зеркало из https://github.com/mozilla/gecko-dev.git
139 строки
4.3 KiB
C++
139 строки
4.3 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 COLR_FONTS_H
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#define COLR_FONTS_H
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#include "mozilla/gfx/2D.h"
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#include "mozilla/UniquePtr.h"
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#include "nsAtom.h"
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#include "nsTArray.h"
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#include "nsTHashtable.h"
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struct hb_blob_t;
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struct hb_face_t;
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struct hb_font_t;
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namespace mozilla {
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namespace layout {
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class TextDrawTarget;
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}
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namespace gfx {
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class FontPaletteValueSet {
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FontPaletteValueSet)
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struct OverrideColor {
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uint32_t mIndex = 0;
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sRGBColor mColor;
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};
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struct PaletteValues {
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enum { kLight = -1, kDark = -2 };
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int32_t mBasePalette = 0; // 0-based index, or kLight/kDark constants
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nsTArray<OverrideColor> mOverrides;
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};
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const PaletteValues* Lookup(nsAtom* aName, const nsACString& aFamily) const;
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PaletteValues* Insert(nsAtom* aName, const nsACString& aFamily);
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private:
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~FontPaletteValueSet() = default;
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struct PaletteHashKey {
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RefPtr<nsAtom> mName;
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nsCString mFamily;
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PaletteHashKey() = delete;
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PaletteHashKey(nsAtom* aName, const nsACString& aFamily)
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: mName(aName), mFamily(aFamily) {}
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PaletteHashKey(const PaletteHashKey& aKey) = default;
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};
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class HashEntry : public PLDHashEntryHdr {
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public:
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using KeyType = const PaletteHashKey&;
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using KeyTypePointer = const PaletteHashKey*;
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HashEntry() = delete;
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explicit HashEntry(KeyTypePointer aKey) : mKey(*aKey) {}
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HashEntry(HashEntry&& other) noexcept
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: PLDHashEntryHdr(std::move(other)),
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mKey(other.mKey),
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mValue(std::move(other.mValue)) {
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NS_ERROR("Should not be called");
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}
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~HashEntry() = default;
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bool KeyEquals(const KeyTypePointer aKey) const {
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return mKey.mName == aKey->mName && mKey.mFamily.Equals(aKey->mFamily);
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}
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static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
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static PLDHashNumber HashKey(const KeyTypePointer aKey) {
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return aKey->mName->hash() +
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HashString(aKey->mFamily.get(), aKey->mFamily.Length());
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}
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enum { ALLOW_MEMMOVE = true };
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PaletteHashKey mKey;
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PaletteValues mValue;
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};
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nsTHashtable<HashEntry> mValues;
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};
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class COLRFonts {
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public:
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static bool ValidateColorGlyphs(hb_blob_t* aCOLR, hb_blob_t* aCPAL);
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// COLRv0: color glyph is represented as a simple list of colored layers.
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// (This is used only as an opaque pointer; the internal type is private.)
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struct GlyphLayers;
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static const GlyphLayers* GetGlyphLayers(hb_blob_t* aCOLR, uint32_t aGlyphId);
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static bool PaintGlyphLayers(
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hb_blob_t* aCOLR, hb_face_t* aFace, const GlyphLayers* aLayers,
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DrawTarget* aDrawTarget, layout::TextDrawTarget* aTextDrawer,
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ScaledFont* aScaledFont, DrawOptions aDrawOptions, const Point& aPoint,
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const sRGBColor& aCurrentColor, const nsTArray<sRGBColor>* aColors);
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// COLRv1 support: color glyph is represented by a directed acyclic graph of
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// paint records.
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// (This is used only as an opaque pointer; the internal type is private.)
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struct GlyphPaintGraph;
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static const GlyphPaintGraph* GetGlyphPaintGraph(hb_blob_t* aCOLR,
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uint32_t aGlyphId);
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static bool PaintGlyphGraph(
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hb_blob_t* aCOLR, hb_font_t* aFont, const GlyphPaintGraph* aPaintGraph,
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DrawTarget* aDrawTarget, layout::TextDrawTarget* aTextDrawer,
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ScaledFont* aScaledFont, DrawOptions aDrawOptions, const Point& aPoint,
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const sRGBColor& aCurrentColor, const nsTArray<sRGBColor>* aColors,
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uint32_t aGlyphId, float aFontUnitsToPixels);
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static Rect GetColorGlyphBounds(hb_blob_t* aCOLR, hb_font_t* aFont,
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uint32_t aGlyphId, DrawTarget* aDrawTarget,
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ScaledFont* aScaledFont,
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float aFontUnitsToPixels);
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static uint16_t GetColrTableVersion(hb_blob_t* aCOLR);
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static UniquePtr<nsTArray<sRGBColor>> SetupColorPalette(
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hb_face_t* aFace, const FontPaletteValueSet* aPaletteValueSet,
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nsAtom* aFontPalette, const nsACString& aFamilyName);
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};
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} // namespace gfx
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} // namespace mozilla
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#endif // COLR_FONTS_H
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