TGA Problems

        
/* forced failure */
if (!(*_pfnAllocHook)(_HOOK_FREE, pUserData, 0, nBlockUse, 0L, NULL, 0))
{
    _RPT0(_CRT_WARN, "Client hook free failure.\n");

    return;
}
  

     
//  Gets the tga image data if it is compressed

int GLImage::tgaGetCompressedData()
{
	//  Allocate memory for the image data

	tgaImageData = (unsigned char*)malloc(tgaImageSize);

	//  Check to make sure the allocation of memory was a success

	if(tgaImageData == NULL)
		return 0;

	int	currentPixel	= 0;	//  Current pixel that is being read from data

	int currentByte		= 0;	//  Current byte we are writing into image data


	//  Storage space for one pixel

	unsigned char *	colorBuffer = (unsigned char *)malloc(tgaImageBytes);

	//  Begin the uncompression loop

	do
	{
		int chunkHeader = 0;	//  Variables to store the value of te ID chunk


		//  Attemp to read the chunk's header

		if(fread(&chunkHeader, sizeof(int), 1, file) == NULL)
		{
			if(tgaImageData != NULL)
				free(tgaImageData);
			if(colorBuffer != NULL)
				free(colorBuffer);
			return 0;
		}
		
		if(chunkHeader < 128)	//  If the chunk is a 'RAW' chunk

		{
			chunkHeader++;	//  Add on to the value to get the total number of RAW pixels

			
			//  Start RAW pixel reading loop

			for(short i = 0; i < chunkHeader; i++)
			{
				//  Try to read one pixel and if it fails return false

				if(fread(colorBuffer, 1, tgaImageBytes, file) != (size_t)tgaImageBytes)
				{
					if(tgaImageData != NULL)
						free(tgaImageData);

					if(colorBuffer != NULL)
						free (colorBuffer);
					return 0;
				}

				tgaImageData[currentByte]		= colorBuffer[2];	//  Write the 'R' byte

				tgaImageData[currentByte + 1]	= colorBuffer[1];	//  Write the 'G' byte

				tgaImageData[currentByte + 2]	= colorBuffer[0];	//  Write the 'B' byte


				//  If the image is 32bpp

				if(tgaImageBytes == 4)
					tgaImageData[currentByte + 3] = colorBuffer[3];	//  Write the 'A' byte


				currentByte += tgaImageBytes;	//  Increment the byte counter

				currentPixel++;					//  Increment the pixel counter


				//  If the program read to many pixels

				if(currentPixel > tgaImagePixels)
				{
					if(tgaImageData != NULL)
						free(tgaImageData);

					if(colorBuffer != NULL)
						free (colorBuffer);
					return 0;
				}
			}
		}
		//  If it's an RLE header

		else
		{
			chunkHeader -= 127;	//  Subtract 127 to get rid of the ID bit


			//  Read the next pixel and check if an error occurred

			if(fread(colorBuffer, 1, tgaImageBytes, file) != (size_t)tgaImageBytes)
			{
				if(tgaImageData != NULL)
					free(tgaImageData);

				if(colorBuffer != NULL)
					free (colorBuffer);
				return 0;
			}

			//  Start the RLE pixel reading loop

			for(short j = 0; j < chunkHeader; j++)
			{
				tgaImageData[currentByte]		= colorBuffer[2];	//  Write the 'R' byte

				tgaImageData[currentByte + 1]	= colorBuffer[1];	//  Write the 'G' byte

				tgaImageData[currentByte + 2]	= colorBuffer[0];	//  Write the 'B' byte


				//  If the image is 32bpp

				if(tgaImageBytes == 4)
					tgaImageData[currentByte + 3] = colorBuffer[3];	//  Write the 'A' byte

				
				currentByte += tgaImageBytes;	//  Increment the byte counter

				currentPixel++;					//  Increment the pixel counter


				//  If the program read to many pixels

				if(currentPixel > tgaImagePixels)
				{
					if(tgaImageData != NULL)
						free(tgaImageData);

					if(colorBuffer != NULL)
						free (colorBuffer);
					return 0;
				}
			}
		}

	} while(currentPixel < tgaImagePixels);

	//  Release the colorBuffer memory

	free(colorBuffer);

	return 1;
}