Function CelBlitSafe

Source/engine.cpp:191–222

* @brief Blit CEL sprite to the given buffer, checks for drawing outside the buffer * @param pDecodeTo The output buffer * @param pRLEBytes CEL pixel stream (run-length encoded) * @param nDataSize Size of CEL in bytes * @param nWidth Width of sprite */

 * @param nWidth Width of sprite
 */
void CelBlitSafe(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth)
{
	int i, w;
	BYTE width;
	BYTE *src, *dst;

	assert(pDecodeTo != NULL);
	assert(pRLEBytes != NULL);
	assert(gpBuffer);

	src = pRLEBytes;
	dst = pDecodeTo;
	w = nWidth;

	for (; src != &pRLEBytes[nDataSize]; dst -= BUFFER_WIDTH + w) {
		for (i = w; i;) {
			width = *src++;
			if (!(width & 0x80)) {
				i -= width;
				if (dst < gpBufEnd && dst > gpBufStart) {
					memcpy(dst, src, width);
				}
				src += width;
				dst += width;
			} else {
				width = -(char)width;
				dst += width;
				i -= width;
			}
		}
	}
}

/**
 * @brief Same as CelClippedDraw but checks for drawing outside the buffer