accessing data inside an AUX_RGBImageRec structure

OpenGL OpenGL: Advanced Coding
1

Hi guys,

I’ve got a bit of a weird error in my code, I’m loading a bitmap into an AUX_RGBImageRec structure and then trying to read the data out of the data array and into my own array so I can play around with it but I only seem to be accessing the first member of the array then it stops rather than running through the whole array (of size width x height x 3). Heres the code I think its something stupid but I can’t see it…

int SizeOfArray = 0;
unsigned char *DataArray;
int Counter = 0;
AUX_RGBImageRec *TextureImage;

// Load The Bitmap, Check For Errors, If Bitmap’s Not Found Quit
if ( TextureImage=LoadBMP(FileLocation) )
{
// calculate size of data array required
SizeOfArray = TextureImage->sizeXTextureImage->sizeY3;

	// alocate data array of required size
	DataArray = new unsigned char[SizeOfArray];

	// fill output array 
	for( Counter=0 ; Counter<SizeOfArray ; Counter++ );
	{
		DataArray[Counter] = TextureImage->data[Counter];
	}

}

cheers,

Convict@Large

2
  1. turn on “generate debug info”
  2. start your program in the debugger
  3. set a breakpoint right after the loadBMP() call
  4. press “step” repeatedly, keeping watch on
    the values of your local variables, until
    you figure out what’s going on.
3

I’ve found the error there was a ; after the for head. I surprised the compiler did not pick it up as bad syntax!

4

It is not bad syntax; it’s perfectly legal.
Many compilers have warnings for this case
though, if you turn them on. I guess I’ll
add advice 0) always turn on all compiler
warnings, and heed them even if they seem
stupid!