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, clear_render_target, clear_depth_stencil
  30  * resource_copy_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    void *dsa_keep_depth_write_stencil;
  92
  93    void *velem_state;
  94
  95    /* Sampler state for clamping to a miplevel. */
  96    void *sampler_state[PIPE_MAX_TEXTURE_LEVELS];
  97
  98    /* Rasterizer state. */
  99    void *rs_state;
 100
 101    struct pipe_sampler_view *sampler_view;
 102
 103    /* Viewport state. */
 104    struct pipe_viewport_state viewport;
 105
 106    /* Clip state. */
 107    struct pipe_clip_state clip;
 108 };
 109
 110 struct blitter_context *util_blitter_create(struct pipe_context *pipe)
 111 {
 112    struct blitter_context_priv *ctx;
 113    struct pipe_blend_state blend;
 114    struct pipe_depth_stencil_alpha_state dsa;
 115    struct pipe_rasterizer_state rs_state;
 116    struct pipe_sampler_state *sampler_state;
 117    struct pipe_vertex_element velem[2];
 118    unsigned i;
 119
 120    ctx = CALLOC_STRUCT(blitter_context_priv);
 121    if (!ctx)
 122       return NULL;
 123
 124    ctx->pipe = pipe;
 125
 126    /* init state objects for them to be considered invalid */
 127    ctx->blitter.saved_blend_state = INVALID_PTR;
 128    ctx->blitter.saved_dsa_state = INVALID_PTR;
 129    ctx->blitter.saved_rs_state = INVALID_PTR;
 130    ctx->blitter.saved_fs = INVALID_PTR;
 131    ctx->blitter.saved_vs = INVALID_PTR;
 132    ctx->blitter.saved_velem_state = INVALID_PTR;
 133    ctx->blitter.saved_fb_state.nr_cbufs = ~0;
 134    ctx->blitter.saved_num_sampler_views = ~0;
 135    ctx->blitter.saved_num_sampler_states = ~0;
 136    ctx->blitter.saved_num_vertex_buffers = ~0;
 137
 138    /* blend state objects */
 139    memset(&blend, 0, sizeof(blend));
 140    ctx->blend_keep_color = pipe->create_blend_state(pipe, &blend);
 141
 142    blend.rt[0].colormask = PIPE_MASK_RGBA;
 143    ctx->blend_write_color = pipe->create_blend_state(pipe, &blend);
 144
 145    /* depth stencil alpha state objects */
 146    memset(&dsa, 0, sizeof(dsa));
 147    ctx->dsa_keep_depth_stencil =
 148       pipe->create_depth_stencil_alpha_state(pipe, &dsa);
 149
 150    dsa.depth.enabled = 1;
 151    dsa.depth.writemask = 1;
 152    dsa.depth.func = PIPE_FUNC_ALWAYS;
 153    ctx->dsa_write_depth_keep_stencil =
 154       pipe->create_depth_stencil_alpha_state(pipe, &dsa);
 155
 156    dsa.stencil[0].enabled = 1;
 157    dsa.stencil[0].func = PIPE_FUNC_ALWAYS;
 158    dsa.stencil[0].fail_op = PIPE_STENCIL_OP_REPLACE;
 159    dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE;
 160    dsa.stencil[0].zfail_op = PIPE_STENCIL_OP_REPLACE;
 161    dsa.stencil[0].valuemask = 0xff;
 162    dsa.stencil[0].writemask = 0xff;
 163    ctx->dsa_write_depth_stencil =
 164       pipe->create_depth_stencil_alpha_state(pipe, &dsa);
 165
 166
 167    dsa.depth.enabled = 0;
 168    dsa.depth.writemask = 0;
 169    ctx->dsa_keep_depth_write_stencil =
 170       pipe->create_depth_stencil_alpha_state(pipe, &dsa);
 171
 172    /* sampler state */
 173    sampler_state = &ctx->template_sampler_state;
 174    sampler_state->wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 175    sampler_state->wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 176    sampler_state->wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 177    sampler_state->normalized_coords = TRUE;
 178    /* The sampler state objects which sample from a specified mipmap level
 179     * are created on-demand. */
 180
 181    /* rasterizer state */
 182    memset(&rs_state, 0, sizeof(rs_state));
 183    rs_state.cull_face = PIPE_FACE_NONE;
 184    rs_state.gl_rasterization_rules = 1;
 185    rs_state.flatshade = 1;
 186    ctx->rs_state = pipe->create_rasterizer_state(pipe, &rs_state);
 187
 188    /* vertex elements state */
 189    memset(&velem[0], 0, sizeof(velem[0]) * 2);
 190    for (i = 0; i < 2; i++) {
 191       velem[i].src_offset = i * 4 * sizeof(float);
 192       velem[i].instance_divisor = 0;
 193       velem[i].vertex_buffer_index = 0;
 194       velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 195    }
 196    ctx->velem_state = pipe->create_vertex_elements_state(pipe, 2, &velem[0]);
 197
 198    /* fragment shaders are created on-demand */
 199
 200    /* vertex shaders */
 201    {
 202       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 203                                       TGSI_SEMANTIC_COLOR };
 204       const uint semantic_indices[] = { 0, 0 };
 205       ctx->vs_col =
 206          util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 207                                              semantic_indices);
 208    }
 209    {
 210       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 211                                       TGSI_SEMANTIC_GENERIC };
 212       const uint semantic_indices[] = { 0, 0 };
 213       ctx->vs_tex =
 214          util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 215                                              semantic_indices);
 216    }
 217
 218    /* set invariant vertex coordinates */
 219    for (i = 0; i < 4; i++)
 220       ctx->vertices[i][0][3] = 1; /*v.w*/
 221
 222    /* create the vertex buffer */
 223    ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
 224                                   PIPE_BIND_VERTEX_BUFFER,
 225                                   sizeof(ctx->vertices));
 226
 227    return &ctx->blitter;
 228 }
 229
 230 void util_blitter_destroy(struct blitter_context *blitter)
 231 {
 232    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 233    struct pipe_context *pipe = ctx->pipe;
 234    int i;
 235
 236    pipe->delete_blend_state(pipe, ctx->blend_write_color);
 237    pipe->delete_blend_state(pipe, ctx->blend_keep_color);
 238    pipe->delete_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 239    pipe->delete_depth_stencil_alpha_state(pipe,
 240                                           ctx->dsa_write_depth_keep_stencil);
 241    pipe->delete_depth_stencil_alpha_state(pipe, ctx->dsa_write_depth_stencil);
 242    pipe->delete_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_write_stencil);
 243
 244    pipe->delete_rasterizer_state(pipe, ctx->rs_state);
 245    pipe->delete_vs_state(pipe, ctx->vs_col);
 246    pipe->delete_vs_state(pipe, ctx->vs_tex);
 247    pipe->delete_vertex_elements_state(pipe, ctx->velem_state);
 248
 249    for (i = 0; i < PIPE_MAX_TEXTURE_TYPES; i++) {
 250       if (ctx->fs_texfetch_col[i])
 251          pipe->delete_fs_state(pipe, ctx->fs_texfetch_col[i]);
 252       if (ctx->fs_texfetch_depth[i])
 253          pipe->delete_fs_state(pipe, ctx->fs_texfetch_depth[i]);
 254    }
 255
 256    for (i = 0; i <= PIPE_MAX_COLOR_BUFS && ctx->fs_col[i]; i++)
 257       if (ctx->fs_col[i])
 258          pipe->delete_fs_state(pipe, ctx->fs_col[i]);
 259
 260    for (i = 0; i < PIPE_MAX_TEXTURE_LEVELS; i++)
 261       if (ctx->sampler_state[i])
 262          pipe->delete_sampler_state(pipe, ctx->sampler_state[i]);
 263
 264    if (ctx->sampler_view) {
 265       pipe_sampler_view_reference(&ctx->sampler_view, NULL);
 266    }
 267
 268    pipe_resource_reference(&ctx->vbuf, NULL);
 269    FREE(ctx);
 270 }
 271
 272 static void blitter_check_saved_CSOs(struct blitter_context_priv *ctx)
 273 {
 274    /* make sure these CSOs have been saved */
 275    assert(ctx->blitter.saved_blend_state != INVALID_PTR &&
 276           ctx->blitter.saved_dsa_state != INVALID_PTR &&
 277           ctx->blitter.saved_rs_state != INVALID_PTR &&
 278           ctx->blitter.saved_fs != INVALID_PTR &&
 279           ctx->blitter.saved_vs != INVALID_PTR &&
 280           ctx->blitter.saved_velem_state != INVALID_PTR);
 281 }
 282
 283 static void blitter_restore_CSOs(struct blitter_context_priv *ctx)
 284 {
 285    struct pipe_context *pipe = ctx->pipe;
 286
 287    /* restore the state objects which are always required to be saved */
 288    pipe->bind_blend_state(pipe, ctx->blitter.saved_blend_state);
 289    pipe->bind_depth_stencil_alpha_state(pipe, ctx->blitter.saved_dsa_state);
 290    pipe->bind_rasterizer_state(pipe, ctx->blitter.saved_rs_state);
 291    pipe->bind_fs_state(pipe, ctx->blitter.saved_fs);
 292    pipe->bind_vs_state(pipe, ctx->blitter.saved_vs);
 293    pipe->bind_vertex_elements_state(pipe, ctx->blitter.saved_velem_state);
 294
 295    ctx->blitter.saved_blend_state = INVALID_PTR;
 296    ctx->blitter.saved_dsa_state = INVALID_PTR;
 297    ctx->blitter.saved_rs_state = INVALID_PTR;
 298    ctx->blitter.saved_fs = INVALID_PTR;
 299    ctx->blitter.saved_vs = INVALID_PTR;
 300    ctx->blitter.saved_velem_state = INVALID_PTR;
 301
 302    pipe->set_stencil_ref(pipe, &ctx->blitter.saved_stencil_ref);
 303
 304    pipe->set_viewport_state(pipe, &ctx->blitter.saved_viewport);
 305    pipe->set_clip_state(pipe, &ctx->blitter.saved_clip);
 306
 307    /* restore the state objects which are required to be saved before copy/fill
 308     */
 309    if (ctx->blitter.saved_fb_state.nr_cbufs != ~0) {
 310       pipe->set_framebuffer_state(pipe, &ctx->blitter.saved_fb_state);
 311       ctx->blitter.saved_fb_state.nr_cbufs = ~0;
 312    }
 313
 314    if (ctx->blitter.saved_num_sampler_states != ~0) {
 315       pipe->bind_fragment_sampler_states(pipe,
 316                                          ctx->blitter.saved_num_sampler_states,
 317                                          ctx->blitter.saved_sampler_states);
 318       ctx->blitter.saved_num_sampler_states = ~0;
 319    }
 320
 321    if (ctx->blitter.saved_num_sampler_views != ~0) {
 322       pipe->set_fragment_sampler_views(pipe,
 323                                        ctx->blitter.saved_num_sampler_views,
 324                                        ctx->blitter.saved_sampler_views);
 325       ctx->blitter.saved_num_sampler_views = ~0;
 326    }
 327
 328    if (ctx->blitter.saved_num_vertex_buffers != ~0) {
 329       pipe->set_vertex_buffers(pipe,
 330                                ctx->blitter.saved_num_vertex_buffers,
 331                                ctx->blitter.saved_vertex_buffers);
 332       ctx->blitter.saved_num_vertex_buffers = ~0;
 333    }
 334 }
 335
 336 static void blitter_set_rectangle(struct blitter_context_priv *ctx,
 337                                   unsigned x1, unsigned y1,
 338                                   unsigned x2, unsigned y2,
 339                                   unsigned width, unsigned height,
 340                                   float depth)
 341 {
 342    int i;
 343
 344    /* set vertex positions */
 345    ctx->vertices[0][0][0] = (float)x1 / width * 2.0f - 1.0f; /*v0.x*/
 346    ctx->vertices[0][0][1] = (float)y1 / height * 2.0f - 1.0f; /*v0.y*/
 347
 348    ctx->vertices[1][0][0] = (float)x2 / width * 2.0f - 1.0f; /*v1.x*/
 349    ctx->vertices[1][0][1] = (float)y1 / height * 2.0f - 1.0f; /*v1.y*/
 350
 351    ctx->vertices[2][0][0] = (float)x2 / width * 2.0f - 1.0f; /*v2.x*/
 352    ctx->vertices[2][0][1] = (float)y2 / height * 2.0f - 1.0f; /*v2.y*/
 353
 354    ctx->vertices[3][0][0] = (float)x1 / width * 2.0f - 1.0f; /*v3.x*/
 355    ctx->vertices[3][0][1] = (float)y2 / height * 2.0f - 1.0f; /*v3.y*/
 356
 357    for (i = 0; i < 4; i++)
 358       ctx->vertices[i][0][2] = depth; /*z*/
 359
 360    /* viewport */
 361    ctx->viewport.scale[0] = 0.5f * width;
 362    ctx->viewport.scale[1] = 0.5f * height;
 363    ctx->viewport.scale[2] = 1.0f;
 364    ctx->viewport.scale[3] = 1.0f;
 365    ctx->viewport.translate[0] = 0.5f * width;
 366    ctx->viewport.translate[1] = 0.5f * height;
 367    ctx->viewport.translate[2] = 0.0f;
 368    ctx->viewport.translate[3] = 0.0f;
 369    ctx->pipe->set_viewport_state(ctx->pipe, &ctx->viewport);
 370
 371    /* clip */
 372    ctx->pipe->set_clip_state(ctx->pipe, &ctx->clip);
 373 }
 374
 375 static void blitter_set_clear_color(struct blitter_context_priv *ctx,
 376                                     const float *rgba)
 377 {
 378    int i;
 379
 380    if (rgba) {
 381       for (i = 0; i < 4; i++) {
 382          ctx->vertices[i][1][0] = rgba[0];
 383          ctx->vertices[i][1][1] = rgba[1];
 384          ctx->vertices[i][1][2] = rgba[2];
 385          ctx->vertices[i][1][3] = rgba[3];
 386       }
 387    } else {
 388       for (i = 0; i < 4; i++) {
 389          ctx->vertices[i][1][0] = 0;
 390          ctx->vertices[i][1][1] = 0;
 391          ctx->vertices[i][1][2] = 0;
 392          ctx->vertices[i][1][3] = 0;
 393       }
 394    }
 395 }
 396
 397 static void blitter_set_texcoords_2d(struct blitter_context_priv *ctx,
 398                                      struct pipe_resource *src,
 399                                      struct pipe_subresource subsrc,
 400                                      unsigned x1, unsigned y1,
 401                                      unsigned x2, unsigned y2)
 402 {
 403    int i;
 404    float s1 = x1 / (float)u_minify(src->width0,  subsrc.level);
 405    float t1 = y1 / (float)u_minify(src->height0, subsrc.level);
 406    float s2 = x2 / (float)u_minify(src->width0,  subsrc.level);
 407    float t2 = y2 / (float)u_minify(src->height0, subsrc.level);
 408
 409    ctx->vertices[0][1][0] = s1; /*t0.s*/
 410    ctx->vertices[0][1][1] = t1; /*t0.t*/
 411
 412    ctx->vertices[1][1][0] = s2; /*t1.s*/
 413    ctx->vertices[1][1][1] = t1; /*t1.t*/
 414
 415    ctx->vertices[2][1][0] = s2; /*t2.s*/
 416    ctx->vertices[2][1][1] = t2; /*t2.t*/
 417
 418    ctx->vertices[3][1][0] = s1; /*t3.s*/
 419    ctx->vertices[3][1][1] = t2; /*t3.t*/
 420
 421    for (i = 0; i < 4; i++) {
 422       ctx->vertices[i][1][2] = 0; /*r*/
 423       ctx->vertices[i][1][3] = 1; /*q*/
 424    }
 425 }
 426
 427 static void blitter_set_texcoords_3d(struct blitter_context_priv *ctx,
 428                                      struct pipe_resource *src,
 429                                      struct pipe_subresource subsrc,
 430                                      unsigned zslice,
 431                                      unsigned x1, unsigned y1,
 432                                      unsigned x2, unsigned y2)
 433 {
 434    int i;
 435    float r = zslice / (float)u_minify(src->depth0, subsrc.level);
 436
 437    blitter_set_texcoords_2d(ctx, src, subsrc, x1, y1, x2, y2);
 438
 439    for (i = 0; i < 4; i++)
 440       ctx->vertices[i][1][2] = r; /*r*/
 441 }
 442
 443 static void blitter_set_texcoords_cube(struct blitter_context_priv *ctx,
 444                                        struct pipe_resource *src,
 445                                        struct pipe_subresource subsrc,
 446                                        unsigned x1, unsigned y1,
 447                                        unsigned x2, unsigned y2)
 448 {
 449    int i;
 450    float s1 = x1 / (float)u_minify(src->width0,  subsrc.level);
 451    float t1 = y1 / (float)u_minify(src->height0, subsrc.level);
 452    float s2 = x2 / (float)u_minify(src->width0,  subsrc.level);
 453    float t2 = y2 / (float)u_minify(src->height0, subsrc.level);
 454    float st[4][2];
 455
 456    st[0][0] = s1;
 457    st[0][1] = t1;
 458    st[1][0] = s2;
 459    st[1][1] = t1;
 460    st[2][0] = s2;
 461    st[2][1] = t2;
 462    st[3][0] = s1;
 463    st[3][1] = t2;
 464
 465    util_map_texcoords2d_onto_cubemap(subsrc.face,
 466                                      /* pointer, stride in floats */
 467                                      &st[0][0], 2,
 468                                      &ctx->vertices[0][1][0], 8);
 469
 470    for (i = 0; i < 4; i++)
 471       ctx->vertices[i][1][3] = 1; /*q*/
 472 }
 473
 474 static void blitter_draw_quad(struct blitter_context_priv *ctx)
 475 {
 476    struct pipe_context *pipe = ctx->pipe;
 477
 478    /* write vertices and draw them */
 479    pipe_buffer_write(pipe, ctx->vbuf,
 480                      0, sizeof(ctx->vertices), ctx->vertices);
 481
 482    util_draw_vertex_buffer(pipe, ctx->vbuf, 0, PIPE_PRIM_TRIANGLE_FAN,
 483                            4,  /* verts */
 484                            2); /* attribs/vert */
 485 }
 486
 487 static INLINE
 488 void **blitter_get_sampler_state(struct blitter_context_priv *ctx,
 489                                  int miplevel)
 490 {
 491    struct pipe_context *pipe = ctx->pipe;
 492    struct pipe_sampler_state *sampler_state = &ctx->template_sampler_state;
 493
 494    assert(miplevel < PIPE_MAX_TEXTURE_LEVELS);
 495
 496    /* Create the sampler state on-demand. */
 497    if (!ctx->sampler_state[miplevel]) {
 498       sampler_state->lod_bias = miplevel;
 499       sampler_state->min_lod = miplevel;
 500       sampler_state->max_lod = miplevel;
 501
 502       ctx->sampler_state[miplevel] = pipe->create_sampler_state(pipe,
 503                                                                 sampler_state);
 504    }
 505
 506    /* Return void** so that it can be passed to bind_fragment_sampler_states
 507     * directly. */
 508    return &ctx->sampler_state[miplevel];
 509 }
 510
 511 static INLINE
 512 void *blitter_get_fs_col(struct blitter_context_priv *ctx, unsigned num_cbufs)
 513 {
 514    struct pipe_context *pipe = ctx->pipe;
 515
 516    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 517
 518    if (!ctx->fs_col[num_cbufs])
 519       ctx->fs_col[num_cbufs] =
 520          util_make_fragment_clonecolor_shader(pipe, num_cbufs);
 521
 522    return ctx->fs_col[num_cbufs];
 523 }
 524
 525 /** Convert PIPE_TEXTURE_x to TGSI_TEXTURE_x */
 526 static unsigned
 527 pipe_tex_to_tgsi_tex(unsigned pipe_tex_target)
 528 {
 529    switch (pipe_tex_target) {
 530    case PIPE_TEXTURE_1D:
 531       return TGSI_TEXTURE_1D;
 532    case PIPE_TEXTURE_2D:
 533       return TGSI_TEXTURE_2D;
 534    case PIPE_TEXTURE_3D:
 535       return TGSI_TEXTURE_3D;
 536    case PIPE_TEXTURE_CUBE:
 537       return TGSI_TEXTURE_CUBE;
 538    default:
 539       assert(0 && "unexpected texture target");
 540       return TGSI_TEXTURE_UNKNOWN;
 541    }
 542 }
 543
 544
 545 static INLINE
 546 void *blitter_get_fs_texfetch_col(struct blitter_context_priv *ctx,
 547                                   unsigned tex_target)
 548 {
 549    struct pipe_context *pipe = ctx->pipe;
 550
 551    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 552
 553    /* Create the fragment shader on-demand. */
 554    if (!ctx->fs_texfetch_col[tex_target]) {
 555       unsigned tgsi_tex = pipe_tex_to_tgsi_tex(tex_target);
 556
 557       ctx->fs_texfetch_col[tex_target] =
 558         util_make_fragment_tex_shader(pipe, tgsi_tex, TGSI_INTERPOLATE_LINEAR);
 559    }
 560
 561    return ctx->fs_texfetch_col[tex_target];
 562 }
 563
 564 static INLINE
 565 void *blitter_get_fs_texfetch_depth(struct blitter_context_priv *ctx,
 566                                     unsigned tex_target)
 567 {
 568    struct pipe_context *pipe = ctx->pipe;
 569
 570    assert(tex_target < PIPE_MAX_TEXTURE_TYPES);
 571
 572    /* Create the fragment shader on-demand. */
 573    if (!ctx->fs_texfetch_depth[tex_target]) {
 574       unsigned tgsi_tex = pipe_tex_to_tgsi_tex(tex_target);
 575
 576       ctx->fs_texfetch_depth[tex_target] =
 577          util_make_fragment_tex_shader_writedepth(pipe, tgsi_tex,
 578                                                   TGSI_INTERPOLATE_LINEAR);
 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) == 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 if (clear_buffers & PIPE_CLEAR_DEPTH) {
 611       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_write_depth_keep_stencil);
 612    }
 613    else if (clear_buffers & PIPE_CLEAR_STENCIL) {
 614       sr.ref_value[0] = stencil & 0xff;
 615       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_write_stencil);
 616       pipe->set_stencil_ref(pipe, &sr);
 617    }
 618    else
 619       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 620
 621    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 622    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 623    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, num_cbufs));
 624    pipe->bind_vs_state(pipe, ctx->vs_col);
 625
 626    blitter_set_clear_color(ctx, rgba);
 627    blitter_set_rectangle(ctx, 0, 0, width, height, width, height, depth);
 628    blitter_draw_quad(ctx);
 629    blitter_restore_CSOs(ctx);
 630 }
 631
 632 static
 633 boolean is_overlap(unsigned sx1, unsigned sx2, unsigned sy1, unsigned sy2,
 634                    unsigned dx1, unsigned dx2, unsigned dy1, unsigned dy2)
 635 {
 636    return sx1 < dx2 && sx2 > dx1 && sy1 < dy2 && sy2 > dy1;
 637 }
 638
 639 void util_blitter_copy_region(struct blitter_context *blitter,
 640                               struct pipe_resource *dst,
 641                               struct pipe_subresource subdst,
 642                               unsigned dstx, unsigned dsty, unsigned dstz,
 643                               struct pipe_resource *src,
 644                               struct pipe_subresource subsrc,
 645                               unsigned srcx, unsigned srcy, unsigned srcz,
 646                               unsigned width, unsigned height,
 647                               boolean ignore_stencil)
 648 {
 649    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 650    struct pipe_context *pipe = ctx->pipe;
 651    struct pipe_screen *screen = pipe->screen;
 652    struct pipe_surface *dstsurf;
 653    struct pipe_framebuffer_state fb_state;
 654    struct pipe_sampler_view viewTempl, *view;
 655    unsigned bind;
 656    boolean is_stencil, is_depth;
 657
 658    /* Give up if textures are not set. */
 659    assert(dst && src);
 660    if (!dst || !src)
 661       return;
 662
 663    /* Sanity checks. */
 664    if (dst == src) {
 665       assert(!is_overlap(srcx, srcx + width, srcy, srcy + height,
 666                          dstx, dstx + width, dsty, dsty + height));
 667    } else {
 668       assert(dst->format == src->format);
 669    }
 670    assert(src->target < PIPE_MAX_TEXTURE_TYPES);
 671
 672    /* Is this a ZS format? */
 673    is_depth = util_format_get_component_bits(src->format, UTIL_FORMAT_COLORSPACE_ZS, 0) != 0;
 674    is_stencil = util_format_get_component_bits(src->format, UTIL_FORMAT_COLORSPACE_ZS, 1) != 0;
 675
 676    if (is_depth || is_stencil)
 677       bind = PIPE_BIND_DEPTH_STENCIL;
 678    else
 679       bind = PIPE_BIND_RENDER_TARGET;
 680
 681    /* Check if we can sample from and render to the surfaces. */
 682    /* (assuming copying a stencil buffer is not possible) */
 683     if ((!ignore_stencil && is_stencil) ||
 684        !screen->is_format_supported(screen, dst->format, dst->target,
 685                                     dst->nr_samples, bind, 0) ||
 686        !screen->is_format_supported(screen, src->format, src->target,
 687                                     src->nr_samples, PIPE_BIND_SAMPLER_VIEW, 0)) {
 688       util_resource_copy_region(pipe, dst, subdst, dstx, dsty, dstz,
 689                                 src, subsrc, srcx, srcy, srcz, width, height);
 690       return;
 691    }
 692
 693    /* Get surfaces. */
 694    dstsurf = screen->get_tex_surface(screen, dst,
 695                                      subdst.face, subdst.level, dstz,
 696                                      bind);
 697
 698    /* Check whether the states are properly saved. */
 699    blitter_check_saved_CSOs(ctx);
 700    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 701    assert(blitter->saved_num_sampler_views != ~0);
 702    assert(blitter->saved_num_sampler_states != ~0);
 703
 704    /* Initialize framebuffer state. */
 705    fb_state.width = dstsurf->width;
 706    fb_state.height = dstsurf->height;
 707
 708    if (is_depth) {
 709       pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 710       pipe->bind_depth_stencil_alpha_state(pipe,
 711                                            ctx->dsa_write_depth_keep_stencil);
 712       pipe->bind_fs_state(pipe,
 713                           blitter_get_fs_texfetch_depth(ctx, src->target));
 714
 715       fb_state.nr_cbufs = 0;
 716       fb_state.zsbuf = dstsurf;
 717    } else {
 718       pipe->bind_blend_state(pipe, ctx->blend_write_color);
 719       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 720       pipe->bind_fs_state(pipe,
 721                           blitter_get_fs_texfetch_col(ctx, src->target));
 722
 723       fb_state.nr_cbufs = 1;
 724       fb_state.cbufs[0] = dstsurf;
 725       fb_state.zsbuf = 0;
 726    }
 727
 728    /* Initialize sampler view. */
 729    u_sampler_view_default_template(&viewTempl, src, src->format);
 730    view = pipe->create_sampler_view(pipe, src, &viewTempl);
 731
 732    if (ctx->sampler_view) {
 733       pipe_sampler_view_reference(&ctx->sampler_view, NULL);
 734    }
 735    ctx->sampler_view = view;
 736
 737    /* Set rasterizer state, shaders, and textures. */
 738    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 739    pipe->bind_vs_state(pipe, ctx->vs_tex);
 740    pipe->bind_fragment_sampler_states(pipe, 1,
 741                                       blitter_get_sampler_state(ctx, subsrc.level));
 742    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 743    pipe->set_fragment_sampler_views(pipe, 1, &view);
 744    pipe->set_framebuffer_state(pipe, &fb_state);
 745
 746    /* Set texture coordinates. */
 747    switch (src->target) {
 748       case PIPE_TEXTURE_1D:
 749       case PIPE_TEXTURE_2D:
 750          blitter_set_texcoords_2d(ctx, src, subsrc,
 751                                   srcx, srcy, srcx+width, srcy+height);
 752          break;
 753       case PIPE_TEXTURE_3D:
 754          blitter_set_texcoords_3d(ctx, src, subsrc, srcz,
 755                                   srcx, srcy, srcx+width, srcy+height);
 756          break;
 757       case PIPE_TEXTURE_CUBE:
 758          blitter_set_texcoords_cube(ctx, src, subsrc,
 759                                     srcx, srcy, srcx+width, srcy+height);
 760          break;
 761       default:
 762          assert(0);
 763          return;
 764    }
 765
 766    blitter_set_rectangle(ctx, dstx, dsty, dstx+width, dsty+height,
 767                          dstsurf->width, dstsurf->height, 0);
 768    blitter_draw_quad(ctx);
 769    blitter_restore_CSOs(ctx);
 770
 771    pipe_surface_reference(&dstsurf, NULL);
 772 }
 773
 774 /* Clear a region of a color surface to a constant value. */
 775 void util_blitter_clear_render_target(struct blitter_context *blitter,
 776                                       struct pipe_surface *dstsurf,
 777                                       const float *rgba,
 778                                       unsigned dstx, unsigned dsty,
 779                                       unsigned width, unsigned height)
 780 {
 781    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 782    struct pipe_context *pipe = ctx->pipe;
 783    struct pipe_framebuffer_state fb_state;
 784
 785    assert(dstsurf->texture);
 786    if (!dstsurf->texture)
 787       return;
 788
 789    /* check the saved state */
 790    blitter_check_saved_CSOs(ctx);
 791    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 792
 793    /* bind CSOs */
 794    pipe->bind_blend_state(pipe, ctx->blend_write_color);
 795    pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 796    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 797    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 1));
 798    pipe->bind_vs_state(pipe, ctx->vs_col);
 799    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 800
 801    /* set a framebuffer state */
 802    fb_state.width = dstsurf->width;
 803    fb_state.height = dstsurf->height;
 804    fb_state.nr_cbufs = 1;
 805    fb_state.cbufs[0] = dstsurf;
 806    fb_state.zsbuf = 0;
 807    pipe->set_framebuffer_state(pipe, &fb_state);
 808
 809    blitter_set_clear_color(ctx, rgba);
 810    blitter_set_rectangle(ctx, 0, 0, width, height, dstsurf->width, dstsurf->height, 0);
 811    blitter_draw_quad(ctx);
 812    blitter_restore_CSOs(ctx);
 813 }
 814
 815 /* Clear a region of a depth stencil surface. */
 816 void util_blitter_clear_depth_stencil(struct blitter_context *blitter,
 817                                       struct pipe_surface *dstsurf,
 818                                       unsigned clear_flags,
 819                                       double depth,
 820                                       unsigned stencil,
 821                                       unsigned dstx, unsigned dsty,
 822                                       unsigned width, unsigned height)
 823 {
 824    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
 825    struct pipe_context *pipe = ctx->pipe;
 826    struct pipe_framebuffer_state fb_state;
 827    struct pipe_stencil_ref sr = { { 0 } };
 828
 829    assert(dstsurf->texture);
 830    if (!dstsurf->texture)
 831       return;
 832
 833    /* check the saved state */
 834    blitter_check_saved_CSOs(ctx);
 835    assert(blitter->saved_fb_state.nr_cbufs != ~0);
 836
 837    /* bind CSOs */
 838    pipe->bind_blend_state(pipe, ctx->blend_keep_color);
 839    if ((clear_flags & PIPE_CLEAR_DEPTHSTENCIL) == PIPE_CLEAR_DEPTHSTENCIL) {
 840       sr.ref_value[0] = stencil & 0xff;
 841       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_write_depth_stencil);
 842       pipe->set_stencil_ref(pipe, &sr);
 843    }
 844    else if (clear_flags & PIPE_CLEAR_DEPTH) {
 845       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_write_depth_keep_stencil);
 846    }
 847    else if (clear_flags & PIPE_CLEAR_STENCIL) {
 848       sr.ref_value[0] = stencil & 0xff;
 849       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_write_stencil);
 850       pipe->set_stencil_ref(pipe, &sr);
 851    }
 852    else
 853       /* hmm that should be illegal probably, or make it a no-op somewhere */
 854       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 855
 856    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
 857    pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 0));
 858    pipe->bind_vs_state(pipe, ctx->vs_col);
 859    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
 860
 861    /* set a framebuffer state */
 862    fb_state.width = dstsurf->width;
 863    fb_state.height = dstsurf->height;
 864    fb_state.nr_cbufs = 0;
 865    fb_state.cbufs[0] = 0;
 866    fb_state.zsbuf = dstsurf;
 867    pipe->set_framebuffer_state(pipe, &fb_state);
 868
 869    blitter_set_rectangle(ctx, 0, 0, width, height, dstsurf->width, dstsurf->height, depth);
 870    blitter_draw_quad(ctx);
 871    blitter_restore_CSOs(ctx);
 872 }