Function RenderTile

Source/render.cpp:149–254

* @brief Blit current world CEL to the given buffer * @param pBuff Output buffer */

 * @param pBuff Output buffer
 */
void RenderTile(BYTE *pBuff)
{
	int i, j;
	char c, v, tile;
	BYTE *src, *dst, *tbl;
	DWORD m, *mask, *pFrameTable;

	dst = pBuff;
	pFrameTable = (DWORD *)pDungeonCels;

	src = &pDungeonCels[SDL_SwapLE32(pFrameTable[level_cel_block & 0xFFF])];
	tile = (level_cel_block & 0x7000) >> 12;
	tbl = &pLightTbl[256 * light_table_index];

	mask = &SolidMask[31];

	if (cel_transparency_active) {
		if (arch_draw_type == 0) {
			mask = &WallMask[31];
		}
		if (arch_draw_type == 1 && tile != RT_LTRIANGLE) {
			c = block_lvid[level_piece_id];
			if (c == 1 || c == 3) {
				mask = &LeftMask[31];
			}
		}
		if (arch_draw_type == 2 && tile != RT_RTRIANGLE) {
			c = block_lvid[level_piece_id];
			if (c == 2 || c == 3) {
				mask = &RightMask[31];
			}
		}
	}

#ifdef _DEBUG
	if (GetAsyncKeyState(VK_MENU) & 0x8000) {
		mask = &SolidMask[31];
	}
#endif

	switch (tile) {
	case RT_SQUARE:
		for (i = 32; i != 0; i--, dst -= BUFFER_WIDTH + 32, mask--) {
			RenderLine(&dst, &src, 32, tbl, *mask);
		}
		break;
	case RT_TRANSPARENT:
		for (i = 32; i != 0; i--, dst -= BUFFER_WIDTH + 32, mask--) {
			m = *mask;
			for (j = 32; j != 0; j -= v, v == 32 ? m = 0 : m <<= v) {
				v = *src++;
				if (v >= 0) {
					RenderLine(&dst, &src, v, tbl, m);
				} else {
					v = -v;
					dst += v;
				}
			}