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
  81 static void vg_copy_texture(struct vg_context *ctx,
  82                             struct pipe_resource *dst, VGint dx, VGint dy,
  83                             struct pipe_sampler_view *src, VGint sx, VGint sy,
  84                             VGint width, VGint height)
  85 {
  86    VGfloat dst_loc[4], src_loc[4];
  87    VGfloat dst_bounds[4], src_bounds[4];
  88    VGfloat src_shift[4], dst_shift[4], shift[4];
  89
  90    dst_loc[0] = dx;
  91    dst_loc[1] = dy;
  92    dst_loc[2] = width;
  93    dst_loc[3] = height;
  94    dst_bounds[0] = 0.f;
  95    dst_bounds[1] = 0.f;
  96    dst_bounds[2] = dst->width0;
  97    dst_bounds[3] = dst->height0;
  98
  99    src_loc[0] = sx;
 100    src_loc[1] = sy;
 101    src_loc[2] = width;
 102    src_loc[3] = height;
 103    src_bounds[0] = 0.f;
 104    src_bounds[1] = 0.f;
 105    src_bounds[2] = src->texture->width0;
 106    src_bounds[3] = src->texture->height0;
 107
 108    vg_bound_rect(src_loc, src_bounds, src_shift);
 109    vg_bound_rect(dst_loc, dst_bounds, dst_shift);
 110    shift[0] = src_shift[0] - dst_shift[0];
 111    shift[1] = src_shift[1] - dst_shift[1];
 112
 113    if (shift[0] < 0)
 114       vg_shift_rectx(src_loc, src_bounds, -shift[0]);
 115    else
 116       vg_shift_rectx(dst_loc, dst_bounds, shift[0]);
 117
 118    if (shift[1] < 0)
 119       vg_shift_recty(src_loc, src_bounds, -shift[1]);
 120    else
 121       vg_shift_recty(dst_loc, dst_bounds, shift[1]);
 122
 123    vg_sync_size(src_loc, dst_loc);
 124
 125    if (src_loc[2] >= 0 && src_loc[3] >= 0 &&
 126        dst_loc[2] >= 0 && dst_loc[3] >= 0) {
 127       renderer_copy_texture(ctx->renderer,
 128                             src,
 129                             src_loc[0],
 130                             src_loc[1] + src_loc[3],
 131                             src_loc[0] + src_loc[2],
 132                             src_loc[1],
 133                             dst,
 134                             dst_loc[0],
 135                             dst_loc[1] + dst_loc[3],
 136                             dst_loc[0] + dst_loc[2],
 137                             dst_loc[1]);
 138    }
 139
 140 }
 141
 142 void vg_copy_surface(struct vg_context *ctx,
 143                      struct pipe_surface *dst, VGint dx, VGint dy,
 144                      struct pipe_surface *src, VGint sx, VGint sy,
 145                      VGint width, VGint height)
 146 {
 147    VGfloat dst_loc[4], src_loc[4];
 148    VGfloat dst_bounds[4], src_bounds[4];
 149    VGfloat src_shift[4], dst_shift[4], shift[4];
 150
 151    dst_loc[0] = dx;
 152    dst_loc[1] = dy;
 153    dst_loc[2] = width;
 154    dst_loc[3] = height;
 155    dst_bounds[0] = 0.f;
 156    dst_bounds[1] = 0.f;
 157    dst_bounds[2] = dst->width;
 158    dst_bounds[3] = dst->height;
 159
 160    src_loc[0] = sx;
 161    src_loc[1] = sy;
 162    src_loc[2] = width;
 163    src_loc[3] = height;
 164    src_bounds[0] = 0.f;
 165    src_bounds[1] = 0.f;
 166    src_bounds[2] = src->width;
 167    src_bounds[3] = src->height;
 168
 169    vg_bound_rect(src_loc, src_bounds, src_shift);
 170    vg_bound_rect(dst_loc, dst_bounds, dst_shift);
 171    shift[0] = src_shift[0] - dst_shift[0];
 172    shift[1] = src_shift[1] - dst_shift[1];
 173
 174    if (shift[0] < 0)
 175       vg_shift_rectx(src_loc, src_bounds, -shift[0]);
 176    else
 177       vg_shift_rectx(dst_loc, dst_bounds, shift[0]);
 178
 179    if (shift[1] < 0)
 180       vg_shift_recty(src_loc, src_bounds, -shift[1]);
 181    else
 182       vg_shift_recty(dst_loc, dst_bounds, shift[1]);
 183
 184    vg_sync_size(src_loc, dst_loc);
 185
 186    if (src_loc[2] > 0 && src_loc[3] > 0 &&
 187        dst_loc[2] > 0 && dst_loc[3] > 0) {
 188       if (src == dst)
 189          renderer_copy_surface(ctx->renderer,
 190                                src,
 191                                src_loc[0],
 192                                src->height - (src_loc[1] + src_loc[3]),
 193                                src_loc[0] + src_loc[2],
 194                                src->height - src_loc[1],
 195                                dst,
 196                                dst_loc[0],
 197                                dst->height - (dst_loc[1] + dst_loc[3]),
 198                                dst_loc[0] + dst_loc[2],
 199                                dst->height - dst_loc[1],
 200                                0, 0);
 201       else
 202          renderer_copy_surface(ctx->renderer,
 203                                src,
 204                                src_loc[0],
 205                                src->height - src_loc[1],
 206                                src_loc[0] + src_loc[2],
 207                                src->height - (src_loc[1] + src_loc[3]),
 208                                dst,
 209                                dst_loc[0],
 210                                dst->height - (dst_loc[1] + dst_loc[3]),
 211                                dst_loc[0] + dst_loc[2],
 212                                dst->height - dst_loc[1],
 213                                0, 0);
 214    }
 215
 216 }
 217
 218 static struct pipe_resource *image_texture(struct vg_image *img)
 219 {
 220    struct pipe_resource *tex = img->sampler_view->texture;
 221    return tex;
 222 }
 223
 224
 225 static void image_cleari(struct vg_image *img, VGint clear_colori,
 226                          VGint x, VGint y, VGint width, VGint height)
 227 {
 228    VGint *clearbuf;
 229    VGint i;
 230    VGfloat dwidth, dheight;
 231
 232    clearbuf = malloc(sizeof(VGint)*width*height);
 233    for (i = 0; i < width*height; ++i)
 234       clearbuf[i] = clear_colori;
 235
 236    dwidth = MIN2(width, img->width);
 237    dheight = MIN2(height, img->height);
 238
 239    image_sub_data(img, clearbuf, width * sizeof(VGint),
 240                   VG_sRGBA_8888,
 241                   x, y, dwidth, dheight);
 242    free(clearbuf);
 243 }
 244
 245 struct vg_image * image_create(VGImageFormat format,
 246                                VGint width, VGint height)
 247 {
 248    struct vg_context *ctx = vg_current_context();
 249    struct pipe_context *pipe = ctx->pipe;
 250    struct vg_image *image = CALLOC_STRUCT(vg_image);
 251    enum pipe_format pformat = vg_format_to_pipe(format);
 252    struct pipe_resource pt, *newtex;
 253    struct pipe_sampler_view view_templ;
 254    struct pipe_sampler_view *view;
 255    struct pipe_screen *screen = ctx->pipe->screen;
 256
 257    vg_init_object(&image->base, ctx, VG_OBJECT_IMAGE);
 258
 259    image->format = format;
 260    image->width = width;
 261    image->height = height;
 262
 263    image->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 264    image->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 265    image->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 266    image->sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 267    image->sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 268    image->sampler.normalized_coords = 1;
 269
 270    assert(screen->is_format_supported(screen, pformat, PIPE_TEXTURE_2D,
 271                                       0, PIPE_BIND_SAMPLER_VIEW, 0));
 272
 273    memset(&pt, 0, sizeof(pt));
 274    pt.target = PIPE_TEXTURE_2D;
 275    pt.format = pformat;
 276    pt.last_level = 0;
 277    pt.width0 = width;
 278    pt.height0 = height;
 279    pt.depth0 = 1;
 280    pt.bind = PIPE_BIND_SAMPLER_VIEW;
 281
 282    newtex = screen->resource_create(screen, &pt);
 283
 284    debug_assert(newtex);
 285
 286    u_sampler_view_default_template(&view_templ, newtex, newtex->format);
 287    view = pipe->create_sampler_view(pipe, newtex, &view_templ);
 288    /* want the texture to go away if the view is freed */
 289    pipe_resource_reference(&newtex, NULL);
 290
 291    image->sampler_view = view;
 292
 293    vg_context_add_object(ctx, VG_OBJECT_IMAGE, image);
 294
 295    image_cleari(image, 0, 0, 0, image->width, image->height);
 296    return image;
 297 }
 298
 299 void image_destroy(struct vg_image *img)
 300 {
 301    struct vg_context *ctx = vg_current_context();
 302    vg_context_remove_object(ctx, VG_OBJECT_IMAGE, img);
 303
 304
 305    if (img->parent) {
 306       /* remove img from the parent child array */
 307       int idx;
 308       struct vg_image **array =
 309          (struct vg_image **)img->parent->children_array->data;
 310
 311       for (idx = 0; idx < img->parent->children_array->num_elements; ++idx) {
 312          struct vg_image *child = array[idx];
 313          if (child == img) {
 314             break;
 315          }
 316       }
 317       debug_assert(idx < img->parent->children_array->num_elements);
 318       array_remove_element(img->parent->children_array, idx);
 319    }
 320
 321    if (img->children_array && img->children_array->num_elements) {
 322       /* reparent the children */
 323       VGint i;
 324       struct vg_image *parent = img->parent;
 325       struct vg_image **children =
 326          (struct vg_image **)img->children_array->data;
 327       if (!parent) {
 328          VGint min_x = children[0]->x;
 329          parent = children[0];
 330
 331          for (i = 1; i < img->children_array->num_elements; ++i) {
 332             struct vg_image *child = children[i];
 333             if (child->x < min_x) {
 334                parent = child;
 335             }
 336          }
 337       }
 338
 339       for (i = 0; i < img->children_array->num_elements; ++i) {
 340          struct vg_image *child = children[i];
 341          if (child != parent) {
 342             child->parent = parent;
 343             if (!parent->children_array) {
 344                parent->children_array = array_create(
 345                   sizeof(struct vg_image*));
 346             }
 347             array_append_data(parent->children_array,
 348                               &child, 1);
 349          } else
 350             child->parent = NULL;
 351       }
 352       array_destroy(img->children_array);
 353    }
 354
 355    pipe_sampler_view_reference(&img->sampler_view, NULL);
 356    FREE(img);
 357 }
 358
 359 void image_clear(struct vg_image *img,
 360                  VGint x, VGint y, VGint width, VGint height)
 361 {
 362    struct vg_context *ctx = vg_current_context();
 363    VGfloat *clear_colorf = ctx->state.vg.clear_color;
 364    VGubyte r, g, b ,a;
 365    VGint clear_colori;
 366    /* FIXME: this is very nasty */
 367    r = float_to_ubyte(clear_colorf[0]);
 368    g = float_to_ubyte(clear_colorf[1]);
 369    b = float_to_ubyte(clear_colorf[2]);
 370    a = float_to_ubyte(clear_colorf[3]);
 371    clear_colori = r << 24 | g << 16 | b << 8 | a;
 372    image_cleari(img, clear_colori, x, y, width, height);
 373 }
 374
 375 void image_sub_data(struct vg_image *image,
 376                     const void * data,
 377                     VGint dataStride,
 378                     VGImageFormat dataFormat,
 379                     VGint x, VGint y,
 380                     VGint width, VGint height)
 381 {
 382    const VGint yStep = 1;
 383    VGubyte *src = (VGubyte *)data;
 384    VGfloat temp[VEGA_MAX_IMAGE_WIDTH][4];
 385    VGfloat *df = (VGfloat*)temp;
 386    VGint i;
 387    struct vg_context *ctx = vg_current_context();
 388    struct pipe_context *pipe = ctx->pipe;
 389    struct pipe_resource *texture = image_texture(image);
 390    VGint xoffset = 0, yoffset = 0;
 391
 392    if (x < 0) {
 393       xoffset -= x;
 394       width += x;
 395       x = 0;
 396    }
 397    if (y < 0) {
 398       yoffset -= y;
 399       height += y;
 400       y = 0;
 401    }
 402
 403    if (width <= 0 || height <= 0) {
 404       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 405       return;
 406    }
 407
 408    if (x > image->width || y > image->width) {
 409       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 410       return;
 411    }
 412
 413    if (x + width > image->width) {
 414       width = image->width - x;
 415    }
 416
 417    if (y + height > image->height) {
 418       height = image->height - y;
 419    }
 420
 421    { /* upload color_data */
 422       struct pipe_transfer *transfer = pipe_get_transfer(
 423          pipe, texture, 0, 0, 0,
 424          PIPE_TRANSFER_WRITE, 0, 0, texture->width0, texture->height0);
 425       src += (dataStride * yoffset);
 426       for (i = 0; i < height; i++) {
 427          _vega_unpack_float_span_rgba(ctx, width, xoffset, src, dataFormat, temp);
 428          pipe_put_tile_rgba(pipe, transfer, x+image->x, y+image->y, width, 1, df);
 429          y += yStep;
 430          src += dataStride;
 431       }
 432       pipe->transfer_destroy(pipe, transfer);
 433    }
 434 }
 435
 436 void image_get_sub_data(struct vg_image * image,
 437                         void * data,
 438                         VGint dataStride,
 439                         VGImageFormat dataFormat,
 440                         VGint sx, VGint sy,
 441                         VGint width, VGint height)
 442 {
 443    struct vg_context *ctx = vg_current_context();
 444    struct pipe_context *pipe = ctx->pipe;
 445    VGfloat temp[VEGA_MAX_IMAGE_WIDTH][4];
 446    VGfloat *df = (VGfloat*)temp;
 447    VGint y = 0, yStep = 1;
 448    VGint i;
 449    VGubyte *dst = (VGubyte *)data;
 450
 451    {
 452       struct pipe_transfer *transfer =
 453          pipe_get_transfer(pipe,
 454                                   image->sampler_view->texture,  0, 0, 0,
 455                                   PIPE_TRANSFER_READ,
 456                                   0, 0,
 457                                   image->x + image->width,
 458                                   image->y + image->height);
 459       /* Do a row at a time to flip image data vertically */
 460       for (i = 0; i < height; i++) {
 461 #if 0
 462          debug_printf("%d-%d  == %d\n", sy, height, y);
 463 #endif
 464          pipe_get_tile_rgba(pipe, transfer, sx+image->x, y, width, 1, df);
 465          y += yStep;
 466          _vega_pack_rgba_span_float(ctx, width, temp, dataFormat, dst);
 467          dst += dataStride;
 468       }
 469
 470       pipe->transfer_destroy(pipe, transfer);
 471    }
 472 }
 473
 474 struct vg_image * image_child_image(struct vg_image *parent,
 475                                     VGint x, VGint y,
 476                                     VGint width, VGint height)
 477 {
 478    struct vg_context *ctx = vg_current_context();
 479    struct vg_image *image = CALLOC_STRUCT(vg_image);
 480
 481    vg_init_object(&image->base, ctx, VG_OBJECT_IMAGE);
 482
 483    image->x = parent->x + x;
 484    image->y = parent->y + y;
 485    image->width = width;
 486    image->height = height;
 487    image->parent = parent;
 488    image->sampler_view = NULL;
 489    pipe_sampler_view_reference(&image->sampler_view,
 490                                parent->sampler_view);
 491
 492    image->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 493    image->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 494    image->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 495    image->sampler.min_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 496    image->sampler.mag_img_filter = PIPE_TEX_MIPFILTER_NEAREST;
 497    image->sampler.normalized_coords = 1;
 498
 499    if (!parent->children_array)
 500       parent->children_array = array_create(
 501          sizeof(struct vg_image*));
 502
 503    array_append_data(parent->children_array,
 504                      &image, 1);
 505
 506    vg_context_add_object(ctx, VG_OBJECT_IMAGE, image);
 507
 508    return image;
 509 }
 510
 511 void image_copy(struct vg_image *dst, VGint dx, VGint dy,
 512                 struct vg_image *src, VGint sx, VGint sy,
 513                 VGint width, VGint height,
 514                 VGboolean dither)
 515 {
 516    struct vg_context *ctx = vg_current_context();
 517
 518    if (width <= 0 || height <= 0) {
 519       vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
 520       return;
 521    }
 522    /* make sure rendering has completed */
 523    ctx->pipe->flush(ctx->pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 524    vg_copy_texture(ctx, dst->sampler_view->texture, dst->x + dx, dst->y + dy,
 525                    src->sampler_view, src->x + sx, src->y + sy, width, height);
 526 }
 527
 528 void image_draw(struct vg_image *img)
 529 {
 530    struct vg_context *ctx = vg_current_context();
 531    VGfloat x1, y1;
 532    VGfloat x2, y2;
 533    VGfloat x3, y3;
 534    VGfloat x4, y4;
 535    struct matrix *matrix;
 536
 537    x1 = 0;
 538    y1 = 0;
 539    x2 = img->width;
 540    y2 = 0;
 541    x3 = img->width;
 542    y3 = img->height;
 543    x4 = 0;
 544    y4 = img->height;
 545
 546    matrix = &ctx->state.vg.image_user_to_surface_matrix;
 547
 548    matrix_map_point(matrix, x1, y1, &x1, &y1);
 549    matrix_map_point(matrix, x2, y2, &x2, &y2);
 550    matrix_map_point(matrix, x3, y3, &x3, &y3);
 551    matrix_map_point(matrix, x4, y4, &x4, &y4);
 552
 553    shader_set_drawing_image(ctx->shader, VG_TRUE);
 554    shader_set_paint(ctx->shader, ctx->state.vg.fill_paint);
 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 }