399 lines
10 KiB
C
399 lines
10 KiB
C
/*
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* Copyright © 2009 Red Hat, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Red Hat not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. Red Hat makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
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* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdlib.h>
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#include "pixman-private.h"
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pixman_implementation_t *
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_pixman_implementation_create (pixman_implementation_t *fallback,
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const pixman_fast_path_t *fast_paths)
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{
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pixman_implementation_t *imp;
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assert (fast_paths);
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if ((imp = malloc (sizeof (pixman_implementation_t))))
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{
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pixman_implementation_t *d;
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memset (imp, 0, sizeof *imp);
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imp->fallback = fallback;
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imp->fast_paths = fast_paths;
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/* Make sure the whole fallback chain has the right toplevel */
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for (d = imp; d != NULL; d = d->fallback)
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d->toplevel = imp;
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}
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return imp;
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}
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#define N_CACHED_FAST_PATHS 8
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typedef struct
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{
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struct
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{
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pixman_implementation_t * imp;
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pixman_fast_path_t fast_path;
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} cache [N_CACHED_FAST_PATHS];
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} cache_t;
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PIXMAN_DEFINE_THREAD_LOCAL (cache_t, fast_path_cache);
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static void
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dummy_composite_rect (pixman_implementation_t *imp,
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pixman_composite_info_t *info)
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{
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}
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void
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_pixman_implementation_lookup_composite (pixman_implementation_t *toplevel,
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pixman_op_t op,
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pixman_format_code_t src_format,
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uint32_t src_flags,
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pixman_format_code_t mask_format,
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uint32_t mask_flags,
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pixman_format_code_t dest_format,
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uint32_t dest_flags,
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pixman_implementation_t **out_imp,
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pixman_composite_func_t *out_func)
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{
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pixman_implementation_t *imp;
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cache_t *cache;
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int i;
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/* Check cache for fast paths */
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cache = PIXMAN_GET_THREAD_LOCAL (fast_path_cache);
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for (i = 0; i < N_CACHED_FAST_PATHS; ++i)
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{
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const pixman_fast_path_t *info = &(cache->cache[i].fast_path);
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/* Note that we check for equality here, not whether
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* the cached fast path matches. This is to prevent
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* us from selecting an overly general fast path
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* when a more specific one would work.
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*/
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if (info->op == op &&
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info->src_format == src_format &&
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info->mask_format == mask_format &&
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info->dest_format == dest_format &&
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info->src_flags == src_flags &&
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info->mask_flags == mask_flags &&
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info->dest_flags == dest_flags &&
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info->func)
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{
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*out_imp = cache->cache[i].imp;
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*out_func = cache->cache[i].fast_path.func;
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goto update_cache;
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}
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}
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for (imp = toplevel; imp != NULL; imp = imp->fallback)
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{
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const pixman_fast_path_t *info = imp->fast_paths;
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while (info->op != PIXMAN_OP_NONE)
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{
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if ((info->op == op || info->op == PIXMAN_OP_any) &&
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/* Formats */
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((info->src_format == src_format) ||
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(info->src_format == PIXMAN_any)) &&
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((info->mask_format == mask_format) ||
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(info->mask_format == PIXMAN_any)) &&
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((info->dest_format == dest_format) ||
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(info->dest_format == PIXMAN_any)) &&
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/* Flags */
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(info->src_flags & src_flags) == info->src_flags &&
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(info->mask_flags & mask_flags) == info->mask_flags &&
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(info->dest_flags & dest_flags) == info->dest_flags)
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{
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*out_imp = imp;
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*out_func = info->func;
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/* Set i to the last spot in the cache so that the
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* move-to-front code below will work
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*/
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i = N_CACHED_FAST_PATHS - 1;
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goto update_cache;
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}
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++info;
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}
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}
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/* We should never reach this point */
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_pixman_log_error (
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FUNC,
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"No composite function found\n"
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"\n"
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"The most likely cause of this is that this system has issues with\n"
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"thread local storage\n");
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*out_imp = NULL;
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*out_func = dummy_composite_rect;
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return;
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update_cache:
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if (i)
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{
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while (i--)
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cache->cache[i + 1] = cache->cache[i];
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cache->cache[0].imp = *out_imp;
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cache->cache[0].fast_path.op = op;
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cache->cache[0].fast_path.src_format = src_format;
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cache->cache[0].fast_path.src_flags = src_flags;
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cache->cache[0].fast_path.mask_format = mask_format;
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cache->cache[0].fast_path.mask_flags = mask_flags;
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cache->cache[0].fast_path.dest_format = dest_format;
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cache->cache[0].fast_path.dest_flags = dest_flags;
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cache->cache[0].fast_path.func = *out_func;
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}
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}
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static void
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dummy_combine (pixman_implementation_t *imp,
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pixman_op_t op,
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uint32_t * pd,
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const uint32_t * ps,
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const uint32_t * pm,
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int w)
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{
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}
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pixman_combine_32_func_t
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_pixman_implementation_lookup_combiner (pixman_implementation_t *imp,
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pixman_op_t op,
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pixman_bool_t component_alpha,
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pixman_bool_t narrow)
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{
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while (imp)
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{
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pixman_combine_32_func_t f = NULL;
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switch ((narrow << 1) | component_alpha)
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{
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case 0: /* not narrow, not component alpha */
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f = (pixman_combine_32_func_t)imp->combine_float[op];
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break;
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case 1: /* not narrow, component_alpha */
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f = (pixman_combine_32_func_t)imp->combine_float_ca[op];
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break;
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case 2: /* narrow, not component alpha */
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f = imp->combine_32[op];
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break;
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case 3: /* narrow, component_alpha */
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f = imp->combine_32_ca[op];
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break;
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}
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if (f)
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return f;
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imp = imp->fallback;
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}
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/* We should never reach this point */
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_pixman_log_error (FUNC, "No known combine function\n");
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return dummy_combine;
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}
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pixman_bool_t
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_pixman_implementation_blt (pixman_implementation_t * imp,
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uint32_t * src_bits,
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uint32_t * dst_bits,
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int src_stride,
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int dst_stride,
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int src_bpp,
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int dst_bpp,
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int src_x,
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int src_y,
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int dest_x,
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int dest_y,
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int width,
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int height)
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{
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while (imp)
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{
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if (imp->blt &&
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(*imp->blt) (imp, src_bits, dst_bits, src_stride, dst_stride,
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src_bpp, dst_bpp, src_x, src_y, dest_x, dest_y,
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width, height))
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{
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return TRUE;
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}
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imp = imp->fallback;
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}
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return FALSE;
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}
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pixman_bool_t
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_pixman_implementation_fill (pixman_implementation_t *imp,
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uint32_t * bits,
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int stride,
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int bpp,
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int x,
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int y,
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int width,
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int height,
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uint32_t filler)
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{
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while (imp)
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{
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if (imp->fill &&
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((*imp->fill) (imp, bits, stride, bpp, x, y, width, height, filler)))
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{
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return TRUE;
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}
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imp = imp->fallback;
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}
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return FALSE;
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}
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pixman_bool_t
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_pixman_implementation_src_iter_init (pixman_implementation_t *imp,
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pixman_iter_t *iter,
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pixman_image_t *image,
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int x,
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int y,
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int width,
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int height,
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uint8_t *buffer,
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iter_flags_t iter_flags,
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uint32_t image_flags)
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{
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iter->image = image;
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iter->buffer = (uint32_t *)buffer;
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iter->x = x;
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iter->y = y;
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iter->width = width;
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iter->height = height;
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iter->iter_flags = iter_flags;
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iter->image_flags = image_flags;
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while (imp)
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{
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if (imp->src_iter_init && (*imp->src_iter_init) (imp, iter))
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return TRUE;
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imp = imp->fallback;
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}
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return FALSE;
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}
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pixman_bool_t
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_pixman_implementation_dest_iter_init (pixman_implementation_t *imp,
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pixman_iter_t *iter,
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pixman_image_t *image,
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int x,
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int y,
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int width,
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int height,
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uint8_t *buffer,
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iter_flags_t iter_flags,
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uint32_t image_flags)
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{
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iter->image = image;
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iter->buffer = (uint32_t *)buffer;
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iter->x = x;
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iter->y = y;
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iter->width = width;
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iter->height = height;
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iter->iter_flags = iter_flags;
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iter->image_flags = image_flags;
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while (imp)
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{
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if (imp->dest_iter_init && (*imp->dest_iter_init) (imp, iter))
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return TRUE;
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imp = imp->fallback;
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}
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return FALSE;
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}
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pixman_bool_t
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_pixman_disabled (const char *name)
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{
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const char *env;
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if ((env = getenv ("PIXMAN_DISABLE")))
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{
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do
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{
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const char *end;
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int len;
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if ((end = strchr (env, ' ')))
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len = end - env;
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else
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len = strlen (env);
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if (strlen (name) == len && strncmp (name, env, len) == 0)
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{
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fprintf (stderr, "pixman: Disabled %s implementation\n", name);
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return TRUE;
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}
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env += len;
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}
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while (*env++);
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}
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return FALSE;
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}
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pixman_implementation_t *
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_pixman_choose_implementation (void)
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{
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pixman_implementation_t *imp;
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imp = _pixman_implementation_create_general();
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if (!_pixman_disabled ("fast"))
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imp = _pixman_implementation_create_fast_path (imp);
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imp = _pixman_x86_get_implementations (imp);
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imp = _pixman_implementation_create_noop (imp);
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return imp;
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}
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