X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=draw.c;h=ea6e4be597db1deb8ab84a3252e40714b6129a72;hb=75855598371def570546c23ee8712f74f5c61643;hp=7307e6619586f9587e8bae8c2e9401e69e292fce;hpb=fd96ae416d3a636f178a64f289c645942fa2d391;p=xboard.git

diff --git a/draw.c b/draw.c
index 7307e66..ea6e4be 100644
--- a/draw.c
+++ b/draw.c
@@ -200,6 +200,17 @@ InitDrawingSizes (BoardSize boardSize, int flags)
   oldMono = appData.monoMode;
 }
 
+void
+ExposeRedraw (Option *graph, int x, int y, int w, int h)
+{   // copy a selected part of the buffer bitmap to the display
+    cairo_t *cr = cairo_create((cairo_surface_t *) graph->textValue);
+    cairo_set_source_surface(cr, (cairo_surface_t *) graph->choice, 0, 0);
+    cairo_set_antialias(cr, CAIRO_ANTIALIAS_NONE);
+    cairo_rectangle(cr, x, y, w, h);
+    cairo_fill(cr);
+    cairo_destroy(cr);
+}
+
 static void
 CreatePNGBoard (char *s, int kind)
 {