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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 #include "SampleCode.h"
      8 #include "Sk1DPathEffect.h"
      9 #include "SkCanvas.h"
     10 #include "SkColorFilter.h"
     11 #include "SkColorPriv.h"
     12 #include "SkCornerPathEffect.h"
     13 #include "SkDither.h"
     14 #include "SkFontStyle.h"
     15 #include "SkPath.h"
     16 #include "SkPathMeasure.h"
     17 #include "SkRandom.h"
     18 #include "SkRegion.h"
     19 #include "SkShader.h"
     20 #include "SkTypeface.h"
     21 #include "SkUtils.h"
     22 #include "SkView.h"
     23 
     24 static constexpr struct {
     25     const char* fName;
     26     SkFontStyle fStyle;
     27 } gFaces[] = {
     28     { nullptr, SkFontStyle::Normal() },
     29     { nullptr, SkFontStyle::Bold() },
     30     { "serif", SkFontStyle::Normal() },
     31     { "serif", SkFontStyle::Bold() },
     32     { "serif", SkFontStyle::Italic() },
     33     { "serif", SkFontStyle::BoldItalic() },
     34     { "monospace", SkFontStyle::Normal() }
     35 };
     36 
     37 static const int gFaceCount = SK_ARRAY_COUNT(gFaces);
     38 
     39 class FontScalerTestView : public SampleView {
     40     sk_sp<SkTypeface> fFaces[gFaceCount];
     41 
     42 public:
     43     FontScalerTestView() {
     44         for (int i = 0; i < gFaceCount; i++) {
     45             fFaces[i] = SkTypeface::MakeFromName(gFaces[i].fName, gFaces[i].fStyle);
     46         }
     47     }
     48 
     49 protected:
     50     // overrides from SkEventSink
     51     virtual bool onQuery(SkEvent* evt) {
     52         if (SampleCode::TitleQ(*evt)) {
     53             SampleCode::TitleR(evt, "FontScaler Test");
     54             return true;
     55         }
     56         return this->INHERITED::onQuery(evt);
     57     }
     58 
     59     virtual void onDrawContent(SkCanvas* canvas) {
     60         SkPaint paint;
     61 
     62         // test handling of obscene cubic values (currently broken)
     63         if (false) {
     64             SkPoint pts[4];
     65             pts[0].set(1.61061274e+09f, 6291456);
     66             pts[1].set(-7.18397061e+15f,
     67                        -1.53091184e+13f);
     68             pts[2].set(-1.30077315e+16f,
     69                        -2.77196141e+13f);
     70             pts[3].set(-1.30077315e+16f,
     71                        -2.77196162e+13f);
     72 
     73             SkPath path;
     74             path.moveTo(pts[0]);
     75             path.cubicTo(pts[1], pts[2], pts[3]);
     76             canvas->drawPath(path, paint);
     77         }
     78 
     79 //        paint.setSubpixelText(true);
     80         paint.setAntiAlias(true);
     81         paint.setLCDRenderText(true);
     82         paint.setTypeface(SkTypeface::MakeFromName("Times Roman", SkFontStyle()));
     83 
     84 //        const char* text = "abcdefghijklmnopqrstuvwxyz";
     85         const char* text = "Hamburgefons ooo mmm";
     86         const size_t textLen = strlen(text);
     87 
     88         for (int j = 0; j < 2; ++j) {
     89             for (int i = 0; i < 6; ++i) {
     90                 SkScalar x = SkIntToScalar(10);
     91                 SkScalar y = SkIntToScalar(20);
     92 
     93                 SkAutoCanvasRestore acr(canvas, true);
     94                 canvas->translate(SkIntToScalar(50 + i * 230),
     95                                   SkIntToScalar(20));
     96                 canvas->rotate(SkIntToScalar(i * 5), x, y * 10);
     97 
     98                 {
     99                     SkPaint p;
    100                     p.setAntiAlias(true);
    101                     SkRect r;
    102                     r.set(x-3, 15, x-1, 280);
    103                     canvas->drawRect(r, p);
    104                 }
    105 
    106                 int index = 0;
    107                 for (int ps = 6; ps <= 22; ps++) {
    108                     paint.setTextSize(SkIntToScalar(ps));
    109                     canvas->drawText(text, textLen, x, y, paint);
    110                     y += paint.getFontMetrics(nullptr);
    111                     index += 1;
    112                 }
    113             }
    114             canvas->translate(0, 400);
    115             paint.setSubpixelText(true);
    116         }
    117     }
    118 
    119 private:
    120     typedef SkView INHERITED;
    121 };
    122 
    123 //////////////////////////////////////////////////////////////////////////////
    124 
    125 static SkView* MyFactory() { return new FontScalerTestView; }
    126 static SkViewRegister reg(MyFactory);
    127