some bugfixes and rescale filter

[melted] / src / modules / gtk2 / pixops.h

diff --git a/src/modules/gtk2/pixops.h b/src/modules/gtk2/pixops.h
new file mode 100644 (file)
index 0000000..37d6f37
--- /dev/null
+++ b/src/modules/gtk2/pixops.h
@@ -0,0 +1,69 @@
+/* GdkPixbuf library - Scaling and compositing functions
+ *
+ * Copyright (C) 1999 The Free Software Foundation
+ *
+ * Author: Owen Taylor <otaylor@redhat.com>
+ * Modified for YUV422 by: Dan Dennedy <dan@dennedy.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef PIXOPS_H
+#define PIXOPS_H
+
+#include <glib.h>
+
+/* Interpolation modes; must match GdkInterpType */
+typedef enum {
+       PIXOPS_INTERP_NEAREST,
+       PIXOPS_INTERP_TILES,
+       PIXOPS_INTERP_BILINEAR,
+       PIXOPS_INTERP_HYPER
+} PixopsInterpType;
+
+/* Scale src_buf from src_width / src_height by factors scale_x, scale_y
+ * and composite the portion corresponding to
+ * render_x, render_y, render_width, render_height in the new
+ * coordinate system into dest_buf starting at 0, 0
+ */
+void yuv422_scale     (guchar         *dest_buf,
+                      int             render_x0,
+                      int             render_y0,
+                      int             render_x1,
+                      int             render_y1,
+                      int             dest_rowstride,
+                      int             dest_channels,
+                      int             dest_has_alpha,
+                      const guchar   *src_buf,
+                      int             src_width,
+                      int             src_height,
+                      int             src_rowstride,
+                      int             src_channels,
+                      int             src_has_alpha,
+                      double          scale_x,
+                      double          scale_y,
+                      PixopsInterpType   interp_type);
+
+#define yuv422_scale_simple( dest_buf, dest_width, dest_height, dest_rowstride, src_buf, src_width, src_height, src_rowstride, interp_type ) \
+       yuv422_scale( (dest_buf), 0, 0, \
+               (dest_width)/2, (dest_height), \
+               (dest_rowstride), 4, 0, \
+               (src_buf), (src_width)/2, (src_height), \
+               (src_rowstride), 4, 0, \
+               (double) (dest_width) / (src_width), (double) (dest_height) / (src_height), \
+               (PixopsInterpType) interp_type );
+
+#endif