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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 "Sk64.h"
     12 #include "SkGradientShader.h"
     13 #include "SkGraphics.h"
     14 #include "SkImageDecoder.h"
     15 #include "SkKernel33MaskFilter.h"
     16 #include "SkPath.h"
     17 #include "SkRandom.h"
     18 #include "SkRegion.h"
     19 #include "SkShader.h"
     20 #include "SkUtils.h"
     21 #include "SkColorPriv.h"
     22 #include "SkColorFilter.h"
     23 #include "SkTime.h"
     24 #include "SkTypeface.h"
     25 #include "SkXfermode.h"
     26 
     27 static void lettersToBitmap(SkBitmap* dst, const char chars[],
     28                             const SkPaint& original, SkBitmap::Config config) {
     29     SkPath path;
     30     SkScalar x = 0;
     31     SkScalar width;
     32     SkPath p;
     33     for (size_t i = 0; i < strlen(chars); i++) {
     34         original.getTextPath(&chars[i], 1, x, 0, &p);
     35         path.addPath(p);
     36         original.getTextWidths(&chars[i], 1, &width);
     37         x += width;
     38     }
     39     SkRect bounds = path.getBounds();
     40     SkScalar sw = -original.getStrokeWidth();
     41     bounds.inset(sw, sw);
     42     path.offset(-bounds.fLeft, -bounds.fTop);
     43     bounds.offset(-bounds.fLeft, -bounds.fTop);
     44 
     45     int w = SkScalarRound(bounds.width());
     46     int h = SkScalarRound(bounds.height());
     47     SkPaint paint(original);
     48     SkBitmap src;
     49     src.setConfig(config, w, h);
     50     src.allocPixels();
     51     src.eraseColor(0);
     52     {
     53         SkCanvas canvas(src);
     54         paint.setAntiAlias(true);
     55         paint.setColor(SK_ColorBLACK);
     56         paint.setStyle(SkPaint::kFill_Style);
     57         canvas.drawPath(path, paint);
     58     }
     59 
     60     dst->setConfig(config, w, h);
     61     dst->allocPixels();
     62     dst->eraseColor(SK_ColorWHITE);
     63     {
     64         SkCanvas canvas(*dst);
     65         paint.setXfermodeMode(SkXfermode::kDstATop_Mode);
     66         canvas.drawBitmap(src, 0, 0, &paint);
     67         paint.setColor(original.getColor());
     68         paint.setStyle(SkPaint::kStroke_Style);
     69         canvas.drawPath(path, paint);
     70     }
     71 }
     72 
     73 static void lettersToBitmap2(SkBitmap* dst, const char chars[],
     74                             const SkPaint& original, SkBitmap::Config config) {
     75     SkPath path;
     76     SkScalar x = 0;
     77     SkScalar width;
     78     SkPath p;
     79     for (size_t i = 0; i < strlen(chars); i++) {
     80         original.getTextPath(&chars[i], 1, x, 0, &p);
     81         path.addPath(p);
     82         original.getTextWidths(&chars[i], 1, &width);
     83         x += width;
     84     }
     85     SkRect bounds = path.getBounds();
     86     SkScalar sw = -original.getStrokeWidth();
     87     bounds.inset(sw, sw);
     88     path.offset(-bounds.fLeft, -bounds.fTop);
     89     bounds.offset(-bounds.fLeft, -bounds.fTop);
     90 
     91     int w = SkScalarRound(bounds.width());
     92     int h = SkScalarRound(bounds.height());
     93     SkPaint paint(original);
     94 
     95     paint.setAntiAlias(true);
     96     paint.setXfermodeMode(SkXfermode::kDstATop_Mode);
     97     paint.setColor(original.getColor());
     98     paint.setStyle(SkPaint::kStroke_Style);
     99 
    100     dst->setConfig(config, w, h);
    101     dst->allocPixels();
    102     dst->eraseColor(SK_ColorWHITE);
    103 
    104     SkCanvas canvas(*dst);
    105     canvas.drawPath(path, paint);
    106 }
    107 
    108 class StrokeTextView : public SampleView {
    109     bool fAA;
    110 public:
    111 	StrokeTextView() : fAA(false) {
    112         this->setBGColor(0xFFCC8844);
    113     }
    114 
    115 protected:
    116     // overrides from SkEventSink
    117     virtual bool onQuery(SkEvent* evt) {
    118         if (SampleCode::TitleQ(*evt)) {
    119             SampleCode::TitleR(evt, "StrokeText");
    120             return true;
    121         }
    122         return this->INHERITED::onQuery(evt);
    123     }
    124 
    125     virtual void onDrawContent(SkCanvas* canvas) {
    126         SkBitmap bm;
    127         SkPaint paint;
    128 
    129         paint.setStrokeWidth(SkIntToScalar(6));
    130         paint.setTextSize(SkIntToScalar(80));
    131 //        paint.setTypeface(Typeface.DEFAULT_BOLD);
    132 
    133         lettersToBitmap(&bm, "Test Case", paint, SkBitmap::kARGB_4444_Config);
    134 
    135         canvas->drawBitmap(bm, 0, 0);
    136     }
    137 
    138 private:
    139 
    140     typedef SampleView INHERITED;
    141 };
    142 
    143 //////////////////////////////////////////////////////////////////////////////
    144 
    145 static SkView* MyFactory() { return new StrokeTextView; }
    146 static SkViewRegister reg(MyFactory);
    147 
    148