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    struct pipe_sampler_view *sampler_view = NULL;
 308    struct pipe_sampler_view sv_templ;
 309    struct pipe_framebuffer_state fb;
 310    const int srcW = abs(srcX1 - srcX0);
 311    const int srcH = abs(srcY1 - srcY0);
 312    unsigned offset;
 313    boolean overlap, dst_is_depth;
 314    float s0, t0, s1, t1;
 315    boolean normalized;
 316
 317    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 318           filter == PIPE_TEX_MIPFILTER_LINEAR);
 319
 320    assert(src_level <= src_tex->last_level);
 321
 322    /* do the regions overlap? */
 323    overlap = src_tex == dst->texture &&
 324              dst->u.tex.level == src_level &&
 325              dst->u.tex.first_layer == srcZ0 &&
 326       regions_overlap(srcX0, srcY0, srcX1, srcY1,
 327                       dstX0, dstY0, dstX1, dstY1);
 328
 329    /*
 330     * Check for simple case:  no format conversion, no flipping, no stretching,
 331     * no overlapping.
 332     * Filter mode should not matter since there's no stretching.
 333     */
 334    if (dst->format == src_tex->format &&
 335        srcX0 < srcX1 &&
 336        dstX0 < dstX1 &&
 337        srcY0 < srcY1 &&
 338        dstY0 < dstY1 &&
 339        (dstX1 - dstX0) == (srcX1 - srcX0) &&
 340        (dstY1 - dstY0) == (srcY1 - srcY0) &&
 341        !overlap) {
 342       struct pipe_box src_box;
 343       src_box.x = srcX0;
 344       src_box.y = srcY0;
 345       src_box.z = srcZ0;
 346       src_box.width = srcW;
 347       src_box.height = srcH;
 348       src_box.depth = 1;
 349       pipe->resource_copy_region(pipe,
 350                                  dst->texture, dst->u.tex.level,
 351                                  dstX0, dstY0, dst->u.tex.first_layer,/* dest */
 352                                  src_tex, src_level,
 353                                  &src_box);
 354        return;
 355    }
 356
 357    /* Create a temporary texture when src and dest alias or when src
 358     * is anything other than a 2d texture.
 359     * XXX should just use appropriate shader to access 1d / 3d slice / cube face,
 360     * much like the u_blitter code does (should be pretty trivial).
 361     *
 362     * This can still be improved upon.
 363     */
 364    if ((src_tex == dst->texture &&
 365        dst->u.tex.level == src_level &&
 366        dst->u.tex.first_layer == srcZ0) ||
 367        (src_tex->target != PIPE_TEXTURE_2D &&
 368        src_tex->target != PIPE_TEXTURE_2D &&
 369        src_tex->target != PIPE_TEXTURE_RECT))
 370    {
 371       struct pipe_resource texTemp;
 372       struct pipe_resource *tex;
 373       struct pipe_sampler_view sv_templ;
 374       struct pipe_box src_box;
 375       const int srcLeft = MIN2(srcX0, srcX1);
 376       const int srcTop = MIN2(srcY0, srcY1);
 377
 378       if (srcLeft != srcX0) {
 379          /* left-right flip */
 380          int tmp = dstX0;
 381          dstX0 = dstX1;
 382          dstX1 = tmp;
 383       }
 384
 385       if (srcTop != srcY0) {
 386          /* up-down flip */
 387          int tmp = dstY0;
 388          dstY0 = dstY1;
 389          dstY1 = tmp;
 390       }
 391
 392       /* create temp texture */
 393       memset(&texTemp, 0, sizeof(texTemp));
 394       texTemp.target = ctx->internal_target;
 395       texTemp.format = src_tex->format;
 396       texTemp.last_level = 0;
 397       texTemp.width0 = srcW;
 398       texTemp.height0 = srcH;
 399       texTemp.depth0 = 1;
 400       texTemp.array_size = 1;
 401       texTemp.bind = PIPE_BIND_SAMPLER_VIEW;
 402
 403       tex = screen->resource_create(screen, &texTemp);
 404       if (!tex)
 405          return;
 406
 407       src_box.x = srcLeft;
 408       src_box.y = srcTop;
 409       src_box.z = srcZ0;
 410       src_box.width = srcW;
 411       src_box.height = srcH;
 412       src_box.depth = 1;
 413       /* load temp texture */
 414       pipe->resource_copy_region(pipe,
 415                                  tex, 0, 0, 0, 0,  /* dest */
 416                                  src_tex, src_level, &src_box);
 417
 418       normalized = tex->target != PIPE_TEXTURE_RECT;
 419       if(normalized) {
 420          s0 = 0.0f;
 421          s1 = 1.0f;
 422          t0 = 0.0f;
 423          t1 = 1.0f;
 424       }
 425       else {
 426          s0 = 0;
 427          s1 = srcW;
 428          t0 = 0;
 429          t1 = srcH;
 430       }
 431
 432       u_sampler_view_default_template(&sv_templ, tex, tex->format);
 433       sampler_view = pipe->create_sampler_view(pipe, tex, &sv_templ);
 434
 435       if (!sampler_view) {
 436          pipe_resource_reference(&tex, NULL);
 437          return;
 438       }
 439       pipe_resource_reference(&tex, NULL);
 440    }
 441    else {
 442       u_sampler_view_default_template(&sv_templ, src_tex, src_tex->format);
 443       sampler_view = pipe->create_sampler_view(pipe, src_tex, &sv_templ);
 444
 445       if (!sampler_view) {
 446          return;
 447       }
 448
 449       s0 = srcX0;
 450       s1 = srcX1;
 451       t0 = srcY0;
 452       t1 = srcY1;
 453       normalized = sampler_view->texture->target != PIPE_TEXTURE_RECT;
 454       if(normalized)
 455       {
 456          s0 /= (float)(u_minify(sampler_view->texture->width0, src_level));
 457          s1 /= (float)(u_minify(sampler_view->texture->width0, src_level));
 458          t0 /= (float)(u_minify(sampler_view->texture->height0, src_level));
 459          t1 /= (float)(u_minify(sampler_view->texture->height0, src_level));
 460       }
 461    }
 462
 463    dst_is_depth = util_format_is_depth_or_stencil(dst->format);
 464
 465    assert(screen->is_format_supported(screen, sampler_view->format, ctx->internal_target,
 466                                       sampler_view->texture->nr_samples,
 467                                       PIPE_BIND_SAMPLER_VIEW));
 468    assert(screen->is_format_supported(screen, dst->format, ctx->internal_target,
 469                                       dst->texture->nr_samples,
 470                                       dst_is_depth ? PIPE_BIND_DEPTH_STENCIL :
 471                                                      PIPE_BIND_RENDER_TARGET));
 472    /* save state (restored below) */
 473    cso_save_blend(ctx->cso);
 474    cso_save_depth_stencil_alpha(ctx->cso);
 475    cso_save_rasterizer(ctx->cso);
 476    cso_save_samplers(ctx->cso);
 477    cso_save_fragment_sampler_views(ctx->cso);
 478    cso_save_viewport(ctx->cso);
 479    cso_save_framebuffer(ctx->cso);
 480    cso_save_fragment_shader(ctx->cso);
 481    cso_save_vertex_shader(ctx->cso);
 482    cso_save_clip(ctx->cso);
 483    cso_save_vertex_elements(ctx->cso);
 484    cso_save_vertex_buffers(ctx->cso);
 485
 486    /* set misc state we care about */
 487    cso_set_blend(ctx->cso, &ctx->blend);
 488    cso_set_depth_stencil_alpha(ctx->cso,
 489                                dst_is_depth ? &ctx->depthstencil_write :
 490                                               &ctx->depthstencil_keep);
 491    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 492    cso_set_clip(ctx->cso, &ctx->clip);
 493    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
 494
 495    /* sampler */
 496    ctx->sampler.normalized_coords = normalized;
 497    ctx->sampler.min_img_filter = filter;
 498    ctx->sampler.mag_img_filter = filter;
 499    ctx->sampler.min_lod = src_level;
 500    ctx->sampler.max_lod = src_level;
 501    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 502    cso_single_sampler_done(ctx->cso);
 503
 504    /* viewport */
 505    ctx->viewport.scale[0] = 0.5f * dst->width;
 506    ctx->viewport.scale[1] = 0.5f * dst->height;
 507    ctx->viewport.scale[2] = 0.5f;
 508    ctx->viewport.scale[3] = 1.0f;
 509    ctx->viewport.translate[0] = 0.5f * dst->width;
 510    ctx->viewport.translate[1] = 0.5f * dst->height;
 511    ctx->viewport.translate[2] = 0.5f;
 512    ctx->viewport.translate[3] = 0.0f;
 513    cso_set_viewport(ctx->cso, &ctx->viewport);
 514
 515    /* texture */
 516    cso_set_fragment_sampler_views(ctx->cso, 1, &sampler_view);
 517
 518    /* shaders */
 519    if (dst_is_depth) {
 520       if (ctx->fs_depth == NULL)
 521          ctx->fs_depth =
 522             util_make_fragment_tex_shader_writedepth(pipe, TGSI_TEXTURE_2D,
 523                                                      TGSI_INTERPOLATE_LINEAR);
 524
 525       cso_set_fragment_shader_handle(ctx->cso, ctx->fs_depth);
 526    } else {
 527       if (ctx->fs[writemask] == NULL)
 528          ctx->fs[writemask] =
 529             util_make_fragment_tex_shader_writemask(pipe, TGSI_TEXTURE_2D,
 530                                                     TGSI_INTERPOLATE_LINEAR,
 531                                                     writemask);
 532
 533       cso_set_fragment_shader_handle(ctx->cso, ctx->fs[writemask]);
 534    }
 535    cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
 536
 537    /* drawing dest */
 538    memset(&fb, 0, sizeof(fb));
 539    fb.width = dst->width;
 540    fb.height = dst->height;
 541    if (dst_is_depth) {
 542       fb.zsbuf = dst;
 543    } else {
 544       fb.nr_cbufs = 1;
 545       fb.cbufs[0] = dst;
 546    }
 547    cso_set_framebuffer(ctx->cso, &fb);
 548
 549    /* draw quad */
 550    offset = setup_vertex_data_tex(ctx,
 551                                   (float) dstX0 / dst->width * 2.0f - 1.0f,
 552                                   (float) dstY0 / dst->height * 2.0f - 1.0f,
 553                                   (float) dstX1 / dst->width * 2.0f - 1.0f,
 554                                   (float) dstY1 / dst->height * 2.0f - 1.0f,
 555                                   s0, t0,
 556                                   s1, t1,
 557                                   z);
 558
 559    util_draw_vertex_buffer(ctx->pipe, ctx->cso, ctx->vbuf, offset,
 560                            PIPE_PRIM_TRIANGLE_FAN,
 561                            4,  /* verts */
 562                            2); /* attribs/vert */
 563
 564    /* restore state we changed */
 565    cso_restore_blend(ctx->cso);
 566    cso_restore_depth_stencil_alpha(ctx->cso);
 567    cso_restore_rasterizer(ctx->cso);
 568    cso_restore_samplers(ctx->cso);
 569    cso_restore_fragment_sampler_views(ctx->cso);
 570    cso_restore_viewport(ctx->cso);
 571    cso_restore_framebuffer(ctx->cso);
 572    cso_restore_fragment_shader(ctx->cso);
 573    cso_restore_vertex_shader(ctx->cso);
 574    cso_restore_clip(ctx->cso);
 575    cso_restore_vertex_elements(ctx->cso);
 576    cso_restore_vertex_buffers(ctx->cso);
 577
 578    pipe_sampler_view_reference(&sampler_view, NULL);
 579 }
 580
 581
 582 void
 583 util_blit_pixels(struct blit_state *ctx,
 584                  struct pipe_resource *src_tex,
 585                  unsigned src_level,
 586                  int srcX0, int srcY0,
 587                  int srcX1, int srcY1,
 588                  int srcZ,
 589                  struct pipe_surface *dst,
 590                  int dstX0, int dstY0,
 591                  int dstX1, int dstY1,
 592                  float z, uint filter )
 593 {
 594    util_blit_pixels_writemask( ctx, src_tex,
 595                                src_level,
 596                                srcX0, srcY0,
 597                                srcX1, srcY1,
 598                                srcZ,
 599                                dst,
 600                                dstX0, dstY0,
 601                                dstX1, dstY1,
 602                                z, filter,
 603                                TGSI_WRITEMASK_XYZW );
 604 }
 605
 606
 607 /* Release vertex buffer at end of frame to avoid synchronous
 608  * rendering.
 609  */
 610 void util_blit_flush( struct blit_state *ctx )
 611 {
 612    pipe_resource_reference(&ctx->vbuf, NULL);
 613    ctx->vbuf_slot = 0;
 614 }
 615
 616
 617
 618 /**
 619  * Copy pixel block from src texture to dst surface.
 620  *
 621  * XXX Should support selection of level.
 622  * XXX need some control over blitting Z and/or stencil.
 623  */
 624 void
 625 util_blit_pixels_tex(struct blit_state *ctx,
 626                      struct pipe_sampler_view *src_sampler_view,
 627                      int srcX0, int srcY0,
 628                      int srcX1, int srcY1,
 629                      struct pipe_surface *dst,
 630                      int dstX0, int dstY0,
 631                      int dstX1, int dstY1,
 632                      float z, uint filter)
 633 {
 634    boolean normalized = src_sampler_view->texture->target != PIPE_TEXTURE_RECT;
 635    struct pipe_framebuffer_state fb;
 636    float s0, t0, s1, t1;
 637    unsigned offset;
 638    struct pipe_resource *tex = src_sampler_view->texture;
 639
 640    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 641           filter == PIPE_TEX_MIPFILTER_LINEAR);
 642
 643    assert(tex);
 644    assert(tex->width0 != 0);
 645    assert(tex->height0 != 0);
 646
 647    s0 = srcX0;
 648    s1 = srcX1;
 649    t0 = srcY0;
 650    t1 = srcY1;
 651
 652    if(normalized)
 653    {
 654       s0 /= (float)tex->width0;
 655       s1 /= (float)tex->width0;
 656       t0 /= (float)tex->height0;
 657       t1 /= (float)tex->height0;
 658    }
 659
 660    assert(ctx->pipe->screen->is_format_supported(ctx->pipe->screen, dst->format,
 661                                                  PIPE_TEXTURE_2D,
 662                                                  dst->texture->nr_samples,
 663                                                  PIPE_BIND_RENDER_TARGET));
 664
 665    /* save state (restored below) */
 666    cso_save_blend(ctx->cso);
 667    cso_save_depth_stencil_alpha(ctx->cso);
 668    cso_save_rasterizer(ctx->cso);
 669    cso_save_samplers(ctx->cso);
 670    cso_save_fragment_sampler_views(ctx->cso);
 671    cso_save_viewport(ctx->cso);
 672    cso_save_framebuffer(ctx->cso);
 673    cso_save_fragment_shader(ctx->cso);
 674    cso_save_vertex_shader(ctx->cso);
 675    cso_save_clip(ctx->cso);
 676    cso_save_vertex_elements(ctx->cso);
 677    cso_save_vertex_buffers(ctx->cso);
 678
 679    /* set misc state we care about */
 680    cso_set_blend(ctx->cso, &ctx->blend);
 681    cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil_keep);
 682    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 683    cso_set_clip(ctx->cso, &ctx->clip);
 684    cso_set_vertex_elements(ctx->cso, 2, ctx->velem);
 685
 686    /* sampler */
 687    ctx->sampler.normalized_coords = normalized;
 688    ctx->sampler.min_img_filter = filter;
 689    ctx->sampler.mag_img_filter = filter;
 690    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 691    cso_single_sampler_done(ctx->cso);
 692
 693    /* viewport */
 694    ctx->viewport.scale[0] = 0.5f * dst->width;
 695    ctx->viewport.scale[1] = 0.5f * dst->height;
 696    ctx->viewport.scale[2] = 0.5f;
 697    ctx->viewport.scale[3] = 1.0f;
 698    ctx->viewport.translate[0] = 0.5f * dst->width;
 699    ctx->viewport.translate[1] = 0.5f * dst->height;
 700    ctx->viewport.translate[2] = 0.5f;
 701    ctx->viewport.translate[3] = 0.0f;
 702    cso_set_viewport(ctx->cso, &ctx->viewport);
 703
 704    /* texture */
 705    cso_set_fragment_sampler_views(ctx->cso, 1, &src_sampler_view);
 706
 707    /* shaders */
 708    cso_set_fragment_shader_handle(ctx->cso, ctx->fs[TGSI_WRITEMASK_XYZW]);
 709    cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
 710
 711    /* drawing dest */
 712    memset(&fb, 0, sizeof(fb));
 713    fb.width = dst->width;
 714    fb.height = dst->height;
 715    fb.nr_cbufs = 1;
 716    fb.cbufs[0] = dst;
 717    cso_set_framebuffer(ctx->cso, &fb);
 718
 719    /* draw quad */
 720    offset = setup_vertex_data_tex(ctx,
 721                                   (float) dstX0 / dst->width * 2.0f - 1.0f,
 722                                   (float) dstY0 / dst->height * 2.0f - 1.0f,
 723                                   (float) dstX1 / dst->width * 2.0f - 1.0f,
 724                                   (float) dstY1 / dst->height * 2.0f - 1.0f,
 725                                   s0, t0, s1, t1,
 726                                   z);
 727
 728    util_draw_vertex_buffer(ctx->pipe, ctx->cso,
 729                            ctx->vbuf, offset,
 730                            PIPE_PRIM_TRIANGLE_FAN,
 731                            4,  /* verts */
 732                            2); /* attribs/vert */
 733
 734    /* restore state we changed */
 735    cso_restore_blend(ctx->cso);
 736    cso_restore_depth_stencil_alpha(ctx->cso);
 737    cso_restore_rasterizer(ctx->cso);
 738    cso_restore_samplers(ctx->cso);
 739    cso_restore_fragment_sampler_views(ctx->cso);
 740    cso_restore_viewport(ctx->cso);
 741    cso_restore_framebuffer(ctx->cso);
 742    cso_restore_fragment_shader(ctx->cso);
 743    cso_restore_vertex_shader(ctx->cso);
 744    cso_restore_clip(ctx->cso);
 745    cso_restore_vertex_elements(ctx->cso);
 746    cso_restore_vertex_buffers(ctx->cso);
 747 }