src/gallium/auxiliary/util/u_blit.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * @file
  30  * Copy/blit pixel rect between surfaces
  31  *
  32  * @author Brian Paul
  33  */
  34
  35
  36 #include "pipe/p_context.h"
  37 #include "util/u_debug.h"
  38 #include "pipe/p_defines.h"
  39 #include "util/u_inlines.h"
  40 #include "pipe/p_shader_tokens.h"
  41 #include "pipe/p_state.h"
  42
  43 #include "util/u_blit.h"
  44 #include "util/u_draw_quad.h"
  45 #include "util/u_format.h"
  46 #include "util/u_math.h"
  47 #include "util/u_memory.h"
  48 #include "util/u_sampler.h"
  49 #include "util/u_simple_shaders.h"
  50
  51 #include "cso_cache/cso_context.h"
  52
  53
  54 struct blit_state
  55 {
  56    struct pipe_context *pipe;
  57    struct cso_context *cso;
  58
  59    struct pipe_blend_state blend;
  60    struct pipe_depth_stencil_alpha_state depthstencil_keep;
  61    struct pipe_depth_stencil_alpha_state depthstencil_write;
  62    struct pipe_rasterizer_state rasterizer;
  63    struct pipe_sampler_state sampler;
  64    struct pipe_viewport_state viewport;
  65    struct pipe_clip_state clip;
  66    struct pipe_vertex_element velem[2];
  67    enum pipe_texture_target internal_target;
  68
  69    void *vs;
  70    void *fs[TGSI_WRITEMASK_XYZW + 1];
  71    void *fs_depth;
  72
  73    struct pipe_resource *vbuf;  /**< quad vertices */
  74    unsigned vbuf_slot;
  75
  76    float vertices[4][2][4];   /**< vertex/texcoords for quad */
  77 };
  78
  79
  80 /**
  81  * Create state object for blit.
  82  * Intended to be created once and re-used for many blit() calls.
  83  */
  84 struct blit_state *
  85 util_create_blit(struct pipe_context *pipe, struct cso_context *cso)
  86 {
  87    struct blit_state *ctx;
  88    uint i;
  89
  90    ctx = CALLOC_STRUCT(blit_state);
  91    if (!ctx)
  92       return NULL;
  93
  94    ctx->pipe = pipe;
  95    ctx->cso = cso;
  96
  97    /* disabled blending/masking */
  98    memset(&ctx->blend, 0, sizeof(ctx->blend));
  99    ctx->blend.rt[0].colormask = PIPE_MASK_RGBA;
 100
 101    /* no-op depth/stencil/alpha */
 102    memset(&ctx->depthstencil_keep, 0, sizeof(ctx->depthstencil_keep));
 103    memset(&ctx->depthstencil_write, 0, sizeof(ctx->depthstencil_write));
 104    ctx->depthstencil_write.depth.enabled = 1;
 105    ctx->depthstencil_write.depth.writemask = 1;
 106    ctx->depthstencil_write.depth.func = PIPE_FUNC_ALWAYS;
 107
 108    /* rasterizer */
 109    memset(&ctx->rasterizer, 0, sizeof(ctx->rasterizer));
 110    ctx->rasterizer.cull_face = PIPE_FACE_NONE;
 111    ctx->rasterizer.gl_rasterization_rules = 1;
 112
 113    /* samplers */
 114    memset(&ctx->sampler, 0, sizeof(ctx->sampler));
 115    ctx->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 116    ctx->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 117    ctx->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 118    ctx->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 119    ctx->sampler.min_img_filter = 0; /* set later */
 120    ctx->sampler.mag_img_filter = 0; /* set later */
 121
 122    /* vertex elements state */
 123    memset(&ctx->velem[0], 0, sizeof(ctx->velem[0]) * 2);
 124    for (i = 0; i < 2; i++) {
 125       ctx->velem[i].src_offset = i * 4 * sizeof(float);
 126       ctx->velem[i].instance_divisor = 0;
 127       ctx->velem[i].vertex_buffer_index = 0;
 128       ctx->velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 129    }
 130
 131    /* vertex shader - still required to provide the linkage between
 132     * fragment shader input semantics and vertex_element/buffers.
 133     */
 134    {
 135       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 136                                       TGSI_SEMANTIC_GENERIC };
 137       const uint semantic_indexes[] = { 0, 0 };
 138       ctx->vs = util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 139                                                     semantic_indexes);
 140    }
 141
 142    /* fragment shader */
 143    ctx->fs[TGSI_WRITEMASK_XYZW] =
 144       util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D,
 145                                     TGSI_INTERPOLATE_LINEAR);
 146    ctx->vbuf = NULL;
 147
 148    /* init vertex data that doesn't change */
 149    for (i = 0; i < 4; i++) {
 150       ctx->vertices[i][0][3] = 1.0f; /* w */
 151       ctx->vertices[i][1][2] = 0.0f; /* r */
 152       ctx->vertices[i][1][3] = 1.0f; /* q */
 153    }
 154
 155    if(pipe->screen->get_param(pipe->screen, PIPE_CAP_NPOT_TEXTURES))
 156       ctx->internal_target = PIPE_TEXTURE_2D;
 157    else
 158       ctx->internal_target = PIPE_TEXTURE_RECT;
 159
 160    return ctx;
 161 }
 162
 163
 164 /**
 165  * Destroy a blit context
 166  */
 167 void
 168 util_destroy_blit(struct blit_state *ctx)
 169 {
 170    struct pipe_context *pipe = ctx->pipe;
 171    unsigned i;
 172
 173    pipe->delete_vs_state(pipe, ctx->vs);
 174
 175    for (i = 0; i < Elements(ctx->fs); i++)
 176       if (ctx->fs[i])
 177          pipe->delete_fs_state(pipe, ctx->fs[i]);
 178
 179    if (ctx->fs_depth)
 180       pipe->delete_fs_state(pipe, ctx->fs_depth);
 181
 182    pipe_resource_reference(&ctx->vbuf, NULL);
 183
 184    FREE(ctx);
 185 }
 186
 187
 188 /**
 189  * Get offset of next free slot in vertex buffer for quad vertices.
 190  */
 191 static unsigned
 192 get_next_slot( struct blit_state *ctx )
 193 {
 194    const unsigned max_slots = 4096 / sizeof ctx->vertices;
 195
 196    if (ctx->vbuf_slot >= max_slots)
 197       util_blit_flush( ctx );
 198
 199    if (!ctx->vbuf) {
 200       ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
 201                                      PIPE_BIND_VERTEX_BUFFER,
 202                                      PIPE_USAGE_STREAM,
 203                                      max_slots * sizeof ctx->vertices);
 204    }
 205
 206    return ctx->vbuf_slot++ * sizeof ctx->vertices;
 207 }
 208
 209
 210
 211
 212 /**
 213  * Setup vertex data for the textured quad we'll draw.
 214  * Note: y=0=top
 215  */
 216 static unsigned
 217 setup_vertex_data_tex(struct blit_state *ctx,
 218                       float x0, float y0, float x1, float y1,
 219                       float s0, float t0, float s1, float t1,
 220                       float z)
 221 {
 222    unsigned offset;
 223
 224    ctx->vertices[0][0][0] = x0;
 225    ctx->vertices[0][0][1] = y0;
 226    ctx->vertices[0][0][2] = z;
 227    ctx->vertices[0][1][0] = s0; /*s*/
 228    ctx->vertices[0][1][1] = t0; /*t*/
 229
 230    ctx->vertices[1][0][0] = x1;
 231    ctx->vertices[1][0][1] = y0;
 232    ctx->vertices[1][0][2] = z;
 233    ctx->vertices[1][1][0] = s1; /*s*/
 234    ctx->vertices[1][1][1] = t0; /*t*/
 235
 236    ctx->vertices[2][0][0] = x1;
 237    ctx->vertices[2][0][1] = y1;
 238    ctx->vertices[2][0][2] = z;
 239    ctx->vertices[2][1][0] = s1;
 240    ctx->vertices[2][1][1] = t1;
 241
 242    ctx->vertices[3][0][0] = x0;
 243    ctx->vertices[3][0][1] = y1;
 244    ctx->vertices[3][0][2] = z;
 245    ctx->vertices[3][1][0] = s0;
 246    ctx->vertices[3][1][1] = t1;
 247
 248    offset = get_next_slot( ctx );
 249
 250    pipe_buffer_write_nooverlap(ctx->pipe, ctx->vbuf,
 251                                offset, sizeof(ctx->vertices), ctx->vertices);
 252
 253    return offset;
 254 }
 255
 256
 257 /**
 258  * \return TRUE if two regions overlap, FALSE otherwise
 259  */
 260 static boolean
 261 regions_overlap(int srcX0, int srcY0,
 262                 int srcX1, int srcY1,
 263                 int dstX0, int dstY0,
 264                 int dstX1, int dstY1)
 265 {
 266    if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1))
 267       return FALSE; /* src completely left of dst */
 268
 269    if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))
 270       return FALSE; /* dst completely left of src */
 271
 272    if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))
 273       return FALSE; /* src completely above dst */
 274
 275    if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))
 276       return FALSE; /* dst completely above src */
 277
 278    return TRUE; /* some overlap */
 279 }
 280
 281
 282 /**
 283  * Copy pixel block from src surface to dst surface.
 284  * Overlapping regions are acceptable.
 285  * Flipping and stretching are supported.
 286  * \param filter  one of PIPE_TEX_MIPFILTER_NEAREST/LINEAR
 287  * \param writemask  controls which channels in the dest surface are sourced
 288  *                   from the src surface.  Disabled channels are sourced
 289  *                   from (0,0,0,1).
 290  * XXX need some control over blitting stencil.
 291  */
 292 void
 293 util_blit_pixels_writemask(struct blit_state *ctx,
 294                            struct pipe_resource *src_tex,
 295                            unsigned src_level,
 296                            int srcX0, int srcY0,
 297                            int srcX1, int srcY1,
 298                            int srcZ0,
 299                            struct pipe_surface *dst,
 300                            int dstX0, int dstY0,
 301                            int dstX1, int dstY1,
 302                            float z, uint filter,
 303                            uint writemask)
 304 {
 305    struct pipe_context *pipe = ctx->pipe;
 306    struct pipe_screen *screen = pipe->screen;
 307    enum pipe_format src_format, dst_format;
 308    struct pipe_sampler_view *sampler_view = NULL;
 309    struct pipe_sampler_view sv_templ;
 310    struct pipe_surface *dst_surface;
 311    struct pipe_framebuffer_state fb;
 312    const int srcW = abs(srcX1 - srcX0);
 313    const int srcH = abs(srcY1 - srcY0);
 314    unsigned offset;
 315    boolean overlap, dst_is_depth;
 316    float s0, t0, s1, t1;
 317    boolean normalized;
 318
 319    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 320           filter == PIPE_TEX_MIPFILTER_LINEAR);
 321
 322    assert(src_level <= src_tex->last_level);
 323
 324    /* do the regions overlap? */
 325    overlap = src_tex == dst->texture &&
 326              dst->u.tex.level == src_level &&
 327              dst->u.tex.first_layer == srcZ0 &&
 328       regions_overlap(srcX0, srcY0, srcX1, srcY1,
 329                       dstX0, dstY0, dstX1, dstY1);
 330
 331    src_format = util_format_linear(src_tex->format);
 332    dst_format = util_format_linear(dst->format);
 333
 334    /*
 335     * Check for simple case:  no format conversion, no flipping, no stretching,
 336     * no overlapping.
 337     * Filter mode should not matter since there's no stretching.
 338     */
 339    if (dst_format == src_format &&
 340        srcX0 < srcX1 &&
 341        dstX0 < dstX1 &&
 342        srcY0 < srcY1 &&
 343        dstY0 < dstY1 &&
 344        (dstX1 - dstX0) == (srcX1 - srcX0) &&
 345        (dstY1 - dstY0) == (srcY1 - srcY0) &&
 346        !overlap) {
 347       struct pipe_box src_box;
 348       src_box.x = srcX0;
 349       src_box.y = srcY0;
 350       src_box.z = srcZ0;
 351       src_box.width = srcW;
 352       src_box.height = srcH;
 353       src_box.depth = 1;
 354       pipe->resource_copy_region(pipe,
 355                                  dst->texture, dst->u.tex.level,
 356                                  dstX0, dstY0, dst->u.tex.first_layer,/* dest */
 357                                  src_tex, src_level,
 358                                  &src_box);
 359        return;
 360    }
 361
 362    if (dst_format == dst->format) {
 363       dst_surface = dst;
 364    } else {
 365       struct pipe_surface templ = *dst;
 366       templ.format = dst_format;
 367       dst_surface = pipe->create_surface(pipe, dst->texture, &templ);
 368    }
 369
 370    /* Create a temporary texture when src and dest alias or when src
 371     * is anything other than a 2d texture.
 372     * XXX should just use appropriate shader to access 1d / 3d slice / cube face,
 373     * much like the u_blitter code does (should be pretty trivial).
 374     *
 375     * This can still be improved upon.
 376     */
 377    if ((src_tex == dst_surface->texture &&
 378        dst_surface->u.tex.level == src_level &&
 379        dst_surface->u.tex.first_layer == srcZ0) ||
 380        (src_tex->target != PIPE_TEXTURE_2D &&
 381        src_tex->target != PIPE_TEXTURE_2D &&
 382        src_tex->target != PIPE_TEXTURE_RECT))
 383    {
 384       struct pipe_resource texTemp;
 385       struct pipe_resource *tex;
 386       struct pipe_sampler_view sv_templ;
 387       struct pipe_box src_box;
 388       const int srcLeft = MIN2(srcX0, srcX1);
 389       const int srcTop = MIN2(srcY0, srcY1);
 390
 391       if (srcLeft != srcX0) {
 392          /* left-right flip */
 393          int tmp = dstX0;
 394          dstX0 = dstX1;
 395          dstX1 = tmp;
 396       }
 397
 398       if (srcTop != srcY0) {
 399          /* up-down flip */
 400          int tmp = dstY0;
 401          dstY0 = dstY1;
 402          dstY1 = tmp;
 403       }
 404
 405       /* create temp texture */
 406       memset(&texTemp, 0, sizeof(texTemp));
 407       texTemp.target = ctx->internal_target;
 408       texTemp.format = src_format;
 409       texTemp.last_level = 0;
 410       texTemp.width0 = srcW;
 411       texTemp.height0 = srcH;
 412       texTemp.depth0 = 1;
 413       texTemp.array_size = 1;
 414       texTemp.bind = PIPE_BIND_SAMPLER_VIEW;
 415
 416       tex = screen->resource_create(screen, &texTemp);
 417       if (!tex)
 418          return;
 419
 420       src_box.x = srcLeft;
 421       src_box.y = srcTop;
 422       src_box.z = srcZ0;
 423       src_box.width = srcW;
 424       src_box.height = srcH;
 425       src_box.depth = 1;
 426       /* load temp texture */
 427       pipe->resource_copy_region(pipe,
 428                                  tex, 0, 0, 0, 0,  /* dest */
 429                                  src_tex, src_level, &src_box);
 430
 431       normalized = tex->target != PIPE_TEXTURE_RECT;
 432       if(normalized) {
 433          s0 = 0.0f;
 434          s1 = 1.0f;
 435          t0 = 0.0f;
 436          t1 = 1.0f;
 437       }
 438       else {
 439          s0 = 0;
 440          s1 = srcW;
 441          t0 = 0;
 442          t1 = srcH;
 443       }
 444
 445       u_sampler_view_default_template(&sv_templ, tex, tex->format);
 446       sampler_view = pipe->create_sampler_view(pipe, tex, &sv_templ);
 447
 448       if (!sampler_view) {
 449          pipe_resource_reference(&tex, NULL);
 450          return;
 451       }
 452       pipe_resource_reference(&tex, NULL);
 453    }
 454    else {
 455       u_sampler_view_default_template(&sv_templ, src_tex, src_format);
 456       sampler_view = pipe->create_sampler_view(pipe, src_tex, &sv_templ);
 457
 458       if (!sampler_view) {
 459          return;
 460       }
 461
 462       s0 = srcX0;
 463       s1 = srcX1;
 464       t0 = srcY0;
 465       t1 = srcY1;
 466       normalized = sampler_view->texture->target != PIPE_TEXTURE_RECT;
 467       if(normalized)
 468       {
 469          s0 /= (float)(u_minify(sampler_view->texture->width0, src_level));
 470          s1 /= (float)(u_minify(sampler_view->texture->width0, src_level));
 471          t0 /= (float)(u_minify(sampler_view->texture->height0, src_level));
 472          t1 /= (float)(u_minify(sampler_view->texture->height0, src_level));
 473       }
 474    }
 475
 476    dst_is_depth = util_format_is_depth_or_stencil(dst_format);
 477
 478    assert(screen->is_format_supported(screen, sampler_view->format, ctx->internal_target,
 479                                       sampler_view->texture->nr_samples,
 480                                       PIPE_BIND_SAMPLER_VIEW));
 481    assert(screen->is_format_supported(screen, dst_format, ctx->internal_target,
 482                                       dst_surface->texture->nr_samples,
 483                                       dst_is_depth ? PIPE_BIND_DEPTH_STENCIL :
 484                                                      PIPE_BIND_RENDER_TARGET));
 485    /* save state (restored below) */
 486    cso_save_blend(ctx->cso);
 487    cso_save_depth_stencil_alpha(ctx->cso);
 488    cso_save_rasterizer(ctx->cso);
 489    cso_save_samplers(ctx->cso);
 490    cso_save_fragment_sampler_views(ctx->cso);
 491    cso_save_viewport(ctx->cso);
 492    cso_save_framebuffer(ctx->cso);
 493    cso_save_fragment_shader(ctx->cso);
 494    cso_save_vertex_shader(ctx->cso);
 495    cso_save_clip(ctx->cso);
 496    cso_save_vertex_elements(ctx->cso);
 497    cso_save_vertex_buffers(ctx->cso);
 498
 499    /* set misc state we care about */
 500    cso_set_blend(ctx->cso, &ctx->blend);
 501    cso_set_depth_stencil_alpha(ctx->cso,
 502                                dst_is_depth ? &ctx->depthstencil_write :
 503                                               &ctx->depthstencil_keep);
 504    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 505    cso_set_clip(ctx->cso, &ctx->clip);
 506    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
 507
 508    /* sampler */
 509    ctx->sampler.normalized_coords = normalized;
 510    ctx->sampler.min_img_filter = filter;
 511    ctx->sampler.mag_img_filter = filter;
 512    ctx->sampler.min_lod = src_level;
 513    ctx->sampler.max_lod = src_level;
 514    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 515    cso_single_sampler_done(ctx->cso);
 516
 517    /* viewport */
 518    ctx->viewport.scale[0] = 0.5f * dst_surface->width;
 519    ctx->viewport.scale[1] = 0.5f * dst_surface->height;
 520    ctx->viewport.scale[2] = 0.5f;
 521    ctx->viewport.scale[3] = 1.0f;
 522    ctx->viewport.translate[0] = 0.5f * dst_surface->width;
 523    ctx->viewport.translate[1] = 0.5f * dst_surface->height;
 524    ctx->viewport.translate[2] = 0.5f;
 525    ctx->viewport.translate[3] = 0.0f;
 526    cso_set_viewport(ctx->cso, &ctx->viewport);
 527
 528    /* texture */
 529    cso_set_fragment_sampler_views(ctx->cso, 1, &sampler_view);
 530
 531    /* shaders */
 532    if (dst_is_depth) {
 533       if (ctx->fs_depth == NULL)
 534          ctx->fs_depth =
 535             util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_2D,
 536                                                      TGSI_INTERPOLATE_LINEAR);
 537
 538       cso_set_fragment_shader_handle(ctx->cso, ctx->fs_depth);
 539    } else {
 540       if (ctx->fs[writemask] == NULL)
 541          ctx->fs[writemask] =
 542             util_make_fragment_tex_shader_writemask(pipe, TGSI_TEXTURE_2D,
 543                                                     TGSI_INTERPOLATE_LINEAR,
 544                                                     writemask);
 545
 546       cso_set_fragment_shader_handle(ctx->cso, ctx->fs[writemask]);
 547    }
 548    cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
 549
 550    /* drawing dest */
 551    memset(&fb, 0, sizeof(fb));
 552    fb.width = dst_surface->width;
 553    fb.height = dst_surface->height;
 554    if (dst_is_depth) {
 555       fb.zsbuf = dst_surface;
 556    } else {
 557       fb.nr_cbufs = 1;
 558       fb.cbufs[0] = dst_surface;
 559    }
 560    cso_set_framebuffer(ctx->cso, &fb);
 561
 562    /* draw quad */
 563    offset = setup_vertex_data_tex(ctx,
 564                                   (float) dstX0 / dst_surface->width * 2.0f - 1.0f,
 565                                   (float) dstY0 / dst_surface->height * 2.0f - 1.0f,
 566                                   (float) dstX1 / dst_surface->width * 2.0f - 1.0f,
 567                                   (float) dstY1 / dst_surface->height * 2.0f - 1.0f,
 568                                   s0, t0,
 569                                   s1, t1,
 570                                   z);
 571
 572    util_draw_vertex_buffer(ctx->pipe, ctx->cso, ctx->vbuf, offset,
 573                            PIPE_PRIM_TRIANGLE_FAN,
 574                            4,  /* verts */
 575                            2); /* attribs/vert */
 576
 577    /* restore state we changed */
 578    cso_restore_blend(ctx->cso);
 579    cso_restore_depth_stencil_alpha(ctx->cso);
 580    cso_restore_rasterizer(ctx->cso);
 581    cso_restore_samplers(ctx->cso);
 582    cso_restore_fragment_sampler_views(ctx->cso);
 583    cso_restore_viewport(ctx->cso);
 584    cso_restore_framebuffer(ctx->cso);
 585    cso_restore_fragment_shader(ctx->cso);
 586    cso_restore_vertex_shader(ctx->cso);
 587    cso_restore_clip(ctx->cso);
 588    cso_restore_vertex_elements(ctx->cso);
 589    cso_restore_vertex_buffers(ctx->cso);
 590
 591    pipe_sampler_view_reference(&sampler_view, NULL);
 592    if (dst_surface != dst)
 593       pipe_surface_reference(&dst_surface, NULL);
 594 }
 595
 596
 597 void
 598 util_blit_pixels(struct blit_state *ctx,
 599                  struct pipe_resource *src_tex,
 600                  unsigned src_level,
 601                  int srcX0, int srcY0,
 602                  int srcX1, int srcY1,
 603                  int srcZ,
 604                  struct pipe_surface *dst,
 605                  int dstX0, int dstY0,
 606                  int dstX1, int dstY1,
 607                  float z, uint filter )
 608 {
 609    util_blit_pixels_writemask( ctx, src_tex,
 610                                src_level,
 611                                srcX0, srcY0,
 612                                srcX1, srcY1,
 613                                srcZ,
 614                                dst,
 615                                dstX0, dstY0,
 616                                dstX1, dstY1,
 617                                z, filter,
 618                                TGSI_WRITEMASK_XYZW );
 619 }
 620
 621
 622 /* Release vertex buffer at end of frame to avoid synchronous
 623  * rendering.
 624  */
 625 void util_blit_flush( struct blit_state *ctx )
 626 {
 627    pipe_resource_reference(&ctx->vbuf, NULL);
 628    ctx->vbuf_slot = 0;
 629 }
 630
 631
 632
 633 /**
 634  * Copy pixel block from src texture to dst surface.
 635  *
 636  * XXX Should support selection of level.
 637  * XXX need some control over blitting Z and/or stencil.
 638  */
 639 void
 640 util_blit_pixels_tex(struct blit_state *ctx,
 641                      struct pipe_sampler_view *src_sampler_view,
 642                      int srcX0, int srcY0,
 643                      int srcX1, int srcY1,
 644                      struct pipe_surface *dst,
 645                      int dstX0, int dstY0,
 646                      int dstX1, int dstY1,
 647                      float z, uint filter)
 648 {
 649    boolean normalized = src_sampler_view->texture->target != PIPE_TEXTURE_RECT;
 650    struct pipe_framebuffer_state fb;
 651    float s0, t0, s1, t1;
 652    unsigned offset;
 653    struct pipe_resource *tex = src_sampler_view->texture;
 654
 655    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 656           filter == PIPE_TEX_MIPFILTER_LINEAR);
 657
 658    assert(tex);
 659    assert(tex->width0 != 0);
 660    assert(tex->height0 != 0);
 661
 662    s0 = srcX0;
 663    s1 = srcX1;
 664    t0 = srcY0;
 665    t1 = srcY1;
 666
 667    if(normalized)
 668    {
 669       s0 /= (float)tex->width0;
 670       s1 /= (float)tex->width0;
 671       t0 /= (float)tex->height0;
 672       t1 /= (float)tex->height0;
 673    }
 674
 675    assert(ctx->pipe->screen->is_format_supported(ctx->pipe->screen, dst->format,
 676                                                  PIPE_TEXTURE_2D,
 677                                                  dst->texture->nr_samples,
 678                                                  PIPE_BIND_RENDER_TARGET));
 679
 680    /* save state (restored below) */
 681    cso_save_blend(ctx->cso);
 682    cso_save_depth_stencil_alpha(ctx->cso);
 683    cso_save_rasterizer(ctx->cso);
 684    cso_save_samplers(ctx->cso);
 685    cso_save_fragment_sampler_views(ctx->cso);
 686    cso_save_viewport(ctx->cso);
 687    cso_save_framebuffer(ctx->cso);
 688    cso_save_fragment_shader(ctx->cso);
 689    cso_save_vertex_shader(ctx->cso);
 690    cso_save_clip(ctx->cso);
 691    cso_save_vertex_elements(ctx->cso);
 692    cso_save_vertex_buffers(ctx->cso);
 693
 694    /* set misc state we care about */
 695    cso_set_blend(ctx->cso, &ctx->blend);
 696    cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil_keep);
 697    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 698    cso_set_clip(ctx->cso, &ctx->clip);
 699    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
 700
 701    /* sampler */
 702    ctx->sampler.normalized_coords = normalized;
 703    ctx->sampler.min_img_filter = filter;
 704    ctx->sampler.mag_img_filter = filter;
 705    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 706    cso_single_sampler_done(ctx->cso);
 707
 708    /* viewport */
 709    ctx->viewport.scale[0] = 0.5f * dst->width;
 710    ctx->viewport.scale[1] = 0.5f * dst->height;
 711    ctx->viewport.scale[2] = 0.5f;
 712    ctx->viewport.scale[3] = 1.0f;
 713    ctx->viewport.translate[0] = 0.5f * dst->width;
 714    ctx->viewport.translate[1] = 0.5f * dst->height;
 715    ctx->viewport.translate[2] = 0.5f;
 716    ctx->viewport.translate[3] = 0.0f;
 717    cso_set_viewport(ctx->cso, &ctx->viewport);
 718
 719    /* texture */
 720    cso_set_fragment_sampler_views(ctx->cso, 1, &src_sampler_view);
 721
 722    /* shaders */
 723    cso_set_fragment_shader_handle(ctx->cso, ctx->fs[TGSI_WRITEMASK_XYZW]);
 724    cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
 725
 726    /* drawing dest */
 727    memset(&fb, 0, sizeof(fb));
 728    fb.width = dst->width;
 729    fb.height = dst->height;
 730    fb.nr_cbufs = 1;
 731    fb.cbufs[0] = dst;
 732    cso_set_framebuffer(ctx->cso, &fb);
 733
 734    /* draw quad */
 735    offset = setup_vertex_data_tex(ctx,
 736                                   (float) dstX0 / dst->width * 2.0f - 1.0f,
 737                                   (float) dstY0 / dst->height * 2.0f - 1.0f,
 738                                   (float) dstX1 / dst->width * 2.0f - 1.0f,
 739                                   (float) dstY1 / dst->height * 2.0f - 1.0f,
 740                                   s0, t0, s1, t1,
 741                                   z);
 742
 743    util_draw_vertex_buffer(ctx->pipe, ctx->cso,
 744                            ctx->vbuf, offset,
 745                            PIPE_PRIM_TRIANGLE_FAN,
 746                            4,  /* verts */
 747                            2); /* attribs/vert */
 748
 749    /* restore state we changed */
 750    cso_restore_blend(ctx->cso);
 751    cso_restore_depth_stencil_alpha(ctx->cso);
 752    cso_restore_rasterizer(ctx->cso);
 753    cso_restore_samplers(ctx->cso);
 754    cso_restore_fragment_sampler_views(ctx->cso);
 755    cso_restore_viewport(ctx->cso);
 756    cso_restore_framebuffer(ctx->cso);
 757    cso_restore_fragment_shader(ctx->cso);
 758    cso_restore_vertex_shader(ctx->cso);
 759    cso_restore_clip(ctx->cso);
 760    cso_restore_vertex_elements(ctx->cso);
 761    cso_restore_vertex_buffers(ctx->cso);
 762 }