| /* |
| * 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 "include/core/SkTypes.h" |
| |
| #if defined(SK_ENABLE_SVG) |
| |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkStream.h" |
| #include "modules/svg/include/SkSVGDOM.h" |
| #include "modules/svg/include/SkSVGNode.h" |
| #include "src/core/SkOSFile.h" |
| #include "src/utils/SkOSPath.h" |
| #include "src/xml/SkDOM.h" |
| #include "tools/Resources.h" |
| #include "tools/viewer/Slide.h" |
| |
| namespace { |
| class AnimatedSVGSlide : public Slide { |
| inline static constexpr auto kAnimationIterations = 5; |
| enum State { |
| kZoomIn, |
| kScroll, |
| kZoomOut |
| }; |
| sk_sp<SkSVGDOM> fDom; |
| const char* fResource = nullptr; |
| State fState = kZoomIn; |
| int fAnimationLoop = kAnimationIterations; |
| SkScalar fDelta = 1; |
| |
| public: |
| AnimatedSVGSlide(const char* r, const char* n) : fResource(r) { fName = n; } |
| |
| void load(SkScalar w, SkScalar h) override { |
| SkASSERT(fResource); |
| auto data = GetResourceAsData(fResource); |
| if (!data) { |
| SkDebugf("Resource not found: \"%s\"\n", fResource); |
| return; |
| } |
| SkMemoryStream svgStream(std::move(data)); |
| |
| fDom = SkSVGDOM::MakeFromStream(svgStream); |
| if (fDom) { |
| fDom->setContainerSize(SkSize::Make(w, h)); |
| } |
| } |
| |
| void draw(SkCanvas* canvas) override { |
| if (fDom) { |
| canvas->setMatrix(SkMatrix::Scale(3, 3)); |
| canvas->clipRect(SkRect::MakeLTRB(0, 0, 400, 400)); |
| switch (fState) { |
| case kZoomIn: |
| fDelta += 0.2f; |
| canvas->scale(fDelta, fDelta); |
| break; |
| case kScroll: |
| if (fAnimationLoop > kAnimationIterations/2) { |
| fDelta += 80.f; |
| } else { |
| fDelta -= 80.f; |
| } |
| canvas->scale(fDelta, fDelta); |
| canvas->translate(fDelta, 0); |
| break; |
| case kZoomOut: |
| fDelta += 0.2f; |
| canvas->scale(fDelta, fDelta); |
| break; |
| } |
| |
| fDom->render(canvas); |
| } |
| } |
| |
| void resize(SkScalar w, SkScalar h) override { |
| if (fDom) { |
| fDom->setContainerSize(SkSize::Make(w, h)); |
| } |
| } |
| |
| bool animate(double nanos) 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; |
| } |
| }; |
| } // namespace |
| |
| DEF_SLIDE( return new AnimatedSVGSlide("Cowboy.svg", "SampleCowboy"); ) |
| |
| #endif // defined(SK_ENABLE_SVG) |