BitmapTools.h

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#ifndef _BITMAP_TOOLS_H
#define _BITMAP_TOOLS_H

#include <GraphicsDefs.h>
#include <InterfaceDefs.h>
#include <Rect.h>
#include <Point.h>

class BBitmap;
class BRect;
class BPoint;

namespace BExperimental {

typedef rgb_color (*pixel_reader)(const uint8* pixel, const color_map* cmap);
typedef void (*pixel_writer)(uint8* pixel, const rgb_color color, const color_map* cmap);

class pixel_access
{
public:
    pixel_access();
    pixel_access(color_space space);
    ~pixel_access();
    
    status_t set_to(color_space space);
    
    bool valid() const;
    
    inline size_t bpp() const
    {
        return fBPP;
    }
    
    inline rgb_color read(const uint8* const pixel) const
    {
        return (*fReader)(pixel, fColorMap);
    }
    
    inline void write(uint8* const pixel, const rgb_color color)
    {
        (*fWriter)(pixel, color, fColorMap);
    }
    

private:
    // actually public variables due to inlines.
    const color_map *fColorMap;
    size_t fBPP;
    pixel_reader fReader;
    pixel_writer fWriter;
};
    
status_t mix_bitmaps(BBitmap* dest,
                     const BBitmap* src1, const BBitmap* src2, uint8 amount);

status_t scale_bitmap(BBitmap* dest, const BBitmap* src);

status_t blend_bitmap_color(BBitmap* dest, rgb_color color, uint8 amount=0);

// Deallocate returned array with free().
uint8* make_stencil(const BBitmap* src, rgb_color background, uint8 slop=0);

status_t copy_bitmap(BBitmap* dest,
                     const BBitmap* src, BRect srcRect, BPoint destPnt,
                     drawing_mode mode=B_OP_COPY, uint8* stencil=NULL);

status_t set_bitmap(BBitmap* dest, const BBitmap* src, bool dither=true);

}   // namespace BExperimental

using namespace BExperimental;

#endif

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Copyright 2005 by yellowTAB GmbH, Be Inc., Palm Source Inc. and their respective legal successors
All rights reserved.