src/gallium/auxiliary/vl/vl_compositor.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 Younes Manton.
   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 <assert.h>
  29
  30 #include "pipe/p_compiler.h"
  31 #include "pipe/p_context.h"
  32
  33 #include "util/u_memory.h"
  34 #include "util/u_draw.h"
  35 #include "util/u_surface.h"
  36
  37 #include "tgsi/tgsi_ureg.h"
  38
  39 #include "vl_csc.h"
  40 #include "vl_types.h"
  41 #include "vl_compositor.h"
  42
  43 #define MIN_DIRTY (0)
  44 #define MAX_DIRTY (1 << 15)
  45
  46 enum VS_OUTPUT
  47 {
  48    VS_O_VPOS = 0,
  49    VS_O_COLOR = 0,
  50    VS_O_VTEX = 0,
  51    VS_O_VTOP,
  52    VS_O_VBOTTOM,
  53 };
  54
  55 static void *
  56 create_vert_shader(struct vl_compositor *c)
  57 {
  58    struct ureg_program *shader;
  59    struct ureg_src vpos, vtex, color;
  60    struct ureg_dst tmp;
  61    struct ureg_dst o_vpos, o_vtex, o_color;
  62    struct ureg_dst o_vtop, o_vbottom;
  63
  64    shader = ureg_create(TGSI_PROCESSOR_VERTEX);
  65    if (!shader)
  66       return false;
  67
  68    vpos = ureg_DECL_vs_input(shader, 0);
  69    vtex = ureg_DECL_vs_input(shader, 1);
  70    color = ureg_DECL_vs_input(shader, 2);
  71    tmp = ureg_DECL_temporary(shader);
  72    o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
  73    o_color = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, VS_O_COLOR);
  74    o_vtex = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX);
  75    o_vtop = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTOP);
  76    o_vbottom = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VBOTTOM);
  77
  78    /*
  79     * o_vpos = vpos
  80     * o_vtex = vtex
  81     * o_color = color
  82     */
  83    ureg_MOV(shader, o_vpos, vpos);
  84    ureg_MOV(shader, o_vtex, vtex);
  85    ureg_MOV(shader, o_color, color);
  86
  87    /*
  88     * tmp.x = vtex.w / 2
  89     * tmp.y = vtex.w / 4
  90     *
  91     * o_vtop.x = vtex.x
  92     * o_vtop.y = vtex.y * tmp.x + 0.25f
  93     * o_vtop.z = vtex.y * tmp.y + 0.25f
  94     * o_vtop.w = 1 / tmp.x
  95     *
  96     * o_vbottom.x = vtex.x
  97     * o_vbottom.y = vtex.y * tmp.x - 0.25f
  98     * o_vbottom.z = vtex.y * tmp.y - 0.25f
  99     * o_vbottom.w = 1 / tmp.y
 100     */
 101    ureg_MUL(shader, ureg_writemask(tmp, TGSI_WRITEMASK_X),
 102             ureg_scalar(vtex, TGSI_SWIZZLE_W), ureg_imm1f(shader, 0.5f));
 103    ureg_MUL(shader, ureg_writemask(tmp, TGSI_WRITEMASK_Y),
 104             ureg_scalar(vtex, TGSI_SWIZZLE_W), ureg_imm1f(shader, 0.25f));
 105
 106    ureg_MOV(shader, ureg_writemask(o_vtop, TGSI_WRITEMASK_X), vtex);
 107    ureg_MAD(shader, ureg_writemask(o_vtop, TGSI_WRITEMASK_Y), ureg_scalar(vtex, TGSI_SWIZZLE_Y),
 108             ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_X), ureg_imm1f(shader, 0.25f));
 109    ureg_MAD(shader, ureg_writemask(o_vtop, TGSI_WRITEMASK_Z), ureg_scalar(vtex, TGSI_SWIZZLE_Y),
 110             ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_Y), ureg_imm1f(shader, 0.25f));
 111    ureg_RCP(shader, ureg_writemask(o_vtop, TGSI_WRITEMASK_W),
 112             ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_X));
 113
 114    ureg_MOV(shader, ureg_writemask(o_vbottom, TGSI_WRITEMASK_X), vtex);
 115    ureg_MAD(shader, ureg_writemask(o_vbottom, TGSI_WRITEMASK_Y), ureg_scalar(vtex, TGSI_SWIZZLE_Y),
 116             ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_X), ureg_imm1f(shader, -0.25f));
 117    ureg_MAD(shader, ureg_writemask(o_vbottom, TGSI_WRITEMASK_Z), ureg_scalar(vtex, TGSI_SWIZZLE_Y),
 118             ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_Y), ureg_imm1f(shader, -0.25f));
 119    ureg_RCP(shader, ureg_writemask(o_vbottom, TGSI_WRITEMASK_W),
 120             ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_Y));
 121
 122    ureg_END(shader);
 123
 124    return ureg_create_shader_and_destroy(shader, c->pipe);
 125 }
 126
 127 static void *
 128 create_frag_shader_video_buffer(struct vl_compositor *c)
 129 {
 130    struct ureg_program *shader;
 131    struct ureg_src tc;
 132    struct ureg_src csc[3];
 133    struct ureg_src sampler[3];
 134    struct ureg_dst texel;
 135    struct ureg_dst fragment;
 136    unsigned i;
 137
 138    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 139    if (!shader)
 140       return false;
 141
 142    tc = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
 143    for (i = 0; i < 3; ++i) {
 144       csc[i] = ureg_DECL_constant(shader, i);
 145       sampler[i] = ureg_DECL_sampler(shader, i);
 146    }
 147    texel = ureg_DECL_temporary(shader);
 148    fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 149
 150    /*
 151     * texel.xyz = tex(tc, sampler[i])
 152     * fragment = csc * texel
 153     */
 154    for (i = 0; i < 3; ++i)
 155       ureg_TEX(shader, ureg_writemask(texel, TGSI_WRITEMASK_X << i), TGSI_TEXTURE_3D, tc, sampler[i]);
 156
 157    ureg_MOV(shader, ureg_writemask(texel, TGSI_WRITEMASK_W), ureg_imm1f(shader, 1.0f));
 158
 159    for (i = 0; i < 3; ++i)
 160       ureg_DP4(shader, ureg_writemask(fragment, TGSI_WRITEMASK_X << i), csc[i], ureg_src(texel));
 161
 162    ureg_MOV(shader, ureg_writemask(fragment, TGSI_WRITEMASK_W), ureg_imm1f(shader, 1.0f));
 163
 164    ureg_release_temporary(shader, texel);
 165    ureg_END(shader);
 166
 167    return ureg_create_shader_and_destroy(shader, c->pipe);
 168 }
 169
 170 static void *
 171 create_frag_shader_weave(struct vl_compositor *c)
 172 {
 173    struct ureg_program *shader;
 174    struct ureg_src i_tc[2];
 175    struct ureg_src csc[3];
 176    struct ureg_src sampler[3];
 177    struct ureg_dst t_tc[2];
 178    struct ureg_dst t_texel[2];
 179    struct ureg_dst o_fragment;
 180    unsigned i, j;
 181
 182    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 183    if (!shader)
 184       return false;
 185
 186    i_tc[0] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTOP, TGSI_INTERPOLATE_LINEAR);
 187    i_tc[1] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VBOTTOM, TGSI_INTERPOLATE_LINEAR);
 188
 189    for (i = 0; i < 3; ++i) {
 190       csc[i] = ureg_DECL_constant(shader, i);
 191       sampler[i] = ureg_DECL_sampler(shader, i);
 192    }
 193
 194    for (i = 0; i < 2; ++i) {
 195       t_tc[i] = ureg_DECL_temporary(shader);
 196       t_texel[i] = ureg_DECL_temporary(shader);
 197    }
 198    o_fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 199
 200    /* calculate the texture offsets
 201     * t_tc.x = i_tc.x
 202     * t_tc.y = (round(i_tc.y) + 0.5) / height * 2
 203     */
 204    for (i = 0; i < 2; ++i) {
 205       ureg_MOV(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_X), i_tc[i]);
 206       ureg_ROUND(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_YZ), i_tc[i]);
 207       ureg_MOV(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_W),
 208                ureg_imm1f(shader, i ? 0.75f : 0.25f));
 209       ureg_ADD(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_YZ),
 210                ureg_src(t_tc[i]), ureg_imm1f(shader, 0.5f));
 211       ureg_MUL(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_Y),
 212                ureg_src(t_tc[i]), ureg_scalar(i_tc[0], TGSI_SWIZZLE_W));
 213       ureg_MUL(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_Z),
 214                ureg_src(t_tc[i]), ureg_scalar(i_tc[1], TGSI_SWIZZLE_W));
 215    }
 216
 217    /* fetch the texels
 218     * texel[0..1].x = tex(t_tc[0..1][0])
 219     * texel[0..1].y = tex(t_tc[0..1][1])
 220     * texel[0..1].z = tex(t_tc[0..1][2])
 221     */
 222    for (i = 0; i < 2; ++i)
 223       for (j = 0; j < 3; ++j) {
 224          struct ureg_src src = ureg_swizzle(ureg_src(t_tc[i]),
 225             TGSI_SWIZZLE_X, j ? TGSI_SWIZZLE_Z : TGSI_SWIZZLE_Y, TGSI_SWIZZLE_W, TGSI_SWIZZLE_W);
 226
 227          ureg_TEX(shader, ureg_writemask(t_texel[i], TGSI_WRITEMASK_X << j),
 228                   TGSI_TEXTURE_3D, src, sampler[j]);
 229       }
 230
 231    /* calculate linear interpolation factor
 232     * factor = |round(i_tc.y) - i_tc.y| * 2
 233     */
 234    ureg_ROUND(shader, ureg_writemask(t_tc[0], TGSI_WRITEMASK_YZ), i_tc[0]);
 235    ureg_ADD(shader, ureg_writemask(t_tc[0], TGSI_WRITEMASK_YZ),
 236             ureg_src(t_tc[0]), ureg_negate(i_tc[0]));
 237    ureg_MUL(shader, ureg_writemask(t_tc[0], TGSI_WRITEMASK_XY),
 238             ureg_abs(ureg_src(t_tc[0])), ureg_imm1f(shader, 2.0f));
 239    ureg_LRP(shader, t_texel[0], ureg_swizzle(ureg_src(t_tc[0]),
 240             TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z),
 241             ureg_src(t_texel[1]), ureg_src(t_texel[0]));
 242
 243    /* and finally do colour space transformation
 244     * fragment = csc * texel
 245     */
 246    ureg_MOV(shader, ureg_writemask(t_texel[0], TGSI_WRITEMASK_W), ureg_imm1f(shader, 1.0f));
 247    for (i = 0; i < 3; ++i)
 248       ureg_DP4(shader, ureg_writemask(o_fragment, TGSI_WRITEMASK_X << i), csc[i], ureg_src(t_texel[0]));
 249
 250    ureg_MOV(shader, ureg_writemask(o_fragment, TGSI_WRITEMASK_W), ureg_imm1f(shader, 1.0f));
 251
 252    for (i = 0; i < 2; ++i) {
 253       ureg_release_temporary(shader, t_texel[i]);
 254       ureg_release_temporary(shader, t_tc[i]);
 255    }
 256
 257    ureg_END(shader);
 258
 259    return ureg_create_shader_and_destroy(shader, c->pipe);
 260 }
 261
 262 static void *
 263 create_frag_shader_palette(struct vl_compositor *c, bool include_cc)
 264 {
 265    struct ureg_program *shader;
 266    struct ureg_src csc[3];
 267    struct ureg_src tc;
 268    struct ureg_src sampler;
 269    struct ureg_src palette;
 270    struct ureg_dst texel;
 271    struct ureg_dst fragment;
 272    unsigned i;
 273
 274    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 275    if (!shader)
 276       return false;
 277
 278    for (i = 0; include_cc && i < 3; ++i)
 279       csc[i] = ureg_DECL_constant(shader, i);
 280
 281    tc = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
 282    sampler = ureg_DECL_sampler(shader, 0);
 283    palette = ureg_DECL_sampler(shader, 1);
 284
 285    texel = ureg_DECL_temporary(shader);
 286    fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 287
 288    /*
 289     * texel = tex(tc, sampler)
 290     * fragment.xyz = tex(texel, palette) * csc
 291     * fragment.a = texel.a
 292     */
 293    ureg_TEX(shader, texel, TGSI_TEXTURE_2D, tc, sampler);
 294    ureg_MOV(shader, ureg_writemask(fragment, TGSI_WRITEMASK_W), ureg_src(texel));
 295
 296    if (include_cc) {
 297       ureg_TEX(shader, texel, TGSI_TEXTURE_1D, ureg_src(texel), palette);
 298       for (i = 0; i < 3; ++i)
 299          ureg_DP4(shader, ureg_writemask(fragment, TGSI_WRITEMASK_X << i), csc[i], ureg_src(texel));
 300    } else {
 301       ureg_TEX(shader, ureg_writemask(fragment, TGSI_WRITEMASK_XYZ),
 302                TGSI_TEXTURE_1D, ureg_src(texel), palette);
 303    }
 304
 305    ureg_release_temporary(shader, texel);
 306    ureg_END(shader);
 307
 308    return ureg_create_shader_and_destroy(shader, c->pipe);
 309 }
 310
 311 static void *
 312 create_frag_shader_rgba(struct vl_compositor *c)
 313 {
 314    struct ureg_program *shader;
 315    struct ureg_src tc, color, sampler;
 316    struct ureg_dst texel, fragment;
 317
 318    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 319    if (!shader)
 320       return false;
 321
 322    tc = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
 323    color = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_COLOR, VS_O_COLOR, TGSI_INTERPOLATE_LINEAR);
 324    sampler = ureg_DECL_sampler(shader, 0);
 325    texel = ureg_DECL_temporary(shader);
 326    fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 327
 328    /*
 329     * fragment = tex(tc, sampler)
 330     */
 331    ureg_TEX(shader, texel, TGSI_TEXTURE_2D, tc, sampler);
 332    ureg_MUL(shader, fragment, ureg_src(texel), color);
 333    ureg_END(shader);
 334
 335    return ureg_create_shader_and_destroy(shader, c->pipe);
 336 }
 337
 338 static bool
 339 init_shaders(struct vl_compositor *c)
 340 {
 341    assert(c);
 342
 343    c->vs = create_vert_shader(c);
 344    if (!c->vs) {
 345       debug_printf("Unable to create vertex shader.\n");
 346       return false;
 347    }
 348
 349    c->fs_video_buffer = create_frag_shader_video_buffer(c);
 350    if (!c->fs_video_buffer) {
 351       debug_printf("Unable to create YCbCr-to-RGB fragment shader.\n");
 352       return false;
 353    }
 354
 355    c->fs_weave = create_frag_shader_weave(c);
 356    if (!c->fs_weave) {
 357       debug_printf("Unable to create YCbCr-to-RGB weave fragment shader.\n");
 358       return false;
 359    }
 360
 361    c->fs_palette.yuv = create_frag_shader_palette(c, true);
 362    if (!c->fs_palette.yuv) {
 363       debug_printf("Unable to create YUV-Palette-to-RGB fragment shader.\n");
 364       return false;
 365    }
 366
 367    c->fs_palette.rgb = create_frag_shader_palette(c, false);
 368    if (!c->fs_palette.rgb) {
 369       debug_printf("Unable to create RGB-Palette-to-RGB fragment shader.\n");
 370       return false;
 371    }
 372
 373    c->fs_rgba = create_frag_shader_rgba(c);
 374    if (!c->fs_rgba) {
 375       debug_printf("Unable to create RGB-to-RGB fragment shader.\n");
 376       return false;
 377    }
 378
 379    return true;
 380 }
 381
 382 static void cleanup_shaders(struct vl_compositor *c)
 383 {
 384    assert(c);
 385
 386    c->pipe->delete_vs_state(c->pipe, c->vs);
 387    c->pipe->delete_fs_state(c->pipe, c->fs_video_buffer);
 388    c->pipe->delete_fs_state(c->pipe, c->fs_weave);
 389    c->pipe->delete_fs_state(c->pipe, c->fs_palette.yuv);
 390    c->pipe->delete_fs_state(c->pipe, c->fs_palette.rgb);
 391    c->pipe->delete_fs_state(c->pipe, c->fs_rgba);
 392 }
 393
 394 static bool
 395 init_pipe_state(struct vl_compositor *c)
 396 {
 397    struct pipe_rasterizer_state rast;
 398    struct pipe_sampler_state sampler;
 399    struct pipe_blend_state blend;
 400    struct pipe_depth_stencil_alpha_state dsa;
 401    unsigned i;
 402
 403    assert(c);
 404
 405    c->fb_state.nr_cbufs = 1;
 406    c->fb_state.zsbuf = NULL;
 407
 408    memset(&sampler, 0, sizeof(sampler));
 409    sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 410    sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 411    sampler.wrap_r = PIPE_TEX_WRAP_REPEAT;
 412    sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR;
 413    sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 414    sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR;
 415    sampler.compare_mode = PIPE_TEX_COMPARE_NONE;
 416    sampler.compare_func = PIPE_FUNC_ALWAYS;
 417    sampler.normalized_coords = 1;
 418
 419    c->sampler_linear = c->pipe->create_sampler_state(c->pipe, &sampler);
 420
 421    sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 422    sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 423    c->sampler_nearest = c->pipe->create_sampler_state(c->pipe, &sampler);
 424
 425    memset(&blend, 0, sizeof blend);
 426    blend.independent_blend_enable = 0;
 427    blend.rt[0].blend_enable = 0;
 428    blend.logicop_enable = 0;
 429    blend.logicop_func = PIPE_LOGICOP_CLEAR;
 430    blend.rt[0].colormask = PIPE_MASK_RGBA;
 431    blend.dither = 0;
 432    c->blend_clear = c->pipe->create_blend_state(c->pipe, &blend);
 433
 434    blend.rt[0].blend_enable = 1;
 435    blend.rt[0].rgb_func = PIPE_BLEND_ADD;
 436    blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_SRC_ALPHA;
 437    blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_INV_SRC_ALPHA;
 438    blend.rt[0].alpha_func = PIPE_BLEND_ADD;
 439    blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 440    blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
 441    c->blend_add = c->pipe->create_blend_state(c->pipe, &blend);
 442
 443    memset(&rast, 0, sizeof rast);
 444    rast.flatshade = 0;
 445    rast.front_ccw = 1;
 446    rast.cull_face = PIPE_FACE_NONE;
 447    rast.fill_back = PIPE_POLYGON_MODE_FILL;
 448    rast.fill_front = PIPE_POLYGON_MODE_FILL;
 449    rast.scissor = 1;
 450    rast.line_width = 1;
 451    rast.point_size_per_vertex = 1;
 452    rast.offset_units = 1;
 453    rast.offset_scale = 1;
 454    rast.gl_rasterization_rules = 1;
 455    rast.depth_clip = 1;
 456
 457    c->rast = c->pipe->create_rasterizer_state(c->pipe, &rast);
 458
 459    memset(&dsa, 0, sizeof dsa);
 460    dsa.depth.enabled = 0;
 461    dsa.depth.writemask = 0;
 462    dsa.depth.func = PIPE_FUNC_ALWAYS;
 463    for (i = 0; i < 2; ++i) {
 464       dsa.stencil[i].enabled = 0;
 465       dsa.stencil[i].func = PIPE_FUNC_ALWAYS;
 466       dsa.stencil[i].fail_op = PIPE_STENCIL_OP_KEEP;
 467       dsa.stencil[i].zpass_op = PIPE_STENCIL_OP_KEEP;
 468       dsa.stencil[i].zfail_op = PIPE_STENCIL_OP_KEEP;
 469       dsa.stencil[i].valuemask = 0;
 470       dsa.stencil[i].writemask = 0;
 471    }
 472    dsa.alpha.enabled = 0;
 473    dsa.alpha.func = PIPE_FUNC_ALWAYS;
 474    dsa.alpha.ref_value = 0;
 475    c->dsa = c->pipe->create_depth_stencil_alpha_state(c->pipe, &dsa);
 476    c->pipe->bind_depth_stencil_alpha_state(c->pipe, c->dsa);
 477
 478    return true;
 479 }
 480
 481 static void cleanup_pipe_state(struct vl_compositor *c)
 482 {
 483    assert(c);
 484
 485    /* Asserted in softpipe_delete_fs_state() for some reason */
 486    c->pipe->bind_vs_state(c->pipe, NULL);
 487    c->pipe->bind_fs_state(c->pipe, NULL);
 488
 489    c->pipe->delete_depth_stencil_alpha_state(c->pipe, c->dsa);
 490    c->pipe->delete_sampler_state(c->pipe, c->sampler_linear);
 491    c->pipe->delete_sampler_state(c->pipe, c->sampler_nearest);
 492    c->pipe->delete_blend_state(c->pipe, c->blend_clear);
 493    c->pipe->delete_blend_state(c->pipe, c->blend_add);
 494    c->pipe->delete_rasterizer_state(c->pipe, c->rast);
 495 }
 496
 497 static bool
 498 create_vertex_buffer(struct vl_compositor *c)
 499 {
 500    assert(c);
 501
 502    pipe_resource_reference(&c->vertex_buf.buffer, NULL);
 503    c->vertex_buf.buffer = pipe_buffer_create
 504    (
 505       c->pipe->screen,
 506       PIPE_BIND_VERTEX_BUFFER,
 507       PIPE_USAGE_STREAM,
 508       c->vertex_buf.stride * VL_COMPOSITOR_MAX_LAYERS * 4
 509    );
 510
 511    return c->vertex_buf.buffer != NULL;
 512 }
 513
 514 static bool
 515 init_buffers(struct vl_compositor *c)
 516 {
 517    struct pipe_vertex_element vertex_elems[3];
 518
 519    assert(c);
 520
 521    /*
 522     * Create our vertex buffer and vertex buffer elements
 523     */
 524    c->vertex_buf.stride = sizeof(struct vertex2f) + sizeof(struct vertex4f) * 2;
 525    c->vertex_buf.buffer_offset = 0;
 526    create_vertex_buffer(c);
 527
 528    vertex_elems[0].src_offset = 0;
 529    vertex_elems[0].instance_divisor = 0;
 530    vertex_elems[0].vertex_buffer_index = 0;
 531    vertex_elems[0].src_format = PIPE_FORMAT_R32G32_FLOAT;
 532    vertex_elems[1].src_offset = sizeof(struct vertex2f);
 533    vertex_elems[1].instance_divisor = 0;
 534    vertex_elems[1].vertex_buffer_index = 0;
 535    vertex_elems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 536    vertex_elems[2].src_offset = sizeof(struct vertex2f) + sizeof(struct vertex4f);
 537    vertex_elems[2].instance_divisor = 0;
 538    vertex_elems[2].vertex_buffer_index = 0;
 539    vertex_elems[2].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 540    c->vertex_elems_state = c->pipe->create_vertex_elements_state(c->pipe, 3, vertex_elems);
 541
 542    return true;
 543 }
 544
 545 static void
 546 cleanup_buffers(struct vl_compositor *c)
 547 {
 548    assert(c);
 549
 550    c->pipe->delete_vertex_elements_state(c->pipe, c->vertex_elems_state);
 551    pipe_resource_reference(&c->vertex_buf.buffer, NULL);
 552 }
 553
 554 static INLINE struct u_rect
 555 default_rect(struct vl_compositor_layer *layer)
 556 {
 557    struct pipe_resource *res = layer->sampler_views[0]->texture;
 558    struct u_rect rect = { 0, res->width0, 0, res->height0 * res->depth0 };
 559    return rect;
 560 }
 561
 562 static INLINE struct vertex2f
 563 calc_topleft(struct vertex2f size, struct u_rect rect)
 564 {
 565    struct vertex2f res = { rect.x0 / size.x, rect.y0 / size.y };
 566    return res;
 567 }
 568
 569 static INLINE struct vertex2f
 570 calc_bottomright(struct vertex2f size, struct u_rect rect)
 571 {
 572    struct vertex2f res = { rect.x1 / size.x, rect.y1 / size.y };
 573    return res;
 574 }
 575
 576 static INLINE void
 577 calc_src_and_dst(struct vl_compositor_layer *layer, unsigned width, unsigned height,
 578                  struct u_rect src, struct u_rect dst)
 579 {
 580    struct vertex2f size =  { width, height };
 581
 582    layer->src.tl = calc_topleft(size, src);
 583    layer->src.br = calc_bottomright(size, src);
 584    layer->dst.tl = calc_topleft(size, dst);
 585    layer->dst.br = calc_bottomright(size, dst);
 586    layer->zw.x = 0.0f;
 587    layer->zw.y = size.y;
 588 }
 589
 590 static void
 591 gen_rect_verts(struct vertex2f *vb, struct vl_compositor_layer *layer)
 592 {
 593    assert(vb && layer);
 594
 595    vb[ 0].x = layer->dst.tl.x;
 596    vb[ 0].y = layer->dst.tl.y;
 597    vb[ 1].x = layer->src.tl.x;
 598    vb[ 1].y = layer->src.tl.y;
 599    vb[ 2] = layer->zw;
 600    vb[ 3].x = layer->colors[0].x;
 601    vb[ 3].y = layer->colors[0].y;
 602    vb[ 4].x = layer->colors[0].z;
 603    vb[ 4].y = layer->colors[0].w;
 604
 605    vb[ 5].x = layer->dst.br.x;
 606    vb[ 5].y = layer->dst.tl.y;
 607    vb[ 6].x = layer->src.br.x;
 608    vb[ 6].y = layer->src.tl.y;
 609    vb[ 7] = layer->zw;
 610    vb[ 8].x = layer->colors[1].x;
 611    vb[ 8].y = layer->colors[1].y;
 612    vb[ 9].x = layer->colors[1].z;
 613    vb[ 9].y = layer->colors[1].w;
 614
 615    vb[10].x = layer->dst.br.x;
 616    vb[10].y = layer->dst.br.y;
 617    vb[11].x = layer->src.br.x;
 618    vb[11].y = layer->src.br.y;
 619    vb[12] = layer->zw;
 620    vb[13].x = layer->colors[2].x;
 621    vb[13].y = layer->colors[2].y;
 622    vb[14].x = layer->colors[2].z;
 623    vb[14].y = layer->colors[2].w;
 624
 625    vb[15].x = layer->dst.tl.x;
 626    vb[15].y = layer->dst.br.y;
 627    vb[16].x = layer->src.tl.x;
 628    vb[16].y = layer->src.br.y;
 629    vb[17] = layer->zw;
 630    vb[18].x = layer->colors[3].x;
 631    vb[18].y = layer->colors[3].y;
 632    vb[19].x = layer->colors[3].z;
 633    vb[19].y = layer->colors[3].w;
 634 }
 635
 636 static INLINE struct u_rect
 637 calc_drawn_area(struct vl_compositor_state *s, struct vl_compositor_layer *layer)
 638 {
 639    struct u_rect result;
 640
 641    // scale
 642    result.x0 = layer->dst.tl.x * layer->viewport.scale[0] + layer->viewport.translate[0];
 643    result.y0 = layer->dst.tl.y * layer->viewport.scale[1] + layer->viewport.translate[1];
 644    result.x1 = layer->dst.br.x * layer->viewport.scale[0] + layer->viewport.translate[0];
 645    result.y1 = layer->dst.br.y * layer->viewport.scale[1] + layer->viewport.translate[1];
 646
 647    // and clip
 648    result.x0 = MAX2(result.x0, s->scissor.minx);
 649    result.y0 = MAX2(result.y0, s->scissor.miny);
 650    result.x1 = MIN2(result.x1, s->scissor.maxx);
 651    result.y1 = MIN2(result.y1, s->scissor.maxy);
 652    return result;
 653 }
 654
 655 static void
 656 gen_vertex_data(struct vl_compositor *c, struct vl_compositor_state *s, struct u_rect *dirty)
 657 {
 658    struct vertex2f *vb;
 659    struct pipe_transfer *buf_transfer;
 660    unsigned i;
 661
 662    assert(c);
 663
 664    vb = pipe_buffer_map(c->pipe, c->vertex_buf.buffer,
 665                         PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD_RANGE | PIPE_TRANSFER_DONTBLOCK,
 666                         &buf_transfer);
 667
 668    if (!vb) {
 669       // If buffer is still locked from last draw create a new one
 670       create_vertex_buffer(c);
 671       vb = pipe_buffer_map(c->pipe, c->vertex_buf.buffer,
 672                            PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD_RANGE,
 673                            &buf_transfer);
 674    }
 675
 676    for (i = 0; i < VL_COMPOSITOR_MAX_LAYERS; i++) {
 677       if (s->used_layers & (1 << i)) {
 678          struct vl_compositor_layer *layer = &s->layers[i];
 679          gen_rect_verts(vb, layer);
 680          vb += 20;
 681
 682          if (!layer->viewport_valid) {
 683             layer->viewport.scale[0] = c->fb_state.width;
 684             layer->viewport.scale[1] = c->fb_state.height;
 685             layer->viewport.translate[0] = 0;
 686             layer->viewport.translate[1] = 0;
 687          }
 688
 689          if (dirty && layer->clearing) {
 690             struct u_rect drawn = calc_drawn_area(s, layer);
 691             if (
 692              dirty->x0 >= drawn.x0 &&
 693              dirty->y0 >= drawn.y0 &&
 694              dirty->x1 <= drawn.x1 &&
 695              dirty->y1 <= drawn.y1) {
 696
 697                // We clear the dirty area anyway, no need for clear_render_target
 698                dirty->x0 = dirty->y0 = MAX_DIRTY;
 699                dirty->x1 = dirty->y1 = MIN_DIRTY;
 700             }
 701          }
 702       }
 703    }
 704
 705    pipe_buffer_unmap(c->pipe, buf_transfer);
 706 }
 707
 708 static void
 709 draw_layers(struct vl_compositor *c, struct vl_compositor_state *s, struct u_rect *dirty)
 710 {
 711    unsigned vb_index, i;
 712
 713    assert(c);
 714
 715    for (i = 0, vb_index = 0; i < VL_COMPOSITOR_MAX_LAYERS; ++i) {
 716       if (s->used_layers & (1 << i)) {
 717          struct vl_compositor_layer *layer = &s->layers[i];
 718          struct pipe_sampler_view **samplers = &layer->sampler_views[0];
 719          unsigned num_sampler_views = !samplers[1] ? 1 : !samplers[2] ? 2 : 3;
 720          void *blend = layer->blend ? layer->blend : i ? c->blend_add : c->blend_clear;
 721
 722          c->pipe->bind_blend_state(c->pipe, blend);
 723          c->pipe->set_viewport_state(c->pipe, &layer->viewport);
 724          c->pipe->bind_fs_state(c->pipe, layer->fs);
 725          c->pipe->bind_fragment_sampler_states(c->pipe, num_sampler_views, layer->samplers);
 726          c->pipe->set_fragment_sampler_views(c->pipe, num_sampler_views, samplers);
 727          util_draw_arrays(c->pipe, PIPE_PRIM_QUADS, vb_index * 4, 4);
 728          vb_index++;
 729
 730          if (dirty) {
 731             // Remember the currently drawn area as dirty for the next draw command
 732             struct u_rect drawn = calc_drawn_area(s, layer);
 733             dirty->x0 = MIN2(drawn.x0, dirty->x0);
 734             dirty->y0 = MIN2(drawn.y0, dirty->y0);
 735             dirty->x1 = MAX2(drawn.x1, dirty->x1);
 736             dirty->y1 = MAX2(drawn.y1, dirty->y1);
 737          }
 738       }
 739    }
 740 }
 741
 742 void
 743 vl_compositor_reset_dirty_area(struct u_rect *dirty)
 744 {
 745    assert(dirty);
 746
 747    dirty->x0 = dirty->y0 = MIN_DIRTY;
 748    dirty->x1 = dirty->y1 = MAX_DIRTY;
 749 }
 750
 751 void
 752 vl_compositor_set_clear_color(struct vl_compositor_state *s, union pipe_color_union *color)
 753 {
 754    assert(s);
 755    assert(color);
 756
 757    s->clear_color = *color;
 758 }
 759
 760 void
 761 vl_compositor_get_clear_color(struct vl_compositor_state *s, union pipe_color_union *color)
 762 {
 763    assert(s);
 764    assert(color);
 765
 766    *color = s->clear_color;
 767 }
 768
 769 void
 770 vl_compositor_clear_layers(struct vl_compositor_state *s)
 771 {
 772    unsigned i, j;
 773
 774    assert(s);
 775
 776    s->used_layers = 0;
 777    for ( i = 0; i < VL_COMPOSITOR_MAX_LAYERS; ++i) {
 778       struct vertex4f v_one = { 1.0f, 1.0f, 1.0f, 1.0f };
 779       s->layers[i].clearing = i ? false : true;
 780       s->layers[i].blend = NULL;
 781       s->layers[i].fs = NULL;
 782       s->layers[i].viewport.scale[2] = 1;
 783       s->layers[i].viewport.scale[3] = 1;
 784       s->layers[i].viewport.translate[2] = 0;
 785       s->layers[i].viewport.translate[3] = 0;
 786
 787       for ( j = 0; j < 3; j++)
 788          pipe_sampler_view_reference(&s->layers[i].sampler_views[j], NULL);
 789       for ( j = 0; j < 4; ++j)
 790          s->layers[i].colors[j] = v_one;
 791    }
 792 }
 793
 794 void
 795 vl_compositor_cleanup(struct vl_compositor *c)
 796 {
 797    assert(c);
 798
 799    cleanup_buffers(c);
 800    cleanup_shaders(c);
 801    cleanup_pipe_state(c);
 802 }
 803
 804 void
 805 vl_compositor_set_csc_matrix(struct vl_compositor_state *s, vl_csc_matrix const *matrix)
 806 {
 807    struct pipe_transfer *buf_transfer;
 808
 809    assert(s);
 810
 811    memcpy
 812    (
 813       pipe_buffer_map(s->pipe, s->csc_matrix,
 814                       PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD_RANGE,
 815                       &buf_transfer),
 816       matrix,
 817       sizeof(vl_csc_matrix)
 818    );
 819
 820    pipe_buffer_unmap(s->pipe, buf_transfer);
 821 }
 822
 823 void
 824 vl_compositor_set_dst_clip(struct vl_compositor_state *s, struct u_rect *dst_clip)
 825 {
 826    assert(s);
 827
 828    s->scissor_valid = dst_clip != NULL;
 829    if (dst_clip) {
 830       s->scissor.minx = dst_clip->x0;
 831       s->scissor.miny = dst_clip->y0;
 832       s->scissor.maxx = dst_clip->x1;
 833       s->scissor.maxy = dst_clip->y1;
 834    }
 835 }
 836
 837 void
 838 vl_compositor_set_layer_blend(struct vl_compositor_state *s,
 839                               unsigned layer, void *blend,
 840                               bool is_clearing)
 841 {
 842    assert(s && blend);
 843
 844    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 845
 846    s->layers[layer].clearing = is_clearing;
 847    s->layers[layer].blend = blend;
 848 }
 849
 850 void
 851 vl_compositor_set_layer_dst_area(struct vl_compositor_state *s,
 852                                  unsigned layer, struct u_rect *dst_area)
 853 {
 854    assert(s);
 855
 856    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 857
 858    s->layers[layer].viewport_valid = dst_area != NULL;
 859    if (dst_area) {
 860       s->layers[layer].viewport.scale[0] = dst_area->x1 - dst_area->x0;
 861       s->layers[layer].viewport.scale[1] = dst_area->y1 - dst_area->y0;
 862       s->layers[layer].viewport.translate[0] = dst_area->x0;
 863       s->layers[layer].viewport.translate[1] = dst_area->y0;
 864    }
 865 }
 866
 867 void
 868 vl_compositor_set_buffer_layer(struct vl_compositor_state *s,
 869                                struct vl_compositor *c,
 870                                unsigned layer,
 871                                struct pipe_video_buffer *buffer,
 872                                struct u_rect *src_rect,
 873                                struct u_rect *dst_rect,
 874                                enum vl_compositor_deinterlace deinterlace)
 875 {
 876    struct pipe_sampler_view **sampler_views;
 877    unsigned i;
 878
 879    assert(s && c && buffer);
 880
 881    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 882
 883    s->used_layers |= 1 << layer;
 884    sampler_views = buffer->get_sampler_view_components(buffer);
 885    for (i = 0; i < 3; ++i) {
 886       s->layers[layer].samplers[i] = c->sampler_linear;
 887       pipe_sampler_view_reference(&s->layers[layer].sampler_views[i], sampler_views[i]);
 888    }
 889
 890    calc_src_and_dst(&s->layers[layer], buffer->width, buffer->height,
 891                     src_rect ? *src_rect : default_rect(&s->layers[layer]),
 892                     dst_rect ? *dst_rect : default_rect(&s->layers[layer]));
 893
 894    if (buffer->interlaced) {
 895       float half_a_line = 0.5f / s->layers[layer].zw.y;
 896       switch(deinterlace) {
 897       case VL_COMPOSITOR_WEAVE:
 898          s->layers[layer].fs = c->fs_weave;
 899          break;
 900
 901       case VL_COMPOSITOR_BOB_TOP:
 902          s->layers[layer].zw.x = 0.25f;
 903          s->layers[layer].src.tl.y += half_a_line;
 904          s->layers[layer].src.br.y += half_a_line;
 905          s->layers[layer].fs = c->fs_video_buffer;
 906          break;
 907
 908       case VL_COMPOSITOR_BOB_BOTTOM:
 909          s->layers[layer].zw.x = 0.75f;
 910          s->layers[layer].src.tl.y -= half_a_line;
 911          s->layers[layer].src.br.y -= half_a_line;
 912          s->layers[layer].fs = c->fs_video_buffer;
 913          break;
 914       }
 915
 916    } else
 917       s->layers[layer].fs = c->fs_video_buffer;
 918 }
 919
 920 void
 921 vl_compositor_set_palette_layer(struct vl_compositor_state *s,
 922                                 struct vl_compositor *c,
 923                                 unsigned layer,
 924                                 struct pipe_sampler_view *indexes,
 925                                 struct pipe_sampler_view *palette,
 926                                 struct u_rect *src_rect,
 927                                 struct u_rect *dst_rect,
 928                                 bool include_color_conversion)
 929 {
 930    assert(s && c && indexes && palette);
 931
 932    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 933
 934    s->used_layers |= 1 << layer;
 935
 936    s->layers[layer].fs = include_color_conversion ?
 937       c->fs_palette.yuv : c->fs_palette.rgb;
 938
 939    s->layers[layer].samplers[0] = c->sampler_linear;
 940    s->layers[layer].samplers[1] = c->sampler_nearest;
 941    s->layers[layer].samplers[2] = NULL;
 942    pipe_sampler_view_reference(&s->layers[layer].sampler_views[0], indexes);
 943    pipe_sampler_view_reference(&s->layers[layer].sampler_views[1], palette);
 944    pipe_sampler_view_reference(&s->layers[layer].sampler_views[2], NULL);
 945    calc_src_and_dst(&s->layers[layer], indexes->texture->width0, indexes->texture->height0,
 946                     src_rect ? *src_rect : default_rect(&s->layers[layer]),
 947                     dst_rect ? *dst_rect : default_rect(&s->layers[layer]));
 948 }
 949
 950 void
 951 vl_compositor_set_rgba_layer(struct vl_compositor_state *s,
 952                              struct vl_compositor *c,
 953                              unsigned layer,
 954                              struct pipe_sampler_view *rgba,
 955                              struct u_rect *src_rect,
 956                              struct u_rect *dst_rect,
 957                              struct vertex4f *colors)
 958 {
 959    unsigned i;
 960
 961    assert(s && c && rgba);
 962
 963    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 964
 965    s->used_layers |= 1 << layer;
 966    s->layers[layer].fs = c->fs_rgba;
 967    s->layers[layer].samplers[0] = c->sampler_linear;
 968    s->layers[layer].samplers[1] = NULL;
 969    s->layers[layer].samplers[2] = NULL;
 970    pipe_sampler_view_reference(&s->layers[layer].sampler_views[0], rgba);
 971    pipe_sampler_view_reference(&s->layers[layer].sampler_views[1], NULL);
 972    pipe_sampler_view_reference(&s->layers[layer].sampler_views[2], NULL);
 973    calc_src_and_dst(&s->layers[layer], rgba->texture->width0, rgba->texture->height0,
 974                     src_rect ? *src_rect : default_rect(&s->layers[layer]),
 975                     dst_rect ? *dst_rect : default_rect(&s->layers[layer]));
 976
 977    if (colors)
 978       for (i = 0; i < 4; ++i)
 979          s->layers[layer].colors[i] = colors[i];
 980 }
 981
 982 void
 983 vl_compositor_render(struct vl_compositor_state *s,
 984                      struct vl_compositor       *c,
 985                      struct pipe_surface        *dst_surface,
 986                      struct u_rect              *dirty_area)
 987 {
 988    assert(c);
 989    assert(dst_surface);
 990
 991    c->fb_state.width = dst_surface->width;
 992    c->fb_state.height = dst_surface->height;
 993    c->fb_state.cbufs[0] = dst_surface;
 994
 995    if (!s->scissor_valid) {
 996       s->scissor.minx = 0;
 997       s->scissor.miny = 0;
 998       s->scissor.maxx = dst_surface->width;
 999       s->scissor.maxy = dst_surface->height;
1000    }
1001
1002    gen_vertex_data(c, s, dirty_area);
1003
1004    if (dirty_area && (dirty_area->x0 < dirty_area->x1 ||
1005                       dirty_area->y0 < dirty_area->y1)) {
1006
1007       c->pipe->clear_render_target(c->pipe, dst_surface, &s->clear_color,
1008                                    0, 0, dst_surface->width, dst_surface->height);
1009       dirty_area->x0 = dirty_area->y0 = MAX_DIRTY;
1010       dirty_area->x1 = dirty_area->y1 = MIN_DIRTY;
1011    }
1012
1013    c->pipe->set_scissor_state(c->pipe, &s->scissor);
1014    c->pipe->set_framebuffer_state(c->pipe, &c->fb_state);
1015    c->pipe->bind_vs_state(c->pipe, c->vs);
1016    c->pipe->set_vertex_buffers(c->pipe, 0, 1, &c->vertex_buf);
1017    c->pipe->bind_vertex_elements_state(c->pipe, c->vertex_elems_state);
1018    pipe_set_constant_buffer(c->pipe, PIPE_SHADER_FRAGMENT, 0, s->csc_matrix);
1019    c->pipe->bind_rasterizer_state(c->pipe, c->rast);
1020
1021    draw_layers(c, s, dirty_area);
1022 }
1023
1024 bool
1025 vl_compositor_init(struct vl_compositor *c, struct pipe_context *pipe)
1026 {
1027    assert(c);
1028
1029    memset(c, 0, sizeof(*c));
1030
1031    c->pipe = pipe;
1032
1033    if (!init_pipe_state(c))
1034       return false;
1035
1036    if (!init_shaders(c)) {
1037       cleanup_pipe_state(c);
1038       return false;
1039    }
1040
1041    if (!init_buffers(c)) {
1042       cleanup_shaders(c);
1043       cleanup_pipe_state(c);
1044       return false;
1045    }
1046
1047    return true;
1048 }
1049
1050 bool
1051 vl_compositor_init_state(struct vl_compositor_state *s, struct pipe_context *pipe)
1052 {
1053    vl_csc_matrix csc_matrix;
1054
1055    assert(s);
1056
1057    memset(s, 0, sizeof(*s));
1058
1059    s->pipe = pipe;
1060
1061    s->clear_color.f[0] = s->clear_color.f[1] = 0.0f;
1062    s->clear_color.f[2] = s->clear_color.f[3] = 0.0f;
1063
1064    /*
1065     * Create our fragment shader's constant buffer
1066     * Const buffer contains the color conversion matrix and bias vectors
1067     */
1068    /* XXX: Create with IMMUTABLE/STATIC... although it does change every once in a long while... */
1069    s->csc_matrix = pipe_buffer_create
1070    (
1071       pipe->screen,
1072       PIPE_BIND_CONSTANT_BUFFER,
1073       PIPE_USAGE_STATIC,
1074       sizeof(csc_matrix)
1075    );
1076
1077    vl_compositor_clear_layers(s);
1078
1079    vl_csc_get_matrix(VL_CSC_COLOR_STANDARD_IDENTITY, NULL, true, &csc_matrix);
1080    vl_compositor_set_csc_matrix(s, (const vl_csc_matrix *)&csc_matrix);
1081
1082    return true;
1083 }
1084
1085 void
1086 vl_compositor_cleanup_state(struct vl_compositor_state *s)
1087 {
1088    assert(s);
1089
1090    vl_compositor_clear_layers(s);
1091    pipe_resource_reference(&s->csc_matrix, NULL);
1092 }