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 "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_rect.h"
  48 #include "util/u_sampler.h"
  49 #include "util/u_simple_shaders.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_buffer *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    /* FS which outputs a color to multiple color buffers. */
  73    void *fs_col[PIPE_MAX_COLOR_BUFS];
  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
 136    /* blend state objects */
 137    memset(&blend, 0, sizeof(blend));
 138    ctx->blend_keep_color = pipe->create_blend_state(pipe, &blend);
 139
 140    blend.rt[0].colormask = PIPE_MASK_RGBA;
 141    ctx->blend_write_color = pipe->create_blend_state(pipe, &blend);
 142
 143    /* depth stencil alpha state objects */
 144    memset(&dsa, 0, sizeof(dsa));
 145    ctx->dsa_keep_depth_stencil =
 146       pipe->create_depth_stencil_alpha_state(pipe, &dsa);
 147
 148    dsa.depth.enabled = 1;
 149    dsa.depth.writemask = 1;
 150    dsa.depth.func = PIPE_FUNC_ALWAYS;
 151    ctx->dsa_write_depth_keep_stencil =
 152       pipe->create_depth_stencil_alpha_state(pipe, &dsa);
 153
 154    dsa.stencil[0].enabled = 1;
 155    dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
 156    dsa.stencil[0].fail_op = PIPE_STENCIL_OP_REPLACE;
 157    dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
 158    dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_REPLACE;
 159    dsa.stencil[0].valuemask = 0xff;
 160    dsa.stencil[0].writemask = 0xff;
 161    ctx->dsa_write_depth_stencil =
 162       pipe->create_depth_stencil_alpha_state(pipe, &dsa);
 163    /* The DSA state objects which write depth and stencil are created
 164     * on-demand. */
 165
 166    /* sampler state */
 167    sampler_state = &ctx->template_sampler_state;
 168    sampler_state->wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 169    sampler_state->wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 170    sampler_state->wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 171    /* The sampler state objects which sample from a specified mipmap level
 172     * are created on-demand. */
 173
 174    /* rasterizer state */
 175    memset(&rs_state, 0, sizeof(rs_state));
 176    rs_state.front_winding = PIPE_WINDING_CW;
 177    rs_state.cull_mode = PIPE_WINDING_NONE;
 178    rs_state.gl_rasterization_rules = 1;
 179    rs_state.flatshade = 1;
 180    ctx->rs_state = pipe->create_rasterizer_state(pipe, &rs_state);
 181
 182    /* vertex elements state */
 183    memset(&velem[0], 0, sizeof(velem[0]) * 2);
 184    for (i = 0; i < 2; i++) {
 185       velem[i].src_offset = i * 4 * sizeof(float);
 186       velem[i].instance_divisor = 0;
 187       velem[i].vertex_buffer_index = 0;
 188       velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 189    }
 190    ctx->velem_state = pipe->create_vertex_elements_state(pipe, 2, &velem[0]);
 191
 192    /* fragment shaders are created on-demand */
 193
 194    /* vertex shaders */
 195    {
 196       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 197                                       TGSI_SEMANTIC_COLOR };
 198       const uint semantic_indices[] = { 0, 0 };
 199       ctx->vs_col =
 200          util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 201                                              semantic_indices);
 202    }
 203    {
 204       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 205                                       TGSI_SEMANTIC_GENERIC };
 206       const uint semantic_indices[] = { 0, 0 };
 207       ctx->vs_tex =
 208          util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 209                                              semantic_indices);
 210    }
 211
 212    /* set invariant vertex coordinates */
 213    for (i = 0; i < 4; i++)
 214       ctx->vertices[i][0][3] = 1; /*v.w*/
 215
 216    /* create the vertex buffer */
 217    ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
 218                                   32,
 219                                   PIPE_BUFFER_USAGE_VERTEX,
 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_buffer_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
 323 static void blitter_set_rectangle(struct blitter_context_priv *ctx,
 324                                   unsigned x1, unsigned y1,
 325                                   unsigned x2, unsigned y2,
 326                                   unsigned width, unsigned height,
 327                                   float depth)
 328 {
 329    int i;
 330
 331    /* set vertex positions */
 332    ctx->vertices[0][0][0] = (float)x1 / width * 2.0f - 1.0f; /*v0.x*/
 333    ctx->vertices[0][0][1] = (float)y1 / height * 2.0f - 1.0f; /*v0.y*/
 334
 335    ctx->vertices[1][0][0] = (float)x2 / width * 2.0f - 1.0f; /*v1.x*/
 336    ctx->vertices[1][0][1] = (float)y1 / height * 2.0f - 1.0f; /*v1.y*/
 337
 338    ctx->vertices[2][0][0] = (float)x2 / width * 2.0f - 1.0f; /*v2.x*/
 339    ctx->vertices[2][0][1] = (float)y2 / height * 2.0f - 1.0f; /*v2.y*/
 340
 341    ctx->vertices[3][0][0] = (float)x1 / width * 2.0f - 1.0f; /*v3.x*/
 342    ctx->vertices[3][0][1] = (float)y2 / height * 2.0f - 1.0f; /*v3.y*/
 343
 344    for (i = 0; i < 4; i++)
 345       ctx->vertices[i][0][2] = depth; /*z*/
 346
 347    /* viewport */
 348    ctx->viewport.scale[0] = 0.5f * width;
 349    ctx->viewport.scale[1] = 0.5f * height;
 350    ctx->viewport.scale[2] = 1.0f;
 351    ctx->viewport.scale[3] = 1.0f;
 352    ctx->viewport.translate[0] = 0.5f * width;
 353    ctx->viewport.translate[1] = 0.5f * height;
 354    ctx->viewport.translate[2] = 0.0f;
 355    ctx->viewport.translate[3] = 0.0f;
 356    ctx->pipe->set_viewport_state(ctx->pipe, &ctx->viewport);
 357
 358    /* clip */
 359    ctx->pipe->set_clip_state(ctx->pipe, &ctx->clip);
 360 }
 361
 362 static void blitter_set_clear_color(struct blitter_context_priv *ctx,
 363                                     const float *rgba)
 364 {
 365    int i;
 366
 367    for (i = 0; i < 4; i++) {
 368       ctx->vertices[i][1][0] = rgba[0];
 369       ctx->vertices[i][1][1] = rgba[1];
 370       ctx->vertices[i][1][2] = rgba[2];
 371       ctx->vertices[i][1][3] = rgba[3];
 372    }
 373 }
 374
 375 static void blitter_set_texcoords_2d(struct blitter_context_priv *ctx,
 376                                      struct pipe_surface *surf,
 377                                      unsigned x1, unsigned y1,
 378                                      unsigned x2, unsigned y2)
 379 {
 380    int i;
 381    float s1 = x1 / (float)surf->width;
 382    float t1 = y1 / (float)surf->height;
 383    float s2 = x2 / (float)surf->width;
 384    float t2 = y2 / (float)surf->height;
 385
 386    ctx->vertices[0][1][0] = s1; /*t0.s*/
 387    ctx->vertices[0][1][1] = t1; /*t0.t*/
 388
 389    ctx->vertices[1][1][0] = s2; /*t1.s*/
 390    ctx->vertices[1][1][1] = t1; /*t1.t*/
 391
 392    ctx->vertices[2][1][0] = s2; /*t2.s*/
 393    ctx->vertices[2][1][1] = t2; /*t2.t*/
 394
 395    ctx->vertices[3][1][0] = s1; /*t3.s*/
 396    ctx->vertices[3][1][1] = t2; /*t3.t*/
 397
 398    for (i = 0; i < 4; i++) {
 399       ctx->vertices[i][1][2] = 0; /*r*/
 400       ctx->vertices[i][1][3] = 1; /*q*/
 401    }
 402 }
 403
 404 static void blitter_set_texcoords_3d(struct blitter_context_priv *ctx,
 405                                      struct pipe_surface *surf,
 406                                      unsigned x1, unsigned y1,
 407                                      unsigned x2, unsigned y2)
 408 {
 409    int i;
 410    float depth = u_minify(surf->texture->depth0, surf->level);
 411    float r = surf->zslice / depth;
 412
 413    blitter_set_texcoords_2d(ctx, surf, x1, y1, x2, y2);
 414
 415    for (i = 0; i < 4; i++)
 416       ctx->vertices[i][1][2] = r; /*r*/
 417 }
 418
 419 static void blitter_set_texcoords_cube(struct blitter_context_priv *ctx,
 420                                        struct pipe_surface *surf,
 421                                        unsigned x1, unsigned y1,
 422                                        unsigned x2, unsigned y2)
 423 {
 424    int i;
 425    float s1 = x1 / (float)surf->width;
 426    float t1 = y1 / (float)surf->height;
 427    float s2 = x2 / (float)surf->width;
 428    float t2 = y2 / (float)surf->height;
 429    float st[4][2];
 430
 431    st[0][0] = s1;
 432    st[0][1] = t1;
 433    st[1][0] = s2;
 434    st[1][1] = t1;
 435    st[2][0] = s2;
 436    st[2][1] = t2;
 437    st[3][0] = s1;
 438    st[3][1] = t2;
 439
 440    util_map_texcoords2d_onto_cubemap(surf->face,
 441                                      /* pointer, stride in floats */
 442                                      &st[0][0], 2,
 443                                      &ctx->vertices[0][1][0], 8);
 444
 445    for (i = 0; i < 4; i++)
 446       ctx->vertices[i][1][3] = 1; /*q*/
 447 }
 448
 449 static void blitter_draw_quad(struct blitter_context_priv *ctx)
 450 {
 451    struct pipe_context *pipe = ctx->pipe;
 452
 453    /* write vertices and draw them */
 454    pipe_buffer_write(pipe->screen, ctx->vbuf,
 455                      0, sizeof(ctx->vertices), ctx->vertices);
 456
 457    util_draw_vertex_buffer(pipe, ctx->vbuf, 0, PIPE_PRIM_TRIANGLE_FAN,
 458                            4,  /* verts */
 459                            2); /* attribs/vert */
 460 }
 461
 462 static INLINE
 463 void **blitter_get_sampler_state(struct blitter_context_priv *ctx,
 464                                  int miplevel)
 465 {
 466    struct pipe_context *pipe = ctx->pipe;
 467    struct pipe_sampler_state *sampler_state = &ctx->template_sampler_state;
 468
 469    assert(miplevel < PIPE_MAX_TEXTURE_LEVELS);
 470
 471    /* Create the sampler state on-demand. */
 472    if (!ctx->sampler_state[miplevel]) {
 473       sampler_state->lod_bias = miplevel;
 474       sampler_state->min_lod = miplevel;
 475       sampler_state->max_lod = miplevel;
 476
 477       ctx->sampler_state[miplevel] = pipe->create_sampler_state(pipe,
 478                                                                 sampler_state);
 479    }
 480
 481    /* Return void** so that it can be passed to bind_fragment_sampler_states
 482     * directly. */
 483    return &ctx->sampler_state[miplevel];
 484 }
 485
 486 static INLINE
 487 void *blitter_get_fs_col(struct blitter_context_priv *ctx, unsigned num_cbufs)
 488 {
 489    struct pipe_context *pipe = ctx->pipe;
 490    unsigned index = num_cbufs ? num_cbufs - 1 : 0;
 491
 492    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 493
 494    if (!ctx->fs_col[index])
 495       ctx->fs_col[index] =
 496          util_make_fragment_clonecolor_shader(pipe, num_cbufs);
 497
 498    return ctx->fs_col[index];
 499 }
 500
 501 static INLINE
 502 void *blitter_get_fs_texfetch_col(struct blitter_context_priv *ctx,
 503                                   unsigned tex_target)
 504 {
 505    struct pipe_context *pipe = ctx->pipe;
 506
 507    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 508
 509    /* Create the fragment shader on-demand. */
 510    if (!ctx->fs_texfetch_col[tex_target]) {
 511       switch (tex_target) {
 512          case PIPE_TEXTURE_1D:
 513             ctx->fs_texfetch_col[PIPE_TEXTURE_1D] =
 514                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_1D);
 515             break;
 516          case PIPE_TEXTURE_2D:
 517             ctx->fs_texfetch_col[PIPE_TEXTURE_2D] =
 518                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D);
 519             break;
 520          case PIPE_TEXTURE_3D:
 521             ctx->fs_texfetch_col[PIPE_TEXTURE_3D] =
 522                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_3D);
 523             break;
 524          case PIPE_TEXTURE_CUBE:
 525             ctx->fs_texfetch_col[PIPE_TEXTURE_CUBE] =
 526                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_CUBE);
 527             break;
 528          default:;
 529       }
 530    }
 531
 532    return ctx->fs_texfetch_col[tex_target];
 533 }
 534
 535 static INLINE
 536 void *blitter_get_fs_texfetch_depth(struct blitter_context_priv *ctx,
 537                                     unsigned tex_target)
 538 {
 539    struct pipe_context *pipe = ctx->pipe;
 540
 541    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 542
 543    /* Create the fragment shader on-demand. */
 544    if (!ctx->fs_texfetch_depth[tex_target]) {
 545       switch (tex_target) {
 546          case PIPE_TEXTURE_1D:
 547             ctx->fs_texfetch_depth[PIPE_TEXTURE_1D] =
 548                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_1D);
 549             break;
 550          case PIPE_TEXTURE_2D:
 551             ctx->fs_texfetch_depth[PIPE_TEXTURE_2D] =
 552                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_2D);
 553             break;
 554          case PIPE_TEXTURE_3D:
 555             ctx->fs_texfetch_depth[PIPE_TEXTURE_3D] =
 556                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_3D);
 557             break;
 558          case PIPE_TEXTURE_CUBE:
 559             ctx->fs_texfetch_depth[PIPE_TEXTURE_CUBE] =
 560                util_make_fragment_tex_shader_writedepth(pipe,TGSI_TEXTURE_CUBE);
 561             break;
 562          default:;
 563       }
 564    }
 565
 566    return ctx->fs_texfetch_depth[tex_target];
 567 }
 568
 569 void util_blitter_clear(struct blitter_context *blitter,
 570                         unsigned width, unsigned height,
 571                         unsigned num_cbufs,
 572                         unsigned clear_buffers,
 573                         const float *rgba,
 574                         double depth, unsigned stencil)
 575 {
 576    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 577    struct pipe_context *pipe = ctx->pipe;
 578    struct pipe_stencil_ref sr = { { 0 } };
 579
 580    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 581
 582    blitter_check_saved_CSOs(ctx);
 583
 584    /* bind CSOs */
 585    if (clear_buffers & PIPE_CLEAR_COLOR)
 586       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 587    else
 588       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 589
 590    if (clear_buffers & PIPE_CLEAR_DEPTHSTENCIL) {
 591       sr.ref_value[0] = stencil & 0xff;
 592       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_write_depth_stencil);
 593       pipe->set_stencil_ref(pipe, &sr);
 594    }
 595    else
 596       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 597
 598    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 599    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 600    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, num_cbufs));
 601    pipe->bind_vs_state(pipe, ctx->vs_col);
 602
 603    blitter_set_clear_color(ctx, rgba);
 604    blitter_set_rectangle(ctx, 0, 0, width, height, width, height, depth);
 605    blitter_draw_quad(ctx);
 606    blitter_restore_CSOs(ctx);
 607 }
 608
 609 static boolean
 610 is_overlap(unsigned sx1, unsigned sx2, unsigned sy1, unsigned sy2,
 611            unsigned dx1, unsigned dx2, unsigned dy1, unsigned dy2)
 612 {
 613     if (sx1 >= dx2 || sx2 <= dx1 || sy1 >= dy2 || sy2 <= dy1) {
 614         return FALSE;
 615     } else {
 616         return TRUE;
 617     }
 618 }
 619
 620 static void util_blitter_do_copy(struct blitter_context *blitter,
 621                                  struct pipe_surface *dst,
 622                                  unsigned dstx, unsigned dsty,
 623                                  struct pipe_surface *src,
 624                                  unsigned srcx, unsigned srcy,
 625                                  unsigned width, unsigned height,
 626                                  boolean is_depth)
 627 {
 628    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 629    struct pipe_context *pipe = ctx->pipe;
 630    struct pipe_framebuffer_state fb_state;
 631    struct pipe_sampler_view viewTempl, *view;
 632
 633    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 634    assert(blitter->saved_num_sampler_views != ~0);
 635    assert(blitter->saved_num_sampler_states != ~0);
 636    assert(src->texture->target < PIPE_MAX_TEXTURE_TYPES);
 637
 638    /* bind CSOs */
 639    fb_state.width = dst->width;
 640    fb_state.height = dst->height;
 641
 642    if (is_depth) {
 643       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 644       pipe->bind_depth_stencil_alpha_state(pipe,
 645                                            ctx->dsa_write_depth_keep_stencil);
 646       pipe->bind_fs_state(pipe,
 647          blitter_get_fs_texfetch_depth(ctx, src->texture->target));
 648
 649       fb_state.nr_cbufs = 0;
 650       fb_state.zsbuf = dst;
 651    } else {
 652       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 653       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 654       pipe->bind_fs_state(pipe,
 655          blitter_get_fs_texfetch_col(ctx, src->texture->target));
 656
 657       fb_state.nr_cbufs = 1;
 658       fb_state.cbufs[0] = dst;
 659       fb_state.zsbuf = 0;
 660    }
 661
 662    u_sampler_view_default_template(&viewTempl,
 663                                    src->texture,
 664                                    src->texture->format);
 665    view = pipe->create_sampler_view(pipe,
 666                                     src->texture,
 667                                     &viewTempl);
 668
 669    if (ctx->sampler_view) {
 670       pipe_sampler_view_reference(&ctx->sampler_view, NULL);
 671    }
 672    ctx->sampler_view = view;
 673
 674    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 675    pipe->bind_vs_state(pipe, ctx->vs_tex);
 676    pipe->bind_fragment_sampler_states(pipe, 1,
 677       blitter_get_sampler_state(ctx, src->level));
 678    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 679    pipe->set_fragment_sampler_views(pipe, 1, &view);
 680    pipe->set_framebuffer_state(pipe, &fb_state);
 681
 682    /* set texture coordinates */
 683    switch (src->texture->target) {
 684       case PIPE_TEXTURE_1D:
 685       case PIPE_TEXTURE_2D:
 686          blitter_set_texcoords_2d(ctx, src, srcx, srcy,
 687                                   srcx+width, srcy+height);
 688          break;
 689       case PIPE_TEXTURE_3D:
 690          blitter_set_texcoords_3d(ctx, src, srcx, srcy,
 691                                   srcx+width, srcy+height);
 692          break;
 693       case PIPE_TEXTURE_CUBE:
 694          blitter_set_texcoords_cube(ctx, src, srcx, srcy,
 695                                     srcx+width, srcy+height);
 696          break;
 697       default:
 698          assert(0);
 699    }
 700
 701    blitter_set_rectangle(ctx, dstx, dsty, dstx+width, dsty+height, dst->width, dst->height, 0);
 702    blitter_draw_quad(ctx);
 703
 704 }
 705
 706 static void util_blitter_overlap_copy(struct blitter_context *blitter,
 707                                       struct pipe_surface *dst,
 708                                       unsigned dstx, unsigned dsty,
 709                                       struct pipe_surface *src,
 710                                       unsigned srcx, unsigned srcy,
 711                                       unsigned width, unsigned height)
 712 {
 713    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 714    struct pipe_context *pipe = ctx->pipe;
 715    struct pipe_screen *screen = pipe->screen;
 716
 717    struct pipe_texture texTemp;
 718    struct pipe_texture *texture;
 719    struct pipe_surface *tex_surf;
 720
 721    /* check whether the states are properly saved */
 722    blitter_check_saved_CSOs(ctx);
 723
 724    memset(&texTemp, 0, sizeof(texTemp));
 725    texTemp.target = PIPE_TEXTURE_2D;
 726    texTemp.format = dst->texture->format; /* XXX verify supported by driver! */
 727    texTemp.last_level = 0;
 728    texTemp.width0 = width;
 729    texTemp.height0 = height;
 730    texTemp.depth0 = 1;
 731
 732    texture = screen->texture_create(screen, &texTemp);
 733    if (!texture)
 734       return;
 735
 736    tex_surf = screen->get_tex_surface(screen, texture, 0, 0, 0,
 737                                       PIPE_BUFFER_USAGE_GPU_READ |
 738                                       PIPE_BUFFER_USAGE_GPU_WRITE);
 739
 740    /* blit from the src to the temp */
 741    util_blitter_do_copy(blitter, tex_surf, 0, 0,
 742                         src, srcx, srcy,
 743                         width, height,
 744                         FALSE);
 745    util_blitter_do_copy(blitter, dst, dstx, dsty,
 746                         tex_surf, 0, 0,
 747                         width, height,
 748                         FALSE);
 749    pipe_surface_reference(&tex_surf, NULL);
 750    pipe_texture_reference(&texture, NULL);
 751    blitter_restore_CSOs(ctx);
 752 }
 753
 754 void util_blitter_copy(struct blitter_context *blitter,
 755                        struct pipe_surface *dst,
 756                        unsigned dstx, unsigned dsty,
 757                        struct pipe_surface *src,
 758                        unsigned srcx, unsigned srcy,
 759                        unsigned width, unsigned height,
 760                        boolean ignore_stencil)
 761 {
 762    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 763    struct pipe_context *pipe = ctx->pipe;
 764    struct pipe_screen *screen = pipe->screen;
 765    boolean is_stencil, is_depth;
 766    unsigned dst_tex_usage;
 767
 768    /* give up if textures are not set */
 769    assert(dst->texture && src->texture);
 770    if (!dst->texture || !src->texture)
 771       return;
 772
 773    if (dst->texture == src->texture) {
 774       if (is_overlap(srcx, srcx + width, srcy, srcy + height,
 775                              dstx, dstx + width, dsty, dsty + height)) {
 776          util_blitter_overlap_copy(blitter, dst, dstx, dsty, src, srcx, srcy,
 777                                    width, height);
 778          return;
 779       }
 780    }
 781
 782    is_depth = util_format_get_component_bits(src->format, UTIL_FORMAT_COLORSPACE_ZS, 0) != 0;
 783    is_stencil = util_format_get_component_bits(src->format, UTIL_FORMAT_COLORSPACE_ZS, 1) != 0;
 784    dst_tex_usage = is_depth || is_stencil ? PIPE_TEXTURE_USAGE_DEPTH_STENCIL :
 785                                             PIPE_TEXTURE_USAGE_RENDER_TARGET;
 786
 787    /* check if we can sample from and render to the surfaces */
 788    /* (assuming copying a stencil buffer is not possible) */
 789    if ((!ignore_stencil && is_stencil) ||
 790        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 791                                     dst_tex_usage, 0) ||
 792        !screen->is_format_supported(screen, src->format, src->texture->target,
 793                                     PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 794       util_surface_copy(pipe, FALSE, dst, dstx, dsty, src, srcx, srcy,
 795                         width, height);
 796       return;
 797    }
 798
 799    /* check whether the states are properly saved */
 800    blitter_check_saved_CSOs(ctx);
 801    util_blitter_do_copy(blitter,
 802                         dst, dstx, dsty,
 803                         src, srcx, srcy,
 804                         width, height, is_depth);
 805    blitter_restore_CSOs(ctx);
 806 }
 807
 808 void util_blitter_fill(struct blitter_context *blitter,
 809                        struct pipe_surface *dst,
 810                        unsigned dstx, unsigned dsty,
 811                        unsigned width, unsigned height,
 812                        unsigned value)
 813 {
 814    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 815    struct pipe_context *pipe = ctx->pipe;
 816    struct pipe_screen *screen = pipe->screen;
 817    struct pipe_framebuffer_state fb_state;
 818    float rgba[4];
 819    ubyte ub_rgba[4] = {0};
 820    union util_color color;
 821    int i;
 822
 823    assert(dst->texture);
 824    if (!dst->texture)
 825       return;
 826
 827    /* check if we can render to the surface */
 828    if (util_format_is_depth_or_stencil(dst->format) || /* unlikely, but you never know */
 829        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 830                                     PIPE_TEXTURE_USAGE_RENDER_TARGET, 0)) {
 831       util_surface_fill(pipe, dst, dstx, dsty, width, height, value);
 832       return;
 833    }
 834
 835    /* unpack the color */
 836    color.ui = value;
 837    util_unpack_color_ub(dst->format, &color,
 838                         ub_rgba, ub_rgba+1, ub_rgba+2, ub_rgba+3);
 839    for (i = 0; i < 4; i++)
 840       rgba[i] = ubyte_to_float(ub_rgba[i]);
 841
 842    /* check the saved state */
 843    blitter_check_saved_CSOs(ctx);
 844    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 845
 846    /* bind CSOs */
 847    pipe->bind_blend_state(pipe, ctx->blend_write_color);
 848    pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 849    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 850    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 1));
 851    pipe->bind_vs_state(pipe, ctx->vs_col);
 852    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 853
 854    /* set a framebuffer state */
 855    fb_state.width = dst->width;
 856    fb_state.height = dst->height;
 857    fb_state.nr_cbufs = 1;
 858    fb_state.cbufs[0] = dst;
 859    fb_state.zsbuf = 0;
 860    pipe->set_framebuffer_state(pipe, &fb_state);
 861
 862    blitter_set_clear_color(ctx, rgba);
 863    blitter_set_rectangle(ctx, 0, 0, width, height, dst->width, dst->height, 0);
 864    blitter_draw_quad(ctx);
 865    blitter_restore_CSOs(ctx);
 866 }