1/*
2 * Copyright 2017 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#include "DMFontMgr.h"
9#include "SkFontDescriptor.h"
10#include "sk_tool_utils.h"
11
12namespace {
13
14static constexpr const char* kFamilyNames[] = {
15    "Toy Liberation Sans",
16    "Toy Liberation Serif",
17    "Toy Liberation Mono",
18};
19
20class FontStyleSet final : public SkFontStyleSet {
21public:
22    explicit FontStyleSet(int familyIndex) {
23        using sk_tool_utils::create_portable_typeface;
24        const char* familyName = kFamilyNames[familyIndex];
25
26        fTypefaces[0] = create_portable_typeface(familyName, SkFontStyle::Normal());
27        fTypefaces[1] = create_portable_typeface(familyName, SkFontStyle::Bold());
28        fTypefaces[2] = create_portable_typeface(familyName, SkFontStyle::Italic());
29        fTypefaces[3] = create_portable_typeface(familyName, SkFontStyle::BoldItalic());
30    }
31
32    int count() override { return 4; }
33
34    void getStyle(int index, SkFontStyle* style, SkString* name) override {
35        switch (index) {
36            default:
37            case  0: if (style) { *style = SkFontStyle::Normal(); }
38                     if (name)  { *name = "Normal"; }
39                     break;
40            case  1: if (style) { *style = SkFontStyle::Bold(); }
41                     if (name)  { *name = "Bold"; }
42                     break;
43            case  2: if (style) { *style = SkFontStyle::Italic(); }
44                     if (name)  { *name = "Italic"; }
45                     break;
46            case  3: if (style) { *style = SkFontStyle::BoldItalic(); }
47                     if (name)  { *name = "BoldItalic"; }
48                     break;
49        }
50    }
51
52    SkTypeface* createTypeface(int index) override {
53        return SkRef(fTypefaces[index].get());
54    }
55
56    SkTypeface* matchStyle(const SkFontStyle& pattern) override {
57        return this->matchStyleCSS3(pattern);
58    }
59
60private:
61    sk_sp<SkTypeface> fTypefaces[4];
62};
63
64// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ //
65
66class FontMgr final : public SkFontMgr {
67public:
68    FontMgr() {
69        fFamilies[0] = sk_make_sp<FontStyleSet>(0);
70        fFamilies[1] = sk_make_sp<FontStyleSet>(1);
71        fFamilies[2] = sk_make_sp<FontStyleSet>(2);
72    }
73
74    int onCountFamilies() const override { return SK_ARRAY_COUNT(fFamilies); }
75
76    void onGetFamilyName(int index, SkString* familyName) const override {
77        *familyName = kFamilyNames[index];
78    }
79
80    SkFontStyleSet* onCreateStyleSet(int index) const override {
81        return SkRef(fFamilies[index].get());
82    }
83
84    SkFontStyleSet* onMatchFamily(const char familyName[]) const override {
85        if (familyName) {
86            if (strstr(familyName,  "ans")) { return this->createStyleSet(0); }
87            if (strstr(familyName, "erif")) { return this->createStyleSet(1); }
88            if (strstr(familyName,  "ono")) { return this->createStyleSet(2); }
89        }
90        return this->createStyleSet(0);
91    }
92
93
94    SkTypeface* onMatchFamilyStyle(const char familyName[],
95                                   const SkFontStyle& style) const override {
96        sk_sp<SkFontStyleSet> styleSet(this->matchFamily(familyName));
97        return styleSet->matchStyle(style);
98    }
99
100    SkTypeface* onMatchFamilyStyleCharacter(const char familyName[],
101                                            const SkFontStyle& style,
102                                            const char* bcp47[], int bcp47Count,
103                                            SkUnichar character) const override {
104        (void)bcp47;
105        (void)bcp47Count;
106        (void)character;
107        return this->matchFamilyStyle(familyName, style);
108    }
109
110    SkTypeface* onMatchFaceStyle(const SkTypeface* tf,
111                                 const SkFontStyle& style) const override {
112        SkString familyName;
113        tf->getFamilyName(&familyName);
114        return this->matchFamilyStyle(familyName.c_str(), style);
115    }
116
117    sk_sp<SkTypeface> onMakeFromData(sk_sp<SkData>, int ttcIndex) const override {
118        return nullptr;
119    }
120    sk_sp<SkTypeface> onMakeFromStreamIndex(std::unique_ptr<SkStreamAsset>,
121                                            int ttcIndex) const override {
122        return nullptr;
123    }
124    sk_sp<SkTypeface> onMakeFromStreamArgs(std::unique_ptr<SkStreamAsset>,
125                                           const SkFontArguments&) const override {
126        return nullptr;
127    }
128    sk_sp<SkTypeface> onMakeFromFontData(std::unique_ptr<SkFontData>) const override {
129        return nullptr;
130    }
131    sk_sp<SkTypeface> onMakeFromFile(const char path[], int ttcIndex) const override {
132        return nullptr;
133    }
134
135    sk_sp<SkTypeface> onLegacyMakeTypeface(const char familyName[],
136                                           SkFontStyle style) const override {
137        return sk_sp<SkTypeface>(this->matchFamilyStyle(familyName, style));
138    }
139
140private:
141    sk_sp<FontStyleSet> fFamilies[3];
142};
143}
144
145namespace DM {
146sk_sp<SkFontMgr> MakeFontMgr() { return sk_make_sp<FontMgr>(); }
147} // namespace DM
148