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_write_color, blend_keep_color;
  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[PIPE_MAX_TEXTURE_TYPES][TGSI_WRITEMASK_XYZW + 1];
  70    void *fs_depth[PIPE_MAX_TEXTURE_TYPES];
  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    ctx->blend_write_color.rt[0].colormask = PIPE_MASK_RGBA;
  98
  99    /* no-op depth/stencil/alpha */
 100    ctx->depthstencil_write.depth.enabled = 1;
 101    ctx->depthstencil_write.depth.writemask = 1;
 102    ctx->depthstencil_write.depth.func = PIPE_FUNC_ALWAYS;
 103
 104    /* rasterizer */
 105    ctx->rasterizer.cull_face = PIPE_FACE_NONE;
 106    ctx->rasterizer.gl_rasterization_rules = 1;
 107    ctx->rasterizer.depth_clip = 1;
 108
 109    /* samplers */
 110    ctx->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 111    ctx->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 112    ctx->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 113    ctx->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 114    ctx->sampler.min_img_filter = 0; /* set later */
 115    ctx->sampler.mag_img_filter = 0; /* set later */
 116
 117    /* vertex elements state */
 118    for (i = 0; i < 2; i++) {
 119       ctx->velem[i].src_offset = i * 4 * sizeof(float);
 120       ctx->velem[i].instance_divisor = 0;
 121       ctx->velem[i].vertex_buffer_index = 0;
 122       ctx->velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 123    }
 124
 125    ctx->vbuf = NULL;
 126
 127    /* init vertex data that doesn't change */
 128    for (i = 0; i < 4; i++) {
 129       ctx->vertices[i][0][3] = 1.0f; /* w */
 130       ctx->vertices[i][1][2] = 0.0f; /* r */
 131       ctx->vertices[i][1][3] = 1.0f; /* q */
 132    }
 133
 134    if(pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 135       ctx->internal_target = PIPE_TEXTURE_2D;
 136    else
 137       ctx->internal_target = PIPE_TEXTURE_RECT;
 138
 139    return ctx;
 140 }
 141
 142
 143 /**
 144  * Destroy a blit context
 145  */
 146 void
 147 util_destroy_blit(struct blit_state *ctx)
 148 {
 149    struct pipe_context *pipe = ctx->pipe;
 150    unsigned i, j;
 151
 152    if (ctx->vs)
 153       pipe->delete_vs_state(pipe, ctx->vs);
 154
 155    for (i = 0; i < Elements(ctx->fs); i++) {
 156       for (j = 0; j < Elements(ctx->fs[i]); j++) {
 157          if (ctx->fs[i][j])
 158             pipe->delete_fs_state(pipe, ctx->fs[i][j]);
 159       }
 160    }
 161
 162    for (i = 0; i < Elements(ctx->fs_depth); i++) {
 163       if (ctx->fs_depth[i]) {
 164          pipe->delete_fs_state(pipe, ctx->fs_depth[i]);
 165       }
 166    }
 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                     enum pipe_texture_target pipe_tex)
 180 {
 181    if (!ctx->fs[pipe_tex][writemask]) {
 182       unsigned tgsi_tex = util_pipe_tex_to_tgsi_tex(pipe_tex);
 183
 184       ctx->fs[pipe_tex][writemask] =
 185          util_make_fragment_tex_shader_writemask(ctx->pipe, tgsi_tex,
 186                                                  TGSI_INTERPOLATE_LINEAR,
 187                                                  writemask);
 188    }
 189
 190    cso_set_fragment_shader_handle(ctx->cso, ctx->fs[pipe_tex][writemask]);
 191 }
 192
 193
 194 /**
 195  * Helper function to set the depthwrite shader.
 196  */
 197 static INLINE void
 198 set_depth_fragment_shader(struct blit_state *ctx,
 199                           enum pipe_texture_target pipe_tex)
 200 {
 201    if (!ctx->fs_depth[pipe_tex]) {
 202       unsigned tgsi_tex = util_pipe_tex_to_tgsi_tex(pipe_tex);
 203
 204       ctx->fs_depth[pipe_tex] =
 205          util_make_fragment_tex_shader_writedepth(ctx->pipe, tgsi_tex,
 206                                                   TGSI_INTERPOLATE_LINEAR);
 207    }
 208
 209    cso_set_fragment_shader_handle(ctx->cso, ctx->fs_depth[pipe_tex]);
 210 }
 211
 212
 213 /**
 214  * Helper function to set the vertex shader.
 215  */
 216 static INLINE void
 217 set_vertex_shader(struct blit_state *ctx)
 218 {
 219    /* vertex shader - still required to provide the linkage between
 220     * fragment shader input semantics and vertex_element/buffers.
 221     */
 222    if (!ctx->vs) {
 223       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 224                                       TGSI_SEMANTIC_GENERIC };
 225       const uint semantic_indexes[] = { 0, 0 };
 226       ctx->vs = util_make_vertex_passthrough_shader(ctx->pipe, 2,
 227                                                     semantic_names,
 228                                                     semantic_indexes);
 229    }
 230
 231    cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
 232 }
 233
 234
 235 /**
 236  * Get offset of next free slot in vertex buffer for quad vertices.
 237  */
 238 static unsigned
 239 get_next_slot( struct blit_state *ctx )
 240 {
 241    const unsigned max_slots = 4096 / sizeof ctx->vertices;
 242
 243    if (ctx->vbuf_slot >= max_slots) {
 244       pipe_resource_reference(&ctx->vbuf, NULL);
 245       ctx->vbuf_slot = 0;
 246    }
 247
 248    if (!ctx->vbuf) {
 249       ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
 250                                      PIPE_BIND_VERTEX_BUFFER,
 251                                      PIPE_USAGE_STREAM,
 252                                      max_slots * sizeof ctx->vertices);
 253    }
 254
 255    return ctx->vbuf_slot++ * sizeof ctx->vertices;
 256 }
 257
 258
 259
 260
 261 /**
 262  * Setup vertex data for the textured quad we'll draw.
 263  * Note: y=0=top
 264  */
 265 static unsigned
 266 setup_vertex_data_tex(struct blit_state *ctx,
 267                       float x0, float y0, float x1, float y1,
 268                       float s0, float t0, float s1, float t1,
 269                       float z)
 270 {
 271    unsigned offset;
 272
 273    ctx->vertices[0][0][0] = x0;
 274    ctx->vertices[0][0][1] = y0;
 275    ctx->vertices[0][0][2] = z;
 276    ctx->vertices[0][1][0] = s0; /*s*/
 277    ctx->vertices[0][1][1] = t0; /*t*/
 278
 279    ctx->vertices[1][0][0] = x1;
 280    ctx->vertices[1][0][1] = y0;
 281    ctx->vertices[1][0][2] = z;
 282    ctx->vertices[1][1][0] = s1; /*s*/
 283    ctx->vertices[1][1][1] = t0; /*t*/
 284
 285    ctx->vertices[2][0][0] = x1;
 286    ctx->vertices[2][0][1] = y1;
 287    ctx->vertices[2][0][2] = z;
 288    ctx->vertices[2][1][0] = s1;
 289    ctx->vertices[2][1][1] = t1;
 290
 291    ctx->vertices[3][0][0] = x0;
 292    ctx->vertices[3][0][1] = y1;
 293    ctx->vertices[3][0][2] = z;
 294    ctx->vertices[3][1][0] = s0;
 295    ctx->vertices[3][1][1] = t1;
 296
 297    offset = get_next_slot( ctx );
 298
 299    if (ctx->vbuf) {
 300       pipe_buffer_write_nooverlap(ctx->pipe, ctx->vbuf,
 301                                   offset, sizeof(ctx->vertices), ctx->vertices);
 302    }
 303
 304    return offset;
 305 }
 306
 307
 308 /**
 309  * \return TRUE if two regions overlap, FALSE otherwise
 310  */
 311 static boolean
 312 regions_overlap(int srcX0, int srcY0,
 313                 int srcX1, int srcY1,
 314                 int dstX0, int dstY0,
 315                 int dstX1, int dstY1)
 316 {
 317    if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1))
 318       return FALSE; /* src completely left of dst */
 319
 320    if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))
 321       return FALSE; /* dst completely left of src */
 322
 323    if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))
 324       return FALSE; /* src completely above dst */
 325
 326    if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))
 327       return FALSE; /* dst completely above src */
 328
 329    return TRUE; /* some overlap */
 330 }
 331
 332
 333 /**
 334  * Can we blit from src format to dest format with a simple copy?
 335  */
 336 static boolean
 337 formats_compatible(enum pipe_format src_format,
 338                    enum pipe_format dst_format)
 339 {
 340    if (src_format == dst_format) {
 341       return TRUE;
 342    }
 343    else {
 344       const struct util_format_description *src_desc =
 345          util_format_description(src_format);
 346       const struct util_format_description *dst_desc =
 347          util_format_description(dst_format);
 348       return util_is_format_compatible(src_desc, dst_desc);
 349    }
 350 }
 351
 352
 353 /**
 354  * Copy pixel block from src surface to dst surface.
 355  * Overlapping regions are acceptable.
 356  * Flipping and stretching are supported.
 357  * \param filter  one of PIPE_TEX_MIPFILTER_NEAREST/LINEAR
 358  * \param writemask  controls which channels in the dest surface are sourced
 359  *                   from the src surface.  Disabled channels are sourced
 360  *                   from (0,0,0,1).
 361  * XXX need some control over blitting stencil.
 362  */
 363 void
 364 util_blit_pixels(struct blit_state *ctx,
 365                  struct pipe_resource *src_tex,
 366                  unsigned src_level,
 367                  int srcX0, int srcY0,
 368                  int srcX1, int srcY1,
 369                  int srcZ0,
 370                  struct pipe_surface *dst,
 371                  int dstX0, int dstY0,
 372                  int dstX1, int dstY1,
 373                  float z, uint filter,
 374                  uint writemask)
 375 {
 376    struct pipe_context *pipe = ctx->pipe;
 377    struct pipe_screen *screen = pipe->screen;
 378    enum pipe_format src_format, dst_format;
 379    struct pipe_sampler_view *sampler_view = NULL;
 380    struct pipe_sampler_view sv_templ;
 381    struct pipe_surface *dst_surface;
 382    struct pipe_framebuffer_state fb;
 383    const int srcW = abs(srcX1 - srcX0);
 384    const int srcH = abs(srcY1 - srcY0);
 385    unsigned offset;
 386    boolean overlap, dst_is_depth;
 387    float s0, t0, s1, t1;
 388    boolean normalized;
 389
 390    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 391           filter == PIPE_TEX_MIPFILTER_LINEAR);
 392
 393    assert(src_level <= src_tex->last_level);
 394
 395    /* do the regions overlap? */
 396    overlap = src_tex == dst->texture &&
 397              dst->u.tex.level == src_level &&
 398              dst->u.tex.first_layer == srcZ0 &&
 399       regions_overlap(srcX0, srcY0, srcX1, srcY1,
 400                       dstX0, dstY0, dstX1, dstY1);
 401
 402    src_format = util_format_linear(src_tex->format);
 403    dst_format = util_format_linear(dst->format);
 404
 405    /*
 406     * Check for simple case:  no format conversion, no flipping, no stretching,
 407     * no overlapping.
 408     * Filter mode should not matter since there's no stretching.
 409     */
 410    if (formats_compatible(src_format, dst_format) &&
 411        srcX0 < srcX1 &&
 412        dstX0 < dstX1 &&
 413        srcY0 < srcY1 &&
 414        dstY0 < dstY1 &&
 415        (dstX1 - dstX0) == (srcX1 - srcX0) &&
 416        (dstY1 - dstY0) == (srcY1 - srcY0) &&
 417        !overlap) {
 418       struct pipe_box src_box;
 419       src_box.x = srcX0;
 420       src_box.y = srcY0;
 421       src_box.z = srcZ0;
 422       src_box.width = srcW;
 423       src_box.height = srcH;
 424       src_box.depth = 1;
 425       pipe->resource_copy_region(pipe,
 426                                  dst->texture, dst->u.tex.level,
 427                                  dstX0, dstY0, dst->u.tex.first_layer,/* dest */
 428                                  src_tex, src_level,
 429                                  &src_box);
 430       return;
 431    }
 432
 433    if (dst_format == dst->format) {
 434       dst_surface = dst;
 435    } else {
 436       struct pipe_surface templ = *dst;
 437       templ.format = dst_format;
 438       dst_surface = pipe->create_surface(pipe, dst->texture, &templ);
 439    }
 440
 441    /* Create a temporary texture when src and dest alias.
 442     */
 443    if (src_tex == dst_surface->texture &&
 444        dst_surface->u.tex.level == src_level &&
 445        dst_surface->u.tex.first_layer == srcZ0) {
 446       /* Make a temporary texture which contains a copy of the source pixels.
 447        * Then we'll sample from the temporary texture.
 448        */
 449       struct pipe_resource texTemp;
 450       struct pipe_resource *tex;
 451       struct pipe_sampler_view sv_templ;
 452       struct pipe_box src_box;
 453       const int srcLeft = MIN2(srcX0, srcX1);
 454       const int srcTop = MIN2(srcY0, srcY1);
 455
 456       if (srcLeft != srcX0) {
 457          /* left-right flip */
 458          int tmp = dstX0;
 459          dstX0 = dstX1;
 460          dstX1 = tmp;
 461       }
 462
 463       if (srcTop != srcY0) {
 464          /* up-down flip */
 465          int tmp = dstY0;
 466          dstY0 = dstY1;
 467          dstY1 = tmp;
 468       }
 469
 470       /* create temp texture */
 471       memset(&texTemp, 0, sizeof(texTemp));
 472       texTemp.target = ctx->internal_target;
 473       texTemp.format = src_format;
 474       texTemp.last_level = 0;
 475       texTemp.width0 = srcW;
 476       texTemp.height0 = srcH;
 477       texTemp.depth0 = 1;
 478       texTemp.array_size = 1;
 479       texTemp.bind = PIPE_BIND_SAMPLER_VIEW;
 480
 481       tex = screen->resource_create(screen, &texTemp);
 482       if (!tex)
 483          return;
 484
 485       src_box.x = srcLeft;
 486       src_box.y = srcTop;
 487       src_box.z = srcZ0;
 488       src_box.width = srcW;
 489       src_box.height = srcH;
 490       src_box.depth = 1;
 491       /* load temp texture */
 492       pipe->resource_copy_region(pipe,
 493                                  tex, 0, 0, 0, 0,  /* dest */
 494                                  src_tex, src_level, &src_box);
 495
 496       normalized = tex->target != PIPE_TEXTURE_RECT;
 497       if(normalized) {
 498          s0 = 0.0f;
 499          s1 = 1.0f;
 500          t0 = 0.0f;
 501          t1 = 1.0f;
 502       }
 503       else {
 504          s0 = 0;
 505          s1 = srcW;
 506          t0 = 0;
 507          t1 = srcH;
 508       }
 509
 510       u_sampler_view_default_template(&sv_templ, tex, tex->format);
 511       sampler_view = pipe->create_sampler_view(pipe, tex, &sv_templ);
 512
 513       if (!sampler_view) {
 514          pipe_resource_reference(&tex, NULL);
 515          return;
 516       }
 517       pipe_resource_reference(&tex, NULL);
 518    }
 519    else {
 520       /* Directly sample from the source resource/texture */
 521       u_sampler_view_default_template(&sv_templ, src_tex, src_format);
 522       sampler_view = pipe->create_sampler_view(pipe, src_tex, &sv_templ);
 523
 524       if (!sampler_view) {
 525          return;
 526       }
 527
 528       s0 = srcX0;
 529       s1 = srcX1;
 530       t0 = srcY0;
 531       t1 = srcY1;
 532       normalized = sampler_view->texture->target != PIPE_TEXTURE_RECT;
 533       if(normalized)
 534       {
 535          s0 /= (float)(u_minify(sampler_view->texture->width0, src_level));
 536          s1 /= (float)(u_minify(sampler_view->texture->width0, src_level));
 537          t0 /= (float)(u_minify(sampler_view->texture->height0, src_level));
 538          t1 /= (float)(u_minify(sampler_view->texture->height0, src_level));
 539       }
 540    }
 541
 542    dst_is_depth = util_format_is_depth_or_stencil(dst_format);
 543
 544    assert(screen->is_format_supported(screen, sampler_view->format, ctx->internal_target,
 545                                       sampler_view->texture->nr_samples,
 546                                       PIPE_BIND_SAMPLER_VIEW));
 547    assert(screen->is_format_supported(screen, dst_format, ctx->internal_target,
 548                                       dst_surface->texture->nr_samples,
 549                                       dst_is_depth ? PIPE_BIND_DEPTH_STENCIL :
 550                                                      PIPE_BIND_RENDER_TARGET));
 551    /* save state (restored below) */
 552    cso_save_blend(ctx->cso);
 553    cso_save_depth_stencil_alpha(ctx->cso);
 554    cso_save_rasterizer(ctx->cso);
 555    cso_save_samplers(ctx->cso);
 556    cso_save_fragment_sampler_views(ctx->cso);
 557    cso_save_stream_outputs(ctx->cso);
 558    cso_save_viewport(ctx->cso);
 559    cso_save_framebuffer(ctx->cso);
 560    cso_save_fragment_shader(ctx->cso);
 561    cso_save_vertex_shader(ctx->cso);
 562    cso_save_geometry_shader(ctx->cso);
 563    cso_save_vertex_elements(ctx->cso);
 564    cso_save_vertex_buffers(ctx->cso);
 565
 566    /* set misc state we care about */
 567    if (writemask)
 568       cso_set_blend(ctx->cso, &ctx->blend_write_color);
 569    else
 570       cso_set_blend(ctx->cso, &ctx->blend_keep_color);
 571
 572    cso_set_depth_stencil_alpha(ctx->cso,
 573                                dst_is_depth ? &ctx->depthstencil_write :
 574                                               &ctx->depthstencil_keep);
 575    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 576    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
 577    cso_set_stream_outputs(ctx->cso, 0, NULL, 0);
 578
 579    /* sampler */
 580    ctx->sampler.normalized_coords = normalized;
 581    ctx->sampler.min_img_filter = filter;
 582    ctx->sampler.mag_img_filter = filter;
 583    ctx->sampler.min_lod = src_level;
 584    ctx->sampler.max_lod = src_level;
 585    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 586    cso_single_sampler_done(ctx->cso);
 587
 588    /* viewport */
 589    ctx->viewport.scale[0] = 0.5f * dst_surface->width;
 590    ctx->viewport.scale[1] = 0.5f * dst_surface->height;
 591    ctx->viewport.scale[2] = 0.5f;
 592    ctx->viewport.scale[3] = 1.0f;
 593    ctx->viewport.translate[0] = 0.5f * dst_surface->width;
 594    ctx->viewport.translate[1] = 0.5f * dst_surface->height;
 595    ctx->viewport.translate[2] = 0.5f;
 596    ctx->viewport.translate[3] = 0.0f;
 597    cso_set_viewport(ctx->cso, &ctx->viewport);
 598
 599    /* texture */
 600    cso_set_fragment_sampler_views(ctx->cso, 1, &sampler_view);
 601
 602    /* shaders */
 603    if (dst_is_depth) {
 604       set_depth_fragment_shader(ctx, sampler_view->texture->target);
 605    } else {
 606       set_fragment_shader(ctx, writemask, sampler_view->texture->target);
 607    }
 608    set_vertex_shader(ctx);
 609    cso_set_geometry_shader_handle(ctx->cso, NULL);
 610
 611    /* drawing dest */
 612    memset(&fb, 0, sizeof(fb));
 613    fb.width = dst_surface->width;
 614    fb.height = dst_surface->height;
 615    if (dst_is_depth) {
 616       fb.zsbuf = dst_surface;
 617    } else {
 618       fb.nr_cbufs = 1;
 619       fb.cbufs[0] = dst_surface;
 620    }
 621    cso_set_framebuffer(ctx->cso, &fb);
 622
 623    /* draw quad */
 624    offset = setup_vertex_data_tex(ctx,
 625                                   (float) dstX0 / dst_surface->width * 2.0f - 1.0f,
 626                                   (float) dstY0 / dst_surface->height * 2.0f - 1.0f,
 627                                   (float) dstX1 / dst_surface->width * 2.0f - 1.0f,
 628                                   (float) dstY1 / dst_surface->height * 2.0f - 1.0f,
 629                                   s0, t0,
 630                                   s1, t1,
 631                                   z);
 632
 633    if (ctx->vbuf) {
 634       util_draw_vertex_buffer(ctx->pipe, ctx->cso, ctx->vbuf, offset,
 635                               PIPE_PRIM_TRIANGLE_FAN,
 636                               4,  /* verts */
 637                               2); /* attribs/vert */
 638    }
 639
 640    /* restore state we changed */
 641    cso_restore_blend(ctx->cso);
 642    cso_restore_depth_stencil_alpha(ctx->cso);
 643    cso_restore_rasterizer(ctx->cso);
 644    cso_restore_samplers(ctx->cso);
 645    cso_restore_fragment_sampler_views(ctx->cso);
 646    cso_restore_viewport(ctx->cso);
 647    cso_restore_framebuffer(ctx->cso);
 648    cso_restore_fragment_shader(ctx->cso);
 649    cso_restore_vertex_shader(ctx->cso);
 650    cso_restore_geometry_shader(ctx->cso);
 651    cso_restore_vertex_elements(ctx->cso);
 652    cso_restore_vertex_buffers(ctx->cso);
 653    cso_restore_stream_outputs(ctx->cso);
 654
 655    pipe_sampler_view_reference(&sampler_view, NULL);
 656    if (dst_surface != dst)
 657       pipe_surface_reference(&dst_surface, NULL);
 658 }
 659
 660
 661 /**
 662  * Copy pixel block from src texture to dst surface.
 663  * The sampler view's first_level field indicates the source
 664  * mipmap level to use.
 665  * XXX need some control over blitting Z and/or stencil.
 666  */
 667 void
 668 util_blit_pixels_tex(struct blit_state *ctx,
 669                      struct pipe_sampler_view *src_sampler_view,
 670                      int srcX0, int srcY0,
 671                      int srcX1, int srcY1,
 672                      struct pipe_surface *dst,
 673                      int dstX0, int dstY0,
 674                      int dstX1, int dstY1,
 675                      float z, uint filter)
 676 {
 677    boolean normalized = src_sampler_view->texture->target != PIPE_TEXTURE_RECT;
 678    struct pipe_framebuffer_state fb;
 679    float s0, t0, s1, t1;
 680    unsigned offset;
 681    struct pipe_resource *tex = src_sampler_view->texture;
 682
 683    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 684           filter == PIPE_TEX_MIPFILTER_LINEAR);
 685
 686    assert(tex);
 687    assert(tex->width0 != 0);
 688    assert(tex->height0 != 0);
 689
 690    s0 = srcX0;
 691    s1 = srcX1;
 692    t0 = srcY0;
 693    t1 = srcY1;
 694
 695    if(normalized)
 696    {
 697       /* normalize according to the mipmap level's size */
 698       int level = src_sampler_view->u.tex.first_level;
 699       float w = (float) u_minify(tex->width0, level);
 700       float h = (float) u_minify(tex->height0, level);
 701       s0 /= w;
 702       s1 /= w;
 703       t0 /= h;
 704       t1 /= h;
 705    }
 706
 707    assert(ctx->pipe->screen->is_format_supported(ctx->pipe->screen, dst->format,
 708                                                  PIPE_TEXTURE_2D,
 709                                                  dst->texture->nr_samples,
 710                                                  PIPE_BIND_RENDER_TARGET));
 711
 712    /* save state (restored below) */
 713    cso_save_blend(ctx->cso);
 714    cso_save_depth_stencil_alpha(ctx->cso);
 715    cso_save_rasterizer(ctx->cso);
 716    cso_save_samplers(ctx->cso);
 717    cso_save_fragment_sampler_views(ctx->cso);
 718    cso_save_stream_outputs(ctx->cso);
 719    cso_save_viewport(ctx->cso);
 720    cso_save_framebuffer(ctx->cso);
 721    cso_save_fragment_shader(ctx->cso);
 722    cso_save_vertex_shader(ctx->cso);
 723    cso_save_geometry_shader(ctx->cso);
 724    cso_save_vertex_elements(ctx->cso);
 725    cso_save_vertex_buffers(ctx->cso);
 726
 727    /* set misc state we care about */
 728    cso_set_blend(ctx->cso, &ctx->blend_write_color);
 729    cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil_keep);
 730    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 731    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
 732    cso_set_stream_outputs(ctx->cso, 0, NULL, 0);
 733
 734    /* sampler */
 735    ctx->sampler.normalized_coords = normalized;
 736    ctx->sampler.min_img_filter = filter;
 737    ctx->sampler.mag_img_filter = filter;
 738    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 739    cso_single_sampler_done(ctx->cso);
 740
 741    /* viewport */
 742    ctx->viewport.scale[0] = 0.5f * dst->width;
 743    ctx->viewport.scale[1] = 0.5f * dst->height;
 744    ctx->viewport.scale[2] = 0.5f;
 745    ctx->viewport.scale[3] = 1.0f;
 746    ctx->viewport.translate[0] = 0.5f * dst->width;
 747    ctx->viewport.translate[1] = 0.5f * dst->height;
 748    ctx->viewport.translate[2] = 0.5f;
 749    ctx->viewport.translate[3] = 0.0f;
 750    cso_set_viewport(ctx->cso, &ctx->viewport);
 751
 752    /* texture */
 753    cso_set_fragment_sampler_views(ctx->cso, 1, &src_sampler_view);
 754
 755    /* shaders */
 756    set_fragment_shader(ctx, TGSI_WRITEMASK_XYZW,
 757                        src_sampler_view->texture->target);
 758    set_vertex_shader(ctx);
 759    cso_set_geometry_shader_handle(ctx->cso, NULL);
 760
 761    /* drawing dest */
 762    memset(&fb, 0, sizeof(fb));
 763    fb.width = dst->width;
 764    fb.height = dst->height;
 765    fb.nr_cbufs = 1;
 766    fb.cbufs[0] = dst;
 767    cso_set_framebuffer(ctx->cso, &fb);
 768
 769    /* draw quad */
 770    offset = setup_vertex_data_tex(ctx,
 771                                   (float) dstX0 / dst->width * 2.0f - 1.0f,
 772                                   (float) dstY0 / dst->height * 2.0f - 1.0f,
 773                                   (float) dstX1 / dst->width * 2.0f - 1.0f,
 774                                   (float) dstY1 / dst->height * 2.0f - 1.0f,
 775                                   s0, t0, s1, t1,
 776                                   z);
 777
 778    util_draw_vertex_buffer(ctx->pipe, ctx->cso,
 779                            ctx->vbuf, offset,
 780                            PIPE_PRIM_TRIANGLE_FAN,
 781                            4,  /* verts */
 782                            2); /* attribs/vert */
 783
 784    /* restore state we changed */
 785    cso_restore_blend(ctx->cso);
 786    cso_restore_depth_stencil_alpha(ctx->cso);
 787    cso_restore_rasterizer(ctx->cso);
 788    cso_restore_samplers(ctx->cso);
 789    cso_restore_fragment_sampler_views(ctx->cso);
 790    cso_restore_viewport(ctx->cso);
 791    cso_restore_framebuffer(ctx->cso);
 792    cso_restore_fragment_shader(ctx->cso);
 793    cso_restore_vertex_shader(ctx->cso);
 794    cso_restore_geometry_shader(ctx->cso);
 795    cso_restore_vertex_elements(ctx->cso);
 796    cso_restore_vertex_buffers(ctx->cso);
 797    cso_restore_stream_outputs(ctx->cso);
 798 }