diff options
Diffstat (limited to 'src/gallium/auxiliary/draw/draw_pt_vsplit.c')
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_pt_vsplit.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pt_vsplit.c b/src/gallium/auxiliary/draw/draw_pt_vsplit.c new file mode 100644 index 0000000000..a687525309 --- /dev/null +++ b/src/gallium/auxiliary/draw/draw_pt_vsplit.c @@ -0,0 +1,208 @@ +/* + * Mesa 3-D graphics library + * Version: 7.9 + * + * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas. + * Copyright (C) 2010 LunarG Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include "util/u_math.h" +#include "util/u_memory.h" + +#include "draw/draw_context.h" +#include "draw/draw_private.h" +#include "draw/draw_pt.h" + +#define SEGMENT_SIZE 1024 +#define MAP_SIZE 256 + +struct vsplit_frontend { + struct draw_pt_front_end base; + struct draw_context *draw; + + unsigned prim; + + struct draw_pt_middle_end *middle; + + unsigned max_vertices; + ushort segment_size; + + /* buffers for splitting */ + unsigned fetch_elts[SEGMENT_SIZE]; + ushort draw_elts[SEGMENT_SIZE]; + ushort identity_draw_elts[SEGMENT_SIZE]; + + struct { + /* map a fetch element to a draw element */ + unsigned fetches[MAP_SIZE]; + ushort draws[MAP_SIZE]; + boolean has_max_fetch; + + ushort num_fetch_elts; + ushort num_draw_elts; + } cache; +}; + + +static void +vsplit_clear_cache(struct vsplit_frontend *vsplit) +{ + memset(vsplit->cache.fetches, 0xff, sizeof(vsplit->cache.fetches)); + vsplit->cache.has_max_fetch = FALSE; + vsplit->cache.num_fetch_elts = 0; + vsplit->cache.num_draw_elts = 0; +} + +static void +vsplit_flush_cache(struct vsplit_frontend *vsplit, unsigned flags) +{ + vsplit->middle->run(vsplit->middle, + vsplit->fetch_elts, vsplit->cache.num_fetch_elts, + vsplit->draw_elts, vsplit->cache.num_draw_elts, flags); +} + +/** + * Add a fetch element and add it to the draw elements. + */ +static INLINE void +vsplit_add_cache(struct vsplit_frontend *vsplit, unsigned fetch) +{ + unsigned hash = fetch % MAP_SIZE; + + if (vsplit->cache.fetches[hash] != fetch) { + /* update cache */ + vsplit->cache.fetches[hash] = fetch; + vsplit->cache.draws[hash] = vsplit->cache.num_fetch_elts; + + /* add fetch */ + assert(vsplit->cache.num_fetch_elts < vsplit->segment_size); + vsplit->fetch_elts[vsplit->cache.num_fetch_elts++] = fetch; + } + + vsplit->draw_elts[vsplit->cache.num_draw_elts++] = vsplit->cache.draws[hash]; +} + + +/** + * Add a fetch element and add it to the draw elements. The fetch element is + * in full range (uint). + */ +static INLINE void +vsplit_add_cache_uint(struct vsplit_frontend *vsplit, unsigned fetch) +{ + /* special care for 0xffffffff */ + if (fetch == 0xffffffff && !vsplit->cache.has_max_fetch) { + unsigned hash = fetch % MAP_SIZE; + vsplit->cache.fetches[hash] = fetch - 1; /* force update */ + vsplit->cache.has_max_fetch = TRUE; + } + + vsplit_add_cache(vsplit, fetch); +} + + +#define FUNC vsplit_run_linear +#include "draw_pt_vsplit_tmp.h" + +#define FUNC vsplit_run_ubyte +#define ELT_TYPE ubyte +#define ADD_CACHE(vsplit, fetch) vsplit_add_cache(vsplit, fetch) +#include "draw_pt_vsplit_tmp.h" + +#define FUNC vsplit_run_ushort +#define ELT_TYPE ushort +#define ADD_CACHE(vsplit, fetch) vsplit_add_cache(vsplit, fetch) +#include "draw_pt_vsplit_tmp.h" + +#define FUNC vsplit_run_uint +#define ELT_TYPE uint +#define ADD_CACHE(vsplit, fetch) vsplit_add_cache_uint(vsplit, fetch) +#include "draw_pt_vsplit_tmp.h" + + +static void vsplit_prepare(struct draw_pt_front_end *frontend, + unsigned in_prim, + struct draw_pt_middle_end *middle, + unsigned opt) +{ + struct vsplit_frontend *vsplit = (struct vsplit_frontend *) frontend; + + switch (vsplit->draw->pt.user.eltSize) { + case 0: + vsplit->base.run = vsplit_run_linear; + break; + case 1: + vsplit->base.run = vsplit_run_ubyte; + break; + case 2: + vsplit->base.run = vsplit_run_ushort; + break; + case 4: + vsplit->base.run = vsplit_run_uint; + break; + default: + assert(0); + break; + } + + /* split only */ + vsplit->prim = in_prim; + + vsplit->middle = middle; + middle->prepare(middle, vsplit->prim, opt, &vsplit->max_vertices); + + vsplit->segment_size = MIN2(SEGMENT_SIZE, vsplit->max_vertices); +} + + +static void vsplit_finish(struct draw_pt_front_end *frontend) +{ + struct vsplit_frontend *vsplit = (struct vsplit_frontend *) frontend; + vsplit->middle->finish(vsplit->middle); + vsplit->middle = NULL; +} + + +static void vsplit_destroy(struct draw_pt_front_end *frontend) +{ + FREE(frontend); +} + + +struct draw_pt_front_end *draw_pt_vsplit(struct draw_context *draw) +{ + struct vsplit_frontend *vsplit = CALLOC_STRUCT(vsplit_frontend); + ushort i; + + if (!vsplit) + return NULL; + + vsplit->base.prepare = vsplit_prepare; + vsplit->base.run = NULL; + vsplit->base.finish = vsplit_finish; + vsplit->base.destroy = vsplit_destroy; + vsplit->draw = draw; + + for (i = 0; i < SEGMENT_SIZE; i++) + vsplit->identity_draw_elts[i] = i; + + return &vsplit->base; +} |