1 /*
2 * Copyright 2015 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 "SKPAnimationBench.h"
9 #include "SkCommandLineFlags.h"
10 #include "SkMultiPictureDraw.h"
11 #include "SkSurface.h"
12
SKPAnimationBench(const char * name,const SkPicture * pic,const SkIRect & clip,Animation * animation,bool doLooping)13 SKPAnimationBench::SKPAnimationBench(const char* name, const SkPicture* pic, const SkIRect& clip,
14 Animation* animation, bool doLooping)
15 : INHERITED(name, pic, clip, 1.0, false, doLooping)
16 , fAnimation(SkRef(animation)) {
17 fUniqueName.printf("%s_%s", name, fAnimation->getTag());
18 }
19
onGetUniqueName()20 const char* SKPAnimationBench::onGetUniqueName() {
21 return fUniqueName.c_str();
22 }
23
onPerCanvasPreDraw(SkCanvas * canvas)24 void SKPAnimationBench::onPerCanvasPreDraw(SkCanvas* canvas) {
25 INHERITED::onPerCanvasPreDraw(canvas);
26 fDevBounds = canvas->getDeviceClipBounds();
27 SkAssertResult(!fDevBounds.isEmpty());
28 fAnimationTimer.start();
29 }
30
drawPicture()31 void SKPAnimationBench::drawPicture() {
32 fAnimationTimer.end();
33
34 for (int j = 0; j < this->tileRects().count(); ++j) {
35 SkMatrix trans = SkMatrix::MakeTrans(-1.f * this->tileRects()[j].fLeft,
36 -1.f * this->tileRects()[j].fTop);
37 fAnimation->preConcatFrameMatrix(fAnimationTimer.fWall, fDevBounds, &trans);
38 this->surfaces()[j]->getCanvas()->drawPicture(this->picture(), &trans, nullptr);
39 }
40
41 for (int j = 0; j < this->tileRects().count(); ++j) {
42 this->surfaces()[j]->getCanvas()->flush();
43 }
44 }
45
46 class ZoomAnimation : public SKPAnimationBench::Animation {
47 public:
ZoomAnimation(SkScalar zoomMax,double zoomPeriodMs)48 ZoomAnimation(SkScalar zoomMax, double zoomPeriodMs)
49 : fZoomMax(zoomMax)
50 , fZoomPeriodMs(zoomPeriodMs) {
51 }
52
getTag()53 virtual const char* getTag() { return "zoom"; }
54
preConcatFrameMatrix(double animationTimeMs,const SkIRect & devBounds,SkMatrix * drawMatrix)55 virtual void preConcatFrameMatrix(double animationTimeMs, const SkIRect& devBounds,
56 SkMatrix* drawMatrix) {
57 double t = fmod(animationTimeMs / fZoomPeriodMs, 1.0); // t is in [0, 1).
58 t = fabs(2 * t - 1); // Make t ping-pong between 0 and 1
59 SkScalar zoom = static_cast<SkScalar>(pow(fZoomMax, t));
60
61 SkPoint center = SkPoint::Make((devBounds.fLeft + devBounds.fRight) / 2.0f,
62 (devBounds.fTop + devBounds.fBottom) / 2.0f);
63 drawMatrix->preTranslate(center.fX, center.fY);
64 drawMatrix->preScale(zoom, zoom);
65 drawMatrix->preTranslate(-center.fX, -center.fY);
66 }
67
68 private:
69 double fZoomMax;
70 double fZoomPeriodMs;
71 };
72
CreateZoomAnimation(SkScalar zoomMax,double zoomPeriodMs)73 SKPAnimationBench::Animation* SKPAnimationBench::CreateZoomAnimation(SkScalar zoomMax,
74 double zoomPeriodMs) {
75 return new ZoomAnimation(zoomMax, zoomPeriodMs);
76 }
77