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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     { NULL, SkTypeface::kNormal },
     29     { NULL, 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, -1.53091184e+13f);
     81             pts[2].set(-1.30077315e+16f, -2.77196141e+13f);
     82             pts[3].set(-1.30077315e+16f, -2.77196162e+13f);
     83 
     84             SkPath path;
     85             path.moveTo(pts[0]);
     86             path.cubicTo(pts[1], pts[2], pts[3]);
     87             canvas->drawPath(path, paint);
     88         }
     89 
     90 //        paint.setSubpixelText(true);
     91         paint.setAntiAlias(true);
     92         paint.setLCDRenderText(true);
     93         SkSafeUnref(paint.setTypeface(SkTypeface::CreateFromName("Times Roman", SkTypeface::kNormal)));
     94 
     95 //        const char* text = "abcdefghijklmnopqrstuvwxyz";
     96         const char* text = "Hamburgefons ooo mmm";
     97         const size_t textLen = strlen(text);
     98 
     99         for (int j = 0; j < 2; ++j) {
    100             for (int i = 0; i < 6; ++i) {
    101                 SkScalar x = SkIntToScalar(10);
    102                 SkScalar y = SkIntToScalar(20);
    103 
    104                 SkAutoCanvasRestore acr(canvas, true);
    105                 canvas->translate(SkIntToScalar(50 + i * 230),
    106                                   SkIntToScalar(20));
    107                 rotate_about(canvas, i * 5, x, y * 10);
    108 
    109                 {
    110                     SkPaint p;
    111                     p.setAntiAlias(true);
    112                     SkRect r;
    113                     r.set(x-3, 15, x-1, 280);
    114                     canvas->drawRect(r, p);
    115                 }
    116 
    117                 int index = 0;
    118                 for (int ps = 6; ps <= 22; ps++) {
    119                     paint.setTextSize(SkIntToScalar(ps));
    120                     canvas->drawText(text, textLen, x, y, paint);
    121                     y += paint.getFontMetrics(NULL);
    122                     index += 1;
    123                 }
    124             }
    125             canvas->translate(0, 400);
    126             paint.setSubpixelText(true);
    127         }
    128     }
    129 
    130 private:
    131     typedef SkView INHERITED;
    132 };
    133 
    134 //////////////////////////////////////////////////////////////////////////////
    135 
    136 static SkView* MyFactory() { return new FontScalerTestView; }
    137 static SkViewRegister reg(MyFactory);
    138 
    139