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