for transparent drawable

1 files changed, 62 insertions, 0 deletions

diff --git a/src/FbTk/Transparent.hh b/src/FbTk/Transparent.hh
new file mode 100644
index 0000000..8652568
--- /dev/null
+++ b/src/FbTk/Transparent.hh
@@ -0,0 +1,62 @@
+// Transparent.hh for FbTk - Fluxbox Toolkit
+// Copyright (c) 2003 Henrik Kinnunen (fluxgen(at)users.sourceforge.net)
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+// $Id: Transparent.hh,v 1.1 2003/04/20 13:27:16 fluxgen Exp $
+
+#ifndef FBTK_TRANSPARENT_HH
+#define FBTK_TRANSPARENT_HH
+
+#include <X11/Xlib.h>
+
+namespace FbTk {
+
+/// renders to drawable together with an alpha mask
+class Transparent {
+public:
+    Transparent(Drawable source, Drawable dest, unsigned char alpha, int screen_num);
+    ~Transparent();
+    /// sets alpha value
+    void setAlpha(unsigned char alpha);
+    /// sets source drawable
+    void setSource(Drawable src, int screen_num);
+    /// sets destination drawable
+    void setDest(Drawable dest, int screen_num);
+    /**
+       renders to dest from src with specified coordinates and size
+    */
+    void render(int src_x, int src_y,
+                int dest_x, int dest_y,
+                unsigned int width, unsigned int height) const;
+    unsigned char alpha() const { return m_alpha; }
+private:
+    void freeAlpha();
+    void allocAlpha(unsigned char newval);
+    unsigned long m_alpha_pic;
+    unsigned long m_src_pic;
+    unsigned long m_dest_pic;
+    Drawable m_source, m_dest;
+    unsigned char m_alpha;
+};
+
+}; // end namespace  FbTk
+
+#endif // FBTK_TRANSPARENT_HH
+