void img_render(img_t *img) {
win_t *win;
int sx, sy, sw, sh;
int dx, dy, dw, dh;
if (img == NULL || img->im == NULL || img->win == NULL)
return;
win = img->win;
img_fit(img);
if (!img->re) {
/* rendered for the first time */
img->re = true;
if (img->zoom * img->w <= win->w)
img->x = (win->w - img->w * img->zoom) / 2;
else
img->x = 0;
if (img->zoom * img->h <= win->h)
img->y = (win->h - img->h * img->zoom) / 2;
else
img->y = 0;
}
if (img->checkpan) {
img_check_pan(img, false);
img->checkpan = false;
}
if (!img->dirty)
return;
/* calculate source and destination offsets */
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_image(img->im);
if (!img->alpha && imlib_image_has_alpha())
win_draw_rect(win, win->pm, dx, dy, dw, dh, True, 0, win->white);
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);
img->dirty = false;
}
int
gib_imlib_image_has_alpha(Imlib_Image im)
{
imlib_context_set_image(im);
return imlib_image_has_alpha();
}
