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_vertex_element velem[2];
  66    enum pipe_texture_target internal_target;
  67
  68    void *vs;
  69    void *fs[TGSI_WRITEMASK_XYZW + 1];
  70    void *fs_depth;
  71
  72    struct pipe_resource *vbuf;  /**< quad vertices */
  73    unsigned vbuf_slot;
  74
  75    float vertices[4][2][4];   /**< vertex/texcoords for quad */
  76 };
  77
  78
  79 /**
  80  * Create state object for blit.
  81  * Intended to be created once and re-used for many blit() calls.
  82  */
  83 struct blit_state *
  84 util_create_blit(struct pipe_context *pipe, struct cso_context *cso)
  85 {
  86    struct blit_state *ctx;
  87    uint i;
  88
  89    ctx = CALLOC_STRUCT(blit_state);
  90    if (!ctx)
  91       return NULL;
  92
  93    ctx->pipe = pipe;
  94    ctx->cso = cso;
  95
  96    /* disabled blending/masking */
  97    memset(&ctx->blend, 0, sizeof(ctx->blend));
  98    ctx->blend.rt[0].colormask = PIPE_MASK_RGBA;
  99
 100    /* no-op depth/stencil/alpha */
 101    memset(&ctx->depthstencil_keep, 0, sizeof(ctx->depthstencil_keep));
 102    memset(&ctx->depthstencil_write, 0, sizeof(ctx->depthstencil_write));
 103    ctx->depthstencil_write.depth.enabled = 1;
 104    ctx->depthstencil_write.depth.writemask = 1;
 105    ctx->depthstencil_write.depth.func = PIPE_FUNC_ALWAYS;
 106
 107    /* rasterizer */
 108    memset(&ctx->rasterizer, 0, sizeof(ctx->rasterizer));
 109    ctx->rasterizer.cull_face = PIPE_FACE_NONE;
 110    ctx->rasterizer.gl_rasterization_rules = 1;
 111    ctx->rasterizer.depth_clip = 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    ctx->vbuf = NULL;
 132
 133    /* init vertex data that doesn't change */
 134    for (i = 0; i < 4; i++) {
 135       ctx->vertices[i][0][3] = 1.0f; /* w */
 136       ctx->vertices[i][1][2] = 0.0f; /* r */
 137       ctx->vertices[i][1][3] = 1.0f; /* q */
 138    }
 139
 140    if(pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 141       ctx->internal_target = PIPE_TEXTURE_2D;
 142    else
 143       ctx->internal_target = PIPE_TEXTURE_RECT;
 144
 145    return ctx;
 146 }
 147
 148
 149 /**
 150  * Destroy a blit context
 151  */
 152 void
 153 util_destroy_blit(struct blit_state *ctx)
 154 {
 155    struct pipe_context *pipe = ctx->pipe;
 156    unsigned i;
 157
 158    if (ctx->vs)
 159       pipe->delete_vs_state(pipe, ctx->vs);
 160
 161    for (i = 0; i < Elements(ctx->fs); i++)
 162       if (ctx->fs[i])
 163          pipe->delete_fs_state(pipe, ctx->fs[i]);
 164
 165    if (ctx->fs_depth)
 166       pipe->delete_fs_state(pipe, ctx->fs_depth);
 167
 168    pipe_resource_reference(&ctx->vbuf, NULL);
 169
 170    FREE(ctx);
 171 }
 172
 173
 174 /**
 175  * Helper function to set the fragment shaders.
 176  */
 177 static INLINE void
 178 set_fragment_shader(struct blit_state *ctx, uint writemask)
 179 {
 180    if (!ctx->fs[writemask])
 181       ctx->fs[writemask] =
 182          util_make_fragment_tex_shader_writemask(ctx->pipe, TGSI_TEXTURE_2D,
 183                                                  TGSI_INTERPOLATE_LINEAR,
 184                                                  writemask);
 185
 186    cso_set_fragment_shader_handle(ctx->cso, ctx->fs[writemask]);
 187 }
 188
 189
 190 /**
 191  * Helper function to set the depthwrite shader.
 192  */
 193 static INLINE void
 194 set_depth_fragment_shader(struct blit_state *ctx)
 195 {
 196    if (!ctx->fs_depth)
 197       ctx->fs_depth =
 198          util_make_fragment_tex_shader_writedepth(ctx->pipe, TGSI_TEXTURE_2D,
 199                                                   TGSI_INTERPOLATE_LINEAR);
 200
 201    cso_set_fragment_shader_handle(ctx->cso, ctx->fs_depth);
 202 }
 203
 204
 205 /**
 206  * Helper function to set the vertex shader.
 207  */
 208 static INLINE void
 209 set_vertex_shader(struct blit_state *ctx)
 210 {
 211    /* vertex shader - still required to provide the linkage between
 212     * fragment shader input semantics and vertex_element/buffers.
 213     */
 214    if (!ctx->vs) {
 215       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 216                                       TGSI_SEMANTIC_GENERIC };
 217       const uint semantic_indexes[] = { 0, 0 };
 218       ctx->vs = util_make_vertex_passthrough_shader(ctx->pipe, 2,
 219                                                     semantic_names,
 220                                                     semantic_indexes);
 221    }
 222
 223    cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
 224 }
 225
 226
 227 /**
 228  * Get offset of next free slot in vertex buffer for quad vertices.
 229  */
 230 static unsigned
 231 get_next_slot( struct blit_state *ctx )
 232 {
 233    const unsigned max_slots = 4096 / sizeof ctx->vertices;
 234
 235    if (ctx->vbuf_slot >= max_slots)
 236       util_blit_flush( ctx );
 237
 238    if (!ctx->vbuf) {
 239       ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
 240                                      PIPE_BIND_VERTEX_BUFFER,
 241                                      PIPE_USAGE_STREAM,
 242                                      max_slots * sizeof ctx->vertices);
 243    }
 244
 245    return ctx->vbuf_slot++ * sizeof ctx->vertices;
 246 }
 247
 248
 249
 250
 251 /**
 252  * Setup vertex data for the textured quad we'll draw.
 253  * Note: y=0=top
 254  */
 255 static unsigned
 256 setup_vertex_data_tex(struct blit_state *ctx,
 257                       float x0, float y0, float x1, float y1,
 258                       float s0, float t0, float s1, float t1,
 259                       float z)
 260 {
 261    unsigned offset;
 262
 263    ctx->vertices[0][0][0] = x0;
 264    ctx->vertices[0][0][1] = y0;
 265    ctx->vertices[0][0][2] = z;
 266    ctx->vertices[0][1][0] = s0; /*s*/
 267    ctx->vertices[0][1][1] = t0; /*t*/
 268
 269    ctx->vertices[1][0][0] = x1;
 270    ctx->vertices[1][0][1] = y0;
 271    ctx->vertices[1][0][2] = z;
 272    ctx->vertices[1][1][0] = s1; /*s*/
 273    ctx->vertices[1][1][1] = t0; /*t*/
 274
 275    ctx->vertices[2][0][0] = x1;
 276    ctx->vertices[2][0][1] = y1;
 277    ctx->vertices[2][0][2] = z;
 278    ctx->vertices[2][1][0] = s1;
 279    ctx->vertices[2][1][1] = t1;
 280
 281    ctx->vertices[3][0][0] = x0;
 282    ctx->vertices[3][0][1] = y1;
 283    ctx->vertices[3][0][2] = z;
 284    ctx->vertices[3][1][0] = s0;
 285    ctx->vertices[3][1][1] = t1;
 286
 287    offset = get_next_slot( ctx );
 288
 289    if (ctx->vbuf) {
 290       pipe_buffer_write_nooverlap(ctx->pipe, ctx->vbuf,
 291                                   offset, sizeof(ctx->vertices), ctx->vertices);
 292    }
 293
 294    return offset;
 295 }
 296
 297
 298 /**
 299  * \return TRUE if two regions overlap, FALSE otherwise
 300  */
 301 static boolean
 302 regions_overlap(int srcX0, int srcY0,
 303                 int srcX1, int srcY1,
 304                 int dstX0, int dstY0,
 305                 int dstX1, int dstY1)
 306 {
 307    if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1))
 308       return FALSE; /* src completely left of dst */
 309
 310    if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))
 311       return FALSE; /* dst completely left of src */
 312
 313    if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))
 314       return FALSE; /* src completely above dst */
 315
 316    if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))
 317       return FALSE; /* dst completely above src */
 318
 319    return TRUE; /* some overlap */
 320 }
 321
 322
 323 /**
 324  * Copy pixel block from src surface to dst surface.
 325  * Overlapping regions are acceptable.
 326  * Flipping and stretching are supported.
 327  * \param filter  one of PIPE_TEX_MIPFILTER_NEAREST/LINEAR
 328  * \param writemask  controls which channels in the dest surface are sourced
 329  *                   from the src surface.  Disabled channels are sourced
 330  *                   from (0,0,0,1).
 331  * XXX need some control over blitting stencil.
 332  */
 333 void
 334 util_blit_pixels_writemask(struct blit_state *ctx,
 335                            struct pipe_resource *src_tex,
 336                            unsigned src_level,
 337                            int srcX0, int srcY0,
 338                            int srcX1, int srcY1,
 339                            int srcZ0,
 340                            struct pipe_surface *dst,
 341                            int dstX0, int dstY0,
 342                            int dstX1, int dstY1,
 343                            float z, uint filter,
 344                            uint writemask)
 345 {
 346    struct pipe_context *pipe = ctx->pipe;
 347    struct pipe_screen *screen = pipe->screen;
 348    enum pipe_format src_format, dst_format;
 349    struct pipe_sampler_view *sampler_view = NULL;
 350    struct pipe_sampler_view sv_templ;
 351    struct pipe_surface *dst_surface;
 352    struct pipe_framebuffer_state fb;
 353    const int srcW = abs(srcX1 - srcX0);
 354    const int srcH = abs(srcY1 - srcY0);
 355    unsigned offset;
 356    boolean overlap, dst_is_depth;
 357    float s0, t0, s1, t1;
 358    boolean normalized;
 359
 360    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 361           filter == PIPE_TEX_MIPFILTER_LINEAR);
 362
 363    assert(src_level <= src_tex->last_level);
 364
 365    /* do the regions overlap? */
 366    overlap = src_tex == dst->texture &&
 367              dst->u.tex.level == src_level &&
 368              dst->u.tex.first_layer == srcZ0 &&
 369       regions_overlap(srcX0, srcY0, srcX1, srcY1,
 370                       dstX0, dstY0, dstX1, dstY1);
 371
 372    src_format = util_format_linear(src_tex->format);
 373    dst_format = util_format_linear(dst->format);
 374
 375    /*
 376     * Check for simple case:  no format conversion, no flipping, no stretching,
 377     * no overlapping.
 378     * Filter mode should not matter since there's no stretching.
 379     */
 380    if (dst_format == src_format &&
 381        srcX0 < srcX1 &&
 382        dstX0 < dstX1 &&
 383        srcY0 < srcY1 &&
 384        dstY0 < dstY1 &&
 385        (dstX1 - dstX0) == (srcX1 - srcX0) &&
 386        (dstY1 - dstY0) == (srcY1 - srcY0) &&
 387        !overlap) {
 388       struct pipe_box src_box;
 389       src_box.x = srcX0;
 390       src_box.y = srcY0;
 391       src_box.z = srcZ0;
 392       src_box.width = srcW;
 393       src_box.height = srcH;
 394       src_box.depth = 1;
 395       pipe->resource_copy_region(pipe,
 396                                  dst->texture, dst->u.tex.level,
 397                                  dstX0, dstY0, dst->u.tex.first_layer,/* dest */
 398                                  src_tex, src_level,
 399                                  &src_box);
 400        return;
 401    }
 402
 403    if (dst_format == dst->format) {
 404       dst_surface = dst;
 405    } else {
 406       struct pipe_surface templ = *dst;
 407       templ.format = dst_format;
 408       dst_surface = pipe->create_surface(pipe, dst->texture, &templ);
 409    }
 410
 411    /* Create a temporary texture when src and dest alias or when src
 412     * is anything other than a 2d texture.
 413     * XXX should just use appropriate shader to access 1d / 3d slice / cube face,
 414     * much like the u_blitter code does (should be pretty trivial).
 415     *
 416     * This can still be improved upon.
 417     */
 418    if ((src_tex == dst_surface->texture &&
 419        dst_surface->u.tex.level == src_level &&
 420        dst_surface->u.tex.first_layer == srcZ0) ||
 421        (src_tex->target != PIPE_TEXTURE_2D &&
 422        src_tex->target != PIPE_TEXTURE_2D &&
 423        src_tex->target != PIPE_TEXTURE_RECT))
 424    {
 425       struct pipe_resource texTemp;
 426       struct pipe_resource *tex;
 427       struct pipe_sampler_view sv_templ;
 428       struct pipe_box src_box;
 429       const int srcLeft = MIN2(srcX0, srcX1);
 430       const int srcTop = MIN2(srcY0, srcY1);
 431
 432       if (srcLeft != srcX0) {
 433          /* left-right flip */
 434          int tmp = dstX0;
 435          dstX0 = dstX1;
 436          dstX1 = tmp;
 437       }
 438
 439       if (srcTop != srcY0) {
 440          /* up-down flip */
 441          int tmp = dstY0;
 442          dstY0 = dstY1;
 443          dstY1 = tmp;
 444       }
 445
 446       /* create temp texture */
 447       memset(&texTemp, 0, sizeof(texTemp));
 448       texTemp.target = ctx->internal_target;
 449       texTemp.format = src_format;
 450       texTemp.last_level = 0;
 451       texTemp.width0 = srcW;
 452       texTemp.height0 = srcH;
 453       texTemp.depth0 = 1;
 454       texTemp.array_size = 1;
 455       texTemp.bind = PIPE_BIND_SAMPLER_VIEW;
 456
 457       tex = screen->resource_create(screen, &texTemp);
 458       if (!tex)
 459          return;
 460
 461       src_box.x = srcLeft;
 462       src_box.y = srcTop;
 463       src_box.z = srcZ0;
 464       src_box.width = srcW;
 465       src_box.height = srcH;
 466       src_box.depth = 1;
 467       /* load temp texture */
 468       pipe->resource_copy_region(pipe,
 469                                  tex, 0, 0, 0, 0,  /* dest */
 470                                  src_tex, src_level, &src_box);
 471
 472       normalized = tex->target != PIPE_TEXTURE_RECT;
 473       if(normalized) {
 474          s0 = 0.0f;
 475          s1 = 1.0f;
 476          t0 = 0.0f;
 477          t1 = 1.0f;
 478       }
 479       else {
 480          s0 = 0;
 481          s1 = srcW;
 482          t0 = 0;
 483          t1 = srcH;
 484       }
 485
 486       u_sampler_view_default_template(&sv_templ, tex, tex->format);
 487       sampler_view = pipe->create_sampler_view(pipe, tex, &sv_templ);
 488
 489       if (!sampler_view) {
 490          pipe_resource_reference(&tex, NULL);
 491          return;
 492       }
 493       pipe_resource_reference(&tex, NULL);
 494    }
 495    else {
 496       u_sampler_view_default_template(&sv_templ, src_tex, src_format);
 497       sampler_view = pipe->create_sampler_view(pipe, src_tex, &sv_templ);
 498
 499       if (!sampler_view) {
 500          return;
 501       }
 502
 503       s0 = srcX0;
 504       s1 = srcX1;
 505       t0 = srcY0;
 506       t1 = srcY1;
 507       normalized = sampler_view->texture->target != PIPE_TEXTURE_RECT;
 508       if(normalized)
 509       {
 510          s0 /= (float)(u_minify(sampler_view->texture->width0, src_level));
 511          s1 /= (float)(u_minify(sampler_view->texture->width0, src_level));
 512          t0 /= (float)(u_minify(sampler_view->texture->height0, src_level));
 513          t1 /= (float)(u_minify(sampler_view->texture->height0, src_level));
 514       }
 515    }
 516
 517    dst_is_depth = util_format_is_depth_or_stencil(dst_format);
 518
 519    assert(screen->is_format_supported(screen, sampler_view->format, ctx->internal_target,
 520                                       sampler_view->texture->nr_samples,
 521                                       PIPE_BIND_SAMPLER_VIEW));
 522    assert(screen->is_format_supported(screen, dst_format, ctx->internal_target,
 523                                       dst_surface->texture->nr_samples,
 524                                       dst_is_depth ? PIPE_BIND_DEPTH_STENCIL :
 525                                                      PIPE_BIND_RENDER_TARGET));
 526    /* save state (restored below) */
 527    cso_save_blend(ctx->cso);
 528    cso_save_depth_stencil_alpha(ctx->cso);
 529    cso_save_rasterizer(ctx->cso);
 530    cso_save_samplers(ctx->cso);
 531    cso_save_fragment_sampler_views(ctx->cso);
 532    cso_save_stream_outputs(ctx->cso);
 533    cso_save_viewport(ctx->cso);
 534    cso_save_framebuffer(ctx->cso);
 535    cso_save_fragment_shader(ctx->cso);
 536    cso_save_vertex_shader(ctx->cso);
 537    cso_save_geometry_shader(ctx->cso);
 538    cso_save_vertex_elements(ctx->cso);
 539    cso_save_vertex_buffers(ctx->cso);
 540
 541    /* set misc state we care about */
 542    cso_set_blend(ctx->cso, &ctx->blend);
 543    cso_set_depth_stencil_alpha(ctx->cso,
 544                                dst_is_depth ? &ctx->depthstencil_write :
 545                                               &ctx->depthstencil_keep);
 546    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 547    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
 548    cso_set_stream_outputs(ctx->cso, 0, NULL, 0);
 549
 550    /* sampler */
 551    ctx->sampler.normalized_coords = normalized;
 552    ctx->sampler.min_img_filter = filter;
 553    ctx->sampler.mag_img_filter = filter;
 554    ctx->sampler.min_lod = src_level;
 555    ctx->sampler.max_lod = src_level;
 556    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 557    cso_single_sampler_done(ctx->cso);
 558
 559    /* viewport */
 560    ctx->viewport.scale[0] = 0.5f * dst_surface->width;
 561    ctx->viewport.scale[1] = 0.5f * dst_surface->height;
 562    ctx->viewport.scale[2] = 0.5f;
 563    ctx->viewport.scale[3] = 1.0f;
 564    ctx->viewport.translate[0] = 0.5f * dst_surface->width;
 565    ctx->viewport.translate[1] = 0.5f * dst_surface->height;
 566    ctx->viewport.translate[2] = 0.5f;
 567    ctx->viewport.translate[3] = 0.0f;
 568    cso_set_viewport(ctx->cso, &ctx->viewport);
 569
 570    /* texture */
 571    cso_set_fragment_sampler_views(ctx->cso, 1, &sampler_view);
 572
 573    /* shaders */
 574    if (dst_is_depth) {
 575       set_depth_fragment_shader(ctx);
 576    } else {
 577       set_fragment_shader(ctx, writemask);
 578    }
 579    set_vertex_shader(ctx);
 580    cso_set_geometry_shader_handle(ctx->cso, NULL);
 581
 582    /* drawing dest */
 583    memset(&fb, 0, sizeof(fb));
 584    fb.width = dst_surface->width;
 585    fb.height = dst_surface->height;
 586    if (dst_is_depth) {
 587       fb.zsbuf = dst_surface;
 588    } else {
 589       fb.nr_cbufs = 1;
 590       fb.cbufs[0] = dst_surface;
 591    }
 592    cso_set_framebuffer(ctx->cso, &fb);
 593
 594    /* draw quad */
 595    offset = setup_vertex_data_tex(ctx,
 596                                   (float) dstX0 / dst_surface->width * 2.0f - 1.0f,
 597                                   (float) dstY0 / dst_surface->height * 2.0f - 1.0f,
 598                                   (float) dstX1 / dst_surface->width * 2.0f - 1.0f,
 599                                   (float) dstY1 / dst_surface->height * 2.0f - 1.0f,
 600                                   s0, t0,
 601                                   s1, t1,
 602                                   z);
 603
 604    if (ctx->vbuf) {
 605       util_draw_vertex_buffer(ctx->pipe, ctx->cso, ctx->vbuf, offset,
 606                               PIPE_PRIM_TRIANGLE_FAN,
 607                               4,  /* verts */
 608                               2); /* attribs/vert */
 609    }
 610
 611    /* restore state we changed */
 612    cso_restore_blend(ctx->cso);
 613    cso_restore_depth_stencil_alpha(ctx->cso);
 614    cso_restore_rasterizer(ctx->cso);
 615    cso_restore_samplers(ctx->cso);
 616    cso_restore_fragment_sampler_views(ctx->cso);
 617    cso_restore_viewport(ctx->cso);
 618    cso_restore_framebuffer(ctx->cso);
 619    cso_restore_fragment_shader(ctx->cso);
 620    cso_restore_vertex_shader(ctx->cso);
 621    cso_restore_geometry_shader(ctx->cso);
 622    cso_restore_vertex_elements(ctx->cso);
 623    cso_restore_vertex_buffers(ctx->cso);
 624    cso_restore_stream_outputs(ctx->cso);
 625
 626    pipe_sampler_view_reference(&sampler_view, NULL);
 627    if (dst_surface != dst)
 628       pipe_surface_reference(&dst_surface, NULL);
 629 }
 630
 631
 632 void
 633 util_blit_pixels(struct blit_state *ctx,
 634                  struct pipe_resource *src_tex,
 635                  unsigned src_level,
 636                  int srcX0, int srcY0,
 637                  int srcX1, int srcY1,
 638                  int srcZ,
 639                  struct pipe_surface *dst,
 640                  int dstX0, int dstY0,
 641                  int dstX1, int dstY1,
 642                  float z, uint filter )
 643 {
 644    util_blit_pixels_writemask( ctx, src_tex,
 645                                src_level,
 646                                srcX0, srcY0,
 647                                srcX1, srcY1,
 648                                srcZ,
 649                                dst,
 650                                dstX0, dstY0,
 651                                dstX1, dstY1,
 652                                z, filter,
 653                                TGSI_WRITEMASK_XYZW );
 654 }
 655
 656
 657 /* Release vertex buffer at end of frame to avoid synchronous
 658  * rendering.
 659  */
 660 void util_blit_flush( struct blit_state *ctx )
 661 {
 662    pipe_resource_reference(&ctx->vbuf, NULL);
 663    ctx->vbuf_slot = 0;
 664 }
 665
 666
 667
 668 /**
 669  * Copy pixel block from src texture to dst surface.
 670  * The sampler view's first_level field indicates the source
 671  * mipmap level to use.
 672  * XXX need some control over blitting Z and/or stencil.
 673  */
 674 void
 675 util_blit_pixels_tex(struct blit_state *ctx,
 676                      struct pipe_sampler_view *src_sampler_view,
 677                      int srcX0, int srcY0,
 678                      int srcX1, int srcY1,
 679                      struct pipe_surface *dst,
 680                      int dstX0, int dstY0,
 681                      int dstX1, int dstY1,
 682                      float z, uint filter)
 683 {
 684    boolean normalized = src_sampler_view->texture->target != PIPE_TEXTURE_RECT;
 685    struct pipe_framebuffer_state fb;
 686    float s0, t0, s1, t1;
 687    unsigned offset;
 688    struct pipe_resource *tex = src_sampler_view->texture;
 689
 690    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 691           filter == PIPE_TEX_MIPFILTER_LINEAR);
 692
 693    assert(tex);
 694    assert(tex->width0 != 0);
 695    assert(tex->height0 != 0);
 696
 697    s0 = srcX0;
 698    s1 = srcX1;
 699    t0 = srcY0;
 700    t1 = srcY1;
 701
 702    if(normalized)
 703    {
 704       /* normalize according to the mipmap level's size */
 705       int level = src_sampler_view->u.tex.first_level;
 706       float w = (float) u_minify(tex->width0, level);
 707       float h = (float) u_minify(tex->height0, level);
 708       s0 /= w;
 709       s1 /= w;
 710       t0 /= h;
 711       t1 /= h;
 712    }
 713
 714    assert(ctx->pipe->screen->is_format_supported(ctx->pipe->screen, dst->format,
 715                                                  PIPE_TEXTURE_2D,
 716                                                  dst->texture->nr_samples,
 717                                                  PIPE_BIND_RENDER_TARGET));
 718
 719    /* save state (restored below) */
 720    cso_save_blend(ctx->cso);
 721    cso_save_depth_stencil_alpha(ctx->cso);
 722    cso_save_rasterizer(ctx->cso);
 723    cso_save_samplers(ctx->cso);
 724    cso_save_fragment_sampler_views(ctx->cso);
 725    cso_save_stream_outputs(ctx->cso);
 726    cso_save_viewport(ctx->cso);
 727    cso_save_framebuffer(ctx->cso);
 728    cso_save_fragment_shader(ctx->cso);
 729    cso_save_vertex_shader(ctx->cso);
 730    cso_save_geometry_shader(ctx->cso);
 731    cso_save_vertex_elements(ctx->cso);
 732    cso_save_vertex_buffers(ctx->cso);
 733
 734    /* set misc state we care about */
 735    cso_set_blend(ctx->cso, &ctx->blend);
 736    cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil_keep);
 737    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 738    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
 739    cso_set_stream_outputs(ctx->cso, 0, NULL, 0);
 740
 741    /* sampler */
 742    ctx->sampler.normalized_coords = normalized;
 743    ctx->sampler.min_img_filter = filter;
 744    ctx->sampler.mag_img_filter = filter;
 745    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 746    cso_single_sampler_done(ctx->cso);
 747
 748    /* viewport */
 749    ctx->viewport.scale[0] = 0.5f * dst->width;
 750    ctx->viewport.scale[1] = 0.5f * dst->height;
 751    ctx->viewport.scale[2] = 0.5f;
 752    ctx->viewport.scale[3] = 1.0f;
 753    ctx->viewport.translate[0] = 0.5f * dst->width;
 754    ctx->viewport.translate[1] = 0.5f * dst->height;
 755    ctx->viewport.translate[2] = 0.5f;
 756    ctx->viewport.translate[3] = 0.0f;
 757    cso_set_viewport(ctx->cso, &ctx->viewport);
 758
 759    /* texture */
 760    cso_set_fragment_sampler_views(ctx->cso, 1, &src_sampler_view);
 761
 762    /* shaders */
 763    set_fragment_shader(ctx, TGSI_WRITEMASK_XYZW);
 764    set_vertex_shader(ctx);
 765    cso_set_geometry_shader_handle(ctx->cso, NULL);
 766
 767    /* drawing dest */
 768    memset(&fb, 0, sizeof(fb));
 769    fb.width = dst->width;
 770    fb.height = dst->height;
 771    fb.nr_cbufs = 1;
 772    fb.cbufs[0] = dst;
 773    cso_set_framebuffer(ctx->cso, &fb);
 774
 775    /* draw quad */
 776    offset = setup_vertex_data_tex(ctx,
 777                                   (float) dstX0 / dst->width * 2.0f - 1.0f,
 778                                   (float) dstY0 / dst->height * 2.0f - 1.0f,
 779                                   (float) dstX1 / dst->width * 2.0f - 1.0f,
 780                                   (float) dstY1 / dst->height * 2.0f - 1.0f,
 781                                   s0, t0, s1, t1,
 782                                   z);
 783
 784    util_draw_vertex_buffer(ctx->pipe, ctx->cso,
 785                            ctx->vbuf, offset,
 786                            PIPE_PRIM_TRIANGLE_FAN,
 787                            4,  /* verts */
 788                            2); /* attribs/vert */
 789
 790    /* restore state we changed */
 791    cso_restore_blend(ctx->cso);
 792    cso_restore_depth_stencil_alpha(ctx->cso);
 793    cso_restore_rasterizer(ctx->cso);
 794    cso_restore_samplers(ctx->cso);
 795    cso_restore_fragment_sampler_views(ctx->cso);
 796    cso_restore_viewport(ctx->cso);
 797    cso_restore_framebuffer(ctx->cso);
 798    cso_restore_fragment_shader(ctx->cso);
 799    cso_restore_vertex_shader(ctx->cso);
 800    cso_restore_geometry_shader(ctx->cso);
 801    cso_restore_vertex_elements(ctx->cso);
 802    cso_restore_vertex_buffers(ctx->cso);
 803    cso_restore_stream_outputs(ctx->cso);
 804 }