Function CelBlitOutline

Source/engine.cpp:535–587

* @brief Blit a solid colder shape one pixel larger then the given sprite shape, to the back buffer at the given coordianates * @param col Color index from current palette * @param sx Back buffer coordinate * @param sy Back buffer coordinate * @param pCelBuff CEL buffer * @param nCel CEL frame number * @param nWidth Width of sprite */

 * @param nWidth Width of sprite
 */
void CelBlitOutline(char col, int sx, int sy, BYTE *pCelBuff, int nCel, int nWidth)
{
	int nDataSize, w;
	BYTE *src, *dst, *end;
	BYTE width;

	assert(pCelBuff != NULL);
	assert(gpBuffer);

	src = CelGetFrameClipped(pCelBuff, nCel, &nDataSize);
	end = &src[nDataSize];
	dst = &gpBuffer[sx + BUFFER_WIDTH * sy];

	for (; src != end; dst -= BUFFER_WIDTH + nWidth) {
		for (w = nWidth; w;) {
			width = *src++;
			if (!(width & 0x80)) {
				w -= width;
				if (dst < gpBufEnd && dst > gpBufStart) {
					if (dst >= gpBufEnd - BUFFER_WIDTH) {
						while (width) {
							if (*src++) {
								dst[-BUFFER_WIDTH] = col;
								dst[-1] = col;
								dst[1] = col;
							}
							dst++;
							width--;
						}
					} else {
						while (width) {
							if (*src++) {
								dst[-BUFFER_WIDTH] = col;
								dst[-1] = col;
								dst[1] = col;
								dst[BUFFER_WIDTH] = col;
							}
							dst++;
							width--;
						}
					}
				} else {
					src += width;
					dst += width;
				}
			} else {
				width = -(char)width;
				dst += width;
				w -= width;
			}
		}
	}
}

/**
 * @brief Set the value of a single pixel in the back buffer, checks bounds