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