56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
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#ifndef _customfont__hpp__included__
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#define _customfont__hpp__included__
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#include <vector>
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#include <cstdint>
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#include <cstdlib>
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#include <iostream>
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#include <stdexcept>
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#include <map>
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#include "framebuffer.hpp"
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class ligature_key
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{
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public:
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ligature_key(const std::vector<uint32_t>& key) throw(std::bad_alloc);
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const std::vector<uint32_t>& get() const throw() { return ikey; }
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size_t length() const throw() { return ikey.size(); }
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bool operator<(const ligature_key& key) const throw();
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bool operator<=(const ligature_key& key) const throw() { return !(key < *this); }
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bool operator==(const ligature_key& key) const throw();
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bool operator!=(const ligature_key& key) const throw() { return !(key == *this); }
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bool operator>=(const ligature_key& key) const throw() { return !(*this < key); }
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bool operator>(const ligature_key& key) const throw() { return key < *this; }
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private:
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std::vector<uint32_t> ikey;
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};
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struct font_glyph_data
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{
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font_glyph_data();
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font_glyph_data(std::istream& s);
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unsigned width;
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unsigned height;
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unsigned stride;
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std::vector<uint32_t> glyph; //Bitpacked, element breaks between rows.
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void render(framebuffer<false>& fb, int32_t x, int32_t y, premultiplied_color fg, premultiplied_color bg)
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const;
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void render(framebuffer<true>& fb, int32_t x, int32_t y, premultiplied_color fg, premultiplied_color bg) const;
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};
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struct custom_font
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{
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public:
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custom_font();
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custom_font(const std::string& file);
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void add(const ligature_key& key, const font_glyph_data& glyph) throw(std::bad_alloc);
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ligature_key best_ligature_match(const std::vector<uint32_t>& codepoints, size_t start) const
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throw(std::bad_alloc);
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const font_glyph_data& lookup_glyph(const ligature_key& key) const throw();
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unsigned get_rowadvance() const throw() { return rowadvance; }
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private:
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std::map<ligature_key, font_glyph_data> glyphs;
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unsigned rowadvance;
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};
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#endif
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