Function iPreCache

DevIL/src-IL/src/il_files.cpp:541–576

ILboolean iPreCache(ILuint Size)
{
	// Reading from a memory lump, so don't cache.
	if (iread == iReadLump) {
		//iUnCache();  // DW: Removed 06-10-2002.
		return IL_TRUE;
	}

	if (Cache) {
		ifree(Cache);
	}

	if (Size == 0) {
		Size = 1;
	}

	Cache = (ILubyte*)ialloc(Size);
	if (Cache == NULL) {
		return IL_FALSE;
	}

	UseCache = IL_FALSE;
	CacheStartPos = itell();
	CacheSize = iread(Cache, 1, Size);
	if (CacheSize != Size)
		ilGetError();  // Get rid of the IL_FILE_READ_ERROR.

	//2003-09-09: uncommented the following line to prevent
	//an infinite loop in ilPreCache()
	CacheSize = Size;
	CachePos = 0;
	UseCache = IL_TRUE;
	CacheBytesRead = 0;

	return IL_TRUE;
}


void iUnCache()