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;
 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       return TRUE;
 203    }
 204    XORG_FALLBACK("Unsupported composition operation = %d", op);
 205 }
 206
 207 static void
 208 bind_blend_state(struct exa_context *exa, int op,
 209                  PicturePtr pSrcPicture,
 210                  PicturePtr pMaskPicture,
 211                  PicturePtr pDstPicture)
 212 {
 213    struct xorg_composite_blend blend_opt;
 214    struct pipe_blend_state blend;
 215
 216    blend_for_op(&blend_opt, op, pSrcPicture, pMaskPicture, pDstPicture);
 217
 218    memset(&blend, 0, sizeof(struct pipe_blend_state));
 219    blend.blend_enable = 1;
 220    blend.colormask |= PIPE_MASK_RGBA;
 221
 222    blend.rgb_src_factor   = blend_opt.rgb_src;
 223    blend.alpha_src_factor = blend_opt.rgb_src;
 224    blend.rgb_dst_factor   = blend_opt.rgb_dst;
 225    blend.alpha_dst_factor = blend_opt.rgb_dst;
 226
 227    cso_set_blend(exa->renderer->cso, &blend);
 228 }
 229
 230
 231 static void
 232 bind_shaders(struct exa_context *exa, int op,
 233              PicturePtr pSrcPicture, PicturePtr pMaskPicture)
 234 {
 235    unsigned vs_traits = 0, fs_traits = 0;
 236    struct xorg_shader shader;
 237
 238    exa->has_solid_color = FALSE;
 239
 240    if (pSrcPicture) {
 241       if (pSrcPicture->pSourcePict) {
 242          if (pSrcPicture->pSourcePict->type == SourcePictTypeSolidFill) {
 243             fs_traits |= FS_SOLID_FILL;
 244             vs_traits |= VS_SOLID_FILL;
 245             debug_assert(pSrcPicture->format == PICT_a8r8g8b8);
 246             pixel_to_float4(pSrcPicture->pSourcePict->solidFill.color,
 247                             exa->solid_color);
 248             exa->has_solid_color = TRUE;
 249          } else {
 250             debug_assert("!gradients not supported");
 251          }
 252       } else {
 253          fs_traits |= FS_COMPOSITE;
 254          vs_traits |= VS_COMPOSITE;
 255       }
 256    }
 257
 258    if (pMaskPicture) {
 259       vs_traits |= VS_MASK;
 260       fs_traits |= FS_MASK;
 261       if (pMaskPicture->componentAlpha) {
 262          struct xorg_composite_blend blend;
 263          blend_for_op(&blend, op,
 264                       pSrcPicture, pMaskPicture, NULL);
 265          if (blend.alpha_src) {
 266             fs_traits |= FS_CA_SRCALPHA;
 267          } else
 268             fs_traits |= FS_CA_FULL;
 269       }
 270    }
 271
 272    shader = xorg_shaders_get(exa->renderer->shaders, vs_traits, fs_traits);
 273    cso_set_vertex_shader_handle(exa->renderer->cso, shader.vs);
 274    cso_set_fragment_shader_handle(exa->renderer->cso, shader.fs);
 275 }
 276
 277 static void
 278 bind_samplers(struct exa_context *exa, int op,
 279               PicturePtr pSrcPicture, PicturePtr pMaskPicture,
 280               PicturePtr pDstPicture,
 281               struct exa_pixmap_priv *pSrc,
 282               struct exa_pixmap_priv *pMask,
 283               struct exa_pixmap_priv *pDst)
 284 {
 285    struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS];
 286    struct pipe_sampler_state src_sampler, mask_sampler;
 287
 288    exa->num_bound_samplers = 0;
 289
 290    memset(&src_sampler, 0, sizeof(struct pipe_sampler_state));
 291    memset(&mask_sampler, 0, sizeof(struct pipe_sampler_state));
 292
 293    if (pSrcPicture && pSrc) {
 294       if (exa->has_solid_color) {
 295          debug_assert(!"solid color with textures");
 296          samplers[0] = NULL;
 297          exa->bound_textures[0] = NULL;
 298       } else {
 299          unsigned src_wrap = render_repeat_to_gallium(
 300             pSrcPicture->repeatType);
 301          int filter;
 302
 303          render_filter_to_gallium(pSrcPicture->filter, &filter);
 304
 305          src_sampler.wrap_s = src_wrap;
 306          src_sampler.wrap_t = src_wrap;
 307          src_sampler.min_img_filter = filter;
 308          src_sampler.mag_img_filter = filter;
 309          src_sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 310          src_sampler.normalized_coords = 1;
 311          samplers[0] = &src_sampler;
 312          exa->bound_textures[0] = pSrc->tex;
 313          exa->num_bound_samplers = 1;
 314       }
 315    }
 316
 317    if (pMaskPicture && pMask) {
 318       unsigned mask_wrap = render_repeat_to_gallium(
 319          pMaskPicture->repeatType);
 320       int filter;
 321
 322       render_filter_to_gallium(pMaskPicture->filter, &filter);
 323
 324       mask_sampler.wrap_s = mask_wrap;
 325       mask_sampler.wrap_t = mask_wrap;
 326       mask_sampler.min_img_filter = filter;
 327       mask_sampler.mag_img_filter = filter;
 328       src_sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NEAREST;
 329       mask_sampler.normalized_coords = 1;
 330       samplers[1] = &mask_sampler;
 331       exa->bound_textures[1] = pMask->tex;
 332       exa->num_bound_samplers = 2;
 333    }
 334
 335    cso_set_samplers(exa->renderer->cso, exa->num_bound_samplers,
 336                     (const struct pipe_sampler_state **)samplers);
 337    cso_set_sampler_textures(exa->renderer->cso, exa->num_bound_samplers,
 338                             exa->bound_textures);
 339 }
 340
 341 static void
 342 setup_vs_constant_buffer(struct exa_context *exa,
 343                          int width, int height)
 344 {
 345    const int param_bytes = 8 * sizeof(float);
 346    float vs_consts[8] = {
 347       2.f/width, 2.f/height, 1, 1,
 348       -1, -1, 0, 0
 349    };
 350    renderer_set_constants(exa->renderer, PIPE_SHADER_VERTEX,
 351                           vs_consts, param_bytes);
 352 }
 353
 354
 355 static void
 356 setup_fs_constant_buffer(struct exa_context *exa)
 357 {
 358    const int param_bytes = 4 * sizeof(float);
 359    const float fs_consts[8] = {
 360       0, 0, 0, 1,
 361    };
 362    renderer_set_constants(exa->renderer, PIPE_SHADER_FRAGMENT,
 363                           fs_consts, param_bytes);
 364 }
 365
 366 static void
 367 setup_constant_buffers(struct exa_context *exa, struct exa_pixmap_priv *pDst)
 368 {
 369    int width = pDst->tex->width[0];
 370    int height = pDst->tex->height[0];
 371
 372    setup_vs_constant_buffer(exa, width, height);
 373    setup_fs_constant_buffer(exa);
 374 }
 375
 376 static INLINE boolean matrix_from_pict_transform(PictTransform *trans, float *matrix)
 377 {
 378    if (!trans)
 379       return FALSE;
 380
 381    matrix[0] = XFixedToDouble(trans->matrix[0][0]);
 382    matrix[3] = XFixedToDouble(trans->matrix[0][1]);
 383    matrix[6] = XFixedToDouble(trans->matrix[0][2]);
 384
 385    matrix[1] = XFixedToDouble(trans->matrix[1][0]);
 386    matrix[4] = XFixedToDouble(trans->matrix[1][1]);
 387    matrix[7] = XFixedToDouble(trans->matrix[1][2]);
 388
 389    matrix[2] = XFixedToDouble(trans->matrix[2][0]);
 390    matrix[5] = XFixedToDouble(trans->matrix[2][1]);
 391    matrix[8] = XFixedToDouble(trans->matrix[2][2]);
 392
 393    return TRUE;
 394 }
 395
 396 static void
 397 setup_transforms(struct  exa_context *exa,
 398                  PicturePtr pSrcPicture, PicturePtr pMaskPicture)
 399 {
 400    PictTransform *src_t = NULL;
 401    PictTransform *mask_t = NULL;
 402
 403    if (pSrcPicture)
 404       src_t = pSrcPicture->transform;
 405    if (pMaskPicture)
 406       mask_t = pMaskPicture->transform;
 407
 408    exa->transform.has_src  =
 409       matrix_from_pict_transform(src_t, exa->transform.src);
 410    exa->transform.has_mask =
 411       matrix_from_pict_transform(mask_t, exa->transform.mask);
 412 }
 413
 414 boolean xorg_composite_bind_state(struct exa_context *exa,
 415                                   int op,
 416                                   PicturePtr pSrcPicture,
 417                                   PicturePtr pMaskPicture,
 418                                   PicturePtr pDstPicture,
 419                                   struct exa_pixmap_priv *pSrc,
 420                                   struct exa_pixmap_priv *pMask,
 421                                   struct exa_pixmap_priv *pDst)
 422 {
 423    renderer_bind_framebuffer(exa->renderer, pDst);
 424    renderer_bind_viewport(exa->renderer, pDst);
 425    bind_blend_state(exa, op, pSrcPicture, pMaskPicture, pDstPicture);
 426    renderer_bind_rasterizer(exa->renderer);
 427    bind_shaders(exa, op, pSrcPicture, pMaskPicture);
 428    bind_samplers(exa, op, pSrcPicture, pMaskPicture,
 429                  pDstPicture, pSrc, pMask, pDst);
 430    setup_constant_buffers(exa, pDst);
 431
 432    setup_transforms(exa, pSrcPicture, pMaskPicture);
 433
 434    return TRUE;
 435 }
 436
 437 void xorg_composite(struct exa_context *exa,
 438                     struct exa_pixmap_priv *dst,
 439                     int srcX, int srcY, int maskX, int maskY,
 440                     int dstX, int dstY, int width, int height)
 441 {
 442    if (exa->num_bound_samplers == 0 ) { /* solid fill */
 443       renderer_begin_solid(exa->renderer);
 444       renderer_solid(exa->renderer,
 445                      dstX, dstY, dstX + width, dstY + height,
 446                      exa->solid_color);
 447       renderer_draw_flush(exa->renderer);
 448    } else {
 449       int pos[6] = {srcX, srcY, maskX, maskY, dstX, dstY};
 450       float *src_matrix = NULL;
 451       float *mask_matrix = NULL;
 452
 453       if (exa->transform.has_src)
 454          src_matrix = exa->transform.src;
 455       if (exa->transform.has_mask)
 456          mask_matrix = exa->transform.mask;
 457
 458       renderer_draw_textures(exa->renderer,
 459                              pos, width, height,
 460                              exa->bound_textures,
 461                              exa->num_bound_samplers,
 462                              src_matrix, mask_matrix);
 463    }
 464 }
 465
 466 boolean xorg_solid_bind_state(struct exa_context *exa,
 467                               struct exa_pixmap_priv *pixmap,
 468                               Pixel fg)
 469 {
 470    unsigned vs_traits, fs_traits;
 471    struct xorg_shader shader;
 472
 473    pixel_to_float4(fg, exa->solid_color);
 474    exa->has_solid_color = TRUE;
 475
 476 #if 0
 477    debug_printf("Color Pixel=(%d, %d, %d, %d), RGBA=(%f, %f, %f, %f)\n",
 478                 (fg >> 24) & 0xff, (fg >> 16) & 0xff,
 479                 (fg >> 8) & 0xff,  (fg >> 0) & 0xff,
 480                 exa->solid_color[0], exa->solid_color[1],
 481                 exa->solid_color[2], exa->solid_color[3]);
 482 #endif
 483
 484    vs_traits = VS_SOLID_FILL;
 485    fs_traits = FS_SOLID_FILL;
 486
 487    renderer_bind_framebuffer(exa->renderer, pixmap);
 488    renderer_bind_viewport(exa->renderer, pixmap);
 489    renderer_bind_rasterizer(exa->renderer);
 490    bind_blend_state(exa, PictOpSrc, NULL, NULL, NULL);
 491    setup_constant_buffers(exa, pixmap);
 492
 493    shader = xorg_shaders_get(exa->renderer->shaders, vs_traits, fs_traits);
 494    cso_set_vertex_shader_handle(exa->renderer->cso, shader.vs);
 495    cso_set_fragment_shader_handle(exa->renderer->cso, shader.fs);
 496
 497    renderer_begin_solid(exa->renderer);
 498
 499    return TRUE;
 500 }
 501
 502 void xorg_solid(struct exa_context *exa,
 503                 struct exa_pixmap_priv *pixmap,
 504                 int x0, int y0, int x1, int y1)
 505 {
 506    renderer_solid(exa->renderer,
 507                   x0, y0, x1, y1, exa->solid_color);
 508 }
 509