faithtools/faith/image.h

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#ifndef KDE__IMAGE_H
#define KDE__IMAGE_H

#include <faith/size.h>
#include <faith/rect.h>

namespace Faith
{

typedef unsigned int Rgb;



inline int qRed(Faith::Rgb rgb)
{
        return (rgb >> 16) & 0xff;
}

inline int qGreen(Faith::Rgb rgb)
{
        return (rgb >> 8) & 0xff;
}

inline int qBlue(Faith::Rgb rgb)
{
        return rgb & 0xff;
}

inline int qAlpha(Faith::Rgb rgb)
{
        return (rgb >> 24) & 0xff;
}

inline Faith::Rgb qRgb(int red, int green, int blue, int alpha=0xff)
{
        return (blue & 0xff)
                | ((green & 0xff) << 8)
                | ((red & 0xff) << 16)
                | ((alpha & 0xff) << 24);
}


inline int qGray(int red, int green, int blue)
{
        return ((red & 0xff)*11 + (green & 0xff)*16 + (blue & 0xff)*5) / 32;
}

inline int qGray(Faith::Rgb rgb)
{
        return qGray(qRed(rgb), qGreen(rgb), qBlue(rgb));
}


class FAITH_TOOLS_EXPORT Image
{
        struct KDEImageShared;
        mutable KDEImageShared *d;

public:
        enum Endian
        {
                IgnoreEndian,
                BigEndian,
                LittleEndian
        };

        Image();
        ~Image();
        Image(const Size &sz, int depth, int numColor = 0, Endian bitOrder = IgnoreEndian);
        Image(int w, int h, int depth, int numColor = 0, Endian bitOrder = IgnoreEndian);
        Image(const Image &copy);
        Image(unsigned char *data, int w, int h, int depth, int pitch, Endian bitOrder);

        Image(const char *filename);

        void create(int w, int h, int depth, int numColor = 0, Endian bitOrder = IgnoreEndian);

        Image &operator =(const Image &copy);

        bool operator ==(const Image &other) const;
        bool operator !=(const Image &other) const { return !operator==(other); }

        void detach();

        bool hasAlpha() const;
        void setAlpha(bool enabled);

        bool isNull() const;

        Faith::Image createAlphaMask() const;

        int width() const;
        int height() const;

        int pitch() const;
        int bytesPerLine() const { return pitch(); }

        int numBytes() const;

        int depth() const;

        Size size() const;
        Rect rect() const;

        unsigned char *scanLine(int i);
        const unsigned char *scanLine(int i) const;
        unsigned char *bits() { return scanLine(0); }
        const unsigned char *bits() const { return scanLine(0); }

        const unsigned char * const *jumpTable() const;

        
        unsigned int pixelIndex(int x, int y) const;
        
        Rgb pixel(int x, int y) const;

        void setPixel(int x, int y, unsigned int pixel);

        void reset();

        Rgb color(int i) const;

        void setColor(int i, Rgb color);

        void save(const char *filename) const;
};


typedef bool (*tryLoadImage)(Image &image, const char *filename);

}

#endif

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