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(); }