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       pipe_resource_reference(&ctx->vbuf, NULL);
 237       ctx->vbuf_slot = 0;
 238    }
 239
 240    if (!ctx->vbuf) {
 241       ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
 242                                      PIPE_BIND_VERTEX_BUFFER,
 243                                      PIPE_USAGE_STREAM,
 244                                      max_slots * sizeof ctx->vertices);
 245    }
 246
 247    return ctx->vbuf_slot++ * sizeof ctx->vertices;
 248 }
 249
 250
 251
 252
 253 /**
 254  * Setup vertex data for the textured quad we'll draw.
 255  * Note: y=0=top
 256  */
 257 static unsigned
 258 setup_vertex_data_tex(struct blit_state *ctx,
 259                       float x0, float y0, float x1, float y1,
 260                       float s0, float t0, float s1, float t1,
 261                       float z)
 262 {
 263    unsigned offset;
 264
 265    ctx->vertices[0][0][0] = x0;
 266    ctx->vertices[0][0][1] = y0;
 267    ctx->vertices[0][0][2] = z;
 268    ctx->vertices[0][1][0] = s0; /*s*/
 269    ctx->vertices[0][1][1] = t0; /*t*/
 270
 271    ctx->vertices[1][0][0] = x1;
 272    ctx->vertices[1][0][1] = y0;
 273    ctx->vertices[1][0][2] = z;
 274    ctx->vertices[1][1][0] = s1; /*s*/
 275    ctx->vertices[1][1][1] = t0; /*t*/
 276
 277    ctx->vertices[2][0][0] = x1;
 278    ctx->vertices[2][0][1] = y1;
 279    ctx->vertices[2][0][2] = z;
 280    ctx->vertices[2][1][0] = s1;
 281    ctx->vertices[2][1][1] = t1;
 282
 283    ctx->vertices[3][0][0] = x0;
 284    ctx->vertices[3][0][1] = y1;
 285    ctx->vertices[3][0][2] = z;
 286    ctx->vertices[3][1][0] = s0;
 287    ctx->vertices[3][1][1] = t1;
 288
 289    offset = get_next_slot( ctx );
 290
 291    if (ctx->vbuf) {
 292       pipe_buffer_write_nooverlap(ctx->pipe, ctx->vbuf,
 293                                   offset, sizeof(ctx->vertices), ctx->vertices);
 294    }
 295
 296    return offset;
 297 }
 298
 299
 300 /**
 301  * \return TRUE if two regions overlap, FALSE otherwise
 302  */
 303 static boolean
 304 regions_overlap(int srcX0, int srcY0,
 305                 int srcX1, int srcY1,
 306                 int dstX0, int dstY0,
 307                 int dstX1, int dstY1)
 308 {
 309    if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1))
 310       return FALSE; /* src completely left of dst */
 311
 312    if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))
 313       return FALSE; /* dst completely left of src */
 314
 315    if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))
 316       return FALSE; /* src completely above dst */
 317
 318    if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))
 319       return FALSE; /* dst completely above src */
 320
 321    return TRUE; /* some overlap */
 322 }
 323
 324
 325 /**
 326  * Can we blit from src format to dest format with a simple copy?
 327  */
 328 static boolean
 329 formats_compatible(enum pipe_format src_format,
 330                    enum pipe_format dst_format)
 331 {
 332    if (src_format == dst_format) {
 333       return TRUE;
 334    }
 335    else {
 336       const struct util_format_description *src_desc =
 337          util_format_description(src_format);
 338       const struct util_format_description *dst_desc =
 339          util_format_description(dst_format);
 340       return util_is_format_compatible(src_desc, dst_desc);
 341    }
 342 }
 343
 344
 345 /**
 346  * Copy pixel block from src surface to dst surface.
 347  * Overlapping regions are acceptable.
 348  * Flipping and stretching are supported.
 349  * \param filter  one of PIPE_TEX_MIPFILTER_NEAREST/LINEAR
 350  * \param writemask  controls which channels in the dest surface are sourced
 351  *                   from the src surface.  Disabled channels are sourced
 352  *                   from (0,0,0,1).
 353  * XXX need some control over blitting stencil.
 354  */
 355 void
 356 util_blit_pixels_writemask(struct blit_state *ctx,
 357                            struct pipe_resource *src_tex,
 358                            unsigned src_level,
 359                            int srcX0, int srcY0,
 360                            int srcX1, int srcY1,
 361                            int srcZ0,
 362                            struct pipe_surface *dst,
 363                            int dstX0, int dstY0,
 364                            int dstX1, int dstY1,
 365                            float z, uint filter,
 366                            uint writemask)
 367 {
 368    struct pipe_context *pipe = ctx->pipe;
 369    struct pipe_screen *screen = pipe->screen;
 370    enum pipe_format src_format, dst_format;
 371    struct pipe_sampler_view *sampler_view = NULL;
 372    struct pipe_sampler_view sv_templ;
 373    struct pipe_surface *dst_surface;
 374    struct pipe_framebuffer_state fb;
 375    const int srcW = abs(srcX1 - srcX0);
 376    const int srcH = abs(srcY1 - srcY0);
 377    unsigned offset;
 378    boolean overlap, dst_is_depth;
 379    float s0, t0, s1, t1;
 380    boolean normalized;
 381
 382    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 383           filter == PIPE_TEX_MIPFILTER_LINEAR);
 384
 385    assert(src_level <= src_tex->last_level);
 386
 387    /* do the regions overlap? */
 388    overlap = src_tex == dst->texture &&
 389              dst->u.tex.level == src_level &&
 390              dst->u.tex.first_layer == srcZ0 &&
 391       regions_overlap(srcX0, srcY0, srcX1, srcY1,
 392                       dstX0, dstY0, dstX1, dstY1);
 393
 394    src_format = util_format_linear(src_tex->format);
 395    dst_format = util_format_linear(dst->format);
 396
 397    /*
 398     * Check for simple case:  no format conversion, no flipping, no stretching,
 399     * no overlapping.
 400     * Filter mode should not matter since there's no stretching.
 401     */
 402    if (formats_compatible(src_format, dst_format) &&
 403        srcX0 < srcX1 &&
 404        dstX0 < dstX1 &&
 405        srcY0 < srcY1 &&
 406        dstY0 < dstY1 &&
 407        (dstX1 - dstX0) == (srcX1 - srcX0) &&
 408        (dstY1 - dstY0) == (srcY1 - srcY0) &&
 409        !overlap) {
 410       struct pipe_box src_box;
 411       src_box.x = srcX0;
 412       src_box.y = srcY0;
 413       src_box.z = srcZ0;
 414       src_box.width = srcW;
 415       src_box.height = srcH;
 416       src_box.depth = 1;
 417       pipe->resource_copy_region(pipe,
 418                                  dst->texture, dst->u.tex.level,
 419                                  dstX0, dstY0, dst->u.tex.first_layer,/* dest */
 420                                  src_tex, src_level,
 421                                  &src_box);
 422        return;
 423    }
 424
 425    if (dst_format == dst->format) {
 426       dst_surface = dst;
 427    } else {
 428       struct pipe_surface templ = *dst;
 429       templ.format = dst_format;
 430       dst_surface = pipe->create_surface(pipe, dst->texture, &templ);
 431    }
 432
 433    /* Create a temporary texture when src and dest alias or when src
 434     * is anything other than a 2d texture.
 435     * XXX should just use appropriate shader to access 1d / 3d slice / cube face,
 436     * much like the u_blitter code does (should be pretty trivial).
 437     *
 438     * This can still be improved upon.
 439     */
 440    if ((src_tex == dst_surface->texture &&
 441        dst_surface->u.tex.level == src_level &&
 442        dst_surface->u.tex.first_layer == srcZ0) ||
 443        (src_tex->target != PIPE_TEXTURE_2D &&
 444        src_tex->target != PIPE_TEXTURE_2D &&
 445        src_tex->target != PIPE_TEXTURE_RECT))
 446    {
 447       struct pipe_resource texTemp;
 448       struct pipe_resource *tex;
 449       struct pipe_sampler_view sv_templ;
 450       struct pipe_box src_box;
 451       const int srcLeft = MIN2(srcX0, srcX1);
 452       const int srcTop = MIN2(srcY0, srcY1);
 453
 454       if (srcLeft != srcX0) {
 455          /* left-right flip */
 456          int tmp = dstX0;
 457          dstX0 = dstX1;
 458          dstX1 = tmp;
 459       }
 460
 461       if (srcTop != srcY0) {
 462          /* up-down flip */
 463          int tmp = dstY0;
 464          dstY0 = dstY1;
 465          dstY1 = tmp;
 466       }
 467
 468       /* create temp texture */
 469       memset(&texTemp, 0, sizeof(texTemp));
 470       texTemp.target = ctx->internal_target;
 471       texTemp.format = src_format;
 472       texTemp.last_level = 0;
 473       texTemp.width0 = srcW;
 474       texTemp.height0 = srcH;
 475       texTemp.depth0 = 1;
 476       texTemp.array_size = 1;
 477       texTemp.bind = PIPE_BIND_SAMPLER_VIEW;
 478
 479       tex = screen->resource_create(screen, &texTemp);
 480       if (!tex)
 481          return;
 482
 483       src_box.x = srcLeft;
 484       src_box.y = srcTop;
 485       src_box.z = srcZ0;
 486       src_box.width = srcW;
 487       src_box.height = srcH;
 488       src_box.depth = 1;
 489       /* load temp texture */
 490       pipe->resource_copy_region(pipe,
 491                                  tex, 0, 0, 0, 0,  /* dest */
 492                                  src_tex, src_level, &src_box);
 493
 494       normalized = tex->target != PIPE_TEXTURE_RECT;
 495       if(normalized) {
 496          s0 = 0.0f;
 497          s1 = 1.0f;
 498          t0 = 0.0f;
 499          t1 = 1.0f;
 500       }
 501       else {
 502          s0 = 0;
 503          s1 = srcW;
 504          t0 = 0;
 505          t1 = srcH;
 506       }
 507
 508       u_sampler_view_default_template(&sv_templ, tex, tex->format);
 509       sampler_view = pipe->create_sampler_view(pipe, tex, &sv_templ);
 510
 511       if (!sampler_view) {
 512          pipe_resource_reference(&tex, NULL);
 513          return;
 514       }
 515       pipe_resource_reference(&tex, NULL);
 516    }
 517    else {
 518       u_sampler_view_default_template(&sv_templ, src_tex, src_format);
 519       sampler_view = pipe->create_sampler_view(pipe, src_tex, &sv_templ);
 520
 521       if (!sampler_view) {
 522          return;
 523       }
 524
 525       s0 = srcX0;
 526       s1 = srcX1;
 527       t0 = srcY0;
 528       t1 = srcY1;
 529       normalized = sampler_view->texture->target != PIPE_TEXTURE_RECT;
 530       if(normalized)
 531       {
 532          s0 /= (float)(u_minify(sampler_view->texture->width0, src_level));
 533          s1 /= (float)(u_minify(sampler_view->texture->width0, src_level));
 534          t0 /= (float)(u_minify(sampler_view->texture->height0, src_level));
 535          t1 /= (float)(u_minify(sampler_view->texture->height0, src_level));
 536       }
 537    }
 538
 539    dst_is_depth = util_format_is_depth_or_stencil(dst_format);
 540
 541    assert(screen->is_format_supported(screen, sampler_view->format, ctx->internal_target,
 542                                       sampler_view->texture->nr_samples,
 543                                       PIPE_BIND_SAMPLER_VIEW));
 544    assert(screen->is_format_supported(screen, dst_format, ctx->internal_target,
 545                                       dst_surface->texture->nr_samples,
 546                                       dst_is_depth ? PIPE_BIND_DEPTH_STENCIL :
 547                                                      PIPE_BIND_RENDER_TARGET));
 548    /* save state (restored below) */
 549    cso_save_blend(ctx->cso);
 550    cso_save_depth_stencil_alpha(ctx->cso);
 551    cso_save_rasterizer(ctx->cso);
 552    cso_save_samplers(ctx->cso);
 553    cso_save_fragment_sampler_views(ctx->cso);
 554    cso_save_stream_outputs(ctx->cso);
 555    cso_save_viewport(ctx->cso);
 556    cso_save_framebuffer(ctx->cso);
 557    cso_save_fragment_shader(ctx->cso);
 558    cso_save_vertex_shader(ctx->cso);
 559    cso_save_geometry_shader(ctx->cso);
 560    cso_save_vertex_elements(ctx->cso);
 561    cso_save_vertex_buffers(ctx->cso);
 562
 563    /* set misc state we care about */
 564    cso_set_blend(ctx->cso, &ctx->blend);
 565    cso_set_depth_stencil_alpha(ctx->cso,
 566                                dst_is_depth ? &ctx->depthstencil_write :
 567                                               &ctx->depthstencil_keep);
 568    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 569    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
 570    cso_set_stream_outputs(ctx->cso, 0, NULL, 0);
 571
 572    /* sampler */
 573    ctx->sampler.normalized_coords = normalized;
 574    ctx->sampler.min_img_filter = filter;
 575    ctx->sampler.mag_img_filter = filter;
 576    ctx->sampler.min_lod = src_level;
 577    ctx->sampler.max_lod = src_level;
 578    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 579    cso_single_sampler_done(ctx->cso);
 580
 581    /* viewport */
 582    ctx->viewport.scale[0] = 0.5f * dst_surface->width;
 583    ctx->viewport.scale[1] = 0.5f * dst_surface->height;
 584    ctx->viewport.scale[2] = 0.5f;
 585    ctx->viewport.scale[3] = 1.0f;
 586    ctx->viewport.translate[0] = 0.5f * dst_surface->width;
 587    ctx->viewport.translate[1] = 0.5f * dst_surface->height;
 588    ctx->viewport.translate[2] = 0.5f;
 589    ctx->viewport.translate[3] = 0.0f;
 590    cso_set_viewport(ctx->cso, &ctx->viewport);
 591
 592    /* texture */
 593    cso_set_fragment_sampler_views(ctx->cso, 1, &sampler_view);
 594
 595    /* shaders */
 596    if (dst_is_depth) {
 597       set_depth_fragment_shader(ctx);
 598    } else {
 599       set_fragment_shader(ctx, writemask);
 600    }
 601    set_vertex_shader(ctx);
 602    cso_set_geometry_shader_handle(ctx->cso, NULL);
 603
 604    /* drawing dest */
 605    memset(&fb, 0, sizeof(fb));
 606    fb.width = dst_surface->width;
 607    fb.height = dst_surface->height;
 608    if (dst_is_depth) {
 609       fb.zsbuf = dst_surface;
 610    } else {
 611       fb.nr_cbufs = 1;
 612       fb.cbufs[0] = dst_surface;
 613    }
 614    cso_set_framebuffer(ctx->cso, &fb);
 615
 616    /* draw quad */
 617    offset = setup_vertex_data_tex(ctx,
 618                                   (float) dstX0 / dst_surface->width * 2.0f - 1.0f,
 619                                   (float) dstY0 / dst_surface->height * 2.0f - 1.0f,
 620                                   (float) dstX1 / dst_surface->width * 2.0f - 1.0f,
 621                                   (float) dstY1 / dst_surface->height * 2.0f - 1.0f,
 622                                   s0, t0,
 623                                   s1, t1,
 624                                   z);
 625
 626    if (ctx->vbuf) {
 627       util_draw_vertex_buffer(ctx->pipe, ctx->cso, ctx->vbuf, offset,
 628                               PIPE_PRIM_TRIANGLE_FAN,
 629                               4,  /* verts */
 630                               2); /* attribs/vert */
 631    }
 632
 633    /* restore state we changed */
 634    cso_restore_blend(ctx->cso);
 635    cso_restore_depth_stencil_alpha(ctx->cso);
 636    cso_restore_rasterizer(ctx->cso);
 637    cso_restore_samplers(ctx->cso);
 638    cso_restore_fragment_sampler_views(ctx->cso);
 639    cso_restore_viewport(ctx->cso);
 640    cso_restore_framebuffer(ctx->cso);
 641    cso_restore_fragment_shader(ctx->cso);
 642    cso_restore_vertex_shader(ctx->cso);
 643    cso_restore_geometry_shader(ctx->cso);
 644    cso_restore_vertex_elements(ctx->cso);
 645    cso_restore_vertex_buffers(ctx->cso);
 646    cso_restore_stream_outputs(ctx->cso);
 647
 648    pipe_sampler_view_reference(&sampler_view, NULL);
 649    if (dst_surface != dst)
 650       pipe_surface_reference(&dst_surface, NULL);
 651 }
 652
 653
 654 void
 655 util_blit_pixels(struct blit_state *ctx,
 656                  struct pipe_resource *src_tex,
 657                  unsigned src_level,
 658                  int srcX0, int srcY0,
 659                  int srcX1, int srcY1,
 660                  int srcZ,
 661                  struct pipe_surface *dst,
 662                  int dstX0, int dstY0,
 663                  int dstX1, int dstY1,
 664                  float z, uint filter )
 665 {
 666    util_blit_pixels_writemask( ctx, src_tex,
 667                                src_level,
 668                                srcX0, srcY0,
 669                                srcX1, srcY1,
 670                                srcZ,
 671                                dst,
 672                                dstX0, dstY0,
 673                                dstX1, dstY1,
 674                                z, filter,
 675                                TGSI_WRITEMASK_XYZW );
 676 }
 677
 678
 679 /**
 680  * Copy pixel block from src texture to dst surface.
 681  * The sampler view's first_level field indicates the source
 682  * mipmap level to use.
 683  * XXX need some control over blitting Z and/or stencil.
 684  */
 685 void
 686 util_blit_pixels_tex(struct blit_state *ctx,
 687                      struct pipe_sampler_view *src_sampler_view,
 688                      int srcX0, int srcY0,
 689                      int srcX1, int srcY1,
 690                      struct pipe_surface *dst,
 691                      int dstX0, int dstY0,
 692                      int dstX1, int dstY1,
 693                      float z, uint filter)
 694 {
 695    boolean normalized = src_sampler_view->texture->target != PIPE_TEXTURE_RECT;
 696    struct pipe_framebuffer_state fb;
 697    float s0, t0, s1, t1;
 698    unsigned offset;
 699    struct pipe_resource *tex = src_sampler_view->texture;
 700
 701    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 702           filter == PIPE_TEX_MIPFILTER_LINEAR);
 703
 704    assert(tex);
 705    assert(tex->width0 != 0);
 706    assert(tex->height0 != 0);
 707
 708    s0 = srcX0;
 709    s1 = srcX1;
 710    t0 = srcY0;
 711    t1 = srcY1;
 712
 713    if(normalized)
 714    {
 715       /* normalize according to the mipmap level's size */
 716       int level = src_sampler_view->u.tex.first_level;
 717       float w = (float) u_minify(tex->width0, level);
 718       float h = (float) u_minify(tex->height0, level);
 719       s0 /= w;
 720       s1 /= w;
 721       t0 /= h;
 722       t1 /= h;
 723    }
 724
 725    assert(ctx->pipe->screen->is_format_supported(ctx->pipe->screen, dst->format,
 726                                                  PIPE_TEXTURE_2D,
 727                                                  dst->texture->nr_samples,
 728                                                  PIPE_BIND_RENDER_TARGET));
 729
 730    /* save state (restored below) */
 731    cso_save_blend(ctx->cso);
 732    cso_save_depth_stencil_alpha(ctx->cso);
 733    cso_save_rasterizer(ctx->cso);
 734    cso_save_samplers(ctx->cso);
 735    cso_save_fragment_sampler_views(ctx->cso);
 736    cso_save_stream_outputs(ctx->cso);
 737    cso_save_viewport(ctx->cso);
 738    cso_save_framebuffer(ctx->cso);
 739    cso_save_fragment_shader(ctx->cso);
 740    cso_save_vertex_shader(ctx->cso);
 741    cso_save_geometry_shader(ctx->cso);
 742    cso_save_vertex_elements(ctx->cso);
 743    cso_save_vertex_buffers(ctx->cso);
 744
 745    /* set misc state we care about */
 746    cso_set_blend(ctx->cso, &ctx->blend);
 747    cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil_keep);
 748    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 749    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
 750    cso_set_stream_outputs(ctx->cso, 0, NULL, 0);
 751
 752    /* sampler */
 753    ctx->sampler.normalized_coords = normalized;
 754    ctx->sampler.min_img_filter = filter;
 755    ctx->sampler.mag_img_filter = filter;
 756    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 757    cso_single_sampler_done(ctx->cso);
 758
 759    /* viewport */
 760    ctx->viewport.scale[0] = 0.5f * dst->width;
 761    ctx->viewport.scale[1] = 0.5f * dst->height;
 762    ctx->viewport.scale[2] = 0.5f;
 763    ctx->viewport.scale[3] = 1.0f;
 764    ctx->viewport.translate[0] = 0.5f * dst->width;
 765    ctx->viewport.translate[1] = 0.5f * dst->height;
 766    ctx->viewport.translate[2] = 0.5f;
 767    ctx->viewport.translate[3] = 0.0f;
 768    cso_set_viewport(ctx->cso, &ctx->viewport);
 769
 770    /* texture */
 771    cso_set_fragment_sampler_views(ctx->cso, 1, &src_sampler_view);
 772
 773    /* shaders */
 774    set_fragment_shader(ctx, TGSI_WRITEMASK_XYZW);
 775    set_vertex_shader(ctx);
 776    cso_set_geometry_shader_handle(ctx->cso, NULL);
 777
 778    /* drawing dest */
 779    memset(&fb, 0, sizeof(fb));
 780    fb.width = dst->width;
 781    fb.height = dst->height;
 782    fb.nr_cbufs = 1;
 783    fb.cbufs[0] = dst;
 784    cso_set_framebuffer(ctx->cso, &fb);
 785
 786    /* draw quad */
 787    offset = setup_vertex_data_tex(ctx,
 788                                   (float) dstX0 / dst->width * 2.0f - 1.0f,
 789                                   (float) dstY0 / dst->height * 2.0f - 1.0f,
 790                                   (float) dstX1 / dst->width * 2.0f - 1.0f,
 791                                   (float) dstY1 / dst->height * 2.0f - 1.0f,
 792                                   s0, t0, s1, t1,
 793                                   z);
 794
 795    util_draw_vertex_buffer(ctx->pipe, ctx->cso,
 796                            ctx->vbuf, offset,
 797                            PIPE_PRIM_TRIANGLE_FAN,
 798                            4,  /* verts */
 799                            2); /* attribs/vert */
 800
 801    /* restore state we changed */
 802    cso_restore_blend(ctx->cso);
 803    cso_restore_depth_stencil_alpha(ctx->cso);
 804    cso_restore_rasterizer(ctx->cso);
 805    cso_restore_samplers(ctx->cso);
 806    cso_restore_fragment_sampler_views(ctx->cso);
 807    cso_restore_viewport(ctx->cso);
 808    cso_restore_framebuffer(ctx->cso);
 809    cso_restore_fragment_shader(ctx->cso);
 810    cso_restore_vertex_shader(ctx->cso);
 811    cso_restore_geometry_shader(ctx->cso);
 812    cso_restore_vertex_elements(ctx->cso);
 813    cso_restore_vertex_buffers(ctx->cso);
 814    cso_restore_stream_outputs(ctx->cso);
 815 }