gthfont.h

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#pragma once
 
#include <zenkit/Font.hh>
 
#include <Tempest/Painter>
 
class GthFont final {
  public:
    GthFont();
    GthFont(zenkit::Read& data, std::string_view ftex, const Tempest::Color &cl);
    GthFont(const GthFont&) = default;
    GthFont(GthFont&&)      = default;
 
    GthFont& operator = (const GthFont&) = default;
    GthFont& operator = (GthFont&&)      = default;
 
    int  pixelSize() const;
    void setScale(float s);
 
    void drawText(Tempest::Painter& p, int x, int y, int w, int h, std::string_view txt, Tempest::AlignFlag align, int firstLine=0) const;
    void drawText(Tempest::Painter& p, int x, int y, std::string_view txt) const;
 
    auto textSize(const std::string_view txt) const -> Tempest::Size;
    auto textSize(const char*    b, const char* e) const -> Tempest::Size;
    auto textSize(const uint8_t* b, const uint8_t* e) const -> Tempest::Size;
    auto textSize(int w, std::string_view txt) const -> Tempest::Size;
    auto lineCount(int w, std::string_view txt) const -> int32_t;
 
  private:
    std::shared_ptr<zenkit::Font>  pfnt;
    const Tempest::Texture2d*      tex       = nullptr;
    uint32_t                       fntHeight = 0;
    float                          scale     = 0;
    Tempest::Color                 color;
 
    const uint8_t* getLine(const uint8_t* txt, int bw, int &width) const;
    const uint8_t* getWord(const uint8_t* txt, int &width, int &space) const;
 
    static bool    isSpace(uint8_t ch);
    Tempest::Size  processText(Tempest::Painter* p, int x, int y, int w, int h, std::string_view txt, Tempest::AlignFlag align, int firstLine) const;
  };