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