89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
#pragma once
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#include "drape/glyph.hpp"
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#include "base/string_utils.hpp"
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#include <string>
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#include <vector>
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namespace dp
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{
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struct UnicodeBlock;
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// TODO(AB): Move to a separate file?
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namespace text
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{
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struct GlyphMetrics
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{
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GlyphFontAndId m_key;
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// TODO(AB): Store original font units or floats?
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int32_t m_xOffset;
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int32_t m_yOffset;
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int32_t m_xAdvance;
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// yAdvance is used only in vertical text layouts and is 0 for horizontal texts.
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int32_t m_yAdvance{0};
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bool operator==(GlyphMetrics const & other) const { return m_key == other.m_key; }
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};
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// TODO(AB): Move to a separate file?
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struct TextMetrics
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{
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int32_t m_lineWidthInPixels{0};
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int32_t m_maxLineHeightInPixels{0};
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std::vector<GlyphMetrics> m_glyphs;
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// Used for SplitText.
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bool m_isRTL{false};
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void AddGlyphMetrics(int16_t font, uint16_t glyphId, int32_t xOffset, int32_t yOffset, int32_t xAdvance,
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int32_t height)
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{
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m_glyphs.push_back({{font, glyphId}, xOffset, yOffset, xAdvance});
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if (m_glyphs.size() == 1)
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xAdvance -= xOffset;
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// if (yOffset > 0)
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// height += yOffset; // TODO(AB): Is it needed? Is it correct?
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m_lineWidthInPixels += xAdvance;
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m_maxLineHeightInPixels = std::max(m_maxLineHeightInPixels, height);
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}
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};
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} // namespace text
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class GlyphManager
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{
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public:
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struct Params
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{
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std::string m_uniBlocks;
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std::string m_whitelist;
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std::string m_blacklist;
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std::vector<std::string> m_fonts;
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};
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explicit GlyphManager(Params const & params);
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~GlyphManager();
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void MarkGlyphReady(GlyphFontAndId key);
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bool AreGlyphsReady(TGlyphs const & str) const;
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int GetFontIndex(strings::UniChar unicodePoint);
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int GetFontIndex(std::u16string_view sv);
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text::TextMetrics ShapeText(std::string_view utf8, int fontPixelHeight, int8_t lang);
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text::TextMetrics ShapeText(std::string_view utf8, int fontPixelHeight, char const * lang);
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GlyphImage GetGlyphImage(GlyphFontAndId key, int pixelHeight, bool sdf) const;
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private:
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// Immutable version can be called from any thread and doesn't require internal synchronization.
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int GetFontIndexImmutable(strings::UniChar unicodePoint) const;
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int FindFontIndexInBlock(UnicodeBlock const & block, strings::UniChar unicodePoint) const;
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struct Impl;
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std::unique_ptr<Impl> m_impl;
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};
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} // namespace dp
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