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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 "SkCanvas.h"
     10 #include "SkPaint.h"
     11 #include "SkView.h"
     12 
     13 #include "SkBlurMaskFilter.h"
     14 #include "SkColorMatrixFilter.h"
     15 #include "SkDiscretePathEffect.h"
     16 #include "SkGradientShader.h"
     17 
     18 #include "SkEdgeClipper.h"
     19 
     20 static void test_edgeclipper() {
     21     SkPoint pts[] = {
     22         { -8.38822452e+21f, -7.69721471e+19f },
     23         { 1.57645875e+23f, 1.44634003e+21f },
     24         { 1.61519691e+23f, 1.48208059e+21f },
     25         { 3.13963584e+23f, 2.88057438e+21f }
     26     };
     27     SkRect clip = { 0, 0, 300, 200 };
     28 
     29     SkEdgeClipper clipper;
     30     clipper.clipCubic(pts, clip);
     31 }
     32 
     33 ///////////
     34 
     35 //#define COLOR 0xFFFF8844
     36 #define COLOR 0xFF888888
     37 
     38 static void paint_proc0(SkPaint* paint) {
     39 }
     40 
     41 static void paint_proc1(SkPaint* paint) {
     42     paint->setMaskFilter(SkBlurMaskFilter::Create(2,
     43                                 SkBlurMaskFilter::kNormal_BlurStyle))->unref();
     44 }
     45 
     46 static void paint_proc2(SkPaint* paint) {
     47     SkScalar dir[3] = { 1, 1, 1};
     48     paint->setMaskFilter(
     49                      SkBlurMaskFilter::CreateEmboss(dir, 0.1f, 0.05f, 1))->unref();
     50 }
     51 
     52 static void paint_proc3(SkPaint* paint) {
     53     SkColor colors[] = { SK_ColorRED, COLOR, SK_ColorBLUE };
     54     SkPoint pts[] = { { 3, 0 }, { 7, 5 } };
     55     paint->setShader(SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors),
     56                                         SkShader::kMirror_TileMode))->unref();
     57 }
     58 
     59 static void paint_proc5(SkPaint* paint) {
     60     paint_proc3(paint);
     61     paint_proc2(paint);
     62 }
     63 
     64 typedef void (*PaintProc)(SkPaint*);
     65 const PaintProc gPaintProcs[] = {
     66     paint_proc0,
     67     paint_proc1,
     68     paint_proc2,
     69     paint_proc3,
     70     paint_proc5,
     71 };
     72 
     73 ///////////////////////////////////////////////////////////////////////////////
     74 
     75 class EffectsView : public SampleView {
     76 public:
     77     SkPath fPath;
     78     SkPaint fPaint[SK_ARRAY_COUNT(gPaintProcs)];
     79 
     80 	EffectsView() {
     81         size_t i;
     82         const float pts[] = {
     83             0, 0,
     84             10, 0,
     85             10, 5,
     86             20, -5,
     87             10, -15,
     88             10, -10,
     89             0, -10
     90         };
     91         fPath.moveTo(pts[0], pts[1]);
     92         for (i = 2; i < SK_ARRAY_COUNT(pts); i += 2) {
     93             fPath.lineTo(pts[i], pts[i+1]);
     94         }
     95 
     96         for (i = 0; i < SK_ARRAY_COUNT(gPaintProcs); i++) {
     97             fPaint[i].setAntiAlias(true);
     98             fPaint[i].setColor(COLOR);
     99             gPaintProcs[i](&fPaint[i]);
    100         }
    101 
    102         test_edgeclipper();
    103         SkColorMatrix cm;
    104         cm.setRotate(SkColorMatrix::kG_Axis, 180);
    105         cm.setIdentity();
    106 
    107         this->setBGColor(0xFFDDDDDD);
    108     }
    109 
    110 protected:
    111     // overrides from SkEventSink
    112     virtual bool onQuery(SkEvent* evt) {
    113         if (SampleCode::TitleQ(*evt)) {
    114             SampleCode::TitleR(evt, "Effects");
    115             return true;
    116         }
    117         return this->INHERITED::onQuery(evt);
    118     }
    119 
    120     virtual void onDrawContent(SkCanvas* canvas) {
    121         canvas->scale(3, 3);
    122         canvas->translate(10, 30);
    123         for (size_t i = 0; i < SK_ARRAY_COUNT(fPaint); i++) {
    124             canvas->drawPath(fPath, fPaint[i]);
    125             canvas->translate(32, 0);
    126         }
    127     }
    128 
    129 private:
    130     typedef SampleView INHERITED;
    131 };
    132 
    133 ///////////////////////////////////////////////////////////////////////////////
    134 
    135 static SkView* MyFactory() { return new EffectsView; }
    136 static SkViewRegister reg(MyFactory);
    137