Function iff_decompress_tile_rle

DevIL/src-IL/src/il_iff.cpp:394–431

char *iff_decompress_tile_rle(ILushort width, ILushort height, ILushort depth, 
							  char *compressedData, ILuint compressedDataSize)
{

	char	*channels[4];
	char	*data;
	int		i, k, row, column;
	ILuint	compressedStart = 0;

	// Decompress only in RGBA.
	if (depth != 4) {
		ilSetError(IL_ILLEGAL_FILE_VALUE);
		return NULL;
	}

	for (i = depth-1; i >= 0; --i) {
		channels[i] = iff_decompress_rle(width * height, compressedData, 
				      compressedDataSize, &compressedStart);
		if (channels[i] == NULL)
			return NULL;
	}

    // Build all the channels from the decompression into an RGBA array.
	data = (char*)ialloc(width * height * depth * sizeof(char));
	if (data == NULL)
		return NULL;

	for (row = 0; row < height; row++)
		for (column = 0; column < width; column++)
			for (k = 0; k < depth; k++)
				data[depth*(row*width + column) + k] =
					channels[k][row*width + column];
	
	ifree(channels[0]); ifree(channels[1]);
	ifree(channels[2]); ifree(channels[3]);

	return data;
}

char *iff_decompress_rle(ILuint numBytes, char *compressedData, 
							ILuint compressedDataSize,