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 VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <assert.h>
  29
  30 #include "pipe/p_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 #include "util/u_upload_mgr.h"
  37
  38 #include "tgsi/tgsi_ureg.h"
  39
  40 #include "vl_csc.h"
  41 #include "vl_types.h"
  42 #include "vl_compositor.h"
  43
  44 #define MIN_DIRTY (0)
  45 #define MAX_DIRTY (1 << 15)
  46
  47 enum VS_OUTPUT
  48 {
  49    VS_O_VPOS = 0,
  50    VS_O_COLOR = 0,
  51    VS_O_VTEX = 0,
  52    VS_O_VTOP,
  53    VS_O_VBOTTOM,
  54 };
  55
  56 static void *
  57 create_vert_shader(struct vl_compositor *c)
  58 {
  59    struct ureg_program *shader;
  60    struct ureg_src vpos, vtex, color;
  61    struct ureg_dst tmp;
  62    struct ureg_dst o_vpos, o_vtex, o_color;
  63    struct ureg_dst o_vtop, o_vbottom;
  64
  65    shader = ureg_create(TGSI_PROCESSOR_VERTEX);
  66    if (!shader)
  67       return false;
  68
  69    vpos = ureg_DECL_vs_input(shader, 0);
  70    vtex = ureg_DECL_vs_input(shader, 1);
  71    color = ureg_DECL_vs_input(shader, 2);
  72    tmp = ureg_DECL_temporary(shader);
  73    o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
  74    o_color = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, VS_O_COLOR);
  75    o_vtex = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX);
  76    o_vtop = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTOP);
  77    o_vbottom = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VBOTTOM);
  78
  79    /*
  80     * o_vpos = vpos
  81     * o_vtex = vtex
  82     * o_color = color
  83     */
  84    ureg_MOV(shader, o_vpos, vpos);
  85    ureg_MOV(shader, o_vtex, vtex);
  86    ureg_MOV(shader, o_color, color);
  87
  88    /*
  89     * tmp.x = vtex.w / 2
  90     * tmp.y = vtex.w / 4
  91     *
  92     * o_vtop.x = vtex.x
  93     * o_vtop.y = vtex.y * tmp.x + 0.25f
  94     * o_vtop.z = vtex.y * tmp.y + 0.25f
  95     * o_vtop.w = 1 / tmp.x
  96     *
  97     * o_vbottom.x = vtex.x
  98     * o_vbottom.y = vtex.y * tmp.x - 0.25f
  99     * o_vbottom.z = vtex.y * tmp.y - 0.25f
 100     * o_vbottom.w = 1 / tmp.y
 101     */
 102    ureg_MUL(shader, ureg_writemask(tmp, TGSI_WRITEMASK_X),
 103             ureg_scalar(vtex, TGSI_SWIZZLE_W), ureg_imm1f(shader, 0.5f));
 104    ureg_MUL(shader, ureg_writemask(tmp, TGSI_WRITEMASK_Y),
 105             ureg_scalar(vtex, TGSI_SWIZZLE_W), ureg_imm1f(shader, 0.25f));
 106
 107    ureg_MOV(shader, ureg_writemask(o_vtop, TGSI_WRITEMASK_X), vtex);
 108    ureg_MAD(shader, ureg_writemask(o_vtop, TGSI_WRITEMASK_Y), ureg_scalar(vtex, TGSI_SWIZZLE_Y),
 109             ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_X), ureg_imm1f(shader, 0.25f));
 110    ureg_MAD(shader, ureg_writemask(o_vtop, TGSI_WRITEMASK_Z), ureg_scalar(vtex, TGSI_SWIZZLE_Y),
 111             ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_Y), ureg_imm1f(shader, 0.25f));
 112    ureg_RCP(shader, ureg_writemask(o_vtop, TGSI_WRITEMASK_W),
 113             ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_X));
 114
 115    ureg_MOV(shader, ureg_writemask(o_vbottom, TGSI_WRITEMASK_X), vtex);
 116    ureg_MAD(shader, ureg_writemask(o_vbottom, TGSI_WRITEMASK_Y), ureg_scalar(vtex, TGSI_SWIZZLE_Y),
 117             ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_X), ureg_imm1f(shader, -0.25f));
 118    ureg_MAD(shader, ureg_writemask(o_vbottom, TGSI_WRITEMASK_Z), ureg_scalar(vtex, TGSI_SWIZZLE_Y),
 119             ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_Y), ureg_imm1f(shader, -0.25f));
 120    ureg_RCP(shader, ureg_writemask(o_vbottom, TGSI_WRITEMASK_W),
 121             ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_Y));
 122
 123    ureg_END(shader);
 124
 125    return ureg_create_shader_and_destroy(shader, c->pipe);
 126 }
 127
 128 static void *
 129 create_frag_shader_video_buffer(struct vl_compositor *c)
 130 {
 131    struct ureg_program *shader;
 132    struct ureg_src tc;
 133    struct ureg_src csc[3];
 134    struct ureg_src sampler[3];
 135    struct ureg_dst texel;
 136    struct ureg_dst fragment;
 137    unsigned i;
 138
 139    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 140    if (!shader)
 141       return false;
 142
 143    tc = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
 144    for (i = 0; i < 3; ++i) {
 145       csc[i] = ureg_DECL_constant(shader, i);
 146       sampler[i] = ureg_DECL_sampler(shader, i);
 147    }
 148    texel = ureg_DECL_temporary(shader);
 149    fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 150
 151    /*
 152     * texel.xyz = tex(tc, sampler[i])
 153     * fragment = csc * texel
 154     */
 155    for (i = 0; i < 3; ++i)
 156       ureg_TEX(shader, ureg_writemask(texel, TGSI_WRITEMASK_X << i), TGSI_TEXTURE_2D_ARRAY, tc, sampler[i]);
 157
 158    ureg_MOV(shader, ureg_writemask(texel, TGSI_WRITEMASK_W), ureg_imm1f(shader, 1.0f));
 159
 160    for (i = 0; i < 3; ++i)
 161       ureg_DP4(shader, ureg_writemask(fragment, TGSI_WRITEMASK_X << i), csc[i], ureg_src(texel));
 162
 163    ureg_MOV(shader, ureg_writemask(fragment, TGSI_WRITEMASK_W), ureg_imm1f(shader, 1.0f));
 164
 165    ureg_release_temporary(shader, texel);
 166    ureg_END(shader);
 167
 168    return ureg_create_shader_and_destroy(shader, c->pipe);
 169 }
 170
 171 static void *
 172 create_frag_shader_weave(struct vl_compositor *c)
 173 {
 174    struct ureg_program *shader;
 175    struct ureg_src i_tc[2];
 176    struct ureg_src csc[3];
 177    struct ureg_src sampler[3];
 178    struct ureg_dst t_tc[2];
 179    struct ureg_dst t_texel[2];
 180    struct ureg_dst o_fragment;
 181    unsigned i, j;
 182
 183    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 184    if (!shader)
 185       return false;
 186
 187    i_tc[0] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTOP, TGSI_INTERPOLATE_LINEAR);
 188    i_tc[1] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VBOTTOM, TGSI_INTERPOLATE_LINEAR);
 189
 190    for (i = 0; i < 3; ++i) {
 191       csc[i] = ureg_DECL_constant(shader, i);
 192       sampler[i] = ureg_DECL_sampler(shader, i);
 193    }
 194
 195    for (i = 0; i < 2; ++i) {
 196       t_tc[i] = ureg_DECL_temporary(shader);
 197       t_texel[i] = ureg_DECL_temporary(shader);
 198    }
 199    o_fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 200
 201    /* calculate the texture offsets
 202     * t_tc.x = i_tc.x
 203     * t_tc.y = (round(i_tc.y - 0.5) + 0.5) / height * 2
 204     */
 205    for (i = 0; i < 2; ++i) {
 206       ureg_MOV(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_X), i_tc[i]);
 207       ureg_SUB(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_YZ),
 208                i_tc[i], ureg_imm1f(shader, 0.5f));
 209       ureg_ROUND(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_YZ), ureg_src(t_tc[i]));
 210       ureg_MOV(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_W),
 211                ureg_imm1f(shader, i ? 1.0f : 0.0f));
 212       ureg_ADD(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_YZ),
 213                ureg_src(t_tc[i]), ureg_imm1f(shader, 0.5f));
 214       ureg_MUL(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_Y),
 215                ureg_src(t_tc[i]), ureg_scalar(i_tc[0], TGSI_SWIZZLE_W));
 216       ureg_MUL(shader, ureg_writemask(t_tc[i], TGSI_WRITEMASK_Z),
 217                ureg_src(t_tc[i]), ureg_scalar(i_tc[1], TGSI_SWIZZLE_W));
 218    }
 219
 220    /* fetch the texels
 221     * texel[0..1].x = tex(t_tc[0..1][0])
 222     * texel[0..1].y = tex(t_tc[0..1][1])
 223     * texel[0..1].z = tex(t_tc[0..1][2])
 224     */
 225    for (i = 0; i < 2; ++i)
 226       for (j = 0; j < 3; ++j) {
 227          struct ureg_src src = ureg_swizzle(ureg_src(t_tc[i]),
 228             TGSI_SWIZZLE_X, j ? TGSI_SWIZZLE_Z : TGSI_SWIZZLE_Y, TGSI_SWIZZLE_W, TGSI_SWIZZLE_W);
 229
 230          ureg_TEX(shader, ureg_writemask(t_texel[i], TGSI_WRITEMASK_X << j),
 231                   TGSI_TEXTURE_2D_ARRAY, src, sampler[j]);
 232       }
 233
 234    /* calculate linear interpolation factor
 235     * factor = |round(i_tc.y) - i_tc.y| * 2
 236     */
 237    ureg_ROUND(shader, ureg_writemask(t_tc[0], TGSI_WRITEMASK_YZ), i_tc[0]);
 238    ureg_ADD(shader, ureg_writemask(t_tc[0], TGSI_WRITEMASK_YZ),
 239             ureg_src(t_tc[0]), ureg_negate(i_tc[0]));
 240    ureg_MUL(shader, ureg_writemask(t_tc[0], TGSI_WRITEMASK_YZ),
 241             ureg_abs(ureg_src(t_tc[0])), ureg_imm1f(shader, 2.0f));
 242    ureg_LRP(shader, t_texel[0], ureg_swizzle(ureg_src(t_tc[0]),
 243             TGSI_SWIZZLE_Y, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z, TGSI_SWIZZLE_Z),
 244             ureg_src(t_texel[0]), ureg_src(t_texel[1]));
 245
 246    /* and finally do colour space transformation
 247     * fragment = csc * texel
 248     */
 249    ureg_MOV(shader, ureg_writemask(t_texel[0], TGSI_WRITEMASK_W), ureg_imm1f(shader, 1.0f));
 250    for (i = 0; i < 3; ++i)
 251       ureg_DP4(shader, ureg_writemask(o_fragment, TGSI_WRITEMASK_X << i), csc[i], ureg_src(t_texel[0]));
 252
 253    ureg_MOV(shader, ureg_writemask(o_fragment, TGSI_WRITEMASK_W), ureg_imm1f(shader, 1.0f));
 254
 255    for (i = 0; i < 2; ++i) {
 256       ureg_release_temporary(shader, t_texel[i]);
 257       ureg_release_temporary(shader, t_tc[i]);
 258    }
 259
 260    ureg_END(shader);
 261
 262    return ureg_create_shader_and_destroy(shader, c->pipe);
 263 }
 264
 265 static void *
 266 create_frag_shader_palette(struct vl_compositor *c, bool include_cc)
 267 {
 268    struct ureg_program *shader;
 269    struct ureg_src csc[3];
 270    struct ureg_src tc;
 271    struct ureg_src sampler;
 272    struct ureg_src palette;
 273    struct ureg_dst texel;
 274    struct ureg_dst fragment;
 275    unsigned i;
 276
 277    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 278    if (!shader)
 279       return false;
 280
 281    for (i = 0; include_cc && i < 3; ++i)
 282       csc[i] = ureg_DECL_constant(shader, i);
 283
 284    tc = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
 285    sampler = ureg_DECL_sampler(shader, 0);
 286    palette = ureg_DECL_sampler(shader, 1);
 287
 288    texel = ureg_DECL_temporary(shader);
 289    fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 290
 291    /*
 292     * texel = tex(tc, sampler)
 293     * fragment.xyz = tex(texel, palette) * csc
 294     * fragment.a = texel.a
 295     */
 296    ureg_TEX(shader, texel, TGSI_TEXTURE_2D, tc, sampler);
 297    ureg_MOV(shader, ureg_writemask(fragment, TGSI_WRITEMASK_W), ureg_src(texel));
 298
 299    if (include_cc) {
 300       ureg_TEX(shader, texel, TGSI_TEXTURE_1D, ureg_src(texel), palette);
 301       for (i = 0; i < 3; ++i)
 302          ureg_DP4(shader, ureg_writemask(fragment, TGSI_WRITEMASK_X << i), csc[i], ureg_src(texel));
 303    } else {
 304       ureg_TEX(shader, ureg_writemask(fragment, TGSI_WRITEMASK_XYZ),
 305                TGSI_TEXTURE_1D, ureg_src(texel), palette);
 306    }
 307
 308    ureg_release_temporary(shader, texel);
 309    ureg_END(shader);
 310
 311    return ureg_create_shader_and_destroy(shader, c->pipe);
 312 }
 313
 314 static void *
 315 create_frag_shader_rgba(struct vl_compositor *c)
 316 {
 317    struct ureg_program *shader;
 318    struct ureg_src tc, color, sampler;
 319    struct ureg_dst texel, fragment;
 320
 321    shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
 322    if (!shader)
 323       return false;
 324
 325    tc = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
 326    color = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_COLOR, VS_O_COLOR, TGSI_INTERPOLATE_LINEAR);
 327    sampler = ureg_DECL_sampler(shader, 0);
 328    texel = ureg_DECL_temporary(shader);
 329    fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 330
 331    /*
 332     * fragment = tex(tc, sampler)
 333     */
 334    ureg_TEX(shader, texel, TGSI_TEXTURE_2D, tc, sampler);
 335    ureg_MUL(shader, fragment, ureg_src(texel), color);
 336    ureg_END(shader);
 337
 338    return ureg_create_shader_and_destroy(shader, c->pipe);
 339 }
 340
 341 static bool
 342 init_shaders(struct vl_compositor *c)
 343 {
 344    assert(c);
 345
 346    c->vs = create_vert_shader(c);
 347    if (!c->vs) {
 348       debug_printf("Unable to create vertex shader.\n");
 349       return false;
 350    }
 351
 352    c->fs_video_buffer = create_frag_shader_video_buffer(c);
 353    if (!c->fs_video_buffer) {
 354       debug_printf("Unable to create YCbCr-to-RGB fragment shader.\n");
 355       return false;
 356    }
 357
 358    c->fs_weave = create_frag_shader_weave(c);
 359    if (!c->fs_weave) {
 360       debug_printf("Unable to create YCbCr-to-RGB weave fragment shader.\n");
 361       return false;
 362    }
 363
 364    c->fs_palette.yuv = create_frag_shader_palette(c, true);
 365    if (!c->fs_palette.yuv) {
 366       debug_printf("Unable to create YUV-Palette-to-RGB fragment shader.\n");
 367       return false;
 368    }
 369
 370    c->fs_palette.rgb = create_frag_shader_palette(c, false);
 371    if (!c->fs_palette.rgb) {
 372       debug_printf("Unable to create RGB-Palette-to-RGB fragment shader.\n");
 373       return false;
 374    }
 375
 376    c->fs_rgba = create_frag_shader_rgba(c);
 377    if (!c->fs_rgba) {
 378       debug_printf("Unable to create RGB-to-RGB fragment shader.\n");
 379       return false;
 380    }
 381
 382    return true;
 383 }
 384
 385 static void cleanup_shaders(struct vl_compositor *c)
 386 {
 387    assert(c);
 388
 389    c->pipe->delete_vs_state(c->pipe, c->vs);
 390    c->pipe->delete_fs_state(c->pipe, c->fs_video_buffer);
 391    c->pipe->delete_fs_state(c->pipe, c->fs_weave);
 392    c->pipe->delete_fs_state(c->pipe, c->fs_palette.yuv);
 393    c->pipe->delete_fs_state(c->pipe, c->fs_palette.rgb);
 394    c->pipe->delete_fs_state(c->pipe, c->fs_rgba);
 395 }
 396
 397 static bool
 398 init_pipe_state(struct vl_compositor *c)
 399 {
 400    struct pipe_rasterizer_state rast;
 401    struct pipe_sampler_state sampler;
 402    struct pipe_blend_state blend;
 403    struct pipe_depth_stencil_alpha_state dsa;
 404    unsigned i;
 405
 406    assert(c);
 407
 408    c->fb_state.nr_cbufs = 1;
 409    c->fb_state.zsbuf = NULL;
 410
 411    memset(&sampler, 0, sizeof(sampler));
 412    sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 413    sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 414    sampler.wrap_r = PIPE_TEX_WRAP_REPEAT;
 415    sampler.min_img_filter = PIPE_TEX_FILTER_LINEAR;
 416    sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 417    sampler.mag_img_filter = PIPE_TEX_FILTER_LINEAR;
 418    sampler.compare_mode = PIPE_TEX_COMPARE_NONE;
 419    sampler.compare_func = PIPE_FUNC_ALWAYS;
 420    sampler.normalized_coords = 1;
 421
 422    c->sampler_linear = c->pipe->create_sampler_state(c->pipe, &sampler);
 423
 424    sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 425    sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 426    c->sampler_nearest = c->pipe->create_sampler_state(c->pipe, &sampler);
 427
 428    memset(&blend, 0, sizeof blend);
 429    blend.independent_blend_enable = 0;
 430    blend.rt[0].blend_enable = 0;
 431    blend.logicop_enable = 0;
 432    blend.logicop_func = PIPE_LOGICOP_CLEAR;
 433    blend.rt[0].colormask = PIPE_MASK_RGBA;
 434    blend.dither = 0;
 435    c->blend_clear = c->pipe->create_blend_state(c->pipe, &blend);
 436
 437    blend.rt[0].blend_enable = 1;
 438    blend.rt[0].rgb_func = PIPE_BLEND_ADD;
 439    blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_SRC_ALPHA;
 440    blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_INV_SRC_ALPHA;
 441    blend.rt[0].alpha_func = PIPE_BLEND_ADD;
 442    blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 443    blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
 444    c->blend_add = c->pipe->create_blend_state(c->pipe, &blend);
 445
 446    memset(&rast, 0, sizeof rast);
 447    rast.flatshade = 0;
 448    rast.front_ccw = 1;
 449    rast.cull_face = PIPE_FACE_NONE;
 450    rast.fill_back = PIPE_POLYGON_MODE_FILL;
 451    rast.fill_front = PIPE_POLYGON_MODE_FILL;
 452    rast.scissor = 1;
 453    rast.line_width = 1;
 454    rast.point_size_per_vertex = 1;
 455    rast.offset_units = 1;
 456    rast.offset_scale = 1;
 457    rast.half_pixel_center = 1;
 458    rast.bottom_edge_rule = 1;
 459    rast.depth_clip = 1;
 460
 461    c->rast = c->pipe->create_rasterizer_state(c->pipe, &rast);
 462
 463    memset(&dsa, 0, sizeof dsa);
 464    dsa.depth.enabled = 0;
 465    dsa.depth.writemask = 0;
 466    dsa.depth.func = PIPE_FUNC_ALWAYS;
 467    for (i = 0; i < 2; ++i) {
 468       dsa.stencil[i].enabled = 0;
 469       dsa.stencil[i].func = PIPE_FUNC_ALWAYS;
 470       dsa.stencil[i].fail_op = PIPE_STENCIL_OP_KEEP;
 471       dsa.stencil[i].zpass_op = PIPE_STENCIL_OP_KEEP;
 472       dsa.stencil[i].zfail_op = PIPE_STENCIL_OP_KEEP;
 473       dsa.stencil[i].valuemask = 0;
 474       dsa.stencil[i].writemask = 0;
 475    }
 476    dsa.alpha.enabled = 0;
 477    dsa.alpha.func = PIPE_FUNC_ALWAYS;
 478    dsa.alpha.ref_value = 0;
 479    c->dsa = c->pipe->create_depth_stencil_alpha_state(c->pipe, &dsa);
 480    c->pipe->bind_depth_stencil_alpha_state(c->pipe, c->dsa);
 481
 482    return true;
 483 }
 484
 485 static void cleanup_pipe_state(struct vl_compositor *c)
 486 {
 487    assert(c);
 488
 489    /* Asserted in softpipe_delete_fs_state() for some reason */
 490    c->pipe->bind_vs_state(c->pipe, NULL);
 491    c->pipe->bind_fs_state(c->pipe, NULL);
 492
 493    c->pipe->delete_depth_stencil_alpha_state(c->pipe, c->dsa);
 494    c->pipe->delete_sampler_state(c->pipe, c->sampler_linear);
 495    c->pipe->delete_sampler_state(c->pipe, c->sampler_nearest);
 496    c->pipe->delete_blend_state(c->pipe, c->blend_clear);
 497    c->pipe->delete_blend_state(c->pipe, c->blend_add);
 498    c->pipe->delete_rasterizer_state(c->pipe, c->rast);
 499 }
 500
 501 static bool
 502 init_buffers(struct vl_compositor *c)
 503 {
 504    struct pipe_vertex_element vertex_elems[3];
 505
 506    assert(c);
 507
 508    /*
 509     * Create our vertex buffer and vertex buffer elements
 510     */
 511    c->vertex_buf.stride = sizeof(struct vertex2f) + sizeof(struct vertex4f) * 2;
 512    c->vertex_buf.buffer_offset = 0;
 513    c->vertex_buf.buffer = NULL;
 514
 515    vertex_elems[0].src_offset = 0;
 516    vertex_elems[0].instance_divisor = 0;
 517    vertex_elems[0].vertex_buffer_index = 0;
 518    vertex_elems[0].src_format = PIPE_FORMAT_R32G32_FLOAT;
 519    vertex_elems[1].src_offset = sizeof(struct vertex2f);
 520    vertex_elems[1].instance_divisor = 0;
 521    vertex_elems[1].vertex_buffer_index = 0;
 522    vertex_elems[1].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 523    vertex_elems[2].src_offset = sizeof(struct vertex2f) + sizeof(struct vertex4f);
 524    vertex_elems[2].instance_divisor = 0;
 525    vertex_elems[2].vertex_buffer_index = 0;
 526    vertex_elems[2].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 527    c->vertex_elems_state = c->pipe->create_vertex_elements_state(c->pipe, 3, vertex_elems);
 528
 529    return true;
 530 }
 531
 532 static void
 533 cleanup_buffers(struct vl_compositor *c)
 534 {
 535    assert(c);
 536
 537    c->pipe->delete_vertex_elements_state(c->pipe, c->vertex_elems_state);
 538    pipe_resource_reference(&c->vertex_buf.buffer, NULL);
 539 }
 540
 541 static inline struct u_rect
 542 default_rect(struct vl_compositor_layer *layer)
 543 {
 544    struct pipe_resource *res = layer->sampler_views[0]->texture;
 545    struct u_rect rect = { 0, res->width0, 0, res->height0 * res->array_size };
 546    return rect;
 547 }
 548
 549 static inline struct vertex2f
 550 calc_topleft(struct vertex2f size, struct u_rect rect)
 551 {
 552    struct vertex2f res = { rect.x0 / size.x, rect.y0 / size.y };
 553    return res;
 554 }
 555
 556 static inline struct vertex2f
 557 calc_bottomright(struct vertex2f size, struct u_rect rect)
 558 {
 559    struct vertex2f res = { rect.x1 / size.x, rect.y1 / size.y };
 560    return res;
 561 }
 562
 563 static inline void
 564 calc_src_and_dst(struct vl_compositor_layer *layer, unsigned width, unsigned height,
 565                  struct u_rect src, struct u_rect dst)
 566 {
 567    struct vertex2f size =  { width, height };
 568
 569    layer->src.tl = calc_topleft(size, src);
 570    layer->src.br = calc_bottomright(size, src);
 571    layer->dst.tl = calc_topleft(size, dst);
 572    layer->dst.br = calc_bottomright(size, dst);
 573    layer->zw.x = 0.0f;
 574    layer->zw.y = size.y;
 575 }
 576
 577 static void
 578 gen_rect_verts(struct vertex2f *vb, struct vl_compositor_layer *layer)
 579 {
 580    struct vertex2f tl, tr, br, bl;
 581
 582    assert(vb && layer);
 583
 584    switch (layer->rotate) {
 585    default:
 586    case VL_COMPOSITOR_ROTATE_0:
 587       tl = layer->dst.tl;
 588       tr.x = layer->dst.br.x;
 589       tr.y = layer->dst.tl.y;
 590       br = layer->dst.br;
 591       bl.x = layer->dst.tl.x;
 592       bl.y = layer->dst.br.y;
 593       break;
 594    case VL_COMPOSITOR_ROTATE_90:
 595       tl.x = layer->dst.br.x;
 596       tl.y = layer->dst.tl.y;
 597       tr = layer->dst.br;
 598       br.x = layer->dst.tl.x;
 599       br.y = layer->dst.br.y;
 600       bl = layer->dst.tl;
 601       break;
 602    case VL_COMPOSITOR_ROTATE_180:
 603       tl = layer->dst.br;
 604       tr.x = layer->dst.tl.x;
 605       tr.y = layer->dst.br.y;
 606       br = layer->dst.tl;
 607       bl.x = layer->dst.br.x;
 608       bl.y = layer->dst.tl.y;
 609       break;
 610    case VL_COMPOSITOR_ROTATE_270:
 611       tl.x = layer->dst.tl.x;
 612       tl.y = layer->dst.br.y;
 613       tr = layer->dst.tl;
 614       br.x = layer->dst.br.x;
 615       br.y = layer->dst.tl.y;
 616       bl = layer->dst.br;
 617       break;
 618    }
 619
 620    vb[ 0].x = tl.x;
 621    vb[ 0].y = tl.y;
 622    vb[ 1].x = layer->src.tl.x;
 623    vb[ 1].y = layer->src.tl.y;
 624    vb[ 2] = layer->zw;
 625    vb[ 3].x = layer->colors[0].x;
 626    vb[ 3].y = layer->colors[0].y;
 627    vb[ 4].x = layer->colors[0].z;
 628    vb[ 4].y = layer->colors[0].w;
 629
 630    vb[ 5].x = tr.x;
 631    vb[ 5].y = tr.y;
 632    vb[ 6].x = layer->src.br.x;
 633    vb[ 6].y = layer->src.tl.y;
 634    vb[ 7] = layer->zw;
 635    vb[ 8].x = layer->colors[1].x;
 636    vb[ 8].y = layer->colors[1].y;
 637    vb[ 9].x = layer->colors[1].z;
 638    vb[ 9].y = layer->colors[1].w;
 639
 640    vb[10].x = br.x;
 641    vb[10].y = br.y;
 642    vb[11].x = layer->src.br.x;
 643    vb[11].y = layer->src.br.y;
 644    vb[12] = layer->zw;
 645    vb[13].x = layer->colors[2].x;
 646    vb[13].y = layer->colors[2].y;
 647    vb[14].x = layer->colors[2].z;
 648    vb[14].y = layer->colors[2].w;
 649
 650    vb[15].x = bl.x;
 651    vb[15].y = bl.y;
 652    vb[16].x = layer->src.tl.x;
 653    vb[16].y = layer->src.br.y;
 654    vb[17] = layer->zw;
 655    vb[18].x = layer->colors[3].x;
 656    vb[18].y = layer->colors[3].y;
 657    vb[19].x = layer->colors[3].z;
 658    vb[19].y = layer->colors[3].w;
 659 }
 660
 661 static inline struct u_rect
 662 calc_drawn_area(struct vl_compositor_state *s, struct vl_compositor_layer *layer)
 663 {
 664    struct vertex2f tl, br;
 665    struct u_rect result;
 666
 667    assert(s && layer);
 668
 669    // rotate
 670    switch (layer->rotate) {
 671    default:
 672    case VL_COMPOSITOR_ROTATE_0:
 673       tl = layer->dst.tl;
 674       br = layer->dst.br;
 675       break;
 676    case VL_COMPOSITOR_ROTATE_90:
 677       tl.x = layer->dst.br.x;
 678       tl.y = layer->dst.tl.y;
 679       br.x = layer->dst.tl.x;
 680       br.y = layer->dst.br.y;
 681       break;
 682    case VL_COMPOSITOR_ROTATE_180:
 683       tl = layer->dst.br;
 684       br = layer->dst.tl;
 685       break;
 686    case VL_COMPOSITOR_ROTATE_270:
 687       tl.x = layer->dst.tl.x;
 688       tl.y = layer->dst.br.y;
 689       br.x = layer->dst.br.x;
 690       br.y = layer->dst.tl.y;
 691       break;
 692    }
 693
 694    // scale
 695    result.x0 = tl.x * layer->viewport.scale[0] + layer->viewport.translate[0];
 696    result.y0 = tl.y * layer->viewport.scale[1] + layer->viewport.translate[1];
 697    result.x1 = br.x * layer->viewport.scale[0] + layer->viewport.translate[0];
 698    result.y1 = br.y * layer->viewport.scale[1] + layer->viewport.translate[1];
 699
 700    // and clip
 701    result.x0 = MAX2(result.x0, s->scissor.minx);
 702    result.y0 = MAX2(result.y0, s->scissor.miny);
 703    result.x1 = MIN2(result.x1, s->scissor.maxx);
 704    result.y1 = MIN2(result.y1, s->scissor.maxy);
 705    return result;
 706 }
 707
 708 static void
 709 gen_vertex_data(struct vl_compositor *c, struct vl_compositor_state *s, struct u_rect *dirty)
 710 {
 711    struct vertex2f *vb;
 712    unsigned i;
 713
 714    assert(c);
 715
 716    /* Allocate new memory for vertices. */
 717    u_upload_alloc(c->upload, 0,
 718                   c->vertex_buf.stride * VL_COMPOSITOR_MAX_LAYERS * 4, /* size */
 719                   4, /* alignment */
 720                   &c->vertex_buf.buffer_offset, &c->vertex_buf.buffer,
 721                   (void**)&vb);
 722
 723    for (i = 0; i < VL_COMPOSITOR_MAX_LAYERS; i++) {
 724       if (s->used_layers & (1 << i)) {
 725          struct vl_compositor_layer *layer = &s->layers[i];
 726          gen_rect_verts(vb, layer);
 727          vb += 20;
 728
 729          if (!layer->viewport_valid) {
 730             layer->viewport.scale[0] = c->fb_state.width;
 731             layer->viewport.scale[1] = c->fb_state.height;
 732             layer->viewport.translate[0] = 0;
 733             layer->viewport.translate[1] = 0;
 734          }
 735
 736          if (dirty && layer->clearing) {
 737             struct u_rect drawn = calc_drawn_area(s, layer);
 738             if (
 739              dirty->x0 >= drawn.x0 &&
 740              dirty->y0 >= drawn.y0 &&
 741              dirty->x1 <= drawn.x1 &&
 742              dirty->y1 <= drawn.y1) {
 743
 744                // We clear the dirty area anyway, no need for clear_render_target
 745                dirty->x0 = dirty->y0 = MAX_DIRTY;
 746                dirty->x1 = dirty->y1 = MIN_DIRTY;
 747             }
 748          }
 749       }
 750    }
 751
 752    u_upload_unmap(c->upload);
 753 }
 754
 755 static void
 756 draw_layers(struct vl_compositor *c, struct vl_compositor_state *s, struct u_rect *dirty)
 757 {
 758    unsigned vb_index, i;
 759
 760    assert(c);
 761
 762    for (i = 0, vb_index = 0; i < VL_COMPOSITOR_MAX_LAYERS; ++i) {
 763       if (s->used_layers & (1 << i)) {
 764          struct vl_compositor_layer *layer = &s->layers[i];
 765          struct pipe_sampler_view **samplers = &layer->sampler_views[0];
 766          unsigned num_sampler_views = !samplers[1] ? 1 : !samplers[2] ? 2 : 3;
 767          void *blend = layer->blend ? layer->blend : i ? c->blend_add : c->blend_clear;
 768
 769          c->pipe->bind_blend_state(c->pipe, blend);
 770          c->pipe->set_viewport_states(c->pipe, 0, 1, &layer->viewport);
 771          c->pipe->bind_fs_state(c->pipe, layer->fs);
 772          c->pipe->bind_sampler_states(c->pipe, PIPE_SHADER_FRAGMENT, 0,
 773                                       num_sampler_views, layer->samplers);
 774          c->pipe->set_sampler_views(c->pipe, PIPE_SHADER_FRAGMENT, 0,
 775                                     num_sampler_views, samplers);
 776
 777          util_draw_arrays(c->pipe, PIPE_PRIM_QUADS, vb_index * 4, 4);
 778          vb_index++;
 779
 780          if (dirty) {
 781             // Remember the currently drawn area as dirty for the next draw command
 782             struct u_rect drawn = calc_drawn_area(s, layer);
 783             dirty->x0 = MIN2(drawn.x0, dirty->x0);
 784             dirty->y0 = MIN2(drawn.y0, dirty->y0);
 785             dirty->x1 = MAX2(drawn.x1, dirty->x1);
 786             dirty->y1 = MAX2(drawn.y1, dirty->y1);
 787          }
 788       }
 789    }
 790 }
 791
 792 void
 793 vl_compositor_reset_dirty_area(struct u_rect *dirty)
 794 {
 795    assert(dirty);
 796
 797    dirty->x0 = dirty->y0 = MIN_DIRTY;
 798    dirty->x1 = dirty->y1 = MAX_DIRTY;
 799 }
 800
 801 void
 802 vl_compositor_set_clear_color(struct vl_compositor_state *s, union pipe_color_union *color)
 803 {
 804    assert(s);
 805    assert(color);
 806
 807    s->clear_color = *color;
 808 }
 809
 810 void
 811 vl_compositor_get_clear_color(struct vl_compositor_state *s, union pipe_color_union *color)
 812 {
 813    assert(s);
 814    assert(color);
 815
 816    *color = s->clear_color;
 817 }
 818
 819 void
 820 vl_compositor_clear_layers(struct vl_compositor_state *s)
 821 {
 822    unsigned i, j;
 823
 824    assert(s);
 825
 826    s->used_layers = 0;
 827    for ( i = 0; i < VL_COMPOSITOR_MAX_LAYERS; ++i) {
 828       struct vertex4f v_one = { 1.0f, 1.0f, 1.0f, 1.0f };
 829       s->layers[i].clearing = i ? false : true;
 830       s->layers[i].blend = NULL;
 831       s->layers[i].fs = NULL;
 832       s->layers[i].viewport.scale[2] = 1;
 833       s->layers[i].viewport.translate[2] = 0;
 834       s->layers[i].rotate = VL_COMPOSITOR_ROTATE_0;
 835
 836       for ( j = 0; j < 3; j++)
 837          pipe_sampler_view_reference(&s->layers[i].sampler_views[j], NULL);
 838       for ( j = 0; j < 4; ++j)
 839          s->layers[i].colors[j] = v_one;
 840    }
 841 }
 842
 843 void
 844 vl_compositor_cleanup(struct vl_compositor *c)
 845 {
 846    assert(c);
 847
 848    u_upload_destroy(c->upload);
 849    cleanup_buffers(c);
 850    cleanup_shaders(c);
 851    cleanup_pipe_state(c);
 852 }
 853
 854 void
 855 vl_compositor_set_csc_matrix(struct vl_compositor_state *s, vl_csc_matrix const *matrix)
 856 {
 857    struct pipe_transfer *buf_transfer;
 858
 859    assert(s);
 860
 861    memcpy
 862    (
 863       pipe_buffer_map(s->pipe, s->csc_matrix,
 864                       PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD_RANGE,
 865                       &buf_transfer),
 866       matrix,
 867       sizeof(vl_csc_matrix)
 868    );
 869
 870    pipe_buffer_unmap(s->pipe, buf_transfer);
 871 }
 872
 873 void
 874 vl_compositor_set_dst_clip(struct vl_compositor_state *s, struct u_rect *dst_clip)
 875 {
 876    assert(s);
 877
 878    s->scissor_valid = dst_clip != NULL;
 879    if (dst_clip) {
 880       s->scissor.minx = dst_clip->x0;
 881       s->scissor.miny = dst_clip->y0;
 882       s->scissor.maxx = dst_clip->x1;
 883       s->scissor.maxy = dst_clip->y1;
 884    }
 885 }
 886
 887 void
 888 vl_compositor_set_layer_blend(struct vl_compositor_state *s,
 889                               unsigned layer, void *blend,
 890                               bool is_clearing)
 891 {
 892    assert(s && blend);
 893
 894    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 895
 896    s->layers[layer].clearing = is_clearing;
 897    s->layers[layer].blend = blend;
 898 }
 899
 900 void
 901 vl_compositor_set_layer_dst_area(struct vl_compositor_state *s,
 902                                  unsigned layer, struct u_rect *dst_area)
 903 {
 904    assert(s);
 905
 906    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 907
 908    s->layers[layer].viewport_valid = dst_area != NULL;
 909    if (dst_area) {
 910       s->layers[layer].viewport.scale[0] = dst_area->x1 - dst_area->x0;
 911       s->layers[layer].viewport.scale[1] = dst_area->y1 - dst_area->y0;
 912       s->layers[layer].viewport.translate[0] = dst_area->x0;
 913       s->layers[layer].viewport.translate[1] = dst_area->y0;
 914    }
 915 }
 916
 917 void
 918 vl_compositor_set_buffer_layer(struct vl_compositor_state *s,
 919                                struct vl_compositor *c,
 920                                unsigned layer,
 921                                struct pipe_video_buffer *buffer,
 922                                struct u_rect *src_rect,
 923                                struct u_rect *dst_rect,
 924                                enum vl_compositor_deinterlace deinterlace)
 925 {
 926    struct pipe_sampler_view **sampler_views;
 927    unsigned i;
 928
 929    assert(s && c && buffer);
 930
 931    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 932
 933    s->used_layers |= 1 << layer;
 934    sampler_views = buffer->get_sampler_view_components(buffer);
 935    for (i = 0; i < 3; ++i) {
 936       s->layers[layer].samplers[i] = c->sampler_linear;
 937       pipe_sampler_view_reference(&s->layers[layer].sampler_views[i], sampler_views[i]);
 938    }
 939
 940    calc_src_and_dst(&s->layers[layer], buffer->width, buffer->height,
 941                     src_rect ? *src_rect : default_rect(&s->layers[layer]),
 942                     dst_rect ? *dst_rect : default_rect(&s->layers[layer]));
 943
 944    if (buffer->interlaced) {
 945       float half_a_line = 0.5f / s->layers[layer].zw.y;
 946       switch(deinterlace) {
 947       case VL_COMPOSITOR_WEAVE:
 948          s->layers[layer].fs = c->fs_weave;
 949          break;
 950
 951       case VL_COMPOSITOR_BOB_TOP:
 952          s->layers[layer].zw.x = 0.0f;
 953          s->layers[layer].src.tl.y += half_a_line;
 954          s->layers[layer].src.br.y += half_a_line;
 955          s->layers[layer].fs = c->fs_video_buffer;
 956          break;
 957
 958       case VL_COMPOSITOR_BOB_BOTTOM:
 959          s->layers[layer].zw.x = 1.0f;
 960          s->layers[layer].src.tl.y -= half_a_line;
 961          s->layers[layer].src.br.y -= half_a_line;
 962          s->layers[layer].fs = c->fs_video_buffer;
 963          break;
 964       }
 965
 966    } else
 967       s->layers[layer].fs = c->fs_video_buffer;
 968 }
 969
 970 void
 971 vl_compositor_set_palette_layer(struct vl_compositor_state *s,
 972                                 struct vl_compositor *c,
 973                                 unsigned layer,
 974                                 struct pipe_sampler_view *indexes,
 975                                 struct pipe_sampler_view *palette,
 976                                 struct u_rect *src_rect,
 977                                 struct u_rect *dst_rect,
 978                                 bool include_color_conversion)
 979 {
 980    assert(s && c && indexes && palette);
 981
 982    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
 983
 984    s->used_layers |= 1 << layer;
 985
 986    s->layers[layer].fs = include_color_conversion ?
 987       c->fs_palette.yuv : c->fs_palette.rgb;
 988
 989    s->layers[layer].samplers[0] = c->sampler_linear;
 990    s->layers[layer].samplers[1] = c->sampler_nearest;
 991    s->layers[layer].samplers[2] = NULL;
 992    pipe_sampler_view_reference(&s->layers[layer].sampler_views[0], indexes);
 993    pipe_sampler_view_reference(&s->layers[layer].sampler_views[1], palette);
 994    pipe_sampler_view_reference(&s->layers[layer].sampler_views[2], NULL);
 995    calc_src_and_dst(&s->layers[layer], indexes->texture->width0, indexes->texture->height0,
 996                     src_rect ? *src_rect : default_rect(&s->layers[layer]),
 997                     dst_rect ? *dst_rect : default_rect(&s->layers[layer]));
 998 }
 999
1000 void
1001 vl_compositor_set_rgba_layer(struct vl_compositor_state *s,
1002                              struct vl_compositor *c,
1003                              unsigned layer,
1004                              struct pipe_sampler_view *rgba,
1005                              struct u_rect *src_rect,
1006                              struct u_rect *dst_rect,
1007                              struct vertex4f *colors)
1008 {
1009    unsigned i;
1010
1011    assert(s && c && rgba);
1012
1013    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
1014
1015    s->used_layers |= 1 << layer;
1016    s->layers[layer].fs = c->fs_rgba;
1017    s->layers[layer].samplers[0] = c->sampler_linear;
1018    s->layers[layer].samplers[1] = NULL;
1019    s->layers[layer].samplers[2] = NULL;
1020    pipe_sampler_view_reference(&s->layers[layer].sampler_views[0], rgba);
1021    pipe_sampler_view_reference(&s->layers[layer].sampler_views[1], NULL);
1022    pipe_sampler_view_reference(&s->layers[layer].sampler_views[2], NULL);
1023    calc_src_and_dst(&s->layers[layer], rgba->texture->width0, rgba->texture->height0,
1024                     src_rect ? *src_rect : default_rect(&s->layers[layer]),
1025                     dst_rect ? *dst_rect : default_rect(&s->layers[layer]));
1026
1027    if (colors)
1028       for (i = 0; i < 4; ++i)
1029          s->layers[layer].colors[i] = colors[i];
1030 }
1031
1032 void
1033 vl_compositor_set_layer_rotation(struct vl_compositor_state *s,
1034                                  unsigned layer,
1035                                  enum vl_compositor_rotation rotate)
1036 {
1037    assert(s);
1038    assert(layer < VL_COMPOSITOR_MAX_LAYERS);
1039    s->layers[layer].rotate = rotate;
1040 }
1041
1042 void
1043 vl_compositor_render(struct vl_compositor_state *s,
1044                      struct vl_compositor       *c,
1045                      struct pipe_surface        *dst_surface,
1046                      struct u_rect              *dirty_area,
1047                      bool                        clear_dirty)
1048 {
1049    assert(c);
1050    assert(dst_surface);
1051
1052    c->fb_state.width = dst_surface->width;
1053    c->fb_state.height = dst_surface->height;
1054    c->fb_state.cbufs[0] = dst_surface;
1055
1056    if (!s->scissor_valid) {
1057       s->scissor.minx = 0;
1058       s->scissor.miny = 0;
1059       s->scissor.maxx = dst_surface->width;
1060       s->scissor.maxy = dst_surface->height;
1061    }
1062    c->pipe->set_scissor_states(c->pipe, 0, 1, &s->scissor);
1063
1064    gen_vertex_data(c, s, dirty_area);
1065
1066    if (clear_dirty && dirty_area &&
1067        (dirty_area->x0 < dirty_area->x1 || dirty_area->y0 < dirty_area->y1)) {
1068
1069       c->pipe->clear_render_target(c->pipe, dst_surface, &s->clear_color,
1070                                    0, 0, dst_surface->width, dst_surface->height);
1071       dirty_area->x0 = dirty_area->y0 = MAX_DIRTY;
1072       dirty_area->x1 = dirty_area->y1 = MIN_DIRTY;
1073    }
1074
1075    c->pipe->set_framebuffer_state(c->pipe, &c->fb_state);
1076    c->pipe->bind_vs_state(c->pipe, c->vs);
1077    c->pipe->set_vertex_buffers(c->pipe, 0, 1, &c->vertex_buf);
1078    c->pipe->bind_vertex_elements_state(c->pipe, c->vertex_elems_state);
1079    pipe_set_constant_buffer(c->pipe, PIPE_SHADER_FRAGMENT, 0, s->csc_matrix);
1080    c->pipe->bind_rasterizer_state(c->pipe, c->rast);
1081
1082    draw_layers(c, s, dirty_area);
1083 }
1084
1085 bool
1086 vl_compositor_init(struct vl_compositor *c, struct pipe_context *pipe)
1087 {
1088    assert(c);
1089
1090    memset(c, 0, sizeof(*c));
1091
1092    c->pipe = pipe;
1093
1094    c->upload = u_upload_create(pipe, 128 * 1024, 4, PIPE_BIND_VERTEX_BUFFER);
1095
1096    if (!c->upload)
1097       return false;
1098
1099    if (!init_pipe_state(c)) {
1100       u_upload_destroy(c->upload);
1101       return false;
1102    }
1103
1104    if (!init_shaders(c)) {
1105       u_upload_destroy(c->upload);
1106       cleanup_pipe_state(c);
1107       return false;
1108    }
1109
1110    if (!init_buffers(c)) {
1111       u_upload_destroy(c->upload);
1112       cleanup_shaders(c);
1113       cleanup_pipe_state(c);
1114       return false;
1115    }
1116
1117    return true;
1118 }
1119
1120 bool
1121 vl_compositor_init_state(struct vl_compositor_state *s, struct pipe_context *pipe)
1122 {
1123    vl_csc_matrix csc_matrix;
1124
1125    assert(s);
1126
1127    memset(s, 0, sizeof(*s));
1128
1129    s->pipe = pipe;
1130
1131    s->clear_color.f[0] = s->clear_color.f[1] = 0.0f;
1132    s->clear_color.f[2] = s->clear_color.f[3] = 0.0f;
1133
1134    /*
1135     * Create our fragment shader's constant buffer
1136     * Const buffer contains the color conversion matrix and bias vectors
1137     */
1138    /* XXX: Create with IMMUTABLE/STATIC... although it does change every once in a long while... */
1139    s->csc_matrix = pipe_buffer_create
1140    (
1141       pipe->screen,
1142       PIPE_BIND_CONSTANT_BUFFER,
1143       PIPE_USAGE_DEFAULT,
1144       sizeof(csc_matrix)
1145    );
1146
1147    vl_compositor_clear_layers(s);
1148
1149    vl_csc_get_matrix(VL_CSC_COLOR_STANDARD_IDENTITY, NULL, true, &csc_matrix);
1150    vl_compositor_set_csc_matrix(s, (const vl_csc_matrix *)&csc_matrix);
1151
1152    return true;
1153 }
1154
1155 void
1156 vl_compositor_cleanup_state(struct vl_compositor_state *s)
1157 {
1158    assert(s);
1159
1160    vl_compositor_clear_layers(s);
1161    pipe_resource_reference(&s->csc_matrix, NULL);
1162 }