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-rw-r--r--utils/nsxiv/thumbs.c591
1 files changed, 591 insertions, 0 deletions
diff --git a/utils/nsxiv/thumbs.c b/utils/nsxiv/thumbs.c
new file mode 100644
index 0000000..52820d4
--- /dev/null
+++ b/utils/nsxiv/thumbs.c
@@ -0,0 +1,591 @@
+/* Copyright 2011-2020 Bert Muennich
+ * Copyright 2021-2022 nsxiv contributors
+ *
+ * This file is a part of nsxiv.
+ *
+ * nsxiv 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.
+ *
+ * nsxiv 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 nsxiv. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "nsxiv.h"
+#define _THUMBS_CONFIG
+#include "config.h"
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <utime.h>
+
+#if HAVE_LIBEXIF
+#include <libexif/exif-data.h>
+#endif
+
+static char *cache_dir;
+
+static char* tns_cache_filepath(const char *filepath)
+{
+ size_t len;
+ char *cfile = NULL;
+
+ if (*filepath != '/')
+ return NULL;
+
+ if (strncmp(filepath, cache_dir, strlen(cache_dir)) != 0) {
+ /* don't cache images inside the cache directory! */
+ len = strlen(cache_dir) + strlen(filepath) + 2;
+ cfile = emalloc(len);
+ snprintf(cfile, len, "%s/%s", cache_dir, filepath + 1);
+ }
+ return cfile;
+}
+
+static Imlib_Image tns_cache_load(const char *filepath, bool *outdated)
+{
+ char *cfile;
+ struct stat cstats, fstats;
+ Imlib_Image im = NULL;
+
+ if (stat(filepath, &fstats) < 0)
+ return NULL;
+
+ if ((cfile = tns_cache_filepath(filepath)) != NULL) {
+ if (stat(cfile, &cstats) == 0) {
+ if (cstats.st_mtime == fstats.st_mtime)
+ im = imlib_load_image(cfile);
+ else
+ *outdated = true;
+ }
+ free(cfile);
+ }
+ return im;
+}
+
+static void tns_cache_write(Imlib_Image im, const char *filepath, bool force)
+{
+ char *cfile, *dirend;
+ struct stat cstats, fstats;
+ struct utimbuf times;
+ Imlib_Load_Error err;
+
+ if (options->private_mode)
+ return;
+
+ if (stat(filepath, &fstats) < 0)
+ return;
+
+ if ((cfile = tns_cache_filepath(filepath)) != NULL) {
+ if (force || stat(cfile, &cstats) < 0 ||
+ cstats.st_mtime != fstats.st_mtime)
+ {
+ if ((dirend = strrchr(cfile, '/')) != NULL) {
+ *dirend = '\0';
+ if (r_mkdir(cfile) == -1) {
+ error(0, errno, "%s", cfile);
+ goto end;
+ }
+ *dirend = '/';
+ }
+ imlib_context_set_image(im);
+ if (imlib_image_has_alpha()) {
+ imlib_image_set_format("png");
+ } else {
+ imlib_image_set_format("jpg");
+ imlib_image_attach_data_value("quality", NULL, 90, NULL);
+ }
+ imlib_save_image_with_error_return(cfile, &err);
+ if (err)
+ goto end;
+ times.actime = fstats.st_atime;
+ times.modtime = fstats.st_mtime;
+ utime(cfile, &times);
+ }
+end:
+ free(cfile);
+ }
+}
+
+void tns_clean_cache(void)
+{
+ int dirlen;
+ char *cfile, *filename;
+ r_dir_t dir;
+
+ if (r_opendir(&dir, cache_dir, true) < 0) {
+ error(0, errno, "%s", cache_dir);
+ return;
+ }
+
+ dirlen = strlen(cache_dir);
+
+ while ((cfile = r_readdir(&dir, false)) != NULL) {
+ filename = cfile + dirlen;
+ if (access(filename, F_OK) < 0) {
+ if (unlink(cfile) < 0)
+ error(0, errno, "%s", cfile);
+ }
+ free(cfile);
+ }
+ r_closedir(&dir);
+}
+
+void tns_init(tns_t *tns, fileinfo_t *tns_files, const int *cnt, int *sel, win_t *win)
+{
+ int len;
+ const char *homedir, *dsuffix = "";
+
+ if (cnt != NULL && *cnt > 0)
+ tns->thumbs = ecalloc(*cnt, sizeof(thumb_t));
+ else
+ tns->thumbs = NULL;
+ tns->files = tns_files;
+ tns->cnt = cnt;
+ tns->initnext = tns->loadnext = 0;
+ tns->first = tns->end = tns->r_first = tns->r_end = 0;
+ tns->sel = sel;
+ tns->win = win;
+ tns->dirty = false;
+
+ tns->zl = THUMB_SIZE;
+ tns_zoom(tns, 0);
+
+ if ((homedir = getenv("XDG_CACHE_HOME")) == NULL || homedir[0] == '\0') {
+ homedir = getenv("HOME");
+ dsuffix = "/.cache";
+ }
+ if (homedir != NULL) {
+ const char *s = "/nsxiv";
+ free(cache_dir);
+ len = strlen(homedir) + strlen(dsuffix) + strlen(s) + 1;
+ cache_dir = emalloc(len);
+ snprintf(cache_dir, len, "%s%s%s", homedir, dsuffix, s);
+ } else {
+ error(0, 0, "Cache directory not found");
+ }
+}
+
+CLEANUP void tns_free(tns_t *tns)
+{
+ int i;
+
+ if (tns->thumbs != NULL) {
+ for (i = 0; i < *tns->cnt; i++) {
+ if (tns->thumbs[i].im != NULL) {
+ imlib_context_set_image(tns->thumbs[i].im);
+ imlib_free_image();
+ }
+ }
+ free(tns->thumbs);
+ tns->thumbs = NULL;
+ }
+
+ free(cache_dir);
+ cache_dir = NULL;
+}
+
+static Imlib_Image tns_scale_down(Imlib_Image im, int dim)
+{
+ int w, h;
+ float z, zw, zh;
+
+ imlib_context_set_image(im);
+ w = imlib_image_get_width();
+ h = imlib_image_get_height();
+ zw = (float) dim / (float) w;
+ zh = (float) dim / (float) h;
+ z = MIN(zw, zh);
+ z = MIN(z, 1.0);
+
+ if (z < 1.0) {
+ imlib_context_set_anti_alias(1);
+ im = imlib_create_cropped_scaled_image(0, 0, w, h,
+ MAX(z * w, 1), MAX(z * h, 1));
+ if (im == NULL)
+ error(EXIT_FAILURE, ENOMEM, NULL);
+ imlib_free_image_and_decache();
+ }
+ return im;
+}
+
+bool tns_load(tns_t *tns, int n, bool force, bool cache_only)
+{
+ int maxwh = thumb_sizes[ARRLEN(thumb_sizes)-1];
+ bool cache_hit = false;
+ char *cfile;
+ thumb_t *t;
+ fileinfo_t *file;
+ Imlib_Image im = NULL;
+
+ if (n < 0 || n >= *tns->cnt)
+ return false;
+ file = &tns->files[n];
+ if (file->name == NULL || file->path == NULL)
+ return false;
+
+ t = &tns->thumbs[n];
+
+ if (t->im != NULL) {
+ imlib_context_set_image(t->im);
+ imlib_free_image();
+ t->im = NULL;
+ }
+
+ if (!force) {
+ if ((im = tns_cache_load(file->path, &force)) != NULL) {
+ imlib_context_set_image(im);
+ if (imlib_image_get_width() < maxwh &&
+ imlib_image_get_height() < maxwh)
+ {
+ if ((cfile = tns_cache_filepath(file->path)) != NULL) {
+ unlink(cfile);
+ free(cfile);
+ }
+ imlib_free_image_and_decache();
+ im = NULL;
+ } else {
+ cache_hit = true;
+ }
+#if HAVE_LIBEXIF
+ } else if (!force && !options->private_mode) {
+ int pw = 0, ph = 0, w, h, x = 0, y = 0;
+ bool err;
+ float zw, zh;
+ ExifData *ed;
+ ExifEntry *entry;
+ ExifContent *ifd;
+ ExifByteOrder byte_order;
+ int tmpfd;
+ char tmppath[] = "/tmp/nsxiv-XXXXXX";
+ Imlib_Image tmpim;
+
+ if ((ed = exif_data_new_from_file(file->path)) != NULL) {
+ if (ed->data != NULL && ed->size > 0 &&
+ (tmpfd = mkstemp(tmppath)) >= 0)
+ {
+ err = write(tmpfd, ed->data, ed->size) != ed->size;
+ close(tmpfd);
+
+ if (!err && (tmpim = imlib_load_image(tmppath)) != NULL) {
+ byte_order = exif_data_get_byte_order(ed);
+ ifd = ed->ifd[EXIF_IFD_EXIF];
+ entry = exif_content_get_entry(ifd, EXIF_TAG_PIXEL_X_DIMENSION);
+ if (entry != NULL)
+ pw = exif_get_long(entry->data, byte_order);
+ entry = exif_content_get_entry(ifd, EXIF_TAG_PIXEL_Y_DIMENSION);
+ if (entry != NULL)
+ ph = exif_get_long(entry->data, byte_order);
+
+ imlib_context_set_image(tmpim);
+ w = imlib_image_get_width();
+ h = imlib_image_get_height();
+
+ if (pw > w && ph > h && (pw - ph >= 0) == (w - h >= 0)) {
+ zw = (float) pw / (float) w;
+ zh = (float) ph / (float) h;
+ if (zw < zh) {
+ pw /= zh;
+ x = (w - pw) / 2;
+ w = pw;
+ } else if (zw > zh) {
+ ph /= zw;
+ y = (h - ph) / 2;
+ h = ph;
+ }
+ }
+ if (w >= maxwh || h >= maxwh) {
+ if ((im = imlib_create_cropped_image(x, y, w, h)) == NULL)
+ error(0, 0, "%s: error generating thumbnail", file->name);
+ }
+ imlib_free_image_and_decache();
+ }
+ unlink(tmppath);
+ }
+ exif_data_unref(ed);
+ }
+#endif /* HAVE_LIBEXIF */
+ }
+ }
+
+ if (im == NULL) {
+ if ((im = img_open(file)) == NULL)
+ return false;
+ }
+ imlib_context_set_image(im);
+
+ if (!cache_hit) {
+#if HAVE_LIBEXIF
+ exif_auto_orientate(file);
+#endif
+ im = tns_scale_down(im, maxwh);
+ imlib_context_set_image(im);
+ if (imlib_image_get_width() == maxwh || imlib_image_get_height() == maxwh)
+ tns_cache_write(im, file->path, true);
+ }
+
+ if (cache_only) {
+ imlib_free_image_and_decache();
+ } else {
+ t->im = tns_scale_down(im, thumb_sizes[tns->zl]);
+ imlib_context_set_image(t->im);
+ t->w = imlib_image_get_width();
+ t->h = imlib_image_get_height();
+ tns->dirty = true;
+ }
+ file->flags |= FF_TN_INIT;
+
+ if (n == tns->initnext)
+ while (++tns->initnext < *tns->cnt && ((++file)->flags & FF_TN_INIT));
+ if (n == tns->loadnext && !cache_only)
+ while (++tns->loadnext < tns->end && (++t)->im != NULL);
+
+ return true;
+}
+
+void tns_unload(tns_t *tns, int n)
+{
+ thumb_t *t;
+
+ if (n < 0 || n >= *tns->cnt)
+ return;
+
+ t = &tns->thumbs[n];
+
+ if (t->im != NULL) {
+ imlib_context_set_image(t->im);
+ imlib_free_image();
+ t->im = NULL;
+ }
+}
+
+static void tns_check_view(tns_t *tns, bool scrolled)
+{
+ int r;
+
+ if (tns == NULL)
+ return;
+
+ tns->first -= tns->first % tns->cols;
+ r = *tns->sel % tns->cols;
+
+ if (scrolled) {
+ /* move selection into visible area */
+ if (*tns->sel >= tns->first + tns->cols * tns->rows)
+ *tns->sel = tns->first + r + tns->cols * (tns->rows - 1);
+ else if (*tns->sel < tns->first)
+ *tns->sel = tns->first + r;
+ } else {
+ /* scroll to selection */
+ if (tns->first + tns->cols * tns->rows <= *tns->sel) {
+ tns->first = *tns->sel - r - tns->cols * (tns->rows - 1);
+ tns->dirty = true;
+ } else if (tns->first > *tns->sel) {
+ tns->first = *tns->sel - r;
+ tns->dirty = true;
+ }
+ }
+}
+
+void tns_render(tns_t *tns)
+{
+ thumb_t *t;
+ win_t *win;
+ int i, cnt, r, x, y;
+
+ if (!tns->dirty)
+ return;
+
+ win = tns->win;
+ win_clear(win);
+ imlib_context_set_drawable(win->buf.pm);
+
+ tns->cols = MAX(1, win->w / tns->dim);
+ tns->rows = MAX(1, win->h / tns->dim);
+
+ if (*tns->cnt < tns->cols * tns->rows) {
+ tns->first = 0;
+ cnt = *tns->cnt;
+ } else {
+ tns_check_view(tns, false);
+ cnt = tns->cols * tns->rows;
+ if ((r = tns->first + cnt - *tns->cnt) >= tns->cols)
+ tns->first -= r - r % tns->cols;
+ if (r > 0)
+ cnt -= r % tns->cols;
+ }
+ r = cnt % tns->cols ? 1 : 0;
+ tns->x = x = (win->w - MIN(cnt, tns->cols) * tns->dim) / 2 + tns->bw + 3;
+ tns->y = y = (win->h - (cnt / tns->cols + r) * tns->dim) / 2 + tns->bw + 3 +
+ (win->bar.top ? win->bar.h : 0);
+ tns->loadnext = *tns->cnt;
+ tns->end = tns->first + cnt;
+
+ for (i = tns->r_first; i < tns->r_end; i++) {
+ if ((i < tns->first || i >= tns->end) && tns->thumbs[i].im != NULL)
+ tns_unload(tns, i);
+ }
+ tns->r_first = tns->first;
+ tns->r_end = tns->end;
+
+ for (i = tns->first; i < tns->end; i++) {
+ t = &tns->thumbs[i];
+ if (t->im != NULL) {
+ t->x = x + (thumb_sizes[tns->zl] - t->w) / 2;
+ t->y = y + (thumb_sizes[tns->zl] - t->h) / 2;
+ imlib_context_set_image(t->im);
+ imlib_render_image_on_drawable_at_size(t->x, t->y, t->w, t->h);
+ if (tns->files[i].flags & FF_MARK)
+ tns_mark(tns, i, true);
+ } else {
+ tns->loadnext = MIN(tns->loadnext, i);
+ }
+ if ((i + 1) % tns->cols == 0) {
+ x = tns->x;
+ y += tns->dim;
+ } else {
+ x += tns->dim;
+ }
+ }
+ tns->dirty = false;
+ tns_highlight(tns, *tns->sel, true);
+}
+
+void tns_mark(tns_t *tns, int n, bool mark)
+{
+ if (n >= 0 && n < *tns->cnt && tns->thumbs[n].im != NULL) {
+ win_t *win = tns->win;
+ thumb_t *t = &tns->thumbs[n];
+ unsigned long col = win->win_bg.pixel;
+ int x = t->x + t->w, y = t->y + t->h;
+
+ win_draw_rect(win, x - 1, y + 1, 1, tns->bw, true, 1, col);
+ win_draw_rect(win, x + 1, y - 1, tns->bw, 1, true, 1, col);
+
+ if (mark)
+ col = win->mrk_fg.pixel;
+
+ win_draw_rect(win, x, y, tns->bw + 2, tns->bw + 2, true, 1, col);
+
+ if (!mark && n == *tns->sel)
+ tns_highlight(tns, n, true);
+ }
+}
+
+void tns_highlight(tns_t *tns, int n, bool hl)
+{
+ if (n >= 0 && n < *tns->cnt && tns->thumbs[n].im != NULL) {
+ win_t *win = tns->win;
+ thumb_t *t = &tns->thumbs[n];
+ unsigned long col = hl ? win->win_fg.pixel : win->win_bg.pixel;
+ int oxy = (tns->bw + 1) / 2 + 1, owh = tns->bw + 2;
+
+ win_draw_rect(win, t->x - oxy, t->y - oxy, t->w + owh, t->h + owh,
+ false, tns->bw, col);
+
+ if (tns->files[n].flags & FF_MARK)
+ tns_mark(tns, n, true);
+ }
+}
+
+bool tns_move_selection(tns_t *tns, direction_t dir, int cnt)
+{
+ int old, max;
+
+ old = *tns->sel;
+ cnt = cnt > 1 ? cnt : 1;
+
+ switch (dir) {
+ case DIR_UP:
+ *tns->sel = MAX(*tns->sel - cnt * tns->cols, *tns->sel % tns->cols);
+ break;
+ case DIR_DOWN:
+ max = tns->cols * ((*tns->cnt - 1) / tns->cols) +
+ MIN((*tns->cnt - 1) % tns->cols, *tns->sel % tns->cols);
+ *tns->sel = MIN(*tns->sel + cnt * tns->cols, max);
+ break;
+ case DIR_LEFT:
+ *tns->sel = MAX(*tns->sel - cnt, 0);
+ break;
+ case DIR_RIGHT:
+ *tns->sel = MIN(*tns->sel + cnt, *tns->cnt - 1);
+ break;
+ }
+
+ if (*tns->sel != old) {
+ tns_highlight(tns, old, false);
+ tns_check_view(tns, false);
+ if (!tns->dirty)
+ tns_highlight(tns, *tns->sel, true);
+ }
+ return *tns->sel != old;
+}
+
+bool tns_scroll(tns_t *tns, direction_t dir, bool screen)
+{
+ int d, max, old;
+
+ old = tns->first;
+ d = tns->cols * (screen ? tns->rows : 1);
+
+ if (dir == DIR_DOWN) {
+ max = *tns->cnt - tns->cols * tns->rows;
+ if (*tns->cnt % tns->cols != 0)
+ max += tns->cols - *tns->cnt % tns->cols;
+ tns->first = MIN(tns->first + d, max);
+ } else if (dir == DIR_UP) {
+ tns->first = MAX(tns->first - d, 0);
+ }
+
+ if (tns->first != old) {
+ tns_check_view(tns, true);
+ tns->dirty = true;
+ }
+ return tns->first != old;
+}
+
+bool tns_zoom(tns_t *tns, int d)
+{
+ int i, oldzl;
+
+ oldzl = tns->zl;
+ tns->zl += -(d < 0) + (d > 0);
+ tns->zl = MAX(tns->zl, 0);
+ tns->zl = MIN(tns->zl, ARRLEN(thumb_sizes)-1);
+
+ tns->bw = ((thumb_sizes[tns->zl] - 1) >> 5) + 1;
+ tns->bw = MIN(tns->bw, 4);
+ tns->dim = thumb_sizes[tns->zl] + 2 * tns->bw + 6;
+
+ if (tns->zl != oldzl) {
+ for (i = 0; i < *tns->cnt; i++)
+ tns_unload(tns, i);
+ tns->dirty = true;
+ }
+ return tns->zl != oldzl;
+}
+
+int tns_translate(tns_t *tns, int x, int y)
+{
+ int n;
+
+ if (x < tns->x || y < tns->y)
+ return -1;
+
+ n = tns->first + (y - tns->y) / tns->dim * tns->cols +
+ (x - tns->x) / tns->dim;
+ if (n >= *tns->cnt)
+ n = -1;
+
+ return n;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2026-01-02 19:24:23 +0000