Add m-esr52 at 52.6.0

1 files changed, 102 insertions, 0 deletions

diff --git a/gfx/thebes/gfxMacFont.h b/gfx/thebes/gfxMacFont.h
new file mode 100644
index 000000000..d12cc717b
--- /dev/null
+++ b/gfx/thebes/gfxMacFont.h
@@ -0,0 +1,102 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * 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 GFX_MACFONT_H
+#define GFX_MACFONT_H
+
+#include "mozilla/MemoryReporting.h"
+#include "gfxFont.h"
+#include "cairo.h"
+#include <ApplicationServices/ApplicationServices.h>
+
+class MacOSFontEntry;
+
+class gfxMacFont : public gfxFont
+{
+public:
+    gfxMacFont(MacOSFontEntry *aFontEntry, const gfxFontStyle *aFontStyle,
+               bool aNeedsBold);
+
+    virtual ~gfxMacFont();
+
+    CGFontRef GetCGFontRef() const { return mCGFont; }
+
+    /* overrides for the pure virtual methods in gfxFont */
+    virtual uint32_t GetSpaceGlyph() override {
+        return mSpaceGlyph;
+    }
+
+    virtual bool SetupCairoFont(DrawTarget* aDrawTarget) override;
+
+    /* override Measure to add padding for antialiasing */
+    virtual RunMetrics Measure(const gfxTextRun *aTextRun,
+                               uint32_t aStart, uint32_t aEnd,
+                               BoundingBoxType aBoundingBoxType,
+                               DrawTarget *aDrawTargetForTightBoundingBox,
+                               Spacing *aSpacing,
+                               uint16_t aOrientation) override;
+
+    // We need to provide hinted (non-linear) glyph widths if using a font
+    // with embedded color bitmaps (Apple Color Emoji), as Core Text renders
+    // the glyphs with non-linear scaling at small pixel sizes.
+    virtual bool ProvidesGlyphWidths() const override {
+        return mFontEntry->HasFontTable(TRUETYPE_TAG('s','b','i','x'));
+    }
+
+    virtual int32_t GetGlyphWidth(DrawTarget& aDrawTarget,
+                                  uint16_t aGID) override;
+
+    virtual already_AddRefed<mozilla::gfx::ScaledFont>
+    GetScaledFont(mozilla::gfx::DrawTarget *aTarget) override;
+
+    virtual already_AddRefed<mozilla::gfx::GlyphRenderingOptions>
+      GetGlyphRenderingOptions(const TextRunDrawParams* aRunParams = nullptr) override;
+
+    virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
+                                        FontCacheSizes* aSizes) const override;
+    virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
+                                        FontCacheSizes* aSizes) const override;
+
+    virtual FontType GetType() const override { return FONT_TYPE_MAC; }
+
+protected:
+    virtual const Metrics& GetHorizontalMetrics() override {
+        return mMetrics;
+    }
+
+    // override to prefer CoreText shaping with fonts that depend on AAT
+    virtual bool ShapeText(DrawTarget     *aDrawTarget,
+                           const char16_t *aText,
+                           uint32_t        aOffset,
+                           uint32_t        aLength,
+                           Script          aScript,
+                           bool            aVertical,
+                           gfxShapedText  *aShapedText) override;
+
+    void InitMetrics();
+    void InitMetricsFromPlatform();
+
+    // Get width and glyph ID for a character; uses aConvFactor
+    // to convert font units as returned by CG to actual dimensions
+    gfxFloat GetCharWidth(CFDataRef aCmap, char16_t aUniChar,
+                          uint32_t *aGlyphID, gfxFloat aConvFactor);
+
+    // a weak reference to the CoreGraphics font: this is owned by the
+    // MacOSFontEntry, it is not retained or released by gfxMacFont
+    CGFontRef             mCGFont;
+
+    // a Core Text font reference, created only if we're using CT to measure
+    // glyph widths; otherwise null.
+    CTFontRef             mCTFont;
+
+    cairo_font_face_t    *mFontFace;
+
+    mozilla::UniquePtr<gfxFontShaper> mCoreTextShaper;
+
+    Metrics               mMetrics;
+    uint32_t              mSpaceGlyph;
+};
+
+#endif /* GFX_MACFONT_H */