Add ship sample
BUG=skia:
Review URL: https://codereview.chromium.org/1359033005
diff --git a/gyp/SampleApp.gyp b/gyp/SampleApp.gyp
index e73eb2d..6cdb31d 100644
--- a/gyp/SampleApp.gyp
+++ b/gyp/SampleApp.gyp
@@ -98,6 +98,7 @@
'../samplecode/SampleRepeatTile.cpp',
'../samplecode/SampleShaders.cpp',
'../samplecode/SampleShaderText.cpp',
+ '../samplecode/SampleShip.cpp',
'../samplecode/SampleSkLayer.cpp',
'../samplecode/SampleSlides.cpp',
'../samplecode/SampleStringArt.cpp',
diff --git a/samplecode/SampleShip.cpp b/samplecode/SampleShip.cpp
new file mode 100644
index 0000000..6553266
--- /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"); )
