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_2D_ARRAY, 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) + 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_SUB(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_YZ),
 207                i_tc[i], ureg_imm1f(shader, 0.5f));
 208       ureg_ROUND(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_YZ), ureg_src(t_tc[i]));
 209       ureg_MOV(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_W),
 210                ureg_imm1f(shader, i ? 1.0f : 0.0f));
 211       ureg_ADD(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_YZ),
 212                ureg_src(t_tc[i]), ureg_imm1f(shader, 0.5f));
 213       ureg_MUL(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_Y),
 214                ureg_src(t_tc[i]), ureg_scalar(i_tc[0], TGSI_SWIZZLE_W));
 215       ureg_MUL(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_Z),
 216                ureg_src(t_tc[i]), ureg_scalar(i_tc[1], TGSI_SWIZZLE_W));
 217    }
 218
 219    /* fetch the texels
 220     * texel[0..1].x = tex(t_tc[0..1][0])
 221     * texel[0..1].y = tex(t_tc[0..1][1])
 222     * texel[0..1].z = tex(t_tc[0..1][2])
 223     */
 224    for (i = 0; i < 2; ++i)
 225       for (j = 0; j < 3; ++j) {
 226          struct ureg_src src = ureg_swizzle(ureg_src(t_tc[i]),
 227             TGSI_SWIZZLE_X, j ? TGSI_SWIZZLE_Z : TGSI_SWIZZLE_Y, TGSI_SWIZZLE_W, TGSI_SWIZZLE_W);
 228
 229          ureg_TEX(shader, ureg_writemask(t_texel[i], TGSI_WRITEMASK_X << j),
 230                   TGSI_TEXTURE_2D_ARRAY, src, sampler[j]);
 231       }
 232
 233    /* calculate linear interpolation factor
 234     * factor = |round(i_tc.y) - i_tc.y| * 2
 235     */
 236    ureg_ROUND(shader, ureg_writemask(t_tc[0], TGSI_WRITEMASK_YZ), i_tc[0]);
 237    ureg_ADD(shader, ureg_writemask(t_tc[0], TGSI_WRITEMASK_YZ),
 238             ureg_src(t_tc[0]), ureg_negate(i_tc[0]));
 239    ureg_MUL(shader, ureg_writemask(t_tc[0], TGSI_WRITEMASK_YZ),
 240             ureg_abs(ureg_src(t_tc[0])), ureg_imm1f(shader, 2.0f));
 241    ureg_LRP(shader, t_texel[0], ureg_swizzle(ureg_src(t_tc[0]),
 242             TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z),
 243             ureg_src(t_texel[0]), ureg_src(t_texel[1]));
 244
 245    /* and finally do colour space transformation
 246     * fragment = csc * texel
 247     */
 248    ureg_MOV(shader, ureg_writemask(t_texel[0], TGSI_WRITEMASK_W), ureg_imm1f(shader, 1.0f));
 249    for (i = 0; i < 3; ++i)
 250       ureg_DP4(shader, ureg_writemask(o_fragment, TGSI_WRITEMASK_X << i), csc[i], ureg_src(t_texel[0]));
 251
 252    ureg_MOV(shader, ureg_writemask(o_fragment, TGSI_WRITEMASK_W), ureg_imm1f(shader, 1.0f));
 253
 254    for (i = 0; i < 2; ++i) {
 255       ureg_release_temporary(shader, t_texel[i]);
 256       ureg_release_temporary(shader, t_tc[i]);
 257    }
 258
 259    ureg_END(shader);
 260
 261    return ureg_create_shader_and_destroy(shader, c->pipe);
 262 }
 263
 264 static void *
 265 create_frag_shader_palette(struct vl_compositor *c, bool include_cc)
 266 {
 267    struct ureg_program *shader;
 268    struct ureg_src csc[3];
 269    struct ureg_src tc;
 270    struct ureg_src sampler;
 271    struct ureg_src palette;
 272    struct ureg_dst texel;
 273    struct ureg_dst fragment;
 274    unsigned i;
 275
 276    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 277    if (!shader)
 278       return false;
 279
 280    for (i = 0; include_cc && i < 3; ++i)
 281       csc[i] = ureg_DECL_constant(shader, i);
 282
 283    tc = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
 284    sampler = ureg_DECL_sampler(shader, 0);
 285    palette = ureg_DECL_sampler(shader, 1);
 286
 287    texel = ureg_DECL_temporary(shader);
 288    fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 289
 290    /*
 291     * texel = tex(tc, sampler)
 292     * fragment.xyz = tex(texel, palette) * csc
 293     * fragment.a = texel.a
 294     */
 295    ureg_TEX(shader, texel, TGSI_TEXTURE_2D, tc, sampler);
 296    ureg_MOV(shader, ureg_writemask(fragment, TGSI_WRITEMASK_W), ureg_src(texel));
 297
 298    if (include_cc) {
 299       ureg_TEX(shader, texel, TGSI_TEXTURE_1D, ureg_src(texel), palette);
 300       for (i = 0; i < 3; ++i)
 301          ureg_DP4(shader, ureg_writemask(fragment, TGSI_WRITEMASK_X << i), csc[i], ureg_src(texel));
 302    } else {
 303       ureg_TEX(shader, ureg_writemask(fragment, TGSI_WRITEMASK_XYZ),
 304                TGSI_TEXTURE_1D, ureg_src(texel), palette);
 305    }
 306
 307    ureg_release_temporary(shader, texel);
 308    ureg_END(shader);
 309
 310    return ureg_create_shader_and_destroy(shader, c->pipe);
 311 }
 312
 313 static void *
 314 create_frag_shader_rgba(struct vl_compositor *c)
 315 {
 316    struct ureg_program *shader;
 317    struct ureg_src tc, color, sampler;
 318    struct ureg_dst texel, fragment;
 319
 320    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 321    if (!shader)
 322       return false;
 323
 324    tc = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
 325    color = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_COLOR, VS_O_COLOR, TGSI_INTERPOLATE_LINEAR);
 326    sampler = ureg_DECL_sampler(shader, 0);
 327    texel = ureg_DECL_temporary(shader);
 328    fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 329
 330    /*
 331     * fragment = tex(tc, sampler)
 332     */
 333    ureg_TEX(shader, texel, TGSI_TEXTURE_2D, tc, sampler);
 334    ureg_MUL(shader, fragment, ureg_src(texel), color);
 335    ureg_END(shader);
 336
 337    return ureg_create_shader_and_destroy(shader, c->pipe);
 338 }
 339
 340 static bool
 341 init_shaders(struct vl_compositor *c)
 342 {
 343    assert(c);
 344
 345    c->vs = create_vert_shader(c);
 346    if (!c->vs) {
 347       debug_printf("Unable to create vertex shader.\n");
 348       return false;
 349    }
 350
 351    c->fs_video_buffer = create_frag_shader_video_buffer(c);
 352    if (!c->fs_video_buffer) {
 353       debug_printf("Unable to create YCbCr-to-RGB fragment shader.\n");
 354       return false;
 355    }
 356
 357    c->fs_weave = create_frag_shader_weave(c);
 358    if (!c->fs_weave) {
 359       debug_printf("Unable to create YCbCr-to-RGB weave fragment shader.\n");
 360       return false;
 361    }
 362
 363    c->fs_palette.yuv = create_frag_shader_palette(c, true);
 364    if (!c->fs_palette.yuv) {
 365       debug_printf("Unable to create YUV-Palette-to-RGB fragment shader.\n");
 366       return false;
 367    }
 368
 369    c->fs_palette.rgb = create_frag_shader_palette(c, false);
 370    if (!c->fs_palette.rgb) {
 371       debug_printf("Unable to create RGB-Palette-to-RGB fragment shader.\n");
 372       return false;
 373    }
 374
 375    c->fs_rgba = create_frag_shader_rgba(c);
 376    if (!c->fs_rgba) {
 377       debug_printf("Unable to create RGB-to-RGB fragment shader.\n");
 378       return false;
 379    }
 380
 381    return true;
 382 }
 383
 384 static void cleanup_shaders(struct vl_compositor *c)
 385 {
 386    assert(c);
 387
 388    c->pipe->delete_vs_state(c->pipe, c->vs);
 389    c->pipe->delete_fs_state(c->pipe, c->fs_video_buffer);
 390    c->pipe->delete_fs_state(c->pipe, c->fs_weave);
 391    c->pipe->delete_fs_state(c->pipe, c->fs_palette.yuv);
 392    c->pipe->delete_fs_state(c->pipe, c->fs_palette.rgb);
 393    c->pipe->delete_fs_state(c->pipe, c->fs_rgba);
 394 }
 395
 396 static bool
 397 init_pipe_state(struct vl_compositor *c)
 398 {
 399    struct pipe_rasterizer_state rast;
 400    struct pipe_sampler_state sampler;
 401    struct pipe_blend_state blend;
 402    struct pipe_depth_stencil_alpha_state dsa;
 403    unsigned i;
 404
 405    assert(c);
 406
 407    c->fb_state.nr_cbufs = 1;
 408    c->fb_state.zsbuf = NULL;
 409
 410    memset(&sampler, 0, sizeof(sampler));
 411    sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 412    sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 413    sampler.wrap_r = PIPE_TEX_WRAP_REPEAT;
 414    sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR;
 415    sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 416    sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR;
 417    sampler.compare_mode = PIPE_TEX_COMPARE_NONE;
 418    sampler.compare_func = PIPE_FUNC_ALWAYS;
 419    sampler.normalized_coords = 1;
 420
 421    c->sampler_linear = c->pipe->create_sampler_state(c->pipe, &sampler);
 422
 423    sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 424    sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 425    c->sampler_nearest = c->pipe->create_sampler_state(c->pipe, &sampler);
 426
 427    memset(&blend, 0, sizeof blend);
 428    blend.independent_blend_enable = 0;
 429    blend.rt[0].blend_enable = 0;
 430    blend.logicop_enable = 0;
 431    blend.logicop_func = PIPE_LOGICOP_CLEAR;
 432    blend.rt[0].colormask = PIPE_MASK_RGBA;
 433    blend.dither = 0;
 434    c->blend_clear = c->pipe->create_blend_state(c->pipe, &blend);
 435
 436    blend.rt[0].blend_enable = 1;
 437    blend.rt[0].rgb_func = PIPE_BLEND_ADD;
 438    blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_SRC_ALPHA;
 439    blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_INV_SRC_ALPHA;
 440    blend.rt[0].alpha_func = PIPE_BLEND_ADD;
 441    blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 442    blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
 443    c->blend_add = c->pipe->create_blend_state(c->pipe, &blend);
 444
 445    memset(&rast, 0, sizeof rast);
 446    rast.flatshade = 0;
 447    rast.front_ccw = 1;
 448    rast.cull_face = PIPE_FACE_NONE;
 449    rast.fill_back = PIPE_POLYGON_MODE_FILL;
 450    rast.fill_front = PIPE_POLYGON_MODE_FILL;
 451    rast.scissor = 1;
 452    rast.line_width = 1;
 453    rast.point_size_per_vertex = 1;
 454    rast.offset_units = 1;
 455    rast.offset_scale = 1;
 456    rast.half_pixel_center = 1;
 457    rast.bottom_edge_rule = 1;
 458    rast.depth_clip = 1;
 459
 460    c->rast = c->pipe->create_rasterizer_state(c->pipe, &rast);
 461
 462    memset(&dsa, 0, sizeof dsa);
 463    dsa.depth.enabled = 0;
 464    dsa.depth.writemask = 0;
 465    dsa.depth.func = PIPE_FUNC_ALWAYS;
 466    for (i = 0; i < 2; ++i) {
 467       dsa.stencil[i].enabled = 0;
 468       dsa.stencil[i].func = PIPE_FUNC_ALWAYS;
 469       dsa.stencil[i].fail_op = PIPE_STENCIL_OP_KEEP;
 470       dsa.stencil[i].zpass_op = PIPE_STENCIL_OP_KEEP;
 471       dsa.stencil[i].zfail_op = PIPE_STENCIL_OP_KEEP;
 472       dsa.stencil[i].valuemask = 0;
 473       dsa.stencil[i].writemask = 0;
 474    }
 475    dsa.alpha.enabled = 0;
 476    dsa.alpha.func = PIPE_FUNC_ALWAYS;
 477    dsa.alpha.ref_value = 0;
 478    c->dsa = c->pipe->create_depth_stencil_alpha_state(c->pipe, &dsa);
 479    c->pipe->bind_depth_stencil_alpha_state(c->pipe, c->dsa);
 480
 481    return true;
 482 }
 483
 484 static void cleanup_pipe_state(struct vl_compositor *c)
 485 {
 486    assert(c);
 487
 488    /* Asserted in softpipe_delete_fs_state() for some reason */
 489    c->pipe->bind_vs_state(c->pipe, NULL);
 490    c->pipe->bind_fs_state(c->pipe, NULL);
 491
 492    c->pipe->delete_depth_stencil_alpha_state(c->pipe, c->dsa);
 493    c->pipe->delete_sampler_state(c->pipe, c->sampler_linear);
 494    c->pipe->delete_sampler_state(c->pipe, c->sampler_nearest);
 495    c->pipe->delete_blend_state(c->pipe, c->blend_clear);
 496    c->pipe->delete_blend_state(c->pipe, c->blend_add);
 497    c->pipe->delete_rasterizer_state(c->pipe, c->rast);
 498 }
 499
 500 static bool
 501 create_vertex_buffer(struct vl_compositor *c)
 502 {
 503    assert(c);
 504
 505    pipe_resource_reference(&c->vertex_buf.buffer, NULL);
 506    c->vertex_buf.buffer = pipe_buffer_create
 507    (
 508       c->pipe->screen,
 509       PIPE_BIND_VERTEX_BUFFER,
 510       PIPE_USAGE_STREAM,
 511       c->vertex_buf.stride * VL_COMPOSITOR_MAX_LAYERS * 4
 512    );
 513
 514    return c->vertex_buf.buffer != NULL;
 515 }
 516
 517 static bool
 518 init_buffers(struct vl_compositor *c)
 519 {
 520    struct pipe_vertex_element vertex_elems[3];
 521
 522    assert(c);
 523
 524    /*
 525     * Create our vertex buffer and vertex buffer elements
 526     */
 527    c->vertex_buf.stride = sizeof(struct vertex2f) + sizeof(struct vertex4f) * 2;
 528    c->vertex_buf.buffer_offset = 0;
 529    create_vertex_buffer(c);
 530
 531    vertex_elems[0].src_offset = 0;
 532    vertex_elems[0].instance_divisor = 0;
 533    vertex_elems[0].vertex_buffer_index = 0;
 534    vertex_elems[0].src_format = PIPE_FORMAT_R32G32_FLOAT;
 535    vertex_elems[1].src_offset = sizeof(struct vertex2f);
 536    vertex_elems[1].instance_divisor = 0;
 537    vertex_elems[1].vertex_buffer_index = 0;
 538    vertex_elems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 539    vertex_elems[2].src_offset = sizeof(struct vertex2f) + sizeof(struct vertex4f);
 540    vertex_elems[2].instance_divisor = 0;
 541    vertex_elems[2].vertex_buffer_index = 0;
 542    vertex_elems[2].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 543    c->vertex_elems_state = c->pipe->create_vertex_elements_state(c->pipe, 3, vertex_elems);
 544
 545    return true;
 546 }
 547
 548 static void
 549 cleanup_buffers(struct vl_compositor *c)
 550 {
 551    assert(c);
 552
 553    c->pipe->delete_vertex_elements_state(c->pipe, c->vertex_elems_state);
 554    pipe_resource_reference(&c->vertex_buf.buffer, NULL);
 555 }
 556
 557 static INLINE struct u_rect
 558 default_rect(struct vl_compositor_layer *layer)
 559 {
 560    struct pipe_resource *res = layer->sampler_views[0]->texture;
 561    struct u_rect rect = { 0, res->width0, 0, res->height0 * res->array_size };
 562    return rect;
 563 }
 564
 565 static INLINE struct vertex2f
 566 calc_topleft(struct vertex2f size, struct u_rect rect)
 567 {
 568    struct vertex2f res = { rect.x0 / size.x, rect.y0 / size.y };
 569    return res;
 570 }
 571
 572 static INLINE struct vertex2f
 573 calc_bottomright(struct vertex2f size, struct u_rect rect)
 574 {
 575    struct vertex2f res = { rect.x1 / size.x, rect.y1 / size.y };
 576    return res;
 577 }
 578
 579 static INLINE void
 580 calc_src_and_dst(struct vl_compositor_layer *layer, unsigned width, unsigned height,
 581                  struct u_rect src, struct u_rect dst)
 582 {
 583    struct vertex2f size =  { width, height };
 584
 585    layer->src.tl = calc_topleft(size, src);
 586    layer->src.br = calc_bottomright(size, src);
 587    layer->dst.tl = calc_topleft(size, dst);
 588    layer->dst.br = calc_bottomright(size, dst);
 589    layer->zw.x = 0.0f;
 590    layer->zw.y = size.y;
 591 }
 592
 593 static void
 594 gen_rect_verts(struct vertex2f *vb, struct vl_compositor_layer *layer)
 595 {
 596    assert(vb && layer);
 597
 598    vb[ 0].x = layer->dst.tl.x;
 599    vb[ 0].y = layer->dst.tl.y;
 600    vb[ 1].x = layer->src.tl.x;
 601    vb[ 1].y = layer->src.tl.y;
 602    vb[ 2] = layer->zw;
 603    vb[ 3].x = layer->colors[0].x;
 604    vb[ 3].y = layer->colors[0].y;
 605    vb[ 4].x = layer->colors[0].z;
 606    vb[ 4].y = layer->colors[0].w;
 607
 608    vb[ 5].x = layer->dst.br.x;
 609    vb[ 5].y = layer->dst.tl.y;
 610    vb[ 6].x = layer->src.br.x;
 611    vb[ 6].y = layer->src.tl.y;
 612    vb[ 7] = layer->zw;
 613    vb[ 8].x = layer->colors[1].x;
 614    vb[ 8].y = layer->colors[1].y;
 615    vb[ 9].x = layer->colors[1].z;
 616    vb[ 9].y = layer->colors[1].w;
 617
 618    vb[10].x = layer->dst.br.x;
 619    vb[10].y = layer->dst.br.y;
 620    vb[11].x = layer->src.br.x;
 621    vb[11].y = layer->src.br.y;
 622    vb[12] = layer->zw;
 623    vb[13].x = layer->colors[2].x;
 624    vb[13].y = layer->colors[2].y;
 625    vb[14].x = layer->colors[2].z;
 626    vb[14].y = layer->colors[2].w;
 627
 628    vb[15].x = layer->dst.tl.x;
 629    vb[15].y = layer->dst.br.y;
 630    vb[16].x = layer->src.tl.x;
 631    vb[16].y = layer->src.br.y;
 632    vb[17] = layer->zw;
 633    vb[18].x = layer->colors[3].x;
 634    vb[18].y = layer->colors[3].y;
 635    vb[19].x = layer->colors[3].z;
 636    vb[19].y = layer->colors[3].w;
 637 }
 638
 639 static INLINE struct u_rect
 640 calc_drawn_area(struct vl_compositor_state *s, struct vl_compositor_layer *layer)
 641 {
 642    struct u_rect result;
 643
 644    // scale
 645    result.x0 = layer->dst.tl.x * layer->viewport.scale[0] + layer->viewport.translate[0];
 646    result.y0 = layer->dst.tl.y * layer->viewport.scale[1] + layer->viewport.translate[1];
 647    result.x1 = layer->dst.br.x * layer->viewport.scale[0] + layer->viewport.translate[0];
 648    result.y1 = layer->dst.br.y * layer->viewport.scale[1] + layer->viewport.translate[1];
 649
 650    // and clip
 651    result.x0 = MAX2(result.x0, s->scissor.minx);
 652    result.y0 = MAX2(result.y0, s->scissor.miny);
 653    result.x1 = MIN2(result.x1, s->scissor.maxx);
 654    result.y1 = MIN2(result.y1, s->scissor.maxy);
 655    return result;
 656 }
 657
 658 static void
 659 gen_vertex_data(struct vl_compositor *c, struct vl_compositor_state *s, struct u_rect *dirty)
 660 {
 661    struct vertex2f *vb;
 662    struct pipe_transfer *buf_transfer;
 663    unsigned i;
 664
 665    assert(c);
 666
 667    vb = pipe_buffer_map(c->pipe, c->vertex_buf.buffer,
 668                         PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD_RANGE | PIPE_TRANSFER_DONTBLOCK,
 669                         &buf_transfer);
 670
 671    if (!vb) {
 672       // If buffer is still locked from last draw create a new one
 673       create_vertex_buffer(c);
 674       vb = pipe_buffer_map(c->pipe, c->vertex_buf.buffer,
 675                            PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD_RANGE,
 676                            &buf_transfer);
 677    }
 678
 679    for (i = 0; i < VL_COMPOSITOR_MAX_LAYERS; i++) {
 680       if (s->used_layers & (1 << i)) {
 681          struct vl_compositor_layer *layer = &s->layers[i];
 682          gen_rect_verts(vb, layer);
 683          vb += 20;
 684
 685          if (!layer->viewport_valid) {
 686             layer->viewport.scale[0] = c->fb_state.width;
 687             layer->viewport.scale[1] = c->fb_state.height;
 688             layer->viewport.translate[0] = 0;
 689             layer->viewport.translate[1] = 0;
 690          }
 691
 692          if (dirty && layer->clearing) {
 693             struct u_rect drawn = calc_drawn_area(s, layer);
 694             if (
 695              dirty->x0 >= drawn.x0 &&
 696              dirty->y0 >= drawn.y0 &&
 697              dirty->x1 <= drawn.x1 &&
 698              dirty->y1 <= drawn.y1) {
 699
 700                // We clear the dirty area anyway, no need for clear_render_target
 701                dirty->x0 = dirty->y0 = MAX_DIRTY;
 702                dirty->x1 = dirty->y1 = MIN_DIRTY;
 703             }
 704          }
 705       }
 706    }
 707
 708    pipe_buffer_unmap(c->pipe, buf_transfer);
 709 }
 710
 711 static void
 712 draw_layers(struct vl_compositor *c, struct vl_compositor_state *s, struct u_rect *dirty)
 713 {
 714    unsigned vb_index, i;
 715
 716    assert(c);
 717
 718    for (i = 0, vb_index = 0; i < VL_COMPOSITOR_MAX_LAYERS; ++i) {
 719       if (s->used_layers & (1 << i)) {
 720          struct vl_compositor_layer *layer = &s->layers[i];
 721          struct pipe_sampler_view **samplers = &layer->sampler_views[0];
 722          unsigned num_sampler_views = !samplers[1] ? 1 : !samplers[2] ? 2 : 3;
 723          void *blend = layer->blend ? layer->blend : i ? c->blend_add : c->blend_clear;
 724
 725          c->pipe->bind_blend_state(c->pipe, blend);
 726          c->pipe->set_viewport_states(c->pipe, 0, 1, &layer->viewport);
 727          c->pipe->bind_fs_state(c->pipe, layer->fs);
 728          if (c->pipe->bind_sampler_states)
 729             c->pipe->bind_sampler_states(c->pipe, PIPE_SHADER_FRAGMENT, 0,
 730                                          num_sampler_views, layer->samplers);
 731          else
 732             c->pipe->bind_fragment_sampler_states(c->pipe, num_sampler_views,
 733                                                   layer->samplers);
 734          c->pipe->set_fragment_sampler_views(c->pipe, num_sampler_views, samplers);
 735          util_draw_arrays(c->pipe, PIPE_PRIM_QUADS, vb_index * 4, 4);
 736          vb_index++;
 737
 738          if (dirty) {
 739             // Remember the currently drawn area as dirty for the next draw command
 740             struct u_rect drawn = calc_drawn_area(s, layer);
 741             dirty->x0 = MIN2(drawn.x0, dirty->x0);
 742             dirty->y0 = MIN2(drawn.y0, dirty->y0);
 743             dirty->x1 = MAX2(drawn.x1, dirty->x1);
 744             dirty->y1 = MAX2(drawn.y1, dirty->y1);
 745          }
 746       }
 747    }
 748 }
 749
 750 void
 751 vl_compositor_reset_dirty_area(struct u_rect *dirty)
 752 {
 753    assert(dirty);
 754
 755    dirty->x0 = dirty->y0 = MIN_DIRTY;
 756    dirty->x1 = dirty->y1 = MAX_DIRTY;
 757 }
 758
 759 void
 760 vl_compositor_set_clear_color(struct vl_compositor_state *s, union pipe_color_union *color)
 761 {
 762    assert(s);
 763    assert(color);
 764
 765    s->clear_color = *color;
 766 }
 767
 768 void
 769 vl_compositor_get_clear_color(struct vl_compositor_state *s, union pipe_color_union *color)
 770 {
 771    assert(s);
 772    assert(color);
 773
 774    *color = s->clear_color;
 775 }
 776
 777 void
 778 vl_compositor_clear_layers(struct vl_compositor_state *s)
 779 {
 780    unsigned i, j;
 781
 782    assert(s);
 783
 784    s->used_layers = 0;
 785    for ( i = 0; i < VL_COMPOSITOR_MAX_LAYERS; ++i) {
 786       struct vertex4f v_one = { 1.0f, 1.0f, 1.0f, 1.0f };
 787       s->layers[i].clearing = i ? false : true;
 788       s->layers[i].blend = NULL;
 789       s->layers[i].fs = NULL;
 790       s->layers[i].viewport.scale[2] = 1;
 791       s->layers[i].viewport.scale[3] = 1;
 792       s->layers[i].viewport.translate[2] = 0;
 793       s->layers[i].viewport.translate[3] = 0;
 794
 795       for ( j = 0; j < 3; j++)
 796          pipe_sampler_view_reference(&s->layers[i].sampler_views[j], NULL);
 797       for ( j = 0; j < 4; ++j)
 798          s->layers[i].colors[j] = v_one;
 799    }
 800 }
 801
 802 void
 803 vl_compositor_cleanup(struct vl_compositor *c)
 804 {
 805    assert(c);
 806
 807    cleanup_buffers(c);
 808    cleanup_shaders(c);
 809    cleanup_pipe_state(c);
 810 }
 811
 812 void
 813 vl_compositor_set_csc_matrix(struct vl_compositor_state *s, vl_csc_matrix const *matrix)
 814 {
 815    struct pipe_transfer *buf_transfer;
 816
 817    assert(s);
 818
 819    memcpy
 820    (
 821       pipe_buffer_map(s->pipe, s->csc_matrix,
 822                       PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD_RANGE,
 823                       &buf_transfer),
 824       matrix,
 825       sizeof(vl_csc_matrix)
 826    );
 827
 828    pipe_buffer_unmap(s->pipe, buf_transfer);
 829 }
 830
 831 void
 832 vl_compositor_set_dst_clip(struct vl_compositor_state *s, struct u_rect *dst_clip)
 833 {
 834    assert(s);
 835
 836    s->scissor_valid = dst_clip != NULL;
 837    if (dst_clip) {
 838       s->scissor.minx = dst_clip->x0;
 839       s->scissor.miny = dst_clip->y0;
 840       s->scissor.maxx = dst_clip->x1;
 841       s->scissor.maxy = dst_clip->y1;
 842    }
 843 }
 844
 845 void
 846 vl_compositor_set_layer_blend(struct vl_compositor_state *s,
 847                               unsigned layer, void *blend,
 848                               bool is_clearing)
 849 {
 850    assert(s && blend);
 851
 852    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 853
 854    s->layers[layer].clearing = is_clearing;
 855    s->layers[layer].blend = blend;
 856 }
 857
 858 void
 859 vl_compositor_set_layer_dst_area(struct vl_compositor_state *s,
 860                                  unsigned layer, struct u_rect *dst_area)
 861 {
 862    assert(s);
 863
 864    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 865
 866    s->layers[layer].viewport_valid = dst_area != NULL;
 867    if (dst_area) {
 868       s->layers[layer].viewport.scale[0] = dst_area->x1 - dst_area->x0;
 869       s->layers[layer].viewport.scale[1] = dst_area->y1 - dst_area->y0;
 870       s->layers[layer].viewport.translate[0] = dst_area->x0;
 871       s->layers[layer].viewport.translate[1] = dst_area->y0;
 872    }
 873 }
 874
 875 void
 876 vl_compositor_set_buffer_layer(struct vl_compositor_state *s,
 877                                struct vl_compositor *c,
 878                                unsigned layer,
 879                                struct pipe_video_buffer *buffer,
 880                                struct u_rect *src_rect,
 881                                struct u_rect *dst_rect,
 882                                enum vl_compositor_deinterlace deinterlace)
 883 {
 884    struct pipe_sampler_view **sampler_views;
 885    unsigned i;
 886
 887    assert(s && c && buffer);
 888
 889    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 890
 891    s->used_layers |= 1 << layer;
 892    sampler_views = buffer->get_sampler_view_components(buffer);
 893    for (i = 0; i < 3; ++i) {
 894       s->layers[layer].samplers[i] = c->sampler_linear;
 895       pipe_sampler_view_reference(&s->layers[layer].sampler_views[i], sampler_views[i]);
 896    }
 897
 898    calc_src_and_dst(&s->layers[layer], buffer->width, buffer->height,
 899                     src_rect ? *src_rect : default_rect(&s->layers[layer]),
 900                     dst_rect ? *dst_rect : default_rect(&s->layers[layer]));
 901
 902    if (buffer->interlaced) {
 903       float half_a_line = 0.5f / s->layers[layer].zw.y;
 904       switch(deinterlace) {
 905       case VL_COMPOSITOR_WEAVE:
 906          s->layers[layer].fs = c->fs_weave;
 907          break;
 908
 909       case VL_COMPOSITOR_BOB_TOP:
 910          s->layers[layer].zw.x = 0.0f;
 911          s->layers[layer].src.tl.y += half_a_line;
 912          s->layers[layer].src.br.y += half_a_line;
 913          s->layers[layer].fs = c->fs_video_buffer;
 914          break;
 915
 916       case VL_COMPOSITOR_BOB_BOTTOM:
 917          s->layers[layer].zw.x = 1.0f;
 918          s->layers[layer].src.tl.y -= half_a_line;
 919          s->layers[layer].src.br.y -= half_a_line;
 920          s->layers[layer].fs = c->fs_video_buffer;
 921          break;
 922       }
 923
 924    } else
 925       s->layers[layer].fs = c->fs_video_buffer;
 926 }
 927
 928 void
 929 vl_compositor_set_palette_layer(struct vl_compositor_state *s,
 930                                 struct vl_compositor *c,
 931                                 unsigned layer,
 932                                 struct pipe_sampler_view *indexes,
 933                                 struct pipe_sampler_view *palette,
 934                                 struct u_rect *src_rect,
 935                                 struct u_rect *dst_rect,
 936                                 bool include_color_conversion)
 937 {
 938    assert(s && c && indexes && palette);
 939
 940    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 941
 942    s->used_layers |= 1 << layer;
 943
 944    s->layers[layer].fs = include_color_conversion ?
 945       c->fs_palette.yuv : c->fs_palette.rgb;
 946
 947    s->layers[layer].samplers[0] = c->sampler_linear;
 948    s->layers[layer].samplers[1] = c->sampler_nearest;
 949    s->layers[layer].samplers[2] = NULL;
 950    pipe_sampler_view_reference(&s->layers[layer].sampler_views[0], indexes);
 951    pipe_sampler_view_reference(&s->layers[layer].sampler_views[1], palette);
 952    pipe_sampler_view_reference(&s->layers[layer].sampler_views[2], NULL);
 953    calc_src_and_dst(&s->layers[layer], indexes->texture->width0, indexes->texture->height0,
 954                     src_rect ? *src_rect : default_rect(&s->layers[layer]),
 955                     dst_rect ? *dst_rect : default_rect(&s->layers[layer]));
 956 }
 957
 958 void
 959 vl_compositor_set_rgba_layer(struct vl_compositor_state *s,
 960                              struct vl_compositor *c,
 961                              unsigned layer,
 962                              struct pipe_sampler_view *rgba,
 963                              struct u_rect *src_rect,
 964                              struct u_rect *dst_rect,
 965                              struct vertex4f *colors)
 966 {
 967    unsigned i;
 968
 969    assert(s && c && rgba);
 970
 971    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 972
 973    s->used_layers |= 1 << layer;
 974    s->layers[layer].fs = c->fs_rgba;
 975    s->layers[layer].samplers[0] = c->sampler_linear;
 976    s->layers[layer].samplers[1] = NULL;
 977    s->layers[layer].samplers[2] = NULL;
 978    pipe_sampler_view_reference(&s->layers[layer].sampler_views[0], rgba);
 979    pipe_sampler_view_reference(&s->layers[layer].sampler_views[1], NULL);
 980    pipe_sampler_view_reference(&s->layers[layer].sampler_views[2], NULL);
 981    calc_src_and_dst(&s->layers[layer], rgba->texture->width0, rgba->texture->height0,
 982                     src_rect ? *src_rect : default_rect(&s->layers[layer]),
 983                     dst_rect ? *dst_rect : default_rect(&s->layers[layer]));
 984
 985    if (colors)
 986       for (i = 0; i < 4; ++i)
 987          s->layers[layer].colors[i] = colors[i];
 988 }
 989
 990 void
 991 vl_compositor_render(struct vl_compositor_state *s,
 992                      struct vl_compositor       *c,
 993                      struct pipe_surface        *dst_surface,
 994                      struct u_rect              *dirty_area,
 995                      bool                        clear_dirty)
 996 {
 997    assert(c);
 998    assert(dst_surface);
 999
1000    c->fb_state.width = dst_surface->width;
1001    c->fb_state.height = dst_surface->height;
1002    c->fb_state.cbufs[0] = dst_surface;
1003
1004    if (!s->scissor_valid) {
1005       s->scissor.minx = 0;
1006       s->scissor.miny = 0;
1007       s->scissor.maxx = dst_surface->width;
1008       s->scissor.maxy = dst_surface->height;
1009    }
1010
1011    gen_vertex_data(c, s, dirty_area);
1012
1013    if (clear_dirty && dirty_area &&
1014        (dirty_area->x0 < dirty_area->x1 || dirty_area->y0 < dirty_area->y1)) {
1015
1016       c->pipe->clear_render_target(c->pipe, dst_surface, &s->clear_color,
1017                                    0, 0, dst_surface->width, dst_surface->height);
1018       dirty_area->x0 = dirty_area->y0 = MAX_DIRTY;
1019       dirty_area->x1 = dirty_area->y1 = MIN_DIRTY;
1020    }
1021
1022    c->pipe->set_scissor_states(c->pipe, 0, 1, &s->scissor);
1023    c->pipe->set_framebuffer_state(c->pipe, &c->fb_state);
1024    c->pipe->bind_vs_state(c->pipe, c->vs);
1025    c->pipe->set_vertex_buffers(c->pipe, 0, 1, &c->vertex_buf);
1026    c->pipe->bind_vertex_elements_state(c->pipe, c->vertex_elems_state);
1027    pipe_set_constant_buffer(c->pipe, PIPE_SHADER_FRAGMENT, 0, s->csc_matrix);
1028    c->pipe->bind_rasterizer_state(c->pipe, c->rast);
1029
1030    draw_layers(c, s, dirty_area);
1031 }
1032
1033 bool
1034 vl_compositor_init(struct vl_compositor *c, struct pipe_context *pipe)
1035 {
1036    assert(c);
1037
1038    memset(c, 0, sizeof(*c));
1039
1040    c->pipe = pipe;
1041
1042    if (!init_pipe_state(c))
1043       return false;
1044
1045    if (!init_shaders(c)) {
1046       cleanup_pipe_state(c);
1047       return false;
1048    }
1049
1050    if (!init_buffers(c)) {
1051       cleanup_shaders(c);
1052       cleanup_pipe_state(c);
1053       return false;
1054    }
1055
1056    return true;
1057 }
1058
1059 bool
1060 vl_compositor_init_state(struct vl_compositor_state *s, struct pipe_context *pipe)
1061 {
1062    vl_csc_matrix csc_matrix;
1063
1064    assert(s);
1065
1066    memset(s, 0, sizeof(*s));
1067
1068    s->pipe = pipe;
1069
1070    s->clear_color.f[0] = s->clear_color.f[1] = 0.0f;
1071    s->clear_color.f[2] = s->clear_color.f[3] = 0.0f;
1072
1073    /*
1074     * Create our fragment shader's constant buffer
1075     * Const buffer contains the color conversion matrix and bias vectors
1076     */
1077    /* XXX: Create with IMMUTABLE/STATIC... although it does change every once in a long while... */
1078    s->csc_matrix = pipe_buffer_create
1079    (
1080       pipe->screen,
1081       PIPE_BIND_CONSTANT_BUFFER,
1082       PIPE_USAGE_STATIC,
1083       sizeof(csc_matrix)
1084    );
1085
1086    vl_compositor_clear_layers(s);
1087
1088    vl_csc_get_matrix(VL_CSC_COLOR_STANDARD_IDENTITY, NULL, true, &csc_matrix);
1089    vl_compositor_set_csc_matrix(s, (const vl_csc_matrix *)&csc_matrix);
1090
1091    return true;
1092 }
1093
1094 void
1095 vl_compositor_cleanup_state(struct vl_compositor_state *s)
1096 {
1097    assert(s);
1098
1099    vl_compositor_clear_layers(s);
1100    pipe_resource_reference(&s->csc_matrix, NULL);
1101 }