Method RenderTileLayer

src/game/map/render_layer.cpp:290–354

}

void CRenderLayerTile::RenderTileLayer(const ColorRGBA &Color, const CRenderLayerParams &Params, CTileLayerVisuals *pTileLayerVisuals)
{
	CTileLayerVisuals &Visuals = pTileLayerVisuals ? *pTileLayerVisuals : m_VisualTiles.value();
	if(Visuals.m_BufferContainerIndex == -1)
		return; // no visuals were created

	float ScreenX0, ScreenY0, ScreenX1, ScreenY1;
	Graphics()->GetScreen(&ScreenX0, &ScreenY0, &ScreenX1, &ScreenY1);

	int ScreenRectY0 = std::floor(ScreenY0 / 32);
	int ScreenRectX0 = std::floor(ScreenX0 / 32);
	int ScreenRectY1 = std::ceil(ScreenY1 / 32);
	int ScreenRectX1 = std::ceil(ScreenX1 / 32);

	if(IsVisibleInClipRegion(m_LayerClip))
	{
		// create the indice buffers we want to draw -- reuse them
		std::vector<char *> vpIndexOffsets;
		std::vector<unsigned int> vDrawCounts;

		int X0 = std::max(ScreenRectX0, 0);
		int X1 = std::min(ScreenRectX1, (int)Visuals.m_Width);
		int XR = X1 == std::numeric_limits<int>::min() ? X1 : X1 - 1;
		if(X0 <= XR)
		{
			int Y0 = std::max(ScreenRectY0, 0);
			int Y1 = std::min(ScreenRectY1, (int)Visuals.m_Height);

			unsigned long long Reserve = absolute(Y1 - Y0) + 1;
			vpIndexOffsets.reserve(Reserve);
			vDrawCounts.reserve(Reserve);

			for(int y = Y0; y < Y1; ++y)
			{
				dbg_assert(Visuals.m_vTilesOfLayer[y * Visuals.m_Width + XR].IndexBufferByteOffset() >= Visuals.m_vTilesOfLayer[y * Visuals.m_Width + X0].IndexBufferByteOffset(), "Tile offsets are not monotone.");
				unsigned int NumVertices = ((Visuals.m_vTilesOfLayer[y * Visuals.m_Width + XR].IndexBufferByteOffset() - Visuals.m_vTilesOfLayer[y * Visuals.m_Width + X0].IndexBufferByteOffset()) / sizeof(unsigned int)) + (Visuals.m_vTilesOfLayer[y * Visuals.m_Width + XR].DoDraw() ? 6lu : 0lu);

				if(NumVertices)
				{
					vpIndexOffsets.push_back((offset_ptr_size)Visuals.m_vTilesOfLayer[y * Visuals.m_Width + X0].IndexBufferByteOffset());
					vDrawCounts.push_back(NumVertices);
				}
			}

			int DrawCount = vpIndexOffsets.size();
			if(DrawCount != 0)
			{
				Graphics()->RenderTileLayer(Visuals.m_BufferContainerIndex, Color, vpIndexOffsets.data(), vDrawCounts.data(), DrawCount);
			}
		}
	}

	if(Params.m_RenderTileBorder && (ScreenRectX1 > (int)Visuals.m_Width || ScreenRectY1 > (int)Visuals.m_Height || ScreenRectX0 < 0 || ScreenRectY0 < 0))
	{
		RenderTileBorder(Color, ScreenRectX0, ScreenRectY0, ScreenRectX1, ScreenRectY1, &Visuals);
	}

	if(Params.m_DebugRenderTileClips && m_LayerClip.has_value())