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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SampleCode.h"
#include "Resources.h"
#include "SkCanvas.h"
#include "SkDOM.h"
#include "SkOSFile.h"
#include "SkOSPath.h"
#include "SkRect.h"
#include "SkStream.h"
#include "SkSVGDOM.h"
#include "SkView.h"
namespace {
class CowboyView : public SampleView {
public:
CowboyView()
: fLabel("SampleCowboy")
, fState(kZoomIn)
, fAnimationLoop(kAnimationIterations)
, fDelta(1) {}
~CowboyView() override = default;
protected:
static constexpr auto kAnimationIterations = 5;
enum State {
kZoomIn,
kScroll,
kZoomOut
};
void onOnceBeforeDraw() override {
constexpr char path[] = "Cowboy.svg";
auto data = GetResourceAsData(path);
if (!data) {
SkDebugf("file not found: \"%s\"\n", path);
return;
}
SkMemoryStream svgStream(std::move(data));
SkDOM xmlDom;
if (!xmlDom.build(svgStream)) {
SkDebugf("XML parsing failed: \"path\"\n", fPath.c_str());
return;
}
fDom = SkSVGDOM::MakeFromDOM(xmlDom);
if (fDom) {
fDom->setContainerSize(SkSize::Make(this->width(), this->height()));
}
}
void onDrawContent(SkCanvas* canvas) override {
if (fDom) {
canvas->setMatrix(SkMatrix::MakeScale(3));
canvas->clipRect(SkRect::MakeLTRB(0, 0, 400, 400));
switch (fState) {
case kZoomIn:
fDelta += 0.2f;
canvas->concat(SkMatrix::MakeScale(fDelta));
break;
case kScroll:
if (fAnimationLoop > kAnimationIterations/2) {
fDelta += 80.f;
} else {
fDelta -= 80.f;
}
canvas->concat(SkMatrix::MakeScale(fDelta));
canvas->translate(fDelta, 0);
break;
case kZoomOut:
fDelta += 0.2f;
canvas->concat(SkMatrix::MakeScale(fDelta));
break;
}
fDom->render(canvas);
}
}
void onSizeChange() override {
if (fDom) {
fDom->setContainerSize(SkSize::Make(this->width(), this->height()));
}
this->INHERITED::onSizeChange();
}
bool onQuery(SkEvent* evt) override {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, fLabel.c_str());
return true;
}
return this->INHERITED::onQuery(evt);
}
bool onAnimate(const SkAnimTimer& timer) override {
if (!fDom) {
return false;
}
--fAnimationLoop;
if (fAnimationLoop == 0) {
fAnimationLoop = kAnimationIterations;
switch (fState) {
case kZoomIn:
fState = kScroll;
fDelta = 0;
break;
case kScroll:
fState = kZoomOut;
fDelta = 2;
break;
case kZoomOut:
fState = kZoomIn;
fDelta = 1;
break;
}
}
return true;
}
private:
sk_sp<SkSVGDOM> fDom;
SkString fPath;
SkString fLabel;
State fState;
int fAnimationLoop;
SkScalar fDelta;
typedef SampleView INHERITED;
};
} // anonymous namespace
DEF_SAMPLE( return new CowboyView(); )
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