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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef COLR_FONTS_H
#define COLR_FONTS_H
#include "mozilla/gfx/2D.h"
#include "mozilla/UniquePtr.h"
#include "nsAtom.h"
#include "nsTArray.h"
#include "nsTHashtable.h"
struct hb_blob_t;
struct hb_face_t;
struct hb_font_t;
namespace mozilla {
namespace layout {
class TextDrawTarget;
}
namespace gfx {
class FontPaletteValueSet {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FontPaletteValueSet)
struct OverrideColor {
uint32_t mIndex = 0;
sRGBColor mColor;
};
struct PaletteValues {
enum { kLight = -1, kDark = -2 };
int32_t mBasePalette = 0; // 0-based index, or kLight/kDark constants
nsTArray<OverrideColor> mOverrides;
};
const PaletteValues* Lookup(nsAtom* aName, const nsACString& aFamily) const;
PaletteValues* Insert(nsAtom* aName, const nsACString& aFamily);
private:
~FontPaletteValueSet() = default;
struct PaletteHashKey {
RefPtr<nsAtom> mName;
nsCString mFamily;
PaletteHashKey() = delete;
PaletteHashKey(nsAtom* aName, const nsACString& aFamily)
: mName(aName), mFamily(aFamily) {}
PaletteHashKey(const PaletteHashKey& aKey) = default;
};
class HashEntry : public PLDHashEntryHdr {
public:
using KeyType = const PaletteHashKey&;
using KeyTypePointer = const PaletteHashKey*;
HashEntry() = delete;
explicit HashEntry(KeyTypePointer aKey) : mKey(*aKey) {}
HashEntry(HashEntry&& other) noexcept
: PLDHashEntryHdr(std::move(other)),
mKey(other.mKey),
mValue(std::move(other.mValue)) {
NS_ERROR("Should not be called");
}
~HashEntry() = default;
bool KeyEquals(const KeyTypePointer aKey) const {
return mKey.mName == aKey->mName && mKey.mFamily.Equals(aKey->mFamily);
}
static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
static PLDHashNumber HashKey(const KeyTypePointer aKey) {
return aKey->mName->hash() +
HashString(aKey->mFamily.get(), aKey->mFamily.Length());
}
enum { ALLOW_MEMMOVE = true };
PaletteHashKey mKey;
PaletteValues mValue;
};
nsTHashtable<HashEntry> mValues;
};
class COLRFonts {
public:
static bool ValidateColorGlyphs(hb_blob_t* aCOLR, hb_blob_t* aCPAL);
// COLRv0: color glyph is represented as a simple list of colored layers.
// (This is used only as an opaque pointer; the internal type is private.)
struct GlyphLayers;
static const GlyphLayers* GetGlyphLayers(hb_blob_t* aCOLR, uint32_t aGlyphId);
static bool PaintGlyphLayers(
hb_blob_t* aCOLR, hb_face_t* aFace, const GlyphLayers* aLayers,
DrawTarget* aDrawTarget, layout::TextDrawTarget* aTextDrawer,
ScaledFont* aScaledFont, DrawOptions aDrawOptions, const Point& aPoint,
const sRGBColor& aCurrentColor, const nsTArray<sRGBColor>* aColors);
// COLRv1 support: color glyph is represented by a directed acyclic graph of
// paint records.
// (This is used only as an opaque pointer; the internal type is private.)
struct GlyphPaintGraph;
static const GlyphPaintGraph* GetGlyphPaintGraph(hb_blob_t* aCOLR,
uint32_t aGlyphId);
static bool PaintGlyphGraph(
hb_blob_t* aCOLR, hb_font_t* aFont, const GlyphPaintGraph* aPaintGraph,
DrawTarget* aDrawTarget, layout::TextDrawTarget* aTextDrawer,
ScaledFont* aScaledFont, DrawOptions aDrawOptions, const Point& aPoint,
const sRGBColor& aCurrentColor, const nsTArray<sRGBColor>* aColors,
uint32_t aGlyphId, float aFontUnitsToPixels);
static Rect GetColorGlyphBounds(hb_blob_t* aCOLR, hb_font_t* aFont,
uint32_t aGlyphId, DrawTarget* aDrawTarget,
ScaledFont* aScaledFont,
float aFontUnitsToPixels);
static uint16_t GetColrTableVersion(hb_blob_t* aCOLR);
static UniquePtr<nsTArray<sRGBColor>> SetupColorPalette(
hb_face_t* aFace, const FontPaletteValueSet* aPaletteValueSet,
nsAtom* aFontPalette, const nsACString& aFamilyName);
};
} // namespace gfx
} // namespace mozilla
#endif // COLR_FONTS_H
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