1 | /* |
2 | * Copyright 2018 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 SkSGText_DEFINED |
9 | #define SkSGText_DEFINED |
10 | |
11 | #include "modules/sksg/include/SkSGGeometryNode.h" |
12 | |
13 | #include "include/core/SkFont.h" |
14 | #include "include/core/SkPoint.h" |
15 | #include "include/core/SkString.h" |
16 | #include "include/core/SkTextBlob.h" |
17 | #include "include/utils/SkTextUtils.h" |
18 | |
19 | class SkCanvas; |
20 | class SkPaint; |
21 | class SkTypeface; |
22 | |
23 | namespace sksg { |
24 | |
25 | /** |
26 | * Concrete Geometry node, wrapping a (shaped) SkTextBlob. |
27 | */ |
28 | class Text final : public GeometryNode { |
29 | public: |
30 | static sk_sp<Text> Make(sk_sp<SkTypeface> tf, const SkString& text); |
31 | ~Text() override; |
32 | |
33 | SG_ATTRIBUTE(Typeface, sk_sp<SkTypeface> , fTypeface) |
34 | SG_ATTRIBUTE(Text , SkString , fText ) |
35 | SG_ATTRIBUTE(Position, SkPoint , fPosition) |
36 | SG_ATTRIBUTE(Size , SkScalar , fSize ) |
37 | SG_ATTRIBUTE(ScaleX , SkScalar , fScaleX ) |
38 | SG_ATTRIBUTE(SkewX , SkScalar , fSkewX ) |
39 | SG_ATTRIBUTE(Align , SkTextUtils::Align, fAlign ) |
40 | SG_ATTRIBUTE(Edging , SkFont::Edging , fEdging ) |
41 | SG_ATTRIBUTE(Hinting , SkFontHinting , fHinting ) |
42 | |
43 | // TODO: add shaping functionality. |
44 | |
45 | protected: |
46 | void onClip(SkCanvas*, bool antiAlias) const override; |
47 | void onDraw(SkCanvas*, const SkPaint&) const override; |
48 | bool onContains(const SkPoint&) const override; |
49 | |
50 | SkRect onRevalidate(InvalidationController*, const SkMatrix&) override; |
51 | SkPath onAsPath() const override; |
52 | |
53 | private: |
54 | Text(sk_sp<SkTypeface>, const SkString&); |
55 | |
56 | SkPoint alignedPosition(SkScalar advance) const; |
57 | |
58 | sk_sp<SkTypeface> fTypeface; |
59 | SkString fText; |
60 | SkPoint fPosition = SkPoint::Make(0, 0); |
61 | SkScalar fSize = 12; |
62 | SkScalar fScaleX = 1; |
63 | SkScalar fSkewX = 0; |
64 | SkTextUtils::Align fAlign = SkTextUtils::kLeft_Align; |
65 | SkFont::Edging fEdging = SkFont::Edging::kAntiAlias; |
66 | SkFontHinting fHinting = SkFontHinting::kNormal; |
67 | |
68 | sk_sp<SkTextBlob> fBlob; // cached text blob |
69 | |
70 | using INHERITED = GeometryNode; |
71 | }; |
72 | |
73 | /** |
74 | * Concrete Geometry node, wrapping an external SkTextBlob. |
75 | */ |
76 | class TextBlob final : public GeometryNode { |
77 | public: |
78 | static sk_sp<TextBlob> Make(sk_sp<SkTextBlob> = nullptr); |
79 | ~TextBlob() override; |
80 | |
81 | SG_ATTRIBUTE(Blob , sk_sp<SkTextBlob>, fBlob ) |
82 | SG_ATTRIBUTE(Position, SkPoint , fPosition) |
83 | |
84 | protected: |
85 | void onClip(SkCanvas*, bool antiAlias) const override; |
86 | void onDraw(SkCanvas*, const SkPaint&) const override; |
87 | bool onContains(const SkPoint&) const override; |
88 | |
89 | SkRect onRevalidate(InvalidationController*, const SkMatrix&) override; |
90 | SkPath onAsPath() const override; |
91 | |
92 | private: |
93 | explicit TextBlob(sk_sp<SkTextBlob>); |
94 | |
95 | sk_sp<SkTextBlob> fBlob; |
96 | SkPoint fPosition = SkPoint::Make(0, 0); |
97 | |
98 | using INHERITED = GeometryNode; |
99 | }; |
100 | } // namespace sksg |
101 | |
102 | #endif // SkSGText_DEFINED |
103 | |