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/*
* 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>
#include <dwrite_1.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))
{
if (!SUCCEEDED(fDWriteFontFace->QueryInterface(&fDWriteFontFace1))) {
// IUnknown::QueryInterface states that if it fails, punk will be set to NULL.
// http://blogs.msdn.com/b/oldnewthing/archive/2004/03/26/96777.aspx
SK_ALWAYSBREAK(NULL == fDWriteFontFace1.get());
}
}
public:
SkTScopedComPtr<IDWriteFactory> fFactory;
SkTScopedComPtr<IDWriteFontCollectionLoader> fDWriteFontCollectionLoader;
SkTScopedComPtr<IDWriteFontFileLoader> fDWriteFontFileLoader;
SkTScopedComPtr<IDWriteFontFamily> fDWriteFontFamily;
SkTScopedComPtr<IDWriteFont> fDWriteFont;
SkTScopedComPtr<IDWriteFontFace> fDWriteFontFace;
SkTScopedComPtr<IDWriteFontFace1> fDWriteFontFace1;
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
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