src/gallium/auxiliary/vl/vl_zscan.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2011 Christian König
   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 VMWARE 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 #include <assert.h>
  29
  30 #include "pipe/p_screen.h"
  31 #include "pipe/p_context.h"
  32
  33 #include "util/u_draw.h"
  34 #include "util/u_sampler.h"
  35 #include "util/u_inlines.h"
  36 #include "util/u_memory.h"
  37
  38 #include "tgsi/tgsi_ureg.h"
  39
  40 #include "vl_defines.h"
  41 #include "vl_types.h"
  42
  43 #include "vl_zscan.h"
  44 #include "vl_vertex_buffers.h"
  45
  46 enum VS_OUTPUT
  47 {
  48    VS_O_VPOS = 0,
  49    VS_O_VTEX = 0
  50 };
  51
  52 const int vl_zscan_normal_16[] =
  53 {
  54    /* Zig-Zag scan pattern */
  55     0, 1, 4, 8, 5, 2, 3, 6,
  56     9,12,13,10, 7,11,14,15
  57 };
  58
  59 const int vl_zscan_linear[] =
  60 {
  61    /* Linear scan pattern */
  62     0, 1, 2, 3, 4, 5, 6, 7,
  63     8, 9,10,11,12,13,14,15,
  64    16,17,18,19,20,21,22,23,
  65    24,25,26,27,28,29,30,31,
  66    32,33,34,35,36,37,38,39,
  67    40,41,42,43,44,45,46,47,
  68    48,49,50,51,52,53,54,55,
  69    56,57,58,59,60,61,62,63
  70 };
  71
  72 const int vl_zscan_normal[] =
  73 {
  74    /* Zig-Zag scan pattern */
  75     0, 1, 8,16, 9, 2, 3,10,
  76    17,24,32,25,18,11, 4, 5,
  77    12,19,26,33,40,48,41,34,
  78    27,20,13, 6, 7,14,21,28,
  79    35,42,49,56,57,50,43,36,
  80    29,22,15,23,30,37,44,51,
  81    58,59,52,45,38,31,39,46,
  82    53,60,61,54,47,55,62,63
  83 };
  84
  85 const int vl_zscan_alternate[] =
  86 {
  87    /* Alternate scan pattern */
  88     0, 8,16,24, 1, 9, 2,10,
  89    17,25,32,40,48,56,57,49,
  90    41,33,26,18, 3,11, 4,12,
  91    19,27,34,42,50,58,35,43,
  92    51,59,20,28, 5,13, 6,14,
  93    21,29,36,44,52,60,37,45,
  94    53,61,22,30, 7,15,23,31,
  95    38,46,54,62,39,47,55,63
  96 };
  97
  98 const int vl_zscan_h265_up_right_diagonal_16[] =
  99 {
 100    /* Up-right diagonal scan order for 4x4 blocks - see H.265 section 6.5.3. */
 101     0,  4,  1,  8,  5,  2, 12,  9,
 102     6,  3, 13, 10,  7, 14, 11, 15,
 103 };
 104
 105 const int vl_zscan_h265_up_right_diagonal[] =
 106 {
 107    /* Up-right diagonal scan order for 8x8 blocks - see H.265 section 6.5.3. */
 108     0,  8,  1, 16,  9,  2, 24, 17,
 109    10,  3, 32, 25, 18, 11,  4, 40,
 110    33, 26, 19, 12,  5, 48, 41, 34,
 111    27, 20, 13,  6, 56, 49, 42, 35,
 112    28, 21, 14,  7, 57, 50, 43, 36,
 113    29, 22, 15, 58, 51, 44, 37, 30,
 114    23, 59, 52, 45, 38, 31, 60, 53,
 115    46, 39, 61, 54, 47, 62, 55, 63,
 116 };
 117
 118
 119 static void *
 120 create_vert_shader(struct vl_zscan *zscan)
 121 {
 122    struct ureg_program *shader;
 123    struct ureg_src scale;
 124    struct ureg_src vrect, vpos, block_num;
 125    struct ureg_dst tmp;
 126    struct ureg_dst o_vpos;
 127    struct ureg_dst *o_vtex;
 128    unsigned i;
 129
 130    shader = ureg_create(PIPE_SHADER_VERTEX);
 131    if (!shader)
 132       return NULL;
 133
 134    o_vtex = MALLOC(zscan->num_channels * sizeof(struct ureg_dst));
 135
 136    scale = ureg_imm2f(shader,
 137       (float)VL_BLOCK_WIDTH / zscan->buffer_width,
 138       (float)VL_BLOCK_HEIGHT / zscan->buffer_height);
 139
 140    vrect = ureg_DECL_vs_input(shader, VS_I_RECT);
 141    vpos = ureg_DECL_vs_input(shader, VS_I_VPOS);
 142    block_num = ureg_DECL_vs_input(shader, VS_I_BLOCK_NUM);
 143
 144    tmp = ureg_DECL_temporary(shader);
 145
 146    o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
 147
 148    for (i = 0; i < zscan->num_channels; ++i)
 149       o_vtex[i] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX + i);
 150
 151    /*
 152     * o_vpos.xy = (vpos + vrect) * scale
 153     * o_vpos.zw = 1.0f
 154     *
 155     * tmp.xy = InstanceID / blocks_per_line
 156     * tmp.x = frac(tmp.x)
 157     * tmp.y = floor(tmp.y)
 158     *
 159     * o_vtex.x = vrect.x / blocks_per_line + tmp.x
 160     * o_vtex.y = vrect.y
 161     * o_vtex.z = tmp.z * blocks_per_line / blocks_total
 162     */
 163    ureg_ADD(shader, ureg_writemask(tmp, TGSI_WRITEMASK_XY), vpos, vrect);
 164    ureg_MUL(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_XY), ureg_src(tmp), scale);
 165    ureg_MOV(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_ZW), ureg_imm1f(shader, 1.0f));
 166
 167    ureg_MUL(shader, ureg_writemask(tmp, TGSI_WRITEMASK_XW), ureg_scalar(block_num, TGSI_SWIZZLE_X),
 168             ureg_imm1f(shader, 1.0f / zscan->blocks_per_line));
 169
 170    ureg_FRC(shader, ureg_writemask(tmp, TGSI_WRITEMASK_Y), ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_X));
 171    ureg_FLR(shader, ureg_writemask(tmp, TGSI_WRITEMASK_W), ureg_src(tmp));
 172
 173    for (i = 0; i < zscan->num_channels; ++i) {
 174       ureg_ADD(shader, ureg_writemask(tmp, TGSI_WRITEMASK_X), ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_Y),
 175                ureg_imm1f(shader, 1.0f / (zscan->blocks_per_line * VL_BLOCK_WIDTH)
 176                 * ((signed)i - (signed)zscan->num_channels / 2)));
 177
 178       ureg_MAD(shader, ureg_writemask(o_vtex[i], TGSI_WRITEMASK_X), vrect,
 179                ureg_imm1f(shader, 1.0f / zscan->blocks_per_line), ureg_src(tmp));
 180       ureg_MOV(shader, ureg_writemask(o_vtex[i], TGSI_WRITEMASK_Y), vrect);
 181       ureg_MOV(shader, ureg_writemask(o_vtex[i], TGSI_WRITEMASK_Z), vpos);
 182       ureg_MUL(shader, ureg_writemask(o_vtex[i], TGSI_WRITEMASK_W), ureg_src(tmp),
 183                ureg_imm1f(shader, (float)zscan->blocks_per_line / zscan->blocks_total));
 184    }
 185
 186    ureg_release_temporary(shader, tmp);
 187    ureg_END(shader);
 188
 189    FREE(o_vtex);
 190
 191    return ureg_create_shader_and_destroy(shader, zscan->pipe);
 192 }
 193
 194 static void *
 195 create_frag_shader(struct vl_zscan *zscan)
 196 {
 197    struct ureg_program *shader;
 198    struct ureg_src *vtex;
 199
 200    struct ureg_src samp_src, samp_scan, samp_quant;
 201
 202    struct ureg_dst *tmp;
 203    struct ureg_dst quant, fragment;
 204
 205    unsigned i;
 206
 207    shader = ureg_create(PIPE_SHADER_FRAGMENT);
 208    if (!shader)
 209       return NULL;
 210
 211    vtex = MALLOC(zscan->num_channels * sizeof(struct ureg_src));
 212    tmp = MALLOC(zscan->num_channels * sizeof(struct ureg_dst));
 213
 214    for (i = 0; i < zscan->num_channels; ++i)
 215       vtex[i] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX + i, TGSI_INTERPOLATE_LINEAR);
 216
 217    samp_src = ureg_DECL_sampler(shader, 0);
 218    samp_scan = ureg_DECL_sampler(shader, 1);
 219    samp_quant = ureg_DECL_sampler(shader, 2);
 220
 221    for (i = 0; i < zscan->num_channels; ++i)
 222       tmp[i] = ureg_DECL_temporary(shader);
 223    quant = ureg_DECL_temporary(shader);
 224
 225    fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 226
 227    /*
 228     * tmp.x = tex(vtex, 1)
 229     * tmp.y = vtex.z
 230     * fragment = tex(tmp, 0) * quant
 231     */
 232    for (i = 0; i < zscan->num_channels; ++i)
 233       ureg_TEX(shader, ureg_writemask(tmp[i], TGSI_WRITEMASK_X), TGSI_TEXTURE_2D, vtex[i], samp_scan);
 234
 235    for (i = 0; i < zscan->num_channels; ++i)
 236       ureg_MOV(shader, ureg_writemask(tmp[i], TGSI_WRITEMASK_Y), ureg_scalar(vtex[i], TGSI_SWIZZLE_W));
 237
 238    for (i = 0; i < zscan->num_channels; ++i) {
 239       ureg_TEX(shader, ureg_writemask(tmp[0], TGSI_WRITEMASK_X << i), TGSI_TEXTURE_2D, ureg_src(tmp[i]), samp_src);
 240       ureg_TEX(shader, ureg_writemask(quant, TGSI_WRITEMASK_X << i), TGSI_TEXTURE_3D, vtex[i], samp_quant);
 241    }
 242
 243    ureg_MUL(shader, quant, ureg_src(quant), ureg_imm1f(shader, 16.0f));
 244    ureg_MUL(shader, fragment, ureg_src(tmp[0]), ureg_src(quant));
 245
 246    for (i = 0; i < zscan->num_channels; ++i)
 247       ureg_release_temporary(shader, tmp[i]);
 248    ureg_END(shader);
 249
 250    FREE(vtex);
 251    FREE(tmp);
 252
 253    return ureg_create_shader_and_destroy(shader, zscan->pipe);
 254 }
 255
 256 static bool
 257 init_shaders(struct vl_zscan *zscan)
 258 {
 259    assert(zscan);
 260
 261    zscan->vs = create_vert_shader(zscan);
 262    if (!zscan->vs)
 263       goto error_vs;
 264
 265    zscan->fs = create_frag_shader(zscan);
 266    if (!zscan->fs)
 267       goto error_fs;
 268
 269    return true;
 270
 271 error_fs:
 272    zscan->pipe->delete_vs_state(zscan->pipe, zscan->vs);
 273
 274 error_vs:
 275    return false;
 276 }
 277
 278 static void
 279 cleanup_shaders(struct vl_zscan *zscan)
 280 {
 281    assert(zscan);
 282
 283    zscan->pipe->delete_vs_state(zscan->pipe, zscan->vs);
 284    zscan->pipe->delete_fs_state(zscan->pipe, zscan->fs);
 285 }
 286
 287 static bool
 288 init_state(struct vl_zscan *zscan)
 289 {
 290    struct pipe_blend_state blend;
 291    struct pipe_rasterizer_state rs_state;
 292    struct pipe_sampler_state sampler;
 293    unsigned i;
 294
 295    assert(zscan);
 296
 297    memset(&rs_state, 0, sizeof(rs_state));
 298    rs_state.half_pixel_center = true;
 299    rs_state.bottom_edge_rule = true;
 300    rs_state.depth_clip = 1;
 301    zscan->rs_state = zscan->pipe->create_rasterizer_state(zscan->pipe, &rs_state);
 302    if (!zscan->rs_state)
 303       goto error_rs_state;
 304
 305    memset(&blend, 0, sizeof blend);
 306
 307    blend.independent_blend_enable = 0;
 308    blend.rt[0].blend_enable = 0;
 309    blend.rt[0].rgb_func = PIPE_BLEND_ADD;
 310    blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 311    blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
 312    blend.rt[0].alpha_func = PIPE_BLEND_ADD;
 313    blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 314    blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
 315    blend.logicop_enable = 0;
 316    blend.logicop_func = PIPE_LOGICOP_CLEAR;
 317    /* Needed to allow color writes to FB, even if blending disabled */
 318    blend.rt[0].colormask = PIPE_MASK_RGBA;
 319    blend.dither = 0;
 320    zscan->blend = zscan->pipe->create_blend_state(zscan->pipe, &blend);
 321    if (!zscan->blend)
 322       goto error_blend;
 323
 324    for (i = 0; i < 3; ++i) {
 325       memset(&sampler, 0, sizeof(sampler));
 326       sampler.wrap_s = PIPE_TEX_WRAP_REPEAT;
 327       sampler.wrap_t = PIPE_TEX_WRAP_REPEAT;
 328       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 329       sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 330       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 331       sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 332       sampler.compare_mode = PIPE_TEX_COMPARE_NONE;
 333       sampler.compare_func = PIPE_FUNC_ALWAYS;
 334       sampler.normalized_coords = 1;
 335       zscan->samplers[i] = zscan->pipe->create_sampler_state(zscan->pipe, &sampler);
 336       if (!zscan->samplers[i])
 337          goto error_samplers;
 338    }
 339
 340    return true;
 341
 342 error_samplers:
 343    for (i = 0; i < 2; ++i)
 344       if (zscan->samplers[i])
 345          zscan->pipe->delete_sampler_state(zscan->pipe, zscan->samplers[i]);
 346
 347    zscan->pipe->delete_rasterizer_state(zscan->pipe, zscan->rs_state);
 348
 349 error_blend:
 350    zscan->pipe->delete_blend_state(zscan->pipe, zscan->blend);
 351
 352 error_rs_state:
 353    return false;
 354 }
 355
 356 static void
 357 cleanup_state(struct vl_zscan *zscan)
 358 {
 359    unsigned i;
 360
 361    assert(zscan);
 362
 363    for (i = 0; i < 3; ++i)
 364       zscan->pipe->delete_sampler_state(zscan->pipe, zscan->samplers[i]);
 365
 366    zscan->pipe->delete_rasterizer_state(zscan->pipe, zscan->rs_state);
 367    zscan->pipe->delete_blend_state(zscan->pipe, zscan->blend);
 368 }
 369
 370 struct pipe_sampler_view *
 371 vl_zscan_layout(struct pipe_context *pipe, const int layout[64], unsigned blocks_per_line)
 372 {
 373    const unsigned total_size = blocks_per_line * VL_BLOCK_WIDTH * VL_BLOCK_HEIGHT;
 374
 375    int patched_layout[64];
 376
 377    struct pipe_resource res_tmpl, *res;
 378    struct pipe_sampler_view sv_tmpl, *sv;
 379    struct pipe_transfer *buf_transfer;
 380    unsigned x, y, i, pitch;
 381    float *f;
 382
 383    struct pipe_box rect =
 384    {
 385       0, 0, 0,
 386       VL_BLOCK_WIDTH * blocks_per_line,
 387       VL_BLOCK_HEIGHT,
 388       1
 389    };
 390
 391    assert(pipe && layout && blocks_per_line);
 392
 393    for (i = 0; i < 64; ++i)
 394       patched_layout[layout[i]] = i;
 395
 396    memset(&res_tmpl, 0, sizeof(res_tmpl));
 397    res_tmpl.target = PIPE_TEXTURE_2D;
 398    res_tmpl.format = PIPE_FORMAT_R32_FLOAT;
 399    res_tmpl.width0 = VL_BLOCK_WIDTH * blocks_per_line;
 400    res_tmpl.height0 = VL_BLOCK_HEIGHT;
 401    res_tmpl.depth0 = 1;
 402    res_tmpl.array_size = 1;
 403    res_tmpl.usage = PIPE_USAGE_IMMUTABLE;
 404    res_tmpl.bind = PIPE_BIND_SAMPLER_VIEW;
 405
 406    res = pipe->screen->resource_create(pipe->screen, &res_tmpl);
 407    if (!res)
 408       goto error_resource;
 409
 410    f = pipe->transfer_map(pipe, res,
 411                           0, PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD_RANGE,
 412                           &rect, &buf_transfer);
 413    if (!f)
 414       goto error_map;
 415
 416    pitch = buf_transfer->stride / sizeof(float);
 417
 418    for (i = 0; i < blocks_per_line; ++i)
 419       for (y = 0; y < VL_BLOCK_HEIGHT; ++y)
 420          for (x = 0; x < VL_BLOCK_WIDTH; ++x) {
 421             float addr = patched_layout[x + y * VL_BLOCK_WIDTH] +
 422                i * VL_BLOCK_WIDTH * VL_BLOCK_HEIGHT;
 423
 424             addr /= total_size;
 425
 426             f[i * VL_BLOCK_WIDTH + y * pitch + x] = addr;
 427          }
 428
 429    pipe->transfer_unmap(pipe, buf_transfer);
 430
 431    memset(&sv_tmpl, 0, sizeof(sv_tmpl));
 432    u_sampler_view_default_template(&sv_tmpl, res, res->format);
 433    sv = pipe->create_sampler_view(pipe, res, &sv_tmpl);
 434    pipe_resource_reference(&res, NULL);
 435    if (!sv)
 436       goto error_map;
 437
 438    return sv;
 439
 440 error_map:
 441    pipe_resource_reference(&res, NULL);
 442
 443 error_resource:
 444    return NULL;
 445 }
 446
 447 bool
 448 vl_zscan_init(struct vl_zscan *zscan, struct pipe_context *pipe,
 449               unsigned buffer_width, unsigned buffer_height,
 450               unsigned blocks_per_line, unsigned blocks_total,
 451               unsigned num_channels)
 452 {
 453    assert(zscan && pipe);
 454
 455    zscan->pipe = pipe;
 456    zscan->buffer_width = buffer_width;
 457    zscan->buffer_height = buffer_height;
 458    zscan->num_channels = num_channels;
 459    zscan->blocks_per_line = blocks_per_line;
 460    zscan->blocks_total = blocks_total;
 461
 462    if(!init_shaders(zscan))
 463       return false;
 464
 465    if(!init_state(zscan)) {
 466       cleanup_shaders(zscan);
 467       return false;
 468    }
 469
 470    return true;
 471 }
 472
 473 void
 474 vl_zscan_cleanup(struct vl_zscan *zscan)
 475 {
 476    assert(zscan);
 477
 478    cleanup_shaders(zscan);
 479    cleanup_state(zscan);
 480 }
 481
 482 bool
 483 vl_zscan_init_buffer(struct vl_zscan *zscan, struct vl_zscan_buffer *buffer,
 484                      struct pipe_sampler_view *src, struct pipe_surface *dst)
 485 {
 486    struct pipe_resource res_tmpl, *res;
 487    struct pipe_sampler_view sv_tmpl;
 488
 489    assert(zscan && buffer);
 490
 491    memset(buffer, 0, sizeof(struct vl_zscan_buffer));
 492
 493    pipe_sampler_view_reference(&buffer->src, src);
 494
 495    buffer->viewport.scale[0] = dst->width;
 496    buffer->viewport.scale[1] = dst->height;
 497    buffer->viewport.scale[2] = 1;
 498    buffer->viewport.translate[0] = 0;
 499    buffer->viewport.translate[1] = 0;
 500    buffer->viewport.translate[2] = 0;
 501
 502    buffer->fb_state.width = dst->width;
 503    buffer->fb_state.height = dst->height;
 504    buffer->fb_state.nr_cbufs = 1;
 505    pipe_surface_reference(&buffer->fb_state.cbufs[0], dst);
 506
 507    memset(&res_tmpl, 0, sizeof(res_tmpl));
 508    res_tmpl.target = PIPE_TEXTURE_3D;
 509    res_tmpl.format = PIPE_FORMAT_R8_UNORM;
 510    res_tmpl.width0 = VL_BLOCK_WIDTH * zscan->blocks_per_line;
 511    res_tmpl.height0 = VL_BLOCK_HEIGHT;
 512    res_tmpl.depth0 = 2;
 513    res_tmpl.array_size = 1;
 514    res_tmpl.usage = PIPE_USAGE_IMMUTABLE;
 515    res_tmpl.bind = PIPE_BIND_SAMPLER_VIEW;
 516
 517    res = zscan->pipe->screen->resource_create(zscan->pipe->screen, &res_tmpl);
 518    if (!res)
 519       return false;
 520
 521    memset(&sv_tmpl, 0, sizeof(sv_tmpl));
 522    u_sampler_view_default_template(&sv_tmpl, res, res->format);
 523    sv_tmpl.swizzle_r = sv_tmpl.swizzle_g = sv_tmpl.swizzle_b = sv_tmpl.swizzle_a = TGSI_SWIZZLE_X;
 524    buffer->quant = zscan->pipe->create_sampler_view(zscan->pipe, res, &sv_tmpl);
 525    pipe_resource_reference(&res, NULL);
 526    if (!buffer->quant)
 527       return false;
 528
 529    return true;
 530 }
 531
 532 void
 533 vl_zscan_cleanup_buffer(struct vl_zscan_buffer *buffer)
 534 {
 535    assert(buffer);
 536
 537    pipe_sampler_view_reference(&buffer->src, NULL);
 538    pipe_sampler_view_reference(&buffer->layout, NULL);
 539    pipe_sampler_view_reference(&buffer->quant, NULL);
 540    pipe_surface_reference(&buffer->fb_state.cbufs[0], NULL);
 541 }
 542
 543 void
 544 vl_zscan_set_layout(struct vl_zscan_buffer *buffer, struct pipe_sampler_view *layout)
 545 {
 546    assert(buffer);
 547    assert(layout);
 548
 549    pipe_sampler_view_reference(&buffer->layout, layout);
 550 }
 551
 552 void
 553 vl_zscan_upload_quant(struct vl_zscan *zscan, struct vl_zscan_buffer *buffer,
 554                       const uint8_t matrix[64], bool intra)
 555 {
 556    struct pipe_context *pipe;
 557    struct pipe_transfer *buf_transfer;
 558    unsigned x, y, i, pitch;
 559    uint8_t *data;
 560
 561    struct pipe_box rect =
 562    {
 563       0, 0, intra ? 1 : 0,
 564       VL_BLOCK_WIDTH,
 565       VL_BLOCK_HEIGHT,
 566       1
 567    };
 568
 569    assert(buffer);
 570    assert(matrix);
 571
 572    pipe = zscan->pipe;
 573
 574    rect.width *= zscan->blocks_per_line;
 575
 576    data = pipe->transfer_map(pipe, buffer->quant->texture,
 577                              0, PIPE_TRANSFER_WRITE |
 578                              PIPE_TRANSFER_DISCARD_RANGE,
 579                              &rect, &buf_transfer);
 580    if (!data)
 581       return;
 582
 583    pitch = buf_transfer->stride;
 584
 585    for (i = 0; i < zscan->blocks_per_line; ++i)
 586       for (y = 0; y < VL_BLOCK_HEIGHT; ++y)
 587          for (x = 0; x < VL_BLOCK_WIDTH; ++x)
 588             data[i * VL_BLOCK_WIDTH + y * pitch + x] = matrix[x + y * VL_BLOCK_WIDTH];
 589
 590    pipe->transfer_unmap(pipe, buf_transfer);
 591 }
 592
 593 void
 594 vl_zscan_render(struct vl_zscan *zscan, struct vl_zscan_buffer *buffer, unsigned num_instances)
 595 {
 596    assert(buffer);
 597
 598    zscan->pipe->bind_rasterizer_state(zscan->pipe, zscan->rs_state);
 599    zscan->pipe->bind_blend_state(zscan->pipe, zscan->blend);
 600    zscan->pipe->bind_sampler_states(zscan->pipe, PIPE_SHADER_FRAGMENT,
 601                                     0, 3, zscan->samplers);
 602    zscan->pipe->set_framebuffer_state(zscan->pipe, &buffer->fb_state);
 603    zscan->pipe->set_viewport_states(zscan->pipe, 0, 1, &buffer->viewport);
 604    zscan->pipe->set_sampler_views(zscan->pipe, PIPE_SHADER_FRAGMENT,
 605                                   0, 3, &buffer->src);
 606    zscan->pipe->bind_vs_state(zscan->pipe, zscan->vs);
 607    zscan->pipe->bind_fs_state(zscan->pipe, zscan->fs);
 608    util_draw_arrays_instanced(zscan->pipe, PIPE_PRIM_QUADS, 0, 4, 0, num_instances);
 609 }