gm/verttext.cpp

   1 /*
   2  * Copyright 2011 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
   9 #include "gm.h"
  10 #include "SkCanvas.h"
  11 #include "SkTypeface.h"
  12
  13 namespace skiagm {
  14
  15 #define TEXT_SIZE   48
  16 constexpr char gText[] = "Hello";
  17
  18 //Before shaping
  19 //constexpr char gText[] = "「テスト。」";
  20 //constexpr char gText[] = {0xE3,0x80,0x8C, 0xE3,0x83,0x86, 0xE3,0x82,0xB9, 0xE3,0x83,0x88, 0xE3,0x80,0x82, 0xE3,0x80,0x8D, 0x0};
  21
  22 //After shaping
  23 //constexpr char gText[] = "﹁テスト︒﹂";
  24 //constexpr char gText[] = {0xEF,0xB9,0x81, 0xE3,0x83,0x86, 0xE3,0x82,0xB9, 0xE3,0x83,0x88, 0xEF,0xB8,0x92, 0xEF,0xB9,0x82, 0x0};
  25
  26 constexpr size_t gLen = sizeof(gText) - sizeof(gText[0]);
  27
  28 class VertTextGM : public GM {
  29 public:
  30     VertTextGM()
  31         // : fFace(SkTypeface::CreateFromName("unifont", SkTypeface::kNormal))
  32         // : fFace(SkTypeface::CreateFromFile("MotoyaL04Mincho_3.ttf"))
  33
  34         // Bitmap fonts on OS X.
  35         // : fFace(SkTypeface::CreateFromName("GB18030 Bitmap", SkTypeface::kNormal))
  36         // : fFace(SkTypeface::CreateFromName("Apple Color Emoji", SkTypeface::kNormal))
  37
  38         // OTF CFF fonts on OS X.
  39         // : fFace(SkTypeface::CreateFromName("Hiragino Mincho ProN", SkTypeface::kNormal))
  40         // : fFace(SkTypeface::CreateFromName("Hiragino Kaku Gothic Pro", SkTypeface::kNormal))
  41         // : fFace(SkTypeface::CreateFromName("Hiragino Sans GB", SkTypeface::kNormal))
  42         // : fFace(SkTypeface::CreateFromName("STIXGeneral", SkTypeface::kNormal))
  43         // : fFace(SkTypeface::CreateFromName("Yuppy SC", SkTypeface::kNormal))
  44         // : fFace(SkTypeface::CreateFromName("Yuppy TC", SkTypeface::kNormal))
  45
  46     {
  47     }
  48
  49     //sk_sp<SkTypeface> fFace;
  50
  51 protected:
  52
  53     SkString onShortName() override {
  54         return SkString("verttext");
  55     }
  56
  57     SkISize onISize() override { return SkISize::Make(640, 480); }
  58
  59     static void drawBaseline(SkCanvas* canvas, const SkPaint& paint,
  60                              SkScalar x, SkScalar y) {
  61         SkScalar total = paint.measureText(gText, gLen);
  62
  63         SkPaint p;
  64         p.setAntiAlias(true);
  65         p.setColor(0x80FF0000);
  66         canvas->drawLine(x, y,
  67                          paint.isVerticalText() ? x : x + total,
  68                          paint.isVerticalText() ? y + total : y,
  69                          p);
  70
  71         p.setColor(0xFF0000FF);
  72         SkScalar adv[gLen];
  73         int numChars = paint.getTextWidths(gText, gLen, adv, nullptr);
  74         for (int i = 0; i < numChars; ++i) {
  75             canvas->drawCircle(x, y, SK_Scalar1 * 3 / 2, p);
  76             if (paint.isVerticalText()) {
  77                 y += adv[i];
  78             } else {
  79                 x += adv[i];
  80             }
  81         }
  82         canvas->drawCircle(x, y, SK_Scalar1 * 3 / 2, p);
  83     }
  84
  85     void onDraw(SkCanvas* canvas) override {
  86         SkScalar x = SkIntToScalar(100);
  87         SkScalar y = SkIntToScalar(50);
  88
  89         for (int i = 0; i < 4; ++i) {
  90             SkPaint paint;
  91             paint.setAntiAlias(true);
  92             paint.setTextSize(SkIntToScalar(TEXT_SIZE));
  93             //paint.setTypeface(fFace);
  94             //paint.setFakeBoldText(true);
  95
  96             paint.setVerticalText(false);
  97             drawBaseline(canvas, paint, x, y);
  98             canvas->drawText(gText, gLen, x, y, paint);
  99
 100             paint.setVerticalText(true);
 101             drawBaseline(canvas, paint, x, y);
 102             canvas->drawText(gText, gLen, x, y, paint);
 103
 104             x += SkIntToScalar(40);
 105             y += SkIntToScalar(120);
 106
 107             canvas->rotate(SkIntToScalar(-15));
 108         }
 109     }
 110
 111 private:
 112     typedef GM INHERITED;
 113 };
 114
 115 ///////////////////////////////////////////////////////////////////////////////
 116
 117 static GM* MyFactory(void*) { return new VertTextGM; }
 118 static GMRegistry reg(MyFactory);
 119
 120 }