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 "shader.h"
  36
  37 #include "pipe/p_context.h"
  38 #include "pipe/p_screen.h"
  39 #include "util/u_inlines.h"
  40 #include "util/u_format.h"
  41 #include "util/u_tile.h"
  42 #include "util/u_memory.h"
  43 #include "util/u_math.h"
  44 #include "util/u_sampler.h"
  45
  46 static enum pipe_format vg_format_to_pipe(VGImageFormat format)
  47 {
  48    switch(format) {
  49    case VG_sRGB_565:
  50       return PIPE_FORMAT_B5G6R5_UNORM;
  51    case VG_sRGBA_5551:
  52       return PIPE_FORMAT_B5G5R5A1_UNORM;
  53    case VG_sRGBA_4444:
  54       return PIPE_FORMAT_B4G4R4A4_UNORM;
  55    case VG_sL_8:
  56    case VG_lL_8:
  57       return PIPE_FORMAT_L8_UNORM;
  58    case VG_BW_1:
  59       return PIPE_FORMAT_B8G8R8A8_UNORM;
  60    case VG_A_8:
  61       return PIPE_FORMAT_A8_UNORM;
  62 #ifdef OPENVG_VERSION_1_1
  63    case VG_A_1:
  64    case VG_A_4:
  65       return PIPE_FORMAT_A8_UNORM;
  66 #endif
  67    default:
  68       return PIPE_FORMAT_B8G8R8A8_UNORM;
  69    }
  70 }
  71
  72 static INLINE void vg_sync_size(VGfloat *src_loc, VGfloat *dst_loc)
  73 {
  74    src_loc[2] = MIN2(src_loc[2], dst_loc[2]);
  75    src_loc[3] = MIN2(src_loc[3], dst_loc[3]);
  76    dst_loc[2] = src_loc[2];
  77    dst_loc[3] = src_loc[3];
  78 }
  79
  80 static void vg_get_copy_coords(VGfloat *src_loc,
  81                                VGfloat src_width, VGfloat src_height,
  82                                VGfloat *dst_loc,
  83                                VGfloat dst_width, VGfloat dst_height)
  84 {
  85    VGfloat dst_bounds[4], src_bounds[4];
  86    VGfloat src_shift[4], dst_shift[4], shift[4];
  87
  88    dst_bounds[0] = 0.f;
  89    dst_bounds[1] = 0.f;
  90    dst_bounds[2] = dst_width;
  91    dst_bounds[3] = dst_height;
  92
  93    src_bounds[0] = 0.f;
  94    src_bounds[1] = 0.f;
  95    src_bounds[2] = src_width;
  96    src_bounds[3] = src_height;
  97
  98    vg_bound_rect(src_loc, src_bounds, src_shift);
  99    vg_bound_rect(dst_loc, dst_bounds, dst_shift);
 100    shift[0] = src_shift[0] - dst_shift[0];
 101    shift[1] = src_shift[1] - dst_shift[1];
 102
 103    if (shift[0] < 0)
 104       vg_shift_rectx(src_loc, src_bounds, -shift[0]);
 105    else
 106       vg_shift_rectx(dst_loc, dst_bounds, shift[0]);
 107
 108    if (shift[1] < 0)
 109       vg_shift_recty(src_loc, src_bounds, -shift[1]);
 110    else
 111       vg_shift_recty(dst_loc, dst_bounds, shift[1]);
 112
 113    vg_sync_size(src_loc, dst_loc);
 114 }
 115
 116 static void vg_copy_texture(struct vg_context *ctx,
 117                             struct pipe_resource *dst, VGint dx, VGint dy,
 118                             struct pipe_sampler_view *src, VGint sx, VGint sy,
 119                             VGint width, VGint height)
 120 {
 121    VGfloat dst_loc[4], src_loc[4];
 122
 123    dst_loc[0] = dx;
 124    dst_loc[1] = dy;
 125    dst_loc[2] = width;
 126    dst_loc[3] = height;
 127
 128    src_loc[0] = sx;
 129    src_loc[1] = sy;
 130    src_loc[2] = width;
 131    src_loc[3] = height;
 132
 133    vg_get_copy_coords(src_loc, src->texture->width0, src->texture->height0,
 134                       dst_loc, dst->width0, dst->height0);
 135
 136    if (src_loc[2] >= 0 && src_loc[3] >= 0 &&
 137        dst_loc[2] >= 0 && dst_loc[3] >= 0) {
 138       struct pipe_surface *surf;
 139
 140       /* get the destination surface */
 141       surf = ctx->pipe->screen->get_tex_surface(ctx->pipe->screen,
 142             dst, 0, 0, 0, PIPE_BIND_RENDER_TARGET);
 143       if (surf && renderer_copy_begin(ctx->renderer, surf, VG_TRUE, src)) {
 144          renderer_copy(ctx->renderer,
 145                dst_loc[0], dst_loc[1], dst_loc[2], dst_loc[3],
 146                src_loc[0], src_loc[1], src_loc[2], src_loc[3]);
 147          renderer_copy_end(ctx->renderer);
 148       }
 149
 150       pipe_surface_reference(&surf, NULL);
 151    }
 152 }
 153
 154 void vg_copy_surface(struct vg_context *ctx,
 155                      struct pipe_surface *dst, VGint dx, VGint dy,
 156                      struct pipe_surface *src, VGint sx, VGint sy,
 157                      VGint width, VGint height)
 158 {
 159    VGfloat dst_loc[4], src_loc[4];
 160
 161    dst_loc[0] = dx;
 162    dst_loc[1] = dy;
 163    dst_loc[2] = width;
 164    dst_loc[3] = height;
 165
 166    src_loc[0] = sx;
 167    src_loc[1] = sy;
 168    src_loc[2] = width;
 169    src_loc[3] = height;
 170
 171    vg_get_copy_coords(src_loc, src->width, src->height,
 172                       dst_loc, dst->width, dst->height);
 173
 174    if (src_loc[2] > 0 && src_loc[3] > 0 &&
 175        dst_loc[2] > 0 && dst_loc[3] > 0) {
 176       if (src == dst)
 177          renderer_copy_surface(ctx->renderer,
 178                                src,
 179                                src_loc[0],
 180                                src->height - (src_loc[1] + src_loc[3]),
 181                                src_loc[0] + src_loc[2],
 182                                src->height - src_loc[1],
 183                                dst,
 184                                dst_loc[0],
 185                                dst->height - (dst_loc[1] + dst_loc[3]),
 186                                dst_loc[0] + dst_loc[2],
 187                                dst->height - dst_loc[1],
 188                                0, 0);
 189       else
 190          renderer_copy_surface(ctx->renderer,
 191                                src,
 192                                src_loc[0],
 193                                src->height - src_loc[1],
 194                                src_loc[0] + src_loc[2],
 195                                src->height - (src_loc[1] + src_loc[3]),
 196                                dst,
 197                                dst_loc[0],
 198                                dst->height - (dst_loc[1] + dst_loc[3]),
 199                                dst_loc[0] + dst_loc[2],
 200                                dst->height - dst_loc[1],
 201                                0, 0);
 202    }
 203
 204 }
 205
 206 static struct pipe_resource *image_texture(struct vg_image *img)
 207 {
 208    struct pipe_resource *tex = img->sampler_view->texture;
 209    return tex;
 210 }
 211
 212
 213 static void image_cleari(struct vg_image *img, VGint clear_colori,
 214                          VGint x, VGint y, VGint width, VGint height)
 215 {
 216    VGint *clearbuf;
 217    VGint i;
 218    VGfloat dwidth, dheight;
 219
 220    clearbuf = malloc(sizeof(VGint)*width*height);
 221    for (i = 0; i < width*height; ++i)
 222       clearbuf[i] = clear_colori;
 223
 224    dwidth = MIN2(width, img->width);
 225    dheight = MIN2(height, img->height);
 226
 227    image_sub_data(img, clearbuf, width * sizeof(VGint),
 228                   VG_sRGBA_8888,
 229                   x, y, dwidth, dheight);
 230    free(clearbuf);
 231 }
 232
 233 struct vg_image * image_create(VGImageFormat format,
 234                                VGint width, VGint height)
 235 {
 236    struct vg_context *ctx = vg_current_context();
 237    struct pipe_context *pipe = ctx->pipe;
 238    struct vg_image *image = CALLOC_STRUCT(vg_image);
 239    enum pipe_format pformat = vg_format_to_pipe(format);
 240    struct pipe_resource pt, *newtex;
 241    struct pipe_sampler_view view_templ;
 242    struct pipe_sampler_view *view;
 243    struct pipe_screen *screen = ctx->pipe->screen;
 244
 245    vg_init_object(&image->base, ctx, VG_OBJECT_IMAGE);
 246
 247    image->format = format;
 248    image->width = width;
 249    image->height = height;
 250
 251    image->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 252    image->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 253    image->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 254    image->sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 255    image->sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 256    image->sampler.normalized_coords = 1;
 257
 258    assert(screen->is_format_supported(screen, pformat, PIPE_TEXTURE_2D,
 259                                       0, PIPE_BIND_SAMPLER_VIEW, 0));
 260
 261    memset(&pt, 0, sizeof(pt));
 262    pt.target = PIPE_TEXTURE_2D;
 263    pt.format = pformat;
 264    pt.last_level = 0;
 265    pt.width0 = width;
 266    pt.height0 = height;
 267    pt.depth0 = 1;
 268    pt.bind = PIPE_BIND_SAMPLER_VIEW;
 269
 270    newtex = screen->resource_create(screen, &pt);
 271
 272    debug_assert(newtex);
 273
 274    u_sampler_view_default_template(&view_templ, newtex, newtex->format);
 275    /* R, G, and B are treated as 1.0 for alpha-only formats in OpenVG */
 276    if (newtex->format == PIPE_FORMAT_A8_UNORM) {
 277       view_templ.swizzle_r = PIPE_SWIZZLE_ONE;
 278       view_templ.swizzle_g = PIPE_SWIZZLE_ONE;
 279       view_templ.swizzle_b = PIPE_SWIZZLE_ONE;
 280    }
 281
 282    view = pipe->create_sampler_view(pipe, newtex, &view_templ);
 283    /* want the texture to go away if the view is freed */
 284    pipe_resource_reference(&newtex, NULL);
 285
 286    image->sampler_view = view;
 287
 288    vg_context_add_object(ctx, VG_OBJECT_IMAGE, image);
 289
 290    image_cleari(image, 0, 0, 0, image->width, image->height);
 291    return image;
 292 }
 293
 294 void image_destroy(struct vg_image *img)
 295 {
 296    struct vg_context *ctx = vg_current_context();
 297    vg_context_remove_object(ctx, VG_OBJECT_IMAGE, img);
 298
 299
 300    if (img->parent) {
 301       /* remove img from the parent child array */
 302       int idx;
 303       struct vg_image **array =
 304          (struct vg_image **)img->parent->children_array->data;
 305
 306       for (idx = 0; idx < img->parent->children_array->num_elements; ++idx) {
 307          struct vg_image *child = array[idx];
 308          if (child == img) {
 309             break;
 310          }
 311       }
 312       debug_assert(idx < img->parent->children_array->num_elements);
 313       array_remove_element(img->parent->children_array, idx);
 314    }
 315
 316    if (img->children_array && img->children_array->num_elements) {
 317       /* reparent the children */
 318       VGint i;
 319       struct vg_image *parent = img->parent;
 320       struct vg_image **children =
 321          (struct vg_image **)img->children_array->data;
 322       if (!parent) {
 323          VGint min_x = children[0]->x;
 324          parent = children[0];
 325
 326          for (i = 1; i < img->children_array->num_elements; ++i) {
 327             struct vg_image *child = children[i];
 328             if (child->x < min_x) {
 329                parent = child;
 330             }
 331          }
 332       }
 333
 334       for (i = 0; i < img->children_array->num_elements; ++i) {
 335          struct vg_image *child = children[i];
 336          if (child != parent) {
 337             child->parent = parent;
 338             if (!parent->children_array) {
 339                parent->children_array = array_create(
 340                   sizeof(struct vg_image*));
 341             }
 342             array_append_data(parent->children_array,
 343                               &child, 1);
 344          } else
 345             child->parent = NULL;
 346       }
 347       array_destroy(img->children_array);
 348    }
 349
 350    pipe_sampler_view_reference(&img->sampler_view, NULL);
 351    FREE(img);
 352 }
 353
 354 void image_clear(struct vg_image *img,
 355                  VGint x, VGint y, VGint width, VGint height)
 356 {
 357    struct vg_context *ctx = vg_current_context();
 358    VGfloat *clear_colorf = ctx->state.vg.clear_color;
 359    VGubyte r, g, b ,a;
 360    VGint clear_colori;
 361    /* FIXME: this is very nasty */
 362    r = float_to_ubyte(clear_colorf[0]);
 363    g = float_to_ubyte(clear_colorf[1]);
 364    b = float_to_ubyte(clear_colorf[2]);
 365    a = float_to_ubyte(clear_colorf[3]);
 366    clear_colori = r << 24 | g << 16 | b << 8 | a;
 367    image_cleari(img, clear_colori, x, y, width, height);
 368 }
 369
 370 void image_sub_data(struct vg_image *image,
 371                     const void * data,
 372                     VGint dataStride,
 373                     VGImageFormat dataFormat,
 374                     VGint x, VGint y,
 375                     VGint width, VGint height)
 376 {
 377    const VGint yStep = 1;
 378    VGubyte *src = (VGubyte *)data;
 379    VGfloat temp[VEGA_MAX_IMAGE_WIDTH][4];
 380    VGfloat *df = (VGfloat*)temp;
 381    VGint i;
 382    struct vg_context *ctx = vg_current_context();
 383    struct pipe_context *pipe = ctx->pipe;
 384    struct pipe_resource *texture = image_texture(image);
 385    VGint xoffset = 0, yoffset = 0;
 386
 387    if (x < 0) {
 388       xoffset -= x;
 389       width += x;
 390       x = 0;
 391    }
 392    if (y < 0) {
 393       yoffset -= y;
 394       height += y;
 395       y = 0;
 396    }
 397
 398    if (width <= 0 || height <= 0) {
 399       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 400       return;
 401    }
 402
 403    if (x > image->width || y > image->width) {
 404       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 405       return;
 406    }
 407
 408    if (x + width > image->width) {
 409       width = image->width - x;
 410    }
 411
 412    if (y + height > image->height) {
 413       height = image->height - y;
 414    }
 415
 416    { /* upload color_data */
 417       struct pipe_transfer *transfer = pipe_get_transfer(
 418          pipe, texture, 0, 0, 0,
 419          PIPE_TRANSFER_WRITE, 0, 0, texture->width0, texture->height0);
 420       src += (dataStride * yoffset);
 421       for (i = 0; i < height; i++) {
 422          _vega_unpack_float_span_rgba(ctx, width, xoffset, src, dataFormat, temp);
 423          pipe_put_tile_rgba(pipe, transfer, x+image->x, y+image->y, width, 1, df);
 424          y += yStep;
 425          src += dataStride;
 426       }
 427       pipe->transfer_destroy(pipe, transfer);
 428    }
 429 }
 430
 431 void image_get_sub_data(struct vg_image * image,
 432                         void * data,
 433                         VGint dataStride,
 434                         VGImageFormat dataFormat,
 435                         VGint sx, VGint sy,
 436                         VGint width, VGint height)
 437 {
 438    struct vg_context *ctx = vg_current_context();
 439    struct pipe_context *pipe = ctx->pipe;
 440    VGfloat temp[VEGA_MAX_IMAGE_WIDTH][4];
 441    VGfloat *df = (VGfloat*)temp;
 442    VGint y = 0, yStep = 1;
 443    VGint i;
 444    VGubyte *dst = (VGubyte *)data;
 445
 446    {
 447       struct pipe_transfer *transfer =
 448          pipe_get_transfer(pipe,
 449                                   image->sampler_view->texture,  0, 0, 0,
 450                                   PIPE_TRANSFER_READ,
 451                                   0, 0,
 452                                   image->x + image->width,
 453                                   image->y + image->height);
 454       /* Do a row at a time to flip image data vertically */
 455       for (i = 0; i < height; i++) {
 456 #if 0
 457          debug_printf("%d-%d  == %d\n", sy, height, y);
 458 #endif
 459          pipe_get_tile_rgba(pipe, transfer, sx+image->x, y, width, 1, df);
 460          y += yStep;
 461          _vega_pack_rgba_span_float(ctx, width, temp, dataFormat, dst);
 462          dst += dataStride;
 463       }
 464
 465       pipe->transfer_destroy(pipe, transfer);
 466    }
 467 }
 468
 469 struct vg_image * image_child_image(struct vg_image *parent,
 470                                     VGint x, VGint y,
 471                                     VGint width, VGint height)
 472 {
 473    struct vg_context *ctx = vg_current_context();
 474    struct vg_image *image = CALLOC_STRUCT(vg_image);
 475
 476    vg_init_object(&image->base, ctx, VG_OBJECT_IMAGE);
 477
 478    image->x = parent->x + x;
 479    image->y = parent->y + y;
 480    image->width = width;
 481    image->height = height;
 482    image->parent = parent;
 483    image->sampler_view = NULL;
 484    pipe_sampler_view_reference(&image->sampler_view,
 485                                parent->sampler_view);
 486
 487    image->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 488    image->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 489    image->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 490    image->sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 491    image->sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 492    image->sampler.normalized_coords = 1;
 493
 494    if (!parent->children_array)
 495       parent->children_array = array_create(
 496          sizeof(struct vg_image*));
 497
 498    array_append_data(parent->children_array,
 499                      &image, 1);
 500
 501    vg_context_add_object(ctx, VG_OBJECT_IMAGE, image);
 502
 503    return image;
 504 }
 505
 506 void image_copy(struct vg_image *dst, VGint dx, VGint dy,
 507                 struct vg_image *src, VGint sx, VGint sy,
 508                 VGint width, VGint height,
 509                 VGboolean dither)
 510 {
 511    struct vg_context *ctx = vg_current_context();
 512
 513    if (width <= 0 || height <= 0) {
 514       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 515       return;
 516    }
 517    /* make sure rendering has completed */
 518    ctx->pipe->flush(ctx->pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 519    vg_copy_texture(ctx, dst->sampler_view->texture, dst->x + dx, dst->y + dy,
 520                    src->sampler_view, src->x + sx, src->y + sy, width, height);
 521 }
 522
 523 void image_draw(struct vg_image *img, struct matrix *matrix)
 524 {
 525    struct vg_context *ctx = vg_current_context();
 526    struct matrix paint_matrix;
 527    VGfloat x1, y1;
 528    VGfloat x2, y2;
 529    VGfloat x3, y3;
 530    VGfloat x4, y4;
 531
 532    if (!vg_get_paint_matrix(ctx,
 533                             &ctx->state.vg.fill_paint_to_user_matrix,
 534                             matrix,
 535                             &paint_matrix))
 536       return;
 537
 538    x1 = 0;
 539    y1 = 0;
 540    x2 = img->width;
 541    y2 = 0;
 542    x3 = img->width;
 543    y3 = img->height;
 544    x4 = 0;
 545    y4 = img->height;
 546
 547    matrix_map_point(matrix, x1, y1, &x1, &y1);
 548    matrix_map_point(matrix, x2, y2, &x2, &y2);
 549    matrix_map_point(matrix, x3, y3, &x3, &y3);
 550    matrix_map_point(matrix, x4, y4, &x4, &y4);
 551
 552    shader_set_drawing_image(ctx->shader, VG_TRUE);
 553    shader_set_paint(ctx->shader, ctx->state.vg.fill_paint);
 554    shader_set_paint_matrix(ctx->shader, &paint_matrix);
 555    shader_set_image(ctx->shader, img);
 556    shader_bind(ctx->shader);
 557
 558    renderer_texture_quad(ctx->renderer, image_texture(img),
 559                          img->x, img->y, img->x + img->width, img->y + img->height,
 560                          x1, y1, x2, y2, x3, y3, x4, y4);
 561 }
 562
 563 void image_set_pixels(VGint dx, VGint dy,
 564                       struct vg_image *src, VGint sx, VGint sy,
 565                       VGint width, VGint height)
 566 {
 567    struct vg_context *ctx = vg_current_context();
 568    struct pipe_context *pipe = ctx->pipe;
 569    struct pipe_screen *screen = pipe->screen;
 570    struct pipe_surface *surf;
 571    struct st_renderbuffer *strb = ctx->draw_buffer->strb;
 572
 573    /* make sure rendering has completed */
 574    pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 575
 576    surf = screen->get_tex_surface(screen, image_texture(src),  0, 0, 0,
 577                                   0 /* no bind flags as surf isn't actually used??? */);
 578
 579    vg_copy_surface(ctx, strb->surface, dx, dy,
 580                    surf, sx+src->x, sy+src->y, width, height);
 581
 582    screen->tex_surface_destroy(surf);
 583 }
 584
 585 void image_get_pixels(struct vg_image *dst, VGint dx, VGint dy,
 586                       VGint sx, VGint sy,
 587                       VGint width, VGint height)
 588 {
 589    struct vg_context *ctx = vg_current_context();
 590    struct pipe_context *pipe = ctx->pipe;
 591    struct pipe_screen *screen = pipe->screen;
 592    struct pipe_surface *surf;
 593    struct st_renderbuffer *strb = ctx->draw_buffer->strb;
 594
 595    /* flip the y coordinates */
 596    /*dy = dst->height - dy - height;*/
 597
 598    /* make sure rendering has completed */
 599    pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 600
 601    surf = screen->get_tex_surface(screen, image_texture(dst),  0, 0, 0,
 602                                   0 /* no bind flags as surf isn't actually used??? */);
 603
 604    vg_copy_surface(ctx, surf, dst->x + dx, dst->y + dy,
 605                    strb->surface, sx, sy, width, height);
 606
 607    pipe_surface_reference(&surf, NULL);
 608 }
 609
 610
 611 VGboolean vg_image_overlaps(struct vg_image *dst,
 612                             struct vg_image *src)
 613 {
 614    if (dst == src || dst->parent == src ||
 615        dst == src->parent)
 616       return VG_TRUE;
 617    if (dst->parent && dst->parent == src->parent) {
 618       VGfloat left1 = dst->x;
 619       VGfloat left2 = src->x;
 620       VGfloat right1 = dst->x + dst->width;
 621       VGfloat right2 = src->x + src->width;
 622       VGfloat bottom1 = dst->y;
 623       VGfloat bottom2 = src->y;
 624       VGfloat top1 = dst->y + dst->height;
 625       VGfloat top2 = src->y + src->height;
 626
 627       return !(left2 > right1 || right2 < left1 ||
 628                top2 > bottom1 || bottom2 < top1);
 629    }
 630    return VG_FALSE;
 631 }
 632
 633 VGint image_bind_samplers(struct vg_image *img, struct pipe_sampler_state **samplers,
 634                           struct pipe_sampler_view **sampler_views)
 635 {
 636    img->sampler.min_img_filter = image_sampler_filter(img->base.ctx);
 637    img->sampler.mag_img_filter = image_sampler_filter(img->base.ctx);
 638    samplers[3] = &img->sampler;
 639    sampler_views[3] = img->sampler_view;
 640    return 1;
 641 }
 642
 643 VGint image_sampler_filter(struct vg_context *ctx)
 644 {
 645     switch(ctx->state.vg.image_quality) {
 646     case VG_IMAGE_QUALITY_NONANTIALIASED:
 647        return PIPE_TEX_FILTER_NEAREST;
 648        break;
 649     case VG_IMAGE_QUALITY_FASTER:
 650        return PIPE_TEX_FILTER_NEAREST;
 651        break;
 652     case VG_IMAGE_QUALITY_BETTER:
 653        /* possibly use anisotropic filtering */
 654        return PIPE_TEX_FILTER_LINEAR;
 655        break;
 656     default:
 657        debug_printf("Unknown image quality");
 658     }
 659     return PIPE_TEX_FILTER_NEAREST;
 660 }