Split SkFontHost_win_dw.

src/ports/SkTypeface_win_dw.h

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkTypeface_win_dw_DEFINED
+#define SkTypeface_win_dw_DEFINED
+
+#include "SkAdvancedTypefaceMetrics.h"
+#include "SkDWrite.h"
+#include "SkHRESULT.h"
+#include "SkTScopedComPtr.h"
+#include "SkTypeface.h"
+#include "SkTypefaceCache.h"
+#include "SkTypes.h"
+
+#include <dwrite.h>
+
+class SkFontDescriptor;
+struct SkScalerContextRec;
+
+static SkTypeface::Style get_style(IDWriteFont* font) {
+    int style = SkTypeface::kNormal;
+    DWRITE_FONT_WEIGHT weight = font->GetWeight();
+    if (DWRITE_FONT_WEIGHT_DEMI_BOLD <= weight) {
+        style |= SkTypeface::kBold;
+    }
+    DWRITE_FONT_STYLE angle = font->GetStyle();
+    if (DWRITE_FONT_STYLE_OBLIQUE == angle || DWRITE_FONT_STYLE_ITALIC == angle) {
+        style |= SkTypeface::kItalic;
+    }
+    return static_cast<SkTypeface::Style>(style);
+}
+
+class DWriteFontTypeface : public SkTypeface {
+private:
+    DWriteFontTypeface(SkTypeface::Style style, SkFontID fontID,
+                       IDWriteFactory* factory,
+                       IDWriteFontFace* fontFace,
+                       IDWriteFont* font,
+                       IDWriteFontFamily* fontFamily,
+                       IDWriteFontFileLoader* fontFileLoader = NULL,
+                       IDWriteFontCollectionLoader* fontCollectionLoader = NULL)
+        : SkTypeface(style, fontID, false)
+        , fFactory(SkRefComPtr(factory))
+        , fDWriteFontCollectionLoader(SkSafeRefComPtr(fontCollectionLoader))
+        , fDWriteFontFileLoader(SkSafeRefComPtr(fontFileLoader))
+        , fDWriteFontFamily(SkRefComPtr(fontFamily))
+        , fDWriteFont(SkRefComPtr(font))
+        , fDWriteFontFace(SkRefComPtr(fontFace))
+    { }
+
+public:
+    SkTScopedComPtr<IDWriteFactory> fFactory;
+    SkTScopedComPtr<IDWriteFontCollectionLoader> fDWriteFontCollectionLoader;
+    SkTScopedComPtr<IDWriteFontFileLoader> fDWriteFontFileLoader;
+    SkTScopedComPtr<IDWriteFontFamily> fDWriteFontFamily;
+    SkTScopedComPtr<IDWriteFont> fDWriteFont;
+    SkTScopedComPtr<IDWriteFontFace> fDWriteFontFace;
+
+    static DWriteFontTypeface* Create(IDWriteFactory* factory,
+                                      IDWriteFontFace* fontFace,
+                                      IDWriteFont* font,
+                                      IDWriteFontFamily* fontFamily,
+                                      IDWriteFontFileLoader* fontFileLoader = NULL,
+                                      IDWriteFontCollectionLoader* fontCollectionLoader = NULL) {
+        SkTypeface::Style style = get_style(font);
+        SkFontID fontID = SkTypefaceCache::NewFontID();
+        return SkNEW_ARGS(DWriteFontTypeface, (style, fontID,
+                                               factory, fontFace, font, fontFamily,
+                                               fontFileLoader, fontCollectionLoader));
+    }
+
+protected:
+    virtual void weak_dispose() const SK_OVERRIDE {
+        if (fDWriteFontCollectionLoader.get()) {
+            HRV(fFactory->UnregisterFontCollectionLoader(fDWriteFontCollectionLoader.get()));
+        }
+        if (fDWriteFontFileLoader.get()) {
+            HRV(fFactory->UnregisterFontFileLoader(fDWriteFontFileLoader.get()));
+        }
+
+        //SkTypefaceCache::Remove(this);
+        INHERITED::weak_dispose();
+    }
+
+    virtual SkStream* onOpenStream(int* ttcIndex) const SK_OVERRIDE;
+    virtual SkScalerContext* onCreateScalerContext(const SkDescriptor*) const SK_OVERRIDE;
+    virtual void onFilterRec(SkScalerContextRec*) const SK_OVERRIDE;
+    virtual SkAdvancedTypefaceMetrics* onGetAdvancedTypefaceMetrics(
+                                SkAdvancedTypefaceMetrics::PerGlyphInfo,
+                                const uint32_t*, uint32_t) const SK_OVERRIDE;
+    virtual void onGetFontDescriptor(SkFontDescriptor*, bool*) const SK_OVERRIDE;
+    virtual int onCharsToGlyphs(const void* chars, Encoding encoding,
+                                uint16_t glyphs[], int glyphCount) const SK_OVERRIDE;
+    virtual int onCountGlyphs() const SK_OVERRIDE;
+    virtual int onGetUPEM() const SK_OVERRIDE;
+    virtual SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const SK_OVERRIDE;
+    virtual int onGetTableTags(SkFontTableTag tags[]) const SK_OVERRIDE;
+    virtual size_t onGetTableData(SkFontTableTag, size_t offset,
+                                  size_t length, void* data) const SK_OVERRIDE;
+
+private:
+    typedef SkTypeface INHERITED;
+};
+
+#endif