src/gallium/state_trackers/vega/image.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 "image.h"
  28
  29 #include "vg_translate.h"
  30 #include "vg_context.h"
  31 #include "matrix.h"
  32 #include "renderer.h"
  33 #include "util_array.h"
  34 #include "api_consts.h"
  35 #include "shaders_cache.h"
  36 #include "shader.h"
  37
  38 #include "pipe/p_context.h"
  39 #include "pipe/p_screen.h"
  40 #include "util/u_inlines.h"
  41 #include "util/u_blit.h"
  42 #include "util/u_format.h"
  43 #include "util/u_tile.h"
  44 #include "util/u_memory.h"
  45 #include "util/u_math.h"
  46 #include "util/u_sampler.h"
  47
  48 static enum pipe_format vg_format_to_pipe(VGImageFormat format)
  49 {
  50    switch(format) {
  51    case VG_sRGB_565:
  52       return PIPE_FORMAT_B5G6R5_UNORM;
  53    case VG_sRGBA_5551:
  54       return PIPE_FORMAT_B5G5R5A1_UNORM;
  55    case VG_sRGBA_4444:
  56       return PIPE_FORMAT_B4G4R4A4_UNORM;
  57    case VG_sL_8:
  58    case VG_lL_8:
  59       return PIPE_FORMAT_L8_UNORM;
  60    case VG_BW_1:
  61       return PIPE_FORMAT_B8G8R8A8_UNORM;
  62    case VG_A_8:
  63       return PIPE_FORMAT_A8_UNORM;
  64 #ifdef OPENVG_VERSION_1_1
  65    case VG_A_1:
  66    case VG_A_4:
  67       return PIPE_FORMAT_A8_UNORM;
  68 #endif
  69    default:
  70       return PIPE_FORMAT_B8G8R8A8_UNORM;
  71    }
  72 }
  73
  74 static INLINE void vg_sync_size(VGfloat *src_loc, VGfloat *dst_loc)
  75 {
  76    src_loc[2] = MIN2(src_loc[2], dst_loc[2]);
  77    src_loc[3] = MIN2(src_loc[3], dst_loc[3]);
  78    dst_loc[2] = src_loc[2];
  79    dst_loc[3] = src_loc[3];
  80 }
  81
  82
  83 static void vg_copy_texture(struct vg_context *ctx,
  84                             struct pipe_resource *dst, VGint dx, VGint dy,
  85                             struct pipe_sampler_view *src, VGint sx, VGint sy,
  86                             VGint width, VGint height)
  87 {
  88    VGfloat dst_loc[4], src_loc[4];
  89    VGfloat dst_bounds[4], src_bounds[4];
  90    VGfloat src_shift[4], dst_shift[4], shift[4];
  91
  92    dst_loc[0] = dx;
  93    dst_loc[1] = dy;
  94    dst_loc[2] = width;
  95    dst_loc[3] = height;
  96    dst_bounds[0] = 0.f;
  97    dst_bounds[1] = 0.f;
  98    dst_bounds[2] = dst->width0;
  99    dst_bounds[3] = dst->height0;
 100
 101    src_loc[0] = sx;
 102    src_loc[1] = sy;
 103    src_loc[2] = width;
 104    src_loc[3] = height;
 105    src_bounds[0] = 0.f;
 106    src_bounds[1] = 0.f;
 107    src_bounds[2] = src->texture->width0;
 108    src_bounds[3] = src->texture->height0;
 109
 110    vg_bound_rect(src_loc, src_bounds, src_shift);
 111    vg_bound_rect(dst_loc, dst_bounds, dst_shift);
 112    shift[0] = src_shift[0] - dst_shift[0];
 113    shift[1] = src_shift[1] - dst_shift[1];
 114
 115    if (shift[0] < 0)
 116       vg_shift_rectx(src_loc, src_bounds, -shift[0]);
 117    else
 118       vg_shift_rectx(dst_loc, dst_bounds, shift[0]);
 119
 120    if (shift[1] < 0)
 121       vg_shift_recty(src_loc, src_bounds, -shift[1]);
 122    else
 123       vg_shift_recty(dst_loc, dst_bounds, shift[1]);
 124
 125    vg_sync_size(src_loc, dst_loc);
 126
 127    if (src_loc[2] >= 0 && src_loc[3] >= 0 &&
 128        dst_loc[2] >= 0 && dst_loc[3] >= 0) {
 129       renderer_copy_texture(ctx->renderer,
 130                             src,
 131                             src_loc[0],
 132                             src_loc[1] + src_loc[3],
 133                             src_loc[0] + src_loc[2],
 134                             src_loc[1],
 135                             dst,
 136                             dst_loc[0],
 137                             dst_loc[1] + dst_loc[3],
 138                             dst_loc[0] + dst_loc[2],
 139                             dst_loc[1]);
 140    }
 141
 142 }
 143
 144 void vg_copy_surface(struct vg_context *ctx,
 145                      struct pipe_surface *dst, VGint dx, VGint dy,
 146                      struct pipe_surface *src, VGint sx, VGint sy,
 147                      VGint width, VGint height)
 148 {
 149    VGfloat dst_loc[4], src_loc[4];
 150    VGfloat dst_bounds[4], src_bounds[4];
 151    VGfloat src_shift[4], dst_shift[4], shift[4];
 152
 153    dst_loc[0] = dx;
 154    dst_loc[1] = dy;
 155    dst_loc[2] = width;
 156    dst_loc[3] = height;
 157    dst_bounds[0] = 0.f;
 158    dst_bounds[1] = 0.f;
 159    dst_bounds[2] = dst->width;
 160    dst_bounds[3] = dst->height;
 161
 162    src_loc[0] = sx;
 163    src_loc[1] = sy;
 164    src_loc[2] = width;
 165    src_loc[3] = height;
 166    src_bounds[0] = 0.f;
 167    src_bounds[1] = 0.f;
 168    src_bounds[2] = src->width;
 169    src_bounds[3] = src->height;
 170
 171    vg_bound_rect(src_loc, src_bounds, src_shift);
 172    vg_bound_rect(dst_loc, dst_bounds, dst_shift);
 173    shift[0] = src_shift[0] - dst_shift[0];
 174    shift[1] = src_shift[1] - dst_shift[1];
 175
 176    if (shift[0] < 0)
 177       vg_shift_rectx(src_loc, src_bounds, -shift[0]);
 178    else
 179       vg_shift_rectx(dst_loc, dst_bounds, shift[0]);
 180
 181    if (shift[1] < 0)
 182       vg_shift_recty(src_loc, src_bounds, -shift[1]);
 183    else
 184       vg_shift_recty(dst_loc, dst_bounds, shift[1]);
 185
 186    vg_sync_size(src_loc, dst_loc);
 187
 188    if (src_loc[2] > 0 && src_loc[3] > 0 &&
 189        dst_loc[2] > 0 && dst_loc[3] > 0) {
 190       if (src == dst)
 191          renderer_copy_surface(ctx->renderer,
 192                                src,
 193                                src_loc[0],
 194                                src->height - (src_loc[1] + src_loc[3]),
 195                                src_loc[0] + src_loc[2],
 196                                src->height - src_loc[1],
 197                                dst,
 198                                dst_loc[0],
 199                                dst->height - (dst_loc[1] + dst_loc[3]),
 200                                dst_loc[0] + dst_loc[2],
 201                                dst->height - dst_loc[1],
 202                                0, 0);
 203       else
 204          renderer_copy_surface(ctx->renderer,
 205                                src,
 206                                src_loc[0],
 207                                src->height - src_loc[1],
 208                                src_loc[0] + src_loc[2],
 209                                src->height - (src_loc[1] + src_loc[3]),
 210                                dst,
 211                                dst_loc[0],
 212                                dst->height - (dst_loc[1] + dst_loc[3]),
 213                                dst_loc[0] + dst_loc[2],
 214                                dst->height - dst_loc[1],
 215                                0, 0);
 216    }
 217
 218 }
 219
 220 static struct pipe_resource *image_texture(struct vg_image *img)
 221 {
 222    struct pipe_resource *tex = img->sampler_view->texture;
 223    return tex;
 224 }
 225
 226
 227 static void image_cleari(struct vg_image *img, VGint clear_colori,
 228                          VGint x, VGint y, VGint width, VGint height)
 229 {
 230    VGint *clearbuf;
 231    VGint i;
 232    VGfloat dwidth, dheight;
 233
 234    clearbuf = malloc(sizeof(VGint)*width*height);
 235    for (i = 0; i < width*height; ++i)
 236       clearbuf[i] = clear_colori;
 237
 238    dwidth = MIN2(width, img->width);
 239    dheight = MIN2(height, img->height);
 240
 241    image_sub_data(img, clearbuf, width * sizeof(VGint),
 242                   VG_sRGBA_8888,
 243                   x, y, dwidth, dheight);
 244    free(clearbuf);
 245 }
 246
 247 struct vg_image * image_create(VGImageFormat format,
 248                                VGint width, VGint height)
 249 {
 250    struct vg_context *ctx = vg_current_context();
 251    struct pipe_context *pipe = ctx->pipe;
 252    struct vg_image *image = CALLOC_STRUCT(vg_image);
 253    enum pipe_format pformat = vg_format_to_pipe(format);
 254    struct pipe_resource pt, *newtex;
 255    struct pipe_sampler_view view_templ;
 256    struct pipe_sampler_view *view;
 257    struct pipe_screen *screen = ctx->pipe->screen;
 258
 259    vg_init_object(&image->base, ctx, VG_OBJECT_IMAGE);
 260
 261    image->format = format;
 262    image->width = width;
 263    image->height = height;
 264
 265    image->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 266    image->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 267    image->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 268    image->sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 269    image->sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 270    image->sampler.normalized_coords = 1;
 271
 272    assert(screen->is_format_supported(screen, pformat, PIPE_TEXTURE_2D,
 273                                       0, PIPE_BIND_SAMPLER_VIEW, 0));
 274
 275    memset(&pt, 0, sizeof(pt));
 276    pt.target = PIPE_TEXTURE_2D;
 277    pt.format = pformat;
 278    pt.last_level = 0;
 279    pt.width0 = width;
 280    pt.height0 = height;
 281    pt.depth0 = 1;
 282    pt.bind = PIPE_BIND_SAMPLER_VIEW;
 283
 284    newtex = screen->resource_create(screen, &pt);
 285
 286    debug_assert(newtex);
 287
 288    u_sampler_view_default_template(&view_templ, newtex, newtex->format);
 289    view = pipe->create_sampler_view(pipe, newtex, &view_templ);
 290    /* want the texture to go away if the view is freed */
 291    pipe_resource_reference(&newtex, NULL);
 292
 293    image->sampler_view = view;
 294
 295    vg_context_add_object(ctx, VG_OBJECT_IMAGE, image);
 296
 297    image_cleari(image, 0, 0, 0, image->width, image->height);
 298    return image;
 299 }
 300
 301 void image_destroy(struct vg_image *img)
 302 {
 303    struct vg_context *ctx = vg_current_context();
 304    vg_context_remove_object(ctx, VG_OBJECT_IMAGE, img);
 305
 306
 307    if (img->parent) {
 308       /* remove img from the parent child array */
 309       int idx;
 310       struct vg_image **array =
 311          (struct vg_image **)img->parent->children_array->data;
 312
 313       for (idx = 0; idx < img->parent->children_array->num_elements; ++idx) {
 314          struct vg_image *child = array[idx];
 315          if (child == img) {
 316             break;
 317          }
 318       }
 319       debug_assert(idx < img->parent->children_array->num_elements);
 320       array_remove_element(img->parent->children_array, idx);
 321    }
 322
 323    if (img->children_array && img->children_array->num_elements) {
 324       /* reparent the children */
 325       VGint i;
 326       struct vg_image *parent = img->parent;
 327       struct vg_image **children =
 328          (struct vg_image **)img->children_array->data;
 329       if (!parent) {
 330          VGint min_x = children[0]->x;
 331          parent = children[0];
 332
 333          for (i = 1; i < img->children_array->num_elements; ++i) {
 334             struct vg_image *child = children[i];
 335             if (child->x < min_x) {
 336                parent = child;
 337             }
 338          }
 339       }
 340
 341       for (i = 0; i < img->children_array->num_elements; ++i) {
 342          struct vg_image *child = children[i];
 343          if (child != parent) {
 344             child->parent = parent;
 345             if (!parent->children_array) {
 346                parent->children_array = array_create(
 347                   sizeof(struct vg_image*));
 348             }
 349             array_append_data(parent->children_array,
 350                               &child, 1);
 351          } else
 352             child->parent = NULL;
 353       }
 354       array_destroy(img->children_array);
 355    }
 356
 357    pipe_sampler_view_reference(&img->sampler_view, NULL);
 358    free(img);
 359 }
 360
 361 void image_clear(struct vg_image *img,
 362                  VGint x, VGint y, VGint width, VGint height)
 363 {
 364    struct vg_context *ctx = vg_current_context();
 365    VGfloat *clear_colorf = ctx->state.vg.clear_color;
 366    VGubyte r, g, b ,a;
 367    VGint clear_colori;
 368    /* FIXME: this is very nasty */
 369    r = float_to_ubyte(clear_colorf[0]);
 370    g = float_to_ubyte(clear_colorf[1]);
 371    b = float_to_ubyte(clear_colorf[2]);
 372    a = float_to_ubyte(clear_colorf[3]);
 373    clear_colori = r << 24 | g << 16 | b << 8 | a;
 374    image_cleari(img, clear_colori, x, y, width, height);
 375 }
 376
 377 void image_sub_data(struct vg_image *image,
 378                     const void * data,
 379                     VGint dataStride,
 380                     VGImageFormat dataFormat,
 381                     VGint x, VGint y,
 382                     VGint width, VGint height)
 383 {
 384    const VGint yStep = 1;
 385    VGubyte *src = (VGubyte *)data;
 386    VGfloat temp[VEGA_MAX_IMAGE_WIDTH][4];
 387    VGfloat *df = (VGfloat*)temp;
 388    VGint i;
 389    struct vg_context *ctx = vg_current_context();
 390    struct pipe_context *pipe = ctx->pipe;
 391    struct pipe_resource *texture = image_texture(image);
 392    VGint xoffset = 0, yoffset = 0;
 393
 394    if (x < 0) {
 395       xoffset -= x;
 396       width += x;
 397       x = 0;
 398    }
 399    if (y < 0) {
 400       yoffset -= y;
 401       height += y;
 402       y = 0;
 403    }
 404
 405    if (width <= 0 || height <= 0) {
 406       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 407       return;
 408    }
 409
 410    if (x > image->width || y > image->width) {
 411       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 412       return;
 413    }
 414
 415    if (x + width > image->width) {
 416       width = image->width - x;
 417    }
 418
 419    if (y + height > image->height) {
 420       height = image->height - y;
 421    }
 422
 423    { /* upload color_data */
 424       struct pipe_transfer *transfer = pipe_get_transfer(
 425          pipe, texture, 0, 0, 0,
 426          PIPE_TRANSFER_WRITE, 0, 0, texture->width0, texture->height0);
 427       src += (dataStride * yoffset);
 428       for (i = 0; i < height; i++) {
 429          _vega_unpack_float_span_rgba(ctx, width, xoffset, src, dataFormat, temp);
 430          pipe_put_tile_rgba(pipe, transfer, x+image->x, y+image->y, width, 1, df);
 431          y += yStep;
 432          src += dataStride;
 433       }
 434       pipe->transfer_destroy(pipe, transfer);
 435    }
 436 }
 437
 438 void image_get_sub_data(struct vg_image * image,
 439                         void * data,
 440                         VGint dataStride,
 441                         VGImageFormat dataFormat,
 442                         VGint sx, VGint sy,
 443                         VGint width, VGint height)
 444 {
 445    struct vg_context *ctx = vg_current_context();
 446    struct pipe_context *pipe = ctx->pipe;
 447    VGfloat temp[VEGA_MAX_IMAGE_WIDTH][4];
 448    VGfloat *df = (VGfloat*)temp;
 449    VGint y = 0, yStep = 1;
 450    VGint i;
 451    VGubyte *dst = (VGubyte *)data;
 452
 453    {
 454       struct pipe_transfer *transfer =
 455          pipe_get_transfer(pipe,
 456                                   image->sampler_view->texture,  0, 0, 0,
 457                                   PIPE_TRANSFER_READ,
 458                                   0, 0,
 459                                   image->x + image->width,
 460                                   image->y + image->height);
 461       /* Do a row at a time to flip image data vertically */
 462       for (i = 0; i < height; i++) {
 463 #if 0
 464          debug_printf("%d-%d  == %d\n", sy, height, y);
 465 #endif
 466          pipe_get_tile_rgba(pipe, transfer, sx+image->x, y, width, 1, df);
 467          y += yStep;
 468          _vega_pack_rgba_span_float(ctx, width, temp, dataFormat, dst);
 469          dst += dataStride;
 470       }
 471
 472       pipe->transfer_destroy(pipe, transfer);
 473    }
 474 }
 475
 476 struct vg_image * image_child_image(struct vg_image *parent,
 477                                     VGint x, VGint y,
 478                                     VGint width, VGint height)
 479 {
 480    struct vg_context *ctx = vg_current_context();
 481    struct vg_image *image = CALLOC_STRUCT(vg_image);
 482
 483    vg_init_object(&image->base, ctx, VG_OBJECT_IMAGE);
 484
 485    image->x = parent->x + x;
 486    image->y = parent->y + y;
 487    image->width = width;
 488    image->height = height;
 489    image->parent = parent;
 490    image->sampler_view = NULL;
 491    pipe_sampler_view_reference(&image->sampler_view,
 492                                parent->sampler_view);
 493
 494    image->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 495    image->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 496    image->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 497    image->sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 498    image->sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 499    image->sampler.normalized_coords = 1;
 500
 501    if (!parent->children_array)
 502       parent->children_array = array_create(
 503          sizeof(struct vg_image*));
 504
 505    array_append_data(parent->children_array,
 506                      &image, 1);
 507
 508    vg_context_add_object(ctx, VG_OBJECT_IMAGE, image);
 509
 510    return image;
 511 }
 512
 513 void image_copy(struct vg_image *dst, VGint dx, VGint dy,
 514                 struct vg_image *src, VGint sx, VGint sy,
 515                 VGint width, VGint height,
 516                 VGboolean dither)
 517 {
 518    struct vg_context *ctx = vg_current_context();
 519
 520    if (width <= 0 || height <= 0) {
 521       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 522       return;
 523    }
 524    /* make sure rendering has completed */
 525    ctx->pipe->flush(ctx->pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 526    vg_copy_texture(ctx, dst->sampler_view->texture, dst->x + dx, dst->y + dy,
 527                    src->sampler_view, src->x + sx, src->y + sy, width, height);
 528 }
 529
 530 void image_draw(struct vg_image *img)
 531 {
 532    struct vg_context *ctx = vg_current_context();
 533    VGfloat x1, y1;
 534    VGfloat x2, y2;
 535    VGfloat x3, y3;
 536    VGfloat x4, y4;
 537    struct matrix *matrix;
 538
 539    x1 = 0;
 540    y1 = 0;
 541    x2 = img->width;
 542    y2 = 0;
 543    x3 = img->width;
 544    y3 = img->height;
 545    x4 = 0;
 546    y4 = img->height;
 547
 548    matrix = &ctx->state.vg.image_user_to_surface_matrix;
 549
 550    matrix_map_point(matrix, x1, y1, &x1, &y1);
 551    matrix_map_point(matrix, x2, y2, &x2, &y2);
 552    matrix_map_point(matrix, x3, y3, &x3, &y3);
 553    matrix_map_point(matrix, x4, y4, &x4, &y4);
 554
 555    shader_set_drawing_image(ctx->shader, VG_TRUE);
 556    shader_set_paint(ctx->shader, ctx->state.vg.fill_paint);
 557    shader_set_image(ctx->shader, img);
 558    shader_bind(ctx->shader);
 559
 560    renderer_texture_quad(ctx->renderer, image_texture(img),
 561                          img->x, img->y, img->x + img->width, img->y + img->height,
 562                          x1, y1, x2, y2, x3, y3, x4, y4);
 563 }
 564
 565 void image_set_pixels(VGint dx, VGint dy,
 566                       struct vg_image *src, VGint sx, VGint sy,
 567                       VGint width, VGint height)
 568 {
 569    struct vg_context *ctx = vg_current_context();
 570    struct pipe_context *pipe = ctx->pipe;
 571    struct pipe_screen *screen = pipe->screen;
 572    struct pipe_surface *surf;
 573    struct st_renderbuffer *strb = ctx->draw_buffer->strb;
 574
 575    /* make sure rendering has completed */
 576    pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 577
 578    surf = screen->get_tex_surface(screen, image_texture(src),  0, 0, 0,
 579                                   0 /* no bind flags as surf isn't actually used??? */);
 580
 581    vg_copy_surface(ctx, strb->surface, dx, dy,
 582                    surf, sx+src->x, sy+src->y, width, height);
 583
 584    screen->tex_surface_destroy(surf);
 585 }
 586
 587 void image_get_pixels(struct vg_image *dst, VGint dx, VGint dy,
 588                       VGint sx, VGint sy,
 589                       VGint width, VGint height)
 590 {
 591    struct vg_context *ctx = vg_current_context();
 592    struct pipe_context *pipe = ctx->pipe;
 593    struct pipe_screen *screen = pipe->screen;
 594    struct pipe_surface *surf;
 595    struct st_renderbuffer *strb = ctx->draw_buffer->strb;
 596
 597    /* flip the y coordinates */
 598    /*dy = dst->height - dy - height;*/
 599
 600    /* make sure rendering has completed */
 601    pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 602
 603    surf = screen->get_tex_surface(screen, image_texture(dst),  0, 0, 0,
 604                                   0 /* no bind flags as surf isn't actually used??? */);
 605
 606    vg_copy_surface(ctx, surf, dst->x + dx, dst->y + dy,
 607                    strb->surface, sx, sy, width, height);
 608
 609    pipe_surface_reference(&surf, NULL);
 610 }
 611
 612
 613 VGboolean vg_image_overlaps(struct vg_image *dst,
 614                             struct vg_image *src)
 615 {
 616    if (dst == src || dst->parent == src ||
 617        dst == src->parent)
 618       return VG_TRUE;
 619    if (dst->parent && dst->parent == src->parent) {
 620       VGfloat left1 = dst->x;
 621       VGfloat left2 = src->x;
 622       VGfloat right1 = dst->x + dst->width;
 623       VGfloat right2 = src->x + src->width;
 624       VGfloat bottom1 = dst->y;
 625       VGfloat bottom2 = src->y;
 626       VGfloat top1 = dst->y + dst->height;
 627       VGfloat top2 = src->y + src->height;
 628
 629       return !(left2 > right1 || right2 < left1 ||
 630                top2 > bottom1 || bottom2 < top1);
 631    }
 632    return VG_FALSE;
 633 }
 634
 635 VGint image_bind_samplers(struct vg_image *img, struct pipe_sampler_state **samplers,
 636                           struct pipe_sampler_view **sampler_views)
 637 {
 638    img->sampler.min_img_filter = image_sampler_filter(img->base.ctx);
 639    img->sampler.mag_img_filter = image_sampler_filter(img->base.ctx);
 640    samplers[3] = &img->sampler;
 641    sampler_views[3] = img->sampler_view;
 642    return 1;
 643 }
 644
 645 VGint image_sampler_filter(struct vg_context *ctx)
 646 {
 647     switch(ctx->state.vg.image_quality) {
 648     case VG_IMAGE_QUALITY_NONANTIALIASED:
 649        return PIPE_TEX_FILTER_NEAREST;
 650        break;
 651     case VG_IMAGE_QUALITY_FASTER:
 652        return PIPE_TEX_FILTER_NEAREST;
 653        break;
 654     case VG_IMAGE_QUALITY_BETTER:
 655        /* possibly use anisotropic filtering */
 656        return PIPE_TEX_FILTER_LINEAR;
 657        break;
 658     default:
 659        debug_printf("Unknown image quality");
 660     }
 661     return PIPE_TEX_FILTER_NEAREST;
 662 }