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df9da39b74
This does not change behavior for users; it is preparation for the following patch, which will want the ability to hold an additional strong reference to a resolved palette. So we can no longer just own it via a UniquePtr; we make it a RefPtr instead. Differential Revision: https://phabricator.services.mozilla.com/D200138
73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef FONT_PALETTE_CACHE_H
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#define FONT_PALETTE_CACHE_H
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#include "mozilla/gfx/Types.h"
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#include "mozilla/MruCache.h"
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#include "mozilla/HashFunctions.h"
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#include "mozilla/RefPtr.h"
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#include "nsAtom.h"
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#include "nsTArray.h"
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#include <utility>
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class gfxFontEntry;
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namespace mozilla::gfx {
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class FontPaletteValueSet;
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// A resolved font palette as an array of colors.
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class FontPalette {
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FontPalette);
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public:
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FontPalette() = default;
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explicit FontPalette(nsTArray<mozilla::gfx::sRGBColor>&& aColors)
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: mColors(std::move(aColors)) {}
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const nsTArray<mozilla::gfx::sRGBColor>* Colors() const { return &mColors; }
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private:
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~FontPalette() = default;
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nsTArray<mozilla::gfx::sRGBColor> mColors;
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};
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// MRU cache used for resolved color-font palettes, to avoid reconstructing
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// the palette for each glyph rendered with a given font.
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using CacheKey = std::pair<RefPtr<gfxFontEntry>, RefPtr<nsAtom>>;
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struct CacheData {
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CacheKey mKey;
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RefPtr<FontPalette> mPalette;
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};
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class PaletteCache
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: public mozilla::MruCache<CacheKey, CacheData, PaletteCache> {
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public:
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explicit PaletteCache(const FontPaletteValueSet* aPaletteValueSet = nullptr)
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: mPaletteValueSet(aPaletteValueSet) {}
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void SetPaletteValueSet(const FontPaletteValueSet* aSet);
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already_AddRefed<FontPalette> GetPaletteFor(gfxFontEntry* aFontEntry,
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nsAtom* aPaletteName);
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static mozilla::HashNumber Hash(const CacheKey& aKey) {
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return mozilla::HashGeneric(aKey.first.get(), aKey.second.get());
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}
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static bool Match(const CacheKey& aKey, const CacheData& aVal) {
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return aVal.mKey == aKey;
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}
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protected:
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const FontPaletteValueSet* mPaletteValueSet = nullptr;
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};
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} // namespace mozilla::gfx
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#endif
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