src/gallium/drivers/svga/svga_pipe_blit.c

   1 /**********************************************************
   2  * Copyright 2008-2017 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "svga_context.h"
  27 #include "svga_debug.h"
  28 #include "svga_cmd.h"
  29 #include "svga_format.h"
  30 #include "svga_resource_buffer.h"
  31 #include "svga_resource_texture.h"
  32 #include "svga_surface.h"
  33
  34 //#include "util/u_blit_sw.h"
  35 #include "util/u_format.h"
  36 #include "util/u_surface.h"
  37
  38 #define FILE_DEBUG_FLAG DEBUG_BLIT
  39
  40
  41 /**
  42  * Build a struct pipe_blit_info object from the arguments used by the
  43  * pipe::resource_copy_region() function.
  44  */
  45 static void
  46 build_blit_info(struct pipe_resource *dst_tex,
  47                 unsigned dst_level,
  48                 unsigned dst_x,
  49                 unsigned dst_y,
  50                 unsigned dst_z,
  51                 struct pipe_resource *src_tex,
  52                 unsigned src_level,
  53                 const struct pipe_box *src_box,
  54                 struct pipe_blit_info *blit)
  55 {
  56    memset(blit, 0, sizeof(*blit));
  57
  58    blit->src.format = src_tex->format;
  59    blit->dst.format = dst_tex->format;
  60
  61    blit->mask = util_format_get_mask(blit->dst.format);
  62    blit->filter = PIPE_TEX_FILTER_NEAREST;
  63    blit->src.resource = src_tex;
  64    blit->src.level = src_level;
  65    blit->dst.resource = dst_tex;
  66    blit->dst.level = dst_level;
  67    blit->src.box = *src_box;
  68    u_box_3d(dst_x, dst_y, dst_z, src_box->width, src_box->height,
  69             src_box->depth, &blit->dst.box);
  70 }
  71
  72
  73 /**
  74  * Copy an image between textures with the vgpu10 CopyRegion command.
  75  */
  76 static void
  77 copy_region_vgpu10(struct svga_context *svga, struct pipe_resource *src_tex,
  78                     unsigned src_x, unsigned src_y, unsigned src_z,
  79                     unsigned src_level, unsigned src_face,
  80                     struct pipe_resource *dst_tex,
  81                     unsigned dst_x, unsigned dst_y, unsigned dst_z,
  82                     unsigned dst_level, unsigned dst_face,
  83                     unsigned width, unsigned height, unsigned depth)
  84 {
  85    enum pipe_error ret;
  86    uint32 srcSubResource, dstSubResource;
  87    struct svga_texture *dtex, *stex;
  88    SVGA3dCopyBox box;
  89
  90    stex = svga_texture(src_tex);
  91    dtex = svga_texture(dst_tex);
  92
  93    svga_surfaces_flush(svga);
  94
  95    box.x = dst_x;
  96    box.y = dst_y;
  97    box.z = dst_z;
  98    box.w = width;
  99    box.h = height;
 100    box.d = depth;
 101    box.srcx = src_x;
 102    box.srcy = src_y;
 103    box.srcz = src_z;
 104
 105    srcSubResource = src_face * (src_tex->last_level + 1) + src_level;
 106    dstSubResource = dst_face * (dst_tex->last_level + 1) + dst_level;
 107
 108    ret = SVGA3D_vgpu10_PredCopyRegion(svga->swc,
 109                                       dtex->handle, dstSubResource,
 110                                       stex->handle, srcSubResource, &box);
 111    if (ret != PIPE_OK) {
 112       svga_context_flush(svga, NULL);
 113       ret = SVGA3D_vgpu10_PredCopyRegion(svga->swc,
 114                                          dtex->handle, dstSubResource,
 115                                          stex->handle, srcSubResource, &box);
 116       assert(ret == PIPE_OK);
 117    }
 118
 119    /* Mark the texture subresource as defined. */
 120    svga_define_texture_level(dtex, dst_face, dst_level);
 121
 122    /* Mark the texture subresource as rendered-to. */
 123    svga_set_texture_rendered_to(dtex, dst_face, dst_level);
 124 }
 125
 126
 127 /**
 128  * Fallback to the copy region utility which uses map/memcpy for the copy
 129  */
 130 static void
 131 copy_region_fallback(struct svga_context *svga,
 132                      struct pipe_resource *dst_tex, unsigned dst_level,
 133                      unsigned dstx, unsigned dsty, unsigned dstz,
 134                      struct pipe_resource *src_tex, unsigned src_level,
 135                      const struct pipe_box *src_box)
 136 {
 137    struct svga_winsys_screen *sws = svga_screen(svga->pipe.screen)->sws;
 138
 139    SVGA_STATS_TIME_PUSH(sws, SVGA_STATS_TIME_COPYREGIONFALLBACK);
 140    util_resource_copy_region(&svga->pipe, dst_tex, dst_level, dstx,
 141                              dsty, dstz, src_tex, src_level, src_box);
 142    SVGA_STATS_TIME_POP(sws);
 143    (void) sws;
 144 }
 145
 146
 147 /**
 148  * For some texture types, we need to move the z (slice) coordinate
 149  * to the layer value.  For example, to select the z=3 slice of a 2D ARRAY
 150  * texture, we need to use layer=3 and set z=0.
 151  */
 152 static void
 153 adjust_z_layer(enum pipe_texture_target target,
 154                int z_in, unsigned *layer_out, unsigned *z_out)
 155 {
 156    if (target == PIPE_TEXTURE_CUBE ||
 157        target == PIPE_TEXTURE_2D_ARRAY ||
 158        target == PIPE_TEXTURE_1D_ARRAY) {
 159       *layer_out = z_in;
 160       *z_out = 0;
 161    }
 162    else {
 163       *layer_out = 0;
 164       *z_out = z_in;
 165    }
 166 }
 167
 168
 169 /**
 170  * Are the given SVGA3D formats compatible, in terms of vgpu10's
 171  * PredCopyRegion() command?
 172  */
 173 static bool
 174 formats_compatible(const struct svga_screen *ss,
 175                    SVGA3dSurfaceFormat src_svga_fmt,
 176                    SVGA3dSurfaceFormat dst_svga_fmt)
 177 {
 178    src_svga_fmt = svga_typeless_format(src_svga_fmt);
 179    dst_svga_fmt = svga_typeless_format(dst_svga_fmt);
 180
 181    return src_svga_fmt == dst_svga_fmt;
 182 }
 183
 184
 185 /**
 186  * Check whether the blending is enabled or not
 187  */
 188 static bool
 189 is_blending_enabled(struct svga_context *svga,
 190                     const struct pipe_blit_info *blit)
 191 {
 192    bool blend_enable = false;
 193    int i;
 194    if (svga->curr.blend) {
 195       if (svga->curr.blend->independent_blend_enable) {
 196          for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 197             if (svga->curr.framebuffer.cbufs[i]->texture == blit->dst.resource) {
 198                if (svga->curr.blend->rt[i].blend_enable) {
 199                   blend_enable = true;
 200                }
 201                break;
 202             }
 203          }
 204       }
 205       else {
 206          if (svga->curr.blend->rt[0].blend_enable)
 207             blend_enable = true;
 208       }
 209    }
 210    return blend_enable;
 211 }
 212
 213
 214 /**
 215  * If GL_FRAMEBUFFER_SRGB is enabled, then output colorspace is
 216  * expected to be sRGB if blending is not enabled.
 217  * If GL_FRAMEBUFFER_SRGB is disabled, then we can use
 218  * copy_region_vgpu10()
 219  * Following table basically tells when copy_region_vgpu10 can be
 220  * used if GL_FRAMEBUFFER_SRGB is enabled.
 221  * ______________________________________________________________
 222  *  | src fmt     | dst_fmt   | blending  |Can use       |
 223  *  |             |           |           |copy_region   |
 224  * ______________________________________________________________
 225  *  | linear      | linear    |   N       |     Y        |
 226  *  | linear      | linear    |   Y       |     Y        |
 227  *  | linear      | sRGB      |   N       |     N        |
 228  *  | linear      | sRGB      |   Y       |     Y        |
 229  *  | sRGB        | linear    |   N       |     N        |
 230  *  | sRGB        | linear    |   Y       |     N        |
 231  *  | sRGB        | sRGB      |   N       |     Y        |
 232  *  | sRGB        | sRGB      |   Y       |     N        |
 233  * ______________________________________________________________
 234  *
 235  */
 236 static bool
 237 check_blending_and_srgb_cond(struct svga_context *svga,
 238                              const struct pipe_blit_info *blit)
 239 {
 240    enum pipe_format sFmt = blit->src.format;
 241    enum pipe_format dFmt = blit->dst.format;
 242
 243    if (is_blending_enabled(svga, blit)) {
 244       if (!util_format_is_srgb(blit->src.format))
 245          return true;
 246    }
 247    else {
 248       if (util_format_is_srgb(sFmt) && util_format_is_srgb(dFmt))
 249          return true;
 250       else if (!util_format_is_srgb(sFmt)){
 251          if (!util_format_is_srgb(dFmt))
 252             return true;
 253          else {
 254            /**
 255             * State tracker converts all sRGB src blit format
 256             * to linear if GL_FRAMEBUFFER_SRGB is disabled.
 257             * So if src resource format is sRGB and
 258             * blit format is linear then it means,
 259             * GL_FRAMEBUFFER_SRGB is disabled. In this case also
 260             * we can use copy_region_vgpu10().
 261             */
 262
 263             if (util_format_is_srgb(blit->src.resource->format))
 264                return true;
 265          }
 266       }
 267    }
 268    return false;
 269 }
 270
 271 /**
 272  * Do common checks for svga surface copy.
 273  */
 274 static bool
 275 can_blit_via_svga_copy_region(struct svga_context *svga,
 276                               const struct pipe_blit_info *blit_info)
 277 {
 278    if (!util_can_blit_via_copy_region(blit_info, FALSE) &&
 279        !util_can_blit_via_copy_region(blit_info, TRUE))
 280       return false;
 281
 282    /* For depth+stencil formats, copy with mask != PIPE_MASK_ZS is not
 283     * supported
 284     */
 285    if (util_format_is_depth_and_stencil(blit_info->src.format) &&
 286       blit_info->mask != (PIPE_MASK_ZS))
 287      return false;
 288
 289    return check_blending_and_srgb_cond(svga, blit_info);
 290 }
 291
 292
 293 /**
 294  * The state tracker implements some resource copies with blits (for
 295  * GL_ARB_copy_image).  This function checks if we should really do the blit
 296  * with a VGPU10 CopyRegion command or software fallback (for incompatible
 297  * src/dst formats).
 298  */
 299 static bool
 300 can_blit_via_copy_region_vgpu10(struct svga_context *svga,
 301                                 const struct pipe_blit_info *blit_info)
 302 {
 303    struct svga_texture *dtex, *stex;
 304
 305    /* can't copy between different resource types */
 306    if (svga_resource_type(blit_info->src.resource->target) !=
 307        svga_resource_type(blit_info->dst.resource->target))
 308       return false;
 309
 310    stex = svga_texture(blit_info->src.resource);
 311    dtex = svga_texture(blit_info->dst.resource);
 312
 313    if (!svga_have_vgpu10(svga))
 314       return false;
 315
 316    if (stex->handle == dtex->handle)
 317       return false;
 318
 319    return formats_compatible(svga_screen(svga->pipe.screen),
 320                              stex->key.format,
 321                              dtex->key.format);
 322 }
 323
 324
 325 /**
 326  * Check whether we can blit using the surface_copy command.
 327  */
 328 static bool
 329 can_blit_via_surface_copy(struct svga_context *svga,
 330                           const struct pipe_blit_info *blit_info)
 331 {
 332    struct svga_texture *dtex, *stex;
 333
 334    if (svga->render_condition && blit_info->render_condition_enable)
 335       return false;
 336
 337    /* can't copy between different resource types */
 338    if (svga_resource_type(blit_info->src.resource->target) !=
 339        svga_resource_type(blit_info->dst.resource->target))
 340       return false;
 341
 342    stex = svga_texture(blit_info->src.resource);
 343    dtex = svga_texture(blit_info->dst.resource);
 344
 345    if (stex->handle == dtex->handle)
 346       return false;
 347
 348    /*
 349     * This is what we've been using before, but it can probably be
 350     * relaxed. The device checks are less stringent.
 351     */
 352    return (stex->b.b.format == dtex->b.b.format);
 353 }
 354
 355
 356 /**
 357  * Try region copy using one of the region copy commands
 358  */
 359 static bool
 360 try_copy_region(struct svga_context *svga,
 361                 const struct pipe_blit_info *blit)
 362 {
 363    unsigned src_face, src_z, dst_face, dst_z;
 364
 365    if (!can_blit_via_svga_copy_region(svga, blit))
 366       return false;
 367
 368    adjust_z_layer(blit->src.resource->target, blit->src.box.z,
 369                   &src_face, &src_z);
 370
 371    adjust_z_layer(blit->dst.resource->target, blit->dst.box.z,
 372                   &dst_face, &dst_z);
 373
 374    if (can_blit_via_copy_region_vgpu10(svga, blit)) {
 375       svga_toggle_render_condition(svga, blit->render_condition_enable, FALSE);
 376
 377       copy_region_vgpu10(svga,
 378                          blit->src.resource,
 379                          blit->src.box.x, blit->src.box.y, src_z,
 380                          blit->src.level, src_face,
 381                          blit->dst.resource,
 382                          blit->dst.box.x, blit->dst.box.y, dst_z,
 383                          blit->dst.level, dst_face,
 384                          blit->src.box.width, blit->src.box.height,
 385                          blit->src.box.depth);
 386
 387       svga_toggle_render_condition(svga, blit->render_condition_enable, TRUE);
 388
 389       return true;
 390    }
 391
 392    if (can_blit_via_surface_copy(svga, blit)) {
 393       struct svga_texture *stex = svga_texture(blit->src.resource);
 394       struct svga_texture *dtex = svga_texture(blit->dst.resource);
 395
 396       svga_surfaces_flush(svga);
 397
 398       svga_texture_copy_handle(svga,
 399                                stex->handle,
 400                                blit->src.box.x, blit->src.box.y, src_z,
 401                                blit->src.level, src_face,
 402                                dtex->handle,
 403                                blit->dst.box.x, blit->dst.box.y, dst_z,
 404                                blit->dst.level, dst_face,
 405                                blit->src.box.width, blit->src.box.height,
 406                                blit->src.box.depth);
 407
 408       svga_define_texture_level(dtex, dst_face, blit->dst.level);
 409       svga_set_texture_rendered_to(dtex, dst_face, blit->dst.level);
 410       return true;
 411    }
 412
 413    return false;
 414 }
 415
 416
 417 /**
 418  * A helper function to determine if the specified view format
 419  * is compatible with the surface format.
 420  * It is compatible if the view format is the same as the surface format,
 421  * or the associated svga format for the surface is a typeless format, or
 422  * the view format is an adjusted format for BGRX/BGRA resource.
 423  */
 424 static bool
 425 is_view_format_compatible(enum pipe_format surf_fmt,
 426                           SVGA3dSurfaceFormat surf_svga_fmt,
 427                           enum pipe_format view_fmt)
 428 {
 429    if (surf_fmt == view_fmt || svga_format_is_typeless(surf_svga_fmt))
 430       return true;
 431
 432    if ((surf_fmt == PIPE_FORMAT_B8G8R8X8_UNORM &&
 433         view_fmt == PIPE_FORMAT_B8G8R8A8_UNORM) ||
 434        (surf_fmt == PIPE_FORMAT_B8G8R8A8_UNORM &&
 435         view_fmt == PIPE_FORMAT_B8G8R8X8_UNORM))
 436       return true;
 437
 438    return false;
 439 }
 440
 441
 442 /**
 443  * Try issuing a quad blit.
 444  */
 445 static bool
 446 try_blit(struct svga_context *svga, const struct pipe_blit_info *blit_info)
 447 {
 448    struct svga_winsys_screen *sws = svga_screen(svga->pipe.screen)->sws;
 449    struct pipe_resource *src = blit_info->src.resource;
 450    struct pipe_resource *dst = blit_info->dst.resource;
 451    struct pipe_resource *newSrc = NULL;
 452    struct pipe_resource *newDst = NULL;
 453    bool can_create_src_view;
 454    bool can_create_dst_view;
 455    bool ret = true;
 456    struct pipe_blit_info blit = *blit_info;
 457
 458    SVGA_STATS_TIME_PUSH(sws, SVGA_STATS_TIME_BLITBLITTER);
 459
 460    /**
 461     * If format is srgb and blend is enabled then color values need
 462     * to be converted into linear format.
 463     */
 464    if (is_blending_enabled(svga, &blit))
 465       blit.src.format = util_format_linear(blit.src.format);
 466
 467    /* Check if we can create shader resource view and
 468     * render target view for the quad blitter to work
 469     */
 470    can_create_src_view =
 471       is_view_format_compatible(src->format, svga_texture(src)->key.format,
 472                                 blit.src.format);
 473
 474    can_create_dst_view =
 475       is_view_format_compatible(dst->format, svga_texture(dst)->key.format,
 476                                 blit.dst.format);
 477
 478    if ((blit.mask & PIPE_MASK_S) ||
 479        ((!can_create_dst_view || !can_create_src_view)
 480         && !svga_have_vgpu10(svga))) {
 481       /* Can't do stencil blits with textured quad blitter */
 482       debug_warn_once("using software stencil blit");
 483       ret = false;
 484       goto done;
 485    }
 486
 487    if (!util_blitter_is_blit_supported(svga->blitter, &blit)) {
 488       debug_printf("svga: blit unsupported %s -> %s\n",
 489                    util_format_short_name(blit.src.resource->format),
 490                    util_format_short_name(blit.dst.resource->format));
 491       ret = false;
 492       goto done;
 493    }
 494
 495    /* XXX turn off occlusion and streamout queries */
 496
 497    util_blitter_save_vertex_buffer_slot(svga->blitter, svga->curr.vb);
 498    util_blitter_save_vertex_elements(svga->blitter, (void*)svga->curr.velems);
 499    util_blitter_save_vertex_shader(svga->blitter, svga->curr.vs);
 500    util_blitter_save_geometry_shader(svga->blitter, svga->curr.user_gs);
 501    util_blitter_save_so_targets(svga->blitter, svga->num_so_targets,
 502                      (struct pipe_stream_output_target**)svga->so_targets);
 503    util_blitter_save_rasterizer(svga->blitter, (void*)svga->curr.rast);
 504    util_blitter_save_viewport(svga->blitter, &svga->curr.viewport);
 505    util_blitter_save_scissor(svga->blitter, &svga->curr.scissor);
 506    util_blitter_save_fragment_shader(svga->blitter, svga->curr.fs);
 507    util_blitter_save_blend(svga->blitter, (void*)svga->curr.blend);
 508    util_blitter_save_depth_stencil_alpha(svga->blitter,
 509                                          (void*)svga->curr.depth);
 510    util_blitter_save_stencil_ref(svga->blitter, &svga->curr.stencil_ref);
 511    util_blitter_save_sample_mask(svga->blitter, svga->curr.sample_mask);
 512    util_blitter_save_framebuffer(svga->blitter, &svga->curr.framebuffer);
 513    util_blitter_save_fragment_sampler_states(svga->blitter,
 514                      svga->curr.num_samplers[PIPE_SHADER_FRAGMENT],
 515                      (void**)svga->curr.sampler[PIPE_SHADER_FRAGMENT]);
 516    util_blitter_save_fragment_sampler_views(svga->blitter,
 517                      svga->curr.num_sampler_views[PIPE_SHADER_FRAGMENT],
 518                      svga->curr.sampler_views[PIPE_SHADER_FRAGMENT]);
 519
 520    if (!can_create_src_view) {
 521       struct pipe_resource template;
 522       struct pipe_blit_info copy_region_blit;
 523
 524       /**
 525        * If the source blit format is not compatible with the source resource
 526        * format, we will not be able to create a shader resource view.
 527        * In order to avoid falling back to software blit, we'll create
 528        * a new resource in the blit format, and use DXCopyResource to
 529        * copy from the original format to the new format. The new
 530        * resource will be used for the blit in util_blitter_blit().
 531        */
 532       template = *src;
 533       template.format = blit.src.format;
 534       newSrc = svga_texture_create(svga->pipe.screen, &template);
 535       if (newSrc == NULL) {
 536          debug_printf("svga_blit: fails to create temporary src\n");
 537          ret = false;
 538          goto done;
 539       }
 540
 541       /* increment the mksStats for blitter with extra copy */
 542       SVGA_STATS_COUNT_INC(sws, SVGA_STATS_COUNT_BLITBLITTERCOPY);
 543       build_blit_info(newSrc,
 544                       blit.src.level, blit.src.box.x,
 545                       blit.src.box.y, blit.src.box.z,
 546                       blit.src.resource,
 547                       blit.src.level, &blit.src.box,
 548                       &copy_region_blit);
 549       if (!try_copy_region(svga, &copy_region_blit)) {
 550          ret = false;
 551          goto done;
 552       }
 553
 554       blit.src.resource = newSrc;
 555    }
 556
 557    if (!can_create_dst_view) {
 558       struct pipe_resource template;
 559
 560       /*
 561        * If the destination blit format is not compatible with the destination
 562        * resource format, we will not be able to create a render target view.
 563        * In order to avoid falling back to software blit, we'll create
 564        * a new resource in the blit format, and use DXPredCopyRegion
 565        * after the blit to copy from the blit format back to the resource
 566        * format.
 567        */
 568       template = *dst;
 569       template.format = blit.dst.format;
 570       newDst = svga_texture_create(svga->pipe.screen, &template);
 571       if (newDst == NULL) {
 572          debug_printf("svga_blit: fails to create temporary dst\n");
 573          ret = false;
 574          goto done;
 575       }
 576
 577       blit.dst.resource = newDst;
 578    }
 579
 580    svga_toggle_render_condition(svga, blit.render_condition_enable, FALSE);
 581
 582    util_blitter_blit(svga->blitter, &blit);
 583
 584    svga_toggle_render_condition(svga, blit.render_condition_enable, TRUE);
 585
 586    if (blit.dst.resource != dst) {
 587       struct pipe_blit_info copy_region_blit;
 588
 589       /* increment the mksStats for blitter with extra copy */
 590       SVGA_STATS_COUNT_INC(sws, SVGA_STATS_COUNT_BLITBLITTERCOPY);
 591
 592       /*
 593        * A temporary resource was created for the blit, we need to
 594        * copy from the temporary resource back to the original destination.
 595        */
 596       build_blit_info(blit.dst.resource,
 597                       blit.dst.level, blit.dst.box.x,
 598                       blit.dst.box.y, blit.dst.box.z,
 599                       newDst,
 600                       blit.dst.level, &blit.dst.box,
 601                       &copy_region_blit);
 602       if (!try_copy_region(svga, &copy_region_blit)) {
 603          ret = false;
 604          goto done;
 605       }
 606    }
 607
 608 done:
 609    /* unreference the temporary resources if needed */
 610    pipe_resource_reference(&newDst, NULL);
 611    pipe_resource_reference(&newSrc, NULL);
 612
 613    SVGA_STATS_TIME_POP(sws);  /* SVGA_STATS_TIME_BLITBLITTER */
 614    (void) sws;
 615
 616    return ret;
 617 }
 618
 619
 620 /**
 621  * Try a cpu copy_region fallback.
 622  */
 623 static bool
 624 try_cpu_copy_region(struct svga_context *svga,
 625                     const struct pipe_blit_info *blit)
 626 {
 627    if (util_can_blit_via_copy_region(blit, TRUE) ||
 628        util_can_blit_via_copy_region(blit, FALSE)) {
 629
 630       if (svga->render_condition && blit->render_condition_enable) {
 631          debug_warning("CPU copy_region doesn't support "
 632                        "conditional rendering.\n");
 633          return false;
 634       }
 635
 636       copy_region_fallback(svga, blit->dst.resource,
 637                            blit->dst.level,
 638                            blit->dst.box.x, blit->dst.box.y,
 639                            blit->dst.box.z, blit->src.resource,
 640                            blit->src.level, &blit->src.box);
 641       return true;
 642    }
 643
 644    return false;
 645 }
 646
 647
 648 /**
 649  * The pipe::blit member.
 650  */
 651 static void
 652 svga_blit(struct pipe_context *pipe,
 653           const struct pipe_blit_info *blit)
 654 {
 655    struct svga_context *svga = svga_context(pipe);
 656    struct svga_winsys_screen *sws = svga_screen(pipe->screen)->sws;
 657
 658    if (!svga_have_vgpu10(svga) &&
 659        blit->src.resource->nr_samples > 1 &&
 660        blit->dst.resource->nr_samples <= 1 &&
 661        !util_format_is_depth_or_stencil(blit->src.resource->format) &&
 662        !util_format_is_pure_integer(blit->src.resource->format)) {
 663       debug_printf("svga: color resolve unimplemented\n");
 664       return;
 665    }
 666
 667    SVGA_STATS_TIME_PUSH(sws, SVGA_STATS_TIME_BLIT);
 668
 669    if (try_copy_region(svga, blit))
 670       goto done;
 671
 672    if (try_blit(svga, blit))
 673       goto done;
 674
 675    if (!try_cpu_copy_region(svga, blit))
 676       debug_printf("svga: Blit failed.\n");
 677
 678 done:
 679    SVGA_STATS_TIME_POP(sws);  /* SVGA_STATS_TIME_BLIT */
 680    (void) sws;
 681 }
 682
 683
 684 /**
 685  * The pipe::resource_copy_region member.
 686  */
 687 static void
 688 svga_resource_copy_region(struct pipe_context *pipe,
 689                           struct pipe_resource *dst_tex,
 690                           unsigned dst_level,
 691                           unsigned dstx, unsigned dsty, unsigned dstz,
 692                           struct pipe_resource *src_tex,
 693                           unsigned src_level,
 694                           const struct pipe_box *src_box)
 695 {
 696    struct svga_context *svga = svga_context(pipe);
 697    struct svga_winsys_screen *sws = svga_screen(svga->pipe.screen)->sws;
 698
 699    SVGA_STATS_TIME_PUSH(sws, SVGA_STATS_TIME_COPYREGION);
 700
 701    if (dst_tex->target == PIPE_BUFFER && src_tex->target == PIPE_BUFFER) {
 702       /* can't copy within the same buffer, unfortunately */
 703       if (svga_have_vgpu10(svga) && src_tex != dst_tex) {
 704          enum pipe_error ret;
 705          struct svga_winsys_surface *src_surf;
 706          struct svga_winsys_surface *dst_surf;
 707          struct svga_buffer *dbuffer = svga_buffer(dst_tex);
 708
 709          src_surf = svga_buffer_handle(svga, src_tex);
 710          dst_surf = svga_buffer_handle(svga, dst_tex);
 711
 712          ret = SVGA3D_vgpu10_BufferCopy(svga->swc, src_surf, dst_surf,
 713                                         src_box->x, dstx, src_box->width);
 714          if (ret != PIPE_OK) {
 715             svga_context_flush(svga, NULL);
 716             ret = SVGA3D_vgpu10_BufferCopy(svga->swc, src_surf, dst_surf,
 717                                            src_box->x, dstx, src_box->width);
 718             assert(ret == PIPE_OK);
 719          }
 720
 721          dbuffer->dirty = TRUE;
 722       }
 723       else {
 724          /* use map/memcpy fallback */
 725          copy_region_fallback(svga, dst_tex, dst_level, dstx,
 726                               dsty, dstz, src_tex, src_level, src_box);
 727       }
 728    } else {
 729       struct pipe_blit_info blit;
 730
 731       build_blit_info(dst_tex, dst_level, dstx, dsty, dstz,
 732                       src_tex, src_level, src_box, &blit);
 733
 734       if (try_copy_region(svga, &blit))
 735          goto done;
 736
 737       /* Blits are format-converting which is not what we want, so perform a
 738        * strict format-check.
 739        * FIXME: Need to figure out why srgb blits (tf2) and
 740        * 3D blits (piglit) are broken here. Perhaps we set up the
 741        * struct pipe_blit_info incorrectly.
 742        */
 743       if (src_tex->format == dst_tex->format &&
 744           !util_format_is_srgb(src_tex->format) &&
 745           svga_resource_type(src_tex->target) != SVGA3D_RESOURCE_TEXTURE3D &&
 746           try_blit(svga, &blit))
 747          goto done;
 748
 749       copy_region_fallback(svga, dst_tex, dst_level, dstx, dsty, dstz,
 750                            src_tex, src_level, src_box);
 751    }
 752
 753 done:
 754    SVGA_STATS_TIME_POP(sws);
 755    (void) sws;
 756 }
 757
 758
 759 /**
 760  * The pipe::flush_resource member.
 761  */
 762 static void
 763 svga_flush_resource(struct pipe_context *pipe,
 764                     struct pipe_resource *resource)
 765 {
 766 }
 767
 768
 769 /**
 770  * Setup the pipe blit, resource_copy_region and flush_resource members.
 771  */
 772 void
 773 svga_init_blit_functions(struct svga_context *svga)
 774 {
 775    svga->pipe.resource_copy_region = svga_resource_copy_region;
 776    svga->pipe.blit = svga_blit;
 777    svga->pipe.flush_resource = svga_flush_resource;
 778 }