src/gallium/auxiliary/vl/vl_idct.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 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 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 #include "vl_idct.h"
  29 #include "vl_vertex_buffers.h"
  30 #include "util/u_draw.h"
  31 #include <assert.h>
  32 #include <pipe/p_context.h>
  33 #include <pipe/p_screen.h>
  34 #include <util/u_inlines.h>
  35 #include <util/u_sampler.h>
  36 #include <util/u_format.h>
  37 #include <tgsi/tgsi_ureg.h>
  38 #include "vl_types.h"
  39
  40 #define BLOCK_WIDTH 8
  41 #define BLOCK_HEIGHT 8
  42
  43 #define SCALE_FACTOR_16_TO_9 (32768.0f / 256.0f)
  44
  45 #define STAGE1_SCALE 4.0f
  46 #define STAGE2_SCALE (SCALE_FACTOR_16_TO_9 / STAGE1_SCALE)
  47
  48 #define NR_RENDER_TARGETS 1
  49
  50 enum VS_INPUT
  51 {
  52    VS_I_RECT,
  53    VS_I_VPOS,
  54
  55    NUM_VS_INPUTS
  56 };
  57
  58 enum VS_OUTPUT
  59 {
  60    VS_O_VPOS,
  61    VS_O_BLOCK,
  62    VS_O_TEX,
  63    VS_O_START
  64 };
  65
  66 static const float const_matrix[8][8] = {
  67    {  0.3535530f,  0.3535530f,  0.3535530f,  0.3535530f,  0.3535530f,  0.3535530f,  0.353553f,  0.3535530f },
  68    {  0.4903930f,  0.4157350f,  0.2777850f,  0.0975451f, -0.0975452f, -0.2777850f, -0.415735f, -0.4903930f },
  69    {  0.4619400f,  0.1913420f, -0.1913420f, -0.4619400f, -0.4619400f, -0.1913420f,  0.191342f,  0.4619400f },
  70    {  0.4157350f, -0.0975452f, -0.4903930f, -0.2777850f,  0.2777850f,  0.4903930f,  0.097545f, -0.4157350f },
  71    {  0.3535530f, -0.3535530f, -0.3535530f,  0.3535540f,  0.3535530f, -0.3535540f, -0.353553f,  0.3535530f },
  72    {  0.2777850f, -0.4903930f,  0.0975452f,  0.4157350f, -0.4157350f, -0.0975451f,  0.490393f, -0.2777850f },
  73    {  0.1913420f, -0.4619400f,  0.4619400f, -0.1913420f, -0.1913410f,  0.4619400f, -0.461940f,  0.1913420f },
  74    {  0.0975451f, -0.2777850f,  0.4157350f, -0.4903930f,  0.4903930f, -0.4157350f,  0.277786f, -0.0975458f }
  75 };
  76
  77 static void *
  78 create_vert_shader(struct vl_idct *idct)
  79 {
  80    struct ureg_program *shader;
  81    struct ureg_src scale;
  82    struct ureg_src vrect, vpos;
  83    struct ureg_dst t_vpos;
  84    struct ureg_dst o_vpos, o_block, o_tex, o_start;
  85
  86    shader = ureg_create(TGSI_PROCESSOR_VERTEX);
  87    if (!shader)
  88       return NULL;
  89
  90    t_vpos = ureg_DECL_temporary(shader);
  91
  92    vrect = ureg_DECL_vs_input(shader, VS_I_RECT);
  93    vpos = ureg_DECL_vs_input(shader, VS_I_VPOS);
  94
  95    o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
  96    o_block = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_BLOCK);
  97    o_tex = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_TEX);
  98    o_start = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_START);
  99
 100    /*
 101     * scale = (BLOCK_WIDTH, BLOCK_HEIGHT) / (dst.width, dst.height)
 102     *
 103     * t_vpos = vpos + vrect
 104     * o_vpos.xy = t_vpos * scale
 105     * o_vpos.zw = vpos
 106     *
 107     * o_block = vrect
 108     * o_tex = t_pos
 109     * o_start = vpos * scale
 110     *
 111     */
 112    scale = ureg_imm2f(shader,
 113       (float)BLOCK_WIDTH / idct->buffer_width,
 114       (float)BLOCK_HEIGHT / idct->buffer_height);
 115
 116    ureg_ADD(shader, ureg_writemask(t_vpos, TGSI_WRITEMASK_XY), vpos, vrect);
 117    ureg_MUL(shader, ureg_writemask(t_vpos, TGSI_WRITEMASK_XY), ureg_src(t_vpos), scale);
 118    ureg_MOV(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_XY), ureg_src(t_vpos));
 119    ureg_MOV(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_ZW), vpos);
 120
 121    ureg_MOV(shader, ureg_writemask(o_block, TGSI_WRITEMASK_XY), vrect);
 122    ureg_MOV(shader, ureg_writemask(o_tex, TGSI_WRITEMASK_XY), ureg_src(t_vpos));
 123    ureg_MUL(shader, ureg_writemask(o_start, TGSI_WRITEMASK_XY), vpos, scale);
 124
 125    ureg_release_temporary(shader, t_vpos);
 126
 127    ureg_END(shader);
 128
 129    return ureg_create_shader_and_destroy(shader, idct->pipe);
 130 }
 131
 132 static void
 133 fetch_four(struct ureg_program *shader, struct ureg_dst m[2],
 134            struct ureg_src tc, struct ureg_src sampler,
 135            struct ureg_src start, struct ureg_src block,
 136            bool right_side, bool transposed, float size)
 137 {
 138    struct ureg_dst t_tc;
 139    unsigned wm_start = (right_side == transposed) ? TGSI_WRITEMASK_X : TGSI_WRITEMASK_Y;
 140    unsigned wm_tc = (right_side == transposed) ? TGSI_WRITEMASK_Y : TGSI_WRITEMASK_X;
 141
 142    t_tc = ureg_DECL_temporary(shader);
 143    m[0] = ureg_DECL_temporary(shader);
 144    m[1] = ureg_DECL_temporary(shader);
 145
 146    /*
 147     * t_tc.x = right_side ? start.x : tc.x
 148     * t_tc.y = right_side ? tc.y : start.y
 149     * m[0..1] = tex(t_tc++, sampler)
 150     */
 151    if(!right_side) {
 152       ureg_MOV(shader, ureg_writemask(t_tc, wm_start), ureg_scalar(start, TGSI_SWIZZLE_X));
 153       ureg_MOV(shader, ureg_writemask(t_tc, wm_tc), ureg_scalar(tc, TGSI_SWIZZLE_Y));
 154    } else {
 155       ureg_MOV(shader, ureg_writemask(t_tc, wm_start), ureg_scalar(start, TGSI_SWIZZLE_Y));
 156       ureg_MOV(shader, ureg_writemask(t_tc, wm_tc), ureg_scalar(tc, TGSI_SWIZZLE_X));
 157    }
 158
 159 #if NR_RENDER_TARGETS == 8
 160    ureg_MOV(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_Z), ureg_scalar(block, TGSI_SWIZZLE_X));
 161 #else
 162    ureg_MOV(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_Z), ureg_imm1f(shader, 0.0f));
 163 #endif
 164
 165    ureg_TEX(shader, m[0], TGSI_TEXTURE_3D, ureg_src(t_tc), sampler);
 166    ureg_ADD(shader, ureg_writemask(t_tc, wm_start), ureg_src(t_tc), ureg_imm1f(shader, 1.0f / size));
 167    ureg_TEX(shader, m[1], TGSI_TEXTURE_3D, ureg_src(t_tc), sampler);
 168
 169    ureg_release_temporary(shader, t_tc);
 170 }
 171
 172 static void
 173 matrix_mul(struct ureg_program *shader, struct ureg_dst dst, struct ureg_dst l[2], struct ureg_dst r[2])
 174 {
 175    struct ureg_dst tmp[2];
 176    unsigned i;
 177
 178    for(i = 0; i < 2; ++i) {
 179       tmp[i] = ureg_DECL_temporary(shader);
 180    }
 181
 182    /*
 183     * tmp[0..1] = dot4(m[0][0..1], m[1][0..1])
 184     * dst = tmp[0] + tmp[1]
 185     */
 186    ureg_DP4(shader, ureg_writemask(tmp[0], TGSI_WRITEMASK_X), ureg_src(l[0]), ureg_src(r[0]));
 187    ureg_DP4(shader, ureg_writemask(tmp[1], TGSI_WRITEMASK_X), ureg_src(l[1]), ureg_src(r[1]));
 188    ureg_ADD(shader, dst,
 189       ureg_scalar(ureg_src(tmp[0]), TGSI_SWIZZLE_X),
 190       ureg_scalar(ureg_src(tmp[1]), TGSI_SWIZZLE_X));
 191
 192    for(i = 0; i < 2; ++i) {
 193       ureg_release_temporary(shader, tmp[i]);
 194    }
 195 }
 196
 197 static void *
 198 create_transpose_frag_shader(struct vl_idct *idct)
 199 {
 200    struct ureg_program *shader;
 201
 202    struct ureg_src block, tex, sampler[2];
 203    struct ureg_src start[2];
 204
 205    struct ureg_dst l[2], r[2];
 206    struct ureg_dst tmp, fragment;
 207
 208    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 209    if (!shader)
 210       return NULL;
 211
 212    block = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_BLOCK, TGSI_INTERPOLATE_LINEAR);
 213    tex = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_TEX, TGSI_INTERPOLATE_CONSTANT);
 214
 215    sampler[0] = ureg_DECL_sampler(shader, 0);
 216    sampler[1] = ureg_DECL_sampler(shader, 1);
 217
 218    start[0] = ureg_imm1f(shader, 0.0f);
 219    start[1] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_START, TGSI_INTERPOLATE_CONSTANT);
 220
 221    fetch_four(shader, l, block, sampler[0], start[0], block, false, false, BLOCK_WIDTH / 4);
 222    fetch_four(shader, r, tex, sampler[1], start[1], block, true, false, idct->buffer_height / 4);
 223
 224    fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 225
 226    tmp = ureg_DECL_temporary(shader);
 227    matrix_mul(shader, ureg_writemask(tmp, TGSI_WRITEMASK_X), l, r);
 228    ureg_MUL(shader, fragment, ureg_src(tmp), ureg_imm1f(shader, STAGE2_SCALE));
 229
 230    ureg_release_temporary(shader, tmp);
 231    ureg_release_temporary(shader, l[0]);
 232    ureg_release_temporary(shader, l[1]);
 233    ureg_release_temporary(shader, r[0]);
 234    ureg_release_temporary(shader, r[1]);
 235
 236    ureg_END(shader);
 237
 238    return ureg_create_shader_and_destroy(shader, idct->pipe);
 239 }
 240
 241 static void *
 242 create_matrix_frag_shader(struct vl_idct *idct)
 243 {
 244    struct ureg_program *shader;
 245
 246    struct ureg_src tex, block, sampler[2];
 247    struct ureg_src start[2];
 248
 249    struct ureg_dst l[4][2], r[2];
 250    struct ureg_dst t_tc, tmp, fragment[NR_RENDER_TARGETS];
 251
 252    unsigned i, j;
 253
 254    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 255    if (!shader)
 256       return NULL;
 257
 258    t_tc = ureg_DECL_temporary(shader);
 259    tmp = ureg_DECL_temporary(shader);
 260
 261    tex = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_TEX, TGSI_INTERPOLATE_LINEAR);
 262    block = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_BLOCK, TGSI_INTERPOLATE_LINEAR);
 263
 264    sampler[0] = ureg_DECL_sampler(shader, 1);
 265    sampler[1] = ureg_DECL_sampler(shader, 0);
 266
 267    start[0] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_START, TGSI_INTERPOLATE_CONSTANT);
 268    start[1] = ureg_imm1f(shader, 0.0f);
 269
 270    for (i = 0; i < NR_RENDER_TARGETS; ++i)
 271        fragment[i] = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, i);
 272
 273    ureg_MOV(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_Y), tex);
 274    for (i = 0; i < 4; ++i) {
 275       fetch_four(shader, l[i], ureg_src(t_tc), sampler[0], start[0], block, false, false, idct->buffer_width / 4);
 276       ureg_MUL(shader, l[i][0], ureg_src(l[i][0]), ureg_imm1f(shader, STAGE1_SCALE));
 277       ureg_MUL(shader, l[i][1], ureg_src(l[i][1]), ureg_imm1f(shader, STAGE1_SCALE));
 278       if(i != 3)
 279          ureg_ADD(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_Y),
 280             ureg_src(t_tc), ureg_imm1f(shader, 1.0f / idct->buffer_height));
 281    }
 282
 283    for (i = 0; i < NR_RENDER_TARGETS; ++i) {
 284
 285 #if NR_RENDER_TARGETS == 8
 286       ureg_MOV(shader, ureg_writemask(t_tc, TGSI_WRITEMASK_X), ureg_imm1f(shader, 1.0f / BLOCK_WIDTH * i));
 287       fetch_four(shader, r, ureg_src(t_tc), sampler[1], start[1], block, true, true, BLOCK_WIDTH / 4);
 288 #elif NR_RENDER_TARGETS == 1
 289       fetch_four(shader, r, block, sampler[1], start[1], block, true, true, BLOCK_WIDTH / 4);
 290 #else
 291 #error invalid number of render targets
 292 #endif
 293
 294       for (j = 0; j < 4; ++j) {
 295          matrix_mul(shader, ureg_writemask(fragment[i], TGSI_WRITEMASK_X << j), l[j], r);
 296       }
 297       ureg_release_temporary(shader, r[0]);
 298       ureg_release_temporary(shader, r[1]);
 299    }
 300
 301    ureg_release_temporary(shader, t_tc);
 302    ureg_release_temporary(shader, tmp);
 303
 304    for (i = 0; i < 4; ++i) {
 305       ureg_release_temporary(shader, l[i][0]);
 306       ureg_release_temporary(shader, l[i][1]);
 307    }
 308
 309    ureg_END(shader);
 310
 311    return ureg_create_shader_and_destroy(shader, idct->pipe);
 312 }
 313
 314 static bool
 315 init_shaders(struct vl_idct *idct)
 316 {
 317    idct->vs = create_vert_shader(idct);
 318    idct->matrix_fs = create_matrix_frag_shader(idct);
 319    idct->transpose_fs = create_transpose_frag_shader(idct);
 320
 321    return
 322       idct->vs != NULL &&
 323       idct->transpose_fs != NULL &&
 324       idct->matrix_fs != NULL;
 325 }
 326
 327 static void
 328 cleanup_shaders(struct vl_idct *idct)
 329 {
 330    idct->pipe->delete_vs_state(idct->pipe, idct->vs);
 331    idct->pipe->delete_fs_state(idct->pipe, idct->matrix_fs);
 332    idct->pipe->delete_fs_state(idct->pipe, idct->transpose_fs);
 333 }
 334
 335 static bool
 336 init_state(struct vl_idct *idct)
 337 {
 338    struct pipe_vertex_element vertex_elems[NUM_VS_INPUTS];
 339    struct pipe_sampler_state sampler;
 340    struct pipe_rasterizer_state rs_state;
 341    unsigned i;
 342
 343    assert(idct);
 344
 345    idct->quad = vl_vb_upload_quads(idct->pipe, idct->max_blocks);
 346
 347    if(idct->quad.buffer == NULL)
 348       return false;
 349
 350    for (i = 0; i < 4; ++i) {
 351       memset(&sampler, 0, sizeof(sampler));
 352       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 353       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 354       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 355       sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 356       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 357       sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 358       sampler.compare_mode = PIPE_TEX_COMPARE_NONE;
 359       sampler.compare_func = PIPE_FUNC_ALWAYS;
 360       sampler.normalized_coords = 1;
 361       /*sampler.shadow_ambient = ; */
 362       /*sampler.lod_bias = ; */
 363       sampler.min_lod = 0;
 364       /*sampler.max_lod = ; */
 365       /*sampler.border_color[0] = ; */
 366       /*sampler.max_anisotropy = ; */
 367       idct->samplers.all[i] = idct->pipe->create_sampler_state(idct->pipe, &sampler);
 368    }
 369
 370    memset(&rs_state, 0, sizeof(rs_state));
 371    /*rs_state.sprite_coord_enable */
 372    rs_state.sprite_coord_mode = PIPE_SPRITE_COORD_UPPER_LEFT;
 373    rs_state.point_quad_rasterization = true;
 374    rs_state.point_size = BLOCK_WIDTH;
 375    rs_state.gl_rasterization_rules = false;
 376    idct->rs_state = idct->pipe->create_rasterizer_state(idct->pipe, &rs_state);
 377
 378    vertex_elems[VS_I_RECT] = vl_vb_get_quad_vertex_element();
 379
 380    /* Pos element */
 381    vertex_elems[VS_I_VPOS].src_format = PIPE_FORMAT_R32G32_FLOAT;
 382
 383    idct->vertex_buffer_stride = vl_vb_element_helper(&vertex_elems[VS_I_VPOS], 1, 1);
 384    idct->vertex_elems_state = idct->pipe->create_vertex_elements_state(idct->pipe, 2, vertex_elems);
 385
 386    return true;
 387 }
 388
 389 static void
 390 cleanup_state(struct vl_idct *idct)
 391 {
 392    unsigned i;
 393
 394    for (i = 0; i < 4; ++i)
 395       idct->pipe->delete_sampler_state(idct->pipe, idct->samplers.all[i]);
 396
 397    idct->pipe->delete_rasterizer_state(idct->pipe, idct->rs_state);
 398    idct->pipe->delete_vertex_elements_state(idct->pipe, idct->vertex_elems_state);
 399 }
 400
 401 static bool
 402 init_textures(struct vl_idct *idct, struct vl_idct_buffer *buffer)
 403 {
 404    struct pipe_resource template;
 405    struct pipe_sampler_view sampler_view;
 406    unsigned i;
 407
 408    assert(idct && buffer);
 409
 410    /* create textures */
 411    memset(&template, 0, sizeof(struct pipe_resource));
 412    template.last_level = 0;
 413    template.depth0 = 1;
 414    template.bind = PIPE_BIND_SAMPLER_VIEW;
 415    template.flags = 0;
 416
 417    template.target = PIPE_TEXTURE_2D;
 418    template.format = PIPE_FORMAT_R16G16B16A16_SNORM;
 419    template.width0 = idct->buffer_width / 4;
 420    template.height0 = idct->buffer_height;
 421    template.depth0 = 1;
 422    template.usage = PIPE_USAGE_STREAM;
 423    buffer->textures.individual.source = idct->pipe->screen->resource_create(idct->pipe->screen, &template);
 424
 425    template.target = PIPE_TEXTURE_3D;
 426    template.format = PIPE_FORMAT_R16G16B16A16_SNORM;
 427    template.width0 = idct->buffer_width / NR_RENDER_TARGETS;
 428    template.height0 = idct->buffer_height / 4;
 429    template.depth0 = NR_RENDER_TARGETS;
 430    template.usage = PIPE_USAGE_STATIC;
 431    buffer->textures.individual.intermediate = idct->pipe->screen->resource_create(idct->pipe->screen, &template);
 432
 433    for (i = 0; i < 4; ++i) {
 434       if(buffer->textures.all[i] == NULL)
 435          return false; /* a texture failed to allocate */
 436
 437       u_sampler_view_default_template(&sampler_view, buffer->textures.all[i], buffer->textures.all[i]->format);
 438       buffer->sampler_views.all[i] = idct->pipe->create_sampler_view(idct->pipe, buffer->textures.all[i], &sampler_view);
 439    }
 440
 441    return true;
 442 }
 443
 444 static void
 445 cleanup_textures(struct vl_idct *idct, struct vl_idct_buffer *buffer)
 446 {
 447    unsigned i;
 448
 449    assert(idct && buffer);
 450
 451    for (i = 0; i < 4; ++i) {
 452       pipe_sampler_view_reference(&buffer->sampler_views.all[i], NULL);
 453       pipe_resource_reference(&buffer->textures.all[i], NULL);
 454    }
 455 }
 456
 457 static bool
 458 init_vertex_buffers(struct vl_idct *idct, struct vl_idct_buffer *buffer)
 459 {
 460    assert(idct && buffer);
 461
 462    buffer->vertex_bufs.individual.quad.stride = idct->quad.stride;
 463    buffer->vertex_bufs.individual.quad.max_index = idct->quad.max_index;
 464    buffer->vertex_bufs.individual.quad.buffer_offset = idct->quad.buffer_offset;
 465    pipe_resource_reference(&buffer->vertex_bufs.individual.quad.buffer, idct->quad.buffer);
 466
 467    buffer->vertex_bufs.individual.pos = vl_vb_init(
 468       &buffer->blocks, idct->pipe, idct->max_blocks, 2,
 469       idct->vertex_buffer_stride);
 470
 471    if(buffer->vertex_bufs.individual.pos.buffer == NULL)
 472       return false;
 473
 474    return true;
 475 }
 476
 477 static void
 478 cleanup_vertex_buffers(struct vl_idct *idct, struct vl_idct_buffer *buffer)
 479 {
 480    assert(idct && buffer);
 481
 482    pipe_resource_reference(&buffer->vertex_bufs.individual.quad.buffer, NULL);
 483    pipe_resource_reference(&buffer->vertex_bufs.individual.pos.buffer, NULL);
 484
 485    vl_vb_cleanup(&buffer->blocks);
 486 }
 487
 488 struct pipe_resource *
 489 vl_idct_upload_matrix(struct pipe_context *pipe)
 490 {
 491    struct pipe_resource template, *matrix;
 492    struct pipe_transfer *buf_transfer;
 493    unsigned i, j, pitch;
 494    float *f;
 495
 496    struct pipe_box rect =
 497    {
 498       0, 0, 0,
 499       BLOCK_WIDTH / 4,
 500       BLOCK_HEIGHT,
 501       1
 502    };
 503
 504    memset(&template, 0, sizeof(struct pipe_resource));
 505    template.target = PIPE_TEXTURE_2D;
 506    template.format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 507    template.last_level = 0;
 508    template.width0 = 2;
 509    template.height0 = 8;
 510    template.depth0 = 1;
 511    template.usage = PIPE_USAGE_IMMUTABLE;
 512    template.bind = PIPE_BIND_SAMPLER_VIEW;
 513    template.flags = 0;
 514
 515    matrix = pipe->screen->resource_create(pipe->screen, &template);
 516
 517    /* matrix */
 518    buf_transfer = pipe->get_transfer
 519    (
 520       pipe, matrix,
 521       u_subresource(0, 0),
 522       PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD,
 523       &rect
 524    );
 525    pitch = buf_transfer->stride / sizeof(float);
 526
 527    f = pipe->transfer_map(pipe, buf_transfer);
 528    for(i = 0; i < BLOCK_HEIGHT; ++i)
 529       for(j = 0; j < BLOCK_WIDTH; ++j)
 530          f[i * pitch + j] = const_matrix[j][i]; // transpose
 531
 532    pipe->transfer_unmap(pipe, buf_transfer);
 533    pipe->transfer_destroy(pipe, buf_transfer);
 534
 535    return matrix;
 536 }
 537
 538 bool vl_idct_init(struct vl_idct *idct, struct pipe_context *pipe,
 539                   unsigned buffer_width, unsigned buffer_height,
 540                   struct pipe_resource *matrix)
 541 {
 542    assert(idct && pipe && matrix);
 543
 544    idct->pipe = pipe;
 545    idct->buffer_width = buffer_width;
 546    idct->buffer_height = buffer_height;
 547    pipe_resource_reference(&idct->matrix, matrix);
 548
 549    idct->max_blocks =
 550       align(buffer_width, BLOCK_WIDTH) / BLOCK_WIDTH *
 551       align(buffer_height, BLOCK_HEIGHT) / BLOCK_HEIGHT;
 552
 553    if(!init_shaders(idct))
 554       return false;
 555
 556    if(!init_state(idct)) {
 557       cleanup_shaders(idct);
 558       return false;
 559    }
 560
 561    return true;
 562 }
 563
 564 void
 565 vl_idct_cleanup(struct vl_idct *idct)
 566 {
 567    cleanup_shaders(idct);
 568    cleanup_state(idct);
 569
 570    pipe_resource_reference(&idct->matrix, NULL);
 571 }
 572
 573 bool
 574 vl_idct_init_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer, struct pipe_resource *dst)
 575 {
 576    unsigned i;
 577
 578    assert(buffer);
 579    assert(idct);
 580    assert(dst);
 581
 582    pipe_resource_reference(&buffer->textures.individual.matrix, idct->matrix);
 583    pipe_resource_reference(&buffer->textures.individual.transpose, idct->matrix);
 584    pipe_resource_reference(&buffer->destination, dst);
 585
 586    if (!init_textures(idct, buffer))
 587       return false;
 588
 589    if (!init_vertex_buffers(idct, buffer))
 590       return false;
 591
 592    /* init state */
 593    buffer->viewport[0].scale[0] = buffer->textures.individual.intermediate->width0;
 594    buffer->viewport[0].scale[1] = buffer->textures.individual.intermediate->height0;
 595
 596    buffer->viewport[1].scale[0] = buffer->destination->width0;
 597    buffer->viewport[1].scale[1] = buffer->destination->height0;
 598
 599    buffer->fb_state[0].width = buffer->textures.individual.intermediate->width0;
 600    buffer->fb_state[0].height = buffer->textures.individual.intermediate->height0;
 601
 602    buffer->fb_state[0].nr_cbufs = NR_RENDER_TARGETS;
 603    for(i = 0; i < NR_RENDER_TARGETS; ++i) {
 604       buffer->fb_state[0].cbufs[i] = idct->pipe->screen->get_tex_surface(
 605          idct->pipe->screen, buffer->textures.individual.intermediate, 0, 0, i,
 606          PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET);
 607    }
 608
 609    buffer->fb_state[1].width = buffer->destination->width0;
 610    buffer->fb_state[1].height = buffer->destination->height0;
 611
 612    buffer->fb_state[1].nr_cbufs = 1;
 613    buffer->fb_state[1].cbufs[0] = idct->pipe->screen->get_tex_surface(
 614       idct->pipe->screen, buffer->destination, 0, 0, 0,
 615       PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET);
 616
 617    for(i = 0; i < 2; ++i) {
 618       buffer->viewport[i].scale[2] = 1;
 619       buffer->viewport[i].scale[3] = 1;
 620       buffer->viewport[i].translate[0] = 0;
 621       buffer->viewport[i].translate[1] = 0;
 622       buffer->viewport[i].translate[2] = 0;
 623       buffer->viewport[i].translate[3] = 0;
 624
 625       buffer->fb_state[i].zsbuf = NULL;
 626    }
 627
 628    return true;
 629 }
 630
 631 void
 632 vl_idct_cleanup_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer)
 633 {
 634    unsigned i;
 635
 636    assert(buffer);
 637
 638    for(i = 0; i < NR_RENDER_TARGETS; ++i) {
 639       idct->pipe->screen->tex_surface_destroy(buffer->fb_state[0].cbufs[i]);
 640    }
 641
 642    idct->pipe->screen->tex_surface_destroy(buffer->fb_state[1].cbufs[0]);
 643
 644    cleanup_textures(idct, buffer);
 645    cleanup_vertex_buffers(idct, buffer);
 646 }
 647
 648 void
 649 vl_idct_map_buffers(struct vl_idct *idct, struct vl_idct_buffer *buffer)
 650 {
 651    assert(idct);
 652
 653    struct pipe_box rect =
 654    {
 655       0, 0, 0,
 656       buffer->textures.individual.source->width0,
 657       buffer->textures.individual.source->height0,
 658       1
 659    };
 660
 661    buffer->tex_transfer = idct->pipe->get_transfer
 662    (
 663       idct->pipe, buffer->textures.individual.source,
 664       u_subresource(0, 0),
 665       PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD,
 666       &rect
 667    );
 668
 669    buffer->texels = idct->pipe->transfer_map(idct->pipe, buffer->tex_transfer);
 670
 671    vl_vb_map(&buffer->blocks, idct->pipe);
 672 }
 673
 674 void
 675 vl_idct_add_block(struct vl_idct_buffer *buffer, unsigned x, unsigned y, short *block)
 676 {
 677    struct vertex2f v;
 678    unsigned tex_pitch;
 679    short *texels;
 680
 681    unsigned i;
 682
 683    assert(buffer);
 684
 685    tex_pitch = buffer->tex_transfer->stride / sizeof(short);
 686    texels = buffer->texels + y * tex_pitch * BLOCK_HEIGHT + x * BLOCK_WIDTH;
 687
 688    for (i = 0; i < BLOCK_HEIGHT; ++i)
 689       memcpy(texels + i * tex_pitch, block + i * BLOCK_WIDTH, BLOCK_WIDTH * sizeof(short));
 690
 691    v.x = x;
 692    v.y = y;
 693    vl_vb_add_block(&buffer->blocks, (float*)&v);
 694 }
 695
 696 void
 697 vl_idct_unmap_buffers(struct vl_idct *idct, struct vl_idct_buffer *buffer)
 698 {
 699    assert(idct && buffer);
 700
 701    idct->pipe->transfer_unmap(idct->pipe, buffer->tex_transfer);
 702    idct->pipe->transfer_destroy(idct->pipe, buffer->tex_transfer);
 703    vl_vb_unmap(&buffer->blocks, idct->pipe);
 704 }
 705
 706 void
 707 vl_idct_flush(struct vl_idct *idct, struct vl_idct_buffer *buffer)
 708 {
 709    unsigned num_verts;
 710
 711    assert(idct);
 712
 713    num_verts = vl_vb_restart(&buffer->blocks);
 714
 715    if(num_verts > 0) {
 716
 717       idct->pipe->bind_rasterizer_state(idct->pipe, idct->rs_state);
 718       idct->pipe->set_vertex_buffers(idct->pipe, 2, buffer->vertex_bufs.all);
 719       idct->pipe->bind_vertex_elements_state(idct->pipe, idct->vertex_elems_state);
 720       idct->pipe->bind_vs_state(idct->pipe, idct->vs);
 721
 722       /* first stage */
 723       idct->pipe->set_framebuffer_state(idct->pipe, &buffer->fb_state[0]);
 724       idct->pipe->set_viewport_state(idct->pipe, &buffer->viewport[0]);
 725       idct->pipe->set_fragment_sampler_views(idct->pipe, 2, buffer->sampler_views.stage[0]);
 726       idct->pipe->bind_fragment_sampler_states(idct->pipe, 2, idct->samplers.stage[0]);
 727       idct->pipe->bind_fs_state(idct->pipe, idct->matrix_fs);
 728       util_draw_arrays(idct->pipe, PIPE_PRIM_QUADS, 0, num_verts);
 729
 730       /* second stage */
 731       idct->pipe->set_framebuffer_state(idct->pipe, &buffer->fb_state[1]);
 732       idct->pipe->set_viewport_state(idct->pipe, &buffer->viewport[1]);
 733       idct->pipe->set_fragment_sampler_views(idct->pipe, 2, buffer->sampler_views.stage[1]);
 734       idct->pipe->bind_fragment_sampler_states(idct->pipe, 2, idct->samplers.stage[1]);
 735       idct->pipe->bind_fs_state(idct->pipe, idct->transpose_fs);
 736       util_draw_arrays(idct->pipe, PIPE_PRIM_QUADS, 0, num_verts);
 737    }
 738 }