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LibGfx+LibTTF: Allow Painter to draw TTF glyphs

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This commit is contained in:
Stephan Unverwerth 2021-01-02 18:22:22 +01:00 • committed by Andreas Kling
parent 0f41f5d9ba
commit 85158dc0ad
5 changed files with 66 additions and 14 deletions
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24
Userland/Libraries/LibTTF/Font.h
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@ -123,6 +123,8 @@ class ScaledFont : public Gfx::Font {
public:
ScaledFont(RefPtr<TTF::Font> font, float point_width, float point_height, unsigned dpi_x = DEFAULT_DPI, unsigned dpi_y = DEFAULT_DPI)
: m_font(font)
, m_point_width(point_width)
, m_point_height(point_height)
{
float units_per_em = m_font->units_per_em();
m_x_scale = (point_width * dpi_x) / (POINTS_PER_INCH * units_per_em);
@ -135,18 +137,18 @@ public:
// Gfx::Font implementation
virtual NonnullRefPtr<Font> clone() const override { return *this; } /* TODO */
virtual u8 presentation_size() const override { return (u8)m_y_scale; }
virtual u16 weight() const override { return 400; } /* TODO */
virtual u8 presentation_size() const override { return m_point_height; }
virtual u16 weight() const override { return m_font->weight(); }
virtual Gfx::Glyph glyph(u32 code_point) const override;
virtual u8 glyph_width(size_t ch) const override;
virtual int glyph_or_emoji_width(u32 code_point) const override;
virtual u8 glyph_height() const override { return m_y_scale; } /* TODO */
virtual int x_height() const override { return m_y_scale; } /* TODO */
virtual u8 min_glyph_width() const override { return 1; } /* TODO */
virtual u8 max_glyph_width() const override { return m_x_scale; } /* TODO */
virtual u8 glyph_height() const override { return m_point_height; } /* TODO */
virtual int x_height() const override { return m_point_height; } /* TODO */
virtual u8 min_glyph_width() const override { return 1; } /* TODO */
virtual u8 max_glyph_width() const override { return m_point_height; } /* TODO */
virtual u8 glyph_fixed_width() const override;
virtual u8 baseline() const override { return m_y_scale; } /* TODO */
virtual u8 mean_line() const override { return m_y_scale; } /* TODO */
virtual u8 baseline() const override { return m_point_height; } /* TODO */
virtual u8 mean_line() const override { return m_point_height; } /* TODO */
virtual int width(const StringView&) const override;
virtual int width(const Utf8View&) const override;
virtual int width(const Utf32View&) const override;
@ -161,8 +163,10 @@ public:
private:
RefPtr<TTF::Font> m_font;
float m_x_scale { 0.0 };
float m_y_scale { 0.0 };
float m_x_scale { 0.0f };
float m_y_scale { 0.0f };
float m_point_width { 0.0f };
float m_point_height { 0.0f };
mutable AK::HashMap<u32, RefPtr<Gfx::Bitmap>> m_cached_glyph_bitmaps;
};