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#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <math.h>
using namespace std;
#define BYTE unsigned char
#define WORD unsigned short
#define DWORD unsigned long
#define NULL 0
#define RGB(r,g,b) ( ((DWORD)(BYTE)r)|((DWORD)((BYTE)g)<<8)|((DWORD)((BYTE)b)<<16) )
#define GetRValue(RGBColor) (BYTE) (RGBColor)
#define GetGValue(RGBColor) (BYTE) (((DWORD)RGBColor) >> 8)
#define GetBValue(RGBColor) (BYTE) (((DWORD)RGBColor) >> 16)
#pragma pack(2)
struct BITMAPFILEHEADER
{
WORD bfType;
DWORD bfSize;
WORD bfReserved1;
WORD bfReserved2;
DWORD bfOffBits;
};
struct BITMAPINFOHEADER
{
DWORD biSize;
DWORD biWidth;
DWORD biHeight;
WORD biPlanes;
WORD biBitCount;
DWORD biCompression;
DWORD biSizeImage;
DWORD biXPelsPerMeter;
DWORD biYPelsPerMeter;
DWORD biClrUsed;
DWORD biClrImportant;
};
class CBitmap
{
DWORD* Colors;
DWORD Width;
DWORD Height;
public:
DWORD GetWidth(){return Width;};
DWORD GetHeight(){return Height;};
CBitmap()
{
Colors = NULL;
Width = Height = 0;
}
~CBitmap()
{
if(Colors)delete[] Colors;
}
DWORD& Access(int x, int y)
{
return Colors[x*Height+y];
}
bool Load(const char* FileName)
{
BITMAPFILEHEADER BitmapFileHeader;
BITMAPINFOHEADER BitmapInfoHeader;
ifstream infile(FileName, ios::binary);
infile.read((char*)&BitmapFileHeader, sizeof(BitmapFileHeader));
infile.read((char*)&BitmapInfoHeader, sizeof(BitmapInfoHeader));
if(BitmapFileHeader.bfType != 0x4d42
|| BitmapInfoHeader.biClrUsed!=0
|| BitmapInfoHeader.biBitCount!=24
|| BitmapInfoHeader.biCompression!=0
|| BitmapInfoHeader.biPlanes!=1)return false;
Width = BitmapInfoHeader.biWidth;
Height = BitmapInfoHeader.biHeight;
BYTE* ColorsData = new BYTE[3*Width*Height];
Colors = new DWORD[Width*Height];
infile.read((char*)ColorsData, 3*Width*Height);
DWORD Offset = 0;
for(int y=Height-1;y>=0;y--)
{
for(int x=0;x<(int)Width;x++, Offset+=3)
{
BYTE B = ColorsData[Offset + 0];
BYTE G = ColorsData[Offset + 1];
BYTE R = ColorsData[Offset + 2];
Access(x,y) = RGB(R,G,B);
}
}
delete[] ColorsData;
infile.close();
return true;
}
bool Save(const char* FileName)
{
if(Colors==NULL)return false;
BITMAPFILEHEADER BitmapFileHeader = {
0x4d42, //Bmp Mark
sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + 3 * Width * Height, //File Size
0, //Not Used
0, //Not Used
sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) //Colors Offset in File
};
BITMAPINFOHEADER BitmapInfoHeader = {
sizeof(BITMAPINFOHEADER), //Structure Size
Width,
Height,
1, //Number of Plans
24, //Bits Per colors
0, //Compression Ration
0, //Original Image Size (When Compressed)
2835, //Number of Pixel Per Meter (Vertical)
2835, //Number of Pixel Per Meter (Horizontal)
0, //Number of Used Colors (Indexed Mode)
0, //Number of Important Colors (Indexed Mode)
};
BYTE* ColorsData = new BYTE[3*Width*Height];
DWORD Offset = 0;
for(int y=Height-1;y>=0;y--)
{
for(int x=0;x<(int)Width;x++, Offset+=3)
{
DWORD Color = Access(x,y);
ColorsData[Offset + 0] = GetBValue(Color);
ColorsData[Offset + 1] = GetGValue(Color);
ColorsData[Offset + 2] = GetRValue(Color);
}
}
ofstream outfile(FileName, ios::binary);
outfile.write((char*)&BitmapFileHeader, sizeof(BitmapFileHeader));
outfile.write((char*)&BitmapInfoHeader, sizeof(BitmapInfoHeader));
outfile.write((char*)ColorsData, 3*Width*Height);
outfile.close();
delete[] ColorsData;
return false;
}
void RedScale ()
{
DWORD R;
for(int y=0;y<Height;y++)
{
for(int x=0;x<(int)Width;x++)
{
DWORD Color = Access(x,y);
R= GetRValue(Color) ;
Access(x,y) = RGB(R,0,0);
}
}
}
};
int _tmain(int argc, _TCHAR* argv[])
{
CBitmap Original, Result ,image;
Original.Load("Menna.bmp");
image.RedScale();
Result.Save("Menna.bmp");
return 0;
}
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