1/*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7#include "SampleCode.h"
8#include "SkBlurMask.h"
9#include "SkBlurMaskFilter.h"
10#include "SkCanvas.h"
11#include "SkColorMatrixFilter.h"
12#include "SkDiscretePathEffect.h"
13#include "SkEmbossMaskFilter.h"
14#include "SkGradientShader.h"
15#include "SkPaint.h"
16#include "SkView.h"
17
18
19//#define COLOR 0xFFFF8844
20#define COLOR 0xFF888888
21
22static void paint_proc0(SkPaint*) {
23}
24
25static void paint_proc1(SkPaint* paint) {
26    paint->setMaskFilter(SkBlurMaskFilter::Make(
27                                kNormal_SkBlurStyle,
28                                SkBlurMask::ConvertRadiusToSigma(2)));
29}
30
31static void paint_proc2(SkPaint* paint) {
32    paint->setMaskFilter(SkEmbossMaskFilter::Make(
33            SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)),
34            { { SK_Scalar1, SK_Scalar1, SK_Scalar1 }, 0, 64, 16 }));
35}
36
37static void paint_proc3(SkPaint* paint) {
38    SkColor colors[] = { SK_ColorRED, COLOR, SK_ColorBLUE };
39    SkPoint pts[] = { { 3, 0 }, { 7, 5 } };
40    paint->setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
41                                                  SkShader::kMirror_TileMode));
42}
43
44static void paint_proc5(SkPaint* paint) {
45    paint_proc3(paint);
46    paint_proc2(paint);
47}
48
49typedef void (*PaintProc)(SkPaint*);
50const PaintProc gPaintProcs[] = {
51    paint_proc0,
52    paint_proc1,
53    paint_proc2,
54    paint_proc3,
55    paint_proc5,
56};
57
58///////////////////////////////////////////////////////////////////////////////
59
60class EffectsView : public SampleView {
61public:
62    SkPath fPath;
63    SkPaint fPaint[SK_ARRAY_COUNT(gPaintProcs)];
64
65    EffectsView() {
66        size_t i;
67        const float pts[] = {
68            0, 0,
69            10, 0,
70            10, 5,
71            20, -5,
72            10, -15,
73            10, -10,
74            0, -10
75        };
76        fPath.moveTo(pts[0], pts[1]);
77        for (i = 2; i < SK_ARRAY_COUNT(pts); i += 2) {
78            fPath.lineTo(pts[i], pts[i+1]);
79        }
80
81        for (i = 0; i < SK_ARRAY_COUNT(gPaintProcs); i++) {
82            fPaint[i].setAntiAlias(true);
83            fPaint[i].setColor(COLOR);
84            gPaintProcs[i](&fPaint[i]);
85        }
86
87        SkColorMatrix cm;
88        cm.setRotate(SkColorMatrix::kG_Axis, 180);
89        cm.setIdentity();
90
91        this->setBGColor(0xFFDDDDDD);
92    }
93
94protected:
95    // overrides from SkEventSink
96    virtual bool onQuery(SkEvent* evt) {
97        if (SampleCode::TitleQ(*evt)) {
98            SampleCode::TitleR(evt, "Effects");
99            return true;
100        }
101        return this->INHERITED::onQuery(evt);
102    }
103
104    virtual void onDrawContent(SkCanvas* canvas) {
105        canvas->scale(3, 3);
106        canvas->translate(10, 30);
107        for (size_t i = 0; i < SK_ARRAY_COUNT(fPaint); i++) {
108            canvas->drawPath(fPath, fPaint[i]);
109            canvas->translate(32, 0);
110        }
111    }
112
113private:
114    typedef SampleView INHERITED;
115};
116
117///////////////////////////////////////////////////////////////////////////////
118
119static SkView* MyFactory() { return new EffectsView; }
120static SkViewRegister reg(MyFactory);
121