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 pipe_context *pipe = ctx->pipe;
 389
 390    /* write vertices and draw them */
 391    pipe_buffer_write(pipe->screen, ctx->vbuf,
 392                      0, sizeof(ctx->vertices), ctx->vertices);
 393
 394    util_draw_vertex_buffer(pipe, ctx->vbuf, 0, PIPE_PRIM_TRIANGLE_FAN,
 395                            4,  /* verts */
 396                            2); /* attribs/vert */
 397 }
 398
 399 static INLINE
 400 void *blitter_get_state_write_depth_stencil(
 401                struct blitter_context_priv *ctx,
 402                unsigned stencil)
 403 {
 404    struct pipe_context *pipe = ctx->pipe;
 405
 406    stencil &= 0xff;
 407
 408    /* Create the DSA state on-demand. */
 409    if (!ctx->dsa_write_depth_stencil[stencil]) {
 410       ctx->template_dsa.stencil[0].ref_value = stencil;
 411
 412       ctx->dsa_write_depth_stencil[stencil] =
 413          pipe->create_depth_stencil_alpha_state(pipe, &ctx->template_dsa);
 414    }
 415
 416    return ctx->dsa_write_depth_stencil[stencil];
 417 }
 418
 419 static INLINE
 420 void **blitter_get_sampler_state(struct blitter_context_priv *ctx,
 421                                  int miplevel)
 422 {
 423    struct pipe_context *pipe = ctx->pipe;
 424    struct pipe_sampler_state *sampler_state = &ctx->template_sampler_state;
 425
 426    assert(miplevel < PIPE_MAX_TEXTURE_LEVELS);
 427
 428    /* Create the sampler state on-demand. */
 429    if (!ctx->sampler_state[miplevel]) {
 430       sampler_state->lod_bias = miplevel;
 431       sampler_state->min_lod = miplevel;
 432       sampler_state->max_lod = miplevel;
 433
 434       ctx->sampler_state[miplevel] = pipe->create_sampler_state(pipe,
 435                                                                 sampler_state);
 436    }
 437
 438    /* Return void** so that it can be passed to bind_fragment_sampler_states
 439     * directly. */
 440    return &ctx->sampler_state[miplevel];
 441 }
 442
 443 static INLINE
 444 void *blitter_get_fs_col(struct blitter_context_priv *ctx, unsigned num_cbufs)
 445 {
 446    struct pipe_context *pipe = ctx->pipe;
 447    unsigned index = num_cbufs ? num_cbufs - 1 : 0;
 448
 449    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 450
 451    if (!ctx->fs_col[index])
 452       ctx->fs_col[index] =
 453          util_make_fragment_clonecolor_shader(pipe, num_cbufs);
 454
 455    return ctx->fs_col[index];
 456 }
 457
 458 static INLINE
 459 void *blitter_get_fs_texfetch_col(struct blitter_context_priv *ctx,
 460                                   unsigned tex_target)
 461 {
 462    struct pipe_context *pipe = ctx->pipe;
 463
 464    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 465
 466    /* Create the fragment shader on-demand. */
 467    if (!ctx->fs_texfetch_col[tex_target]) {
 468       switch (tex_target) {
 469          case PIPE_TEXTURE_1D:
 470             ctx->fs_texfetch_col[PIPE_TEXTURE_1D] =
 471                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_1D);
 472             break;
 473          case PIPE_TEXTURE_2D:
 474             ctx->fs_texfetch_col[PIPE_TEXTURE_2D] =
 475                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D);
 476             break;
 477          case PIPE_TEXTURE_3D:
 478             ctx->fs_texfetch_col[PIPE_TEXTURE_3D] =
 479                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_3D);
 480             break;
 481          case PIPE_TEXTURE_CUBE:
 482             ctx->fs_texfetch_col[PIPE_TEXTURE_CUBE] =
 483                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_CUBE);
 484             break;
 485          default:;
 486       }
 487    }
 488
 489    return ctx->fs_texfetch_col[tex_target];
 490 }
 491
 492 static INLINE
 493 void *blitter_get_fs_texfetch_depth(struct blitter_context_priv *ctx,
 494                                     unsigned tex_target)
 495 {
 496    struct pipe_context *pipe = ctx->pipe;
 497
 498    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 499
 500    /* Create the fragment shader on-demand. */
 501    if (!ctx->fs_texfetch_depth[tex_target]) {
 502       switch (tex_target) {
 503          case PIPE_TEXTURE_1D:
 504             ctx->fs_texfetch_depth[PIPE_TEXTURE_1D] =
 505                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_1D);
 506             break;
 507          case PIPE_TEXTURE_2D:
 508             ctx->fs_texfetch_depth[PIPE_TEXTURE_2D] =
 509                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_2D);
 510             break;
 511          case PIPE_TEXTURE_3D:
 512             ctx->fs_texfetch_depth[PIPE_TEXTURE_3D] =
 513                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_3D);
 514             break;
 515          case PIPE_TEXTURE_CUBE:
 516             ctx->fs_texfetch_depth[PIPE_TEXTURE_CUBE] =
 517                util_make_fragment_tex_shader_writedepth(pipe,TGSI_TEXTURE_CUBE);
 518             break;
 519          default:;
 520       }
 521    }
 522
 523    return ctx->fs_texfetch_depth[tex_target];
 524 }
 525
 526 void util_blitter_clear(struct blitter_context *blitter,
 527                         unsigned width, unsigned height,
 528                         unsigned num_cbufs,
 529                         unsigned clear_buffers,
 530                         const float *rgba,
 531                         double depth, unsigned stencil)
 532 {
 533    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 534    struct pipe_context *pipe = ctx->pipe;
 535
 536    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 537
 538    blitter_check_saved_CSOs(ctx);
 539
 540    /* bind CSOs */
 541    if (clear_buffers & PIPE_CLEAR_COLOR)
 542       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 543    else
 544       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 545
 546    if (clear_buffers & PIPE_CLEAR_DEPTHSTENCIL)
 547       pipe->bind_depth_stencil_alpha_state(pipe,
 548          blitter_get_state_write_depth_stencil(ctx, stencil));
 549    else
 550       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 551
 552    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 553    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, num_cbufs));
 554    pipe->bind_vs_state(pipe, ctx->vs_col);
 555
 556    blitter_set_clear_color(ctx, rgba);
 557    blitter_set_rectangle(ctx, 0, 0, width, height, depth);
 558    blitter_draw_quad(ctx);
 559    blitter_restore_CSOs(ctx);
 560 }
 561
 562 void util_blitter_copy(struct blitter_context *blitter,
 563                        struct pipe_surface *dst,
 564                        unsigned dstx, unsigned dsty,
 565                        struct pipe_surface *src,
 566                        unsigned srcx, unsigned srcy,
 567                        unsigned width, unsigned height,
 568                        boolean ignore_stencil)
 569 {
 570    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 571    struct pipe_context *pipe = ctx->pipe;
 572    struct pipe_screen *screen = pipe->screen;
 573    struct pipe_framebuffer_state fb_state;
 574    boolean is_stencil, is_depth;
 575    unsigned dst_tex_usage;
 576
 577    /* give up if textures are not set */
 578    assert(dst->texture && src->texture);
 579    if (!dst->texture || !src->texture)
 580       return;
 581
 582    is_depth = pf_get_component_bits(src->format, PIPE_FORMAT_COMP_Z) != 0;
 583    is_stencil = pf_get_component_bits(src->format, PIPE_FORMAT_COMP_S) != 0;
 584    dst_tex_usage = is_depth || is_stencil ? PIPE_TEXTURE_USAGE_DEPTH_STENCIL :
 585                                             PIPE_TEXTURE_USAGE_RENDER_TARGET;
 586
 587    /* check if we can sample from and render to the surfaces */
 588    /* (assuming copying a stencil buffer is not possible) */
 589    if ((!ignore_stencil && is_stencil) ||
 590        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 591                                     dst_tex_usage, 0) ||
 592        !screen->is_format_supported(screen, src->format, src->texture->target,
 593                                     PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 594       util_surface_copy(pipe, FALSE, dst, dstx, dsty, src, srcx, srcy,
 595                         width, height);
 596       return;
 597    }
 598
 599    /* check whether the states are properly saved */
 600    blitter_check_saved_CSOs(ctx);
 601    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 602    assert(blitter->saved_num_textures != ~0);
 603    assert(blitter->saved_num_sampler_states != ~0);
 604    assert(src->texture->target < PIPE_MAX_TEXTURE_TYPES);
 605
 606    /* bind CSOs */
 607    fb_state.width = dst->width;
 608    fb_state.height = dst->height;
 609
 610    if (is_depth) {
 611       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 612       pipe->bind_depth_stencil_alpha_state(pipe,
 613                                            ctx->dsa_write_depth_keep_stencil);
 614       pipe->bind_fs_state(pipe,
 615          blitter_get_fs_texfetch_depth(ctx, src->texture->target));
 616
 617       fb_state.nr_cbufs = 0;
 618       fb_state.zsbuf = dst;
 619    } else {
 620       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 621       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 622       pipe->bind_fs_state(pipe,
 623          blitter_get_fs_texfetch_col(ctx, src->texture->target));
 624
 625       fb_state.nr_cbufs = 1;
 626       fb_state.cbufs[0] = dst;
 627       fb_state.zsbuf = 0;
 628    }
 629
 630    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 631    pipe->bind_vs_state(pipe, ctx->vs_tex);
 632    pipe->bind_fragment_sampler_states(pipe, 1,
 633       blitter_get_sampler_state(ctx, src->level));
 634    pipe->set_fragment_sampler_textures(pipe, 1, &src->texture);
 635    pipe->set_framebuffer_state(pipe, &fb_state);
 636
 637    /* set texture coordinates */
 638    switch (src->texture->target) {
 639       case PIPE_TEXTURE_1D:
 640       case PIPE_TEXTURE_2D:
 641          blitter_set_texcoords_2d(ctx, src, srcx, srcy,
 642                                   srcx+width, srcy+height);
 643          break;
 644       case PIPE_TEXTURE_3D:
 645          blitter_set_texcoords_3d(ctx, src, srcx, srcy,
 646                                   srcx+width, srcy+height);
 647          break;
 648       case PIPE_TEXTURE_CUBE:
 649          blitter_set_texcoords_cube(ctx, src, srcx, srcy,
 650                                     srcx+width, srcy+height);
 651          break;
 652       default:
 653          assert(0);
 654    }
 655
 656    blitter_set_rectangle(ctx, dstx, dsty, dstx+width, dsty+height, 0);
 657    blitter_draw_quad(ctx);
 658    blitter_restore_CSOs(ctx);
 659 }
 660
 661 void util_blitter_fill(struct blitter_context *blitter,
 662                        struct pipe_surface *dst,
 663                        unsigned dstx, unsigned dsty,
 664                        unsigned width, unsigned height,
 665                        unsigned value)
 666 {
 667    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 668    struct pipe_context *pipe = ctx->pipe;
 669    struct pipe_screen *screen = pipe->screen;
 670    struct pipe_framebuffer_state fb_state;
 671    float rgba[4];
 672    ubyte ub_rgba[4] = {0};
 673    union util_color color;
 674    int i;
 675
 676    assert(dst->texture);
 677    if (!dst->texture)
 678       return;
 679
 680    /* check if we can render to the surface */
 681    if (pf_is_depth_or_stencil(dst->format) || /* unlikely, but you never know */
 682        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 683                                     PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) {
 684       util_surface_fill(pipe, dst, dstx, dsty, width, height, value);
 685       return;
 686    }
 687
 688    /* unpack the color */
 689    color.ui = value;
 690    util_unpack_color_ub(dst->format, &color,
 691                         ub_rgba, ub_rgba+1, ub_rgba+2, ub_rgba+3);
 692    for (i = 0; i < 4; i++)
 693       rgba[i] = ubyte_to_float(ub_rgba[i]);
 694
 695    /* check the saved state */
 696    blitter_check_saved_CSOs(ctx);
 697    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 698
 699    /* bind CSOs */
 700    pipe->bind_blend_state(pipe, ctx->blend_write_color);
 701    pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 702    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 703    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 1));
 704    pipe->bind_vs_state(pipe, ctx->vs_col);
 705
 706    /* set a framebuffer state */
 707    fb_state.width = dst->width;
 708    fb_state.height = dst->height;
 709    fb_state.nr_cbufs = 1;
 710    fb_state.cbufs[0] = dst;
 711    fb_state.zsbuf = 0;
 712    pipe->set_framebuffer_state(pipe, &fb_state);
 713
 714    blitter_set_clear_color(ctx, rgba);
 715    blitter_set_rectangle(ctx, 0, 0, width, height, 0);
 716    blitter_draw_quad(ctx);
 717    blitter_restore_CSOs(ctx);
 718 }