split font atlas generator to interface and implementation

2024-08-07 20:05:06 +03:00
parent 634b4431b3
commit 38d97f4c28
6 changed files with 160 additions and 101 deletions
--- a/openVulkanoCpp/Scene/MsdfFontAtlasGenerator.hpp
+++ b/openVulkanoCpp/Scene/MsdfFontAtlasGenerator.hpp
@@ -0,0 +1,60 @@
+/*
+ * 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/.
+ */
+
+#pragma once
+
+#if __has_include("msdfgen.h")
+
+#include <string>
+#include <optional>
+#include <map>
+#include <variant>
+#include "Scene/AtlasMetadata.hpp"
+#include "FontAtlasGenerator.hpp"
+#include "Scene/Texture.hpp"
+#include "msdfgen.h"
+#include "msdfgen-ext.h"
+#include "msdf-atlas-gen/msdf-atlas-gen.h"
+#define MSDFGEN_AVAILABLE
+
+namespace OpenVulkano::Scene
+{
+	using namespace msdfgen;
+	using namespace msdf_atlas;
+	using namespace OpenVulkano::Scene;
+
+	class MsdfFontAtlasGenerator : public FontAtlasGenerator
+	{
+	public:
+		using SdfGenerator = ImmediateAtlasGenerator<float, 1, sdfGenerator, BitmapAtlasStorage<msdfgen::byte, 1>>;
+		static Charset LoadAllGlyphs(const std::variant<std::string, Array<char>>& data);
+		void GenerateAtlas(const std::string& fontFile, const std::set<uint32_t>& charset,
+		                   const std::optional<std::string>& pngOutput = std::nullopt) override;
+		void GenerateAtlas(const Array<char>& fontData, int length, const std::set<uint32_t>& charset,
+		                   const std::optional<std::string>& pngOutput = std::nullopt) override;
+		void GenerateAtlas(const std::string& fontFile, const Charset& charset = Charset::ASCII,
+		                   const std::optional<std::string>& pngOutput = std::nullopt);
+		void GenerateAtlas(const msdfgen::byte* fontData, int length, const Charset& charset = Charset::ASCII,
+		                   const std::optional<std::string>& pngOutput = std::nullopt);
+		void SaveAtlasMetadataInfo(const std::string& outputFile, bool packIntoSingleFile = true) const override;
+		const Texture& GetAtlas() const override { return m_atlasTex; }
+		std::map<uint32_t, GlyphInfo>& GetGlyphsInfo() override { return m_symbols; }
+		AtlasMetadata& GetAtlasMetadata() override { return m_meta; }
+		SdfGenerator& GetFontAtlasGenerator() { return m_generator; }
+	private:
+		void InitFreetypeFromFile(FreetypeHandle*& ft, FontHandle*& font, const std::string& file);
+		void InitFreetypeFromBuffer(FreetypeHandle*& ft, FontHandle*& font, const msdfgen::byte* fontData, int length);
+		void Generate(FreetypeHandle* ft, FontHandle* font, const Charset& chset,
+		              const std::optional<std::string>& pngOutput);
+		void SavePng(const BitmapConstRef<byte, 1>& storage, const std::string& output, int channels) const;
+	private:
+		SdfGenerator m_generator;
+		Texture m_atlasTex;
+		AtlasMetadata m_meta;
+		std::map<uint32_t, GlyphInfo> m_symbols;
+	};
+}
+#endif