408 lines
8.7 KiB
C
408 lines
8.7 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
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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 <stdlib.h>
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#include <string.h>
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#include <sys/time.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 "config.h"
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#include "thumbs.h"
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#include "util.h"
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extern Imlib_Image *im_invalid;
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const int thumb_dim = THUMB_SIZE + 10;
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int tns_cache_enabled();
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Imlib_Image* tns_cache_load(const char*);
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void tns_cache_write(thumb_t*, Bool);
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void tns_init(tns_t *tns, int cnt) {
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if (!tns)
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return;
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tns->cnt = tns->first = tns->sel = 0;
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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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tns->cap = cnt;
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tns->dirty = 0;
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}
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void tns_free(tns_t *tns, win_t *win) {
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int i;
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if (!tns || !tns->thumbs)
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return;
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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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void tns_load(tns_t *tns, win_t *win, int n, const char *filename) {
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int w, h;
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int use_cache, cached = 0;
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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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if (!tns || !win || !filename)
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return;
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if (n >= tns->cap)
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return;
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else if (n >= tns->cnt)
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tns->cnt = n + 1;
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t = &tns->thumbs[n];
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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 ((im = tns_cache_load(filename)))
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cached = 1;
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}
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if (cached || (im = imlib_load_image(filename)))
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imlib_context_set_image(im);
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else
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imlib_context_set_image(im_invalid);
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w = imlib_image_get_width();
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h = imlib_image_get_height();
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if (im) {
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t->filename = filename;
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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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} else {
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t->filename = NULL;
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z = 1.0;
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}
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t->w = z * w;
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t->h = z * h;
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imlib_context_set_anti_alias(1);
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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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if (im)
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imlib_free_image_and_decache();
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if (use_cache && !cached)
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tns_cache_write(t, False);
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tns->dirty = 1;
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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 = 1;
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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 = 1;
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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->dirty || !win)
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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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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 = 0;
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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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unsigned long col;
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if (!tns || !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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win_draw_rect(win, win->pm, t->x - 2, t->y - 2, t->w + 4, t->h + 4,
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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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int tns_move_selection(tns_t *tns, win_t *win, tnsdir_t dir) {
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int old;
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if (!tns || !win)
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return 0;
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old = tns->sel;
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switch (dir) {
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case TNS_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 TNS_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 TNS_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 TNS_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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int tns_scroll(tns_t *tns, tnsdir_t dir) {
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int old;
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if (!tns)
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return 0;
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old = tns->first;
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if (dir == TNS_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 = 1;
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} else if (dir == TNS_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 = 1;
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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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thumb_t *t;
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if (!tns || 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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t = &tns->thumbs[n];
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if (x >= t->x && x <= t->x + t->w && y >= t->y && y <= t->y + t->h)
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return n;
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}
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return -1;
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}
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/* thumbnail caching */
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int tns_cache_enabled() {
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int len, ret = 0;
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char *cpath, *homedir;
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struct stat stats;
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if ((homedir = getenv("HOME"))) {
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len = strlen(homedir) + 10;
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cpath = (char*) s_malloc(len * sizeof(char));
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snprintf(cpath, len, "%s/.sxiv", homedir);
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ret = !stat(cpath, &stats) && S_ISDIR(stats.st_mode) &&
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!access(cpath, W_OK);
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free(cpath);
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}
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return ret;
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}
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char* tns_cache_filename(const char *filename) {
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size_t len;
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int i;
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char *cfile, *abspath, *homedir;
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if (!filename)
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return NULL;
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if (!(homedir = getenv("HOME")))
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return NULL;
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if (*filename != '/') {
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if (!(abspath = absolute_path(filename)))
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return NULL;
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} else {
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abspath = (char*) s_malloc(strlen(filename) + 1);
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strcpy(abspath, filename);
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}
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len = strlen(abspath);
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for (i = 0; i < len; ++i) {
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if (abspath[i] == '/')
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abspath[i] = '%';
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}
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len += strlen(homedir) + 15;
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cfile = (char*) s_malloc(len);
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snprintf(cfile, len, "%s/.sxiv/%s.png", homedir, abspath + 1);
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free(abspath);
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return cfile;
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}
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Imlib_Image* tns_cache_load(const char *filename) {
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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 (!filename || stat(filename, &fstats))
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return NULL;
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if ((cfile = tns_cache_filename(filename))) {
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if (!stat(cfile, &cstats) &&
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cstats.st_mtim.tv_sec == fstats.st_mtim.tv_sec &&
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cstats.st_mtim.tv_nsec == fstats.st_mtim.tv_nsec)
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{
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printf("cache hit: %s\n", filename);
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im = imlib_load_image(cfile);
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} else
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printf("cache MISS: %s\n", filename);
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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;
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struct stat cstats, fstats;
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struct timeval times[2];
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Imlib_Load_Error err;
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if (!t || !t->im || !t->filename)
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return;
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if (stat(t->filename, &fstats))
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return;
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if ((cfile = tns_cache_filename(t->filename))) {
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if (force || stat(cfile, &cstats) ||
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cstats.st_mtim.tv_sec != fstats.st_mtim.tv_sec ||
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cstats.st_mtim.tv_nsec != fstats.st_mtim.tv_nsec)
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{
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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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if (err) {
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warn("could not cache thumbnail: %s", t->filename);
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} else {
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TIMESPEC_TO_TIMEVAL(×[0], &fstats.st_atim);
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TIMESPEC_TO_TIMEVAL(×[1], &fstats.st_mtim);
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utimes(cfile, times);
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printf("thumbnail cache file written: %s\n", t->filename);
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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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