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
13SKPAnimationBench::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
20const char* SKPAnimationBench::onGetUniqueName() {
21    return fUniqueName.c_str();
22}
23
24void SKPAnimationBench::onPerCanvasPreDraw(SkCanvas* canvas) {
25    INHERITED::onPerCanvasPreDraw(canvas);
26    fDevBounds = canvas->getDeviceClipBounds();
27    SkAssertResult(!fDevBounds.isEmpty());
28    fAnimationTimer.start();
29}
30
31void 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
46class ZoomAnimation : public SKPAnimationBench::Animation {
47public:
48    ZoomAnimation(SkScalar zoomMax, double zoomPeriodMs)
49        : fZoomMax(zoomMax)
50        , fZoomPeriodMs(zoomPeriodMs) {
51    }
52
53    virtual const char* getTag() { return "zoom"; }
54
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
68private:
69    double   fZoomMax;
70    double   fZoomPeriodMs;
71};
72
73SKPAnimationBench::Animation* SKPAnimationBench::CreateZoomAnimation(SkScalar zoomMax,
74                                                                     double zoomPeriodMs) {
75    return new ZoomAnimation(zoomMax, zoomPeriodMs);
76}
77