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Diffstat (limited to 'samplecode/SampleCowboy.cpp')
-rw-r--r-- | samplecode/SampleCowboy.cpp | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/samplecode/SampleCowboy.cpp b/samplecode/SampleCowboy.cpp new file mode 100644 index 0000000000..1191cd4d3e --- /dev/null +++ b/samplecode/SampleCowboy.cpp @@ -0,0 +1,144 @@ +/* + * 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 { + fPath = GetResourcePath("Cowboy.svg"); + SkFILEStream svgStream(fPath.c_str()); + if (!svgStream.isValid()) { + SkDebugf("file not found: \"path\"\n", fPath.c_str()); + return; + } + + 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(); ) + |