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, resource_copy_region,
  30  * and resource_fill_region functions.
  31  *
  32  * @author Marek Olšák
  33  */
  34
  35 #include "pipe/p_context.h"
  36 #include "pipe/p_defines.h"
  37 #include "util/u_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_sampler.h"
  48 #include "util/u_simple_shaders.h"
  49 #include "util/u_surface.h"
  50 #include "util/u_texture.h"
  51
  52 #define INVALID_PTR ((void*)~0)
  53
  54 struct blitter_context_priv
  55 {
  56    struct blitter_context blitter;
  57
  58    struct pipe_context *pipe; /**< pipe context */
  59    struct pipe_resource *vbuf;  /**< quad */
  60
  61    float vertices[4][2][4];   /**< {pos, color} or {pos, texcoord} */
  62
  63    /* Templates for various state objects. */
  64    struct pipe_sampler_state template_sampler_state;
  65
  66    /* Constant state objects. */
  67    /* Vertex shaders. */
  68    void *vs_col; /**< Vertex shader which passes {pos, color} to the output */
  69    void *vs_tex; /**< Vertex shader which passes {pos, texcoord} to the output.*/
  70
  71    /* Fragment shaders. */
  72    /* The shader at index i outputs color to color buffers 0,1,...,i-1. */
  73    void *fs_col[PIPE_MAX_COLOR_BUFS+1];
  74
  75    /* FS which outputs a color from a texture,
  76       where the index is PIPE_TEXTURE_* to be sampled. */
  77    void *fs_texfetch_col[PIPE_MAX_TEXTURE_TYPES];
  78
  79    /* FS which outputs a depth from a texture,
  80       where the index is PIPE_TEXTURE_* to be sampled. */
  81    void *fs_texfetch_depth[PIPE_MAX_TEXTURE_TYPES];
  82
  83    /* Blend state. */
  84    void *blend_write_color;   /**< blend state with writemask of RGBA */
  85    void *blend_keep_color;    /**< blend state with writemask of 0 */
  86
  87    /* Depth stencil alpha state. */
  88    void *dsa_write_depth_stencil;
  89    void *dsa_write_depth_keep_stencil;
  90    void *dsa_keep_depth_stencil;
  91
  92    void *velem_state;
  93
  94    /* Sampler state for clamping to a miplevel. */
  95    void *sampler_state[PIPE_MAX_TEXTURE_LEVELS];
  96
  97    /* Rasterizer state. */
  98    void *rs_state;
  99
 100    struct pipe_sampler_view *sampler_view;
 101
 102    /* Viewport state. */
 103    struct pipe_viewport_state viewport;
 104
 105    /* Clip state. */
 106    struct pipe_clip_state clip;
 107 };
 108
 109 struct blitter_context *util_blitter_create(struct pipe_context *pipe)
 110 {
 111    struct blitter_context_priv *ctx;
 112    struct pipe_blend_state blend;
 113    struct pipe_depth_stencil_alpha_state dsa;
 114    struct pipe_rasterizer_state rs_state;
 115    struct pipe_sampler_state *sampler_state;
 116    struct pipe_vertex_element velem[2];
 117    unsigned i;
 118
 119    ctx = CALLOC_STRUCT(blitter_context_priv);
 120    if (!ctx)
 121       return NULL;
 122
 123    ctx->pipe = pipe;
 124
 125    /* init state objects for them to be considered invalid */
 126    ctx->blitter.saved_blend_state = INVALID_PTR;
 127    ctx->blitter.saved_dsa_state = INVALID_PTR;
 128    ctx->blitter.saved_rs_state = INVALID_PTR;
 129    ctx->blitter.saved_fs = INVALID_PTR;
 130    ctx->blitter.saved_vs = INVALID_PTR;
 131    ctx->blitter.saved_velem_state = INVALID_PTR;
 132    ctx->blitter.saved_fb_state.nr_cbufs = ~0;
 133    ctx->blitter.saved_num_sampler_views = ~0;
 134    ctx->blitter.saved_num_sampler_states = ~0;
 135    ctx->blitter.saved_num_vertex_buffers = ~0;
 136
 137    /* blend state objects */
 138    memset(&blend, 0, sizeof(blend));
 139    ctx->blend_keep_color = pipe->create_blend_state(pipe, &blend);
 140
 141    blend.rt[0].colormask = PIPE_MASK_RGBA;
 142    ctx->blend_write_color = pipe->create_blend_state(pipe, &blend);
 143
 144    /* depth stencil alpha state objects */
 145    memset(&dsa, 0, sizeof(dsa));
 146    ctx->dsa_keep_depth_stencil =
 147       pipe->create_depth_stencil_alpha_state(pipe, &dsa);
 148
 149    dsa.depth.enabled = 1;
 150    dsa.depth.writemask = 1;
 151    dsa.depth.func = PIPE_FUNC_ALWAYS;
 152    ctx->dsa_write_depth_keep_stencil =
 153       pipe->create_depth_stencil_alpha_state(pipe, &dsa);
 154
 155    dsa.stencil[0].enabled = 1;
 156    dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
 157    dsa.stencil[0].fail_op = PIPE_STENCIL_OP_REPLACE;
 158    dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
 159    dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_REPLACE;
 160    dsa.stencil[0].valuemask = 0xff;
 161    dsa.stencil[0].writemask = 0xff;
 162    ctx->dsa_write_depth_stencil =
 163       pipe->create_depth_stencil_alpha_state(pipe, &dsa);
 164    /* The DSA state objects which write depth and stencil are created
 165     * on-demand. */
 166
 167    /* sampler state */
 168    sampler_state = &ctx->template_sampler_state;
 169    sampler_state->wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 170    sampler_state->wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 171    sampler_state->wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 172    sampler_state->normalized_coords = TRUE;
 173    /* The sampler state objects which sample from a specified mipmap level
 174     * are created on-demand. */
 175
 176    /* rasterizer state */
 177    memset(&rs_state, 0, sizeof(rs_state));
 178    rs_state.cull_face = PIPE_FACE_NONE;
 179    rs_state.gl_rasterization_rules = 1;
 180    rs_state.flatshade = 1;
 181    ctx->rs_state = pipe->create_rasterizer_state(pipe, &rs_state);
 182
 183    /* vertex elements state */
 184    memset(&velem[0], 0, sizeof(velem[0]) * 2);
 185    for (i = 0; i < 2; i++) {
 186       velem[i].src_offset = i * 4 * sizeof(float);
 187       velem[i].instance_divisor = 0;
 188       velem[i].vertex_buffer_index = 0;
 189       velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 190    }
 191    ctx->velem_state = pipe->create_vertex_elements_state(pipe, 2, &velem[0]);
 192
 193    /* fragment shaders are created on-demand */
 194
 195    /* vertex shaders */
 196    {
 197       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 198                                       TGSI_SEMANTIC_COLOR };
 199       const uint semantic_indices[] = { 0, 0 };
 200       ctx->vs_col =
 201          util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 202                                              semantic_indices);
 203    }
 204    {
 205       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 206                                       TGSI_SEMANTIC_GENERIC };
 207       const uint semantic_indices[] = { 0, 0 };
 208       ctx->vs_tex =
 209          util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 210                                              semantic_indices);
 211    }
 212
 213    /* set invariant vertex coordinates */
 214    for (i = 0; i < 4; i++)
 215       ctx->vertices[i][0][3] = 1; /*v.w*/
 216
 217    /* create the vertex buffer */
 218    ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
 219                                   PIPE_BIND_VERTEX_BUFFER,
 220                                   sizeof(ctx->vertices));
 221
 222    return &ctx->blitter;
 223 }
 224
 225 void util_blitter_destroy(struct blitter_context *blitter)
 226 {
 227    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 228    struct pipe_context *pipe = ctx->pipe;
 229    int i;
 230
 231    pipe->delete_blend_state(pipe, ctx->blend_write_color);
 232    pipe->delete_blend_state(pipe, ctx->blend_keep_color);
 233    pipe->delete_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 234    pipe->delete_depth_stencil_alpha_state(pipe,
 235                                           ctx->dsa_write_depth_keep_stencil);
 236    pipe->delete_depth_stencil_alpha_state(pipe, ctx->dsa_write_depth_stencil);
 237
 238    pipe->delete_rasterizer_state(pipe, ctx->rs_state);
 239    pipe->delete_vs_state(pipe, ctx->vs_col);
 240    pipe->delete_vs_state(pipe, ctx->vs_tex);
 241    pipe->delete_vertex_elements_state(pipe, ctx->velem_state);
 242
 243    for (i = 0; i < PIPE_MAX_TEXTURE_TYPES; i++) {
 244       if (ctx->fs_texfetch_col[i])
 245          pipe->delete_fs_state(pipe, ctx->fs_texfetch_col[i]);
 246       if (ctx->fs_texfetch_depth[i])
 247          pipe->delete_fs_state(pipe, ctx->fs_texfetch_depth[i]);
 248    }
 249
 250    for (i = 0; i <= PIPE_MAX_COLOR_BUFS && ctx->fs_col[i]; i++)
 251       if (ctx->fs_col[i])
 252          pipe->delete_fs_state(pipe, ctx->fs_col[i]);
 253
 254    for (i = 0; i < PIPE_MAX_TEXTURE_LEVELS; i++)
 255       if (ctx->sampler_state[i])
 256          pipe->delete_sampler_state(pipe, ctx->sampler_state[i]);
 257
 258    if (ctx->sampler_view) {
 259       pipe_sampler_view_reference(&ctx->sampler_view, NULL);
 260    }
 261
 262    pipe_resource_reference(&ctx->vbuf, NULL);
 263    FREE(ctx);
 264 }
 265
 266 static void blitter_check_saved_CSOs(struct blitter_context_priv *ctx)
 267 {
 268    /* make sure these CSOs have been saved */
 269    assert(ctx->blitter.saved_blend_state != INVALID_PTR &&
 270           ctx->blitter.saved_dsa_state != INVALID_PTR &&
 271           ctx->blitter.saved_rs_state != INVALID_PTR &&
 272           ctx->blitter.saved_fs != INVALID_PTR &&
 273           ctx->blitter.saved_vs != INVALID_PTR &&
 274           ctx->blitter.saved_velem_state != INVALID_PTR);
 275 }
 276
 277 static void blitter_restore_CSOs(struct blitter_context_priv *ctx)
 278 {
 279    struct pipe_context *pipe = ctx->pipe;
 280
 281    /* restore the state objects which are always required to be saved */
 282    pipe->bind_blend_state(pipe, ctx->blitter.saved_blend_state);
 283    pipe->bind_depth_stencil_alpha_state(pipe, ctx->blitter.saved_dsa_state);
 284    pipe->bind_rasterizer_state(pipe, ctx->blitter.saved_rs_state);
 285    pipe->bind_fs_state(pipe, ctx->blitter.saved_fs);
 286    pipe->bind_vs_state(pipe, ctx->blitter.saved_vs);
 287    pipe->bind_vertex_elements_state(pipe, ctx->blitter.saved_velem_state);
 288
 289    ctx->blitter.saved_blend_state = INVALID_PTR;
 290    ctx->blitter.saved_dsa_state = INVALID_PTR;
 291    ctx->blitter.saved_rs_state = INVALID_PTR;
 292    ctx->blitter.saved_fs = INVALID_PTR;
 293    ctx->blitter.saved_vs = INVALID_PTR;
 294    ctx->blitter.saved_velem_state = INVALID_PTR;
 295
 296    pipe->set_stencil_ref(pipe, &ctx->blitter.saved_stencil_ref);
 297
 298    pipe->set_viewport_state(pipe, &ctx->blitter.saved_viewport);
 299    pipe->set_clip_state(pipe, &ctx->blitter.saved_clip);
 300
 301    /* restore the state objects which are required to be saved before copy/fill
 302     */
 303    if (ctx->blitter.saved_fb_state.nr_cbufs != ~0) {
 304       pipe->set_framebuffer_state(pipe, &ctx->blitter.saved_fb_state);
 305       ctx->blitter.saved_fb_state.nr_cbufs = ~0;
 306    }
 307
 308    if (ctx->blitter.saved_num_sampler_states != ~0) {
 309       pipe->bind_fragment_sampler_states(pipe,
 310                                          ctx->blitter.saved_num_sampler_states,
 311                                          ctx->blitter.saved_sampler_states);
 312       ctx->blitter.saved_num_sampler_states = ~0;
 313    }
 314
 315    if (ctx->blitter.saved_num_sampler_views != ~0) {
 316       pipe->set_fragment_sampler_views(pipe,
 317                                        ctx->blitter.saved_num_sampler_views,
 318                                        ctx->blitter.saved_sampler_views);
 319       ctx->blitter.saved_num_sampler_views = ~0;
 320    }
 321
 322    if (ctx->blitter.saved_num_vertex_buffers != ~0) {
 323       pipe->set_vertex_buffers(pipe,
 324                                        ctx->blitter.saved_num_vertex_buffers,
 325                                        ctx->blitter.saved_vertex_buffers);
 326       ctx->blitter.saved_num_vertex_buffers = ~0;
 327    }
 328 }
 329
 330 static void blitter_set_rectangle(struct blitter_context_priv *ctx,
 331                                   unsigned x1, unsigned y1,
 332                                   unsigned x2, unsigned y2,
 333                                   unsigned width, unsigned height,
 334                                   float depth)
 335 {
 336    int i;
 337
 338    /* set vertex positions */
 339    ctx->vertices[0][0][0] = (float)x1 / width * 2.0f - 1.0f; /*v0.x*/
 340    ctx->vertices[0][0][1] = (float)y1 / height * 2.0f - 1.0f; /*v0.y*/
 341
 342    ctx->vertices[1][0][0] = (float)x2 / width * 2.0f - 1.0f; /*v1.x*/
 343    ctx->vertices[1][0][1] = (float)y1 / height * 2.0f - 1.0f; /*v1.y*/
 344
 345    ctx->vertices[2][0][0] = (float)x2 / width * 2.0f - 1.0f; /*v2.x*/
 346    ctx->vertices[2][0][1] = (float)y2 / height * 2.0f - 1.0f; /*v2.y*/
 347
 348    ctx->vertices[3][0][0] = (float)x1 / width * 2.0f - 1.0f; /*v3.x*/
 349    ctx->vertices[3][0][1] = (float)y2 / height * 2.0f - 1.0f; /*v3.y*/
 350
 351    for (i = 0; i < 4; i++)
 352       ctx->vertices[i][0][2] = depth; /*z*/
 353
 354    /* viewport */
 355    ctx->viewport.scale[0] = 0.5f * width;
 356    ctx->viewport.scale[1] = 0.5f * height;
 357    ctx->viewport.scale[2] = 1.0f;
 358    ctx->viewport.scale[3] = 1.0f;
 359    ctx->viewport.translate[0] = 0.5f * width;
 360    ctx->viewport.translate[1] = 0.5f * height;
 361    ctx->viewport.translate[2] = 0.0f;
 362    ctx->viewport.translate[3] = 0.0f;
 363    ctx->pipe->set_viewport_state(ctx->pipe, &ctx->viewport);
 364
 365    /* clip */
 366    ctx->pipe->set_clip_state(ctx->pipe, &ctx->clip);
 367 }
 368
 369 static void blitter_set_clear_color(struct blitter_context_priv *ctx,
 370                                     const float *rgba)
 371 {
 372    int i;
 373
 374    for (i = 0; i < 4; i++) {
 375       ctx->vertices[i][1][0] = rgba[0];
 376       ctx->vertices[i][1][1] = rgba[1];
 377       ctx->vertices[i][1][2] = rgba[2];
 378       ctx->vertices[i][1][3] = rgba[3];
 379    }
 380 }
 381
 382 static void blitter_set_texcoords_2d(struct blitter_context_priv *ctx,
 383                                      struct pipe_surface *surf,
 384                                      unsigned x1, unsigned y1,
 385                                      unsigned x2, unsigned y2)
 386 {
 387    int i;
 388    float s1 = x1 / (float)surf->width;
 389    float t1 = y1 / (float)surf->height;
 390    float s2 = x2 / (float)surf->width;
 391    float t2 = y2 / (float)surf->height;
 392
 393    ctx->vertices[0][1][0] = s1; /*t0.s*/
 394    ctx->vertices[0][1][1] = t1; /*t0.t*/
 395
 396    ctx->vertices[1][1][0] = s2; /*t1.s*/
 397    ctx->vertices[1][1][1] = t1; /*t1.t*/
 398
 399    ctx->vertices[2][1][0] = s2; /*t2.s*/
 400    ctx->vertices[2][1][1] = t2; /*t2.t*/
 401
 402    ctx->vertices[3][1][0] = s1; /*t3.s*/
 403    ctx->vertices[3][1][1] = t2; /*t3.t*/
 404
 405    for (i = 0; i < 4; i++) {
 406       ctx->vertices[i][1][2] = 0; /*r*/
 407       ctx->vertices[i][1][3] = 1; /*q*/
 408    }
 409 }
 410
 411 static void blitter_set_texcoords_3d(struct blitter_context_priv *ctx,
 412                                      struct pipe_surface *surf,
 413                                      unsigned x1, unsigned y1,
 414                                      unsigned x2, unsigned y2)
 415 {
 416    int i;
 417    float depth = u_minify(surf->texture->depth0, surf->level);
 418    float r = surf->zslice / depth;
 419
 420    blitter_set_texcoords_2d(ctx, surf, x1, y1, x2, y2);
 421
 422    for (i = 0; i < 4; i++)
 423       ctx->vertices[i][1][2] = r; /*r*/
 424 }
 425
 426 static void blitter_set_texcoords_cube(struct blitter_context_priv *ctx,
 427                                        struct pipe_surface *surf,
 428                                        unsigned x1, unsigned y1,
 429                                        unsigned x2, unsigned y2)
 430 {
 431    int i;
 432    float s1 = x1 / (float)surf->width;
 433    float t1 = y1 / (float)surf->height;
 434    float s2 = x2 / (float)surf->width;
 435    float t2 = y2 / (float)surf->height;
 436    float st[4][2];
 437
 438    st[0][0] = s1;
 439    st[0][1] = t1;
 440    st[1][0] = s2;
 441    st[1][1] = t1;
 442    st[2][0] = s2;
 443    st[2][1] = t2;
 444    st[3][0] = s1;
 445    st[3][1] = t2;
 446
 447    util_map_texcoords2d_onto_cubemap(surf->face,
 448                                      /* pointer, stride in floats */
 449                                      &st[0][0], 2,
 450                                      &ctx->vertices[0][1][0], 8);
 451
 452    for (i = 0; i < 4; i++)
 453       ctx->vertices[i][1][3] = 1; /*q*/
 454 }
 455
 456 static void blitter_draw_quad(struct blitter_context_priv *ctx)
 457 {
 458    struct pipe_context *pipe = ctx->pipe;
 459
 460    /* write vertices and draw them */
 461    pipe_buffer_write(pipe, ctx->vbuf,
 462                      0, sizeof(ctx->vertices), ctx->vertices);
 463
 464    util_draw_vertex_buffer(pipe, ctx->vbuf, 0, PIPE_PRIM_TRIANGLE_FAN,
 465                            4,  /* verts */
 466                            2); /* attribs/vert */
 467 }
 468
 469 static INLINE
 470 void **blitter_get_sampler_state(struct blitter_context_priv *ctx,
 471                                  int miplevel)
 472 {
 473    struct pipe_context *pipe = ctx->pipe;
 474    struct pipe_sampler_state *sampler_state = &ctx->template_sampler_state;
 475
 476    assert(miplevel < PIPE_MAX_TEXTURE_LEVELS);
 477
 478    /* Create the sampler state on-demand. */
 479    if (!ctx->sampler_state[miplevel]) {
 480       sampler_state->lod_bias = miplevel;
 481       sampler_state->min_lod = miplevel;
 482       sampler_state->max_lod = miplevel;
 483
 484       ctx->sampler_state[miplevel] = pipe->create_sampler_state(pipe,
 485                                                                 sampler_state);
 486    }
 487
 488    /* Return void** so that it can be passed to bind_fragment_sampler_states
 489     * directly. */
 490    return &ctx->sampler_state[miplevel];
 491 }
 492
 493 static INLINE
 494 void *blitter_get_fs_col(struct blitter_context_priv *ctx, unsigned num_cbufs)
 495 {
 496    struct pipe_context *pipe = ctx->pipe;
 497
 498    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 499
 500    if (!ctx->fs_col[num_cbufs])
 501       ctx->fs_col[num_cbufs] =
 502          util_make_fragment_clonecolor_shader(pipe, num_cbufs);
 503
 504    return ctx->fs_col[num_cbufs];
 505 }
 506
 507 static INLINE
 508 void *blitter_get_fs_texfetch_col(struct blitter_context_priv *ctx,
 509                                   unsigned tex_target)
 510 {
 511    struct pipe_context *pipe = ctx->pipe;
 512
 513    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 514
 515    /* Create the fragment shader on-demand. */
 516    if (!ctx->fs_texfetch_col[tex_target]) {
 517       switch (tex_target) {
 518          case PIPE_TEXTURE_1D:
 519             ctx->fs_texfetch_col[PIPE_TEXTURE_1D] =
 520                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_1D);
 521             break;
 522          case PIPE_TEXTURE_2D:
 523             ctx->fs_texfetch_col[PIPE_TEXTURE_2D] =
 524                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D);
 525             break;
 526          case PIPE_TEXTURE_3D:
 527             ctx->fs_texfetch_col[PIPE_TEXTURE_3D] =
 528                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_3D);
 529             break;
 530          case PIPE_TEXTURE_CUBE:
 531             ctx->fs_texfetch_col[PIPE_TEXTURE_CUBE] =
 532                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_CUBE);
 533             break;
 534          default:;
 535       }
 536    }
 537
 538    return ctx->fs_texfetch_col[tex_target];
 539 }
 540
 541 static INLINE
 542 void *blitter_get_fs_texfetch_depth(struct blitter_context_priv *ctx,
 543                                     unsigned tex_target)
 544 {
 545    struct pipe_context *pipe = ctx->pipe;
 546
 547    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 548
 549    /* Create the fragment shader on-demand. */
 550    if (!ctx->fs_texfetch_depth[tex_target]) {
 551       switch (tex_target) {
 552          case PIPE_TEXTURE_1D:
 553             ctx->fs_texfetch_depth[PIPE_TEXTURE_1D] =
 554                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_1D);
 555             break;
 556          case PIPE_TEXTURE_2D:
 557             ctx->fs_texfetch_depth[PIPE_TEXTURE_2D] =
 558                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_2D);
 559             break;
 560          case PIPE_TEXTURE_3D:
 561             ctx->fs_texfetch_depth[PIPE_TEXTURE_3D] =
 562                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_3D);
 563             break;
 564          case PIPE_TEXTURE_CUBE:
 565             ctx->fs_texfetch_depth[PIPE_TEXTURE_CUBE] =
 566                util_make_fragment_tex_shader_writedepth(pipe,TGSI_TEXTURE_CUBE);
 567             break;
 568          default:;
 569       }
 570    }
 571
 572    return ctx->fs_texfetch_depth[tex_target];
 573 }
 574
 575 void util_blitter_clear(struct blitter_context *blitter,
 576                         unsigned width, unsigned height,
 577                         unsigned num_cbufs,
 578                         unsigned clear_buffers,
 579                         const float *rgba,
 580                         double depth, unsigned stencil)
 581 {
 582    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 583    struct pipe_context *pipe = ctx->pipe;
 584    struct pipe_stencil_ref sr = { { 0 } };
 585
 586    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 587
 588    blitter_check_saved_CSOs(ctx);
 589
 590    /* bind CSOs */
 591    if (clear_buffers & PIPE_CLEAR_COLOR)
 592       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 593    else
 594       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 595
 596    if (clear_buffers & PIPE_CLEAR_DEPTHSTENCIL) {
 597       sr.ref_value[0] = stencil & 0xff;
 598       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_write_depth_stencil);
 599       pipe->set_stencil_ref(pipe, &sr);
 600    }
 601    else
 602       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 603
 604    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 605    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 606    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, num_cbufs));
 607    pipe->bind_vs_state(pipe, ctx->vs_col);
 608
 609    blitter_set_clear_color(ctx, rgba);
 610    blitter_set_rectangle(ctx, 0, 0, width, height, width, height, depth);
 611    blitter_draw_quad(ctx);
 612    blitter_restore_CSOs(ctx);
 613 }
 614
 615 static boolean
 616 is_overlap(unsigned sx1, unsigned sx2, unsigned sy1, unsigned sy2,
 617            unsigned dx1, unsigned dx2, unsigned dy1, unsigned dy2)
 618 {
 619     if (sx1 >= dx2 || sx2 <= dx1 || sy1 >= dy2 || sy2 <= dy1) {
 620         return FALSE;
 621     } else {
 622         return TRUE;
 623     }
 624 }
 625
 626 static void util_blitter_do_copy(struct blitter_context *blitter,
 627                                  struct pipe_surface *dst,
 628                                  unsigned dstx, unsigned dsty,
 629                                  struct pipe_surface *src,
 630                                  unsigned srcx, unsigned srcy,
 631                                  unsigned width, unsigned height,
 632                                  boolean is_depth)
 633 {
 634    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 635    struct pipe_context *pipe = ctx->pipe;
 636    struct pipe_framebuffer_state fb_state;
 637    struct pipe_sampler_view viewTempl, *view;
 638
 639    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 640    assert(blitter->saved_num_sampler_views != ~0);
 641    assert(blitter->saved_num_sampler_states != ~0);
 642    assert(src->texture->target < PIPE_MAX_TEXTURE_TYPES);
 643
 644    /* bind CSOs */
 645    fb_state.width = dst->width;
 646    fb_state.height = dst->height;
 647
 648    if (is_depth) {
 649       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 650       pipe->bind_depth_stencil_alpha_state(pipe,
 651                                            ctx->dsa_write_depth_keep_stencil);
 652       pipe->bind_fs_state(pipe,
 653          blitter_get_fs_texfetch_depth(ctx, src->texture->target));
 654
 655       fb_state.nr_cbufs = 0;
 656       fb_state.zsbuf = dst;
 657    } else {
 658       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 659       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 660       pipe->bind_fs_state(pipe,
 661          blitter_get_fs_texfetch_col(ctx, src->texture->target));
 662
 663       fb_state.nr_cbufs = 1;
 664       fb_state.cbufs[0] = dst;
 665       fb_state.zsbuf = 0;
 666    }
 667
 668    u_sampler_view_default_template(&viewTempl,
 669                                    src->texture,
 670                                    src->texture->format);
 671    view = pipe->create_sampler_view(pipe,
 672                                     src->texture,
 673                                     &viewTempl);
 674
 675    if (ctx->sampler_view) {
 676       pipe_sampler_view_reference(&ctx->sampler_view, NULL);
 677    }
 678    ctx->sampler_view = view;
 679
 680    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 681    pipe->bind_vs_state(pipe, ctx->vs_tex);
 682    pipe->bind_fragment_sampler_states(pipe, 1,
 683       blitter_get_sampler_state(ctx, src->level));
 684    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 685    pipe->set_fragment_sampler_views(pipe, 1, &view);
 686    pipe->set_framebuffer_state(pipe, &fb_state);
 687
 688    /* set texture coordinates */
 689    switch (src->texture->target) {
 690       case PIPE_TEXTURE_1D:
 691       case PIPE_TEXTURE_2D:
 692          blitter_set_texcoords_2d(ctx, src, srcx, srcy,
 693                                   srcx+width, srcy+height);
 694          break;
 695       case PIPE_TEXTURE_3D:
 696          blitter_set_texcoords_3d(ctx, src, srcx, srcy,
 697                                   srcx+width, srcy+height);
 698          break;
 699       case PIPE_TEXTURE_CUBE:
 700          blitter_set_texcoords_cube(ctx, src, srcx, srcy,
 701                                     srcx+width, srcy+height);
 702          break;
 703       default:
 704          assert(0);
 705    }
 706
 707    blitter_set_rectangle(ctx, dstx, dsty, dstx+width, dsty+height, dst->width, dst->height, 0);
 708    blitter_draw_quad(ctx);
 709
 710 }
 711
 712
 713 void util_blitter_copy(struct blitter_context *blitter,
 714                        struct pipe_surface *dst,
 715                        unsigned dstx, unsigned dsty,
 716                        struct pipe_surface *src,
 717                        unsigned srcx, unsigned srcy,
 718                        unsigned width, unsigned height,
 719                        boolean ignore_stencil)
 720 {
 721    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 722    struct pipe_context *pipe = ctx->pipe;
 723    struct pipe_screen *screen = pipe->screen;
 724    boolean is_stencil, is_depth;
 725    unsigned dst_tex_usage;
 726
 727    /* give up if textures are not set */
 728    assert(dst->texture && src->texture);
 729    if (!dst->texture || !src->texture)
 730       return;
 731
 732    if (dst->texture == src->texture) {
 733       assert(!is_overlap(srcx, srcx + width, srcy, srcy + height,
 734              dstx, dstx + width, dsty, dsty + height));
 735    }
 736
 737    is_depth = util_format_get_component_bits(src->format, UTIL_FORMAT_COLORSPACE_ZS, 0) != 0;
 738    is_stencil = util_format_get_component_bits(src->format, UTIL_FORMAT_COLORSPACE_ZS, 1) != 0;
 739    dst_tex_usage = is_depth || is_stencil ? PIPE_BIND_DEPTH_STENCIL :
 740                                             PIPE_BIND_RENDER_TARGET;
 741
 742    /* check if we can sample from and render to the surfaces */
 743    /* (assuming copying a stencil buffer is not possible) */
 744    if ((!ignore_stencil && is_stencil) ||
 745        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 746                                     dst->texture->nr_samples, dst_tex_usage, 0) ||
 747        !screen->is_format_supported(screen, src->format, src->texture->target,
 748                                     src->texture->nr_samples, PIPE_BIND_SAMPLER_VIEW, 0)) {
 749       struct pipe_subresource subdst, subsrc;
 750       subdst.face = dst->face;
 751       subdst.level = dst->level;
 752       subsrc.face = src->face;
 753       subsrc.level = src->level;
 754       util_resource_copy_region(pipe, dst->texture, subdst, dstx, dsty, dst->zslice,
 755                                 src->texture, subsrc, srcx, srcy, src->zslice,
 756                                 width, height);
 757       return;
 758    }
 759
 760    /* check whether the states are properly saved */
 761    blitter_check_saved_CSOs(ctx);
 762    util_blitter_do_copy(blitter,
 763                         dst, dstx, dsty,
 764                         src, srcx, srcy,
 765                         width, height, is_depth);
 766    blitter_restore_CSOs(ctx);
 767 }
 768
 769 void util_blitter_fill(struct blitter_context *blitter,
 770                        struct pipe_surface *dst,
 771                        unsigned dstx, unsigned dsty,
 772                        unsigned width, unsigned height,
 773                        unsigned value)
 774 {
 775    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 776    struct pipe_context *pipe = ctx->pipe;
 777    struct pipe_screen *screen = pipe->screen;
 778    struct pipe_framebuffer_state fb_state;
 779    float rgba[4];
 780    ubyte ub_rgba[4] = {0};
 781    union util_color color;
 782    int i;
 783
 784    assert(dst->texture);
 785    if (!dst->texture)
 786       return;
 787
 788    /* check if we can render to the surface */
 789    if (util_format_is_depth_or_stencil(dst->format) || /* unlikely, but you never know */
 790        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 791                                     dst->texture->nr_samples,
 792                                     PIPE_BIND_RENDER_TARGET, 0)) {
 793       struct pipe_subresource subdst;
 794       subdst.face = dst->face;
 795       subdst.level = dst->level;
 796       util_resource_fill_region(pipe, dst->texture, subdst, dstx, dsty,
 797                                 dst->zslice, width, height, value);
 798       return;
 799    }
 800
 801    /* unpack the color */
 802    color.ui = value;
 803    util_unpack_color_ub(dst->format, &color,
 804                         ub_rgba, ub_rgba+1, ub_rgba+2, ub_rgba+3);
 805    for (i = 0; i < 4; i++)
 806       rgba[i] = ubyte_to_float(ub_rgba[i]);
 807
 808    /* check the saved state */
 809    blitter_check_saved_CSOs(ctx);
 810    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 811
 812    /* bind CSOs */
 813    pipe->bind_blend_state(pipe, ctx->blend_write_color);
 814    pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 815    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 816    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 1));
 817    pipe->bind_vs_state(pipe, ctx->vs_col);
 818    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 819
 820    /* set a framebuffer state */
 821    fb_state.width = dst->width;
 822    fb_state.height = dst->height;
 823    fb_state.nr_cbufs = 1;
 824    fb_state.cbufs[0] = dst;
 825    fb_state.zsbuf = 0;
 826    pipe->set_framebuffer_state(pipe, &fb_state);
 827
 828    blitter_set_clear_color(ctx, rgba);
 829    blitter_set_rectangle(ctx, 0, 0, width, height, dst->width, dst->height, 0);
 830    blitter_draw_quad(ctx);
 831    blitter_restore_CSOs(ctx);
 832 }