1 /*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #ifndef SkTypeface_win_dw_DEFINED
9 #define SkTypeface_win_dw_DEFINED
10
11 #include "include/core/SkFontArguments.h"
12 #include "include/core/SkTypeface.h"
13 #include "src/base/SkLeanWindows.h"
14 #include "src/core/SkAdvancedTypefaceMetrics.h"
15 #include "src/core/SkTypefaceCache.h"
16 #include "src/utils/win/SkDWrite.h"
17 #include "src/utils/win/SkHRESULT.h"
18 #include "src/utils/win/SkTScopedComPtr.h"
19
20 #include <dwrite.h>
21 #include <dwrite_1.h>
22 #include <dwrite_2.h>
23 #include <dwrite_3.h>
24
25 class SkFontDescriptor;
26 struct SkScalerContextRec;
27
28 /* dwrite_3.h incorrectly uses NTDDI_VERSION to hide immutible interfaces (it should only be used to
29 gate changes to public ABI). The implementation files can (and must) get away with including
30 SkDWriteNTDDI_VERSION.h which simply unsets NTDDI_VERSION, but this doesn't work well for this
31 header which can be included in SkTypeface.cpp. Instead, ensure that any declarations hidden
32 behind the NTDDI_VERSION are forward (backward?) declared here in case dwrite_3.h did not declare
33 them. */
34 interface IDWriteFontFace4;
35
get_style(IDWriteFont * font)36 static SkFontStyle get_style(IDWriteFont* font) {
37 int weight = font->GetWeight();
38 int width = font->GetStretch();
39 SkFontStyle::Slant slant = SkFontStyle::kUpright_Slant;
40 switch (font->GetStyle()) {
41 case DWRITE_FONT_STYLE_NORMAL: slant = SkFontStyle::kUpright_Slant; break;
42 case DWRITE_FONT_STYLE_OBLIQUE: slant = SkFontStyle::kOblique_Slant; break;
43 case DWRITE_FONT_STYLE_ITALIC: slant = SkFontStyle::kItalic_Slant; break;
44 default: SkASSERT(false); break;
45 }
46 return SkFontStyle(weight, width, slant);
47 }
48
49 class DWriteFontTypeface : public SkTypeface {
50 public:
51 struct Loaders : public SkNVRefCnt<Loaders> {
LoadersLoaders52 Loaders(IDWriteFactory* factory,
53 IDWriteFontFileLoader* fontFileLoader,
54 IDWriteFontCollectionLoader* fontCollectionLoader)
55 : fFactory(SkRefComPtr(factory))
56 , fDWriteFontFileLoader(SkRefComPtr(fontFileLoader))
57 , fDWriteFontCollectionLoader(SkRefComPtr(fontCollectionLoader))
58 {}
59 Loaders(const Loaders&) = delete;
60 Loaders& operator=(const Loaders&) = delete;
61 Loaders(Loaders&&) = delete;
62 Loaders& operator=(Loaders&&) = delete;
63 ~Loaders();
64
65 SkTScopedComPtr<IDWriteFactory> fFactory;
66 SkTScopedComPtr<IDWriteFontFileLoader> fDWriteFontFileLoader;
67 SkTScopedComPtr<IDWriteFontCollectionLoader> fDWriteFontCollectionLoader;
68 };
69
70 static constexpr SkTypeface::FactoryId FactoryId = SkSetFourByteTag('d','w','r','t');
71 static sk_sp<SkTypeface> MakeFromStream(std::unique_ptr<SkStreamAsset>, const SkFontArguments&);
72
73 ~DWriteFontTypeface() override;
74 private:
75 DWriteFontTypeface(const SkFontStyle& style,
76 IDWriteFactory* factory,
77 IDWriteFontFace* fontFace,
78 IDWriteFont* font,
79 IDWriteFontFamily* fontFamily,
80 sk_sp<Loaders> loaders,
81 const SkFontArguments::Palette&);
82 HRESULT initializePalette();
83
84 public:
85 SkTScopedComPtr<IDWriteFactory> fFactory;
86 SkTScopedComPtr<IDWriteFactory2> fFactory2;
87 SkTScopedComPtr<IDWriteFontFamily> fDWriteFontFamily;
88 SkTScopedComPtr<IDWriteFont> fDWriteFont;
89 SkTScopedComPtr<IDWriteFontFace> fDWriteFontFace;
90 SkTScopedComPtr<IDWriteFontFace1> fDWriteFontFace1;
91 SkTScopedComPtr<IDWriteFontFace2> fDWriteFontFace2;
92 SkTScopedComPtr<IDWriteFontFace4> fDWriteFontFace4;
93 bool fIsColorFont;
94
95 std::unique_ptr<SkFontArguments::Palette::Override> fRequestedPaletteEntryOverrides;
96 SkFontArguments::Palette fRequestedPalette;
97
98 size_t fPaletteEntryCount;
99 std::unique_ptr<SkColor[]> fPalette;
100
Make(IDWriteFactory * factory,IDWriteFontFace * fontFace,IDWriteFont * font,IDWriteFontFamily * fontFamily,sk_sp<Loaders> loaders,const SkFontArguments::Palette & palette)101 static sk_sp<DWriteFontTypeface> Make(
102 IDWriteFactory* factory,
103 IDWriteFontFace* fontFace,
104 IDWriteFont* font,
105 IDWriteFontFamily* fontFamily,
106 sk_sp<Loaders> loaders,
107 const SkFontArguments::Palette& palette)
108 {
109 return sk_sp<DWriteFontTypeface>(new DWriteFontTypeface(
110 get_style(font), factory, fontFace, font, fontFamily, std::move(loaders), palette));
111 }
112
113 protected:
weak_dispose()114 void weak_dispose() const override {
115 fLoaders.reset();
116
117 //SkTypefaceCache::Remove(this);
118 INHERITED::weak_dispose();
119 }
120
121 sk_sp<SkTypeface> onMakeClone(const SkFontArguments&) const override;
122 std::unique_ptr<SkStreamAsset> onOpenStream(int* ttcIndex) const override;
123 std::unique_ptr<SkScalerContext> onCreateScalerContext(const SkScalerContextEffects&,
124 const SkDescriptor*) const override;
125 void onFilterRec(SkScalerContextRec*) const override;
126 void getGlyphToUnicodeMap(SkUnichar* glyphToUnicode) const override;
127 std::unique_ptr<SkAdvancedTypefaceMetrics> onGetAdvancedMetrics() const override;
128 void onGetFontDescriptor(SkFontDescriptor*, bool*) const override;
129 void onCharsToGlyphs(const SkUnichar* chars, int count, SkGlyphID glyphs[]) const override;
130 int onCountGlyphs() const override;
131 void getPostScriptGlyphNames(SkString*) const override;
132 int onGetUPEM() const override;
133 void onGetFamilyName(SkString* familyName) const override;
134 bool onGetPostScriptName(SkString*) const override;
135 SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override;
136 bool onGlyphMaskNeedsCurrentColor() const override;
137 int onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[],
138 int coordinateCount) const override;
139 int onGetVariationDesignParameters(SkFontParameters::Variation::Axis parameters[],
140 int parameterCount) const override;
141 int onGetTableTags(SkFontTableTag tags[]) const override;
142 size_t onGetTableData(SkFontTableTag, size_t offset, size_t length, void* data) const override;
143 sk_sp<SkData> onCopyTableData(SkFontTableTag) const override;
144
145 private:
146 mutable sk_sp<Loaders> fLoaders;
147 using INHERITED = SkTypeface;
148 };
149
150 #endif
151