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      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[] = "";
     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[] = "";
     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::MakeFromName("unifont", SkFontStyle::Normal()))
     32         // : fFace(SkTypeface::MakeFromFile("MotoyaL04Mincho_3.ttf"))
     33 
     34         // Bitmap fonts on OS X.
     35         // : fFace(SkTypeface::MakeFromName("GB18030 Bitmap", SkFontStyle::Normal()))
     36         // : fFace(SkTypeface::MakeFromName("Apple Color Emoji", SkFontStyle::Normal()))
     37 
     38         // OTF CFF fonts on OS X.
     39         // : fFace(SkTypeface::MakeFromName("Hiragino Mincho ProN", SkFontStyle::Normal()))
     40         // : fFace(SkTypeface::MakeFromName("Hiragino Kaku Gothic Pro", SkFontStyle::Normal()))
     41         // : fFace(SkTypeface::MakeFromName("Hiragino Sans GB", SkFontStyle::Normal()))
     42         // : fFace(SkTypeface::MakeFromName("STIXGeneral", SkFontStyle::Normal()))
     43         // : fFace(SkTypeface::MakeFromName("Yuppy SC", SkFontStyle::Normal()))
     44         // : fFace(SkTypeface::MakeFromName("Yuppy TC", SkFontStyle::Normal()))
     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 }
    121