summaryrefslogtreecommitdiffstats
path: root/gfx/thebes/COLRFonts.h
diff options
context:
space:
mode:
Diffstat (limited to 'gfx/thebes/COLRFonts.h')
-rw-r--r--gfx/thebes/COLRFonts.h138
1 files changed, 138 insertions, 0 deletions
diff --git a/gfx/thebes/COLRFonts.h b/gfx/thebes/COLRFonts.h
new file mode 100644
index 0000000000..57129f1364
--- /dev/null
+++ b/gfx/thebes/COLRFonts.h
@@ -0,0 +1,138 @@
+/* -*- 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 nsTArray<sRGBColor> CreateColorPalette(
+ hb_face_t* aFace, const FontPaletteValueSet* aPaletteValueSet,
+ nsAtom* aFontPalette, const nsACString& aFamilyName);
+};
+
+} // namespace gfx
+
+} // namespace mozilla
+
+#endif // COLR_FONTS_H