41248071ac
gm, slides, and samples no longer need to know about the implementation
details of AnimTimer.
This
virtual bool onAnimate(const AnimTimer&);
becomes this:
virtual bool onAnimate(double /*nanoseconds*/);
which is much easier to reason about.
AnimTimer itself is now part of viewer.
Change-Id: Ib70bf7a0798b1991f25204ae84f70463cdbeb358
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/226838
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
143 lines
3.6 KiB
C++
143 lines
3.6 KiB
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "include/core/SkTypes.h"
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#ifdef SK_XML
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#include "experimental/svg/model/SkSVGDOM.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkStream.h"
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#include "samplecode/Sample.h"
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#include "src/core/SkOSFile.h"
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#include "src/utils/SkOSPath.h"
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#include "src/xml/SkDOM.h"
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#include "tools/Resources.h"
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namespace {
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class CowboyView : public Sample {
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public:
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CowboyView()
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: fLabel("SampleCowboy")
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, fState(kZoomIn)
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, fAnimationLoop(kAnimationIterations)
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, fDelta(1) {}
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~CowboyView() override = default;
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protected:
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static constexpr auto kAnimationIterations = 5;
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enum State {
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kZoomIn,
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kScroll,
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kZoomOut
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};
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void onOnceBeforeDraw() override {
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constexpr char path[] = "Cowboy.svg";
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auto data = GetResourceAsData(path);
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if (!data) {
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SkDebugf("file not found: \"%s\"\n", path);
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return;
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}
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SkMemoryStream svgStream(std::move(data));
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SkDOM xmlDom;
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if (!xmlDom.build(svgStream)) {
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SkDebugf("XML parsing failed: \"path\"\n", fPath.c_str());
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return;
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}
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fDom = SkSVGDOM::MakeFromDOM(xmlDom);
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if (fDom) {
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fDom->setContainerSize(SkSize::Make(this->width(), this->height()));
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}
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}
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void onDrawContent(SkCanvas* canvas) override {
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if (fDom) {
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canvas->setMatrix(SkMatrix::MakeScale(3));
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canvas->clipRect(SkRect::MakeLTRB(0, 0, 400, 400));
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switch (fState) {
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case kZoomIn:
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fDelta += 0.2f;
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canvas->concat(SkMatrix::MakeScale(fDelta));
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break;
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case kScroll:
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if (fAnimationLoop > kAnimationIterations/2) {
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fDelta += 80.f;
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} else {
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fDelta -= 80.f;
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}
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canvas->concat(SkMatrix::MakeScale(fDelta));
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canvas->translate(fDelta, 0);
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break;
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case kZoomOut:
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fDelta += 0.2f;
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canvas->concat(SkMatrix::MakeScale(fDelta));
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break;
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}
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fDom->render(canvas);
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}
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}
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void onSizeChange() override {
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if (fDom) {
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fDom->setContainerSize(SkSize::Make(this->width(), this->height()));
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}
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this->INHERITED::onSizeChange();
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}
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SkString name() override { return fLabel; }
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bool onAnimate(double nanos) override {
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if (!fDom) {
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return false;
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}
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--fAnimationLoop;
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if (fAnimationLoop == 0) {
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fAnimationLoop = kAnimationIterations;
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switch (fState) {
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case kZoomIn:
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fState = kScroll;
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fDelta = 0;
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break;
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case kScroll:
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fState = kZoomOut;
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fDelta = 2;
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break;
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case kZoomOut:
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fState = kZoomIn;
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fDelta = 1;
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break;
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}
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}
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return true;
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}
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private:
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sk_sp<SkSVGDOM> fDom;
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SkString fPath;
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SkString fLabel;
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State fState;
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int fAnimationLoop;
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SkScalar fDelta;
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typedef Sample INHERITED;
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};
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} // anonymous namespace
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DEF_SAMPLE( return new CowboyView(); )
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#endif // SK_XML
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