Function DrawCell

Source/engine/render/scrollrt.cpp:536–641

* @brief Render a cell * @param out Target buffer * @param tilePosition dPiece coordinates * @param targetBufferPosition Target buffer coordinates */

 * @param targetBufferPosition Target buffer coordinates
 */
void DrawCell(const Surface &out, Point tilePosition, Point targetBufferPosition)
{
	const uint16_t levelPieceId = dPiece[tilePosition.x][tilePosition.y];
	const MICROS *pMap = &DPieceMicros[levelPieceId];

	const uint8_t *tbl = LightTables[LightTableIndex].data();
#ifdef _DEBUG
	if (DebugPath && MyPlayer->IsPositionInPath(tilePosition))
		tbl = GetPauseTRN();
#endif

	bool transparency = TileHasAny(levelPieceId, TileProperties::Transparent) && TransList[dTransVal[tilePosition.x][tilePosition.y]];
#ifdef _DEBUG
	if ((SDL_GetModState() & KMOD_ALT) != 0)
		transparency = false;
#endif
	const bool foliage = !TileHasAny(levelPieceId, TileProperties::Solid);

	const auto getFirstTileMaskLeft = [=](TileType tile) -> MaskType {
		if (transparency) {
			switch (tile) {
			case TileType::LeftTrapezoid:
			case TileType::TransparentSquare:
				return TileHasAny(levelPieceId, TileProperties::TransparentLeft)
				    ? MaskType::Left
				    : MaskType::Solid;
			case TileType::LeftTriangle:
				return MaskType::Solid;
			default:
				return MaskType::Transparent;
			}
		}
		if (foliage)
			return MaskType::LeftFoliage;
		return MaskType::Solid;
	};

	const auto getFirstTileMaskRight = [=](TileType tile) -> MaskType {
		if (transparency) {
			switch (tile) {
			case TileType::RightTrapezoid:
			case TileType::TransparentSquare:
				return TileHasAny(levelPieceId, TileProperties::TransparentRight)
				    ? MaskType::Right
				    : MaskType::Solid;
			case TileType::RightTriangle:
				return MaskType::Solid;
			default:
				return MaskType::Transparent;
			}
		}
		if (foliage)
			return MaskType::RightFoliage;
		return MaskType::Solid;
	};

	// The first micro tile may be rendered with a foliage mask.
	// Only `TransparentSquare` tiles are rendered when `foliage` is true.