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    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.front_winding = PIPE_WINDING_CW;
 179    rs_state.cull_mode = PIPE_WINDING_NONE;
 180    rs_state.gl_rasterization_rules = 1;
 181    rs_state.flatshade = 1;
 182    ctx->rs_state = pipe->create_rasterizer_state(pipe, &rs_state);
 183
 184    /* vertex elements state */
 185    memset(&velem[0], 0, sizeof(velem[0]) * 2);
 186    for (i = 0; i < 2; i++) {
 187       velem[i].src_offset = i * 4 * sizeof(float);
 188       velem[i].instance_divisor = 0;
 189       velem[i].vertex_buffer_index = 0;
 190       velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 191    }
 192    ctx->velem_state = pipe->create_vertex_elements_state(pipe, 2, &velem[0]);
 193
 194    /* fragment shaders are created on-demand */
 195
 196    /* vertex shaders */
 197    {
 198       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 199                                       TGSI_SEMANTIC_COLOR };
 200       const uint semantic_indices[] = { 0, 0 };
 201       ctx->vs_col =
 202          util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 203                                              semantic_indices);
 204    }
 205    {
 206       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 207                                       TGSI_SEMANTIC_GENERIC };
 208       const uint semantic_indices[] = { 0, 0 };
 209       ctx->vs_tex =
 210          util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 211                                              semantic_indices);
 212    }
 213
 214    /* set invariant vertex coordinates */
 215    for (i = 0; i < 4; i++)
 216       ctx->vertices[i][0][3] = 1; /*v.w*/
 217
 218    /* create the vertex buffer */
 219    ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
 220                                   PIPE_BIND_VERTEX_BUFFER,
 221                                   sizeof(ctx->vertices));
 222
 223    return &ctx->blitter;
 224 }
 225
 226 void util_blitter_destroy(struct blitter_context *blitter)
 227 {
 228    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 229    struct pipe_context *pipe = ctx->pipe;
 230    int i;
 231
 232    pipe->delete_blend_state(pipe, ctx->blend_write_color);
 233    pipe->delete_blend_state(pipe, ctx->blend_keep_color);
 234    pipe->delete_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 235    pipe->delete_depth_stencil_alpha_state(pipe,
 236                                           ctx->dsa_write_depth_keep_stencil);
 237    pipe->delete_depth_stencil_alpha_state(pipe, ctx->dsa_write_depth_stencil);
 238
 239    pipe->delete_rasterizer_state(pipe, ctx->rs_state);
 240    pipe->delete_vs_state(pipe, ctx->vs_col);
 241    pipe->delete_vs_state(pipe, ctx->vs_tex);
 242    pipe->delete_vertex_elements_state(pipe, ctx->velem_state);
 243
 244    for (i = 0; i < PIPE_MAX_TEXTURE_TYPES; i++) {
 245       if (ctx->fs_texfetch_col[i])
 246          pipe->delete_fs_state(pipe, ctx->fs_texfetch_col[i]);
 247       if (ctx->fs_texfetch_depth[i])
 248          pipe->delete_fs_state(pipe, ctx->fs_texfetch_depth[i]);
 249    }
 250
 251    for (i = 0; i < PIPE_MAX_COLOR_BUFS && ctx->fs_col[i]; i++)
 252       if (ctx->fs_col[i])
 253          pipe->delete_fs_state(pipe, ctx->fs_col[i]);
 254
 255    for (i = 0; i < PIPE_MAX_TEXTURE_LEVELS; i++)
 256       if (ctx->sampler_state[i])
 257          pipe->delete_sampler_state(pipe, ctx->sampler_state[i]);
 258
 259    if (ctx->sampler_view) {
 260       pipe_sampler_view_reference(&ctx->sampler_view, NULL);
 261    }
 262
 263    pipe_resource_reference(&ctx->vbuf, NULL);
 264    FREE(ctx);
 265 }
 266
 267 static void blitter_check_saved_CSOs(struct blitter_context_priv *ctx)
 268 {
 269    /* make sure these CSOs have been saved */
 270    assert(ctx->blitter.saved_blend_state != INVALID_PTR &&
 271           ctx->blitter.saved_dsa_state != INVALID_PTR &&
 272           ctx->blitter.saved_rs_state != INVALID_PTR &&
 273           ctx->blitter.saved_fs != INVALID_PTR &&
 274           ctx->blitter.saved_vs != INVALID_PTR &&
 275           ctx->blitter.saved_velem_state != INVALID_PTR);
 276 }
 277
 278 static void blitter_restore_CSOs(struct blitter_context_priv *ctx)
 279 {
 280    struct pipe_context *pipe = ctx->pipe;
 281
 282    /* restore the state objects which are always required to be saved */
 283    pipe->bind_blend_state(pipe, ctx->blitter.saved_blend_state);
 284    pipe->bind_depth_stencil_alpha_state(pipe, ctx->blitter.saved_dsa_state);
 285    pipe->bind_rasterizer_state(pipe, ctx->blitter.saved_rs_state);
 286    pipe->bind_fs_state(pipe, ctx->blitter.saved_fs);
 287    pipe->bind_vs_state(pipe, ctx->blitter.saved_vs);
 288    pipe->bind_vertex_elements_state(pipe, ctx->blitter.saved_velem_state);
 289
 290    ctx->blitter.saved_blend_state = INVALID_PTR;
 291    ctx->blitter.saved_dsa_state = INVALID_PTR;
 292    ctx->blitter.saved_rs_state = INVALID_PTR;
 293    ctx->blitter.saved_fs = INVALID_PTR;
 294    ctx->blitter.saved_vs = INVALID_PTR;
 295    ctx->blitter.saved_velem_state = INVALID_PTR;
 296
 297    pipe->set_stencil_ref(pipe, &ctx->blitter.saved_stencil_ref);
 298
 299    pipe->set_viewport_state(pipe, &ctx->blitter.saved_viewport);
 300    pipe->set_clip_state(pipe, &ctx->blitter.saved_clip);
 301
 302    /* restore the state objects which are required to be saved before copy/fill
 303     */
 304    if (ctx->blitter.saved_fb_state.nr_cbufs != ~0) {
 305       pipe->set_framebuffer_state(pipe, &ctx->blitter.saved_fb_state);
 306       ctx->blitter.saved_fb_state.nr_cbufs = ~0;
 307    }
 308
 309    if (ctx->blitter.saved_num_sampler_states != ~0) {
 310       pipe->bind_fragment_sampler_states(pipe,
 311                                          ctx->blitter.saved_num_sampler_states,
 312                                          ctx->blitter.saved_sampler_states);
 313       ctx->blitter.saved_num_sampler_states = ~0;
 314    }
 315
 316    if (ctx->blitter.saved_num_sampler_views != ~0) {
 317       pipe->set_fragment_sampler_views(pipe,
 318                                        ctx->blitter.saved_num_sampler_views,
 319                                        ctx->blitter.saved_sampler_views);
 320       ctx->blitter.saved_num_sampler_views = ~0;
 321    }
 322
 323    if (ctx->blitter.saved_num_vertex_buffers != ~0) {
 324       pipe->set_vertex_buffers(pipe,
 325                                        ctx->blitter.saved_num_vertex_buffers,
 326                                        ctx->blitter.saved_vertex_buffers);
 327       ctx->blitter.saved_num_vertex_buffers = ~0;
 328    }
 329 }
 330
 331 static void blitter_set_rectangle(struct blitter_context_priv *ctx,
 332                                   unsigned x1, unsigned y1,
 333                                   unsigned x2, unsigned y2,
 334                                   unsigned width, unsigned height,
 335                                   float depth)
 336 {
 337    int i;
 338
 339    /* set vertex positions */
 340    ctx->vertices[0][0][0] = (float)x1 / width * 2.0f - 1.0f; /*v0.x*/
 341    ctx->vertices[0][0][1] = (float)y1 / height * 2.0f - 1.0f; /*v0.y*/
 342
 343    ctx->vertices[1][0][0] = (float)x2 / width * 2.0f - 1.0f; /*v1.x*/
 344    ctx->vertices[1][0][1] = (float)y1 / height * 2.0f - 1.0f; /*v1.y*/
 345
 346    ctx->vertices[2][0][0] = (float)x2 / width * 2.0f - 1.0f; /*v2.x*/
 347    ctx->vertices[2][0][1] = (float)y2 / height * 2.0f - 1.0f; /*v2.y*/
 348
 349    ctx->vertices[3][0][0] = (float)x1 / width * 2.0f - 1.0f; /*v3.x*/
 350    ctx->vertices[3][0][1] = (float)y2 / height * 2.0f - 1.0f; /*v3.y*/
 351
 352    for (i = 0; i < 4; i++)
 353       ctx->vertices[i][0][2] = depth; /*z*/
 354
 355    /* viewport */
 356    ctx->viewport.scale[0] = 0.5f * width;
 357    ctx->viewport.scale[1] = 0.5f * height;
 358    ctx->viewport.scale[2] = 1.0f;
 359    ctx->viewport.scale[3] = 1.0f;
 360    ctx->viewport.translate[0] = 0.5f * width;
 361    ctx->viewport.translate[1] = 0.5f * height;
 362    ctx->viewport.translate[2] = 0.0f;
 363    ctx->viewport.translate[3] = 0.0f;
 364    ctx->pipe->set_viewport_state(ctx->pipe, &ctx->viewport);
 365
 366    /* clip */
 367    ctx->pipe->set_clip_state(ctx->pipe, &ctx->clip);
 368 }
 369
 370 static void blitter_set_clear_color(struct blitter_context_priv *ctx,
 371                                     const float *rgba)
 372 {
 373    int i;
 374
 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 }
 382
 383 static void blitter_set_texcoords_2d(struct blitter_context_priv *ctx,
 384                                      struct pipe_surface *surf,
 385                                      unsigned x1, unsigned y1,
 386                                      unsigned x2, unsigned y2)
 387 {
 388    int i;
 389    float s1 = x1 / (float)surf->width;
 390    float t1 = y1 / (float)surf->height;
 391    float s2 = x2 / (float)surf->width;
 392    float t2 = y2 / (float)surf->height;
 393
 394    ctx->vertices[0][1][0] = s1; /*t0.s*/
 395    ctx->vertices[0][1][1] = t1; /*t0.t*/
 396
 397    ctx->vertices[1][1][0] = s2; /*t1.s*/
 398    ctx->vertices[1][1][1] = t1; /*t1.t*/
 399
 400    ctx->vertices[2][1][0] = s2; /*t2.s*/
 401    ctx->vertices[2][1][1] = t2; /*t2.t*/
 402
 403    ctx->vertices[3][1][0] = s1; /*t3.s*/
 404    ctx->vertices[3][1][1] = t2; /*t3.t*/
 405
 406    for (i = 0; i < 4; i++) {
 407       ctx->vertices[i][1][2] = 0; /*r*/
 408       ctx->vertices[i][1][3] = 1; /*q*/
 409    }
 410 }
 411
 412 static void blitter_set_texcoords_3d(struct blitter_context_priv *ctx,
 413                                      struct pipe_surface *surf,
 414                                      unsigned x1, unsigned y1,
 415                                      unsigned x2, unsigned y2)
 416 {
 417    int i;
 418    float depth = u_minify(surf->texture->depth0, surf->level);
 419    float r = surf->zslice / depth;
 420
 421    blitter_set_texcoords_2d(ctx, surf, x1, y1, x2, y2);
 422
 423    for (i = 0; i < 4; i++)
 424       ctx->vertices[i][1][2] = r; /*r*/
 425 }
 426
 427 static void blitter_set_texcoords_cube(struct blitter_context_priv *ctx,
 428                                        struct pipe_surface *surf,
 429                                        unsigned x1, unsigned y1,
 430                                        unsigned x2, unsigned y2)
 431 {
 432    int i;
 433    float s1 = x1 / (float)surf->width;
 434    float t1 = y1 / (float)surf->height;
 435    float s2 = x2 / (float)surf->width;
 436    float t2 = y2 / (float)surf->height;
 437    float st[4][2];
 438
 439    st[0][0] = s1;
 440    st[0][1] = t1;
 441    st[1][0] = s2;
 442    st[1][1] = t1;
 443    st[2][0] = s2;
 444    st[2][1] = t2;
 445    st[3][0] = s1;
 446    st[3][1] = t2;
 447
 448    util_map_texcoords2d_onto_cubemap(surf->face,
 449                                      /* pointer, stride in floats */
 450                                      &st[0][0], 2,
 451                                      &ctx->vertices[0][1][0], 8);
 452
 453    for (i = 0; i < 4; i++)
 454       ctx->vertices[i][1][3] = 1; /*q*/
 455 }
 456
 457 static void blitter_draw_quad(struct blitter_context_priv *ctx)
 458 {
 459    struct pipe_context *pipe = ctx->pipe;
 460
 461    /* write vertices and draw them */
 462    pipe_buffer_write(pipe, ctx->vbuf,
 463                      0, sizeof(ctx->vertices), ctx->vertices);
 464
 465    util_draw_vertex_buffer(pipe, ctx->vbuf, 0, PIPE_PRIM_TRIANGLE_FAN,
 466                            4,  /* verts */
 467                            2); /* attribs/vert */
 468 }
 469
 470 static INLINE
 471 void **blitter_get_sampler_state(struct blitter_context_priv *ctx,
 472                                  int miplevel)
 473 {
 474    struct pipe_context *pipe = ctx->pipe;
 475    struct pipe_sampler_state *sampler_state = &ctx->template_sampler_state;
 476
 477    assert(miplevel < PIPE_MAX_TEXTURE_LEVELS);
 478
 479    /* Create the sampler state on-demand. */
 480    if (!ctx->sampler_state[miplevel]) {
 481       sampler_state->lod_bias = miplevel;
 482       sampler_state->min_lod = miplevel;
 483       sampler_state->max_lod = miplevel;
 484
 485       ctx->sampler_state[miplevel] = pipe->create_sampler_state(pipe,
 486                                                                 sampler_state);
 487    }
 488
 489    /* Return void** so that it can be passed to bind_fragment_sampler_states
 490     * directly. */
 491    return &ctx->sampler_state[miplevel];
 492 }
 493
 494 static INLINE
 495 void *blitter_get_fs_col(struct blitter_context_priv *ctx, unsigned num_cbufs)
 496 {
 497    struct pipe_context *pipe = ctx->pipe;
 498    unsigned index = num_cbufs ? num_cbufs - 1 : 0;
 499
 500    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 501
 502    if (!ctx->fs_col[index])
 503       ctx->fs_col[index] =
 504          util_make_fragment_clonecolor_shader(pipe, num_cbufs);
 505
 506    return ctx->fs_col[index];
 507 }
 508
 509 static INLINE
 510 void *blitter_get_fs_texfetch_col(struct blitter_context_priv *ctx,
 511                                   unsigned tex_target)
 512 {
 513    struct pipe_context *pipe = ctx->pipe;
 514
 515    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 516
 517    /* Create the fragment shader on-demand. */
 518    if (!ctx->fs_texfetch_col[tex_target]) {
 519       switch (tex_target) {
 520          case PIPE_TEXTURE_1D:
 521             ctx->fs_texfetch_col[PIPE_TEXTURE_1D] =
 522                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_1D);
 523             break;
 524          case PIPE_TEXTURE_2D:
 525             ctx->fs_texfetch_col[PIPE_TEXTURE_2D] =
 526                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D);
 527             break;
 528          case PIPE_TEXTURE_3D:
 529             ctx->fs_texfetch_col[PIPE_TEXTURE_3D] =
 530                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_3D);
 531             break;
 532          case PIPE_TEXTURE_CUBE:
 533             ctx->fs_texfetch_col[PIPE_TEXTURE_CUBE] =
 534                util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_CUBE);
 535             break;
 536          default:;
 537       }
 538    }
 539
 540    return ctx->fs_texfetch_col[tex_target];
 541 }
 542
 543 static INLINE
 544 void *blitter_get_fs_texfetch_depth(struct blitter_context_priv *ctx,
 545                                     unsigned tex_target)
 546 {
 547    struct pipe_context *pipe = ctx->pipe;
 548
 549    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 550
 551    /* Create the fragment shader on-demand. */
 552    if (!ctx->fs_texfetch_depth[tex_target]) {
 553       switch (tex_target) {
 554          case PIPE_TEXTURE_1D:
 555             ctx->fs_texfetch_depth[PIPE_TEXTURE_1D] =
 556                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_1D);
 557             break;
 558          case PIPE_TEXTURE_2D:
 559             ctx->fs_texfetch_depth[PIPE_TEXTURE_2D] =
 560                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_2D);
 561             break;
 562          case PIPE_TEXTURE_3D:
 563             ctx->fs_texfetch_depth[PIPE_TEXTURE_3D] =
 564                util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_3D);
 565             break;
 566          case PIPE_TEXTURE_CUBE:
 567             ctx->fs_texfetch_depth[PIPE_TEXTURE_CUBE] =
 568                util_make_fragment_tex_shader_writedepth(pipe,TGSI_TEXTURE_CUBE);
 569             break;
 570          default:;
 571       }
 572    }
 573
 574    return ctx->fs_texfetch_depth[tex_target];
 575 }
 576
 577 void util_blitter_clear(struct blitter_context *blitter,
 578                         unsigned width, unsigned height,
 579                         unsigned num_cbufs,
 580                         unsigned clear_buffers,
 581                         const float *rgba,
 582                         double depth, unsigned stencil)
 583 {
 584    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 585    struct pipe_context *pipe = ctx->pipe;
 586    struct pipe_stencil_ref sr = { { 0 } };
 587
 588    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 589
 590    blitter_check_saved_CSOs(ctx);
 591
 592    /* bind CSOs */
 593    if (clear_buffers & PIPE_CLEAR_COLOR)
 594       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 595    else
 596       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 597
 598    if (clear_buffers & PIPE_CLEAR_DEPTHSTENCIL) {
 599       sr.ref_value[0] = stencil & 0xff;
 600       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_write_depth_stencil);
 601       pipe->set_stencil_ref(pipe, &sr);
 602    }
 603    else
 604       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 605
 606    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 607    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 608    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, num_cbufs));
 609    pipe->bind_vs_state(pipe, ctx->vs_col);
 610
 611    blitter_set_clear_color(ctx, rgba);
 612    blitter_set_rectangle(ctx, 0, 0, width, height, width, height, depth);
 613    blitter_draw_quad(ctx);
 614    blitter_restore_CSOs(ctx);
 615 }
 616
 617 static boolean
 618 is_overlap(unsigned sx1, unsigned sx2, unsigned sy1, unsigned sy2,
 619            unsigned dx1, unsigned dx2, unsigned dy1, unsigned dy2)
 620 {
 621     if (sx1 >= dx2 || sx2 <= dx1 || sy1 >= dy2 || sy2 <= dy1) {
 622         return FALSE;
 623     } else {
 624         return TRUE;
 625     }
 626 }
 627
 628 static void util_blitter_do_copy(struct blitter_context *blitter,
 629                                  struct pipe_surface *dst,
 630                                  unsigned dstx, unsigned dsty,
 631                                  struct pipe_surface *src,
 632                                  unsigned srcx, unsigned srcy,
 633                                  unsigned width, unsigned height,
 634                                  boolean is_depth)
 635 {
 636    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 637    struct pipe_context *pipe = ctx->pipe;
 638    struct pipe_framebuffer_state fb_state;
 639    struct pipe_sampler_view viewTempl, *view;
 640
 641    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 642    assert(blitter->saved_num_sampler_views != ~0);
 643    assert(blitter->saved_num_sampler_states != ~0);
 644    assert(src->texture->target < PIPE_MAX_TEXTURE_TYPES);
 645
 646    /* bind CSOs */
 647    fb_state.width = dst->width;
 648    fb_state.height = dst->height;
 649
 650    if (is_depth) {
 651       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 652       pipe->bind_depth_stencil_alpha_state(pipe,
 653                                            ctx->dsa_write_depth_keep_stencil);
 654       pipe->bind_fs_state(pipe,
 655          blitter_get_fs_texfetch_depth(ctx, src->texture->target));
 656
 657       fb_state.nr_cbufs = 0;
 658       fb_state.zsbuf = dst;
 659    } else {
 660       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 661       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 662       pipe->bind_fs_state(pipe,
 663          blitter_get_fs_texfetch_col(ctx, src->texture->target));
 664
 665       fb_state.nr_cbufs = 1;
 666       fb_state.cbufs[0] = dst;
 667       fb_state.zsbuf = 0;
 668    }
 669
 670    u_sampler_view_default_template(&viewTempl,
 671                                    src->texture,
 672                                    src->texture->format);
 673    view = pipe->create_sampler_view(pipe,
 674                                     src->texture,
 675                                     &viewTempl);
 676
 677    if (ctx->sampler_view) {
 678       pipe_sampler_view_reference(&ctx->sampler_view, NULL);
 679    }
 680    ctx->sampler_view = view;
 681
 682    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 683    pipe->bind_vs_state(pipe, ctx->vs_tex);
 684    pipe->bind_fragment_sampler_states(pipe, 1,
 685       blitter_get_sampler_state(ctx, src->level));
 686    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 687    pipe->set_fragment_sampler_views(pipe, 1, &view);
 688    pipe->set_framebuffer_state(pipe, &fb_state);
 689
 690    /* set texture coordinates */
 691    switch (src->texture->target) {
 692       case PIPE_TEXTURE_1D:
 693       case PIPE_TEXTURE_2D:
 694          blitter_set_texcoords_2d(ctx, src, srcx, srcy,
 695                                   srcx+width, srcy+height);
 696          break;
 697       case PIPE_TEXTURE_3D:
 698          blitter_set_texcoords_3d(ctx, src, srcx, srcy,
 699                                   srcx+width, srcy+height);
 700          break;
 701       case PIPE_TEXTURE_CUBE:
 702          blitter_set_texcoords_cube(ctx, src, srcx, srcy,
 703                                     srcx+width, srcy+height);
 704          break;
 705       default:
 706          assert(0);
 707    }
 708
 709    blitter_set_rectangle(ctx, dstx, dsty, dstx+width, dsty+height, dst->width, dst->height, 0);
 710    blitter_draw_quad(ctx);
 711
 712 }
 713
 714 static void util_blitter_overlap_copy(struct blitter_context *blitter,
 715                                       struct pipe_surface *dst,
 716                                       unsigned dstx, unsigned dsty,
 717                                       struct pipe_surface *src,
 718                                       unsigned srcx, unsigned srcy,
 719                                       unsigned width, unsigned height)
 720 {
 721    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 722    struct pipe_context *pipe = ctx->pipe;
 723    struct pipe_screen *screen = pipe->screen;
 724
 725    struct pipe_resource texTemp;
 726    struct pipe_resource *texture;
 727    struct pipe_surface *tex_surf;
 728
 729    /* check whether the states are properly saved */
 730    blitter_check_saved_CSOs(ctx);
 731
 732    memset(&texTemp, 0, sizeof(texTemp));
 733    texTemp.target = PIPE_TEXTURE_2D;
 734    texTemp.format = dst->texture->format; /* XXX verify supported by driver! */
 735    texTemp.last_level = 0;
 736    texTemp.width0 = width;
 737    texTemp.height0 = height;
 738    texTemp.depth0 = 1;
 739
 740    texture = screen->resource_create(screen, &texTemp);
 741    if (!texture)
 742       return;
 743
 744    tex_surf = screen->get_tex_surface(screen, texture, 0, 0, 0,
 745                                       PIPE_BIND_BLIT_SOURCE |
 746                                       PIPE_BIND_BLIT_DESTINATION);
 747
 748    /* blit from the src to the temp */
 749    util_blitter_do_copy(blitter, tex_surf, 0, 0,
 750                         src, srcx, srcy,
 751                         width, height,
 752                         FALSE);
 753    util_blitter_do_copy(blitter, dst, dstx, dsty,
 754                         tex_surf, 0, 0,
 755                         width, height,
 756                         FALSE);
 757    pipe_surface_reference(&tex_surf, NULL);
 758    pipe_resource_reference(&texture, NULL);
 759    blitter_restore_CSOs(ctx);
 760 }
 761
 762 void util_blitter_copy(struct blitter_context *blitter,
 763                        struct pipe_surface *dst,
 764                        unsigned dstx, unsigned dsty,
 765                        struct pipe_surface *src,
 766                        unsigned srcx, unsigned srcy,
 767                        unsigned width, unsigned height,
 768                        boolean ignore_stencil)
 769 {
 770    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 771    struct pipe_context *pipe = ctx->pipe;
 772    struct pipe_screen *screen = pipe->screen;
 773    boolean is_stencil, is_depth;
 774    unsigned dst_tex_usage;
 775
 776    /* give up if textures are not set */
 777    assert(dst->texture && src->texture);
 778    if (!dst->texture || !src->texture)
 779       return;
 780
 781    if (dst->texture == src->texture) {
 782       if (is_overlap(srcx, srcx + width, srcy, srcy + height,
 783                              dstx, dstx + width, dsty, dsty + height)) {
 784          util_blitter_overlap_copy(blitter, dst, dstx, dsty, src, srcx, srcy,
 785                                    width, height);
 786          return;
 787       }
 788    }
 789
 790    is_depth = util_format_get_component_bits(src->format, UTIL_FORMAT_COLORSPACE_ZS, 0) != 0;
 791    is_stencil = util_format_get_component_bits(src->format, UTIL_FORMAT_COLORSPACE_ZS, 1) != 0;
 792    dst_tex_usage = is_depth || is_stencil ? PIPE_BIND_DEPTH_STENCIL :
 793                                             PIPE_BIND_RENDER_TARGET;
 794
 795    /* check if we can sample from and render to the surfaces */
 796    /* (assuming copying a stencil buffer is not possible) */
 797    if ((!ignore_stencil && is_stencil) ||
 798        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 799                                     dst_tex_usage, 0) ||
 800        !screen->is_format_supported(screen, src->format, src->texture->target,
 801                                     PIPE_BIND_SAMPLER_VIEW, 0)) {
 802       util_surface_copy(pipe, FALSE, dst, dstx, dsty, src, srcx, srcy,
 803                         width, height);
 804       return;
 805    }
 806
 807    /* check whether the states are properly saved */
 808    blitter_check_saved_CSOs(ctx);
 809    util_blitter_do_copy(blitter,
 810                         dst, dstx, dsty,
 811                         src, srcx, srcy,
 812                         width, height, is_depth);
 813    blitter_restore_CSOs(ctx);
 814 }
 815
 816 void util_blitter_fill(struct blitter_context *blitter,
 817                        struct pipe_surface *dst,
 818                        unsigned dstx, unsigned dsty,
 819                        unsigned width, unsigned height,
 820                        unsigned value)
 821 {
 822    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 823    struct pipe_context *pipe = ctx->pipe;
 824    struct pipe_screen *screen = pipe->screen;
 825    struct pipe_framebuffer_state fb_state;
 826    float rgba[4];
 827    ubyte ub_rgba[4] = {0};
 828    union util_color color;
 829    int i;
 830
 831    assert(dst->texture);
 832    if (!dst->texture)
 833       return;
 834
 835    /* check if we can render to the surface */
 836    if (util_format_is_depth_or_stencil(dst->format) || /* unlikely, but you never know */
 837        !screen->is_format_supported(screen, dst->format, dst->texture->target,
 838                                     PIPE_BIND_RENDER_TARGET, 0)) {
 839       util_surface_fill(pipe, dst, dstx, dsty, width, height, value);
 840       return;
 841    }
 842
 843    /* unpack the color */
 844    color.ui = value;
 845    util_unpack_color_ub(dst->format, &color,
 846                         ub_rgba, ub_rgba+1, ub_rgba+2, ub_rgba+3);
 847    for (i = 0; i < 4; i++)
 848       rgba[i] = ubyte_to_float(ub_rgba[i]);
 849
 850    /* check the saved state */
 851    blitter_check_saved_CSOs(ctx);
 852    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 853
 854    /* bind CSOs */
 855    pipe->bind_blend_state(pipe, ctx->blend_write_color);
 856    pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 857    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 858    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 1));
 859    pipe->bind_vs_state(pipe, ctx->vs_col);
 860    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 861
 862    /* set a framebuffer state */
 863    fb_state.width = dst->width;
 864    fb_state.height = dst->height;
 865    fb_state.nr_cbufs = 1;
 866    fb_state.cbufs[0] = dst;
 867    fb_state.zsbuf = 0;
 868    pipe->set_framebuffer_state(pipe, &fb_state);
 869
 870    blitter_set_clear_color(ctx, rgba);
 871    blitter_set_rectangle(ctx, 0, 0, width, height, dst->width, dst->height, 0);
 872    blitter_draw_quad(ctx);
 873    blitter_restore_CSOs(ctx);
 874 }