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65 lines
1.4 KiB
C++
65 lines
1.4 KiB
C++
/*
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* Copyright (c) 2023, 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/HashMap.h>
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#include <AK/Noncopyable.h>
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#include <LibAccelGfx/GL.h>
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#include <LibGfx/Font/Font.h>
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namespace AccelGfx {
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class GlyphAtlas {
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AK_MAKE_NONCOPYABLE(GlyphAtlas);
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public:
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GlyphAtlas()
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: m_texture(GL::create_texture())
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{
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}
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~GlyphAtlas()
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{
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GL::delete_texture(m_texture);
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}
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static GlyphAtlas& the();
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struct GlyphsTextureKey {
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Gfx::Font const* font;
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u32 code_point;
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bool operator==(GlyphsTextureKey const& other) const
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{
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return font == other.font && code_point == other.code_point;
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}
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};
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void update(HashMap<Gfx::Font const*, HashTable<u32>> const& unique_glyphs);
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Optional<Gfx::IntRect> get_glyph_rect(Gfx::Font const*, u32 code_point) const;
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GL::Texture const& texture() const { return m_texture; }
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private:
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GL::Texture m_texture;
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HashMap<GlyphsTextureKey, Gfx::IntRect> m_glyphs_texture_map;
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};
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}
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namespace AK {
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template<>
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struct Traits<AccelGfx::GlyphAtlas::GlyphsTextureKey> : public DefaultTraits<AccelGfx::GlyphAtlas::GlyphsTextureKey> {
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static unsigned hash(AccelGfx::GlyphAtlas::GlyphsTextureKey const& key)
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{
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return pair_int_hash(ptr_hash(key.font), key.code_point);
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}
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};
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}
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