Add m-esr52 at 52.6.0

1 files changed, 108 insertions, 0 deletions

diff --git a/gfx/thebes/gfxGDIFont.h b/gfx/thebes/gfxGDIFont.h
new file mode 100644
index 000000000..9d8ac9552
--- /dev/null
+++ b/gfx/thebes/gfxGDIFont.h
@@ -0,0 +1,108 @@
+/* -*- 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_GDIFONT_H
+#define GFX_GDIFONT_H
+
+#include "mozilla/MemoryReporting.h"
+#include "gfxFont.h"
+#include "gfxGDIFontList.h"
+
+#include "nsDataHashtable.h"
+#include "nsHashKeys.h"
+
+#include "cairo.h"
+#include "usp10.h"
+
+class gfxGDIFont : public gfxFont
+{
+public:
+    gfxGDIFont(GDIFontEntry *aFontEntry,
+               const gfxFontStyle *aFontStyle,
+               bool aNeedsBold,
+               AntialiasOption anAAOption = kAntialiasDefault);
+
+    virtual ~gfxGDIFont();
+
+    HFONT GetHFONT() { return mFont; }
+
+    cairo_font_face_t   *CairoFontFace() { return mFontFace; }
+    cairo_scaled_font_t *CairoScaledFont() { return mScaledFont; }
+
+    /* overrides for the pure virtual methods in gfxFont */
+    virtual uint32_t GetSpaceGlyph() override;
+
+    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;
+
+    /* required for MathML to suppress effects of ClearType "padding" */
+    virtual gfxFont*
+    CopyWithAntialiasOption(AntialiasOption anAAOption) override;
+
+    // If the font has a cmap table, we handle it purely with harfbuzz;
+    // but if not (e.g. .fon fonts), we'll use a GDI callback to get glyphs.
+    virtual bool ProvidesGetGlyph() const override {
+        return !mFontEntry->HasCmapTable();
+    }
+
+    virtual uint32_t GetGlyph(uint32_t aUnicode,
+                              uint32_t aVarSelector) override;
+
+    virtual bool ProvidesGlyphWidths() const override { return true; }
+
+    // get hinted glyph width in pixels as 16.16 fixed-point value
+    virtual int32_t GetGlyphWidth(DrawTarget& aDrawTarget,
+                                  uint16_t aGID) override;
+
+    virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
+                                        FontCacheSizes* aSizes) const;
+    virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
+                                        FontCacheSizes* aSizes) const;
+
+    virtual FontType GetType() const override { return FONT_TYPE_GDI; }
+
+protected:
+    virtual const Metrics& GetHorizontalMetrics() override;
+
+    /* override to ensure the cairo font is set up properly */
+    virtual bool ShapeText(DrawTarget     *aDrawTarget,
+                           const char16_t *aText,
+                           uint32_t        aOffset,
+                           uint32_t        aLength,
+                           Script          aScript,
+                           bool            aVertical,
+                           gfxShapedText  *aShapedText) override;
+
+    void Initialize(); // creates metrics and Cairo fonts
+
+    // Fill the given LOGFONT record according to our style, but don't adjust
+    // the lfItalic field if we're going to use a cairo transform for fake
+    // italics.
+    void FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize, bool aUseGDIFakeItalic);
+
+    HFONT                 mFont;
+    cairo_font_face_t    *mFontFace;
+
+    Metrics              *mMetrics;
+    uint32_t              mSpaceGlyph;
+
+    bool                  mNeedsBold;
+
+    // cache of glyph IDs (used for non-sfnt fonts only)
+    mozilla::UniquePtr<nsDataHashtable<nsUint32HashKey,uint32_t> > mGlyphIDs;
+    SCRIPT_CACHE          mScriptCache;
+
+    // cache of glyph widths in 16.16 fixed-point pixels
+    mozilla::UniquePtr<nsDataHashtable<nsUint32HashKey,int32_t> > mGlyphWidths;
+};
+
+#endif /* GFX_GDIFONT_H */