51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
#pragma once
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#include <cstdint>
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#include <string>
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#include <vector>
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class GfxRenderer;
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class SdCardFont;
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struct SdCardFontFamilyInfo;
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class SdCardFontManager {
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public:
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SdCardFontManager() = default;
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~SdCardFontManager();
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SdCardFontManager(const SdCardFontManager&) = delete;
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SdCardFontManager& operator=(const SdCardFontManager&) = delete;
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// Load the single size closest to targetPtSize for a discovered family.
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// Only one .cpfont file is loaded; other sizes remain on disk. This keeps
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// resident interval + kern/ligature tables to one size's worth of memory
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// (see PR #1327 discussion re: Literata OOM).
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// Returns true on success.
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bool loadFamily(const SdCardFontFamilyInfo& family, GfxRenderer& renderer, uint8_t targetPtSize);
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// Unload everything, unregister from renderer.
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void unloadAll(GfxRenderer& renderer);
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// Look up the font ID for the loaded family. Returns 0 if nothing loaded
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// or familyName doesn't match.
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int getFontId(const std::string& familyName) const;
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// Get name of currently loaded family (empty if none).
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const std::string& currentFamilyName() const { return loadedFamilyName_; };
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// Point size that was actually loaded (closest match to targetPtSize).
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// 0 if nothing loaded.
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uint8_t currentPointSize() const { return loadedPointSize_; };
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private:
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struct LoadedFont {
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SdCardFont* font; // heap-allocated, owned
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int fontId;
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uint8_t size;
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};
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static int computeFontId(uint32_t contentHash, const char* familyName, uint8_t pointSize);
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std::string loadedFamilyName_;
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uint8_t loadedPointSize_ = 0;
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std::vector<LoadedFont> loaded_;
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};
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