atlas factory Windows implementation

openVulkanoCpp/Scene/Text/FontAtlasFactory.cpp

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+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include "FontAtlasFactory.hpp"
+#include "Scene/SdfFontAtlasGenerator.hpp"
+#include "Scene/BitmapFontAtlasGenerator.hpp"
+#include "Host/SystemInfo.hpp"
+
+namespace OpenVulkano::Scene
+{
+	FontAtlas::Ptr FontAtlasFactory::GetFontAtlasScalable(const std::string& fontIdentifier,
+	                                                      const std::set<uint32_t>& charset, bool msdf) const
+	{
+		const std::string fileName = FindFont(fontIdentifier);
+		if (fileName.empty())
+		{
+			return nullptr;
+		}
+
+		const std::set<uint32_t>& setRef = (charset.empty() ? FontAtlasGeneratorBase::LoadAllGlyphs(fontIdentifier) : charset);
+		FontIdentifier id(fontIdentifier, setRef, SubpixelLayout::UNKNOWN, 0, msdf);
+		if (m_atlasesCache.contains(id))
+		{
+			return m_atlasesCache.at(id);
+		}
+
+		if (msdf)
+		{
+			MsdfFontAtlasGenerator msdfGen;
+			msdfGen.GenerateAtlas(fileName, setRef);
+			m_atlasesCache[id] = msdfGen.GetAtlas();
+			return m_atlasesCache.at(id);
+		}
+		SdfFontAtlasGenerator sdfGen;
+		sdfGen.GenerateAtlas(fileName, setRef);
+		m_atlasesCache[id] = sdfGen.GetAtlas();
+		return m_atlasesCache.at(id);
+	}
+
+	FontAtlas::Ptr FontAtlasFactory::GetFontAtlas(const std::string& fontIdentifier, float ptSize,
+	                                              const std::set<uint32_t>& charset,
+	                                              std::optional<SubpixelLayout> subpixelLayout) const
+	{
+		const std::string fileName = FindFont(fontIdentifier);
+		if (fileName.empty())
+		{
+			return nullptr;
+		}
+
+		const std::set<uint32_t>& setRef = (charset.empty() ? FontAtlasGeneratorBase::LoadAllGlyphs(fontIdentifier) : charset);
+		FontIdentifier id(fontIdentifier, setRef, subpixelLayout.value_or(SubpixelLayout::UNKNOWN), ptSize, false);
+		if (m_atlasesCache.contains(id))
+		{
+			return m_atlasesCache.at(id);
+		}
+
+		FontPixelSizeConfig cfg(ptSize);
+		BitmapFontAtlasGenerator bitmapGen(cfg, subpixelLayout);
+		bitmapGen.GenerateAtlas(fileName, setRef);
+		m_atlasesCache[id] = bitmapGen.GetAtlas();
+		return m_atlasesCache.at(id);
+	}
+
+	std::string FontAtlasFactory::FindFont(const std::string& fontIdentifier) const
+	{
+		if (!std::filesystem::exists(fontIdentifier))
+		{
+			if (!m_allowSystemFonts)
+			{
+				return "";
+			}
+			return SystemInfo::GetSystemFontPath(fontIdentifier);
+		}
+		return fontIdentifier;
+	}
+}