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    if (rgba) {
 375        for (i = 0; i < 4; i++) {
 376           ctx->vertices[i][1][0] = rgba[0];
 377           ctx->vertices[i][1][1] = rgba[1];
 378           ctx->vertices[i][1][2] = rgba[2];
 379           ctx->vertices[i][1][3] = rgba[3];
 380        }
 381    } else {
 382        for (i = 0; i < 4; i++) {
 383           ctx->vertices[i][1][0] = 0;
 384           ctx->vertices[i][1][1] = 0;
 385           ctx->vertices[i][1][2] = 0;
 386           ctx->vertices[i][1][3] = 0;
 387        }
 388    }
 389 }
 390
 391 static void blitter_set_texcoords_2d(struct blitter_context_priv *ctx,
 392                                      struct pipe_surface *surf,
 393                                      unsigned x1, unsigned y1,
 394                                      unsigned x2, unsigned y2)
 395 {
 396    int i;
 397    float s1 = x1 / (float)surf->width;
 398    float t1 = y1 / (float)surf->height;
 399    float s2 = x2 / (float)surf->width;
 400    float t2 = y2 / (float)surf->height;
 401
 402    ctx->vertices[0][1][0] = s1; /*t0.s*/
 403    ctx->vertices[0][1][1] = t1; /*t0.t*/
 404
 405    ctx->vertices[1][1][0] = s2; /*t1.s*/
 406    ctx->vertices[1][1][1] = t1; /*t1.t*/
 407
 408    ctx->vertices[2][1][0] = s2; /*t2.s*/
 409    ctx->vertices[2][1][1] = t2; /*t2.t*/
 410
 411    ctx->vertices[3][1][0] = s1; /*t3.s*/
 412    ctx->vertices[3][1][1] = t2; /*t3.t*/
 413
 414    for (i = 0; i < 4; i++) {
 415       ctx->vertices[i][1][2] = 0; /*r*/
 416       ctx->vertices[i][1][3] = 1; /*q*/
 417    }
 418 }
 419
 420 static void blitter_set_texcoords_3d(struct blitter_context_priv *ctx,
 421                                      struct pipe_surface *surf,
 422                                      unsigned x1, unsigned y1,
 423                                      unsigned x2, unsigned y2)
 424 {
 425    int i;
 426    float depth = u_minify(surf->texture->depth0, surf->level);
 427    float r = surf->zslice / depth;
 428
 429    blitter_set_texcoords_2d(ctx, surf, x1, y1, x2, y2);
 430
 431    for (i = 0; i < 4; i++)
 432       ctx->vertices[i][1][2] = r; /*r*/
 433 }
 434
 435 static void blitter_set_texcoords_cube(struct blitter_context_priv *ctx,
 436                                        struct pipe_surface *surf,
 437                                        unsigned x1, unsigned y1,
 438                                        unsigned x2, unsigned y2)
 439 {
 440    int i;
 441    float s1 = x1 / (float)surf->width;
 442    float t1 = y1 / (float)surf->height;
 443    float s2 = x2 / (float)surf->width;
 444    float t2 = y2 / (float)surf->height;
 445    float st[4][2];
 446
 447    st[0][0] = s1;
 448    st[0][1] = t1;
 449    st[1][0] = s2;
 450    st[1][1] = t1;
 451    st[2][0] = s2;
 452    st[2][1] = t2;
 453    st[3][0] = s1;
 454    st[3][1] = t2;
 455
 456    util_map_texcoords2d_onto_cubemap(surf->face,
 457                                      /* pointer, stride in floats */
 458                                      &st[0][0], 2,
 459                                      &ctx->vertices[0][1][0], 8);
 460
 461    for (i = 0; i < 4; i++)
 462       ctx->vertices[i][1][3] = 1; /*q*/
 463 }
 464
 465 static void blitter_draw_quad(struct blitter_context_priv *ctx)
 466 {
 467    struct pipe_context *pipe = ctx->pipe;
 468
 469    /* write vertices and draw them */
 470    pipe_buffer_write(pipe, ctx->vbuf,
 471                      0, sizeof(ctx->vertices), ctx->vertices);
 472
 473    util_draw_vertex_buffer(pipe, ctx->vbuf, 0, PIPE_PRIM_TRIANGLE_FAN,
 474                            4,  /* verts */
 475                            2); /* attribs/vert */
 476 }
 477
 478 static INLINE
 479 void **blitter_get_sampler_state(struct blitter_context_priv *ctx,
 480                                  int miplevel)
 481 {
 482    struct pipe_context *pipe = ctx->pipe;
 483    struct pipe_sampler_state *sampler_state = &ctx->template_sampler_state;
 484
 485    assert(miplevel < PIPE_MAX_TEXTURE_LEVELS);
 486
 487    /* Create the sampler state on-demand. */
 488    if (!ctx->sampler_state[miplevel]) {
 489       sampler_state->lod_bias = miplevel;
 490       sampler_state->min_lod = miplevel;
 491       sampler_state->max_lod = miplevel;
 492
 493       ctx->sampler_state[miplevel] = pipe->create_sampler_state(pipe,
 494                                                                 sampler_state);
 495    }
 496
 497    /* Return void** so that it can be passed to bind_fragment_sampler_states
 498     * directly. */
 499    return &ctx->sampler_state[miplevel];
 500 }
 501
 502 static INLINE
 503 void *blitter_get_fs_col(struct blitter_context_priv *ctx, unsigned num_cbufs)
 504 {
 505    struct pipe_context *pipe = ctx->pipe;
 506
 507    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 508
 509    if (!ctx->fs_col[num_cbufs])
 510       ctx->fs_col[num_cbufs] =
 511          util_make_fragment_clonecolor_shader(pipe, num_cbufs);
 512
 513    return ctx->fs_col[num_cbufs];
 514 }
 515
 516 static INLINE
 517 void *blitter_get_fs_texfetch_col(struct blitter_context_priv *ctx,
 518                                   unsigned tex_target)
 519 {
 520    struct pipe_context *pipe = ctx->pipe;
 521
 522    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 523
 524    /* Create the fragment shader on-demand. */
 525    if (!ctx->fs_texfetch_col[tex_target]) {
 526       switch (tex_target) {
 527          case PIPE_TEXTURE_1D:
 528             ctx->fs_texfetch_col[PIPE_TEXTURE_1D] =
 529                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_1D);
 530             break;
 531          case PIPE_TEXTURE_2D:
 532             ctx->fs_texfetch_col[PIPE_TEXTURE_2D] =
 533                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D);
 534             break;
 535          case PIPE_TEXTURE_3D:
 536             ctx->fs_texfetch_col[PIPE_TEXTURE_3D] =
 537                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_3D);
 538             break;
 539          case PIPE_TEXTURE_CUBE:
 540             ctx->fs_texfetch_col[PIPE_TEXTURE_CUBE] =
 541                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_CUBE);
 542             break;
 543          default:;
 544       }
 545    }
 546
 547    return ctx->fs_texfetch_col[tex_target];
 548 }
 549
 550 static INLINE
 551 void *blitter_get_fs_texfetch_depth(struct blitter_context_priv *ctx,
 552                                     unsigned tex_target)
 553 {
 554    struct pipe_context *pipe = ctx->pipe;
 555
 556    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 557
 558    /* Create the fragment shader on-demand. */
 559    if (!ctx->fs_texfetch_depth[tex_target]) {
 560       switch (tex_target) {
 561          case PIPE_TEXTURE_1D:
 562             ctx->fs_texfetch_depth[PIPE_TEXTURE_1D] =
 563                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_1D);
 564             break;
 565          case PIPE_TEXTURE_2D:
 566             ctx->fs_texfetch_depth[PIPE_TEXTURE_2D] =
 567                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_2D);
 568             break;
 569          case PIPE_TEXTURE_3D:
 570             ctx->fs_texfetch_depth[PIPE_TEXTURE_3D] =
 571                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_3D);
 572             break;
 573          case PIPE_TEXTURE_CUBE:
 574             ctx->fs_texfetch_depth[PIPE_TEXTURE_CUBE] =
 575                util_make_fragment_tex_shader_writedepth(pipe,TGSI_TEXTURE_CUBE);
 576             break;
 577          default:;
 578       }
 579    }
 580
 581    return ctx->fs_texfetch_depth[tex_target];
 582 }
 583
 584 void util_blitter_clear(struct blitter_context *blitter,
 585                         unsigned width, unsigned height,
 586                         unsigned num_cbufs,
 587                         unsigned clear_buffers,
 588                         const float *rgba,
 589                         double depth, unsigned stencil)
 590 {
 591    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 592    struct pipe_context *pipe = ctx->pipe;
 593    struct pipe_stencil_ref sr = { { 0 } };
 594
 595    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 596
 597    blitter_check_saved_CSOs(ctx);
 598
 599    /* bind CSOs */
 600    if (clear_buffers & PIPE_CLEAR_COLOR)
 601       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 602    else
 603       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 604
 605    if (clear_buffers & PIPE_CLEAR_DEPTHSTENCIL) {
 606       sr.ref_value[0] = stencil & 0xff;
 607       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_write_depth_stencil);
 608       pipe->set_stencil_ref(pipe, &sr);
 609    }
 610    else
 611       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 612
 613    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 614    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 615    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, num_cbufs));
 616    pipe->bind_vs_state(pipe, ctx->vs_col);
 617
 618    blitter_set_clear_color(ctx, rgba);
 619    blitter_set_rectangle(ctx, 0, 0, width, height, width, height, depth);
 620    blitter_draw_quad(ctx);
 621    blitter_restore_CSOs(ctx);
 622 }
 623
 624 static boolean
 625 is_overlap(unsigned sx1, unsigned sx2, unsigned sy1, unsigned sy2,
 626            unsigned dx1, unsigned dx2, unsigned dy1, unsigned dy2)
 627 {
 628     if (sx1 >= dx2 || sx2 <= dx1 || sy1 >= dy2 || sy2 <= dy1) {
 629         return FALSE;
 630     } else {
 631         return TRUE;
 632     }
 633 }
 634
 635 static void util_blitter_do_copy(struct blitter_context *blitter,
 636                                  struct pipe_surface *dst,
 637                                  unsigned dstx, unsigned dsty,
 638                                  struct pipe_surface *src,
 639                                  unsigned srcx, unsigned srcy,
 640                                  unsigned width, unsigned height,
 641                                  boolean is_depth)
 642 {
 643    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 644    struct pipe_context *pipe = ctx->pipe;
 645    struct pipe_framebuffer_state fb_state;
 646    struct pipe_sampler_view viewTempl, *view;
 647
 648    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 649    assert(blitter->saved_num_sampler_views != ~0);
 650    assert(blitter->saved_num_sampler_states != ~0);
 651    assert(src->texture->target < PIPE_MAX_TEXTURE_TYPES);
 652
 653    /* bind CSOs */
 654    fb_state.width = dst->width;
 655    fb_state.height = dst->height;
 656
 657    if (is_depth) {
 658       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 659       pipe->bind_depth_stencil_alpha_state(pipe,
 660                                            ctx->dsa_write_depth_keep_stencil);
 661       pipe->bind_fs_state(pipe,
 662          blitter_get_fs_texfetch_depth(ctx, src->texture->target));
 663
 664       fb_state.nr_cbufs = 0;
 665       fb_state.zsbuf = dst;
 666    } else {
 667       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 668       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 669       pipe->bind_fs_state(pipe,
 670          blitter_get_fs_texfetch_col(ctx, src->texture->target));
 671
 672       fb_state.nr_cbufs = 1;
 673       fb_state.cbufs[0] = dst;
 674       fb_state.zsbuf = 0;
 675    }
 676
 677    u_sampler_view_default_template(&viewTempl,
 678                                    src->texture,
 679                                    src->texture->format);
 680    view = pipe->create_sampler_view(pipe,
 681                                     src->texture,
 682                                     &viewTempl);
 683
 684    if (ctx->sampler_view) {
 685       pipe_sampler_view_reference(&ctx->sampler_view, NULL);
 686    }
 687    ctx->sampler_view = view;
 688
 689    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 690    pipe->bind_vs_state(pipe, ctx->vs_tex);
 691    pipe->bind_fragment_sampler_states(pipe, 1,
 692       blitter_get_sampler_state(ctx, src->level));
 693    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 694    pipe->set_fragment_sampler_views(pipe, 1, &view);
 695    pipe->set_framebuffer_state(pipe, &fb_state);
 696
 697    /* set texture coordinates */
 698    switch (src->texture->target) {
 699       case PIPE_TEXTURE_1D:
 700       case PIPE_TEXTURE_2D:
 701          blitter_set_texcoords_2d(ctx, src, srcx, srcy,
 702                                   srcx+width, srcy+height);
 703          break;
 704       case PIPE_TEXTURE_3D:
 705          blitter_set_texcoords_3d(ctx, src, srcx, srcy,
 706                                   srcx+width, srcy+height);
 707          break;
 708       case PIPE_TEXTURE_CUBE:
 709          blitter_set_texcoords_cube(ctx, src, srcx, srcy,
 710                                     srcx+width, srcy+height);
 711          break;
 712       default:
 713          assert(0);
 714    }
 715
 716    blitter_set_rectangle(ctx, dstx, dsty, dstx+width, dsty+height, dst->width, dst->height, 0);
 717    blitter_draw_quad(ctx);
 718
 719 }
 720
 721
 722 void util_blitter_copy(struct blitter_context *blitter,
 723                        struct pipe_surface *dst,
 724                        unsigned dstx, unsigned dsty,
 725                        struct pipe_surface *src,
 726                        unsigned srcx, unsigned srcy,
 727                        unsigned width, unsigned height,
 728                        boolean ignore_stencil)
 729 {
 730    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 731    struct pipe_context *pipe = ctx->pipe;
 732    struct pipe_screen *screen = pipe->screen;
 733    boolean is_stencil, is_depth;
 734    unsigned dst_tex_usage;
 735
 736    /* give up if textures are not set */
 737    assert(dst->texture && src->texture);
 738    if (!dst->texture || !src->texture)
 739       return;
 740
 741    if (dst->texture == src->texture) {
 742       assert(!is_overlap(srcx, srcx + width, srcy, srcy + height,
 743              dstx, dstx + width, dsty, dsty + height));
 744    }
 745
 746    is_depth = util_format_get_component_bits(src->format, UTIL_FORMAT_COLORSPACE_ZS, 0) != 0;
 747    is_stencil = util_format_get_component_bits(src->format, UTIL_FORMAT_COLORSPACE_ZS, 1) != 0;
 748    dst_tex_usage = is_depth || is_stencil ? PIPE_BIND_DEPTH_STENCIL :
 749                                             PIPE_BIND_RENDER_TARGET;
 750
 751    /* check if we can sample from and render to the surfaces */
 752    /* (assuming copying a stencil buffer is not possible) */
 753    if ((!ignore_stencil && is_stencil) ||
 754        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 755                                     dst->texture->nr_samples, dst_tex_usage, 0) ||
 756        !screen->is_format_supported(screen, src->format, src->texture->target,
 757                                     src->texture->nr_samples, PIPE_BIND_SAMPLER_VIEW, 0)) {
 758       struct pipe_subresource subdst, subsrc;
 759       subdst.face = dst->face;
 760       subdst.level = dst->level;
 761       subsrc.face = src->face;
 762       subsrc.level = src->level;
 763       util_resource_copy_region(pipe, dst->texture, subdst, dstx, dsty, dst->zslice,
 764                                 src->texture, subsrc, srcx, srcy, src->zslice,
 765                                 width, height);
 766       return;
 767    }
 768
 769    /* check whether the states are properly saved */
 770    blitter_check_saved_CSOs(ctx);
 771    util_blitter_do_copy(blitter,
 772                         dst, dstx, dsty,
 773                         src, srcx, srcy,
 774                         width, height, is_depth);
 775    blitter_restore_CSOs(ctx);
 776 }
 777
 778 void util_blitter_fill(struct blitter_context *blitter,
 779                        struct pipe_surface *dst,
 780                        unsigned dstx, unsigned dsty,
 781                        unsigned width, unsigned height,
 782                        unsigned value)
 783 {
 784    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 785    struct pipe_context *pipe = ctx->pipe;
 786    struct pipe_screen *screen = pipe->screen;
 787    struct pipe_framebuffer_state fb_state;
 788    float rgba[4];
 789    ubyte ub_rgba[4] = {0};
 790    union util_color color;
 791    int i;
 792
 793    assert(dst->texture);
 794    if (!dst->texture)
 795       return;
 796
 797    /* check if we can render to the surface */
 798    if (util_format_is_depth_or_stencil(dst->format) || /* unlikely, but you never know */
 799        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 800                                     dst->texture->nr_samples,
 801                                     PIPE_BIND_RENDER_TARGET, 0)) {
 802       struct pipe_subresource subdst;
 803       subdst.face = dst->face;
 804       subdst.level = dst->level;
 805       util_resource_fill_region(pipe, dst->texture, subdst, dstx, dsty,
 806                                 dst->zslice, width, height, value);
 807       return;
 808    }
 809
 810    /* unpack the color */
 811    color.ui = value;
 812    util_unpack_color_ub(dst->format, &color,
 813                         ub_rgba, ub_rgba+1, ub_rgba+2, ub_rgba+3);
 814    for (i = 0; i < 4; i++)
 815       rgba[i] = ubyte_to_float(ub_rgba[i]);
 816
 817    /* check the saved state */
 818    blitter_check_saved_CSOs(ctx);
 819    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 820
 821    /* bind CSOs */
 822    pipe->bind_blend_state(pipe, ctx->blend_write_color);
 823    pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 824    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 825    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 1));
 826    pipe->bind_vs_state(pipe, ctx->vs_col);
 827    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 828
 829    /* set a framebuffer state */
 830    fb_state.width = dst->width;
 831    fb_state.height = dst->height;
 832    fb_state.nr_cbufs = 1;
 833    fb_state.cbufs[0] = dst;
 834    fb_state.zsbuf = 0;
 835    pipe->set_framebuffer_state(pipe, &fb_state);
 836
 837    blitter_set_clear_color(ctx, rgba);
 838    blitter_set_rectangle(ctx, 0, 0, width, height, dst->width, dst->height, 0);
 839    blitter_draw_quad(ctx);
 840    blitter_restore_CSOs(ctx);
 841 }