imfloat.h

3D Game Engine Design Source Code非常棒

#ifndef IMFLOAT_H
#define IMFLOAT_H

#include "imagbase.h"
#include "imagfile.h"

class mgcImageFloat : public mgcImage
{
// object information
public:
	// image creation
	mgcImageFloat ();
	mgcImageFloat (int _dimensions, const int* initial);
	mgcImageFloat (int _dimensions, int initial_all);
	mgcImageFloat (int _dimensions, int initial0, int initial1, ...);
	mgcImageFloat (const mgcImage& image);
	mgcImageFloat (const mgcLattice& lattice);

	// image file access
	mgcImageFloat (char* fname);
	mgcImage& Load (char* fname, int trgt = -1);
	mgcImage& Save (char* fname, int trgt = -1);
	mgcImage& SaveAs (char* fname, int ff, int trgt = -1);

	// element access
	float* operator() () { return (float*)data; }
	float& operator[] (int i) const
		{ return *(float*)(data+size*i); }
	float& operator() (int x) const
		{ return *(float*)(data+size*x); }
	float& operator() (int x, int y) const
		{ return *(float*)(data+size*Index(x,y)); }
	float& operator() (int x, int y, int z) const
		{ return *(float*)(data+size*Index(x,y,z)); }
	float& operator() (int x, int y, int z, int w) const
		{ return *(float*)(data+size*Index(x,y,z,w)); }
	float& operator() (const mgcCoordinate& coordinate) const
		{ return *(float*)(data+size*Index(coordinate)); }

	// assignments and comparisons
    mgcImageFloat& operator= (const mgcImageFloat& image);
	mgcImageFloat& operator= (const mgcImage& image);
	mgcImageFloat& operator= (float value);
	int operator== (const mgcImage& image);
	int operator== (float value);
	int operator!= (const mgcImage& image)  { return !( *this == image ); }
	int operator!= (float value)  { return !( *this == value ); }

	// arithmetic updates
	static float zero_divide_result;
	mgcImageFloat& operator+= (const mgcImageFloat &image);
	mgcImageFloat& operator-= (const mgcImageFloat &image);
	mgcImageFloat& operator*= (const mgcImageFloat &image);
	mgcImageFloat& operator/= (const mgcImageFloat &image);
	mgcImageFloat& operator+= (float value);
	mgcImageFloat& operator-= (float value);
	mgcImageFloat& operator*= (float value);
	mgcImageFloat& operator/= (float value);

	// arithmetic operations
	mgcImageFloat operator- ();
	mgcImageFloat operator+ (const mgcImageFloat &image);
	mgcImageFloat operator- (const mgcImageFloat &image);
	mgcImageFloat operator* (const mgcImageFloat &image);
	mgcImageFloat operator/ (const mgcImageFloat &image);
	mgcImageFloat operator+ (float value);
	mgcImageFloat operator- (float value);
	mgcImageFloat operator* (float value);
	mgcImageFloat operator/ (float value);
	friend mgcImageFloat operator+ (float value, mgcImageFloat &image);
	friend mgcImageFloat operator- (float value, mgcImageFloat &image);
	friend mgcImageFloat operator* (float value, mgcImageFloat &image);
	friend mgcImageFloat operator/ (float value, mgcImageFloat &image);

	// pixel statistics
	float Min () const { return minimum; }
	float Max () const { return maximum; }
	void Min (float value)  { minimum = value; }
	void Max (float value)  { maximum = value; }
	void ComputeMaxMin ();

protected:
	float minimum, maximum;

// error handling
public:
	static int verbose;
	static unsigned error;
	static void Report (ostream& ostr);
private:
	static const unsigned zero_dimension;
	static const unsigned invalid_dimension;
	static const unsigned null_pixel_pointer;
	static const unsigned incompatible_images;
	static const unsigned get_data_failed;
	static const unsigned put_data_failed;
	static const unsigned load_failed;
	static const unsigned save_failed;
	static const char* message[8];
	static int Number (unsigned single_error);
	static void Report (unsigned single_error);
};

#endif