         return ret;
 488     ret = bind_shaders(ctx, comp);
 489     if (ret != XA_ERR_NONE)
 490         return ret;
 491     bind_samplers(ctx, comp);
 492
 493     if (ctx->num_bound_samplers == 0 ) { /* solid fill */
 494         renderer_begin_solid(ctx);
 495     } else {
 496         renderer_begin_textures(ctx);
 497         ctx->comp = comp;
 498     }
 499
 500     xa_ctx_srf_destroy(ctx);
 501     return XA_ERR_NONE;
 502 }
 503
 504 XA_EXPORT void
 505 xa_composite_rect(struct xa_context *ctx,
 506                   int srcX, int srcY, int maskX, int maskY,
 507                   int dstX, int dstY, int width, int height)
 508 {
 509     if (ctx->num_bound_samplers == 0 ) { /* solid fill */
 510         renderer_solid(ctx, dstX, dstY, dstX + width, dstY + height,
 511                        ctx->solid_color);
 512     } else {
 513         const struct xa_composite *comp = ctx->comp;
 514         int pos[6] = {srcX, srcY, maskX, maskY, dstX, dstY};
 515         const float *src_matrix = NULL;
 516         const float *mask_matrix = NULL;
 517
 518         xa_scissor_update(ctx, dstX, dstY, dstX + width, dstY + height);
 519
 520         if (comp->src->has_transform)
 521             src_matrix = comp->src->transform;
 522         if (comp->mask && comp->mask->has_transform)
 523             mask_matrix = comp->mask->transform;
 524
 525         renderer_texture(ctx, pos, width, height,
 526                          src_matrix, mask_matrix);
 527     }
 528 }
 529
 530 XA_EXPORT void
 531 xa_composite_done(struct xa_context *ctx)
 532 {
 533     renderer_draw_flush(ctx);
 534
 535     ctx->comp = NULL;
 536     ctx->has_solid_color = FALSE;
 537     xa_ctx_sampler_views_destroy(ctx);
 538 }
 539
 540 static const struct xa_composite_allocation a = {
 541     .xa_composite_size = sizeof(struct xa_composite),
 542     .xa_picture_size = sizeof(struct xa_picture),
 543     .xa_source_pict_size = sizeof(union xa_source_pict),
 544 };
 545
 546 XA_EXPORT const struct xa_composite_allocation *
 547 xa_composite_allocation(void)
 548 {
 549     return &a;
 550 }