src/gallium/state_trackers/vega/paint.c

   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 "paint.h"
  28
  29 #include "shaders_cache.h"
  30 #include "matrix.h"
  31 #include "image.h"
  32 #include "st_inlines.h"
  33
  34 #include "pipe/p_compiler.h"
  35 #include "util/u_inlines.h"
  36
  37 #include "util/u_format.h"
  38 #include "util/u_memory.h"
  39 #include "util/u_math.h"
  40 #include "util/u_sampler.h"
  41
  42 #include "cso_cache/cso_context.h"
  43
  44 struct vg_paint {
  45    struct vg_object base;
  46
  47    VGPaintType type;
  48
  49    struct {
  50       VGfloat color[4];
  51       VGint colori[4];
  52    } solid;
  53
  54    struct {
  55       VGColorRampSpreadMode spread;
  56       VGuint color_data[1024];
  57       struct {
  58          VGfloat  coords[4];
  59          VGint  coordsi[4];
  60       } linear;
  61       struct {
  62          VGfloat vals[5];
  63          VGint valsi[5];
  64       } radial;
  65       struct pipe_sampler_view *sampler_view;
  66       struct pipe_sampler_state sampler;
  67
  68       VGfloat *ramp_stops;
  69       VGint *ramp_stopsi;
  70       VGint    num_stops;
  71
  72       VGboolean color_ramps_premultiplied;
  73    } gradient;
  74
  75    struct {
  76       struct pipe_sampler_view *sampler_view;
  77       VGTilingMode tiling_mode;
  78       struct pipe_sampler_state sampler;
  79    } pattern;
  80
  81    /* XXX next 3 all unneded? */
  82    struct pipe_buffer *cbuf;
  83    struct pipe_shader_state fs_state;
  84    void *fs;
  85 };
  86
  87 static INLINE VGuint mix_pixels(VGuint p1, VGuint a, VGuint p2, VGuint b)
  88 {
  89    VGuint t = (p1 & 0xff00ff) * a + (p2 & 0xff00ff) * b;
  90    t >>= 8; t &= 0xff00ff;
  91
  92    p1 = ((p1 >> 8) & 0xff00ff) * a + ((p2 >> 8) & 0xff00ff) * b;
  93    p1 &= 0xff00ff00; p1 |= t;
  94
  95    return p1;
  96 }
  97
  98 static INLINE VGuint float4_to_argb(const VGfloat *clr)
  99 {
 100    return float_to_ubyte(clr[3]) << 24 |
 101       float_to_ubyte(clr[0]) << 16 |
 102       float_to_ubyte(clr[1]) << 8 |
 103       float_to_ubyte(clr[2]) << 0;
 104 }
 105
 106 static INLINE void create_gradient_data(const VGfloat *ramp_stops,
 107                                         VGint num,
 108                                         VGuint *data,
 109                                         VGint size)
 110 {
 111    VGint i;
 112    VGint pos = 0;
 113    VGfloat fpos = 0, incr = 1.f / size;
 114    VGuint last_color;
 115
 116    while (fpos < ramp_stops[0]) {
 117       data[pos] = float4_to_argb(ramp_stops + 1);
 118       fpos += incr;
 119       ++pos;
 120    }
 121
 122    for (i = 0; i < num - 1; ++i) {
 123       VGint rcur  = 5 * i;
 124       VGint rnext = 5 * (i + 1);
 125       VGfloat delta = 1.f/(ramp_stops[rnext] - ramp_stops[rcur]);
 126       while (fpos < ramp_stops[rnext] && pos < size) {
 127          VGint dist = 256 * ((fpos - ramp_stops[rcur]) * delta);
 128          VGint idist = 256 - dist;
 129          VGuint current_color = float4_to_argb(ramp_stops + rcur + 1);
 130          VGuint next_color = float4_to_argb(ramp_stops + rnext + 1);
 131          data[pos] = mix_pixels(current_color, idist,
 132                                 next_color, dist);
 133          fpos += incr;
 134          ++pos;
 135       }
 136    }
 137
 138    last_color = float4_to_argb(ramp_stops + ((num - 1) * 5 + 1));
 139    while (pos < size) {
 140       data[pos] = last_color;
 141       ++pos;
 142    }
 143    data[size-1] = last_color;
 144 }
 145
 146 static INLINE struct pipe_texture *create_gradient_texture(struct vg_paint *p)
 147 {
 148    struct pipe_context *pipe = p->base.ctx->pipe;
 149    struct pipe_screen *screen = pipe->screen;
 150    struct pipe_texture *tex = 0;
 151    struct pipe_texture templ;
 152
 153    memset(&templ, 0, sizeof(templ));
 154    templ.target = PIPE_TEXTURE_1D;
 155    templ.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 156    templ.last_level = 0;
 157    templ.width0 = 1024;
 158    templ.height0 = 1;
 159    templ.depth0 = 1;
 160    templ.tex_usage = PIPE_TEXTURE_USAGE_SAMPLER;
 161
 162    tex = screen->texture_create(screen, &templ);
 163
 164    { /* upload color_data */
 165       struct pipe_transfer *transfer =
 166          st_no_flush_get_tex_transfer(p->base.ctx, tex, 0, 0, 0,
 167                                       PIPE_TRANSFER_WRITE, 0, 0, 1024, 1);
 168       void *map = pipe->transfer_map(pipe, transfer);
 169       memcpy(map, p->gradient.color_data, sizeof(VGint)*1024);
 170       pipe->transfer_unmap(pipe, transfer);
 171       pipe->tex_transfer_destroy(pipe, transfer);
 172    }
 173
 174    return tex;
 175 }
 176
 177 static INLINE struct pipe_sampler_view *create_gradient_sampler_view(struct vg_paint *p)
 178 {
 179    struct pipe_context *pipe = p->base.ctx->pipe;
 180    struct pipe_texture *texture;
 181    struct pipe_sampler_view view_templ;
 182    struct pipe_sampler_view *view;
 183
 184    texture = create_gradient_texture(p);
 185
 186    if (!texture)
 187       return NULL;
 188
 189    u_sampler_view_default_template(&view_templ, texture, texture->format);
 190    view = pipe->create_sampler_view(pipe, texture, &view_templ);
 191    /* want the texture to go away if the view is freed */
 192    pipe_texture_reference(&texture, NULL);
 193
 194    return view;
 195 }
 196
 197 struct vg_paint * paint_create(struct vg_context *ctx)
 198 {
 199    struct vg_paint *paint = CALLOC_STRUCT(vg_paint);
 200    const VGfloat default_color[] = {0.0f, 0.0f, 0.0f, 1.0f};
 201    const VGfloat def_ling[] = {0.0f, 0.0f, 1.0f, 0.0f};
 202    const VGfloat def_radg[] = {0.0f, 0.0f, 0.0f, 0.0f, 1.0f};
 203    vg_init_object(&paint->base, ctx, VG_OBJECT_PAINT);
 204    vg_context_add_object(ctx, VG_OBJECT_PAINT, paint);
 205
 206    paint->type = VG_PAINT_TYPE_COLOR;
 207    memcpy(paint->solid.color, default_color,
 208           4 * sizeof(VGfloat));
 209    paint->gradient.spread = VG_COLOR_RAMP_SPREAD_PAD;
 210    memcpy(paint->gradient.linear.coords, def_ling,
 211           4 * sizeof(VGfloat));
 212    memcpy(paint->gradient.radial.vals, def_radg,
 213           5 * sizeof(VGfloat));
 214
 215    paint->gradient.sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 216    paint->gradient.sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 217    paint->gradient.sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 218    paint->gradient.sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 219    paint->gradient.sampler.normalized_coords = 1;
 220
 221    memcpy(&paint->pattern.sampler,
 222           &paint->gradient.sampler,
 223           sizeof(struct pipe_sampler_state));
 224
 225    return paint;
 226 }
 227
 228 void paint_destroy(struct vg_paint *paint)
 229 {
 230    struct vg_context *ctx = paint->base.ctx;
 231    pipe_sampler_view_reference(&paint->gradient.sampler_view, NULL);
 232    if (paint->pattern.sampler_view)
 233       pipe_sampler_view_reference(&paint->pattern.sampler_view, NULL);
 234    if (ctx)
 235       vg_context_remove_object(ctx, VG_OBJECT_PAINT, paint);
 236
 237    free(paint->gradient.ramp_stopsi);
 238    free(paint->gradient.ramp_stops);
 239    free(paint);
 240 }
 241
 242 void paint_set_color(struct vg_paint *paint,
 243                      const VGfloat *color)
 244 {
 245    paint->solid.color[0] = color[0];
 246    paint->solid.color[1] = color[1];
 247    paint->solid.color[2] = color[2];
 248    paint->solid.color[3] = color[3];
 249
 250    paint->solid.colori[0] = FLT_TO_INT(color[0]);
 251    paint->solid.colori[1] = FLT_TO_INT(color[1]);
 252    paint->solid.colori[2] = FLT_TO_INT(color[2]);
 253    paint->solid.colori[3] = FLT_TO_INT(color[3]);
 254 }
 255
 256 static INLINE void paint_color_buffer(struct vg_paint *paint, void *buffer)
 257 {
 258    VGfloat *map = (VGfloat*)buffer;
 259    memcpy(buffer, paint->solid.color, 4 * sizeof(VGfloat));
 260    map[4] = 0.f;
 261    map[5] = 1.f;
 262    map[6] = 2.f;
 263    map[7] = 4.f;
 264 }
 265
 266 static INLINE void paint_linear_gradient_buffer(struct vg_paint *paint, void *buffer)
 267 {
 268    struct vg_context *ctx = paint->base.ctx;
 269    VGfloat *map = (VGfloat*)buffer;
 270
 271    map[0] = paint->gradient.linear.coords[2] - paint->gradient.linear.coords[0];
 272    map[1] = paint->gradient.linear.coords[3] - paint->gradient.linear.coords[1];
 273    map[2] = 1.f / (map[0] * map[0] + map[1] * map[1]);
 274    map[3] = 1.f;
 275
 276    map[4] = 0.f;
 277    map[5] = 1.f;
 278    map[6] = 2.f;
 279    map[7] = 4.f;
 280    {
 281       struct matrix mat;
 282       struct matrix inv;
 283       matrix_load_identity(&mat);
 284       matrix_translate(&mat, -paint->gradient.linear.coords[0], -paint->gradient.linear.coords[1]);
 285       memcpy(&inv, &ctx->state.vg.fill_paint_to_user_matrix,
 286              sizeof(struct matrix));
 287       matrix_invert(&inv);
 288       matrix_mult(&inv, &mat);
 289       memcpy(&mat, &inv,
 290              sizeof(struct matrix));
 291
 292       map[8]  = mat.m[0]; map[9]  = mat.m[3]; map[10] = mat.m[6]; map[11] = 0.f;
 293       map[12] = mat.m[1]; map[13] = mat.m[4]; map[14] = mat.m[7]; map[15] = 0.f;
 294       map[16] = mat.m[2]; map[17] = mat.m[5]; map[18] = mat.m[8]; map[19] = 0.f;
 295    }
 296 #if 0
 297    debug_printf("Coords  (%f, %f, %f, %f)\n",
 298                 map[0], map[1], map[2], map[3]);
 299 #endif
 300 }
 301
 302
 303 static INLINE void paint_radial_gradient_buffer(struct vg_paint *paint, void *buffer)
 304 {
 305    VGfloat *radialCoords = paint->gradient.radial.vals;
 306    struct vg_context *ctx = paint->base.ctx;
 307
 308    VGfloat *map = (VGfloat*)buffer;
 309
 310    map[0] = radialCoords[0] - radialCoords[2];
 311    map[1] = radialCoords[1] - radialCoords[3];
 312    map[2] = -map[0] * map[0] - map[1] * map[1] +
 313             radialCoords[4] * radialCoords[4];
 314    map[3] = 1.f;
 315
 316    map[4] = 0.f;
 317    map[5] = 1.f;
 318    map[6] = 2.f;
 319    map[7] = 4.f;
 320
 321    {
 322       struct matrix mat;
 323       struct matrix inv;
 324       matrix_load_identity(&mat);
 325       matrix_translate(&mat, -radialCoords[2], -radialCoords[3]);
 326       memcpy(&inv, &ctx->state.vg.fill_paint_to_user_matrix,
 327              sizeof(struct matrix));
 328       matrix_invert(&inv);
 329       matrix_mult(&inv, &mat);
 330       memcpy(&mat, &inv,
 331              sizeof(struct matrix));
 332
 333       map[8]  = mat.m[0]; map[9]  = mat.m[3]; map[10] = mat.m[6]; map[11] = 0.f;
 334       map[12] = mat.m[1]; map[13] = mat.m[4]; map[14] = mat.m[7]; map[15] = 0.f;
 335       map[16] = mat.m[2]; map[17] = mat.m[5]; map[18] = mat.m[8]; map[19] = 0.f;
 336    }
 337
 338 #if 0
 339    debug_printf("Coords  (%f, %f, %f, %f)\n",
 340                 map[0], map[1], map[2], map[3]);
 341 #endif
 342 }
 343
 344
 345 static INLINE void  paint_pattern_buffer(struct vg_paint *paint, void *buffer)
 346 {
 347    struct vg_context *ctx = paint->base.ctx;
 348
 349    VGfloat *map = (VGfloat *)buffer;
 350    memcpy(map, paint->solid.color, 4 * sizeof(VGfloat));
 351
 352    map[4] = 0.f;
 353    map[5] = 1.f;
 354    map[6] = paint->pattern.sampler_view->texture->width0;
 355    map[7] = paint->pattern.sampler_view->texture->height0;
 356    {
 357       struct matrix mat;
 358       memcpy(&mat, &ctx->state.vg.fill_paint_to_user_matrix,
 359              sizeof(struct matrix));
 360       matrix_invert(&mat);
 361       {
 362          struct matrix pm;
 363          memcpy(&pm, &ctx->state.vg.path_user_to_surface_matrix,
 364                 sizeof(struct matrix));
 365          matrix_invert(&pm);
 366          matrix_mult(&pm, &mat);
 367          memcpy(&mat, &pm, sizeof(struct matrix));
 368       }
 369
 370       map[8]  = mat.m[0]; map[9]  = mat.m[3]; map[10] = mat.m[6]; map[11] = 0.f;
 371       map[12] = mat.m[1]; map[13] = mat.m[4]; map[14] = mat.m[7]; map[15] = 0.f;
 372       map[16] = mat.m[2]; map[17] = mat.m[5]; map[18] = mat.m[8]; map[19] = 0.f;
 373    }
 374 }
 375
 376 void paint_set_type(struct vg_paint *paint, VGPaintType type)
 377 {
 378    paint->type = type;
 379 }
 380
 381 void paint_set_ramp_stops(struct vg_paint *paint, const VGfloat *stops,
 382                           int num)
 383 {
 384    const VGfloat default_stops[] = {0.0f, 0.0f, 0.0f, 0.0f, 1.0f,
 385                                     1.0f, 1.0f, 1.0f, 1.0f, 1.0f};
 386    VGint i;
 387    const VGint num_stops = num / 5;
 388    VGfloat last_coord;
 389
 390    paint->gradient.num_stops = num;
 391    if (num) {
 392       free(paint->gradient.ramp_stops);
 393       paint->gradient.ramp_stops = malloc(sizeof(VGfloat)*num);
 394       memcpy(paint->gradient.ramp_stops, stops, sizeof(VGfloat)*num);
 395    } else
 396       return;
 397
 398    /* stops must be in increasing order. the last stop is 1.0. if the
 399     * first one is bigger than 1 then the whole sequence is invalid*/
 400    if (stops[0] > 1) {
 401       stops = default_stops;
 402       num = 10;
 403    }
 404    last_coord = stops[0];
 405    for (i = 1; i < num_stops; ++i) {
 406       VGint idx = 5 * i;
 407       VGfloat coord = stops[idx];
 408       if (!floatsEqual(last_coord, coord) && coord < last_coord) {
 409          stops = default_stops;
 410          num = 10;
 411          break;
 412       }
 413       last_coord = coord;
 414    }
 415
 416    create_gradient_data(stops, num / 5, paint->gradient.color_data,
 417                         1024);
 418
 419    if (paint->gradient.sampler_view) {
 420       pipe_sampler_view_reference(&paint->gradient.sampler_view, NULL);
 421       paint->gradient.sampler_view = NULL;
 422    }
 423
 424    paint->gradient.sampler_view = create_gradient_sampler_view(paint);
 425 }
 426
 427 void paint_set_colori(struct vg_paint *p,
 428                       VGuint rgba)
 429 {
 430    p->solid.color[0] = ((rgba >> 24) & 0xff) / 255.f;
 431    p->solid.color[1] = ((rgba >> 16) & 0xff) / 255.f;
 432    p->solid.color[2] = ((rgba >>  8) & 0xff) / 255.f;
 433    p->solid.color[3] = ((rgba >>  0) & 0xff) / 255.f;
 434 }
 435
 436 VGuint paint_colori(struct vg_paint *p)
 437 {
 438 #define F2B(f) (float_to_ubyte(f))
 439
 440    return ((F2B(p->solid.color[0]) << 24) |
 441            (F2B(p->solid.color[1]) << 16) |
 442            (F2B(p->solid.color[2]) << 8)  |
 443            (F2B(p->solid.color[3]) << 0));
 444 #undef F2B
 445 }
 446
 447 void paint_set_linear_gradient(struct vg_paint *paint,
 448                                const VGfloat *coords)
 449 {
 450    memcpy(paint->gradient.linear.coords, coords, sizeof(VGfloat) * 4);
 451 }
 452
 453 void paint_set_spread_mode(struct vg_paint *paint,
 454                            VGint mode)
 455 {
 456    paint->gradient.spread = mode;
 457    switch(mode) {
 458    case VG_COLOR_RAMP_SPREAD_PAD:
 459       paint->gradient.sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 460       break;
 461    case VG_COLOR_RAMP_SPREAD_REPEAT:
 462       paint->gradient.sampler.wrap_s = PIPE_TEX_WRAP_REPEAT;
 463       break;
 464    case VG_COLOR_RAMP_SPREAD_REFLECT:
 465       paint->gradient.sampler.wrap_s = PIPE_TEX_WRAP_MIRROR_REPEAT;
 466       break;
 467    }
 468 }
 469
 470 VGColorRampSpreadMode paint_spread_mode(struct vg_paint *paint)
 471 {
 472    return paint->gradient.spread;
 473 }
 474
 475 void paint_set_radial_gradient(struct vg_paint *paint,
 476                                const VGfloat *values)
 477 {
 478    memcpy(paint->gradient.radial.vals, values, sizeof(VGfloat) * 5);
 479 }
 480
 481 void paint_set_pattern(struct vg_paint *paint,
 482                        struct vg_image *img)
 483 {
 484    if (paint->pattern.sampler_view)
 485       pipe_sampler_view_reference(&paint->pattern.sampler_view, NULL);
 486
 487    paint->pattern.sampler_view = NULL;
 488    pipe_sampler_view_reference(&paint->pattern.sampler_view,
 489                                img->sampler_view);
 490 }
 491
 492 void paint_set_pattern_tiling(struct vg_paint *paint,
 493                               VGTilingMode mode)
 494 {
 495    paint->pattern.tiling_mode = mode;
 496
 497    switch(mode) {
 498    case VG_TILE_FILL:
 499       paint->pattern.sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_BORDER;
 500       paint->pattern.sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_BORDER;
 501       break;
 502    case VG_TILE_PAD:
 503       paint->pattern.sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 504       paint->pattern.sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 505       break;
 506    case VG_TILE_REPEAT:
 507       paint->pattern.sampler.wrap_s = PIPE_TEX_WRAP_REPEAT;
 508       paint->pattern.sampler.wrap_t = PIPE_TEX_WRAP_REPEAT;
 509       break;
 510    case VG_TILE_REFLECT:
 511       paint->pattern.sampler.wrap_s = PIPE_TEX_WRAP_MIRROR_REPEAT;
 512       paint->pattern.sampler.wrap_t = PIPE_TEX_WRAP_MIRROR_REPEAT;
 513       break;
 514    default:
 515       debug_assert("!Unknown tiling mode");
 516    }
 517 }
 518
 519 void paint_get_color(struct vg_paint *paint,
 520                      VGfloat *color)
 521 {
 522    color[0] = paint->solid.color[0];
 523    color[1] = paint->solid.color[1];
 524    color[2] = paint->solid.color[2];
 525    color[3] = paint->solid.color[3];
 526 }
 527
 528 void paint_ramp_stops(struct vg_paint *paint, VGfloat *stops,
 529                       int num)
 530 {
 531    memcpy(stops, paint->gradient.ramp_stops, sizeof(VGfloat)*num);
 532 }
 533
 534 void paint_linear_gradient(struct vg_paint *paint,
 535                            VGfloat *coords)
 536 {
 537    memcpy(coords, paint->gradient.linear.coords, sizeof(VGfloat)*4);
 538 }
 539
 540 void paint_radial_gradient(struct vg_paint *paint,
 541                            VGfloat *coords)
 542 {
 543    memcpy(coords, paint->gradient.radial.vals, sizeof(VGfloat)*5);
 544 }
 545
 546 int paint_num_ramp_stops(struct vg_paint *paint)
 547 {
 548    return paint->gradient.num_stops;
 549 }
 550
 551 VGPaintType paint_type(struct vg_paint *paint)
 552 {
 553    return paint->type;
 554 }
 555
 556 void paint_set_coloriv(struct vg_paint *paint,
 557                       const VGint *color)
 558 {
 559    paint->solid.color[0] = color[0];
 560    paint->solid.color[1] = color[1];
 561    paint->solid.color[2] = color[2];
 562    paint->solid.color[3] = color[3];
 563
 564    paint->solid.colori[0] = color[0];
 565    paint->solid.colori[1] = color[1];
 566    paint->solid.colori[2] = color[2];
 567    paint->solid.colori[3] = color[3];
 568 }
 569
 570 void paint_get_coloriv(struct vg_paint *paint,
 571                       VGint *color)
 572 {
 573    color[0] = paint->solid.colori[0];
 574    color[1] = paint->solid.colori[1];
 575    color[2] = paint->solid.colori[2];
 576    color[3] = paint->solid.colori[3];
 577 }
 578
 579 void paint_set_color_ramp_premultiplied(struct vg_paint *paint,
 580                                         VGboolean set)
 581 {
 582    paint->gradient.color_ramps_premultiplied = set;
 583 }
 584
 585 VGboolean paint_color_ramp_premultiplied(struct vg_paint *paint)
 586 {
 587    return paint->gradient.color_ramps_premultiplied;
 588 }
 589
 590 void paint_set_ramp_stopsi(struct vg_paint *paint, const VGint *stops,
 591                            int num)
 592 {
 593    if (num) {
 594       free(paint->gradient.ramp_stopsi);
 595       paint->gradient.ramp_stopsi = malloc(sizeof(VGint)*num);
 596       memcpy(paint->gradient.ramp_stopsi, stops, sizeof(VGint)*num);
 597    }
 598 }
 599
 600 void paint_ramp_stopsi(struct vg_paint *paint, VGint *stops,
 601                        int num)
 602 {
 603    memcpy(stops, paint->gradient.ramp_stopsi, sizeof(VGint)*num);
 604 }
 605
 606 void paint_set_linear_gradienti(struct vg_paint *paint,
 607                                 const VGint *coords)
 608 {
 609    memcpy(paint->gradient.linear.coordsi, coords, sizeof(VGint) * 4);
 610 }
 611
 612 void paint_linear_gradienti(struct vg_paint *paint,
 613                             VGint *coords)
 614 {
 615    memcpy(coords, paint->gradient.linear.coordsi, sizeof(VGint)*4);
 616 }
 617
 618 void paint_set_radial_gradienti(struct vg_paint *paint,
 619                                 const VGint *values)
 620 {
 621    memcpy(paint->gradient.radial.valsi, values, sizeof(VGint) * 5);
 622 }
 623
 624 void paint_radial_gradienti(struct vg_paint *paint,
 625                             VGint *coords)
 626 {
 627    memcpy(coords, paint->gradient.radial.valsi, sizeof(VGint)*5);
 628 }
 629
 630 VGTilingMode paint_pattern_tiling(struct vg_paint *paint)
 631 {
 632    return paint->pattern.tiling_mode;
 633 }
 634
 635 VGint paint_bind_samplers(struct vg_paint *paint, struct pipe_sampler_state **samplers,
 636                           struct pipe_sampler_view **sampler_views)
 637 {
 638    struct vg_context *ctx = vg_current_context();
 639
 640    switch(paint->type) {
 641    case VG_PAINT_TYPE_LINEAR_GRADIENT:
 642    case VG_PAINT_TYPE_RADIAL_GRADIENT: {
 643       if (paint->gradient.sampler_view) {
 644          paint->gradient.sampler.min_img_filter = image_sampler_filter(ctx);
 645          paint->gradient.sampler.mag_img_filter = image_sampler_filter(ctx);
 646          samplers[0] = &paint->gradient.sampler;
 647          sampler_views[0] = paint->gradient.sampler_view;
 648          return 1;
 649       }
 650    }
 651       break;
 652    case VG_PAINT_TYPE_PATTERN: {
 653       memcpy(paint->pattern.sampler.border_color,
 654              ctx->state.vg.tile_fill_color,
 655              sizeof(VGfloat) * 4);
 656       paint->pattern.sampler.min_img_filter = image_sampler_filter(ctx);
 657       paint->pattern.sampler.mag_img_filter = image_sampler_filter(ctx);
 658       samplers[0] = &paint->pattern.sampler;
 659       sampler_views[0] = paint->pattern.sampler_view;
 660       return 1;
 661    }
 662       break;
 663    default:
 664       break;
 665    }
 666    return 0;
 667 }
 668
 669 void paint_resolve_type(struct vg_paint *paint)
 670 {
 671    if (paint->type == VG_PAINT_TYPE_PATTERN &&
 672        !paint->pattern.sampler_view) {
 673       paint->type = VG_PAINT_TYPE_COLOR;
 674    }
 675 }
 676
 677 VGint paint_constant_buffer_size(struct vg_paint *paint)
 678 {
 679    switch(paint->type) {
 680    case VG_PAINT_TYPE_COLOR:
 681       return 8 * sizeof(VGfloat);/*4 color + 4 constants (0.f,1.f,2.f,4.f)*/
 682       break;
 683    case VG_PAINT_TYPE_LINEAR_GRADIENT:
 684       return 20 * sizeof(VGfloat);
 685       break;
 686    case VG_PAINT_TYPE_RADIAL_GRADIENT:
 687       return 20 * sizeof(VGfloat);
 688       break;
 689    case VG_PAINT_TYPE_PATTERN:
 690       return 20 * sizeof(VGfloat);
 691       break;
 692    default:
 693       debug_printf("Uknown paint type: %d\n", paint->type);
 694    }
 695
 696    return 0;
 697 }
 698
 699 void paint_fill_constant_buffer(struct vg_paint *paint,
 700                                 void *buffer)
 701 {
 702    switch(paint->type) {
 703    case VG_PAINT_TYPE_COLOR:
 704       paint_color_buffer(paint, buffer);
 705       break;
 706    case VG_PAINT_TYPE_LINEAR_GRADIENT:
 707       paint_linear_gradient_buffer(paint, buffer);
 708       break;
 709    case VG_PAINT_TYPE_RADIAL_GRADIENT:
 710       paint_radial_gradient_buffer(paint, buffer);
 711       break;
 712    case VG_PAINT_TYPE_PATTERN:
 713       paint_pattern_buffer(paint, buffer);
 714       break;
 715
 716    default:
 717       abort();
 718    }
 719 }