nsxiv/thumbs.c

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/* sxiv: thumbs.c
* Copyright (c) 2011 Bert Muennich <muennich at informatik.hu-berlin.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
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#include <string.h>
#include <pthread.h>
#include <Imlib2.h>
#include "config.h"
#include "thumbs.h"
#include "util.h"
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typedef struct tload_s {
const char **filenames;
tns_t *tns;
win_t *win;
} tload_t;
const int thumb_dim = THUMB_SIZE + 10;
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pthread_t loader;
tload_t tinfo;
void* thread_load(void *arg) {
int i, w, h;
float z, zw, zh;
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tload_t *tl;
thumb_t *t;
Imlib_Image *im;
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tl = (tload_t*) arg;
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for (i = 0; i < tl->tns->cnt; ++i) {
if (!(im = imlib_load_image(tl->filenames[i])))
continue;
imlib_context_set_image(im);
w = imlib_image_get_width();
h = imlib_image_get_height();
zw = (float) THUMB_SIZE / (float) w;
zh = (float) THUMB_SIZE / (float) h;
z = MIN(zw, zh);
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t = &tl->tns->thumbs[i];
t->w = z * w;
t->h = z * h;
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t->pm = win_create_pixmap(tl->win, t->w, t->h);
imlib_context_set_drawable(t->pm);
imlib_render_image_part_on_drawable_at_size(0, 0, w, h,
0, 0, t->w, t->h);
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t->loaded = 1;
imlib_free_image();
}
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tl->tns->loaded = 1;
return 0;
}
void tns_load(tns_t *tns, win_t *win, const char **fnames, int fcnt) {
pthread_attr_t tattr;
if (!tns || !win || !fnames || !fcnt)
return;
tns->thumbs = (thumb_t*) s_malloc(fcnt * sizeof(thumb_t));
memset(tns->thumbs, 0, fcnt * sizeof(thumb_t));
tns->cnt = fcnt;
tns->loaded = 0;
tinfo.filenames = fnames;
tinfo.tns = tns;
tinfo.win = win;
pthread_attr_init(&tattr);
pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_JOINABLE);
if (pthread_create(&loader, &tattr, thread_load, (void*) &tinfo))
die("could not create thread");
}
void tns_free(tns_t *tns, win_t *win) {
int i;
if (!tns)
return;
for (i = 0; i < tns->cnt; ++i)
win_free_pixmap(win, tns->thumbs[i].pm);
free(tns->thumbs);
tns->thumbs = NULL;
}
void tns_render(tns_t *tns, win_t *win) {
int i, cnt, x, y;
if (!tns || !win)
return;
tns->cols = win->w / thumb_dim;
tns->rows = win->h / thumb_dim;
cnt = tns->cols * tns->rows;
if (tns->first && tns->first + cnt > tns->cnt)
tns->first = MAX(0, tns->cnt - cnt);
cnt = MIN(tns->first + cnt, tns->cnt);
win_clear(win);
x = y = 5;
i = tns->first;
while (i < cnt) {
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if (!tns->thumbs[i].loaded)
continue;
tns->thumbs[i].x = x + (THUMB_SIZE - tns->thumbs[i].w) / 2;
tns->thumbs[i].y = y + (THUMB_SIZE - tns->thumbs[i].h) / 2;
win_draw_pixmap(win, tns->thumbs[i].pm, tns->thumbs[i].x,
tns->thumbs[i].y, tns->thumbs[i].w, tns->thumbs[i].h);
if (++i % tns->cols == 0) {
x = 5;
y += thumb_dim;
} else {
x += thumb_dim;
}
}
win_draw(win);
}