463 lines
9.6 KiB
C
463 lines
9.6 KiB
C
/* sxiv: thumbs.c
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* Copyright (c) 2011 Bert Muennich <muennich at informatik.hu-berlin.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#define _POSIX_C_SOURCE 200112L
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#define _THUMBS_CONFIG
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <utime.h>
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#include "thumbs.h"
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#include "util.h"
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#include "config.h"
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#ifdef EXIF_SUPPORT
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void exif_auto_orientate(const fileinfo_t*);
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#endif
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const int thumb_dim = THUMB_SIZE + 10;
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char *cache_dir = NULL;
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bool tns_cache_enabled() {
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struct stat stats;
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return cache_dir && !stat(cache_dir, &stats) && S_ISDIR(stats.st_mode) &&
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!access(cache_dir, W_OK);
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}
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char* tns_cache_filepath(const char *filepath) {
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size_t len;
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char *cfile = NULL;
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if (!cache_dir || !filepath || *filepath != '/')
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return NULL;
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if (strncmp(filepath, cache_dir, strlen(cache_dir))) {
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len = strlen(cache_dir) + strlen(filepath) + 6;
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cfile = (char*) s_malloc(len);
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snprintf(cfile, len, "%s/%s.png", cache_dir, filepath + 1);
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}
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return cfile;
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}
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Imlib_Image* tns_cache_load(const char *filepath) {
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char *cfile;
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struct stat cstats, fstats;
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Imlib_Image *im = NULL;
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if (!filepath)
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return NULL;
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if (stat(filepath, &fstats))
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return NULL;
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if ((cfile = tns_cache_filepath(filepath))) {
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if (!stat(cfile, &cstats) && cstats.st_mtime == fstats.st_mtime)
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im = imlib_load_image(cfile);
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free(cfile);
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}
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return im;
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}
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void tns_cache_write(thumb_t *t, bool force) {
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char *cfile, *dirend;
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struct stat cstats, fstats;
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struct utimbuf times;
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Imlib_Load_Error err = 0;
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if (!t || !t->im || !t->file || !t->file->name || !t->file->path)
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return;
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if (stat(t->file->path, &fstats))
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return;
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if ((cfile = tns_cache_filepath(t->file->path))) {
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if (force || stat(cfile, &cstats) || cstats.st_mtime != fstats.st_mtime) {
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if ((dirend = strrchr(cfile, '/'))) {
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*dirend = '\0';
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err = r_mkdir(cfile);
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*dirend = '/';
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}
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if (!err) {
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imlib_context_set_image(t->im);
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imlib_image_set_format("png");
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imlib_save_image_with_error_return(cfile, &err);
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}
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if (err) {
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warn("could not cache thumbnail: %s", t->file->name);
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} else {
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times.actime = fstats.st_atime;
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times.modtime = fstats.st_mtime;
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utime(cfile, ×);
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}
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}
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free(cfile);
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}
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}
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void tns_clean_cache(tns_t *tns) {
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int dirlen;
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bool delete;
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char *cfile, *filename, *tpos;
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r_dir_t dir;
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if (!cache_dir)
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return;
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if (r_opendir(&dir, cache_dir)) {
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warn("could not open thumbnail cache directory: %s", cache_dir);
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return;
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}
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dirlen = strlen(cache_dir);
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while ((cfile = r_readdir(&dir))) {
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filename = cfile + dirlen;
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delete = false;
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if ((tpos = strrchr(filename, '.'))) {
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*tpos = '\0';
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if (access(filename, F_OK))
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delete = true;
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*tpos = '.';
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}
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if (delete && unlink(cfile))
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warn("could not delete cache file: %s", cfile);
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free(cfile);
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}
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r_closedir(&dir);
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}
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void tns_init(tns_t *tns, int cnt) {
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int len;
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char *homedir;
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if (!tns)
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return;
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if (cnt) {
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tns->thumbs = (thumb_t*) s_malloc(cnt * sizeof(thumb_t));
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memset(tns->thumbs, 0, cnt * sizeof(thumb_t));
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} else {
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tns->thumbs = NULL;
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}
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tns->cnt = tns->first = tns->sel = 0;
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tns->cap = cnt;
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tns->alpha = true;
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tns->dirty = false;
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if ((homedir = getenv("HOME"))) {
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if (cache_dir)
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free(cache_dir);
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len = strlen(homedir) + 10;
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cache_dir = (char*) s_malloc(len * sizeof(char));
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snprintf(cache_dir, len, "%s/.sxiv", homedir);
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} else {
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warn("could not locate thumbnail cache directory");
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}
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}
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void tns_free(tns_t *tns) {
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int i;
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if (!tns)
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return;
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if (tns->thumbs) {
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for (i = 0; i < tns->cnt; i++) {
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if (tns->thumbs[i].im) {
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imlib_context_set_image(tns->thumbs[i].im);
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imlib_free_image();
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}
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}
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free(tns->thumbs);
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tns->thumbs = NULL;
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}
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if (cache_dir) {
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free(cache_dir);
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cache_dir = NULL;
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}
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}
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bool tns_load(tns_t *tns, int n, const fileinfo_t *file,
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bool force, bool silent)
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{
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int w, h;
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bool use_cache, cache_hit = false;
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float z, zw, zh;
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thumb_t *t;
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Imlib_Image *im;
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const char *fmt;
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if (!tns || !tns->thumbs || !file || !file->name || !file->path)
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return false;
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if (n < 0 || n >= tns->cap)
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return false;
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t = &tns->thumbs[n];
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t->file = file;
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if (t->im) {
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imlib_context_set_image(t->im);
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imlib_free_image();
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}
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if ((use_cache = tns_cache_enabled())) {
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if (!force && (im = tns_cache_load(file->path)))
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cache_hit = true;
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}
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if (!cache_hit &&
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(access(file->path, R_OK) || !(im = imlib_load_image(file->path))))
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{
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if (!silent)
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warn("could not open image: %s", file->name);
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return false;
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}
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imlib_context_set_image(im);
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imlib_context_set_anti_alias(1);
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fmt = imlib_image_format();
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/* avoid unused-but-set-variable warning */
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(void) fmt;
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#ifdef EXIF_SUPPORT
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if (!cache_hit && !strcmp(fmt, "jpeg"))
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exif_auto_orientate(file);
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#endif
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w = imlib_image_get_width();
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h = imlib_image_get_height();
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zw = (float) THUMB_SIZE / (float) w;
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zh = (float) THUMB_SIZE / (float) h;
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z = MIN(zw, zh);
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t->w = z * w;
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t->h = z * h;
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if (!(t->im = imlib_create_cropped_scaled_image(0, 0, w, h, t->w, t->h)))
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die("could not allocate memory");
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imlib_free_image_and_decache();
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if (use_cache && !cache_hit)
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tns_cache_write(t, false);
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tns->dirty = true;
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return true;
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}
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void tns_check_view(tns_t *tns, bool scrolled) {
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int r;
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if (!tns)
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return;
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tns->first -= tns->first % tns->cols;
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r = tns->sel % tns->cols;
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if (scrolled) {
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/* move selection into visible area */
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if (tns->sel >= tns->first + tns->cols * tns->rows)
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tns->sel = tns->first + r + tns->cols * (tns->rows - 1);
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else if (tns->sel < tns->first)
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tns->sel = tns->first + r;
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} else {
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/* scroll to selection */
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if (tns->first + tns->cols * tns->rows <= tns->sel) {
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tns->first = tns->sel - r - tns->cols * (tns->rows - 1);
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tns->dirty = true;
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} else if (tns->first > tns->sel) {
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tns->first = tns->sel - r;
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tns->dirty = true;
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}
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}
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}
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void tns_render(tns_t *tns, win_t *win) {
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int i, cnt, r, x, y;
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thumb_t *t;
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if (!tns || !tns->thumbs || !win)
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return;
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if (!tns->dirty)
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return;
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win_clear(win);
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imlib_context_set_drawable(win->pm);
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tns->cols = MAX(1, win->w / thumb_dim);
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tns->rows = MAX(1, win->h / thumb_dim);
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if (tns->cnt < tns->cols * tns->rows) {
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tns->first = 0;
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cnt = tns->cnt;
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} else {
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tns_check_view(tns, false);
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cnt = tns->cols * tns->rows;
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if ((r = tns->first + cnt - tns->cnt) >= tns->cols)
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tns->first -= r - r % tns->cols;
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if (r > 0)
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cnt -= r % tns->cols;
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}
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r = cnt % tns->cols ? 1 : 0;
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tns->x = x = (win->w - MIN(cnt, tns->cols) * thumb_dim) / 2 + 5;
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tns->y = y = (win->h - (cnt / tns->cols + r) * thumb_dim) / 2 + 5;
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for (i = 0; i < cnt; i++) {
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t = &tns->thumbs[tns->first + i];
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t->x = x + (THUMB_SIZE - t->w) / 2;
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t->y = y + (THUMB_SIZE - t->h) / 2;
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imlib_context_set_image(t->im);
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if (imlib_image_has_alpha() && !tns->alpha)
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win_draw_rect(win, win->pm, t->x, t->y, t->w, t->h, true, 0, win->white);
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imlib_render_image_part_on_drawable_at_size(0, 0, t->w, t->h,
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t->x, t->y, t->w, t->h);
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if ((i + 1) % tns->cols == 0) {
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x = tns->x;
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y += thumb_dim;
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} else {
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x += thumb_dim;
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}
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}
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tns->dirty = false;
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tns_highlight(tns, win, tns->sel, true);
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}
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void tns_highlight(tns_t *tns, win_t *win, int n, bool hl) {
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thumb_t *t;
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int x, y;
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unsigned long col;
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if (!tns || !tns->thumbs || !win)
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return;
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if (n >= 0 && n < tns->cnt) {
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t = &tns->thumbs[n];
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if (hl)
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col = win->selcol;
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else if (win->fullscreen)
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col = win->black;
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else
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col = win->bgcol;
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x = t->x - (THUMB_SIZE - t->w) / 2;
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y = t->y - (THUMB_SIZE - t->h) / 2;
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win_draw_rect(win, win->pm, x - 3, y - 3, THUMB_SIZE + 6, THUMB_SIZE + 6,
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false, 2, col);
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}
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win_draw(win);
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}
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bool tns_move_selection(tns_t *tns, win_t *win, direction_t dir) {
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int old;
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if (!tns || !tns->thumbs || !win)
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return false;
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old = tns->sel;
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switch (dir) {
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case DIR_LEFT:
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if (tns->sel > 0)
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tns->sel--;
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break;
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case DIR_RIGHT:
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if (tns->sel < tns->cnt - 1)
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tns->sel++;
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break;
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case DIR_UP:
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if (tns->sel >= tns->cols)
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tns->sel -= tns->cols;
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break;
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case DIR_DOWN:
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if (tns->sel + tns->cols < tns->cnt)
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tns->sel += tns->cols;
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break;
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}
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if (tns->sel != old) {
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tns_highlight(tns, win, old, false);
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tns_check_view(tns, false);
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if (!tns->dirty)
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tns_highlight(tns, win, tns->sel, true);
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}
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return tns->sel != old;
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}
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bool tns_scroll(tns_t *tns, direction_t dir) {
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int old;
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if (!tns)
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return false;
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old = tns->first;
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if (dir == DIR_DOWN && tns->first + tns->cols * tns->rows < tns->cnt) {
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tns->first += tns->cols;
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tns_check_view(tns, true);
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tns->dirty = true;
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} else if (dir == DIR_UP && tns->first >= tns->cols) {
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tns->first -= tns->cols;
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tns_check_view(tns, true);
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tns->dirty = true;
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}
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return tns->first != old;
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}
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int tns_translate(tns_t *tns, int x, int y) {
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int n;
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if (!tns || !tns->thumbs)
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return -1;
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if (x < tns->x || y < tns->y)
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return -1;
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n = tns->first + (y - tns->y) / thumb_dim * tns->cols +
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(x - tns->x) / thumb_dim;
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if (n >= tns->cnt)
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n = -1;
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return n;
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}
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