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
8 #include "gm.h"
9 #include "SkBlurMask.h"
10 #include "SkBlurMaskFilter.h"
11 #include "SkCanvas.h"
12 #include "SkGraphics.h"
13 #include "SkLayerDrawLooper.h"
14 #include "SkRandom.h"
15
16 #define WIDTH 200
17 #define HEIGHT 200
18
19 class DrawLooperGM : public skiagm::GM {
20 public:
DrawLooperGM()21 DrawLooperGM() : fLooper(NULL) {
22 this->setBGColor(0xFFDDDDDD);
23 }
24
~DrawLooperGM()25 virtual ~DrawLooperGM() {
26 SkSafeUnref(fLooper);
27 }
28
29 protected:
onISize()30 virtual SkISize onISize() override {
31 return SkISize::Make(520, 160);
32 }
33
onShortName()34 SkString onShortName() override {
35 return SkString("drawlooper");
36 }
37
onDraw(SkCanvas * canvas)38 void onDraw(SkCanvas* canvas) override {
39 this->init();
40
41 SkPaint paint;
42 paint.setAntiAlias(true);
43 sk_tool_utils::set_portable_typeface(&paint);
44 paint.setTextSize(SkIntToScalar(72));
45 paint.setLooper(fLooper);
46
47 canvas->drawCircle(SkIntToScalar(50), SkIntToScalar(50),
48 SkIntToScalar(30), paint);
49
50 canvas->drawRectCoords(SkIntToScalar(150), SkIntToScalar(50),
51 SkIntToScalar(200), SkIntToScalar(100), paint);
52
53 canvas->drawText("Looper", 6, SkIntToScalar(230), SkIntToScalar(100),
54 paint);
55 }
56
57 private:
58 SkLayerDrawLooper* fLooper;
59
init()60 void init() {
61 if (fLooper) return;
62
63 static const struct {
64 SkColor fColor;
65 SkPaint::Style fStyle;
66 SkScalar fWidth;
67 SkScalar fOffset;
68 SkScalar fBlur;
69 } gParams[] = {
70 { SK_ColorWHITE, SkPaint::kStroke_Style, SkIntToScalar(1)*3/4, 0, 0 },
71 { SK_ColorRED, SkPaint::kStroke_Style, SkIntToScalar(4), 0, 0 },
72 { SK_ColorBLUE, SkPaint::kFill_Style, 0, 0, 0 },
73 { 0x88000000, SkPaint::kFill_Style, 0, SkIntToScalar(10), SkIntToScalar(3) }
74 };
75
76 SkLayerDrawLooper::Builder looperBuilder;
77
78 SkLayerDrawLooper::LayerInfo info;
79 info.fPaintBits = SkLayerDrawLooper::kStyle_Bit | SkLayerDrawLooper::kMaskFilter_Bit;
80 info.fColorMode = SkXfermode::kSrc_Mode;
81
82 for (size_t i = 0; i < SK_ARRAY_COUNT(gParams); i++) {
83 info.fOffset.set(gParams[i].fOffset, gParams[i].fOffset);
84 SkPaint* paint = looperBuilder.addLayer(info);
85 paint->setColor(gParams[i].fColor);
86 paint->setStyle(gParams[i].fStyle);
87 paint->setStrokeWidth(gParams[i].fWidth);
88 if (gParams[i].fBlur > 0) {
89 SkMaskFilter* mf = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
90 SkBlurMask::ConvertRadiusToSigma(gParams[i].fBlur));
91 paint->setMaskFilter(mf)->unref();
92 }
93 }
94 fLooper = looperBuilder.detachLooper();
95 }
96
97 typedef GM INHERITED;
98 };
99
100 //////////////////////////////////////////////////////////////////////////////
101
MyFactory(void *)102 static skiagm::GM* MyFactory(void*) { return new DrawLooperGM; }
103 static skiagm::GMRegistry reg(MyFactory);
104