BmpLoader.cpp

#include "BmpLoader.h"
#include<stdio.h>
#include <iostream>

BmpLoader::BmpLoader(const char* filename)
{
    FILE *file=0;
    file=fopen(filename, "rb");
    if(!file)
        std::cout<<"File not found"<<std::endl;
    fread(&bfh, sizeof(BITMAPFILEHEADER),1,file);
    if(bfh.bfType != 0x4D42)
        std::cout<<"Not a valid bitmap"<<std::endl;
    fread(&bih, sizeof(BITMAPINFOHEADER),1,file);
    if(bih.biSizeImage==0)
        bih.biSizeImage=bih.biHeight*bih.biWidth*3;
    textureData = new unsigned char[bih.biSizeImage];
    fseek(file, bfh.bfOffBits, SEEK_SET);
    fread(textureData, 1, bih.biSizeImage, file);
    unsigned char temp;
    for(int i=0; i<bih.biSizeImage; i+=3)
    {
        temp = textureData[i];
        textureData[i] = textureData[i+2];
        textureData[i+2] = temp;

    }

    iWidth = bih.biWidth;
    iHeight = bih.biHeight;
    fclose(file);
}

BmpLoader::~BmpLoader()
{
    delete [] textureData;
}