src/gallium/auxiliary/util/u_blit.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * @file
  30  * Copy/blit pixel rect between surfaces
  31  *
  32  * @author Brian Paul
  33  */
  34
  35
  36 #include "pipe/p_context.h"
  37 #include "util/u_debug.h"
  38 #include "pipe/p_defines.h"
  39 #include "pipe/p_inlines.h"
  40 #include "pipe/p_shader_tokens.h"
  41 #include "pipe/p_state.h"
  42
  43 #include "util/u_blit.h"
  44 #include "util/u_draw_quad.h"
  45 #include "util/u_format.h"
  46 #include "util/u_math.h"
  47 #include "util/u_memory.h"
  48 #include "util/u_simple_shaders.h"
  49 #include "util/u_surface.h"
  50 #include "util/u_rect.h"
  51
  52 #include "cso_cache/cso_context.h"
  53
  54
  55 struct blit_state
  56 {
  57    struct pipe_context *pipe;
  58    struct cso_context *cso;
  59
  60    struct pipe_blend_state blend;
  61    struct pipe_depth_stencil_alpha_state depthstencil;
  62    struct pipe_rasterizer_state rasterizer;
  63    struct pipe_sampler_state sampler;
  64    struct pipe_viewport_state viewport;
  65
  66    void *vs;
  67    void *fs[TGSI_WRITEMASK_XYZW + 1];
  68
  69    struct pipe_buffer *vbuf;  /**< quad vertices */
  70    unsigned vbuf_slot;
  71
  72    float vertices[4][2][4];   /**< vertex/texcoords for quad */
  73 };
  74
  75
  76 /**
  77  * Create state object for blit.
  78  * Intended to be created once and re-used for many blit() calls.
  79  */
  80 struct blit_state *
  81 util_create_blit(struct pipe_context *pipe, struct cso_context *cso)
  82 {
  83    struct blit_state *ctx;
  84    uint i;
  85
  86    ctx = CALLOC_STRUCT(blit_state);
  87    if (!ctx)
  88       return NULL;
  89
  90    ctx->pipe = pipe;
  91    ctx->cso = cso;
  92
  93    /* disabled blending/masking */
  94    memset(&ctx->blend, 0, sizeof(ctx->blend));
  95    ctx->blend.colormask = PIPE_MASK_RGBA;
  96
  97    /* no-op depth/stencil/alpha */
  98    memset(&ctx->depthstencil, 0, sizeof(ctx->depthstencil));
  99
 100    /* rasterizer */
 101    memset(&ctx->rasterizer, 0, sizeof(ctx->rasterizer));
 102    ctx->rasterizer.front_winding = PIPE_WINDING_CW;
 103    ctx->rasterizer.cull_mode = PIPE_WINDING_NONE;
 104    ctx->rasterizer.bypass_vs_clip_and_viewport = 1;
 105    ctx->rasterizer.gl_rasterization_rules = 1;
 106
 107    /* samplers */
 108    memset(&ctx->sampler, 0, sizeof(ctx->sampler));
 109    ctx->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 110    ctx->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 111    ctx->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 112    ctx->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 113    ctx->sampler.min_img_filter = 0; /* set later */
 114    ctx->sampler.mag_img_filter = 0; /* set later */
 115    ctx->sampler.normalized_coords = 1;
 116
 117
 118    /* vertex shader - still required to provide the linkage between
 119     * fragment shader input semantics and vertex_element/buffers.
 120     */
 121    {
 122       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 123                                       TGSI_SEMANTIC_GENERIC };
 124       const uint semantic_indexes[] = { 0, 0 };
 125       ctx->vs = util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 126                                                     semantic_indexes);
 127    }
 128
 129    /* fragment shader */
 130    ctx->fs[TGSI_WRITEMASK_XYZW] =
 131       util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D);
 132    ctx->vbuf = NULL;
 133
 134    /* init vertex data that doesn't change */
 135    for (i = 0; i < 4; i++) {
 136       ctx->vertices[i][0][3] = 1.0f; /* w */
 137       ctx->vertices[i][1][2] = 0.0f; /* r */
 138       ctx->vertices[i][1][3] = 1.0f; /* q */
 139    }
 140
 141    return ctx;
 142 }
 143
 144
 145 /**
 146  * Destroy a blit context
 147  */
 148 void
 149 util_destroy_blit(struct blit_state *ctx)
 150 {
 151    struct pipe_context *pipe = ctx->pipe;
 152    unsigned i;
 153
 154    pipe->delete_vs_state(pipe, ctx->vs);
 155
 156    for (i = 0; i < Elements(ctx->fs); i++)
 157       if (ctx->fs[i])
 158          pipe->delete_fs_state(pipe, ctx->fs[i]);
 159
 160    pipe_buffer_reference(&ctx->vbuf, NULL);
 161
 162    FREE(ctx);
 163 }
 164
 165
 166 /**
 167  * Get offset of next free slot in vertex buffer for quad vertices.
 168  */
 169 static unsigned
 170 get_next_slot( struct blit_state *ctx )
 171 {
 172    const unsigned max_slots = 4096 / sizeof ctx->vertices;
 173
 174    if (ctx->vbuf_slot >= max_slots)
 175       util_blit_flush( ctx );
 176
 177    if (!ctx->vbuf) {
 178       ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
 179                                      32,
 180                                      PIPE_BUFFER_USAGE_VERTEX,
 181                                      max_slots * sizeof ctx->vertices);
 182    }
 183
 184    return ctx->vbuf_slot++ * sizeof ctx->vertices;
 185 }
 186
 187
 188
 189
 190
 191 /**
 192  * Setup vertex data for the textured quad we'll draw.
 193  * Note: y=0=top
 194  */
 195 static unsigned
 196 setup_vertex_data_tex(struct blit_state *ctx,
 197                       float x0, float y0, float x1, float y1,
 198                       float s0, float t0, float s1, float t1,
 199                       float z)
 200 {
 201    unsigned offset;
 202
 203    ctx->vertices[0][0][0] = x0;
 204    ctx->vertices[0][0][1] = y0;
 205    ctx->vertices[0][0][2] = z;
 206    ctx->vertices[0][1][0] = s0; /*s*/
 207    ctx->vertices[0][1][1] = t0; /*t*/
 208
 209    ctx->vertices[1][0][0] = x1;
 210    ctx->vertices[1][0][1] = y0;
 211    ctx->vertices[1][0][2] = z;
 212    ctx->vertices[1][1][0] = s1; /*s*/
 213    ctx->vertices[1][1][1] = t0; /*t*/
 214
 215    ctx->vertices[2][0][0] = x1;
 216    ctx->vertices[2][0][1] = y1;
 217    ctx->vertices[2][0][2] = z;
 218    ctx->vertices[2][1][0] = s1;
 219    ctx->vertices[2][1][1] = t1;
 220
 221    ctx->vertices[3][0][0] = x0;
 222    ctx->vertices[3][0][1] = y1;
 223    ctx->vertices[3][0][2] = z;
 224    ctx->vertices[3][1][0] = s0;
 225    ctx->vertices[3][1][1] = t1;
 226
 227    offset = get_next_slot( ctx );
 228
 229    pipe_buffer_write(ctx->pipe->screen, ctx->vbuf,
 230                      offset, sizeof(ctx->vertices), ctx->vertices);
 231
 232    return offset;
 233 }
 234
 235
 236 /**
 237  * \return TRUE if two regions overlap, FALSE otherwise
 238  */
 239 static boolean
 240 regions_overlap(int srcX0, int srcY0,
 241                 int srcX1, int srcY1,
 242                 int dstX0, int dstY0,
 243                 int dstX1, int dstY1)
 244 {
 245    if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1))
 246       return FALSE; /* src completely left of dst */
 247
 248    if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))
 249       return FALSE; /* dst completely left of src */
 250
 251    if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))
 252       return FALSE; /* src completely above dst */
 253
 254    if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))
 255       return FALSE; /* dst completely above src */
 256
 257    return TRUE; /* some overlap */
 258 }
 259
 260
 261 /**
 262  * Copy pixel block from src surface to dst surface.
 263  * Overlapping regions are acceptable.
 264  * Flipping and stretching are supported.
 265  * XXX what about clipping???
 266  * XXX need some control over blitting Z and/or stencil.
 267  */
 268 void
 269 util_blit_pixels_writemask(struct blit_state *ctx,
 270                            struct pipe_surface *src,
 271                            int srcX0, int srcY0,
 272                            int srcX1, int srcY1,
 273                            struct pipe_surface *dst,
 274                            int dstX0, int dstY0,
 275                            int dstX1, int dstY1,
 276                            float z, uint filter,
 277                            uint writemask)
 278 {
 279    struct pipe_context *pipe = ctx->pipe;
 280    struct pipe_screen *screen = pipe->screen;
 281    struct pipe_texture *tex = NULL;
 282    struct pipe_framebuffer_state fb;
 283    const int srcW = abs(srcX1 - srcX0);
 284    const int srcH = abs(srcY1 - srcY0);
 285    unsigned offset;
 286    boolean overlap;
 287    float s0, t0, s1, t1;
 288
 289    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 290           filter == PIPE_TEX_MIPFILTER_LINEAR);
 291
 292    assert(screen->is_format_supported(screen, src->format, PIPE_TEXTURE_2D,
 293                                       PIPE_TEXTURE_USAGE_SAMPLER, 0));
 294    assert(screen->is_format_supported(screen, dst->format, PIPE_TEXTURE_2D,
 295                                       PIPE_TEXTURE_USAGE_RENDER_TARGET, 0));
 296
 297    /* do the regions overlap? */
 298    overlap = util_same_surface(src, dst) &&
 299       regions_overlap(srcX0, srcY0, srcX1, srcY1,
 300                       dstX0, dstY0, dstX1, dstY1);
 301
 302    /*
 303     * Check for simple case:  no format conversion, no flipping, no stretching,
 304     * no overlapping.
 305     * Filter mode should not matter since there's no stretching.
 306     */
 307    if (pipe->surface_copy &&
 308        dst->format == src->format &&
 309        srcX0 < srcX1 &&
 310        dstX0 < dstX1 &&
 311        srcY0 < srcY1 &&
 312        dstY0 < dstY1 &&
 313        (dstX1 - dstX0) == (srcX1 - srcX0) &&
 314        (dstY1 - dstY0) == (srcY1 - srcY0) &&
 315        !overlap) {
 316       pipe->surface_copy(pipe,
 317                          dst, dstX0, dstY0, /* dest */
 318                          src, srcX0, srcY0, /* src */
 319                          srcW, srcH);       /* size */
 320       return;
 321    }
 322
 323    assert(screen->is_format_supported(screen, dst->format, PIPE_TEXTURE_2D,
 324                                       PIPE_TEXTURE_USAGE_RENDER_TARGET, 0));
 325
 326    /* Create a temporary texture when src and dest alias or when src
 327     * is anything other than a single-level 2d texture.
 328     *
 329     * This can still be improved upon.
 330     */
 331    if (util_same_surface(src, dst) ||
 332        src->texture->target != PIPE_TEXTURE_2D ||
 333        src->texture->last_level != 0)
 334    {
 335       struct pipe_texture texTemp;
 336       struct pipe_surface *texSurf;
 337       const int srcLeft = MIN2(srcX0, srcX1);
 338       const int srcTop = MIN2(srcY0, srcY1);
 339
 340       if (srcLeft != srcX0) {
 341          /* left-right flip */
 342          int tmp = dstX0;
 343          dstX0 = dstX1;
 344          dstX1 = tmp;
 345       }
 346
 347       if (srcTop != srcY0) {
 348          /* up-down flip */
 349          int tmp = dstY0;
 350          dstY0 = dstY1;
 351          dstY1 = tmp;
 352       }
 353
 354       /* create temp texture */
 355       memset(&texTemp, 0, sizeof(texTemp));
 356       texTemp.target = PIPE_TEXTURE_2D;
 357       texTemp.format = src->format;
 358       texTemp.last_level = 0;
 359       texTemp.width0 = srcW;
 360       texTemp.height0 = srcH;
 361       texTemp.depth0 = 1;
 362
 363       tex = screen->texture_create(screen, &texTemp);
 364       if (!tex)
 365          return;
 366
 367       texSurf = screen->get_tex_surface(screen, tex, 0, 0, 0,
 368                                         PIPE_BUFFER_USAGE_GPU_WRITE);
 369
 370       /* load temp texture */
 371       if (pipe->surface_copy) {
 372          pipe->surface_copy(pipe,
 373                             texSurf, 0, 0,   /* dest */
 374                             src, srcLeft, srcTop, /* src */
 375                             srcW, srcH);     /* size */
 376       } else {
 377          util_surface_copy(pipe, FALSE,
 378                            texSurf, 0, 0,   /* dest */
 379                            src, srcLeft, srcTop, /* src */
 380                            srcW, srcH);     /* size */
 381       }
 382
 383       /* free the surface, update the texture if necessary.
 384        */
 385       pipe_surface_reference(&texSurf, NULL);
 386       s0 = 0.0f;
 387       s1 = 1.0f;
 388       t0 = 0.0f;
 389       t1 = 1.0f;
 390    }
 391    else {
 392       pipe_texture_reference(&tex, src->texture);
 393       s0 = srcX0 / (float)tex->width0;
 394       s1 = srcX1 / (float)tex->width0;
 395       t0 = srcY0 / (float)tex->height0;
 396       t1 = srcY1 / (float)tex->height0;
 397    }
 398
 399
 400    /* save state (restored below) */
 401    cso_save_blend(ctx->cso);
 402    cso_save_depth_stencil_alpha(ctx->cso);
 403    cso_save_rasterizer(ctx->cso);
 404    cso_save_samplers(ctx->cso);
 405    cso_save_sampler_textures(ctx->cso);
 406    cso_save_framebuffer(ctx->cso);
 407    cso_save_fragment_shader(ctx->cso);
 408    cso_save_vertex_shader(ctx->cso);
 409
 410    /* set misc state we care about */
 411    cso_set_blend(ctx->cso, &ctx->blend);
 412    cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil);
 413    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 414
 415    /* sampler */
 416    ctx->sampler.min_img_filter = filter;
 417    ctx->sampler.mag_img_filter = filter;
 418    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 419    cso_single_sampler_done(ctx->cso);
 420
 421    /* texture */
 422    cso_set_sampler_textures(ctx->cso, 1, &tex);
 423
 424    if (ctx->fs[writemask] == NULL)
 425       ctx->fs[writemask] =
 426          util_make_fragment_tex_shader_writemask(pipe, TGSI_TEXTURE_2D,
 427                                                  writemask);
 428
 429    /* shaders */
 430    cso_set_fragment_shader_handle(ctx->cso, ctx->fs[writemask]);
 431    cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
 432
 433    /* drawing dest */
 434    memset(&fb, 0, sizeof(fb));
 435    fb.width = dst->width;
 436    fb.height = dst->height;
 437    fb.nr_cbufs = 1;
 438    fb.cbufs[0] = dst;
 439    cso_set_framebuffer(ctx->cso, &fb);
 440
 441    /* draw quad */
 442    offset = setup_vertex_data_tex(ctx,
 443                                   (float) dstX0, (float) dstY0,
 444                                   (float) dstX1, (float) dstY1,
 445                                   s0, t0,
 446                                   s1, t1,
 447                                   z);
 448
 449    util_draw_vertex_buffer(ctx->pipe, ctx->vbuf, offset,
 450                            PIPE_PRIM_TRIANGLE_FAN,
 451                            4,  /* verts */
 452                            2); /* attribs/vert */
 453
 454    /* restore state we changed */
 455    cso_restore_blend(ctx->cso);
 456    cso_restore_depth_stencil_alpha(ctx->cso);
 457    cso_restore_rasterizer(ctx->cso);
 458    cso_restore_samplers(ctx->cso);
 459    cso_restore_sampler_textures(ctx->cso);
 460    cso_restore_framebuffer(ctx->cso);
 461    cso_restore_fragment_shader(ctx->cso);
 462    cso_restore_vertex_shader(ctx->cso);
 463
 464    pipe_texture_reference(&tex, NULL);
 465 }
 466
 467
 468 void
 469 util_blit_pixels(struct blit_state *ctx,
 470                  struct pipe_surface *src,
 471                  int srcX0, int srcY0,
 472                  int srcX1, int srcY1,
 473                  struct pipe_surface *dst,
 474                  int dstX0, int dstY0,
 475                  int dstX1, int dstY1,
 476                  float z, uint filter )
 477 {
 478    util_blit_pixels_writemask( ctx, src,
 479                                srcX0, srcY0,
 480                                srcX1, srcY1,
 481                                dst,
 482                                dstX0, dstY0,
 483                                dstX1, dstY1,
 484                                z, filter,
 485                                TGSI_WRITEMASK_XYZW );
 486 }
 487
 488
 489 /* Release vertex buffer at end of frame to avoid synchronous
 490  * rendering.
 491  */
 492 void util_blit_flush( struct blit_state *ctx )
 493 {
 494    pipe_buffer_reference(&ctx->vbuf, NULL);
 495    ctx->vbuf_slot = 0;
 496 }
 497
 498
 499
 500 /**
 501  * Copy pixel block from src texture to dst surface.
 502  * Overlapping regions are acceptable.
 503  *
 504  * XXX Should support selection of level.
 505  * XXX need some control over blitting Z and/or stencil.
 506  */
 507 void
 508 util_blit_pixels_tex(struct blit_state *ctx,
 509                  struct pipe_texture *tex,
 510                  int srcX0, int srcY0,
 511                  int srcX1, int srcY1,
 512                  struct pipe_surface *dst,
 513                  int dstX0, int dstY0,
 514                  int dstX1, int dstY1,
 515                  float z, uint filter)
 516 {
 517    struct pipe_framebuffer_state fb;
 518    float s0, t0, s1, t1;
 519    unsigned offset;
 520
 521    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 522           filter == PIPE_TEX_MIPFILTER_LINEAR);
 523
 524    assert(tex->width0 != 0);
 525    assert(tex->height0 != 0);
 526
 527    s0 = srcX0 / (float)tex->width0;
 528    s1 = srcX1 / (float)tex->width0;
 529    t0 = srcY0 / (float)tex->height0;
 530    t1 = srcY1 / (float)tex->height0;
 531
 532    assert(ctx->pipe->screen->is_format_supported(ctx->pipe->screen, dst->format,
 533                                                  PIPE_TEXTURE_2D,
 534                                                  PIPE_TEXTURE_USAGE_RENDER_TARGET,
 535                                                  0));
 536
 537    /* save state (restored below) */
 538    cso_save_blend(ctx->cso);
 539    cso_save_depth_stencil_alpha(ctx->cso);
 540    cso_save_rasterizer(ctx->cso);
 541    cso_save_samplers(ctx->cso);
 542    cso_save_sampler_textures(ctx->cso);
 543    cso_save_framebuffer(ctx->cso);
 544    cso_save_fragment_shader(ctx->cso);
 545    cso_save_vertex_shader(ctx->cso);
 546
 547    /* set misc state we care about */
 548    cso_set_blend(ctx->cso, &ctx->blend);
 549    cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil);
 550    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 551
 552    /* sampler */
 553    ctx->sampler.min_img_filter = filter;
 554    ctx->sampler.mag_img_filter = filter;
 555    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 556    cso_single_sampler_done(ctx->cso);
 557
 558    /* texture */
 559    cso_set_sampler_textures(ctx->cso, 1, &tex);
 560
 561    /* shaders */
 562    cso_set_fragment_shader_handle(ctx->cso, ctx->fs[TGSI_WRITEMASK_XYZW]);
 563    cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
 564
 565    /* drawing dest */
 566    memset(&fb, 0, sizeof(fb));
 567    fb.width = dst->width;
 568    fb.height = dst->height;
 569    fb.nr_cbufs = 1;
 570    fb.cbufs[0] = dst;
 571    cso_set_framebuffer(ctx->cso, &fb);
 572
 573    /* draw quad */
 574    offset = setup_vertex_data_tex(ctx,
 575                                   (float) dstX0, (float) dstY0,
 576                                   (float) dstX1, (float) dstY1,
 577                                   s0, t0, s1, t1,
 578                                   z);
 579
 580    util_draw_vertex_buffer(ctx->pipe,
 581                            ctx->vbuf, offset,
 582                            PIPE_PRIM_TRIANGLE_FAN,
 583                            4,  /* verts */
 584                            2); /* attribs/vert */
 585
 586    /* restore state we changed */
 587    cso_restore_blend(ctx->cso);
 588    cso_restore_depth_stencil_alpha(ctx->cso);
 589    cso_restore_rasterizer(ctx->cso);
 590    cso_restore_samplers(ctx->cso);
 591    cso_restore_sampler_textures(ctx->cso);
 592    cso_restore_framebuffer(ctx->cso);
 593    cso_restore_fragment_shader(ctx->cso);
 594    cso_restore_vertex_shader(ctx->cso);
 595 }