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LibGfx: Insert pixel and ttf fonts into Typeface structure

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This adds a new structure 'Typeface' to the FontDatabase that
represents all fonts of the same family and variant.
It can contain a list of BitmapFonts with varying size but of
the same family and weight or a pointer to a single TTF font
for all sizes of this Typeface.
This commit is contained in:
Stephan Unverwerth 2021-01-02 14:49:20 +01:00 • committed by Andreas Kling
parent 2c4e13f14a
commit 179dba652e
13 changed files with 248 additions and 32 deletions
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37
Userland/Libraries/LibTTF/Font.h
View file

@ -32,6 +32,7 @@
#include <AK/RefCounted.h>
#include <AK/StringView.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Font.h>
#include <LibGfx/Size.h>
#include <LibTTF/Cmap.h>
#include <LibTTF/Glyf.h>
@ -75,7 +76,7 @@ public:
u16 units_per_em() const;
u32 glyph_id_for_codepoint(u32 codepoint) const { return m_cmap.glyph_id_for_codepoint(codepoint); }
String family() const;
String subfamily() const;
String variant() const;
private:
enum class Offsets {
@ -116,7 +117,7 @@ private:
Cmap m_cmap;
};
class ScaledFont {
class ScaledFont : public Gfx::Font {
public:
ScaledFont(RefPtr<Font> font, float point_width, float point_height, unsigned dpi_x = DEFAULT_DPI, unsigned dpi_y = DEFAULT_DPI)
: m_font(font)
@ -129,13 +130,35 @@ public:
ScaledFontMetrics metrics() const { return m_font->metrics(m_x_scale, m_y_scale); }
ScaledGlyphMetrics glyph_metrics(u32 glyph_id) const { return m_font->glyph_metrics(glyph_id, m_x_scale, m_y_scale); }
RefPtr<Gfx::Bitmap> raster_glyph(u32 glyph_id) const;
u32 glyph_count() const { return m_font->glyph_count(); }
int width(const StringView&) const;
int width(const Utf8View&) const;
int width(const Utf32View&) const;
// 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 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_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 int width(const StringView&) const override;
virtual int width(const Utf8View&) const override;
virtual int width(const Utf32View&) const override;
virtual String name() const override { return String::formatted("{} {}", family(), variant()); }
virtual bool is_fixed_width() const override { return false; } /* TODO */
virtual u8 glyph_spacing() const override { return m_x_scale; } /* TODO */
virtual int glyph_count() const override { return m_font->glyph_count(); }
virtual String family() const override { return m_font->family(); }
virtual String variant() const override { return m_font->variant(); }
virtual String qualified_name() const override { return String::formatted("{} {} {}", family(), presentation_size(), weight()); }
virtual const Font& bold_variant() const override { return *this; } /* TODO */
private:
RefPtr<Font> m_font;
RefPtr<TTF::Font> m_font;
float m_x_scale { 0.0 };
float m_y_scale { 0.0 };
mutable AK::HashMap<u32, RefPtr<Gfx::Bitmap>> m_cached_glyph_bitmaps;