mirror of
https://github.com/LadybirdBrowser/ladybird
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44d90af3d6
Previously, SkTextBlob was built on every paint in DisplayListPlayerSkia::draw_glyph_run(), which meant: - Repeated work when the same display list is painted multiple times - Glyph arrays were allocated and populated on each paint Now the blob is built once during display list recording and cached in GlyphRun.
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2021, sin-ack <sin-ack@protonmail.com>
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* Copyright (c) 2024-2025, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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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/AtomicRefCounted.h>
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#include <AK/Forward.h>
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#include <AK/OwnPtr.h>
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#include <AK/Vector.h>
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#include <LibGfx/Font/Font.h>
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#include <LibGfx/FontCascadeList.h>
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#include <LibGfx/Forward.h>
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#include <LibGfx/Point.h>
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#include <LibGfx/Rect.h>
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#include <LibGfx/ShapeFeature.h>
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class SkTextBlob;
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namespace Gfx {
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struct DrawGlyph {
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FloatPoint position;
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size_t length_in_code_units { 0 };
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float glyph_width { 0.0 };
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u32 glyph_id { 0 };
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};
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class GlyphRun : public AtomicRefCounted<GlyphRun> {
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public:
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enum class TextType {
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Common,
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ContextDependent,
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EndPadding,
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Ltr,
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Rtl,
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};
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GlyphRun(Vector<DrawGlyph>&& glyphs, NonnullRefPtr<Font const> font, TextType text_type, float width);
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~GlyphRun();
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[[nodiscard]] Font const& font() const { return m_font; }
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[[nodiscard]] TextType text_type() const { return m_text_type; }
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[[nodiscard]] Vector<DrawGlyph> const& glyphs() const { return m_glyphs; }
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[[nodiscard]] Vector<DrawGlyph>& glyphs() { return m_glyphs; }
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[[nodiscard]] bool is_empty() const { return m_glyphs.is_empty(); }
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[[nodiscard]] float width() const { return m_width; }
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void ensure_text_blob(float scale) const;
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FloatRect cached_blob_bounds() const;
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SkTextBlob* cached_skia_text_blob() const;
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private:
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Vector<DrawGlyph> m_glyphs;
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NonnullRefPtr<Font const> m_font;
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TextType m_text_type;
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float m_width { 0 };
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struct CachedTextBlob;
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mutable OwnPtr<CachedTextBlob> m_cached_text_blob;
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};
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NonnullRefPtr<GlyphRun> shape_text(FloatPoint baseline_start, float letter_spacing, Utf16View const&, Gfx::Font const& font, GlyphRun::TextType, ShapeFeatures const& features);
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Vector<NonnullRefPtr<GlyphRun>> shape_text(FloatPoint baseline_start, Utf16View const&, FontCascadeList const&);
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float measure_text_width(Utf16View const&, Gfx::Font const& font, ShapeFeatures const& features);
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}
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