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LibGfx: Add support for WOFF2 compressed web fonts

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Co-authored-by: Luke Wilde <lukew@serenityos.org>
This commit is contained in:
Andreas Kling 2023-08-12 15:19:14 +02:00
parent 43c9c2ef02
commit 9ba4c33940
3 changed files with 1138 additions and 0 deletions
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1
Userland/Libraries/LibGfx/CMakeLists.txt
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@ -24,6 +24,7 @@ set(SOURCES
Font/ScaledFont.cpp
Font/Typeface.cpp
Font/WOFF/Font.cpp
Font/WOFF2/Font.cpp
GradientPainting.cpp
ICC/BinaryWriter.cpp
ICC/Profile.cpp

1080
Userland/Libraries/LibGfx/Font/WOFF2/Font.cpp Normal file
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57
Userland/Libraries/LibGfx/Font/WOFF2/Font.h Normal file
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@ -0,0 +1,57 @@
/*
* Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
* Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Noncopyable.h>
#include <AK/OwnPtr.h>
#include <AK/RefCounted.h>
#include <AK/Stream.h>
#include <AK/String.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Font/VectorFont.h>
namespace WOFF2 {
class Font : public Gfx::VectorFont {
AK_MAKE_NONCOPYABLE(Font);
public:
static ErrorOr<NonnullRefPtr<Font>> try_load_from_file(StringView path);
static ErrorOr<NonnullRefPtr<Font>> try_load_from_externally_owned_memory(SeekableStream&);
static ErrorOr<NonnullRefPtr<Font>> try_load_from_externally_owned_memory(ReadonlyBytes);
virtual Gfx::ScaledFontMetrics metrics(float x_scale, float y_scale) const override { return m_input_font->metrics(x_scale, y_scale); }
virtual Gfx::ScaledGlyphMetrics glyph_metrics(u32 glyph_id, float x_scale, float y_scale, float point_width, float point_height) const override { return m_input_font->glyph_metrics(glyph_id, x_scale, y_scale, point_width, point_height); }
virtual float glyphs_horizontal_kerning(u32 left_glyph_id, u32 right_glyph_id, float x_scale) const override { return m_input_font->glyphs_horizontal_kerning(left_glyph_id, right_glyph_id, x_scale); }
virtual RefPtr<Gfx::Bitmap> rasterize_glyph(u32 glyph_id, float x_scale, float y_scale, Gfx::GlyphSubpixelOffset subpixel_offset) const override
{
return m_input_font->rasterize_glyph(glyph_id, x_scale, y_scale, subpixel_offset);
}
virtual u32 glyph_count() const override { return m_input_font->glyph_count(); }
virtual u16 units_per_em() const override { return m_input_font->units_per_em(); }
virtual u32 glyph_id_for_code_point(u32 code_point) const override { return m_input_font->glyph_id_for_code_point(code_point); }
virtual DeprecatedString family() const override { return m_input_font->family(); }
virtual DeprecatedString variant() const override { return m_input_font->variant(); }
virtual u16 weight() const override { return m_input_font->weight(); }
virtual u16 width() const override { return m_input_font->width(); }
virtual u8 slope() const override { return m_input_font->slope(); }
virtual bool is_fixed_width() const override { return m_input_font->is_fixed_width(); }
virtual bool has_color_bitmaps() const override { return m_input_font->has_color_bitmaps(); }
private:
Font(NonnullRefPtr<Gfx::VectorFont> input_font, ByteBuffer input_font_buffer)
: m_input_font_buffer(move(input_font_buffer))
, m_input_font(move(input_font))
{
}
ByteBuffer m_input_font_buffer;
NonnullRefPtr<Gfx::VectorFont> m_input_font;
};
}