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_simple_shaders.h"
  49 #include "util/u_surface.h"
  50 #include "util/u_rect.h"
  51
  52 #include "cso_cache/cso_context.h"
  53
  54
  55 struct blit_state
  56 {
  57    struct pipe_context *pipe;
  58    struct cso_context *cso;
  59
  60    struct pipe_blend_state blend;
  61    struct pipe_depth_stencil_alpha_state depthstencil;
  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
  67    void *vs;
  68    void *fs[TGSI_WRITEMASK_XYZW + 1];
  69
  70    struct pipe_buffer *vbuf;  /**< quad vertices */
  71    unsigned vbuf_slot;
  72
  73    float vertices[4][2][4];   /**< vertex/texcoords for quad */
  74 };
  75
  76
  77 /**
  78  * Create state object for blit.
  79  * Intended to be created once and re-used for many blit() calls.
  80  */
  81 struct blit_state *
  82 util_create_blit(struct pipe_context *pipe, struct cso_context *cso)
  83 {
  84    struct blit_state *ctx;
  85    uint i;
  86
  87    ctx = CALLOC_STRUCT(blit_state);
  88    if (!ctx)
  89       return NULL;
  90
  91    ctx->pipe = pipe;
  92    ctx->cso = cso;
  93
  94    /* disabled blending/masking */
  95    memset(&ctx->blend, 0, sizeof(ctx->blend));
  96    ctx->blend.rt[0].colormask = PIPE_MASK_RGBA;
  97
  98    /* no-op depth/stencil/alpha */
  99    memset(&ctx->depthstencil, 0, sizeof(ctx->depthstencil));
 100
 101    /* rasterizer */
 102    memset(&ctx->rasterizer, 0, sizeof(ctx->rasterizer));
 103    ctx->rasterizer.front_winding = PIPE_WINDING_CW;
 104    ctx->rasterizer.cull_mode = PIPE_WINDING_NONE;
 105    ctx->rasterizer.gl_rasterization_rules = 1;
 106
 107    /* samplers */
 108    memset(&ctx->sampler, 0, sizeof(ctx->sampler));
 109    ctx->sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 110    ctx->sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 111    ctx->sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 112    ctx->sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 113    ctx->sampler.min_img_filter = 0; /* set later */
 114    ctx->sampler.mag_img_filter = 0; /* set later */
 115    ctx->sampler.normalized_coords = 1;
 116
 117    /* vertex shader - still required to provide the linkage between
 118     * fragment shader input semantics and vertex_element/buffers.
 119     */
 120    {
 121       const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
 122                                       TGSI_SEMANTIC_GENERIC };
 123       const uint semantic_indexes[] = { 0, 0 };
 124       ctx->vs = util_make_vertex_passthrough_shader(pipe, 2, semantic_names,
 125                                                     semantic_indexes);
 126    }
 127
 128    /* fragment shader */
 129    ctx->fs[TGSI_WRITEMASK_XYZW] =
 130       util_make_fragment_tex_shader(pipe, TGSI_TEXTURE_2D);
 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    return ctx;
 141 }
 142
 143
 144 /**
 145  * Destroy a blit context
 146  */
 147 void
 148 util_destroy_blit(struct blit_state *ctx)
 149 {
 150    struct pipe_context *pipe = ctx->pipe;
 151    unsigned i;
 152
 153    pipe->delete_vs_state(pipe, ctx->vs);
 154
 155    for (i = 0; i < Elements(ctx->fs); i++)
 156       if (ctx->fs[i])
 157          pipe->delete_fs_state(pipe, ctx->fs[i]);
 158
 159    pipe_buffer_reference(&ctx->vbuf, NULL);
 160
 161    FREE(ctx);
 162 }
 163
 164
 165 /**
 166  * Get offset of next free slot in vertex buffer for quad vertices.
 167  */
 168 static unsigned
 169 get_next_slot( struct blit_state *ctx )
 170 {
 171    const unsigned max_slots = 4096 / sizeof ctx->vertices;
 172
 173    if (ctx->vbuf_slot >= max_slots)
 174       util_blit_flush( ctx );
 175
 176    if (!ctx->vbuf) {
 177       ctx->vbuf = pipe_buffer_create(ctx->pipe->screen,
 178                                      32,
 179                                      PIPE_BUFFER_USAGE_VERTEX,
 180                                      max_slots * sizeof ctx->vertices);
 181    }
 182
 183    return ctx->vbuf_slot++ * sizeof ctx->vertices;
 184 }
 185
 186
 187
 188
 189
 190 /**
 191  * Setup vertex data for the textured quad we'll draw.
 192  * Note: y=0=top
 193  */
 194 static unsigned
 195 setup_vertex_data_tex(struct blit_state *ctx,
 196                       float x0, float y0, float x1, float y1,
 197                       float s0, float t0, float s1, float t1,
 198                       float z)
 199 {
 200    unsigned offset;
 201
 202    ctx->vertices[0][0][0] = x0;
 203    ctx->vertices[0][0][1] = y0;
 204    ctx->vertices[0][0][2] = z;
 205    ctx->vertices[0][1][0] = s0; /*s*/
 206    ctx->vertices[0][1][1] = t0; /*t*/
 207
 208    ctx->vertices[1][0][0] = x1;
 209    ctx->vertices[1][0][1] = y0;
 210    ctx->vertices[1][0][2] = z;
 211    ctx->vertices[1][1][0] = s1; /*s*/
 212    ctx->vertices[1][1][1] = t0; /*t*/
 213
 214    ctx->vertices[2][0][0] = x1;
 215    ctx->vertices[2][0][1] = y1;
 216    ctx->vertices[2][0][2] = z;
 217    ctx->vertices[2][1][0] = s1;
 218    ctx->vertices[2][1][1] = t1;
 219
 220    ctx->vertices[3][0][0] = x0;
 221    ctx->vertices[3][0][1] = y1;
 222    ctx->vertices[3][0][2] = z;
 223    ctx->vertices[3][1][0] = s0;
 224    ctx->vertices[3][1][1] = t1;
 225
 226    offset = get_next_slot( ctx );
 227
 228    pipe_buffer_write_nooverlap(ctx->pipe->screen, ctx->vbuf,
 229                                offset, sizeof(ctx->vertices), ctx->vertices);
 230
 231    return offset;
 232 }
 233
 234
 235 /**
 236  * \return TRUE if two regions overlap, FALSE otherwise
 237  */
 238 static boolean
 239 regions_overlap(int srcX0, int srcY0,
 240                 int srcX1, int srcY1,
 241                 int dstX0, int dstY0,
 242                 int dstX1, int dstY1)
 243 {
 244    if (MAX2(srcX0, srcX1) < MIN2(dstX0, dstX1))
 245       return FALSE; /* src completely left of dst */
 246
 247    if (MAX2(dstX0, dstX1) < MIN2(srcX0, srcX1))
 248       return FALSE; /* dst completely left of src */
 249
 250    if (MAX2(srcY0, srcY1) < MIN2(dstY0, dstY1))
 251       return FALSE; /* src completely above dst */
 252
 253    if (MAX2(dstY0, dstY1) < MIN2(srcY0, srcY1))
 254       return FALSE; /* dst completely above src */
 255
 256    return TRUE; /* some overlap */
 257 }
 258
 259
 260 /**
 261  * Copy pixel block from src surface to dst surface.
 262  * Overlapping regions are acceptable.
 263  * Flipping and stretching are supported.
 264  * \param filter  one of PIPE_TEX_MIPFILTER_NEAREST/LINEAR
 265  * \param writemask  controls which channels in the dest surface are sourced
 266  *                   from the src surface.  Disabled channels are sourced
 267  *                   from (0,0,0,1).
 268  * XXX need some control over blitting Z and/or stencil.
 269  */
 270 void
 271 util_blit_pixels_writemask(struct blit_state *ctx,
 272                            struct pipe_surface *src,
 273                            int srcX0, int srcY0,
 274                            int srcX1, int srcY1,
 275                            struct pipe_surface *dst,
 276                            int dstX0, int dstY0,
 277                            int dstX1, int dstY1,
 278                            float z, uint filter,
 279                            uint writemask)
 280 {
 281    struct pipe_context *pipe = ctx->pipe;
 282    struct pipe_screen *screen = pipe->screen;
 283    struct pipe_texture *tex = NULL;
 284    struct pipe_framebuffer_state fb;
 285    const int srcW = abs(srcX1 - srcX0);
 286    const int srcH = abs(srcY1 - srcY0);
 287    unsigned offset;
 288    boolean overlap;
 289    float s0, t0, s1, t1;
 290
 291    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 292           filter == PIPE_TEX_MIPFILTER_LINEAR);
 293
 294    assert(screen->is_format_supported(screen, src->format, PIPE_TEXTURE_2D,
 295                                       PIPE_TEXTURE_USAGE_SAMPLER, 0));
 296    assert(screen->is_format_supported(screen, dst->format, PIPE_TEXTURE_2D,
 297                                       PIPE_TEXTURE_USAGE_RENDER_TARGET, 0));
 298
 299    /* do the regions overlap? */
 300    overlap = util_same_surface(src, dst) &&
 301       regions_overlap(srcX0, srcY0, srcX1, srcY1,
 302                       dstX0, dstY0, dstX1, dstY1);
 303
 304    /*
 305     * Check for simple case:  no format conversion, no flipping, no stretching,
 306     * no overlapping.
 307     * Filter mode should not matter since there's no stretching.
 308     */
 309    if (pipe->surface_copy &&
 310        dst->format == src->format &&
 311        srcX0 < srcX1 &&
 312        dstX0 < dstX1 &&
 313        srcY0 < srcY1 &&
 314        dstY0 < dstY1 &&
 315        (dstX1 - dstX0) == (srcX1 - srcX0) &&
 316        (dstY1 - dstY0) == (srcY1 - srcY0) &&
 317        !overlap) {
 318       pipe->surface_copy(pipe,
 319                          dst, dstX0, dstY0, /* dest */
 320                          src, srcX0, srcY0, /* src */
 321                          srcW, srcH);       /* size */
 322       return;
 323    }
 324
 325    assert(screen->is_format_supported(screen, dst->format, PIPE_TEXTURE_2D,
 326                                       PIPE_TEXTURE_USAGE_RENDER_TARGET, 0));
 327
 328    /* Create a temporary texture when src and dest alias or when src
 329     * is anything other than a single-level 2d texture.
 330     *
 331     * This can still be improved upon.
 332     */
 333    if (util_same_surface(src, dst) ||
 334        src->texture->target != PIPE_TEXTURE_2D ||
 335        src->texture->last_level != 0)
 336    {
 337       struct pipe_texture texTemp;
 338       struct pipe_surface *texSurf;
 339       const int srcLeft = MIN2(srcX0, srcX1);
 340       const int srcTop = MIN2(srcY0, srcY1);
 341
 342       if (srcLeft != srcX0) {
 343          /* left-right flip */
 344          int tmp = dstX0;
 345          dstX0 = dstX1;
 346          dstX1 = tmp;
 347       }
 348
 349       if (srcTop != srcY0) {
 350          /* up-down flip */
 351          int tmp = dstY0;
 352          dstY0 = dstY1;
 353          dstY1 = tmp;
 354       }
 355
 356       /* create temp texture */
 357       memset(&texTemp, 0, sizeof(texTemp));
 358       texTemp.target = PIPE_TEXTURE_2D;
 359       texTemp.format = src->format;
 360       texTemp.last_level = 0;
 361       texTemp.width0 = srcW;
 362       texTemp.height0 = srcH;
 363       texTemp.depth0 = 1;
 364
 365       tex = screen->texture_create(screen, &texTemp);
 366       if (!tex)
 367          return;
 368
 369       texSurf = screen->get_tex_surface(screen, tex, 0, 0, 0,
 370                                         PIPE_BUFFER_USAGE_GPU_WRITE);
 371
 372       /* load temp texture */
 373       if (pipe->surface_copy) {
 374          pipe->surface_copy(pipe,
 375                             texSurf, 0, 0,   /* dest */
 376                             src, srcLeft, srcTop, /* src */
 377                             srcW, srcH);     /* size */
 378       } else {
 379          util_surface_copy(pipe, FALSE,
 380                            texSurf, 0, 0,   /* dest */
 381                            src, srcLeft, srcTop, /* src */
 382                            srcW, srcH);     /* size */
 383       }
 384
 385       /* free the surface, update the texture if necessary.
 386        */
 387       pipe_surface_reference(&texSurf, NULL);
 388       s0 = 0.0f;
 389       s1 = 1.0f;
 390       t0 = 0.0f;
 391       t1 = 1.0f;
 392    }
 393    else {
 394       pipe_texture_reference(&tex, src->texture);
 395       s0 = srcX0 / (float)tex->width0;
 396       s1 = srcX1 / (float)tex->width0;
 397       t0 = srcY0 / (float)tex->height0;
 398       t1 = srcY1 / (float)tex->height0;
 399    }
 400
 401
 402    /* save state (restored below) */
 403    cso_save_blend(ctx->cso);
 404    cso_save_depth_stencil_alpha(ctx->cso);
 405    cso_save_rasterizer(ctx->cso);
 406    cso_save_samplers(ctx->cso);
 407    cso_save_sampler_textures(ctx->cso);
 408    cso_save_viewport(ctx->cso);
 409    cso_save_framebuffer(ctx->cso);
 410    cso_save_fragment_shader(ctx->cso);
 411    cso_save_vertex_shader(ctx->cso);
 412    cso_save_clip(ctx->cso);
 413
 414    /* set misc state we care about */
 415    cso_set_blend(ctx->cso, &ctx->blend);
 416    cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil);
 417    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 418    cso_set_clip(ctx->cso, &ctx->clip);
 419
 420    /* sampler */
 421    ctx->sampler.min_img_filter = filter;
 422    ctx->sampler.mag_img_filter = filter;
 423    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 424    cso_single_sampler_done(ctx->cso);
 425
 426    /* viewport */
 427    ctx->viewport.scale[0] = 0.5f * dst->width;
 428    ctx->viewport.scale[1] = 0.5f * dst->height;
 429    ctx->viewport.scale[2] = 1.0f;
 430    ctx->viewport.scale[3] = 1.0f;
 431    ctx->viewport.translate[0] = 0.5f * dst->width;
 432    ctx->viewport.translate[1] = 0.5f * dst->height;
 433    ctx->viewport.translate[2] = 0.0f;
 434    ctx->viewport.translate[3] = 0.0f;
 435    cso_set_viewport(ctx->cso, &ctx->viewport);
 436
 437    /* texture */
 438    cso_set_sampler_textures(ctx->cso, 1, &tex);
 439
 440    if (ctx->fs[writemask] == NULL)
 441       ctx->fs[writemask] =
 442          util_make_fragment_tex_shader_writemask(pipe, TGSI_TEXTURE_2D,
 443                                                  writemask);
 444
 445    /* shaders */
 446    cso_set_fragment_shader_handle(ctx->cso, ctx->fs[writemask]);
 447    cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
 448
 449    /* drawing dest */
 450    memset(&fb, 0, sizeof(fb));
 451    fb.width = dst->width;
 452    fb.height = dst->height;
 453    fb.nr_cbufs = 1;
 454    fb.cbufs[0] = dst;
 455    cso_set_framebuffer(ctx->cso, &fb);
 456
 457    /* draw quad */
 458    offset = setup_vertex_data_tex(ctx,
 459                                   (float) dstX0, (float) dstY0,
 460                                   (float) dstX1, (float) dstY1,
 461                                   s0, t0,
 462                                   s1, t1,
 463                                   z);
 464
 465    util_draw_vertex_buffer(ctx->pipe, ctx->vbuf, offset,
 466                            PIPE_PRIM_TRIANGLE_FAN,
 467                            4,  /* verts */
 468                            2); /* attribs/vert */
 469
 470    /* restore state we changed */
 471    cso_restore_blend(ctx->cso);
 472    cso_restore_depth_stencil_alpha(ctx->cso);
 473    cso_restore_rasterizer(ctx->cso);
 474    cso_restore_samplers(ctx->cso);
 475    cso_restore_sampler_textures(ctx->cso);
 476    cso_restore_viewport(ctx->cso);
 477    cso_restore_framebuffer(ctx->cso);
 478    cso_restore_fragment_shader(ctx->cso);
 479    cso_restore_vertex_shader(ctx->cso);
 480    cso_restore_clip(ctx->cso);
 481
 482    pipe_texture_reference(&tex, NULL);
 483 }
 484
 485
 486 void
 487 util_blit_pixels(struct blit_state *ctx,
 488                  struct pipe_surface *src,
 489                  int srcX0, int srcY0,
 490                  int srcX1, int srcY1,
 491                  struct pipe_surface *dst,
 492                  int dstX0, int dstY0,
 493                  int dstX1, int dstY1,
 494                  float z, uint filter )
 495 {
 496    util_blit_pixels_writemask( ctx, src,
 497                                srcX0, srcY0,
 498                                srcX1, srcY1,
 499                                dst,
 500                                dstX0, dstY0,
 501                                dstX1, dstY1,
 502                                z, filter,
 503                                TGSI_WRITEMASK_XYZW );
 504 }
 505
 506
 507 /* Release vertex buffer at end of frame to avoid synchronous
 508  * rendering.
 509  */
 510 void util_blit_flush( struct blit_state *ctx )
 511 {
 512    pipe_buffer_reference(&ctx->vbuf, NULL);
 513    ctx->vbuf_slot = 0;
 514 }
 515
 516
 517
 518 /**
 519  * Copy pixel block from src texture to dst surface.
 520  * Overlapping regions are acceptable.
 521  *
 522  * XXX Should support selection of level.
 523  * XXX need some control over blitting Z and/or stencil.
 524  */
 525 void
 526 util_blit_pixels_tex(struct blit_state *ctx,
 527                  struct pipe_texture *tex,
 528                  int srcX0, int srcY0,
 529                  int srcX1, int srcY1,
 530                  struct pipe_surface *dst,
 531                  int dstX0, int dstY0,
 532                  int dstX1, int dstY1,
 533                  float z, uint filter)
 534 {
 535    struct pipe_framebuffer_state fb;
 536    float s0, t0, s1, t1;
 537    unsigned offset;
 538
 539    assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
 540           filter == PIPE_TEX_MIPFILTER_LINEAR);
 541
 542    assert(tex->width0 != 0);
 543    assert(tex->height0 != 0);
 544
 545    s0 = srcX0 / (float)tex->width0;
 546    s1 = srcX1 / (float)tex->width0;
 547    t0 = srcY0 / (float)tex->height0;
 548    t1 = srcY1 / (float)tex->height0;
 549
 550    assert(ctx->pipe->screen->is_format_supported(ctx->pipe->screen, dst->format,
 551                                                  PIPE_TEXTURE_2D,
 552                                                  PIPE_TEXTURE_USAGE_RENDER_TARGET,
 553                                                  0));
 554
 555    /* save state (restored below) */
 556    cso_save_blend(ctx->cso);
 557    cso_save_depth_stencil_alpha(ctx->cso);
 558    cso_save_rasterizer(ctx->cso);
 559    cso_save_samplers(ctx->cso);
 560    cso_save_sampler_textures(ctx->cso);
 561    cso_save_framebuffer(ctx->cso);
 562    cso_save_fragment_shader(ctx->cso);
 563    cso_save_vertex_shader(ctx->cso);
 564    cso_save_clip(ctx->cso);
 565
 566    /* set misc state we care about */
 567    cso_set_blend(ctx->cso, &ctx->blend);
 568    cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil);
 569    cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
 570    cso_set_clip(ctx->cso, &ctx->clip);
 571
 572    /* sampler */
 573    ctx->sampler.min_img_filter = filter;
 574    ctx->sampler.mag_img_filter = filter;
 575    cso_single_sampler(ctx->cso, 0, &ctx->sampler);
 576    cso_single_sampler_done(ctx->cso);
 577
 578    /* texture */
 579    cso_set_sampler_textures(ctx->cso, 1, &tex);
 580
 581    /* shaders */
 582    cso_set_fragment_shader_handle(ctx->cso, ctx->fs[TGSI_WRITEMASK_XYZW]);
 583    cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
 584
 585    /* drawing dest */
 586    memset(&fb, 0, sizeof(fb));
 587    fb.width = dst->width;
 588    fb.height = dst->height;
 589    fb.nr_cbufs = 1;
 590    fb.cbufs[0] = dst;
 591    cso_set_framebuffer(ctx->cso, &fb);
 592
 593    /* draw quad */
 594    offset = setup_vertex_data_tex(ctx,
 595                                   (float) dstX0, (float) dstY0,
 596                                   (float) dstX1, (float) dstY1,
 597                                   s0, t0, s1, t1,
 598                                   z);
 599
 600    util_draw_vertex_buffer(ctx->pipe,
 601                            ctx->vbuf, offset,
 602                            PIPE_PRIM_TRIANGLE_FAN,
 603                            4,  /* verts */
 604                            2); /* attribs/vert */
 605
 606    /* restore state we changed */
 607    cso_restore_blend(ctx->cso);
 608    cso_restore_depth_stencil_alpha(ctx->cso);
 609    cso_restore_rasterizer(ctx->cso);
 610    cso_restore_samplers(ctx->cso);
 611    cso_restore_sampler_textures(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 }