Function processTileImport

source/core/defparser.cpp:204–246

static void processTileImport(FScanner& sc, const char* cmd, FScriptPosition& pos, TileImport& imp)
{
	if (!ValidateTilenum(cmd, imp.tile, pos))
		return;

	auto tex = tbuild->tile[imp.tile].tileimage;
	if (imp.crc32 != INT64_MAX && int(imp.crc32) != tileGetCRC32(tex))
		return;

	if (imp.sizex != INT_MAX)
	{
		// the size must match the previous tile
		if (!tex)
		{
			if (imp.sizex != 0 || imp.sizey != 0) return;
		}
		else
		{
			if (tex->GetWidth() != imp.sizex || tex->GetHeight() != imp.sizey) return;
		}
	}

	imp.alphacut = clamp(imp.alphacut, 0, 255);

	if (imp.fn.IsNotEmpty() && tileImportFromTexture(sc, imp.fn.GetChars(), imp.tile, imp.alphacut, imp.istexture) < 0) return;

	tbuild->tile[imp.tile].extinfo.picanm.sf |= imp.flags;
	if (imp.surface != INT_MAX) tbuild->tile[imp.tile].extinfo.surftype = imp.surface;
	if (imp.shade != INT_MAX) tbuild->tile[imp.tile].extinfo.tileshade = imp.shade;

	// This is not quite the same as originally, for two reasons:
	// 1: Since these are texture properties now, there's no need to clear them.
	// 2: The original code assumed that an imported texture cannot have an offset. But this can import Doom patches and PNGs with grAb, so the situation is very different.
	auto itex = tbuild->tile[imp.tile].imported;

	if (imp.xoffset == INT_MAX) imp.xoffset = itex->GetTexelLeftOffset();
	else imp.xoffset = clamp(imp.xoffset, -128, 127);
	if (imp.yoffset == INT_MAX) imp.yoffset = itex->GetTexelTopOffset();
	else imp.yoffset = clamp(imp.yoffset, -128, 127);
	tbuild->tile[imp.tile].leftOffset = imp.xoffset;
	tbuild->tile[imp.tile].topOffset = imp.yoffset;
	if (imp.extra != INT_MAX) tbuild->tile[imp.tile].extinfo.picanm.extra = imp.extra;
}

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