Problem reading from bitmap
I'm making a prog that converts a bitmap to a kind of binary stencil.
The data that gets written is the image width, followed by a bool signaling if the first pixel is on or not. The data after that is written as a sequence of short values each saying how many pixels to draw or skip.
My problem is that only 3 bytes are being written to the file and the on-off states never seem to flip. I added some debug output and it displays the first pixel on my bmp to have a value of 2293488 when it is black and should be 0.
The problem should be in the highlighted area. Also to test it there needs to be a 24bit bitmap image in the same directory called "test.bmp".
Code:
#include <iostream>
#include <fstream>
using namespace::std;
bool Convert(const char*, const char*);
int main()
{
if(! Convert("test.bmp", "result.dat"))
cout << "Error";
else
cout << "Success";
cin.ignore();
}
// Converts 24bit bmp data to compressed format
bool Convert(const char* bmpFile, const char* outFile)
{
short w, h;
char bytes[3];
bool state;
int count =0;
//Set up streams
ifstream in;
ofstream out;
in.open(bmpFile, ios::binary);
if(! in.is_open()) return false;
out.open(outFile, ios::out);
//Write the image width
in.seekg(18, ios::beg);
in.read((char *)&w, sizeof w);
in.seekg(22, ios::beg);
out.write(bytes, 2);
in.read((char *)&h, sizeof h);
cout << "Width: " << w << endl;
cout << "Height: " << h << endl;
//Write if first pixel is on or not
in.seekg(54,ios::beg);
in.read(bytes, 3);
if(bytes)
state = true;
else
state = false;
out.write((char*)&state, 1);
cout << "Pix 1: " << ((int)bytes & 0x00FFFFFF) << endl;
cout << "State: " << state << endl;
in.seekg(54, ios::beg);
for(int y=h; y>0; y--)
{
for(int x=0; x<w; x++)
{
in.read((char*)&bytes, 3);
if(state)
{
if(bytes)
{
count++;
}
else
{
out.write((char*)&count, 2);
cout << "On: " << count << endl;
count = 1;
state = false;
}
}
else
{
if(!bytes)
{
count++;
}
else
{
out.write((char*)&count, 2);
cout << "Off: " << count << endl;
count = 1;
state = true;
}
}
}
}
cout << "Counter at: " << count << endl;
in.close();
out.close();
return true;
}/**/
Cheers.
