Method AddHiresTextures

source/common/textures/texturemanager.cpp:617–675

//==========================================================================

void FTextureManager::AddHiresTextures (int wadnum)
{
	int firsttx = fileSystem.GetFirstEntry(wadnum);
	int lasttx = fileSystem.GetLastEntry(wadnum);

	TArray<FTextureID> tlist;

	if (firsttx == -1 || lasttx == -1)
	{
		return;
	}

	for (;firsttx <= lasttx; ++firsttx)
	{
		if (fileSystem.GetFileNamespace(firsttx) == ns_hires)
		{
			auto Name = fileSystem.GetFileShortName(firsttx);

			if (fileSystem.CheckNumForName (Name, ns_hires) == firsttx)
			{
				tlist.Clear();
				int amount = ListTextures(Name, tlist);
				if (amount == 0)
				{
					// A texture with this name does not yet exist
					auto newtex = MakeGameTexture(CreateTextureFromLump(firsttx), Name, ETextureType::Override);
					if (newtex != NULL)
					{
						AddGameTexture(newtex);
					}
				}
				else
				{
					for(unsigned int i = 0; i < tlist.Size(); i++)
					{
						FTexture * newtex = CreateTextureFromLump(firsttx);
						if (newtex != NULL)
						{
							auto oldtex = Textures[tlist[i].GetIndex()].Texture;

							// Replace the entire texture and adjust the scaling and offset factors.
							auto gtex = MakeGameTexture(newtex, nullptr, ETextureType::Override);
							gtex->SetWorldPanning(true);
							gtex->SetDisplaySize(oldtex->GetDisplayWidth(), oldtex->GetDisplayHeight());
							double xscale1 = oldtex->GetTexelLeftOffset(0) * gtex->GetScaleX() / oldtex->GetScaleX();
							double xscale2 = oldtex->GetTexelLeftOffset(1) * gtex->GetScaleX() / oldtex->GetScaleX();
							double yscale1 = oldtex->GetTexelTopOffset(0) * gtex->GetScaleY() / oldtex->GetScaleY();
							double yscale2 = oldtex->GetTexelTopOffset(1) * gtex->GetScaleY() / oldtex->GetScaleY();
							gtex->SetOffsets(0, xs_RoundToInt(xscale1), xs_RoundToInt(yscale1));
							gtex->SetOffsets(1, xs_RoundToInt(xscale2), xs_RoundToInt(yscale2));
							ReplaceTexture(tlist[i], gtex, true);
						}
					}
				}
				progressFunc();
			}
		}
	}