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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 "SkBlurMask.h"
     10 #include "SkBlurMaskFilter.h"
     11 #include "SkCanvas.h"
     12 #include "SkColorMatrixFilter.h"
     13 #include "SkDiscretePathEffect.h"
     14 #include "SkGradientShader.h"
     15 #include "SkPaint.h"
     16 #include "SkView.h"
     17 
     18 
     19 //#define COLOR 0xFFFF8844
     20 #define COLOR 0xFF888888
     21 
     22 static void paint_proc0(SkPaint*) {
     23 }
     24 
     25 static void paint_proc1(SkPaint* paint) {
     26     paint->setMaskFilter(SkBlurMaskFilter::Create(
     27                                 kNormal_SkBlurStyle,
     28                                 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(2))))->unref();
     29 }
     30 
     31 static void paint_proc2(SkPaint* paint) {
     32     SkScalar dir[3] = { 1, 1, 1};
     33     paint->setMaskFilter(
     34             SkBlurMaskFilter::CreateEmboss(SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)),
     35                                            dir,
     36                                            0.1f,
     37                                            0.05f))->unref();
     38 }
     39 
     40 static void paint_proc3(SkPaint* paint) {
     41     SkColor colors[] = { SK_ColorRED, COLOR, SK_ColorBLUE };
     42     SkPoint pts[] = { { 3, 0 }, { 7, 5 } };
     43     paint->setShader(SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors),
     44                                         SkShader::kMirror_TileMode))->unref();
     45 }
     46 
     47 static void paint_proc5(SkPaint* paint) {
     48     paint_proc3(paint);
     49     paint_proc2(paint);
     50 }
     51 
     52 typedef void (*PaintProc)(SkPaint*);
     53 const PaintProc gPaintProcs[] = {
     54     paint_proc0,
     55     paint_proc1,
     56     paint_proc2,
     57     paint_proc3,
     58     paint_proc5,
     59 };
     60 
     61 ///////////////////////////////////////////////////////////////////////////////
     62 
     63 class EffectsView : public SampleView {
     64 public:
     65     SkPath fPath;
     66     SkPaint fPaint[SK_ARRAY_COUNT(gPaintProcs)];
     67 
     68     EffectsView() {
     69         size_t i;
     70         const float pts[] = {
     71             0, 0,
     72             10, 0,
     73             10, 5,
     74             20, -5,
     75             10, -15,
     76             10, -10,
     77             0, -10
     78         };
     79         fPath.moveTo(pts[0], pts[1]);
     80         for (i = 2; i < SK_ARRAY_COUNT(pts); i += 2) {
     81             fPath.lineTo(pts[i], pts[i+1]);
     82         }
     83 
     84         for (i = 0; i < SK_ARRAY_COUNT(gPaintProcs); i++) {
     85             fPaint[i].setAntiAlias(true);
     86             fPaint[i].setColor(COLOR);
     87             gPaintProcs[i](&fPaint[i]);
     88         }
     89 
     90         SkColorMatrix cm;
     91         cm.setRotate(SkColorMatrix::kG_Axis, 180);
     92         cm.setIdentity();
     93 
     94         this->setBGColor(0xFFDDDDDD);
     95     }
     96 
     97 protected:
     98     // overrides from SkEventSink
     99     virtual bool onQuery(SkEvent* evt) {
    100         if (SampleCode::TitleQ(*evt)) {
    101             SampleCode::TitleR(evt, "Effects");
    102             return true;
    103         }
    104         return this->INHERITED::onQuery(evt);
    105     }
    106 
    107     virtual void onDrawContent(SkCanvas* canvas) {
    108         canvas->scale(3, 3);
    109         canvas->translate(10, 30);
    110         for (size_t i = 0; i < SK_ARRAY_COUNT(fPaint); i++) {
    111             canvas->drawPath(fPath, fPaint[i]);
    112             canvas->translate(32, 0);
    113         }
    114     }
    115 
    116 private:
    117     typedef SampleView INHERITED;
    118 };
    119 
    120 ///////////////////////////////////////////////////////////////////////////////
    121 
    122 static SkView* MyFactory() { return new EffectsView; }
    123 static SkViewRegister reg(MyFactory);
    124