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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 #include "SampleCode.h"
      9 #include "SkView.h"
     10 #include "SkCanvas.h"
     11 #include "SkTypeface.h"
     12 #include "SkPath.h"
     13 #include "SkRegion.h"
     14 #include "SkShader.h"
     15 #include "SkUtils.h"
     16 #include "Sk1DPathEffect.h"
     17 #include "SkCornerPathEffect.h"
     18 #include "SkPathMeasure.h"
     19 #include "SkRandom.h"
     20 #include "SkColorPriv.h"
     21 #include "SkColorFilter.h"
     22 #include "SkDither.h"
     23 
     24 static const struct {
     25     const char* fName;
     26     SkTypeface::Style   fStyle;
     27 } gFaces[] = {
     28     { nullptr, SkTypeface::kNormal },
     29     { nullptr, SkTypeface::kBold },
     30     { "serif", SkTypeface::kNormal },
     31     { "serif", SkTypeface::kBold },
     32     { "serif", SkTypeface::kItalic },
     33     { "serif", SkTypeface::kBoldItalic },
     34     { "monospace", SkTypeface::kNormal }
     35 };
     36 
     37 static const int gFaceCount = SK_ARRAY_COUNT(gFaces);
     38 
     39 class FontScalerTestView : public SampleView {
     40     SkTypeface* fFaces[gFaceCount];
     41 
     42 public:
     43     FontScalerTestView() {
     44         for (int i = 0; i < gFaceCount; i++) {
     45             fFaces[i] = SkTypeface::CreateFromName(gFaces[i].fName,
     46                                                    gFaces[i].fStyle);
     47         }
     48 //        this->setBGColor(0xFFDDDDDD);
     49     }
     50 
     51     virtual ~FontScalerTestView() {
     52         for (int i = 0; i < gFaceCount; i++) {
     53             SkSafeUnref(fFaces[i]);
     54         }
     55     }
     56 
     57 protected:
     58     // overrides from SkEventSink
     59     virtual bool onQuery(SkEvent* evt) {
     60         if (SampleCode::TitleQ(*evt)) {
     61             SampleCode::TitleR(evt, "FontScaler Test");
     62             return true;
     63         }
     64         return this->INHERITED::onQuery(evt);
     65     }
     66 
     67     static void rotate_about(SkCanvas* canvas, SkScalar degrees, SkScalar px, SkScalar py) {
     68         canvas->translate(px, py);
     69         canvas->rotate(degrees);
     70         canvas->translate(-px, -py);
     71     }
     72 
     73     virtual void onDrawContent(SkCanvas* canvas) {
     74         SkPaint paint;
     75 
     76         // test handling of obscene cubic values (currently broken)
     77         if (false) {
     78             SkPoint pts[4];
     79             pts[0].set(1.61061274e+09f, 6291456);
     80             pts[1].set(-7.18397061e+15f,
     81                        -1.53091184e+13f);
     82             pts[2].set(-1.30077315e+16f,
     83                        -2.77196141e+13f);
     84             pts[3].set(-1.30077315e+16f,
     85                        -2.77196162e+13f);
     86 
     87             SkPath path;
     88             path.moveTo(pts[0]);
     89             path.cubicTo(pts[1], pts[2], pts[3]);
     90             canvas->drawPath(path, paint);
     91         }
     92 
     93 //        paint.setSubpixelText(true);
     94         paint.setAntiAlias(true);
     95         paint.setLCDRenderText(true);
     96         SkSafeUnref(paint.setTypeface(SkTypeface::CreateFromName("Times Roman", SkTypeface::kNormal)));
     97 
     98 //        const char* text = "abcdefghijklmnopqrstuvwxyz";
     99         const char* text = "Hamburgefons ooo mmm";
    100         const size_t textLen = strlen(text);
    101 
    102         for (int j = 0; j < 2; ++j) {
    103             for (int i = 0; i < 6; ++i) {
    104                 SkScalar x = SkIntToScalar(10);
    105                 SkScalar y = SkIntToScalar(20);
    106 
    107                 SkAutoCanvasRestore acr(canvas, true);
    108                 canvas->translate(SkIntToScalar(50 + i * 230),
    109                                   SkIntToScalar(20));
    110                 rotate_about(canvas, SkIntToScalar(i * 5), x, y * 10);
    111 
    112                 {
    113                     SkPaint p;
    114                     p.setAntiAlias(true);
    115                     SkRect r;
    116                     r.set(x-3, 15, x-1, 280);
    117                     canvas->drawRect(r, p);
    118                 }
    119 
    120                 int index = 0;
    121                 for (int ps = 6; ps <= 22; ps++) {
    122                     paint.setTextSize(SkIntToScalar(ps));
    123                     canvas->drawText(text, textLen, x, y, paint);
    124                     y += paint.getFontMetrics(nullptr);
    125                     index += 1;
    126                 }
    127             }
    128             canvas->translate(0, 400);
    129             paint.setSubpixelText(true);
    130         }
    131     }
    132 
    133 private:
    134     typedef SkView INHERITED;
    135 };
    136 
    137 //////////////////////////////////////////////////////////////////////////////
    138 
    139 static SkView* MyFactory() { return new FontScalerTestView; }
    140 static SkViewRegister reg(MyFactory);
    141