1 /*
2 * Copyright 2016 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 "SampleCode.h"
9 #include "SkCanvas.h"
10
11 #if SK_SUPPORT_GPU
12 # include "GrContext.h"
13 #else
14 class GrContext;
15 #endif
16
17 //////////////////////////////////////////////////////////////////////////////
18
CharQ(const SkEvent & evt,SkUnichar * outUni)19 bool SampleCode::CharQ(const SkEvent& evt, SkUnichar* outUni) {
20 if (evt.isType(gCharEvtName, sizeof(gCharEvtName) - 1)) {
21 if (outUni) {
22 *outUni = evt.getFast32();
23 }
24 return true;
25 }
26 return false;
27 }
28
KeyQ(const SkEvent & evt,SkKey * outKey)29 bool SampleCode::KeyQ(const SkEvent& evt, SkKey* outKey) {
30 if (evt.isType(gKeyEvtName, sizeof(gKeyEvtName) - 1)) {
31 if (outKey) {
32 *outKey = (SkKey)evt.getFast32();
33 }
34 return true;
35 }
36 return false;
37 }
38
TitleQ(const SkEvent & evt)39 bool SampleCode::TitleQ(const SkEvent& evt) {
40 return evt.isType(gTitleEvtName, sizeof(gTitleEvtName) - 1);
41 }
42
TitleR(SkEvent * evt,const char title[])43 void SampleCode::TitleR(SkEvent* evt, const char title[]) {
44 SkASSERT(evt && TitleQ(*evt));
45 evt->setString(gTitleEvtName, title);
46 }
47
RequestTitle(SkView * view,SkString * title)48 bool SampleCode::RequestTitle(SkView* view, SkString* title) {
49 SkEvent evt(gTitleEvtName);
50 if (view->doQuery(&evt)) {
51 title->set(evt.findString(gTitleEvtName));
52 return true;
53 }
54 return false;
55 }
56
PrefSizeQ(const SkEvent & evt)57 bool SampleCode::PrefSizeQ(const SkEvent& evt) {
58 return evt.isType(gPrefSizeEvtName, sizeof(gPrefSizeEvtName) - 1);
59 }
60
PrefSizeR(SkEvent * evt,SkScalar width,SkScalar height)61 void SampleCode::PrefSizeR(SkEvent* evt, SkScalar width, SkScalar height) {
62 SkASSERT(evt && PrefSizeQ(*evt));
63 SkScalar size[2];
64 size[0] = width;
65 size[1] = height;
66 evt->setScalars(gPrefSizeEvtName, 2, size);
67 }
68
FastTextQ(const SkEvent & evt)69 bool SampleCode::FastTextQ(const SkEvent& evt) {
70 return evt.isType(gFastTextEvtName, sizeof(gFastTextEvtName) - 1);
71 }
72
73 SkViewRegister* SkViewRegister::gHead;
SkViewRegister(SkViewFactory * fact)74 SkViewRegister::SkViewRegister(SkViewFactory* fact) : fFact(fact) {
75 fFact->ref();
76 fChain = gHead;
77 gHead = this;
78 }
79
80 ///////////////////////////////////////////////////////////////////////////////
81
SkFuncViewFactory(SkViewCreateFunc func)82 SkFuncViewFactory::SkFuncViewFactory(SkViewCreateFunc func)
83 : fCreateFunc(func) {
84 }
85
operator ()() const86 SkView* SkFuncViewFactory::operator() () const {
87 return (*fCreateFunc)();
88 }
89
90 #include "GMSampleView.h"
91
SkGMSampleViewFactory(GMFactoryFunc func)92 SkGMSampleViewFactory::SkGMSampleViewFactory(GMFactoryFunc func)
93 : fFunc(func) {
94 }
95
operator ()() const96 SkView* SkGMSampleViewFactory::operator() () const {
97 skiagm::GM* gm = fFunc(nullptr);
98 gm->setMode(skiagm::GM::kSample_Mode);
99 return new GMSampleView(gm);
100 }
101
SkViewRegister(SkViewCreateFunc func)102 SkViewRegister::SkViewRegister(SkViewCreateFunc func) {
103 fFact = new SkFuncViewFactory(func);
104 fChain = gHead;
105 gHead = this;
106 }
107
SkViewRegister(GMFactoryFunc func)108 SkViewRegister::SkViewRegister(GMFactoryFunc func) {
109 fFact = new SkGMSampleViewFactory(func);
110 fChain = gHead;
111 gHead = this;
112 }
113
114 ///////////////////////////////////////////////////////////////////////////////
115
116 static const char is_sample_view_tag[] = "sample-is-sample-view";
117 static const char repeat_count_tag[] = "sample-set-repeat-count";
118
IsSampleView(SkView * view)119 bool SampleView::IsSampleView(SkView* view) {
120 SkEvent evt(is_sample_view_tag);
121 return view->doQuery(&evt);
122 }
123
SetRepeatDraw(SkView * view,int count)124 bool SampleView::SetRepeatDraw(SkView* view, int count) {
125 SkEvent evt(repeat_count_tag);
126 evt.setFast32(count);
127 return view->doEvent(evt);
128 }
129
onEvent(const SkEvent & evt)130 bool SampleView::onEvent(const SkEvent& evt) {
131 if (evt.isType(repeat_count_tag)) {
132 fRepeatCount = evt.getFast32();
133 return true;
134 }
135 return this->INHERITED::onEvent(evt);
136 }
137
onQuery(SkEvent * evt)138 bool SampleView::onQuery(SkEvent* evt) {
139 if (evt->isType(is_sample_view_tag)) {
140 return true;
141 }
142 return this->INHERITED::onQuery(evt);
143 }
144
onDraw(SkCanvas * canvas)145 void SampleView::onDraw(SkCanvas* canvas) {
146 if (!fHaveCalledOnceBeforeDraw) {
147 fHaveCalledOnceBeforeDraw = true;
148 this->onOnceBeforeDraw();
149 }
150 this->onDrawBackground(canvas);
151
152 for (int i = 0; i < fRepeatCount; i++) {
153 SkAutoCanvasRestore acr(canvas, true);
154 this->onDrawContent(canvas);
155 #if SK_SUPPORT_GPU
156 // Ensure the GrContext doesn't combine GrDrawOps across draw loops.
157 if (GrContext* context = canvas->getGrContext()) {
158 context->flush();
159 }
160 #endif
161 }
162 }
163
onDrawBackground(SkCanvas * canvas)164 void SampleView::onDrawBackground(SkCanvas* canvas) {
165 canvas->drawColor(fBGColor);
166 }
167
168