mirror of
https://github.com/RGBCube/serenity
synced 2025-05-18 23:05:07 +00:00
69c33bd4ca
Before this change we always returned the font's point size as the x-height which was basically never correct. We now get it from the OS/2 table (if one with version >= 2 is available in the file). Otherwise we fall back to using the ascent of the 'x' glyph. Most fonts appear to have a sufficiently modern OS/2 table.
54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
/*
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Noncopyable.h>
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#include <AK/RefCounted.h>
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#include <LibGfx/Font/Font.h>
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#include <LibGfx/Forward.h>
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namespace Gfx {
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struct ScaledFontMetrics {
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float ascender { 0 };
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float descender { 0 };
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float line_gap { 0 };
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float x_height { 0 };
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float height() const
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{
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return ascender + descender;
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}
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};
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struct ScaledGlyphMetrics {
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float ascender;
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float descender;
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float advance_width;
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float left_side_bearing;
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};
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class VectorFont : public RefCounted<VectorFont> {
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public:
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virtual ~VectorFont() { }
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virtual ScaledFontMetrics metrics(float x_scale, float y_scale) const = 0;
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virtual ScaledGlyphMetrics glyph_metrics(u32 glyph_id, float x_scale, float y_scale, float point_width, float point_height) const = 0;
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virtual float glyphs_horizontal_kerning(u32 left_glyph_id, u32 right_glyph_id, float x_scale) const = 0;
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virtual RefPtr<Gfx::Bitmap> rasterize_glyph(u32 glyph_id, float x_scale, float y_scale, GlyphSubpixelOffset) const = 0;
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virtual u32 glyph_count() const = 0;
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virtual u16 units_per_em() const = 0;
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virtual u32 glyph_id_for_code_point(u32 code_point) const = 0;
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virtual DeprecatedString family() const = 0;
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virtual DeprecatedString variant() const = 0;
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virtual u16 weight() const = 0;
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virtual u16 width() const = 0;
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virtual u8 slope() const = 0;
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virtual bool is_fixed_width() const = 0;
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virtual bool has_color_bitmaps() const = 0;
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};
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}
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