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