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/*
/--------------------------------------------------------------------
|
| $Id: plpixelformat.h,v 1.6 2004/10/02 22:23:12 uzadow Exp $
|
| Copyright (c) 1996-2002 Ulrich von Zadow
|
\--------------------------------------------------------------------
*/
#ifndef INCL_PLPIXELFORMAT
#define INCL_PLPIXELFORMAT
#include "pldebug.h"
#include <string>
#include <list>
class PLPixelFormat {
public:
static const PLPixelFormat DONTCARE;
// Pixel format descriptions are MSB first on all machines.
static const PLPixelFormat L1;
static const PLPixelFormat I8;
static const PLPixelFormat L8;
static const PLPixelFormat L16;
static const PLPixelFormat X1R5G5B5;
static const PLPixelFormat A1R5G5B5;
static const PLPixelFormat R5G6B5;
static const PLPixelFormat R8G8B8;
static const PLPixelFormat A8R8G8B8;
static const PLPixelFormat X8R8G8B8;
static const PLPixelFormat R16G16B16;
static const PLPixelFormat B5G5R5X1;
static const PLPixelFormat B5G5R5A1;
static const PLPixelFormat B5G6R5;
static const PLPixelFormat B8G8R8;
static const PLPixelFormat B8G8R8A8;
static const PLPixelFormat B8G8R8X8;
static const PLPixelFormat A8B8G8R8;
static const PLPixelFormat X8B8G8R8;
static const PLPixelFormat B16G16R16;
static const PLPixelFormat L8Cbr8; // aka YUV 4:2:2
static const PLPixelFormat L8Cb8Cr8; // aka YUV 4:4:4
PLPixelFormat();
PLPixelFormat(const PLPixelFormat & that);
PLPixelFormat& operator=(const PLPixelFormat & that);
bool operator==(const PLPixelFormat & that) const;
bool operator!=(const PLPixelFormat & that) const;
enum Channel {R=0,G,B,A,I,L,Cbr,Cb,Cr,C,M,Y,K,X, COUNT};
typedef unsigned long long Mask;
Mask GetMask(Channel ch) const;
unsigned GetBitsPerPixel() const;
bool HasAlpha() const;
const PLPixelFormat & UseAlpha(bool useAlpha) const;
bool IsGrayscale() const;
const std::string& GetName() const;
static const PLPixelFormat & FromName(const std::string & name);
// find a PixelFormat matching the given channel order where each channel has a width of
// bpp / number of channels.
static const PLPixelFormat & FromChannels(const std::string & channels, int bpp);
int GetNumColors() const;
PLPixelFormat GetRGBSwapped() const;
struct UnsupportedPixelFormat {
UnsupportedPixelFormat(const std::string& what) : m_what(what) {};
const std::string m_what;
};
private:
PLPixelFormat(const std::string& sName);
static Channel parseChannel(const std::string& s, unsigned& pos);
std::string m_sName;
int m_BitsPerPixel;
Mask m_Channelmasks[COUNT];
typedef std::list<PLPixelFormat *> PixelFormatList;
static PixelFormatList s_pixelFormatList;
};
inline bool PLPixelFormat :: HasAlpha() const {
return GetMask(A) != 0;
}
inline bool PLPixelFormat :: IsGrayscale() const {
return GetMask(L) == (((Mask)1 << m_BitsPerPixel) - 1);
}
inline unsigned PLPixelFormat :: GetBitsPerPixel() const {
return m_BitsPerPixel;
}
inline const std::string& PLPixelFormat :: GetName() const {
return m_sName;
}
inline PLPixelFormat :: Mask PLPixelFormat :: GetMask(PLPixelFormat :: Channel ch) const {
PLASSERT(ch!=COUNT);
return m_Channelmasks[ch];
}
#endif
|
