src/gallium/auxiliary/util/u_blitter.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 Marek Olšák <maraeo@gmail.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  20  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  **************************************************************************/
  26
  27 /**
  28  * @file
  29  * Blitter utility to facilitate acceleration of the clear, surface_copy,
  30  * and surface_fill functions.
  31  *
  32  * @author Marek Olšák
  33  */
  34
  35 #include "pipe/p_context.h"
  36 #include "pipe/p_defines.h"
  37 #include "pipe/p_inlines.h"
  38 #include "pipe/p_shader_tokens.h"
  39 #include "pipe/p_state.h"
  40
  41 #include "util/u_memory.h"
  42 #include "util/u_math.h"
  43 #include "util/u_blitter.h"
  44 #include "util/u_draw_quad.h"
  45 #include "util/u_pack_color.h"
  46 #include "util/u_rect.h"
  47 #include "util/u_simple_shaders.h"
  48 #include "util/u_texture.h"
  49
  50 struct blitter_context_priv
  51 {
  52    struct blitter_context blitter;
  53
  54    struct pipe_context *pipe; /**< pipe context */
  55    struct pipe_buffer *vbuf;  /**< quad */
  56
  57    float vertices[4][2][4];   /**< {pos, color} or {pos, texcoord} */
  58
  59    /* Templates for various state objects. */
  60    struct pipe_depth_stencil_alpha_state template_dsa;
  61    struct pipe_sampler_state template_sampler_state;
  62
  63    /* Constant state objects. */
  64    /* Vertex shaders. */
  65    void *vs_col; /**< Vertex shader which passes {pos, color} to the output */
  66    void *vs_tex; /**<Vertex shader which passes {pos, texcoord} to the output.*/
  67
  68    /* Fragment shaders. */
  69    /* FS which outputs a color to multiple color buffers. */
  70    void *fs_col[PIPE_MAX_COLOR_BUFS];
  71
  72    /* FS which outputs a color from a texture,
  73       where the index is PIPE_TEXTURE_* to be sampled. */
  74    void *fs_texfetch_col[PIPE_MAX_TEXTURE_TYPES];
  75
  76    /* FS which outputs a depth from a texture,
  77       where the index is PIPE_TEXTURE_* to be sampled. */
  78    void *fs_texfetch_depth[PIPE_MAX_TEXTURE_TYPES];
  79
  80    /* Blend state. */
  81    void *blend_write_color;   /**< blend state with writemask of RGBA */
  82    void *blend_keep_color;    /**< blend state with writemask of 0 */
  83
  84    /* Depth stencil alpha state. */
  85    void *dsa_write_depth_stencil[0xff]; /**< indices are stencil clear values */
  86    void *dsa_write_depth_keep_stencil;
  87    void *dsa_keep_depth_stencil;
  88
  89    /* Sampler state for clamping to a miplevel. */
  90    void *sampler_state[PIPE_MAX_TEXTURE_LEVELS];
  91
  92    /* Rasterizer state. */
  93    void *rs_state;
  94 };
  95
  96 struct blitter_context *util_blitter_create(struct pipe_context *pipe)
  97 {
  98    struct blitter_context_priv *ctx;
  99    struct pipe_blend_state blend;
 100    struct pipe_depth_stencil_alpha_state *dsa;
 101    struct pipe_rasterizer_state rs_state;
 102    struct pipe_sampler_state *sampler_state;
 103    unsigned i;
 104
 105    ctx = CALLOC_STRUCT(blitter_context_priv);
 106    if (!ctx)
 107       return NULL;
 108
 109    ctx->pipe = pipe;
 110
 111    /* init state objects for them to be considered invalid */
 112    ctx->blitter.saved_fb_state.nr_cbufs = ~0;
 113    ctx->blitter.saved_num_textures = ~0;
 114    ctx->blitter.saved_num_sampler_states = ~0;
 115
 116    /* blend state objects */
 117    memset(&blend, 0, sizeof(blend));
 118    ctx->blend_keep_color = pipe->create_blend_state(pipe, &blend);
 119
 120    blend.colormask = PIPE_MASK_RGBA;
 121    ctx->blend_write_color = pipe->create_blend_state(pipe, &blend);
 122
 123    /* depth stencil alpha state objects */
 124    dsa = &ctx->template_dsa;
 125    ctx->dsa_keep_depth_stencil =
 126       pipe->create_depth_stencil_alpha_state(pipe, dsa);
 127
 128    dsa->depth.enabled = 1;
 129    dsa->depth.writemask = 1;
 130    dsa->depth.func = PIPE_FUNC_ALWAYS;
 131    ctx->dsa_write_depth_keep_stencil =
 132       pipe->create_depth_stencil_alpha_state(pipe, dsa);
 133
 134    dsa->stencil[0].enabled = 1;
 135    dsa->stencil[0].func = PIPE_FUNC_ALWAYS;
 136    dsa->stencil[0].fail_op = PIPE_STENCIL_OP_REPLACE;
 137    dsa->stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
 138    dsa->stencil[0].zfail_op = PIPE_STENCIL_OP_REPLACE;
 139    dsa->stencil[0].valuemask = 0xff;
 140    dsa->stencil[0].writemask = 0xff;
 141    /* The DSA state objects which write depth and stencil are created
 142     * on-demand. */
 143
 144    /* sampler state */
 145    sampler_state = &ctx->template_sampler_state;
 146    sampler_state->wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 147    sampler_state->wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 148    sampler_state->wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 149    /* The sampler state objects which sample from a specified mipmap level
 150     * are created on-demand. */
 151
 152    /* rasterizer state */
 153    memset(&rs_state, 0, sizeof(rs_state));
 154    rs_state.front_winding = PIPE_WINDING_CW;
 155    rs_state.cull_mode = PIPE_WINDING_NONE;
 156    rs_state.bypass_vs_clip_and_viewport = 1;
 157    rs_state.gl_rasterization_rules = 1;
 158    ctx->rs_state = pipe->create_rasterizer_state(pipe, &rs_state);
 159
 160    /* fragment shaders are created on-demand */
 161
 162    /* vertex shaders */
 163    {
 164       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 165                                       TGSI_SEMANTIC_COLOR };
 166       const uint semantic_indices[] = { 0, 0 };
 167       ctx->vs_col =
 168          util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 169                                              semantic_indices);
 170    }
 171    {
 172       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 173                                       TGSI_SEMANTIC_GENERIC };
 174       const uint semantic_indices[] = { 0, 0 };
 175       ctx->vs_tex =
 176          util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 177                                              semantic_indices);
 178    }
 179
 180    /* set invariant vertex coordinates */
 181    for (i = 0; i < 4; i++)
 182       ctx->vertices[i][0][3] = 1; /*v.w*/
 183
 184    /* create the vertex buffer */
 185    ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
 186                                   32,
 187                                   PIPE_BUFFER_USAGE_VERTEX,
 188                                   sizeof(ctx->vertices));
 189
 190    return &ctx->blitter;
 191 }
 192
 193 void util_blitter_destroy(struct blitter_context *blitter)
 194 {
 195    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 196    struct pipe_context *pipe = ctx->pipe;
 197    int i;
 198
 199    pipe->delete_blend_state(pipe, ctx->blend_write_color);
 200    pipe->delete_blend_state(pipe, ctx->blend_keep_color);
 201    pipe->delete_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 202    pipe->delete_depth_stencil_alpha_state(pipe,
 203                                           ctx->dsa_write_depth_keep_stencil);
 204
 205    for (i = 0; i < 0xff; i++)
 206       if (ctx->dsa_write_depth_stencil[i])
 207          pipe->delete_depth_stencil_alpha_state(pipe,
 208             ctx->dsa_write_depth_stencil[i]);
 209
 210    pipe->delete_rasterizer_state(pipe, ctx->rs_state);
 211    pipe->delete_vs_state(pipe, ctx->vs_col);
 212    pipe->delete_vs_state(pipe, ctx->vs_tex);
 213
 214    for (i = 0; i < PIPE_MAX_TEXTURE_TYPES; i++) {
 215       if (ctx->fs_texfetch_col[i])
 216          pipe->delete_fs_state(pipe, ctx->fs_texfetch_col[i]);
 217       if (ctx->fs_texfetch_depth[i])
 218          pipe->delete_fs_state(pipe, ctx->fs_texfetch_depth[i]);
 219    }
 220
 221    for (i = 0; i < PIPE_MAX_COLOR_BUFS && ctx->fs_col[i]; i++)
 222       if (ctx->fs_col[i])
 223          pipe->delete_fs_state(pipe, ctx->fs_col[i]);
 224
 225    for (i = 0; i < PIPE_MAX_TEXTURE_LEVELS; i++)
 226       if (ctx->sampler_state[i])
 227          pipe->delete_sampler_state(pipe, ctx->sampler_state[i]);
 228
 229    pipe_buffer_reference(&ctx->vbuf, NULL);
 230    FREE(ctx);
 231 }
 232
 233 static void blitter_check_saved_CSOs(struct blitter_context_priv *ctx)
 234 {
 235    /* make sure these CSOs have been saved */
 236    assert(ctx->blitter.saved_blend_state &&
 237           ctx->blitter.saved_dsa_state &&
 238           ctx->blitter.saved_rs_state &&
 239           ctx->blitter.saved_fs &&
 240           ctx->blitter.saved_vs);
 241 }
 242
 243 static void blitter_restore_CSOs(struct blitter_context_priv *ctx)
 244 {
 245    struct pipe_context *pipe = ctx->pipe;
 246
 247    /* restore the state objects which are always required to be saved */
 248    pipe->bind_blend_state(pipe, ctx->blitter.saved_blend_state);
 249    pipe->bind_depth_stencil_alpha_state(pipe, ctx->blitter.saved_dsa_state);
 250    pipe->bind_rasterizer_state(pipe, ctx->blitter.saved_rs_state);
 251    pipe->bind_fs_state(pipe, ctx->blitter.saved_fs);
 252    pipe->bind_vs_state(pipe, ctx->blitter.saved_vs);
 253
 254    ctx->blitter.saved_blend_state = 0;
 255    ctx->blitter.saved_dsa_state = 0;
 256    ctx->blitter.saved_rs_state = 0;
 257    ctx->blitter.saved_fs = 0;
 258    ctx->blitter.saved_vs = 0;
 259
 260    /* restore the state objects which are required to be saved before copy/fill
 261     */
 262    if (ctx->blitter.saved_fb_state.nr_cbufs != ~0) {
 263       pipe->set_framebuffer_state(pipe, &ctx->blitter.saved_fb_state);
 264       ctx->blitter.saved_fb_state.nr_cbufs = ~0;
 265    }
 266
 267    if (ctx->blitter.saved_num_sampler_states != ~0) {
 268       pipe->bind_fragment_sampler_states(pipe,
 269                                          ctx->blitter.saved_num_sampler_states,
 270                                          ctx->blitter.saved_sampler_states);
 271       ctx->blitter.saved_num_sampler_states = ~0;
 272    }
 273
 274    if (ctx->blitter.saved_num_textures != ~0) {
 275       pipe->set_fragment_sampler_textures(pipe,
 276                                           ctx->blitter.saved_num_textures,
 277                                           ctx->blitter.saved_textures);
 278       ctx->blitter.saved_num_textures = ~0;
 279    }
 280 }
 281
 282 static void blitter_set_rectangle(struct blitter_context_priv *ctx,
 283                                   unsigned x1, unsigned y1,
 284                                   unsigned x2, unsigned y2,
 285                                   float depth)
 286 {
 287    int i;
 288
 289    /* set vertex positions */
 290    ctx->vertices[0][0][0] = x1; /*v0.x*/
 291    ctx->vertices[0][0][1] = y1; /*v0.y*/
 292
 293    ctx->vertices[1][0][0] = x2; /*v1.x*/
 294    ctx->vertices[1][0][1] = y1; /*v1.y*/
 295
 296    ctx->vertices[2][0][0] = x2; /*v2.x*/
 297    ctx->vertices[2][0][1] = y2; /*v2.y*/
 298
 299    ctx->vertices[3][0][0] = x1; /*v3.x*/
 300    ctx->vertices[3][0][1] = y2; /*v3.y*/
 301
 302    for (i = 0; i < 4; i++)
 303       ctx->vertices[i][0][2] = depth; /*z*/
 304 }
 305
 306 static void blitter_set_clear_color(struct blitter_context_priv *ctx,
 307                                     const float *rgba)
 308 {
 309    int i;
 310
 311    for (i = 0; i < 4; i++) {
 312       ctx->vertices[i][1][0] = rgba[0];
 313       ctx->vertices[i][1][1] = rgba[1];
 314       ctx->vertices[i][1][2] = rgba[2];
 315       ctx->vertices[i][1][3] = rgba[3];
 316    }
 317 }
 318
 319 static void blitter_set_texcoords_2d(struct blitter_context_priv *ctx,
 320                                      struct pipe_surface *surf,
 321                                      unsigned x1, unsigned y1,
 322                                      unsigned x2, unsigned y2)
 323 {
 324    int i;
 325    float s1 = x1 / (float)surf->width;
 326    float t1 = y1 / (float)surf->height;
 327    float s2 = x2 / (float)surf->width;
 328    float t2 = y2 / (float)surf->height;
 329
 330    ctx->vertices[0][1][0] = s1; /*t0.s*/
 331    ctx->vertices[0][1][1] = t1; /*t0.t*/
 332
 333    ctx->vertices[1][1][0] = s2; /*t1.s*/
 334    ctx->vertices[1][1][1] = t1; /*t1.t*/
 335
 336    ctx->vertices[2][1][0] = s2; /*t2.s*/
 337    ctx->vertices[2][1][1] = t2; /*t2.t*/
 338
 339    ctx->vertices[3][1][0] = s1; /*t3.s*/
 340    ctx->vertices[3][1][1] = t2; /*t3.t*/
 341
 342    for (i = 0; i < 4; i++) {
 343       ctx->vertices[i][1][2] = 0; /*r*/
 344       ctx->vertices[i][1][3] = 1; /*q*/
 345    }
 346 }
 347
 348 static void blitter_set_texcoords_3d(struct blitter_context_priv *ctx,
 349                                      struct pipe_surface *surf,
 350                                      unsigned x1, unsigned y1,
 351                                      unsigned x2, unsigned y2)
 352 {
 353    int i;
 354    float depth = u_minify(surf->texture->depth0, surf->level);
 355    float r = surf->zslice / depth;
 356
 357    blitter_set_texcoords_2d(ctx, surf, x1, y1, x2, y2);
 358
 359    for (i = 0; i < 4; i++)
 360       ctx->vertices[i][1][2] = r; /*r*/
 361 }
 362
 363 static void blitter_set_texcoords_cube(struct blitter_context_priv *ctx,
 364                                        struct pipe_surface *surf,
 365                                        unsigned x1, unsigned y1,
 366                                        unsigned x2, unsigned y2)
 367 {
 368    int i;
 369    float s1 = x1 / (float)surf->width;
 370    float t1 = y1 / (float)surf->height;
 371    float s2 = x2 / (float)surf->width;
 372    float t2 = y2 / (float)surf->height;
 373    const float st[4][2] = {
 374       {s1, t1}, {s2, t1}, {s2, t2}, {s1, t2}
 375    };
 376
 377    util_map_texcoords2d_onto_cubemap(surf->face,
 378                                      /* pointer, stride in floats */
 379                                      &st[0][0], 2,
 380                                      &ctx->vertices[0][1][0], 8);
 381
 382    for (i = 0; i < 4; i++)
 383       ctx->vertices[i][1][3] = 1; /*q*/
 384 }
 385
 386 static void blitter_draw_quad(struct blitter_context_priv *ctx)
 387 {
 388    struct blitter_context *blitter = &ctx->blitter;
 389    struct pipe_context *pipe = ctx->pipe;
 390
 391    if (blitter->draw_quad) {
 392       blitter->draw_quad(pipe, &ctx->vertices[0][0][0]);
 393    } else {
 394       /* write vertices and draw them */
 395       pipe_buffer_write(pipe->screen, ctx->vbuf,
 396                         0, sizeof(ctx->vertices), ctx->vertices);
 397
 398       util_draw_vertex_buffer(ctx->pipe, ctx->vbuf, 0, PIPE_PRIM_TRIANGLE_FAN,
 399                               4,  /* verts */
 400                               2); /* attribs/vert */
 401    }
 402 }
 403
 404 static INLINE
 405 void *blitter_get_state_write_depth_stencil(
 406                struct blitter_context_priv *ctx,
 407                unsigned stencil)
 408 {
 409    struct pipe_context *pipe = ctx->pipe;
 410
 411    stencil &= 0xff;
 412
 413    /* Create the DSA state on-demand. */
 414    if (!ctx->dsa_write_depth_stencil[stencil]) {
 415       ctx->template_dsa.stencil[0].ref_value = stencil;
 416
 417       ctx->dsa_write_depth_stencil[stencil] =
 418          pipe->create_depth_stencil_alpha_state(pipe, &ctx->template_dsa);
 419    }
 420
 421    return ctx->dsa_write_depth_stencil[stencil];
 422 }
 423
 424 static INLINE
 425 void **blitter_get_sampler_state(struct blitter_context_priv *ctx,
 426                                  int miplevel)
 427 {
 428    struct pipe_context *pipe = ctx->pipe;
 429    struct pipe_sampler_state *sampler_state = &ctx->template_sampler_state;
 430
 431    assert(miplevel < PIPE_MAX_TEXTURE_LEVELS);
 432
 433    /* Create the sampler state on-demand. */
 434    if (!ctx->sampler_state[miplevel]) {
 435       sampler_state->lod_bias = miplevel;
 436       sampler_state->min_lod = miplevel;
 437       sampler_state->max_lod = miplevel;
 438
 439       ctx->sampler_state[miplevel] = pipe->create_sampler_state(pipe,
 440                                                                 sampler_state);
 441    }
 442
 443    /* Return void** so that it can be passed to bind_fragment_sampler_states
 444     * directly. */
 445    return &ctx->sampler_state[miplevel];
 446 }
 447
 448 static INLINE
 449 void *blitter_get_fs_col(struct blitter_context_priv *ctx, unsigned num_cbufs)
 450 {
 451    struct pipe_context *pipe = ctx->pipe;
 452    unsigned index = num_cbufs ? num_cbufs - 1 : 0;
 453
 454    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 455
 456    if (!ctx->fs_col[index])
 457       ctx->fs_col[index] =
 458          util_make_fragment_clonecolor_shader(pipe, num_cbufs);
 459
 460    return ctx->fs_col[index];
 461 }
 462
 463 static INLINE
 464 void *blitter_get_fs_texfetch_col(struct blitter_context_priv *ctx,
 465                                   unsigned tex_target)
 466 {
 467    struct pipe_context *pipe = ctx->pipe;
 468
 469    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 470
 471    /* Create the fragment shader on-demand. */
 472    if (!ctx->fs_texfetch_col[tex_target]) {
 473       switch (tex_target) {
 474          case PIPE_TEXTURE_1D:
 475             ctx->fs_texfetch_col[PIPE_TEXTURE_1D] =
 476                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_1D);
 477             break;
 478          case PIPE_TEXTURE_2D:
 479             ctx->fs_texfetch_col[PIPE_TEXTURE_2D] =
 480                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D);
 481             break;
 482          case PIPE_TEXTURE_3D:
 483             ctx->fs_texfetch_col[PIPE_TEXTURE_3D] =
 484                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_3D);
 485             break;
 486          case PIPE_TEXTURE_CUBE:
 487             ctx->fs_texfetch_col[PIPE_TEXTURE_CUBE] =
 488                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_CUBE);
 489             break;
 490          default:;
 491       }
 492    }
 493
 494    return ctx->fs_texfetch_col[tex_target];
 495 }
 496
 497 static INLINE
 498 void *blitter_get_fs_texfetch_depth(struct blitter_context_priv *ctx,
 499                                     unsigned tex_target)
 500 {
 501    struct pipe_context *pipe = ctx->pipe;
 502
 503    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 504
 505    /* Create the fragment shader on-demand. */
 506    if (!ctx->fs_texfetch_depth[tex_target]) {
 507       switch (tex_target) {
 508          case PIPE_TEXTURE_1D:
 509             ctx->fs_texfetch_depth[PIPE_TEXTURE_1D] =
 510                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_1D);
 511             break;
 512          case PIPE_TEXTURE_2D:
 513             ctx->fs_texfetch_depth[PIPE_TEXTURE_2D] =
 514                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_2D);
 515             break;
 516          case PIPE_TEXTURE_3D:
 517             ctx->fs_texfetch_depth[PIPE_TEXTURE_3D] =
 518                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_3D);
 519             break;
 520          case PIPE_TEXTURE_CUBE:
 521             ctx->fs_texfetch_depth[PIPE_TEXTURE_CUBE] =
 522                util_make_fragment_tex_shader_writedepth(pipe,TGSI_TEXTURE_CUBE);
 523             break;
 524          default:;
 525       }
 526    }
 527
 528    return ctx->fs_texfetch_depth[tex_target];
 529 }
 530
 531 void util_blitter_clear(struct blitter_context *blitter,
 532                         unsigned width, unsigned height,
 533                         unsigned num_cbufs,
 534                         unsigned clear_buffers,
 535                         const float *rgba,
 536                         double depth, unsigned stencil)
 537 {
 538    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 539    struct pipe_context *pipe = ctx->pipe;
 540
 541    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 542
 543    blitter_check_saved_CSOs(ctx);
 544
 545    /* bind CSOs */
 546    if (clear_buffers & PIPE_CLEAR_COLOR)
 547       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 548    else
 549       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 550
 551    if (clear_buffers & PIPE_CLEAR_DEPTHSTENCIL)
 552       pipe->bind_depth_stencil_alpha_state(pipe,
 553          blitter_get_state_write_depth_stencil(ctx, stencil));
 554    else
 555       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 556
 557    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 558    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, num_cbufs));
 559    pipe->bind_vs_state(pipe, ctx->vs_col);
 560
 561    blitter_set_clear_color(ctx, rgba);
 562    blitter_set_rectangle(ctx, 0, 0, width, height, depth);
 563    blitter_draw_quad(ctx);
 564    blitter_restore_CSOs(ctx);
 565 }
 566
 567 void util_blitter_copy(struct blitter_context *blitter,
 568                        struct pipe_surface *dst,
 569                        unsigned dstx, unsigned dsty,
 570                        struct pipe_surface *src,
 571                        unsigned srcx, unsigned srcy,
 572                        unsigned width, unsigned height,
 573                        boolean ignore_stencil)
 574 {
 575    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 576    struct pipe_context *pipe = ctx->pipe;
 577    struct pipe_screen *screen = pipe->screen;
 578    struct pipe_framebuffer_state fb_state;
 579    boolean is_stencil, is_depth;
 580    unsigned dst_tex_usage;
 581
 582    /* give up if textures are not set */
 583    assert(dst->texture && src->texture);
 584    if (!dst->texture || !src->texture)
 585       return;
 586
 587    is_depth = pf_get_component_bits(src->format, PIPE_FORMAT_COMP_Z) != 0;
 588    is_stencil = pf_get_component_bits(src->format, PIPE_FORMAT_COMP_S) != 0;
 589    dst_tex_usage = is_depth || is_stencil ? PIPE_TEXTURE_USAGE_DEPTH_STENCIL :
 590                                             PIPE_TEXTURE_USAGE_RENDER_TARGET;
 591
 592    /* check if we can sample from and render to the surfaces */
 593    /* (assuming copying a stencil buffer is not possible) */
 594    if ((!ignore_stencil && is_stencil) ||
 595        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 596                                     dst_tex_usage, 0) ||
 597        !screen->is_format_supported(screen, src->format, src->texture->target,
 598                                     PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 599       util_surface_copy(pipe, FALSE, dst, dstx, dsty, src, srcx, srcy,
 600                         width, height);
 601       return;
 602    }
 603
 604    /* check whether the states are properly saved */
 605    blitter_check_saved_CSOs(ctx);
 606    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 607    assert(blitter->saved_num_textures != ~0);
 608    assert(blitter->saved_num_sampler_states != ~0);
 609    assert(src->texture->target < PIPE_MAX_TEXTURE_TYPES);
 610
 611    /* bind CSOs */
 612    fb_state.width = dst->width;
 613    fb_state.height = dst->height;
 614
 615    if (is_depth) {
 616       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 617       pipe->bind_depth_stencil_alpha_state(pipe,
 618                                            ctx->dsa_write_depth_keep_stencil);
 619       pipe->bind_fs_state(pipe,
 620          blitter_get_fs_texfetch_depth(ctx, src->texture->target));
 621
 622       fb_state.nr_cbufs = 0;
 623       fb_state.zsbuf = dst;
 624    } else {
 625       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 626       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 627       pipe->bind_fs_state(pipe,
 628          blitter_get_fs_texfetch_col(ctx, src->texture->target));
 629
 630       fb_state.nr_cbufs = 1;
 631       fb_state.cbufs[0] = dst;
 632       fb_state.zsbuf = 0;
 633    }
 634
 635    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 636    pipe->bind_vs_state(pipe, ctx->vs_tex);
 637    pipe->bind_fragment_sampler_states(pipe, 1,
 638       blitter_get_sampler_state(ctx, src->level));
 639    pipe->set_fragment_sampler_textures(pipe, 1, &src->texture);
 640    pipe->set_framebuffer_state(pipe, &fb_state);
 641
 642    /* set texture coordinates */
 643    switch (src->texture->target) {
 644       case PIPE_TEXTURE_1D:
 645       case PIPE_TEXTURE_2D:
 646          blitter_set_texcoords_2d(ctx, src, srcx, srcy,
 647                                   srcx+width, srcy+height);
 648          break;
 649       case PIPE_TEXTURE_3D:
 650          blitter_set_texcoords_3d(ctx, src, srcx, srcy,
 651                                   srcx+width, srcy+height);
 652          break;
 653       case PIPE_TEXTURE_CUBE:
 654          blitter_set_texcoords_cube(ctx, src, srcx, srcy,
 655                                     srcx+width, srcy+height);
 656          break;
 657       default:
 658          assert(0);
 659    }
 660
 661    blitter_set_rectangle(ctx, dstx, dsty, dstx+width, dsty+height, 0);
 662    blitter_draw_quad(ctx);
 663    blitter_restore_CSOs(ctx);
 664 }
 665
 666 void util_blitter_fill(struct blitter_context *blitter,
 667                        struct pipe_surface *dst,
 668                        unsigned dstx, unsigned dsty,
 669                        unsigned width, unsigned height,
 670                        unsigned value)
 671 {
 672    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 673    struct pipe_context *pipe = ctx->pipe;
 674    struct pipe_screen *screen = pipe->screen;
 675    struct pipe_framebuffer_state fb_state;
 676    float rgba[4];
 677    ubyte ub_rgba[4] = {0};
 678    union util_color color;
 679    int i;
 680
 681    assert(dst->texture);
 682    if (!dst->texture)
 683       return;
 684
 685    /* check if we can render to the surface */
 686    if (pf_is_depth_or_stencil(dst->format) || /* unlikely, but you never know */
 687        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 688                                     PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) {
 689       util_surface_fill(pipe, dst, dstx, dsty, width, height, value);
 690       return;
 691    }
 692
 693    /* unpack the color */
 694    color.ui = value;
 695    util_unpack_color_ub(dst->format, &color,
 696                         ub_rgba, ub_rgba+1, ub_rgba+2, ub_rgba+3);
 697    for (i = 0; i < 4; i++)
 698       rgba[i] = ubyte_to_float(ub_rgba[i]);
 699
 700    /* check the saved state */
 701    blitter_check_saved_CSOs(ctx);
 702    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 703
 704    /* bind CSOs */
 705    pipe->bind_blend_state(pipe, ctx->blend_write_color);
 706    pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 707    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 708    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 1));
 709    pipe->bind_vs_state(pipe, ctx->vs_col);
 710
 711    /* set a framebuffer state */
 712    fb_state.width = dst->width;
 713    fb_state.height = dst->height;
 714    fb_state.nr_cbufs = 1;
 715    fb_state.cbufs[0] = dst;
 716    fb_state.zsbuf = 0;
 717    pipe->set_framebuffer_state(pipe, &fb_state);
 718
 719    blitter_set_clear_color(ctx, rgba);
 720    blitter_set_rectangle(ctx, 0, 0, width, height, 0);
 721    blitter_draw_quad(ctx);
 722    blitter_restore_CSOs(ctx);
 723 }