Use Cairo instead of gdk_draw_drawable and gdk_gc_set_exposures

1 files changed, 14 insertions, 5 deletions

diff --git a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Canvas.java b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Canvas.java
index f45d8438fd..f3392944bf 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Canvas.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Canvas.java
@@ -12,6 +12,7 @@ package org.eclipse.swt.widgets;
 
 
 import org.eclipse.swt.graphics.*;
+import org.eclipse.swt.internal.cairo.Cairo;
 import org.eclipse.swt.internal.gtk.*;
 import org.eclipse.swt.*;
 
@@ -275,11 +276,19 @@ public void scroll (int destX, int destY, int x, int y, int width, int height, b
 //		GC gc = new GC (this);
 //		gc.copyArea (x, y, width, height, destX, destY);
 //		gc.dispose ();
-		//TODO: Use Cairo
-		long /*int*/ gdkGC = OS.gdk_gc_new (window);
-		OS.gdk_gc_set_exposures (gdkGC, true);
-		OS.gdk_draw_drawable (window, gdkGC, window, copyRect.x, copyRect.y, copyRect.x + deltaX, copyRect.y + deltaY, copyRect.width, copyRect.height);
-		OS.g_object_unref (gdkGC);
+		if (OS.USE_CAIRO) {
+			OS.gdk_window_invalidate_rect (window, copyRect, true);
+			long /*int*/ cairo = OS.gdk_cairo_create (window);
+			OS.gdk_cairo_set_source_window (cairo, window, 0, 0);
+			Cairo.cairo_rectangle (cairo, copyRect.x + deltaX, copyRect.y + deltaY, copyRect.width, copyRect.height);
+			Cairo.cairo_fill (cairo);
+			Cairo.cairo_destroy (cairo);
+		} else {
+			long /*int*/ gdkGC = OS.gdk_gc_new (window);
+			OS.gdk_gc_set_exposures (gdkGC, true);
+			OS.gdk_draw_drawable (window, gdkGC, window, copyRect.x, copyRect.y, copyRect.x + deltaX, copyRect.y + deltaY, copyRect.width, copyRect.height);
+			OS.g_object_unref (gdkGC);
+		}
 		boolean disjoint = (destX + width < x) || (x + width < destX) || (destY + height < y) || (y + height < destY);
 		if (disjoint) {
 			GdkRectangle rect = new GdkRectangle ();