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 "util/u_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_sampler.h"
  49 #include "util/u_simple_shaders.h"
  50
  51 #include "cso_cache/cso_context.h"
  52
  53
  54 struct blit_state
  55 {
  56    struct pipe_context *pipe;
  57    struct cso_context *cso;
  58
  59    struct pipe_blend_state blend;
  60    struct pipe_depth_stencil_alpha_state depthstencil_keep;
  61    struct pipe_depth_stencil_alpha_state depthstencil_write;
  62    struct pipe_rasterizer_state rasterizer;
  63    struct pipe_sampler_state sampler;
  64    struct pipe_viewport_state viewport;
  65    struct pipe_clip_state clip;
  66    struct pipe_vertex_element velem[2];
  67    enum pipe_texture_target internal_target;
  68
  69    void *vs;
  70    void *fs[TGSI_WRITEMASK_XYZW + 1];
  71    void *fs_depth;
  72
  73    struct pipe_resource *vbuf;  /**< quad vertices */
  74    unsigned vbuf_slot;
  75
  76    float vertices[4][2][4];   /**< vertex/texcoords for quad */
  77 };
  78
  79
  80 /**
  81  * Create state object for blit.
  82  * Intended to be created once and re-used for many blit() calls.
  83  */
  84 struct blit_state *
  85 util_create_blit(struct pipe_context *pipe, struct cso_context *cso)
  86 {
  87    struct blit_state *ctx;
  88    uint i;
  89
  90    ctx = CALLOC_STRUCT(blit_state);
  91    if (!ctx)
  92       return NULL;
  93
  94    ctx->pipe = pipe;
  95    ctx->cso = cso;
  96
  97    /* disabled blending/masking */
  98    memset(&ctx->blend, 0, sizeof(ctx->blend));
  99    ctx->blend.rt[0].colormask = PIPE_MASK_RGBA;
 100
 101    /* no-op depth/stencil/alpha */
 102    memset(&ctx->depthstencil_keep, 0, sizeof(ctx->depthstencil_keep));
 103    memset(&ctx->depthstencil_write, 0, sizeof(ctx->depthstencil_write));
 104    ctx->depthstencil_write.depth.enabled = 1;
 105    ctx->depthstencil_write.depth.writemask = 1;
 106    ctx->depthstencil_write.depth.func = PIPE_FUNC_ALWAYS;
 107
 108    /* rasterizer */
 109    memset(&ctx->rasterizer, 0, sizeof(ctx->rasterizer));
 110    ctx->rasterizer.cull_face = PIPE_FACE_NONE;
 111    ctx->rasterizer.gl_rasterization_rules = 1;
 112
 113    /* samplers */
 114    memset(&ctx->sampler, 0, sizeof(ctx->sampler));
 115    ctx->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 116    ctx->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 117    ctx->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 118    ctx->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 119    ctx->sampler.min_img_filter = 0; /* set later */
 120    ctx->sampler.mag_img_filter = 0; /* set later */
 121
 122    /* vertex elements state */
 123    memset(&ctx->velem[0], 0, sizeof(ctx->velem[0]) * 2);
 124    for (i = 0; i < 2; i++) {
 125       ctx->velem[i].src_offset = i * 4 * sizeof(float);
 126       ctx->velem[i].instance_divisor = 0;
 127       ctx->velem[i].vertex_buffer_index = 0;
 128       ctx->velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 129    }
 130
 131    /* vertex shader - still required to provide the linkage between
 132     * fragment shader input semantics and vertex_element/buffers.
 133     */
 134    {
 135       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 136                                       TGSI_SEMANTIC_GENERIC };
 137       const uint semantic_indexes[] = { 0, 0 };
 138       ctx->vs = util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 139                                                     semantic_indexes);
 140    }
 141
 142    /* fragment shader */
 143    ctx->fs[TGSI_WRITEMASK_XYZW] =
 144       util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D,
 145                                     TGSI_INTERPOLATE_LINEAR);
 146    ctx->vbuf = NULL;
 147
 148    /* init vertex data that doesn't change */
 149    for (i = 0; i < 4; i++) {
 150       ctx->vertices[i][0][3] = 1.0f; /* w */
 151       ctx->vertices[i][1][2] = 0.0f; /* r */
 152       ctx->vertices[i][1][3] = 1.0f; /* q */
 153    }
 154
 155    if(pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 156       ctx->internal_target = PIPE_TEXTURE_2D;
 157    else
 158       ctx->internal_target = PIPE_TEXTURE_RECT;
 159
 160    return ctx;
 161 }
 162
 163
 164 /**
 165  * Destroy a blit context
 166  */
 167 void
 168 util_destroy_blit(struct blit_state *ctx)
 169 {
 170    struct pipe_context *pipe = ctx->pipe;
 171    unsigned i;
 172
 173    pipe->delete_vs_state(pipe, ctx->vs);
 174
 175    for (i = 0; i < Elements(ctx->fs); i++)
 176       if (ctx->fs[i])
 177          pipe->delete_fs_state(pipe, ctx->fs[i]);
 178
 179    if (ctx->fs_depth)
 180       pipe->delete_fs_state(pipe, ctx->fs_depth);
 181
 182    pipe_resource_reference(&ctx->vbuf, NULL);
 183
 184    FREE(ctx);
 185 }
 186
 187
 188 /**
 189  * Get offset of next free slot in vertex buffer for quad vertices.
 190  */
 191 static unsigned
 192 get_next_slot( struct blit_state *ctx )
 193 {
 194    const unsigned max_slots = 4096 / sizeof ctx->vertices;
 195
 196    if (ctx->vbuf_slot >= max_slots)
 197       util_blit_flush( ctx );
 198
 199    if (!ctx->vbuf) {
 200       ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
 201                                      PIPE_BIND_VERTEX_BUFFER,
 202                                      max_slots * sizeof ctx->vertices);
 203    }
 204
 205    return ctx->vbuf_slot++ * sizeof ctx->vertices;
 206 }
 207
 208
 209
 210
 211 /**
 212  * Setup vertex data for the textured quad we'll draw.
 213  * Note: y=0=top
 214  */
 215 static unsigned
 216 setup_vertex_data_tex(struct blit_state *ctx,
 217                       float x0, float y0, float x1, float y1,
 218                       float s0, float t0, float s1, float t1,
 219                       float z)
 220 {
 221    unsigned offset;
 222
 223    ctx->vertices[0][0][0] = x0;
 224    ctx->vertices[0][0][1] = y0;
 225    ctx->vertices[0][0][2] = z;
 226    ctx->vertices[0][1][0] = s0; /*s*/
 227    ctx->vertices[0][1][1] = t0; /*t*/
 228
 229    ctx->vertices[1][0][0] = x1;
 230    ctx->vertices[1][0][1] = y0;
 231    ctx->vertices[1][0][2] = z;
 232    ctx->vertices[1][1][0] = s1; /*s*/
 233    ctx->vertices[1][1][1] = t0; /*t*/
 234
 235    ctx->vertices[2][0][0] = x1;
 236    ctx->vertices[2][0][1] = y1;
 237    ctx->vertices[2][0][2] = z;
 238    ctx->vertices[2][1][0] = s1;
 239    ctx->vertices[2][1][1] = t1;
 240
 241    ctx->vertices[3][0][0] = x0;
 242    ctx->vertices[3][0][1] = y1;
 243    ctx->vertices[3][0][2] = z;
 244    ctx->vertices[3][1][0] = s0;
 245    ctx->vertices[3][1][1] = t1;
 246
 247    offset = get_next_slot( ctx );
 248
 249    pipe_buffer_write_nooverlap(ctx->pipe, ctx->vbuf,
 250                                offset, sizeof(ctx->vertices), ctx->vertices);
 251
 252    return offset;
 253 }
 254
 255
 256 /**
 257  * \return TRUE if two regions overlap, FALSE otherwise
 258  */
 259 static boolean
 260 regions_overlap(int srcX0, int srcY0,
 261                 int srcX1, int srcY1,
 262                 int dstX0, int dstY0,
 263                 int dstX1, int dstY1)
 264 {
 265    if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1))
 266       return FALSE; /* src completely left of dst */
 267
 268    if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))
 269       return FALSE; /* dst completely left of src */
 270
 271    if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))
 272       return FALSE; /* src completely above dst */
 273
 274    if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))
 275       return FALSE; /* dst completely above src */
 276
 277    return TRUE; /* some overlap */
 278 }
 279
 280
 281 /**
 282  * Copy pixel block from src surface to dst surface.
 283  * Overlapping regions are acceptable.
 284  * Flipping and stretching are supported.
 285  * \param filter  one of PIPE_TEX_MIPFILTER_NEAREST/LINEAR
 286  * \param writemask  controls which channels in the dest surface are sourced
 287  *                   from the src surface.  Disabled channels are sourced
 288  *                   from (0,0,0,1).
 289  * XXX need some control over blitting stencil.
 290  */
 291 void
 292 util_blit_pixels_writemask(struct blit_state *ctx,
 293                            struct pipe_resource *src_tex,
 294                            struct pipe_subresource srcsub,
 295                            int srcX0, int srcY0,
 296                            int srcX1, int srcY1,
 297                            int srcZ0,
 298                            struct pipe_surface *dst,
 299                            int dstX0, int dstY0,
 300                            int dstX1, int dstY1,
 301                            float z, uint filter,
 302                            uint writemask)
 303 {
 304    struct pipe_context *pipe = ctx->pipe;
 305    struct pipe_screen *screen = pipe->screen;
 306    struct pipe_sampler_view *sampler_view = NULL;
 307    struct pipe_sampler_view sv_templ;
 308    struct pipe_framebuffer_state fb;
 309    const int srcW = abs(srcX1 - srcX0);
 310    const int srcH = abs(srcY1 - srcY0);
 311    unsigned offset;
 312    boolean overlap, dst_is_depth;
 313    float s0, t0, s1, t1;
 314    boolean normalized;
 315
 316    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 317           filter == PIPE_TEX_MIPFILTER_LINEAR);
 318
 319    assert(srcsub.level <= src_tex->last_level);
 320
 321    /* do the regions overlap? */
 322    overlap = src_tex == dst->texture &&
 323              dst->face == srcsub.face &&
 324              dst->level == srcsub.level &&
 325              dst->zslice == srcZ0 &&
 326       regions_overlap(srcX0, srcY0, srcX1, srcY1,
 327                       dstX0, dstY0, dstX1, dstY1);
 328
 329    /*
 330     * Check for simple case:  no format conversion, no flipping, no stretching,
 331     * no overlapping.
 332     * Filter mode should not matter since there's no stretching.
 333     */
 334    if (dst->format == src_tex->format &&
 335        srcX0 < srcX1 &&
 336        dstX0 < dstX1 &&
 337        srcY0 < srcY1 &&
 338        dstY0 < dstY1 &&
 339        (dstX1 - dstX0) == (srcX1 - srcX0) &&
 340        (dstY1 - dstY0) == (srcY1 - srcY0) &&
 341        !overlap) {
 342       struct pipe_subresource subdst;
 343       subdst.face = dst->face;
 344       subdst.level = dst->level;
 345       pipe->resource_copy_region(pipe,
 346                                  dst->texture, subdst,
 347                                  dstX0, dstY0, dst->zslice,/* dest */
 348                                  src_tex, srcsub,
 349                                  srcX0, srcY0, srcZ0,/* src */
 350                                  srcW, srcH);       /* size */
 351       return;
 352    }
 353
 354    /* Create a temporary texture when src and dest alias or when src
 355     * is anything other than a 2d texture.
 356     * XXX should just use appropriate shader to access 1d / 3d slice / cube face,
 357     * much like the u_blitter code does (should be pretty trivial).
 358     *
 359     * This can still be improved upon.
 360     */
 361    if ((src_tex == dst->texture &&
 362        dst->face == srcsub.face &&
 363        dst->level == srcsub.level &&
 364        dst->zslice == srcZ0) ||
 365        (src_tex->target != PIPE_TEXTURE_2D &&
 366        src_tex->target != PIPE_TEXTURE_RECT))
 367    {
 368       struct pipe_resource texTemp;
 369       struct pipe_resource *tex;
 370       struct pipe_sampler_view sv_templ;
 371       struct pipe_subresource texsub;
 372       const int srcLeft = MIN2(srcX0, srcX1);
 373       const int srcTop = MIN2(srcY0, srcY1);
 374
 375       if (srcLeft != srcX0) {
 376          /* left-right flip */
 377          int tmp = dstX0;
 378          dstX0 = dstX1;
 379          dstX1 = tmp;
 380       }
 381
 382       if (srcTop != srcY0) {
 383          /* up-down flip */
 384          int tmp = dstY0;
 385          dstY0 = dstY1;
 386          dstY1 = tmp;
 387       }
 388
 389       /* create temp texture */
 390       memset(&texTemp, 0, sizeof(texTemp));
 391       texTemp.target = ctx->internal_target;
 392       texTemp.format = src_tex->format;
 393       texTemp.last_level = 0;
 394       texTemp.width0 = srcW;
 395       texTemp.height0 = srcH;
 396       texTemp.depth0 = 1;
 397       texTemp.bind = PIPE_BIND_SAMPLER_VIEW;
 398
 399       tex = screen->resource_create(screen, &texTemp);
 400       if (!tex)
 401          return;
 402
 403       texsub.face = 0;
 404       texsub.level = 0;
 405       /* load temp texture */
 406       pipe->resource_copy_region(pipe,
 407                                  tex, texsub, 0, 0, 0,  /* dest */
 408                                  src_tex, srcsub, srcLeft, srcTop, srcZ0, /* src */
 409                                  srcW, srcH);     /* size */
 410
 411       normalized = tex->target != PIPE_TEXTURE_RECT;
 412       if(normalized) {
 413          s0 = 0.0f;
 414          s1 = 1.0f;
 415          t0 = 0.0f;
 416          t1 = 1.0f;
 417       }
 418       else {
 419          s0 = 0;
 420          s1 = srcW;
 421          t0 = 0;
 422          t1 = srcH;
 423       }
 424
 425       u_sampler_view_default_template(&sv_templ, tex, tex->format);
 426       sampler_view = pipe->create_sampler_view(pipe, tex, &sv_templ);
 427
 428       if (!sampler_view) {
 429          pipe_resource_reference(&tex, NULL);
 430          return;
 431       }
 432       pipe_resource_reference(&tex, NULL);
 433    }
 434    else {
 435       u_sampler_view_default_template(&sv_templ, src_tex, src_tex->format);
 436       sv_templ.first_level = sv_templ.last_level = srcsub.level;
 437       sampler_view = pipe->create_sampler_view(pipe, src_tex, &sv_templ);
 438
 439       if (!sampler_view) {
 440          return;
 441       }
 442
 443       s0 = srcX0;
 444       s1 = srcX1;
 445       t0 = srcY0;
 446       t1 = srcY1;
 447       normalized = sampler_view->texture->target != PIPE_TEXTURE_RECT;
 448       if(normalized)
 449       {
 450          s0 /= (float)(u_minify(sampler_view->texture->width0, srcsub.level));
 451          s1 /= (float)(u_minify(sampler_view->texture->width0, srcsub.level));
 452          t0 /= (float)(u_minify(sampler_view->texture->height0, srcsub.level));
 453          t1 /= (float)(u_minify(sampler_view->texture->height0, srcsub.level));
 454       }
 455    }
 456
 457    dst_is_depth = util_format_is_depth_or_stencil(dst->format);
 458
 459    assert(screen->is_format_supported(screen, sampler_view->format, ctx->internal_target,
 460                                       sampler_view->texture->nr_samples,
 461                                       PIPE_BIND_SAMPLER_VIEW, 0));
 462    assert(screen->is_format_supported(screen, dst->format, ctx->internal_target,
 463                                       dst->texture->nr_samples,
 464                                       dst_is_depth ? PIPE_BIND_DEPTH_STENCIL :
 465                                                      PIPE_BIND_RENDER_TARGET, 0));
 466    /* save state (restored below) */
 467    cso_save_blend(ctx->cso);
 468    cso_save_depth_stencil_alpha(ctx->cso);
 469    cso_save_rasterizer(ctx->cso);
 470    cso_save_samplers(ctx->cso);
 471    cso_save_fragment_sampler_views(ctx->cso);
 472    cso_save_viewport(ctx->cso);
 473    cso_save_framebuffer(ctx->cso);
 474    cso_save_fragment_shader(ctx->cso);
 475    cso_save_vertex_shader(ctx->cso);
 476    cso_save_clip(ctx->cso);
 477    cso_save_vertex_elements(ctx->cso);
 478
 479    /* set misc state we care about */
 480    cso_set_blend(ctx->cso, &ctx->blend);
 481    cso_set_depth_stencil_alpha(ctx->cso,
 482                                dst_is_depth ? &ctx->depthstencil_write :
 483                                               &ctx->depthstencil_keep);
 484    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 485    cso_set_clip(ctx->cso, &ctx->clip);
 486    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
 487
 488    /* sampler */
 489    ctx->sampler.normalized_coords = normalized;
 490    ctx->sampler.min_img_filter = filter;
 491    ctx->sampler.mag_img_filter = filter;
 492    /* we've limited this already with the sampler view but you never know... */
 493    ctx->sampler.min_lod = srcsub.level;
 494    ctx->sampler.max_lod = srcsub.level;
 495    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 496    cso_single_sampler_done(ctx->cso);
 497
 498    /* viewport */
 499    ctx->viewport.scale[0] = 0.5f * dst->width;
 500    ctx->viewport.scale[1] = 0.5f * dst->height;
 501    ctx->viewport.scale[2] = 0.5f;
 502    ctx->viewport.scale[3] = 1.0f;
 503    ctx->viewport.translate[0] = 0.5f * dst->width;
 504    ctx->viewport.translate[1] = 0.5f * dst->height;
 505    ctx->viewport.translate[2] = 0.5f;
 506    ctx->viewport.translate[3] = 0.0f;
 507    cso_set_viewport(ctx->cso, &ctx->viewport);
 508
 509    /* texture */
 510    cso_set_fragment_sampler_views(ctx->cso, 1, &sampler_view);
 511
 512    /* shaders */
 513    if (dst_is_depth) {
 514       if (ctx->fs_depth == NULL)
 515          ctx->fs_depth =
 516             util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_2D,
 517                                                      TGSI_INTERPOLATE_LINEAR);
 518
 519       cso_set_fragment_shader_handle(ctx->cso, ctx->fs_depth);
 520    } else {
 521       if (ctx->fs[writemask] == NULL)
 522          ctx->fs[writemask] =
 523             util_make_fragment_tex_shader_writemask(pipe, TGSI_TEXTURE_2D,
 524                                                     TGSI_INTERPOLATE_LINEAR,
 525                                                     writemask);
 526
 527       cso_set_fragment_shader_handle(ctx->cso, ctx->fs[writemask]);
 528    }
 529    cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
 530
 531    /* drawing dest */
 532    memset(&fb, 0, sizeof(fb));
 533    fb.width = dst->width;
 534    fb.height = dst->height;
 535    if (dst_is_depth) {
 536       fb.zsbuf = dst;
 537    } else {
 538       fb.nr_cbufs = 1;
 539       fb.cbufs[0] = dst;
 540    }
 541    cso_set_framebuffer(ctx->cso, &fb);
 542
 543    /* draw quad */
 544    offset = setup_vertex_data_tex(ctx,
 545                                   (float) dstX0 / dst->width * 2.0f - 1.0f,
 546                                   (float) dstY0 / dst->height * 2.0f - 1.0f,
 547                                   (float) dstX1 / dst->width * 2.0f - 1.0f,
 548                                   (float) dstY1 / dst->height * 2.0f - 1.0f,
 549                                   s0, t0,
 550                                   s1, t1,
 551                                   z);
 552
 553    util_draw_vertex_buffer(ctx->pipe, ctx->vbuf, offset,
 554                            PIPE_PRIM_TRIANGLE_FAN,
 555                            4,  /* verts */
 556                            2); /* attribs/vert */
 557
 558    /* restore state we changed */
 559    cso_restore_blend(ctx->cso);
 560    cso_restore_depth_stencil_alpha(ctx->cso);
 561    cso_restore_rasterizer(ctx->cso);
 562    cso_restore_samplers(ctx->cso);
 563    cso_restore_fragment_sampler_views(ctx->cso);
 564    cso_restore_viewport(ctx->cso);
 565    cso_restore_framebuffer(ctx->cso);
 566    cso_restore_fragment_shader(ctx->cso);
 567    cso_restore_vertex_shader(ctx->cso);
 568    cso_restore_clip(ctx->cso);
 569    cso_restore_vertex_elements(ctx->cso);
 570
 571    pipe_sampler_view_reference(&sampler_view, NULL);
 572 }
 573
 574
 575 void
 576 util_blit_pixels(struct blit_state *ctx,
 577                  struct pipe_resource *src_tex,
 578                  struct pipe_subresource srcsub,
 579                  int srcX0, int srcY0,
 580                  int srcX1, int srcY1,
 581                  int srcZ,
 582                  struct pipe_surface *dst,
 583                  int dstX0, int dstY0,
 584                  int dstX1, int dstY1,
 585                  float z, uint filter )
 586 {
 587    util_blit_pixels_writemask( ctx, src_tex,
 588                                srcsub,
 589                                srcX0, srcY0,
 590                                srcX1, srcY1,
 591                                srcZ,
 592                                dst,
 593                                dstX0, dstY0,
 594                                dstX1, dstY1,
 595                                z, filter,
 596                                TGSI_WRITEMASK_XYZW );
 597 }
 598
 599
 600 /* Release vertex buffer at end of frame to avoid synchronous
 601  * rendering.
 602  */
 603 void util_blit_flush( struct blit_state *ctx )
 604 {
 605    pipe_resource_reference(&ctx->vbuf, NULL);
 606    ctx->vbuf_slot = 0;
 607 }
 608
 609
 610
 611 /**
 612  * Copy pixel block from src texture to dst surface.
 613  *
 614  * XXX Should support selection of level.
 615  * XXX need some control over blitting Z and/or stencil.
 616  */
 617 void
 618 util_blit_pixels_tex(struct blit_state *ctx,
 619                      struct pipe_sampler_view *src_sampler_view,
 620                      int srcX0, int srcY0,
 621                      int srcX1, int srcY1,
 622                      struct pipe_surface *dst,
 623                      int dstX0, int dstY0,
 624                      int dstX1, int dstY1,
 625                      float z, uint filter)
 626 {
 627    boolean normalized = src_sampler_view->texture->target != PIPE_TEXTURE_RECT;
 628    struct pipe_framebuffer_state fb;
 629    float s0, t0, s1, t1;
 630    unsigned offset;
 631    struct pipe_resource *tex = src_sampler_view->texture;
 632
 633    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 634           filter == PIPE_TEX_MIPFILTER_LINEAR);
 635
 636    assert(tex);
 637    assert(tex->width0 != 0);
 638    assert(tex->height0 != 0);
 639
 640    s0 = srcX0;
 641    s1 = srcX1;
 642    t0 = srcY0;
 643    t1 = srcY1;
 644
 645    if(normalized)
 646    {
 647       s0 /= (float)tex->width0;
 648       s1 /= (float)tex->width0;
 649       t0 /= (float)tex->height0;
 650       t1 /= (float)tex->height0;
 651    }
 652
 653    assert(ctx->pipe->screen->is_format_supported(ctx->pipe->screen, dst->format,
 654                                                  PIPE_TEXTURE_2D,
 655                                                  dst->texture->nr_samples,
 656                                                  PIPE_BIND_RENDER_TARGET,
 657                                                  0));
 658
 659    /* save state (restored below) */
 660    cso_save_blend(ctx->cso);
 661    cso_save_depth_stencil_alpha(ctx->cso);
 662    cso_save_rasterizer(ctx->cso);
 663    cso_save_samplers(ctx->cso);
 664    cso_save_fragment_sampler_views(ctx->cso);
 665    cso_save_framebuffer(ctx->cso);
 666    cso_save_fragment_shader(ctx->cso);
 667    cso_save_vertex_shader(ctx->cso);
 668    cso_save_clip(ctx->cso);
 669    cso_save_vertex_elements(ctx->cso);
 670
 671    /* set misc state we care about */
 672    cso_set_blend(ctx->cso, &ctx->blend);
 673    cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil_keep);
 674    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 675    cso_set_clip(ctx->cso, &ctx->clip);
 676    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
 677
 678    /* sampler */
 679    ctx->sampler.normalized_coords = normalized;
 680    ctx->sampler.min_img_filter = filter;
 681    ctx->sampler.mag_img_filter = filter;
 682    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 683    cso_single_sampler_done(ctx->cso);
 684
 685    /* viewport */
 686    ctx->viewport.scale[0] = 0.5f * dst->width;
 687    ctx->viewport.scale[1] = 0.5f * dst->height;
 688    ctx->viewport.scale[2] = 0.5f;
 689    ctx->viewport.scale[3] = 1.0f;
 690    ctx->viewport.translate[0] = 0.5f * dst->width;
 691    ctx->viewport.translate[1] = 0.5f * dst->height;
 692    ctx->viewport.translate[2] = 0.5f;
 693    ctx->viewport.translate[3] = 0.0f;
 694    cso_set_viewport(ctx->cso, &ctx->viewport);
 695
 696    /* texture */
 697    cso_set_fragment_sampler_views(ctx->cso, 1, &src_sampler_view);
 698
 699    /* shaders */
 700    cso_set_fragment_shader_handle(ctx->cso, ctx->fs[TGSI_WRITEMASK_XYZW]);
 701    cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
 702
 703    /* drawing dest */
 704    memset(&fb, 0, sizeof(fb));
 705    fb.width = dst->width;
 706    fb.height = dst->height;
 707    fb.nr_cbufs = 1;
 708    fb.cbufs[0] = dst;
 709    cso_set_framebuffer(ctx->cso, &fb);
 710
 711    /* draw quad */
 712    offset = setup_vertex_data_tex(ctx,
 713                                   (float) dstX0 / dst->width * 2.0f - 1.0f,
 714                                   (float) dstY0 / dst->height * 2.0f - 1.0f,
 715                                   (float) dstX1 / dst->width * 2.0f - 1.0f,
 716                                   (float) dstY1 / dst->height * 2.0f - 1.0f,
 717                                   s0, t0, s1, t1,
 718                                   z);
 719
 720    util_draw_vertex_buffer(ctx->pipe,
 721                            ctx->vbuf, offset,
 722                            PIPE_PRIM_TRIANGLE_FAN,
 723                            4,  /* verts */
 724                            2); /* attribs/vert */
 725
 726    /* restore state we changed */
 727    cso_restore_blend(ctx->cso);
 728    cso_restore_depth_stencil_alpha(ctx->cso);
 729    cso_restore_rasterizer(ctx->cso);
 730    cso_restore_samplers(ctx->cso);
 731    cso_restore_fragment_sampler_views(ctx->cso);
 732    cso_restore_framebuffer(ctx->cso);
 733    cso_restore_fragment_shader(ctx->cso);
 734    cso_restore_vertex_shader(ctx->cso);
 735    cso_restore_clip(ctx->cso);
 736    cso_restore_vertex_elements(ctx->cso);
 737 }