Function CelBlitLightSafe

Source/engine.cpp:257–311

* @brief Blit CEL sprite, and apply lighting, 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 tbl Palette translation table */

 * @param tbl Palette translation table
 */
void CelBlitLightSafe(BYTE *pDecodeTo, BYTE *pRLEBytes, int nDataSize, int nWidth, BYTE *tbl)
{
	int i, w;
	BYTE width;
	BYTE *src, *dst;

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

	src = pRLEBytes;
	dst = pDecodeTo;
	if (tbl == NULL)
		tbl = &pLightTbl[light_table_index * 256];
	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) {
					if (width & 1) {
						dst[0] = tbl[src[0]];
						src++;
						dst++;
					}
					width >>= 1;
					if (width & 1) {
						dst[0] = tbl[src[0]];
						dst[1] = tbl[src[1]];
						src += 2;
						dst += 2;
					}
					width >>= 1;
					for (; width; width--) {
						dst[0] = tbl[src[0]];
						dst[1] = tbl[src[1]];
						dst[2] = tbl[src[2]];
						dst[3] = tbl[src[3]];
						src += 4;
						dst += 4;
					}
				} else {
					src += width;
					dst += width;
				}
			} else {
				width = -(char)width;
				dst += width;
				i -= width;
			}
		}
	}
}

/**
 * @brief Same as CelBlitLightSafe, with transparancy applied