imuchar.cpp

3D Game Engine Design Source Code非常棒

#include <fstream.h>
#include <string.h>
#include "imuchar.h"

// error handling
int mgcImageUchar::verbose = 0;
unsigned mgcImageUchar::error = 0;
const unsigned mgcImageUchar::zero_dimension      = 0x00000001;
const unsigned mgcImageUchar::invalid_dimension   = 0x00000002;
const unsigned mgcImageUchar::null_pixel_pointer  = 0x00000004;
const unsigned mgcImageUchar::get_data_failed     = 0x00000008;
const unsigned mgcImageUchar::put_data_failed     = 0x00000010;
const unsigned mgcImageUchar::load_failed         = 0x00000020;
const unsigned mgcImageUchar::save_failed         = 0x00000040;
const char* mgcImageUchar::message[7] = {
	"zero dimension in argument list",
	"invalid dimension in variable argument list",
	"null pointer in assignment",
	"attempt to read file data failed",
	"attempt to write file data failed",
	"attempt to load file failed",
	"attempt to save file failed"
};

//===========================================================================
mgcImageUchar::
mgcImageUchar () :
	mgcImage(mgcUchar::type)
{
}
//---------------------------------------------------------------------------
mgcImageUchar::
mgcImageUchar (int _dimensions, const int* initial) :
	mgcImage(mgcUchar::type,_dimensions,initial)
{
}
//---------------------------------------------------------------------------
mgcImageUchar::mgcImageUchar (int _dimensions, int initial_all) :
	mgcImage(mgcUchar::type,_dimensions,initial_all)
{
}
//---------------------------------------------------------------------------
mgcImageUchar::
mgcImageUchar (int _dimensions, int initial0, int initial1, ...) :
	mgcImage(mgcUchar::type)
{
	if ( _dimensions < 2 ) {
		Report(invalid_dimension);
		return;
	}

	int* initial = new int[_dimensions];
	initial[0] = initial0;
	initial[1] = initial1;

	va_list ap;
	va_start(ap,initial1);
	for (int d = 2; d < _dimensions; d++)
		initial[d] = va_arg(ap,int);
	va_end(ap);

	*(mgcImage*)this = mgcImage(mgcUchar::type,_dimensions,initial);
	delete[] initial;
}
//---------------------------------------------------------------------------
mgcImageUchar::
mgcImageUchar (const mgcImage& image) :
	mgcImage(mgcUchar::type,image.Dimensions(),image.Bounds())
{
	*(mgcImage*)this = image;
}
//---------------------------------------------------------------------------
mgcImageUchar::
mgcImageUchar (const mgcLattice& lattice) :
	mgcImage(mgcUchar::type,lattice.Dimensions(),lattice.Bounds())
{
}
//---------------------------------------------------------------------------
mgcImageUchar::
mgcImageUchar (char* fname) :
	mgcImage(mgcUchar::type)
{
	Load(fname);
}
//---------------------------------------------------------------------------
mgcImage& mgcImageUchar::
Load (char* fname, int trgt)
{
	if ( trgt == -1 )
		trgt = mgcUchar::type;
	mgcImage::Load(fname,trgt);
	return *this;
}
//---------------------------------------------------------------------------
mgcImage& mgcImageUchar::
Save (char* fname, int trgt)
{
	if ( trgt == -1 )
		trgt = mgcUchar::type;
	mgcImage::Save(fname,trgt);
	return *this;
}
//---------------------------------------------------------------------------
mgcImage& mgcImageUchar::
SaveAs (char* fname, int ff, int trgt)
{
	if ( trgt == -1 )
		trgt = mgcUchar::type;
	mgcImage::SaveAs(fname,ff,trgt);
	return *this;
}
//---------------------------------------------------------------------------
mgcImageUchar& mgcImageUchar::
operator= (const mgcImageUchar& image)
{
	if ( *(mgcLattice*)this != *(mgcLattice*)&image ) {
		*(mgcImage*)this = image;
		return *this;
	}

	memcpy(data,image.data,size*quantity);
	return *this;
}
//---------------------------------------------------------------------------
mgcImageUchar& mgcImageUchar::
operator= (const mgcImage& image)
{
	*(mgcImage*)this = image;
	return *this;
}
//---------------------------------------------------------------------------
mgcImageUchar& mgcImageUchar::
operator= (unsigned char value)
{
	if ( data )
		for (int i = 0; i < quantity; i++)
			(*this)[i] = value;
	else
		Report(null_pixel_pointer);
	return *this;
}
//---------------------------------------------------------------------------
int mgcImageUchar::
operator== (const mgcImage& image)
{
	return *(mgcImage*)this == image;
}
//---------------------------------------------------------------------------
int mgcImageUchar::
operator== (unsigned char value)
{
	if ( data == 0 ) {
		Report(null_pixel_pointer);
		return 0;
	}

	for (int i = 0; i < quantity; i++)
		if ( (*this)[i] != value )
			return 0;
	return 1;
}
//---------------------------------------------------------------------------
void mgcImageUchar::
ComputeMaxMin ()
{
	minimum = maximum = (*this)[0];

	for (int i = 1; i < quantity; i++) {
		unsigned char value = (*this)[i];
		if ( value < minimum )
			minimum = value;
		else if ( value > maximum )
			maximum = value;
	}
}
//---------------------------------------------------------------------------
int mgcImageUchar::
Number (unsigned single_error)
{
	int result;
	for (result = -1; single_error; single_error >>= 1)
		result++;
	return result;
}
//---------------------------------------------------------------------------
void mgcImageUchar::
Report (unsigned single_error)
{
	if ( verbose || mgcImage::verbose || mgcLattice::verbose )
		cout << "mgcImageUchar: " << message[Number(single_error)] << endl;
	else
		ofstream("imuchar.err",ios::out|ios::app)
			 << "mgcImageUchar: " << message[Number(single_error)] << endl;

	error |= single_error;
}
//---------------------------------------------------------------------------
void mgcImageUchar::
Report (ostream& ostr)
{
	for (unsigned single_error = 1; single_error; single_error <<= 1)
		if ( error & single_error )
			ostr << "mgcImageUchar: " << message[Number(single_error)]
				 << endl;

	error = 0;
}
//===========================================================================