// File:	ReadSavePng.h
// Purpose:	Header file for ReadSavePng.fp/lib
//			Saves bitmap, panel or control in a PNG file
//			Reads a PNG file to a bitmap or a picture control
// For help, see the help of the FP

#ifndef _READ_SAVE_PNG
#define _READ_SAVE_PNG

#ifndef TRUE
	typedef int BOOL;
	#define TRUE 1
	#define FALSE 0
#endif

#ifndef Z_NO_COMPRESSION
	#define Z_NO_COMPRESSION         0
	#define Z_BEST_SPEED             1
	#define Z_BEST_COMPRESSION       9
	#define Z_DEFAULT_COMPRESSION  (-1)
#endif

extern void Png_SetParameters(const double Gamma, const BOOL Interlaced, 
					const double Dpi, const int CompressionLevel, 
					const int Alpha32);
					
extern void Png_SetTextTitle(char* Str, BOOL Comp);
extern void Png_SetTextAuthor(char* Str, BOOL Comp);
extern void Png_SetTextDescription(char* Str, BOOL Comp);
extern void Png_SetTextCopyright(char* Str, BOOL Comp);
extern void Png_SetTextCreationTime(char* Str, BOOL Comp);
extern void Png_SetTextSoftware(char* Str, BOOL Comp);
extern void Png_SetTextDisclaimer(char* Str, BOOL Comp);
extern void Png_SetTextWarning(char* Str, BOOL Comp);
extern void Png_SetTextSource(char* Str, BOOL Comp);
extern void Png_SetTextComment(char* Str, BOOL Comp);

extern BOOL Png_SaveBitmapToFile(unsigned char *Bits,
					int RowBytes, int PixDepth, 
					const int Width, const int Height,
					const char* FileName);
					
#ifdef _CVI_
extern BOOL Png_SavePanelControlToFile(int Panel, int Control, const char* FileName);
#endif

///////////////////////////////////////////////////////////////////////////////
extern void Png_GetParameters(double *Gamma, BOOL *Interlaced, 
					double *Dpi, int *CompressionLevel, 
					int *Alpha32);

extern BOOL Png_ReadBitmapFromFile(int *Bitmap, unsigned char **Bits,
					int *RowBytes, int *PixDepth, 
					int *Width, int *Height,
					const char* FileName);

extern BOOL Png_GetProperties(int *RowBytes, int *PixDepth, int *NbChan,
					int *Width, int *Height,
					const char* FileName);

#ifdef _CVI_
extern BOOL Png_ReadControlFromFile(int Panel, int Control, int ImageID, const char* FileName);
#endif

const char* Png_GetTextTitle(void);
const char* Png_GetTextAuthor(void);
const char* Png_GetTextDescription(void);
const char* Png_GetTextCopyright(void);
const char* Png_GetTextCreationTime(void);
const char* Png_GetTextSoftware(void);
const char* Png_GetTextDisclaimer(void);
const char* Png_GetTextWarning(void);
const char* Png_GetTextSource(void);
const char* Png_GetTextComment(void);

///////////////////////////////////////////////////////////////////////////////
extern void Png_CopyRGBtoGray(unsigned char *Dest, unsigned char *Source, 
						  const int NbPixels, const int Ratio);
extern void Png_CopyRGBtoBW(unsigned char *Dest, unsigned char *Source, 
						const int Ratio, const int Width, const int Height,
						const int ColorThreshold);

#ifndef _CVI_
	// for big endian machines, must be called before saving the file
	extern void Png_SwapEndian(unsigned long *Colors, const int Nb);
#endif

#endif // _READ_SAVE_PNG