Method MapTiles_Draw

Source/Amiga/Graphics_Amiga.cpp:725–806

}

void cGraphics_Amiga::MapTiles_Draw() {
	mSurface->clearBuffer();
	uint8* Target = mSurface->GetSurfaceBuffer();

	uint8* CurrentMapPtr = mFodder->mMap->data() + mFodder->mMapTile_Ptr;

	// Y
	for (uint16 cx = 0; cx <= g_Fodder->getWindowRows() + 1; ++cx) {

		uint8* TargetRow = Target;

		uint16 StartY = 0;

		if (cx == 0)
			StartY = mFodder->mMapTile_RowOffset;

		if (CurrentMapPtr >= mFodder->mMap->data()) {

			uint8* MapRowPtr = CurrentMapPtr;

			// X
			for (uint16 cx2 = 0; cx2 <= g_Fodder->getWindowColumns() + 1; ++cx2) {
				uint8* TargetTmp = TargetRow;

				if (MapRowPtr >= mFodder->mMap->data() + mFodder->mMap->size())
					break;

				uint16 Tile = readLE<uint16>(MapRowPtr) & 0x1FF;
				if (Tile > 0x1C0)
					Tile = 0;

				Tile <<= 7;

				uint8* TilePtr = mBlkData->data() + Tile;
				uint16 StartX = 0;

				TilePtr += StartY * 2;

				if (cx2 == 0)
					StartX = mFodder->mMapTile_ColumnOffset;

				// Each bitfield
				for (uint16 BitField = 0; BitField < 4; ++BitField) {

					// Each Tile Row
					for (uint16 i = StartY; i < 16; ++i) {

						if (TilePtr > mBlkData->data() + mBlkData->size())
							continue;

						uint16 RowData = readBEWord(TilePtr);
						TilePtr += 2;
						RowData <<= StartX;

						// Each pixel of a Tile Row
						for (uint16 x = StartX; x < 16; ++x) {
							uint8 Bit = (RowData & 0x8000) ? 1 : 0;
							RowData <<= 1;