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_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    /* 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                                   PIPE_BIND_VERTEX_BUFFER,
 219                                   sizeof(ctx->vertices));
 220
 221    return &ctx->blitter;
 222 }
 223
 224 void util_blitter_destroy(struct blitter_context *blitter)
 225 {
 226    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 227    struct pipe_context *pipe = ctx->pipe;
 228    int i;
 229
 230    pipe->delete_blend_state(pipe, ctx->blend_write_color);
 231    pipe->delete_blend_state(pipe, ctx->blend_keep_color);
 232    pipe->delete_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 233    pipe->delete_depth_stencil_alpha_state(pipe,
 234                                           ctx->dsa_write_depth_keep_stencil);
 235    pipe->delete_depth_stencil_alpha_state(pipe, ctx->dsa_write_depth_stencil);
 236
 237    pipe->delete_rasterizer_state(pipe, ctx->rs_state);
 238    pipe->delete_vs_state(pipe, ctx->vs_col);
 239    pipe->delete_vs_state(pipe, ctx->vs_tex);
 240    pipe->delete_vertex_elements_state(pipe, ctx->velem_state);
 241
 242    for (i = 0; i < PIPE_MAX_TEXTURE_TYPES; i++) {
 243       if (ctx->fs_texfetch_col[i])
 244          pipe->delete_fs_state(pipe, ctx->fs_texfetch_col[i]);
 245       if (ctx->fs_texfetch_depth[i])
 246          pipe->delete_fs_state(pipe, ctx->fs_texfetch_depth[i]);
 247    }
 248
 249    for (i = 0; i < PIPE_MAX_COLOR_BUFS && ctx->fs_col[i]; i++)
 250       if (ctx->fs_col[i])
 251          pipe->delete_fs_state(pipe, ctx->fs_col[i]);
 252
 253    for (i = 0; i < PIPE_MAX_TEXTURE_LEVELS; i++)
 254       if (ctx->sampler_state[i])
 255          pipe->delete_sampler_state(pipe, ctx->sampler_state[i]);
 256
 257    if (ctx->sampler_view) {
 258       pipe_sampler_view_reference(&ctx->sampler_view, NULL);
 259    }
 260
 261    pipe_resource_reference(&ctx->vbuf, NULL);
 262    FREE(ctx);
 263 }
 264
 265 static void blitter_check_saved_CSOs(struct blitter_context_priv *ctx)
 266 {
 267    /* make sure these CSOs have been saved */
 268    assert(ctx->blitter.saved_blend_state != INVALID_PTR &&
 269           ctx->blitter.saved_dsa_state != INVALID_PTR &&
 270           ctx->blitter.saved_rs_state != INVALID_PTR &&
 271           ctx->blitter.saved_fs != INVALID_PTR &&
 272           ctx->blitter.saved_vs != INVALID_PTR &&
 273           ctx->blitter.saved_velem_state != INVALID_PTR);
 274 }
 275
 276 static void blitter_restore_CSOs(struct blitter_context_priv *ctx)
 277 {
 278    struct pipe_context *pipe = ctx->pipe;
 279
 280    /* restore the state objects which are always required to be saved */
 281    pipe->bind_blend_state(pipe, ctx->blitter.saved_blend_state);
 282    pipe->bind_depth_stencil_alpha_state(pipe, ctx->blitter.saved_dsa_state);
 283    pipe->bind_rasterizer_state(pipe, ctx->blitter.saved_rs_state);
 284    pipe->bind_fs_state(pipe, ctx->blitter.saved_fs);
 285    pipe->bind_vs_state(pipe, ctx->blitter.saved_vs);
 286    pipe->bind_vertex_elements_state(pipe, ctx->blitter.saved_velem_state);
 287
 288    ctx->blitter.saved_blend_state = INVALID_PTR;
 289    ctx->blitter.saved_dsa_state = INVALID_PTR;
 290    ctx->blitter.saved_rs_state = INVALID_PTR;
 291    ctx->blitter.saved_fs = INVALID_PTR;
 292    ctx->blitter.saved_vs = INVALID_PTR;
 293    ctx->blitter.saved_velem_state = INVALID_PTR;
 294
 295    pipe->set_stencil_ref(pipe, &ctx->blitter.saved_stencil_ref);
 296
 297    pipe->set_viewport_state(pipe, &ctx->blitter.saved_viewport);
 298    pipe->set_clip_state(pipe, &ctx->blitter.saved_clip);
 299
 300    /* restore the state objects which are required to be saved before copy/fill
 301     */
 302    if (ctx->blitter.saved_fb_state.nr_cbufs != ~0) {
 303       pipe->set_framebuffer_state(pipe, &ctx->blitter.saved_fb_state);
 304       ctx->blitter.saved_fb_state.nr_cbufs = ~0;
 305    }
 306
 307    if (ctx->blitter.saved_num_sampler_states != ~0) {
 308       pipe->bind_fragment_sampler_states(pipe,
 309                                          ctx->blitter.saved_num_sampler_states,
 310                                          ctx->blitter.saved_sampler_states);
 311       ctx->blitter.saved_num_sampler_states = ~0;
 312    }
 313
 314    if (ctx->blitter.saved_num_sampler_views != ~0) {
 315       pipe->set_fragment_sampler_views(pipe,
 316                                        ctx->blitter.saved_num_sampler_views,
 317                                        ctx->blitter.saved_sampler_views);
 318       ctx->blitter.saved_num_sampler_views = ~0;
 319    }
 320 }
 321
 322 static void blitter_set_rectangle(struct blitter_context_priv *ctx,
 323                                   unsigned x1, unsigned y1,
 324                                   unsigned x2, unsigned y2,
 325                                   unsigned width, unsigned height,
 326                                   float depth)
 327 {
 328    int i;
 329
 330    /* set vertex positions */
 331    ctx->vertices[0][0][0] = (float)x1 / width * 2.0f - 1.0f; /*v0.x*/
 332    ctx->vertices[0][0][1] = (float)y1 / height * 2.0f - 1.0f; /*v0.y*/
 333
 334    ctx->vertices[1][0][0] = (float)x2 / width * 2.0f - 1.0f; /*v1.x*/
 335    ctx->vertices[1][0][1] = (float)y1 / height * 2.0f - 1.0f; /*v1.y*/
 336
 337    ctx->vertices[2][0][0] = (float)x2 / width * 2.0f - 1.0f; /*v2.x*/
 338    ctx->vertices[2][0][1] = (float)y2 / height * 2.0f - 1.0f; /*v2.y*/
 339
 340    ctx->vertices[3][0][0] = (float)x1 / width * 2.0f - 1.0f; /*v3.x*/
 341    ctx->vertices[3][0][1] = (float)y2 / height * 2.0f - 1.0f; /*v3.y*/
 342
 343    for (i = 0; i < 4; i++)
 344       ctx->vertices[i][0][2] = depth; /*z*/
 345
 346    /* viewport */
 347    ctx->viewport.scale[0] = 0.5f * width;
 348    ctx->viewport.scale[1] = 0.5f * height;
 349    ctx->viewport.scale[2] = 1.0f;
 350    ctx->viewport.scale[3] = 1.0f;
 351    ctx->viewport.translate[0] = 0.5f * width;
 352    ctx->viewport.translate[1] = 0.5f * height;
 353    ctx->viewport.translate[2] = 0.0f;
 354    ctx->viewport.translate[3] = 0.0f;
 355    ctx->pipe->set_viewport_state(ctx->pipe, &ctx->viewport);
 356
 357    /* clip */
 358    ctx->pipe->set_clip_state(ctx->pipe, &ctx->clip);
 359 }
 360
 361 static void blitter_set_clear_color(struct blitter_context_priv *ctx,
 362                                     const float *rgba)
 363 {
 364    int i;
 365
 366    for (i = 0; i < 4; i++) {
 367       ctx->vertices[i][1][0] = rgba[0];
 368       ctx->vertices[i][1][1] = rgba[1];
 369       ctx->vertices[i][1][2] = rgba[2];
 370       ctx->vertices[i][1][3] = rgba[3];
 371    }
 372 }
 373
 374 static void blitter_set_texcoords_2d(struct blitter_context_priv *ctx,
 375                                      struct pipe_surface *surf,
 376                                      unsigned x1, unsigned y1,
 377                                      unsigned x2, unsigned y2)
 378 {
 379    int i;
 380    float s1 = x1 / (float)surf->width;
 381    float t1 = y1 / (float)surf->height;
 382    float s2 = x2 / (float)surf->width;
 383    float t2 = y2 / (float)surf->height;
 384
 385    ctx->vertices[0][1][0] = s1; /*t0.s*/
 386    ctx->vertices[0][1][1] = t1; /*t0.t*/
 387
 388    ctx->vertices[1][1][0] = s2; /*t1.s*/
 389    ctx->vertices[1][1][1] = t1; /*t1.t*/
 390
 391    ctx->vertices[2][1][0] = s2; /*t2.s*/
 392    ctx->vertices[2][1][1] = t2; /*t2.t*/
 393
 394    ctx->vertices[3][1][0] = s1; /*t3.s*/
 395    ctx->vertices[3][1][1] = t2; /*t3.t*/
 396
 397    for (i = 0; i < 4; i++) {
 398       ctx->vertices[i][1][2] = 0; /*r*/
 399       ctx->vertices[i][1][3] = 1; /*q*/
 400    }
 401 }
 402
 403 static void blitter_set_texcoords_3d(struct blitter_context_priv *ctx,
 404                                      struct pipe_surface *surf,
 405                                      unsigned x1, unsigned y1,
 406                                      unsigned x2, unsigned y2)
 407 {
 408    int i;
 409    float depth = u_minify(surf->texture->depth0, surf->level);
 410    float r = surf->zslice / depth;
 411
 412    blitter_set_texcoords_2d(ctx, surf, x1, y1, x2, y2);
 413
 414    for (i = 0; i < 4; i++)
 415       ctx->vertices[i][1][2] = r; /*r*/
 416 }
 417
 418 static void blitter_set_texcoords_cube(struct blitter_context_priv *ctx,
 419                                        struct pipe_surface *surf,
 420                                        unsigned x1, unsigned y1,
 421                                        unsigned x2, unsigned y2)
 422 {
 423    int i;
 424    float s1 = x1 / (float)surf->width;
 425    float t1 = y1 / (float)surf->height;
 426    float s2 = x2 / (float)surf->width;
 427    float t2 = y2 / (float)surf->height;
 428    float st[4][2];
 429
 430    st[0][0] = s1;
 431    st[0][1] = t1;
 432    st[1][0] = s2;
 433    st[1][1] = t1;
 434    st[2][0] = s2;
 435    st[2][1] = t2;
 436    st[3][0] = s1;
 437    st[3][1] = t2;
 438
 439    util_map_texcoords2d_onto_cubemap(surf->face,
 440                                      /* pointer, stride in floats */
 441                                      &st[0][0], 2,
 442                                      &ctx->vertices[0][1][0], 8);
 443
 444    for (i = 0; i < 4; i++)
 445       ctx->vertices[i][1][3] = 1; /*q*/
 446 }
 447
 448 static void blitter_draw_quad(struct blitter_context_priv *ctx)
 449 {
 450    struct pipe_context *pipe = ctx->pipe;
 451
 452    /* write vertices and draw them */
 453    pipe_buffer_write(pipe, ctx->vbuf,
 454                      0, sizeof(ctx->vertices), ctx->vertices);
 455
 456    util_draw_vertex_buffer(pipe, ctx->vbuf, 0, PIPE_PRIM_TRIANGLE_FAN,
 457                            4,  /* verts */
 458                            2); /* attribs/vert */
 459 }
 460
 461 static INLINE
 462 void **blitter_get_sampler_state(struct blitter_context_priv *ctx,
 463                                  int miplevel)
 464 {
 465    struct pipe_context *pipe = ctx->pipe;
 466    struct pipe_sampler_state *sampler_state = &ctx->template_sampler_state;
 467
 468    assert(miplevel < PIPE_MAX_TEXTURE_LEVELS);
 469
 470    /* Create the sampler state on-demand. */
 471    if (!ctx->sampler_state[miplevel]) {
 472       sampler_state->lod_bias = miplevel;
 473       sampler_state->min_lod = miplevel;
 474       sampler_state->max_lod = miplevel;
 475
 476       ctx->sampler_state[miplevel] = pipe->create_sampler_state(pipe,
 477                                                                 sampler_state);
 478    }
 479
 480    /* Return void** so that it can be passed to bind_fragment_sampler_states
 481     * directly. */
 482    return &ctx->sampler_state[miplevel];
 483 }
 484
 485 static INLINE
 486 void *blitter_get_fs_col(struct blitter_context_priv *ctx, unsigned num_cbufs)
 487 {
 488    struct pipe_context *pipe = ctx->pipe;
 489    unsigned index = num_cbufs ? num_cbufs - 1 : 0;
 490
 491    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 492
 493    if (!ctx->fs_col[index])
 494       ctx->fs_col[index] =
 495          util_make_fragment_clonecolor_shader(pipe, num_cbufs);
 496
 497    return ctx->fs_col[index];
 498 }
 499
 500 static INLINE
 501 void *blitter_get_fs_texfetch_col(struct blitter_context_priv *ctx,
 502                                   unsigned tex_target)
 503 {
 504    struct pipe_context *pipe = ctx->pipe;
 505
 506    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 507
 508    /* Create the fragment shader on-demand. */
 509    if (!ctx->fs_texfetch_col[tex_target]) {
 510       switch (tex_target) {
 511          case PIPE_TEXTURE_1D:
 512             ctx->fs_texfetch_col[PIPE_TEXTURE_1D] =
 513                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_1D);
 514             break;
 515          case PIPE_TEXTURE_2D:
 516             ctx->fs_texfetch_col[PIPE_TEXTURE_2D] =
 517                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D);
 518             break;
 519          case PIPE_TEXTURE_3D:
 520             ctx->fs_texfetch_col[PIPE_TEXTURE_3D] =
 521                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_3D);
 522             break;
 523          case PIPE_TEXTURE_CUBE:
 524             ctx->fs_texfetch_col[PIPE_TEXTURE_CUBE] =
 525                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_CUBE);
 526             break;
 527          default:;
 528       }
 529    }
 530
 531    return ctx->fs_texfetch_col[tex_target];
 532 }
 533
 534 static INLINE
 535 void *blitter_get_fs_texfetch_depth(struct blitter_context_priv *ctx,
 536                                     unsigned tex_target)
 537 {
 538    struct pipe_context *pipe = ctx->pipe;
 539
 540    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 541
 542    /* Create the fragment shader on-demand. */
 543    if (!ctx->fs_texfetch_depth[tex_target]) {
 544       switch (tex_target) {
 545          case PIPE_TEXTURE_1D:
 546             ctx->fs_texfetch_depth[PIPE_TEXTURE_1D] =
 547                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_1D);
 548             break;
 549          case PIPE_TEXTURE_2D:
 550             ctx->fs_texfetch_depth[PIPE_TEXTURE_2D] =
 551                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_2D);
 552             break;
 553          case PIPE_TEXTURE_3D:
 554             ctx->fs_texfetch_depth[PIPE_TEXTURE_3D] =
 555                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_3D);
 556             break;
 557          case PIPE_TEXTURE_CUBE:
 558             ctx->fs_texfetch_depth[PIPE_TEXTURE_CUBE] =
 559                util_make_fragment_tex_shader_writedepth(pipe,TGSI_TEXTURE_CUBE);
 560             break;
 561          default:;
 562       }
 563    }
 564
 565    return ctx->fs_texfetch_depth[tex_target];
 566 }
 567
 568 void util_blitter_clear(struct blitter_context *blitter,
 569                         unsigned width, unsigned height,
 570                         unsigned num_cbufs,
 571                         unsigned clear_buffers,
 572                         const float *rgba,
 573                         double depth, unsigned stencil)
 574 {
 575    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 576    struct pipe_context *pipe = ctx->pipe;
 577    struct pipe_stencil_ref sr = { { 0 } };
 578
 579    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 580
 581    blitter_check_saved_CSOs(ctx);
 582
 583    /* bind CSOs */
 584    if (clear_buffers & PIPE_CLEAR_COLOR)
 585       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 586    else
 587       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 588
 589    if (clear_buffers & PIPE_CLEAR_DEPTHSTENCIL) {
 590       sr.ref_value[0] = stencil & 0xff;
 591       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_write_depth_stencil);
 592       pipe->set_stencil_ref(pipe, &sr);
 593    }
 594    else
 595       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 596
 597    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 598    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 599    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, num_cbufs));
 600    pipe->bind_vs_state(pipe, ctx->vs_col);
 601
 602    blitter_set_clear_color(ctx, rgba);
 603    blitter_set_rectangle(ctx, 0, 0, width, height, width, height, depth);
 604    blitter_draw_quad(ctx);
 605    blitter_restore_CSOs(ctx);
 606 }
 607
 608 static boolean
 609 is_overlap(unsigned sx1, unsigned sx2, unsigned sy1, unsigned sy2,
 610            unsigned dx1, unsigned dx2, unsigned dy1, unsigned dy2)
 611 {
 612     if (sx1 >= dx2 || sx2 <= dx1 || sy1 >= dy2 || sy2 <= dy1) {
 613         return FALSE;
 614     } else {
 615         return TRUE;
 616     }
 617 }
 618
 619 static void util_blitter_do_copy(struct blitter_context *blitter,
 620                                  struct pipe_surface *dst,
 621                                  unsigned dstx, unsigned dsty,
 622                                  struct pipe_surface *src,
 623                                  unsigned srcx, unsigned srcy,
 624                                  unsigned width, unsigned height,
 625                                  boolean is_depth)
 626 {
 627    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 628    struct pipe_context *pipe = ctx->pipe;
 629    struct pipe_framebuffer_state fb_state;
 630    struct pipe_sampler_view viewTempl, *view;
 631
 632    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 633    assert(blitter->saved_num_sampler_views != ~0);
 634    assert(blitter->saved_num_sampler_states != ~0);
 635    assert(src->texture->target < PIPE_MAX_TEXTURE_TYPES);
 636
 637    /* bind CSOs */
 638    fb_state.width = dst->width;
 639    fb_state.height = dst->height;
 640
 641    if (is_depth) {
 642       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 643       pipe->bind_depth_stencil_alpha_state(pipe,
 644                                            ctx->dsa_write_depth_keep_stencil);
 645       pipe->bind_fs_state(pipe,
 646          blitter_get_fs_texfetch_depth(ctx, src->texture->target));
 647
 648       fb_state.nr_cbufs = 0;
 649       fb_state.zsbuf = dst;
 650    } else {
 651       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 652       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 653       pipe->bind_fs_state(pipe,
 654          blitter_get_fs_texfetch_col(ctx, src->texture->target));
 655
 656       fb_state.nr_cbufs = 1;
 657       fb_state.cbufs[0] = dst;
 658       fb_state.zsbuf = 0;
 659    }
 660
 661    u_sampler_view_default_template(&viewTempl,
 662                                    src->texture,
 663                                    src->texture->format);
 664    view = pipe->create_sampler_view(pipe,
 665                                     src->texture,
 666                                     &viewTempl);
 667
 668    if (ctx->sampler_view) {
 669       pipe_sampler_view_reference(&ctx->sampler_view, NULL);
 670    }
 671    ctx->sampler_view = view;
 672
 673    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 674    pipe->bind_vs_state(pipe, ctx->vs_tex);
 675    pipe->bind_fragment_sampler_states(pipe, 1,
 676       blitter_get_sampler_state(ctx, src->level));
 677    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 678    pipe->set_fragment_sampler_views(pipe, 1, &view);
 679    pipe->set_framebuffer_state(pipe, &fb_state);
 680
 681    /* set texture coordinates */
 682    switch (src->texture->target) {
 683       case PIPE_TEXTURE_1D:
 684       case PIPE_TEXTURE_2D:
 685          blitter_set_texcoords_2d(ctx, src, srcx, srcy,
 686                                   srcx+width, srcy+height);
 687          break;
 688       case PIPE_TEXTURE_3D:
 689          blitter_set_texcoords_3d(ctx, src, srcx, srcy,
 690                                   srcx+width, srcy+height);
 691          break;
 692       case PIPE_TEXTURE_CUBE:
 693          blitter_set_texcoords_cube(ctx, src, srcx, srcy,
 694                                     srcx+width, srcy+height);
 695          break;
 696       default:
 697          assert(0);
 698    }
 699
 700    blitter_set_rectangle(ctx, dstx, dsty, dstx+width, dsty+height, dst->width, dst->height, 0);
 701    blitter_draw_quad(ctx);
 702
 703 }
 704
 705 static void util_blitter_overlap_copy(struct blitter_context *blitter,
 706                                       struct pipe_surface *dst,
 707                                       unsigned dstx, unsigned dsty,
 708                                       struct pipe_surface *src,
 709                                       unsigned srcx, unsigned srcy,
 710                                       unsigned width, unsigned height)
 711 {
 712    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 713    struct pipe_context *pipe = ctx->pipe;
 714    struct pipe_screen *screen = pipe->screen;
 715
 716    struct pipe_resource texTemp;
 717    struct pipe_resource *texture;
 718    struct pipe_surface *tex_surf;
 719
 720    /* check whether the states are properly saved */
 721    blitter_check_saved_CSOs(ctx);
 722
 723    memset(&texTemp, 0, sizeof(texTemp));
 724    texTemp.target = PIPE_TEXTURE_2D;
 725    texTemp.format = dst->texture->format; /* XXX verify supported by driver! */
 726    texTemp.last_level = 0;
 727    texTemp.width0 = width;
 728    texTemp.height0 = height;
 729    texTemp.depth0 = 1;
 730
 731    texture = screen->resource_create(screen, &texTemp);
 732    if (!texture)
 733       return;
 734
 735    tex_surf = screen->get_tex_surface(screen, texture, 0, 0, 0,
 736                                       PIPE_BIND_BLIT_SOURCE |
 737                                       PIPE_BIND_BLIT_DESTINATION);
 738
 739    /* blit from the src to the temp */
 740    util_blitter_do_copy(blitter, tex_surf, 0, 0,
 741                         src, srcx, srcy,
 742                         width, height,
 743                         FALSE);
 744    util_blitter_do_copy(blitter, dst, dstx, dsty,
 745                         tex_surf, 0, 0,
 746                         width, height,
 747                         FALSE);
 748    pipe_surface_reference(&tex_surf, NULL);
 749    pipe_resource_reference(&texture, NULL);
 750    blitter_restore_CSOs(ctx);
 751 }
 752
 753 void util_blitter_copy(struct blitter_context *blitter,
 754                        struct pipe_surface *dst,
 755                        unsigned dstx, unsigned dsty,
 756                        struct pipe_surface *src,
 757                        unsigned srcx, unsigned srcy,
 758                        unsigned width, unsigned height,
 759                        boolean ignore_stencil)
 760 {
 761    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 762    struct pipe_context *pipe = ctx->pipe;
 763    struct pipe_screen *screen = pipe->screen;
 764    boolean is_stencil, is_depth;
 765    unsigned dst_tex_usage;
 766
 767    /* give up if textures are not set */
 768    assert(dst->texture && src->texture);
 769    if (!dst->texture || !src->texture)
 770       return;
 771
 772    if (dst->texture == src->texture) {
 773       if (is_overlap(srcx, srcx + width, srcy, srcy + height,
 774                              dstx, dstx + width, dsty, dsty + height)) {
 775          util_blitter_overlap_copy(blitter, dst, dstx, dsty, src, srcx, srcy,
 776                                    width, height);
 777          return;
 778       }
 779    }
 780
 781    is_depth = util_format_get_component_bits(src->format, UTIL_FORMAT_COLORSPACE_ZS, 0) != 0;
 782    is_stencil = util_format_get_component_bits(src->format, UTIL_FORMAT_COLORSPACE_ZS, 1) != 0;
 783    dst_tex_usage = is_depth || is_stencil ? PIPE_BIND_DEPTH_STENCIL :
 784                                             PIPE_BIND_RENDER_TARGET;
 785
 786    /* check if we can sample from and render to the surfaces */
 787    /* (assuming copying a stencil buffer is not possible) */
 788    if ((!ignore_stencil && is_stencil) ||
 789        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 790                                     dst_tex_usage, 0) ||
 791        !screen->is_format_supported(screen, src->format, src->texture->target,
 792                                     PIPE_BIND_SAMPLER_VIEW, 0)) {
 793       util_surface_copy(pipe, FALSE, dst, dstx, dsty, src, srcx, srcy,
 794                         width, height);
 795       return;
 796    }
 797
 798    /* check whether the states are properly saved */
 799    blitter_check_saved_CSOs(ctx);
 800    util_blitter_do_copy(blitter,
 801                         dst, dstx, dsty,
 802                         src, srcx, srcy,
 803                         width, height, is_depth);
 804    blitter_restore_CSOs(ctx);
 805 }
 806
 807 void util_blitter_fill(struct blitter_context *blitter,
 808                        struct pipe_surface *dst,
 809                        unsigned dstx, unsigned dsty,
 810                        unsigned width, unsigned height,
 811                        unsigned value)
 812 {
 813    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 814    struct pipe_context *pipe = ctx->pipe;
 815    struct pipe_screen *screen = pipe->screen;
 816    struct pipe_framebuffer_state fb_state;
 817    float rgba[4];
 818    ubyte ub_rgba[4] = {0};
 819    union util_color color;
 820    int i;
 821
 822    assert(dst->texture);
 823    if (!dst->texture)
 824       return;
 825
 826    /* check if we can render to the surface */
 827    if (util_format_is_depth_or_stencil(dst->format) || /* unlikely, but you never know */
 828        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 829                                     PIPE_BIND_RENDER_TARGET, 0)) {
 830       util_surface_fill(pipe, dst, dstx, dsty, width, height, value);
 831       return;
 832    }
 833
 834    /* unpack the color */
 835    color.ui = value;
 836    util_unpack_color_ub(dst->format, &color,
 837                         ub_rgba, ub_rgba+1, ub_rgba+2, ub_rgba+3);
 838    for (i = 0; i < 4; i++)
 839       rgba[i] = ubyte_to_float(ub_rgba[i]);
 840
 841    /* check the saved state */
 842    blitter_check_saved_CSOs(ctx);
 843    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 844
 845    /* bind CSOs */
 846    pipe->bind_blend_state(pipe, ctx->blend_write_color);
 847    pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 848    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 849    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 1));
 850    pipe->bind_vs_state(pipe, ctx->vs_col);
 851    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 852
 853    /* set a framebuffer state */
 854    fb_state.width = dst->width;
 855    fb_state.height = dst->height;
 856    fb_state.nr_cbufs = 1;
 857    fb_state.cbufs[0] = dst;
 858    fb_state.zsbuf = 0;
 859    pipe->set_framebuffer_state(pipe, &fb_state);
 860
 861    blitter_set_clear_color(ctx, rgba);
 862    blitter_set_rectangle(ctx, 0, 0, width, height, dst->width, dst->height, 0);
 863    blitter_draw_quad(ctx);
 864    blitter_restore_CSOs(ctx);
 865 }