diff options
author | 2015-10-05 11:05:07 -0700 | |
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committer | 2015-10-05 11:05:07 -0700 | |
commit | 2f5bb3abfacadc8bdbc95381ab9d4fa218994a9f (patch) | |
tree | ce61d51a9a6f954429e3b1b5190b29eec202b516 /samplecode | |
parent | 303fa350125f372bbfc29bec1235885493dab9b4 (diff) |
Add ship sample
BUG=skia:
Review URL: https://codereview.chromium.org/1359033005
Diffstat (limited to 'samplecode')
-rw-r--r-- | samplecode/SampleShip.cpp | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/samplecode/SampleShip.cpp b/samplecode/SampleShip.cpp new file mode 100644 index 0000000000..6553266a14 --- /dev/null +++ b/samplecode/SampleShip.cpp @@ -0,0 +1,156 @@ +/* + * Copyright 2015 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 "SkAnimTimer.h" +#include "SkView.h" +#include "SkCanvas.h" +#include "SkRSXform.h" +#include "SkSurface.h" +#include "Timer.h" + +#include <stdio.h> + +static const int kGrid = 100; +static const int kWidth = 960; +static const int kHeight = 640; + +class DrawShipView : public SampleView { + const char* fName; + +public: + DrawShipView(const char name[]) : fName(name) { + fAtlas.reset(GetResourceAsImage("ship.png")); + if (!fAtlas) { + SkDebugf("\nCould not decode file ship.png. Falling back to penguin mode.\n"); + fAtlas.reset(GetResourceAsImage("baby_tux.png")); + if (!fAtlas) { + SkDebugf("\nCould not decode file baby_tux.png. Did you forget" + " to set the resourcePath?\n"); + return; + } + } + + SkScalar anchorX = fAtlas->width()*0.5f; + SkScalar anchorY = fAtlas->height()*0.5f; + int currIndex = 0; + for (int x = 0; x < kGrid; x++) { + for (int y = 0; y < kGrid; y++) { + float xPos = (x / (kGrid - 1.0f)) * kWidth; + float yPos = (y / (kGrid - 1.0f)) * kWidth; + + fTex[currIndex] = SkRect::MakeLTRB(0.0f, 0.0f, + SkIntToScalar(fAtlas->width()), + SkIntToScalar(fAtlas->height())); + fXform[currIndex] = SkRSXform::MakeFromRadians(2.0f, SK_ScalarPI*0.5f, + xPos, yPos, anchorX, anchorY); + currIndex++; + } + } + fTex[currIndex] = SkRect::MakeLTRB(0.0f, 0.0f, + SkIntToScalar(fAtlas->width()), + SkIntToScalar(fAtlas->height())); + fXform[currIndex] = SkRSXform::MakeFromRadians(2.0f, SK_ScalarPI*0.5f, + kWidth*0.5f, kHeight*0.5f, anchorX, anchorY); + + fCurrentTime = 0; + fTimer.start(); + } + + ~DrawShipView() override {} + +protected: + // overrides from SkEventSink + bool onQuery(SkEvent* evt) override { + if (SampleCode::TitleQ(*evt)) { + SampleCode::TitleR(evt, fName); + return true; + } + return this->INHERITED::onQuery(evt); + } + + void onDrawContent(SkCanvas* canvas) override { + const float kCosDiff = 0.99984769515f; + const float kSinDiff = 0.01745240643f; + + if (!fAtlas) { + return; + } + + SkPaint paint; + paint.setFilterQuality(kLow_SkFilterQuality); + paint.setColor(SK_ColorWHITE); + paint.setTextSize(15.0f); + + fTimer.end(); + + fTimes[fCurrentTime] = (float)(fTimer.fWall); + fCurrentTime = (fCurrentTime + 1) & 0x1f; + + float meanTime = 0.0f; + for (int i = 0; i < 32; ++i) { + meanTime += fTimes[i]; + } + meanTime /= 32.f; + SkString outString("fps: "); + SkScalar fps = 1000.f/meanTime; + outString.appendScalar(fps); + outString.append(" ms: "); + outString.appendScalar(meanTime); + + fTimer.start(); + + SkScalar anchorX = fAtlas->width()*0.5f; + SkScalar anchorY = fAtlas->height()*0.5f; + for (int i = 0; i < kGrid*kGrid+1; ++i) { + SkScalar c = fXform[i].fSCos; + SkScalar s = fXform[i].fSSin; + + SkScalar dx = c*anchorX - s*anchorY; + SkScalar dy = s*anchorX + c*anchorY; + + fXform[i].fSCos = kCosDiff*c - kSinDiff*s; + fXform[i].fSSin = kSinDiff*c + kCosDiff*s; + + dx -= fXform[i].fSCos*anchorX - fXform[i].fSSin*anchorY; + dy -= fXform[i].fSSin*anchorX + fXform[i].fSCos*anchorY; + fXform[i].fTx += dx; + fXform[i].fTy += dy; + } + + canvas->drawAtlas(fAtlas, fXform, fTex, nullptr, kGrid*kGrid+1, SkXfermode::kSrcOver_Mode, + nullptr, &paint); + canvas->drawText(outString.c_str(), outString.size(), 100.f, 100.f, paint); + + this->inval(nullptr); + } + +#if 0 + // TODO: switch over to use this for our animation + bool onAnimate(const SkAnimTimer& timer) override { + SkScalar angle = SkDoubleToScalar(fmod(timer.secs() * 360 / 24, 360)); + fAnimatingDrawable->setSweep(angle); + return true; + } +#endif + +private: + SkAutoTUnref<SkImage> fAtlas; + SkRSXform fXform[kGrid*kGrid+1]; + SkRect fTex[kGrid*kGrid+1]; + WallTimer fTimer; + float fTimes[32]; + int fCurrentTime; + + + typedef SampleView INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + +DEF_SAMPLE( return new DrawShipView("DrawShip"); ) |