+struct blitter {
+ GdkPixmap *pixmap;
+ int w, h, x, y;
+};
+
+blitter *blitter_new(int w, int h)
+{
+ /*
+ * We can't create the pixmap right now, because fe->window
+ * might not yet exist. So we just cache w and h and create it
+ * during the firs call to blitter_save.
+ */
+ blitter *bl = snew(blitter);
+ bl->pixmap = NULL;
+ bl->w = w;
+ bl->h = h;
+ return bl;
+}
+
+void blitter_free(blitter *bl)
+{
+ if (bl->pixmap)
+ gdk_pixmap_unref(bl->pixmap);
+ sfree(bl);
+}
+
+void blitter_save(frontend *fe, blitter *bl, int x, int y)
+{
+ if (!bl->pixmap)
+ bl->pixmap = gdk_pixmap_new(fe->area->window, bl->w, bl->h, -1);
+ bl->x = x;
+ bl->y = y;
+ gdk_draw_pixmap(bl->pixmap,
+ fe->area->style->fg_gc[GTK_WIDGET_STATE(fe->area)],
+ fe->pixmap,
+ x, y, 0, 0, bl->w, bl->h);
+}
+
+void blitter_load(frontend *fe, blitter *bl, int x, int y)
+{
+ assert(bl->pixmap);
+ if (x == BLITTER_FROMSAVED && y == BLITTER_FROMSAVED) {
+ x = bl->x;
+ y = bl->y;
+ }
+ gdk_draw_pixmap(fe->pixmap,
+ fe->area->style->fg_gc[GTK_WIDGET_STATE(fe->area)],
+ bl->pixmap,
+ 0, 0, x, y, bl->w, bl->h);
+}
+