src/gallium/auxiliary/vl/vl_deint_filter.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2013 Grigori Goronzy <greg@chown.ath.cx>.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /*
  29  *  References:
  30  *
  31  *  Lin, S. F., Chang, Y. L., & Chen, L. G. (2003).
  32  *  Motion adaptive interpolation with horizontal motion detection for deinterlacing.
  33  *  Consumer Electronics, IEEE Transactions on, 49(4), 1256-1265.
  34  *
  35  *  Pei-Yin, C. H. E. N., & Yao-Hsien, L. A. I. (2007).
  36  *  A low-complexity interpolation method for deinterlacing.
  37  *  IEICE transactions on information and systems, 90(2), 606-608.
  38  *
  39  */
  40
  41 #include <stdio.h>
  42
  43 #include "pipe/p_context.h"
  44
  45 #include "tgsi/tgsi_ureg.h"
  46
  47 #include "util/u_draw.h"
  48 #include "util/u_memory.h"
  49 #include "util/u_math.h"
  50
  51 #include "vl_types.h"
  52 #include "vl_video_buffer.h"
  53 #include "vl_vertex_buffers.h"
  54 #include "vl_deint_filter.h"
  55
  56 enum VS_OUTPUT
  57 {
  58    VS_O_VPOS = 0,
  59    VS_O_VTEX = 0
  60 };
  61
  62 static void *
  63 create_vert_shader(struct vl_deint_filter *filter)
  64 {
  65    struct ureg_program *shader;
  66    struct ureg_src i_vpos;
  67    struct ureg_dst o_vpos, o_vtex;
  68
  69    shader = ureg_create(TGSI_PROCESSOR_VERTEX);
  70    if (!shader)
  71       return NULL;
  72
  73    i_vpos = ureg_DECL_vs_input(shader, 0);
  74    o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
  75    o_vtex = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX);
  76
  77    ureg_MOV(shader, o_vpos, i_vpos);
  78    ureg_MOV(shader, o_vtex, i_vpos);
  79
  80    ureg_END(shader);
  81
  82    return ureg_create_shader_and_destroy(shader, filter->pipe);
  83 }
  84
  85 static void *
  86 create_copy_frag_shader(struct vl_deint_filter *filter, unsigned field)
  87 {
  88    struct ureg_program *shader;
  89    struct ureg_src i_vtex;
  90    struct ureg_src sampler;
  91    struct ureg_dst o_fragment;
  92    struct ureg_dst t_tex;
  93
  94    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
  95    if (!shader) {
  96       return NULL;
  97    }
  98    t_tex = ureg_DECL_temporary(shader);
  99
 100    i_vtex = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
 101    sampler = ureg_DECL_sampler(shader, 2);
 102    o_fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 103
 104    ureg_MOV(shader, t_tex, i_vtex);
 105    if (field) {
 106       ureg_MOV(shader, ureg_writemask(t_tex, TGSI_WRITEMASK_ZW),
 107                ureg_imm4f(shader, 0, 0, 1.0f, 0));
 108    } else {
 109       ureg_MOV(shader, ureg_writemask(t_tex, TGSI_WRITEMASK_ZW),
 110                ureg_imm1f(shader, 0));
 111    }
 112
 113    ureg_TEX(shader, o_fragment, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_tex), sampler);
 114
 115    ureg_release_temporary(shader, t_tex);
 116    ureg_END(shader);
 117
 118    return ureg_create_shader_and_destroy(shader, filter->pipe);
 119 }
 120
 121 static void *
 122 create_deint_frag_shader(struct vl_deint_filter *filter, unsigned field,
 123                          struct vertex2f *sizes, bool spatial_filter)
 124 {
 125    struct ureg_program *shader;
 126    struct ureg_src i_vtex;
 127    struct ureg_src sampler_cur;
 128    struct ureg_src sampler_prevprev;
 129    struct ureg_src sampler_prev;
 130    struct ureg_src sampler_next;
 131    struct ureg_dst o_fragment;
 132    struct ureg_dst t_tex;
 133    struct ureg_dst t_comp_top, t_comp_bot;
 134    struct ureg_dst t_diff;
 135    struct ureg_dst t_a, t_b;
 136    struct ureg_dst t_weave, t_linear;
 137
 138    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 139    if (!shader) {
 140       return NULL;
 141    }
 142
 143    t_tex = ureg_DECL_temporary(shader);
 144    t_comp_top = ureg_DECL_temporary(shader);
 145    t_comp_bot = ureg_DECL_temporary(shader);
 146    t_diff = ureg_DECL_temporary(shader);
 147    t_a = ureg_DECL_temporary(shader);
 148    t_b = ureg_DECL_temporary(shader);
 149    t_weave = ureg_DECL_temporary(shader);
 150    t_linear = ureg_DECL_temporary(shader);
 151
 152    i_vtex = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
 153    sampler_prevprev = ureg_DECL_sampler(shader, 0);
 154    sampler_prev = ureg_DECL_sampler(shader, 1);
 155    sampler_cur = ureg_DECL_sampler(shader, 2);
 156    sampler_next = ureg_DECL_sampler(shader, 3);
 157    o_fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 158
 159    // we don't care about ZW interpolation (allows better optimization)
 160    ureg_MOV(shader, t_tex, i_vtex);
 161    ureg_MOV(shader, ureg_writemask(t_tex, TGSI_WRITEMASK_ZW),
 162             ureg_imm1f(shader, 0));
 163
 164    // sample between texels for cheap lowpass
 165    ureg_ADD(shader, t_comp_top, ureg_src(t_tex),
 166             ureg_imm4f(shader, sizes->x * 0.5f, sizes->y * -0.5f, 0, 0));
 167    ureg_ADD(shader, t_comp_bot, ureg_src(t_tex),
 168             ureg_imm4f(shader, sizes->x * -0.5f, sizes->y * 0.5f, 1.0f, 0));
 169
 170    if (field == 0) {
 171       /* interpolating top field -> current field is a bottom field */
 172       // cur vs prev2
 173       ureg_TEX(shader, t_a, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_bot), sampler_cur);
 174       ureg_TEX(shader, t_b, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_bot), sampler_prevprev);
 175       ureg_SUB(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_X), ureg_src(t_a), ureg_src(t_b));
 176       // prev vs next
 177       ureg_TEX(shader, t_a, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_top), sampler_prev);
 178       ureg_TEX(shader, t_b, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_top), sampler_next);
 179       ureg_SUB(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_Y), ureg_src(t_a), ureg_src(t_b));
 180    } else {
 181       /* interpolating bottom field -> current field is a top field */
 182       // cur vs prev2
 183       ureg_TEX(shader, t_a, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_top), sampler_cur);
 184       ureg_TEX(shader, t_b, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_top), sampler_prevprev);
 185       ureg_SUB(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_X), ureg_src(t_a), ureg_src(t_b));
 186       // prev vs next
 187       ureg_TEX(shader, t_a, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_bot), sampler_prev);
 188       ureg_TEX(shader, t_b, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_bot), sampler_next);
 189       ureg_SUB(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_Y), ureg_src(t_a), ureg_src(t_b));
 190    }
 191
 192    // absolute maximum of differences
 193    ureg_MAX(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_X), ureg_abs(ureg_src(t_diff)),
 194             ureg_scalar(ureg_abs(ureg_src(t_diff)), TGSI_SWIZZLE_Y));
 195
 196    if (field == 0) {
 197       /* weave with prev top field */
 198       ureg_TEX(shader, t_weave, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_tex), sampler_prev);
 199       /* get linear interpolation from current bottom field */
 200       ureg_ADD(shader, t_comp_top, ureg_src(t_tex), ureg_imm4f(shader, 0, sizes->y * -1.0f, 1.0f, 0));
 201       ureg_TEX(shader, t_linear, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_top), sampler_cur);
 202    } else {
 203       /* weave with prev bottom field */
 204       ureg_ADD(shader, t_comp_bot, ureg_src(t_tex), ureg_imm4f(shader, 0, 0, 1.0f, 0));
 205       ureg_TEX(shader, t_weave, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_bot), sampler_prev);
 206       /* get linear interpolation from current top field */
 207       ureg_ADD(shader, t_comp_bot, ureg_src(t_tex), ureg_imm4f(shader, 0, sizes->y * 1.0f, 0, 0));
 208       ureg_TEX(shader, t_linear, TGSI_TEXTURE_2D_ARRAY, ureg_src(t_comp_bot), sampler_cur);
 209    }
 210
 211    // mix between weave and linear
 212    // fully weave if diff < 6 (0.02353), fully interpolate if diff > 14 (0.05490)
 213    ureg_ADD(shader, ureg_writemask(t_diff, TGSI_WRITEMASK_X), ureg_src(t_diff),
 214             ureg_imm4f(shader, -0.02353f, 0, 0, 0));
 215    ureg_MUL(shader, ureg_saturate(ureg_writemask(t_diff, TGSI_WRITEMASK_X)),
 216             ureg_src(t_diff), ureg_imm4f(shader, 31.8750f, 0, 0, 0));
 217    ureg_LRP(shader, ureg_writemask(o_fragment, TGSI_WRITEMASK_X), ureg_src(t_diff),
 218             ureg_src(t_linear), ureg_src(t_weave));
 219
 220    ureg_release_temporary(shader, t_tex);
 221    ureg_release_temporary(shader, t_comp_top);
 222    ureg_release_temporary(shader, t_comp_bot);
 223    ureg_release_temporary(shader, t_diff);
 224    ureg_release_temporary(shader, t_a);
 225    ureg_release_temporary(shader, t_b);
 226    ureg_release_temporary(shader, t_weave);
 227    ureg_release_temporary(shader, t_linear);
 228    ureg_END(shader);
 229
 230    return ureg_create_shader_and_destroy(shader, filter->pipe);
 231 }
 232
 233 bool
 234 vl_deint_filter_init(struct vl_deint_filter *filter, struct pipe_context *pipe,
 235                      unsigned video_width, unsigned video_height,
 236                      bool skip_chroma, bool spatial_filter)
 237 {
 238    struct pipe_rasterizer_state rs_state;
 239    struct pipe_blend_state blend;
 240    struct pipe_sampler_state sampler;
 241    struct pipe_vertex_element ve;
 242    struct vertex2f sizes;
 243    struct pipe_video_buffer templ;
 244
 245    assert(filter && pipe);
 246    assert(video_width && video_height);
 247
 248    memset(filter, 0, sizeof(*filter));
 249    filter->pipe = pipe;
 250    filter->skip_chroma = skip_chroma;
 251    filter->video_width = video_width;
 252    filter->video_height = video_height;
 253
 254    /* TODO: handle other than 4:2:0 subsampling */
 255    memset(&templ, 0, sizeof(templ));
 256    templ.buffer_format = PIPE_FORMAT_YV12;
 257    templ.chroma_format = PIPE_VIDEO_CHROMA_FORMAT_420;
 258    templ.width = video_width;
 259    templ.height = video_height;
 260    templ.interlaced = true;
 261    filter->video_buffer = vl_video_buffer_create(pipe, &templ);
 262    if (!filter->video_buffer)
 263       goto error_video_buffer;
 264
 265    memset(&rs_state, 0, sizeof(rs_state));
 266    rs_state.half_pixel_center = true;
 267    rs_state.bottom_edge_rule = true;
 268    rs_state.depth_clip = 1;
 269    filter->rs_state = pipe->create_rasterizer_state(pipe, &rs_state);
 270    if (!filter->rs_state)
 271       goto error_rs_state;
 272
 273    memset(&blend, 0, sizeof blend);
 274    blend.rt[0].colormask = PIPE_MASK_RGBA;
 275    filter->blend = pipe->create_blend_state(pipe, &blend);
 276    if (!filter->blend)
 277       goto error_blend;
 278
 279    memset(&sampler, 0, sizeof(sampler));
 280    sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 281    sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 282    sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 283    sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR;
 284    sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 285    sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR;
 286    sampler.normalized_coords = 1;
 287    filter->sampler[0] = pipe->create_sampler_state(pipe, &sampler);
 288    filter->sampler[1] = filter->sampler[2] = filter->sampler[3] = filter->sampler[0];
 289    if (!filter->sampler[0])
 290       goto error_sampler;
 291
 292    filter->quad = vl_vb_upload_quads(pipe);
 293    if(!filter->quad.buffer)
 294       goto error_quad;
 295
 296    memset(&ve, 0, sizeof(ve));
 297    ve.src_offset = 0;
 298    ve.instance_divisor = 0;
 299    ve.vertex_buffer_index = 0;
 300    ve.src_format = PIPE_FORMAT_R32G32_FLOAT;
 301    filter->ves = pipe->create_vertex_elements_state(pipe, 1, &ve);
 302    if (!filter->ves)
 303       goto error_ves;
 304
 305    sizes.x = 1.0f / video_width;
 306    sizes.y = 1.0f / video_height;
 307
 308    filter->vs = create_vert_shader(filter);
 309    if (!filter->vs)
 310       goto error_vs;
 311
 312    filter->fs_copy_top = create_copy_frag_shader(filter, 0);
 313    if (!filter->fs_copy_top)
 314       goto error_fs_copy_top;
 315
 316    filter->fs_copy_bottom = create_copy_frag_shader(filter, 1);
 317    if (!filter->fs_copy_bottom)
 318       goto error_fs_copy_bottom;
 319
 320    filter->fs_deint_top = create_deint_frag_shader(filter, 0, &sizes, spatial_filter);
 321    if (!filter->fs_deint_top)
 322       goto error_fs_deint_top;
 323
 324    filter->fs_deint_bottom = create_deint_frag_shader(filter, 1, &sizes, spatial_filter);
 325    if (!filter->fs_deint_bottom)
 326       goto error_fs_deint_bottom;
 327
 328    return true;
 329
 330 error_fs_deint_bottom:
 331    pipe->delete_fs_state(pipe, filter->fs_deint_top);
 332
 333 error_fs_deint_top:
 334    pipe->delete_fs_state(pipe, filter->fs_copy_bottom);
 335
 336 error_fs_copy_bottom:
 337    pipe->delete_fs_state(pipe, filter->fs_copy_top);
 338
 339 error_fs_copy_top:
 340    pipe->delete_vs_state(pipe, filter->vs);
 341
 342 error_vs:
 343    pipe->delete_vertex_elements_state(pipe, filter->ves);
 344
 345 error_ves:
 346    pipe_resource_reference(&filter->quad.buffer, NULL);
 347
 348 error_quad:
 349    pipe->delete_sampler_state(pipe, filter->sampler);
 350
 351 error_sampler:
 352    pipe->delete_blend_state(pipe, filter->blend);
 353
 354 error_blend:
 355    pipe->delete_rasterizer_state(pipe, filter->rs_state);
 356
 357 error_rs_state:
 358    filter->video_buffer->destroy(filter->video_buffer);
 359
 360 error_video_buffer:
 361    return false;
 362 }
 363
 364 void
 365 vl_deint_filter_cleanup(struct vl_deint_filter *filter)
 366 {
 367    assert(filter);
 368
 369    filter->pipe->delete_sampler_state(filter->pipe, filter->sampler[0]);
 370    filter->pipe->delete_blend_state(filter->pipe, filter->blend);
 371    filter->pipe->delete_rasterizer_state(filter->pipe, filter->rs_state);
 372    filter->pipe->delete_vertex_elements_state(filter->pipe, filter->ves);
 373    pipe_resource_reference(&filter->quad.buffer, NULL);
 374
 375    filter->pipe->delete_vs_state(filter->pipe, filter->vs);
 376    filter->pipe->delete_fs_state(filter->pipe, filter->fs_copy_top);
 377    filter->pipe->delete_fs_state(filter->pipe, filter->fs_copy_bottom);
 378    filter->pipe->delete_fs_state(filter->pipe, filter->fs_deint_top);
 379    filter->pipe->delete_fs_state(filter->pipe, filter->fs_deint_bottom);
 380
 381    filter->video_buffer->destroy(filter->video_buffer);
 382 }
 383
 384 bool
 385 vl_deint_filter_check_buffers(struct vl_deint_filter *filter,
 386                               struct pipe_video_buffer *prevprev,
 387                               struct pipe_video_buffer *prev,
 388                               struct pipe_video_buffer *cur,
 389                               struct pipe_video_buffer *next)
 390 {
 391    int i;
 392    struct pipe_video_buffer *bufs[] = { prevprev, prev, cur, next };
 393
 394    for (i = 0; i < 4; i++) {
 395       if (bufs[i]->chroma_format != PIPE_VIDEO_CHROMA_FORMAT_420)
 396          return false;
 397       if (bufs[i]->width < filter->video_width ||
 398           bufs[i]->height < filter->video_height)
 399          return false;
 400       if (!bufs[i]->interlaced)
 401          return false;
 402    }
 403
 404    return true;
 405 }
 406
 407 void
 408 vl_deint_filter_render(struct vl_deint_filter *filter,
 409                        struct pipe_video_buffer *prevprev,
 410                        struct pipe_video_buffer *prev,
 411                        struct pipe_video_buffer *cur,
 412                        struct pipe_video_buffer *next,
 413                        unsigned field)
 414 {
 415    struct pipe_viewport_state viewport;
 416    struct pipe_framebuffer_state fb_state;
 417    struct pipe_sampler_view **cur_sv;
 418    struct pipe_sampler_view **prevprev_sv;
 419    struct pipe_sampler_view **prev_sv;
 420    struct pipe_sampler_view **next_sv;
 421    struct pipe_sampler_view *sampler_views[4];
 422    struct pipe_surface **dst_surfaces;
 423    int j;
 424
 425    assert(filter && prevprev && prev && cur && next && field <= 1);
 426
 427    /* set up destination and source */
 428    dst_surfaces = filter->video_buffer->get_surfaces(filter->video_buffer);
 429    cur_sv = cur->get_sampler_view_components(cur);
 430    prevprev_sv = prevprev->get_sampler_view_components(prevprev);
 431    prev_sv = prev->get_sampler_view_components(prev);
 432    next_sv = next->get_sampler_view_components(next);
 433
 434    /* set up pipe state */
 435    filter->pipe->bind_rasterizer_state(filter->pipe, filter->rs_state);
 436    filter->pipe->bind_blend_state(filter->pipe, filter->blend);
 437    filter->pipe->set_vertex_buffers(filter->pipe, 0, 1, &filter->quad);
 438    filter->pipe->bind_vertex_elements_state(filter->pipe, filter->ves);
 439    filter->pipe->bind_vs_state(filter->pipe, filter->vs);
 440    filter->pipe->bind_sampler_states(filter->pipe, PIPE_SHADER_FRAGMENT,
 441                                      0, 4, filter->sampler);
 442
 443    /* prepare viewport */
 444    memset(&viewport, 0, sizeof(viewport));
 445    viewport.scale[2] = 1;
 446    viewport.scale[3] = 1;
 447
 448    /* prepare framebuffer */
 449    memset(&fb_state, 0, sizeof(fb_state));
 450    fb_state.nr_cbufs = 1;
 451
 452    /* process each plane separately */
 453    for (j = 0; j < 3; j++) {
 454       /* select correct YV12 surfaces */
 455       int k = j == 1 ? 2 :
 456               j == 2 ? 1 : 0;
 457       struct pipe_surface *blit_surf = dst_surfaces[2 * k + field];
 458       struct pipe_surface *dst_surf = dst_surfaces[2 * k + 1 - field];
 459
 460       /* update render target state */
 461       viewport.scale[0] = blit_surf->texture->width0;
 462       viewport.scale[1] = blit_surf->texture->height0;
 463       fb_state.width = blit_surf->texture->width0;
 464       fb_state.height = blit_surf->texture->height0;
 465
 466       /* update sampler view sources  */
 467       sampler_views[0] = prevprev_sv[j];
 468       sampler_views[1] = prev_sv[j];
 469       sampler_views[2] = cur_sv[j];
 470       sampler_views[3] = next_sv[j];
 471       filter->pipe->set_sampler_views(filter->pipe, PIPE_SHADER_FRAGMENT, 0, 4, sampler_views);
 472
 473       /* blit current field */
 474       fb_state.cbufs[0] = blit_surf;
 475       filter->pipe->bind_fs_state(filter->pipe, field ? filter->fs_copy_bottom : filter->fs_copy_top);
 476       filter->pipe->set_framebuffer_state(filter->pipe, &fb_state);
 477       filter->pipe->set_viewport_states(filter->pipe, 0, 1, &viewport);
 478       util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4);
 479
 480       /* blit or interpolate other field */
 481       fb_state.cbufs[0] = dst_surf;
 482       filter->pipe->set_framebuffer_state(filter->pipe, &fb_state);
 483       if (j > 0 && filter->skip_chroma) {
 484          util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4);
 485       } else {
 486          filter->pipe->bind_fs_state(filter->pipe, field ? filter->fs_deint_top : filter->fs_deint_bottom);
 487          util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4);
 488       }
 489    }
 490 }