128 lines
2.8 KiB
C
128 lines
2.8 KiB
C
/* sxiv: image.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>
|
|
#include <stdio.h>
|
|
|
|
#include <Imlib2.h>
|
|
|
|
#include "sxiv.h"
|
|
#include "image.h"
|
|
|
|
void imlib_init(win_t *win) {
|
|
if (!win)
|
|
return;
|
|
|
|
imlib_context_set_display(win->env.dpy);
|
|
imlib_context_set_visual(win->env.vis);
|
|
imlib_context_set_colormap(win->env.cmap);
|
|
}
|
|
|
|
void imlib_destroy() {
|
|
if (imlib_context_get_image())
|
|
imlib_free_image();
|
|
}
|
|
|
|
int img_load(img_t *img, const char *filename) {
|
|
Imlib_Image *im;
|
|
|
|
if (!img || !filename)
|
|
return -1;
|
|
|
|
if (imlib_context_get_image())
|
|
imlib_free_image();
|
|
|
|
if (!(im = imlib_load_image(filename))) {
|
|
WARN("could not open image: %s", filename);
|
|
return -1;
|
|
}
|
|
|
|
imlib_context_set_image(im);
|
|
|
|
img->w = imlib_image_get_width();
|
|
img->h = imlib_image_get_height();
|
|
|
|
return 0;
|
|
}
|
|
|
|
void img_display(img_t *img, win_t *win) {
|
|
float zw, zh;
|
|
|
|
if (!img || !win || !imlib_context_get_image())
|
|
return;
|
|
|
|
/* set zoom level to fit image into window */
|
|
if (img->scalemode != SCALE_ZOOM) {
|
|
zw = (float) win->w / (float) img->w;
|
|
zh = (float) win->h / (float) img->h;
|
|
img->zoom = MIN(zw, zh);
|
|
|
|
if (img->zoom * 100.0 < ZOOM_MIN)
|
|
img->zoom = ZOOM_MIN / 100.0;
|
|
else if (img->zoom * 100.0 > ZOOM_MAX)
|
|
img->zoom = ZOOM_MAX / 100.0;
|
|
|
|
if (img->scalemode == SCALE_DOWN && img->zoom > 1.0)
|
|
img->zoom = 1.0;
|
|
}
|
|
|
|
/* center image in window */
|
|
img->x = (win->w - img->w * img->zoom) / 2;
|
|
img->y = (win->h - img->h * img->zoom) / 2;
|
|
|
|
img_render(img, win);
|
|
}
|
|
|
|
void img_render(img_t *img, win_t *win) {
|
|
int sx, sy, sw, sh;
|
|
int dx, dy, dw, dh;
|
|
|
|
if (!img || !win || !imlib_context_get_image())
|
|
return;
|
|
|
|
if (img->x < 0) {
|
|
sx = -img->x / img->zoom;
|
|
sw = win->w / img->zoom;
|
|
dx = 0;
|
|
dw = win->w;
|
|
} else {
|
|
sx = 0;
|
|
sw = img->w;
|
|
dx = img->x;
|
|
dw = img->w * img->zoom;
|
|
}
|
|
if (img->y < 0) {
|
|
sy = -img->y / img->zoom;
|
|
sh = win->h / img->zoom;
|
|
dy = 0;
|
|
dh = win->h;
|
|
} else {
|
|
sy = 0;
|
|
sh = img->h;
|
|
dy = img->y;
|
|
dh = img->h * img->zoom;
|
|
}
|
|
|
|
win_clear(win);
|
|
|
|
imlib_context_set_drawable(win->pm);
|
|
imlib_render_image_part_on_drawable_at_size(sx, sy, sw, sh, dx, dy, dw, dh);
|
|
|
|
win_draw(win);
|
|
}
|