mirror of https://github.com/GNOME/gimp.git
313 lines
7.2 KiB
C
313 lines
7.2 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pixel_processor.c: Copyright (C) 1999 Jay Cox <jaycox@earthlink.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include "pixel_processor.h"
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#include "pixel_region.h"
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#include "pixel_regionP.h"
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#include "gimprc.h"
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef ENABLE_MP
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#include <pthread.h>
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#define IF_THREAD(statement) statement
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#else /* !ENABLE_MP */
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#define IF_THREAD(statement)
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#endif /* ENABLE_MP */
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typedef void (*p1_func)(void *, PixelRegion *);
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typedef void (*p2_func)(void *, PixelRegion * ,PixelRegion *);
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typedef void (*p3_func)(void *, PixelRegion * ,PixelRegion *, PixelRegion *);
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typedef void (*p4_func)(void *, PixelRegion * ,PixelRegion *, PixelRegion *,
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PixelRegion *);
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struct _PixelProcessor
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{
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void *data;
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p_func f;
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PixelRegionIterator *PRI;
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IF_THREAD(pthread_mutex_t mutex;)
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int nthreads;
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int n_regions;
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PixelRegion *r[4];
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void *progress_report_data;
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ProgressReportFunc progress_report_func;
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};
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static void *
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do_parallel_regions(PixelProcessor *p_s)
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{
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PixelRegion tr[4];
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int ntiles = 0;
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int i;
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int cont = 1;
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IF_THREAD(pthread_mutex_lock(&p_s->mutex);)
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if (p_s->nthreads != 0 && p_s->PRI)
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p_s->PRI = (PixelRegionIterator*)pixel_regions_process(p_s->PRI);
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if (p_s->PRI == NULL)
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{
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IF_THREAD(pthread_mutex_unlock(&p_s->mutex);)
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return NULL;
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}
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p_s->nthreads++;
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do
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{
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for (i = 0; i < p_s->n_regions; i++)
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if (p_s->r[i])
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{
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memcpy(&tr[i], p_s->r[i], sizeof(PixelRegion));
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IF_THREAD(
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if (tr[i].tiles)
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tile_lock(tr[i].curtile);
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)
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}
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IF_THREAD(pthread_mutex_unlock(&p_s->mutex);)
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ntiles++;
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switch(p_s->n_regions)
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{
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case 1:
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((p1_func)p_s->f)(p_s->data,
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p_s->r[0] ? &tr[0] : NULL);
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break;
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case 2:
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((p2_func)p_s->f)(p_s->data,
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p_s->r[0] ? &tr[0] : NULL,
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p_s->r[1] ? &tr[1] : NULL);
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break;
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case 3:
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((p3_func)p_s->f)(p_s->data,
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p_s->r[0] ? &tr[0] : NULL,
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p_s->r[1] ? &tr[1] : NULL,
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p_s->r[2] ? &tr[2] : NULL);
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break;
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case 4:
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((p4_func)p_s->f)(p_s->data,
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p_s->r[0] ? &tr[0] : NULL,
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p_s->r[1] ? &tr[1] : NULL,
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p_s->r[2] ? &tr[2] : NULL,
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p_s->r[3] ? &tr[3] : NULL);
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break;
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default:
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g_message("do_parallel_regions: Bad number of regions %d\n",
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p_s->n_regions);
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}
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IF_THREAD(pthread_mutex_lock(&p_s->mutex);)
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IF_THREAD(
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{
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for (i = 0; i < p_s->n_regions; i++)
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if (p_s->r[i])
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{
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if (tr[i].tiles)
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tile_release(tr[i].curtile, tr[i].dirty);
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}
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})
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if (p_s->progress_report_func)
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if (!p_s->progress_report_func(p_s->progress_report_data,
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p_s->r[0]->x, p_s->r[0]->y,
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p_s->r[0]->w, p_s->r[0]->h))
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cont = 0;
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} while (cont && p_s->PRI &&
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(p_s->PRI = (PixelRegionIterator*)pixel_regions_process(p_s->PRI)));
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p_s->nthreads--;
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/* fprintf(stderr, "processed %d tiles\n", ntiles); */
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IF_THREAD(pthread_mutex_unlock(&p_s->mutex);)
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return NULL;
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}
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#define MAX_THREADS 30
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static void
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pixel_regions_do_parallel(PixelProcessor *p_s)
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{
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IF_THREAD(int i;)
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IF_THREAD(int nthreads;)
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IF_THREAD(pthread_t threads[MAX_THREADS];)
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IF_THREAD(pthread_attr_t pthread_attr;)
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/* (p_s->PRI->region_width * p_s->PRI->region_height) /(64*64)); */
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IF_THREAD(
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nthreads = MIN(num_processors, MAX_THREADS);
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nthreads = MIN(nthreads, 1 +
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(p_s->PRI->region_width * p_s->PRI->region_height)
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/(TILE_WIDTH*TILE_HEIGHT));
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if (nthreads > 1)
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{
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pthread_attr_init (&pthread_attr);
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for (i = 0; i < nthreads; i++)
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{
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pthread_create (&threads[i], &pthread_attr,
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(void *(*)(void *)) do_parallel_regions,
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p_s);
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}
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for (i = 0; i < nthreads; i++)
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{
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pthread_join(threads[i], NULL);
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}
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}
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else
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)
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do_parallel_regions(p_s);
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if (p_s->nthreads != 0)
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fprintf(stderr, "Ack, we lost a thread\n");
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}
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static PixelProcessor *
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pixel_regions_real_process_parallel(p_func f, void *data,
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ProgressReportFunc report_func,
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void *report_data,
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int num_regions, va_list ap)
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{
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int i;
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PixelProcessor *p_s;
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p_s = g_new(PixelProcessor, 200);
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for (i = 0; i < num_regions; i++)
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p_s->r[i] = va_arg (ap, PixelRegion *);
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switch(num_regions)
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{
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case 1:
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p_s->PRI = (PixelRegionIterator *) pixel_regions_register(num_regions,
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p_s->r[0]);
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break;
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case 2:
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p_s->PRI = (PixelRegionIterator *) pixel_regions_register(num_regions,
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p_s->r[0],
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p_s->r[1]);
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break;
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case 3:
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p_s->PRI = (PixelRegionIterator *) pixel_regions_register(num_regions,
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p_s->r[0],
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p_s->r[1],
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p_s->r[2]);
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break;
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case 4:
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p_s->PRI = (PixelRegionIterator *) pixel_regions_register(num_regions,
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p_s->r[0],
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p_s->r[1],
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p_s->r[2],
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p_s->r[3]);
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break;
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default:
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g_message("pixel_regions_real_process_parallel: Bad number of regions %d\n",
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p_s->n_regions);
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}
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if (!p_s->PRI)
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{
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pixel_processor_free(p_s);
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return NULL;
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}
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IF_THREAD(p_s->PRI->dirty_tiles = 0;)
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p_s->f = f;
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p_s->data = data;
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p_s->n_regions = num_regions;
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IF_THREAD(pthread_mutex_init(&(p_s->mutex), NULL);)
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p_s->nthreads = 0;
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p_s->progress_report_data = report_data;
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p_s->progress_report_func = report_func;
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pixel_regions_do_parallel(p_s);
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if (p_s->PRI)
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return p_s;
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pixel_processor_free (p_s);
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return NULL;
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}
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void
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pixel_regions_process_parallel(p_func f, void *data, int num_regions, ...)
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{
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va_list va;
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va_start (va, num_regions);
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pixel_regions_real_process_parallel(f, data, NULL, NULL, num_regions, va);
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va_end (va);
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}
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PixelProcessor *
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pixel_regions_process_parallel_progress(p_func f, void *data,
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ProgressReportFunc progress_func,
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void *progress_data, int num_regions,
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...)
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{
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PixelProcessor *ret;
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va_list va;
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va_start (va, num_regions);
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ret = pixel_regions_real_process_parallel(f, data,
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progress_func, progress_data,
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num_regions, va);
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va_end (va);
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return ret;
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}
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void
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pixel_processor_stop(PixelProcessor *pp)
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{
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if (!pp)
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return;
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if (pp->PRI)
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{
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pixel_regions_process_stop (pp->PRI);
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pp->PRI = NULL;
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}
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pixel_processor_free(pp);
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}
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PixelProcessor *
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pixel_processor_cont(PixelProcessor *pp)
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{
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pixel_regions_do_parallel(pp);
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if (pp->PRI)
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return pp;
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pixel_processor_free (pp);
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return NULL;
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}
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void
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pixel_processor_free (PixelProcessor *pp)
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{
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if (pp->PRI)
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pixel_processor_stop(pp);
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else
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g_free(pp);
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}
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