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 #include "include/utils/SkTextUtils.h"
9
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkFont.h"
12 #include "include/core/SkMatrix.h"
13 #include "include/core/SkPath.h"
14 #include "include/core/SkPoint.h"
15 #include "include/core/SkScalar.h"
16 #include "include/core/SkTextBlob.h"
17 #include "include/private/base/SkTemplates.h"
18 #include "src/core/SkFontPriv.h"
19
20 using namespace skia_private;
21
22 class SkPaint;
23
Draw(SkCanvas * canvas,const void * text,size_t size,SkTextEncoding encoding,SkScalar x,SkScalar y,const SkFont & font,const SkPaint & paint,Align align)24 void SkTextUtils::Draw(SkCanvas* canvas, const void* text, size_t size, SkTextEncoding encoding,
25 SkScalar x, SkScalar y, const SkFont& font, const SkPaint& paint,
26 Align align) {
27 if (align != kLeft_Align) {
28 SkScalar width = font.measureText(text, size, encoding);
29 if (align == kCenter_Align) {
30 width *= 0.5f;
31 }
32 x -= width;
33 }
34
35 canvas->drawTextBlob(SkTextBlob::MakeFromText(text, size, font, encoding), x, y, paint);
36 }
37
GetPath(const void * text,size_t length,SkTextEncoding encoding,SkScalar x,SkScalar y,const SkFont & font,SkPath * path)38 void SkTextUtils::GetPath(const void* text, size_t length, SkTextEncoding encoding,
39 SkScalar x, SkScalar y, const SkFont& font, SkPath* path) {
40 SkAutoToGlyphs ag(font, text, length, encoding);
41 AutoTArray<SkPoint> pos(ag.count());
42 font.getPos(ag.glyphs(), ag.count(), pos.get(), {x, y});
43
44 struct Rec {
45 SkPath* fDst;
46 const SkPoint* fPos;
47 } rec = { path, pos.get() };
48
49 path->reset();
50 font.getPaths(ag.glyphs(), ag.count(), [](const SkPath* src, const SkMatrix& mx, void* ctx) {
51 Rec* rec = (Rec*)ctx;
52 if (src) {
53 SkMatrix m(mx);
54 m.postTranslate(rec->fPos->fX, rec->fPos->fY);
55 rec->fDst->addPath(*src, m);
56 }
57 rec->fPos += 1;
58 }, &rec);
59 }
60
61