src/Blender.h

/*
 *   O         ,-
 *  ° o    . -´  '     ,-
 *   °  .´        ` . ´,´
 *     ( °   ))     . (
 *      `-;_    . -´ `.`.
 *          `._'       ´
 *
 * Copyright (c) 2007-2010 Markus Fisch <mf@markusfisch.de>
 *
 * Licensed under the MIT license:
 * http://www.opensource.org/licenses/mit-license.php
 */
#ifndef _PieDock_Blender_
#define _PieDock_Blender_

#include "Surface.h"
#include "ArgbSurface.h"

namespace PieDock
{
    class Blender
    {
        public:
            enum Opacity
            {
                Transparent = 0,
                Translucent = 128,
                Opaque = 0xff
            };

            Blender( Surface & );
            virtual ~Blender() {}
#ifdef HAVE_XRENDER
            virtual void setCompositing( bool c ) { compositing = c; }
            virtual const bool &useCompositing() const { return compositing; }
#endif
            virtual void blend( const ArgbSurface &, int, int, int = Opaque );

        protected:
            typedef struct
            {
                unsigned char *dest;
                unsigned char *src;
                int length;
                int repeats;
                int srcSkip;
                int destSkip;
                int alpha;
            } Details;

            virtual void blendInto32Bit( Details & );
            virtual void blendInto24Bit( Details & );
            virtual void blendInto16Bit( Details & );

        private:
            Surface *canvas;
#ifdef HAVE_XRENDER
            bool compositing;
#endif
    };
}

#endif