New function clg_gdk_pixbuf_swap_rgb

[clg] / gdk / alien / glue.c

diff --git a/gdk/alien/glue.c b/gdk/alien/glue.c
index b2bcc10..cbe14ee 100644 (file)
--- a/gdk/alien/glue.c
+++ b/gdk/alien/glue.c
@@ -1,5 +1,5 @@
 /* Common Lisp bindings for GTK+ v2.x
- * Copyright 1999-2005 Espen S. Johnsen <espen@users.sf.net>
+ * Copyright 1999-2007 Espen S. Johnsen <espen@users.sf.net>
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -21,19 +21,76 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-/* $Id: glue.c,v 1.3 2005-04-23 16:48:50 espen Exp $ */
+/* $Id: glue.c,v 1.9 2008-11-06 17:27:39 espen Exp $ */
 
 
 #include <gdk/gdk.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#ifdef GDK_WINDOWING_X11
 #include <gdk/gdkx.h>
+#elif defined (G_OS_WIN32)
+#include <gdk/gdkwin32.h>
+#endif
 
-struct _GdkDisplayX11
+gint clg_gdk_connection_number (GdkDisplay *display)
 {
-  GdkDisplay parent_instance;
-  Display *xdisplay;
-};
+#ifdef GDK_WINDOWING_X11
+  return ConnectionNumber (GDK_DISPLAY_XDISPLAY (display));
+#else
+  return -1;
+#endif
+}
 
-gint clg_gdk_connection_number (GdkDisplay *display)
+
+GdkWindow *clg_gdk_cairo_surface_get_window (cairo_surface_t *surface)
 {
-  return ConnectionNumber (((struct _GdkDisplayX11 *)display)->xdisplay);
+  /* If 'surface_info_key' had been public we would have had a
+     portable way to find the GdkWindow of a Cairo surface. */
+  
+#ifdef GDK_WINDOWING_X11
+  g_return_if_fail (cairo_surface_get_type (surface) == CAIRO_SURFACE_TYPE_XLIB);
+  
+  Display* display = cairo_xlib_surface_get_display (surface);
+  if (display) {
+    Drawable window = cairo_xlib_surface_get_drawable (surface);
+    if (window)
+      return gdk_window_lookup_for_display (window, display);
+  }
+
+  return NULL;
+#elif defined (G_OS_WIN32)
+  HDC hdc = (HDC)cairo_win32_surface_get_dc (surface);
+  if (hdc)
+    return gdk_window_lookup ((GdkNativeWindow)hdc);
+  else
+    return NULL;
+#else
+  return NULL;
+#endif
 }
+
+void clg_gdk_pixbuf_swap_rgb (GdkPixbuf *pixbuf)
+{
+
+  int n_channels = gdk_pixbuf_get_n_channels (pixbuf);
+  guchar *p, *pixels = gdk_pixbuf_get_pixels (pixbuf);
+  int width = gdk_pixbuf_get_width (pixbuf);
+  int height = gdk_pixbuf_get_height (pixbuf);
+  int rowstride = gdk_pixbuf_get_rowstride (pixbuf);
+  int x, y;
+
+  g_assert (gdk_pixbuf_get_bits_per_sample (pixbuf) == 8);
+  g_assert (gdk_pixbuf_get_has_alpha (pixbuf));
+  g_assert (n_channels == 4);
+
+  for (y = 0; y < height; y++) {
+    for (x = 0; x < width; x++) {
+      p = pixels + y * rowstride + x * n_channels;
+      guint tmp = p[0];
+      p[0] = p[2];
+      p[2] = tmp;
+    }
+  }
+}
+