src/gallium/state_trackers/xorg/xorg_composite.c

   1 #include "xorg_composite.h"
   2
   3 #include "xorg_renderer.h"
   4 #include "xorg_exa_tgsi.h"
   5
   6 #include "cso_cache/cso_context.h"
   7 #include "util/u_draw_quad.h"
   8 #include "util/u_math.h"
   9
  10 #include "pipe/p_inlines.h"
  11
  12 /*XXX also in Xrender.h but the including it here breaks compilition */
  13 #define XFixedToDouble(f)    (((double) (f)) / 65536.)
  14
  15 struct xorg_composite_blend {
  16    int op : 8;
  17
  18    unsigned alpha_dst : 4;
  19    unsigned alpha_src : 4;
  20
  21    unsigned rgb_src : 8;    /**< PIPE_BLENDFACTOR_x */
  22    unsigned rgb_dst : 8;    /**< PIPE_BLENDFACTOR_x */
  23 };
  24
  25 #define BLEND_OP_OVER 3
  26 static const struct xorg_composite_blend xorg_blends[] = {
  27    { PictOpClear,
  28      0, 0, PIPE_BLENDFACTOR_ZERO, PIPE_BLENDFACTOR_ZERO},
  29    { PictOpSrc,
  30      0, 0, PIPE_BLENDFACTOR_ONE, PIPE_BLENDFACTOR_ZERO},
  31    { PictOpDst,
  32      0, 0, PIPE_BLENDFACTOR_ZERO, PIPE_BLENDFACTOR_ONE},
  33    { PictOpOver,
  34      0, 1, PIPE_BLENDFACTOR_ONE, PIPE_BLENDFACTOR_INV_SRC_ALPHA},
  35    { PictOpOverReverse,
  36      1, 0, PIPE_BLENDFACTOR_INV_DST_ALPHA, PIPE_BLENDFACTOR_ONE},
  37    { PictOpIn,
  38      1, 0, PIPE_BLENDFACTOR_DST_ALPHA, PIPE_BLENDFACTOR_ZERO},
  39    { PictOpInReverse,
  40      0, 1, PIPE_BLENDFACTOR_ZERO, PIPE_BLENDFACTOR_SRC_ALPHA},
  41    { PictOpOut,
  42      1, 0, PIPE_BLENDFACTOR_INV_DST_ALPHA, PIPE_BLENDFACTOR_ZERO},
  43    { PictOpOutReverse,
  44      0, 1, PIPE_BLENDFACTOR_ZERO, PIPE_BLENDFACTOR_INV_SRC_ALPHA},
  45    { PictOpAtop,
  46      1, 1, PIPE_BLENDFACTOR_DST_ALPHA, PIPE_BLENDFACTOR_INV_SRC_ALPHA},
  47    { PictOpAtopReverse,
  48      1, 1, PIPE_BLENDFACTOR_INV_DST_ALPHA, PIPE_BLENDFACTOR_SRC_ALPHA},
  49    { PictOpXor,
  50      1, 1, PIPE_BLENDFACTOR_INV_DST_ALPHA, PIPE_BLENDFACTOR_INV_SRC_ALPHA},
  51    { PictOpAdd,
  52      0, 0, PIPE_BLENDFACTOR_ONE, PIPE_BLENDFACTOR_ONE},
  53 };
  54
  55
  56 static INLINE void
  57 pixel_to_float4(Pixel pixel, float *color)
  58 {
  59    CARD32           r, g, b, a;
  60
  61    a = (pixel >> 24) & 0xff;
  62    r = (pixel >> 16) & 0xff;
  63    g = (pixel >>  8) & 0xff;
  64    b = (pixel >>  0) & 0xff;
  65    color[0] = ((float)r) / 255.;
  66    color[1] = ((float)g) / 255.;
  67    color[2] = ((float)b) / 255.;
  68    color[3] = ((float)a) / 255.;
  69 }
  70
  71 static boolean
  72 blend_for_op(struct xorg_composite_blend *blend,
  73              int op, PicturePtr pSrcPicture, PicturePtr pMaskPicture,
  74              PicturePtr pDstPicture)
  75 {
  76    const int num_blends =
  77       sizeof(xorg_blends)/sizeof(struct xorg_composite_blend);
  78    int i;
  79    boolean supported = FALSE;
  80
  81    /* our default in case something goes wrong */
  82    *blend = xorg_blends[BLEND_OP_OVER];
  83
  84    for (i = 0; i < num_blends; ++i) {
  85       if (xorg_blends[i].op == op) {
  86          *blend = xorg_blends[i];
  87          supported = TRUE;
  88       }
  89    }
  90
  91    /* If there's no dst alpha channel, adjust the blend op so that we'll treat
  92     * it as always 1. */
  93    if (pDstPicture &&
  94        PICT_FORMAT_A(pDstPicture->format) == 0 && blend->alpha_dst) {
  95       if (blend->rgb_src == PIPE_BLENDFACTOR_DST_ALPHA)
  96          blend->rgb_src = PIPE_BLENDFACTOR_ONE;
  97       else if (blend->rgb_src == PIPE_BLENDFACTOR_INV_DST_ALPHA)
  98          blend->rgb_src = PIPE_BLENDFACTOR_ZERO;
  99    }
 100
 101    /* If the source alpha is being used, then we should only be in a case where
 102     * the source blend factor is 0, and the source blend value is the mask
 103     * channels multiplied by the source picture's alpha. */
 104    if (pMaskPicture && pMaskPicture->componentAlpha &&
 105        PICT_FORMAT_RGB(pMaskPicture->format) && blend->alpha_src) {
 106       if (blend->rgb_dst == PIPE_BLENDFACTOR_SRC_ALPHA) {
 107          blend->rgb_dst = PIPE_BLENDFACTOR_SRC_COLOR;
 108       } else if (blend->rgb_dst == PIPE_BLENDFACTOR_INV_SRC_ALPHA) {
 109          blend->rgb_dst = PIPE_BLENDFACTOR_INV_SRC_COLOR;
 110       }
 111    }
 112
 113    return supported;
 114 }
 115
 116 static INLINE int
 117 render_repeat_to_gallium(int mode)
 118 {
 119    switch(mode) {
 120    case RepeatNone:
 121       return PIPE_TEX_WRAP_CLAMP_TO_BORDER;
 122    case RepeatNormal:
 123       return PIPE_TEX_WRAP_REPEAT;
 124    case RepeatReflect:
 125       return PIPE_TEX_WRAP_MIRROR_REPEAT;
 126    case RepeatPad:
 127       return PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 128    default:
 129       debug_printf("Unsupported repeat mode\n");
 130    }
 131    return PIPE_TEX_WRAP_REPEAT;
 132 }
 133
 134 static INLINE boolean
 135 render_filter_to_gallium(int xrender_filter, int *out_filter)
 136 {
 137
 138    switch (xrender_filter) {
 139    case PictFilterNearest:
 140       *out_filter = PIPE_TEX_FILTER_NEAREST;
 141       break;
 142    case PictFilterBilinear:
 143       *out_filter = PIPE_TEX_FILTER_LINEAR;
 144       break;
 145    case PictFilterFast:
 146       *out_filter = PIPE_TEX_FILTER_NEAREST;
 147       break;
 148    case PictFilterGood:
 149       *out_filter = PIPE_TEX_FILTER_LINEAR;
 150       break;
 151    case PictFilterBest:
 152       *out_filter = PIPE_TEX_FILTER_LINEAR;
 153       break;
 154    default:
 155       debug_printf("Unkown xrender filter");
 156       *out_filter = PIPE_TEX_FILTER_NEAREST;
 157       return FALSE;
 158    }
 159
 160    return TRUE;
 161 }
 162
 163 static boolean is_filter_accelerated(PicturePtr pic)
 164 {
 165    int filter;
 166    if (pic && !render_filter_to_gallium(pic->filter, &filter))
 167        return FALSE;
 168    return TRUE;
 169 }
 170
 171 boolean xorg_composite_accelerated(int op,
 172                                    PicturePtr pSrcPicture,
 173                                    PicturePtr pMaskPicture,
 174                                    PicturePtr pDstPicture)
 175 {
 176    ScreenPtr pScreen = pDstPicture->pDrawable->pScreen;
 177    ScrnInfoPtr pScrn = xf86Screens[pScreen->myNum];
 178    modesettingPtr ms = modesettingPTR(pScrn);
 179    struct xorg_composite_blend blend;
 180
 181    if (!is_filter_accelerated(pSrcPicture) ||
 182        !is_filter_accelerated(pMaskPicture)) {
 183       XORG_FALLBACK("Unsupported Xrender filter");
 184    }
 185
 186    if (pSrcPicture->pSourcePict) {
 187       if (pSrcPicture->pSourcePict->type != SourcePictTypeSolidFill)
 188          XORG_FALLBACK("Gradients not enabled (haven't been well tested)");
 189    }
 190
 191    if (blend_for_op(&blend, op,
 192                     pSrcPicture, pMaskPicture, pDstPicture)) {
 193       /* Check for component alpha */
 194       if (pMaskPicture && pMaskPicture->componentAlpha &&
 195           PICT_FORMAT_RGB(pMaskPicture->format)) {
 196          if (blend.alpha_src && blend.rgb_src != PIPE_BLENDFACTOR_ZERO) {
 197             XORG_FALLBACK("Component alpha not supported with source "
 198                           "alpha and source value blending. (op=%d)",
 199                           op);
 200          }
 201       }
 202       if ((pSrcPicture && pSrcPicture->repeatType == RepeatNone) ||
 203           (pMaskPicture && pMaskPicture->repeatType == RepeatNone)) {
 204          XORG_FALLBACK("RepeatNone is not supported");
 205       }
 206
 207       return TRUE;
 208    }
 209    XORG_FALLBACK("Unsupported composition operation = %d", op);
 210 }
 211
 212 static void
 213 bind_blend_state(struct exa_context *exa, int op,
 214                  PicturePtr pSrcPicture,
 215                  PicturePtr pMaskPicture,
 216                  PicturePtr pDstPicture)
 217 {
 218    struct xorg_composite_blend blend_opt;
 219    struct pipe_blend_state blend;
 220
 221    blend_for_op(&blend_opt, op, pSrcPicture, pMaskPicture, pDstPicture);
 222
 223    memset(&blend, 0, sizeof(struct pipe_blend_state));
 224    blend.blend_enable = 1;
 225    blend.colormask |= PIPE_MASK_RGBA;
 226
 227    blend.rgb_src_factor   = blend_opt.rgb_src;
 228    blend.alpha_src_factor = blend_opt.rgb_src;
 229    blend.rgb_dst_factor   = blend_opt.rgb_dst;
 230    blend.alpha_dst_factor = blend_opt.rgb_dst;
 231
 232    cso_set_blend(exa->renderer->cso, &blend);
 233 }
 234
 235
 236 static void
 237 bind_shaders(struct exa_context *exa, int op,
 238              PicturePtr pSrcPicture, PicturePtr pMaskPicture)
 239 {
 240    unsigned vs_traits = 0, fs_traits = 0;
 241    struct xorg_shader shader;
 242
 243    exa->has_solid_color = FALSE;
 244
 245    if (pSrcPicture) {
 246       if (pSrcPicture->pSourcePict) {
 247          if (pSrcPicture->pSourcePict->type == SourcePictTypeSolidFill) {
 248             fs_traits |= FS_SOLID_FILL;
 249             vs_traits |= VS_SOLID_FILL;
 250             debug_assert(pSrcPicture->format == PICT_a8r8g8b8);
 251             pixel_to_float4(pSrcPicture->pSourcePict->solidFill.color,
 252                             exa->solid_color);
 253             exa->has_solid_color = TRUE;
 254          } else {
 255             debug_assert("!gradients not supported");
 256          }
 257       } else {
 258          fs_traits |= FS_COMPOSITE;
 259          vs_traits |= VS_COMPOSITE;
 260       }
 261    }
 262
 263    if (pMaskPicture) {
 264       vs_traits |= VS_MASK;
 265       fs_traits |= FS_MASK;
 266       if (pMaskPicture->componentAlpha) {
 267          struct xorg_composite_blend blend;
 268          blend_for_op(&blend, op,
 269                       pSrcPicture, pMaskPicture, NULL);
 270          if (blend.alpha_src) {
 271             fs_traits |= FS_CA_SRCALPHA;
 272          } else
 273             fs_traits |= FS_CA_FULL;
 274       }
 275    }
 276
 277    shader = xorg_shaders_get(exa->renderer->shaders, vs_traits, fs_traits);
 278    cso_set_vertex_shader_handle(exa->renderer->cso, shader.vs);
 279    cso_set_fragment_shader_handle(exa->renderer->cso, shader.fs);
 280 }
 281
 282 static void
 283 bind_samplers(struct exa_context *exa, int op,
 284               PicturePtr pSrcPicture, PicturePtr pMaskPicture,
 285               PicturePtr pDstPicture,
 286               struct exa_pixmap_priv *pSrc,
 287               struct exa_pixmap_priv *pMask,
 288               struct exa_pixmap_priv *pDst)
 289 {
 290    struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS];
 291    struct pipe_sampler_state src_sampler, mask_sampler;
 292
 293    exa->num_bound_samplers = 0;
 294
 295 #if 0
 296    if ((pSrc && (exa->pipe->is_texture_referenced(exa->pipe, pSrc->tex, 0, 0) &
 297                  PIPE_REFERENCED_FOR_WRITE)) ||
 298        (pMask && (exa->pipe->is_texture_referenced(exa->pipe, pMask->tex, 0, 0) &
 299         PIPE_REFERENCED_FOR_WRITE)))
 300       xorg_exa_flush(exa, PIPE_FLUSH_RENDER_CACHE, NULL);
 301 #endif
 302
 303    memset(&src_sampler, 0, sizeof(struct pipe_sampler_state));
 304    memset(&mask_sampler, 0, sizeof(struct pipe_sampler_state));
 305
 306    if (pSrcPicture && pSrc) {
 307       if (exa->has_solid_color) {
 308          debug_assert(!"solid color with textures");
 309          samplers[0] = NULL;
 310          exa->bound_textures[0] = NULL;
 311       } else {
 312          unsigned src_wrap = render_repeat_to_gallium(
 313             pSrcPicture->repeatType);
 314          int filter;
 315
 316          render_filter_to_gallium(pSrcPicture->filter, &filter);
 317
 318          src_sampler.wrap_s = src_wrap;
 319          src_sampler.wrap_t = src_wrap;
 320          src_sampler.min_img_filter = filter;
 321          src_sampler.mag_img_filter = filter;
 322          src_sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 323          src_sampler.normalized_coords = 1;
 324          samplers[0] = &src_sampler;
 325          exa->bound_textures[0] = pSrc->tex;
 326          exa->num_bound_samplers = 1;
 327       }
 328    }
 329
 330    if (pMaskPicture && pMask) {
 331       unsigned mask_wrap = render_repeat_to_gallium(
 332          pMaskPicture->repeatType);
 333       int filter;
 334
 335       render_filter_to_gallium(pMaskPicture->filter, &filter);
 336
 337       mask_sampler.wrap_s = mask_wrap;
 338       mask_sampler.wrap_t = mask_wrap;
 339       mask_sampler.min_img_filter = filter;
 340       mask_sampler.mag_img_filter = filter;
 341       src_sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 342       mask_sampler.normalized_coords = 1;
 343       samplers[1] = &mask_sampler;
 344       exa->bound_textures[1] = pMask->tex;
 345       exa->num_bound_samplers = 2;
 346    }
 347
 348    cso_set_samplers(exa->renderer->cso, exa->num_bound_samplers,
 349                     (const struct pipe_sampler_state **)samplers);
 350    cso_set_sampler_textures(exa->renderer->cso, exa->num_bound_samplers,
 351                             exa->bound_textures);
 352 }
 353
 354 static void
 355 setup_vs_constant_buffer(struct exa_context *exa,
 356                          int width, int height)
 357 {
 358    const int param_bytes = 8 * sizeof(float);
 359    float vs_consts[8] = {
 360       2.f/width, 2.f/height, 1, 1,
 361       -1, -1, 0, 0
 362    };
 363    renderer_set_constants(exa->renderer, PIPE_SHADER_VERTEX,
 364                           vs_consts, param_bytes);
 365 }
 366
 367
 368 static void
 369 setup_fs_constant_buffer(struct exa_context *exa)
 370 {
 371    const int param_bytes = 4 * sizeof(float);
 372    const float fs_consts[8] = {
 373       0, 0, 0, 1,
 374    };
 375    renderer_set_constants(exa->renderer, PIPE_SHADER_FRAGMENT,
 376                           fs_consts, param_bytes);
 377 }
 378
 379 static void
 380 setup_constant_buffers(struct exa_context *exa, struct exa_pixmap_priv *pDst)
 381 {
 382    int width = pDst->tex->width[0];
 383    int height = pDst->tex->height[0];
 384
 385    setup_vs_constant_buffer(exa, width, height);
 386    setup_fs_constant_buffer(exa);
 387 }
 388
 389 static INLINE boolean matrix_from_pict_transform(PictTransform *trans, float *matrix)
 390 {
 391    if (!trans)
 392       return FALSE;
 393
 394    matrix[0] = XFixedToDouble(trans->matrix[0][0]);
 395    matrix[3] = XFixedToDouble(trans->matrix[0][1]);
 396    matrix[6] = XFixedToDouble(trans->matrix[0][2]);
 397
 398    matrix[1] = XFixedToDouble(trans->matrix[1][0]);
 399    matrix[4] = XFixedToDouble(trans->matrix[1][1]);
 400    matrix[7] = XFixedToDouble(trans->matrix[1][2]);
 401
 402    matrix[2] = XFixedToDouble(trans->matrix[2][0]);
 403    matrix[5] = XFixedToDouble(trans->matrix[2][1]);
 404    matrix[8] = XFixedToDouble(trans->matrix[2][2]);
 405
 406    return TRUE;
 407 }
 408
 409 static void
 410 setup_transforms(struct  exa_context *exa,
 411                  PicturePtr pSrcPicture, PicturePtr pMaskPicture)
 412 {
 413    PictTransform *src_t = NULL;
 414    PictTransform *mask_t = NULL;
 415
 416    if (pSrcPicture)
 417       src_t = pSrcPicture->transform;
 418    if (pMaskPicture)
 419       mask_t = pMaskPicture->transform;
 420
 421    exa->transform.has_src  =
 422       matrix_from_pict_transform(src_t, exa->transform.src);
 423    exa->transform.has_mask =
 424       matrix_from_pict_transform(mask_t, exa->transform.mask);
 425 }
 426
 427 boolean xorg_composite_bind_state(struct exa_context *exa,
 428                                   int op,
 429                                   PicturePtr pSrcPicture,
 430                                   PicturePtr pMaskPicture,
 431                                   PicturePtr pDstPicture,
 432                                   struct exa_pixmap_priv *pSrc,
 433                                   struct exa_pixmap_priv *pMask,
 434                                   struct exa_pixmap_priv *pDst)
 435 {
 436    renderer_bind_framebuffer(exa->renderer, pDst);
 437    renderer_bind_viewport(exa->renderer, pDst);
 438    bind_blend_state(exa, op, pSrcPicture, pMaskPicture, pDstPicture);
 439    renderer_bind_rasterizer(exa->renderer);
 440    bind_shaders(exa, op, pSrcPicture, pMaskPicture);
 441    bind_samplers(exa, op, pSrcPicture, pMaskPicture,
 442                  pDstPicture, pSrc, pMask, pDst);
 443    setup_constant_buffers(exa, pDst);
 444
 445    setup_transforms(exa, pSrcPicture, pMaskPicture);
 446
 447    if (exa->num_bound_samplers == 0 ) { /* solid fill */
 448       renderer_begin_solid(exa->renderer);
 449    } else {
 450       renderer_begin_textures(exa->renderer,
 451                               exa->bound_textures,
 452                               exa->num_bound_samplers);
 453    }
 454
 455    return TRUE;
 456 }
 457
 458 void xorg_composite(struct exa_context *exa,
 459                     struct exa_pixmap_priv *dst,
 460                     int srcX, int srcY, int maskX, int maskY,
 461                     int dstX, int dstY, int width, int height)
 462 {
 463    if (exa->num_bound_samplers == 0 ) { /* solid fill */
 464       renderer_solid(exa->renderer,
 465                      dstX, dstY, dstX + width, dstY + height,
 466                      exa->solid_color);
 467    } else {
 468       int pos[6] = {srcX, srcY, maskX, maskY, dstX, dstY};
 469       float *src_matrix = NULL;
 470       float *mask_matrix = NULL;
 471
 472       if (exa->transform.has_src)
 473          src_matrix = exa->transform.src;
 474       if (exa->transform.has_mask)
 475          mask_matrix = exa->transform.mask;
 476
 477       renderer_texture(exa->renderer,
 478                        pos, width, height,
 479                        exa->bound_textures,
 480                        exa->num_bound_samplers,
 481                        src_matrix, mask_matrix);
 482    }
 483 }
 484
 485 boolean xorg_solid_bind_state(struct exa_context *exa,
 486                               struct exa_pixmap_priv *pixmap,
 487                               Pixel fg)
 488 {
 489    unsigned vs_traits, fs_traits;
 490    struct xorg_shader shader;
 491
 492    pixel_to_float4(fg, exa->solid_color);
 493    exa->has_solid_color = TRUE;
 494
 495 #if 0
 496    debug_printf("Color Pixel=(%d, %d, %d, %d), RGBA=(%f, %f, %f, %f)\n",
 497                 (fg >> 24) & 0xff, (fg >> 16) & 0xff,
 498                 (fg >> 8) & 0xff,  (fg >> 0) & 0xff,
 499                 exa->solid_color[0], exa->solid_color[1],
 500                 exa->solid_color[2], exa->solid_color[3]);
 501 #endif
 502
 503    vs_traits = VS_SOLID_FILL;
 504    fs_traits = FS_SOLID_FILL;
 505
 506    renderer_bind_framebuffer(exa->renderer, pixmap);
 507    renderer_bind_viewport(exa->renderer, pixmap);
 508    renderer_bind_rasterizer(exa->renderer);
 509    bind_blend_state(exa, PictOpSrc, NULL, NULL, NULL);
 510    setup_constant_buffers(exa, pixmap);
 511
 512    shader = xorg_shaders_get(exa->renderer->shaders, vs_traits, fs_traits);
 513    cso_set_vertex_shader_handle(exa->renderer->cso, shader.vs);
 514    cso_set_fragment_shader_handle(exa->renderer->cso, shader.fs);
 515
 516    renderer_begin_solid(exa->renderer);
 517
 518    return TRUE;
 519 }
 520
 521 void xorg_solid(struct exa_context *exa,
 522                 struct exa_pixmap_priv *pixmap,
 523                 int x0, int y0, int x1, int y1)
 524 {
 525    renderer_solid(exa->renderer,
 526                   x0, y0, x1, y1, exa->solid_color);
 527 }
 528