| |
| /* |
| * Copyright 2011 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 "SkView.h" |
| #include "SkCanvas.h" |
| |
| static const int kILimit = 101; |
| static const SkScalar kLimit = SK_Scalar1 * kILimit; |
| |
| class OvalTestView : public SampleView { |
| public: |
| SkSize fSize; |
| SkPMColor fInsideColor; // signals an interior pixel that was not set |
| SkPMColor fOutsideColor; // signals an exterior pixels that was set |
| SkBitmap fBitmap; |
| |
| OvalTestView() { |
| fSize.set(SK_Scalar1, SK_Scalar1); |
| |
| fBitmap.allocN32Pixels(kILimit, kILimit); |
| |
| fInsideColor = SkPreMultiplyColor(SK_ColorRED); |
| fOutsideColor = SkPreMultiplyColor(SK_ColorGREEN); |
| |
| this->setBGColor(0xFFDDDDDD); |
| } |
| |
| protected: |
| // overrides from SkEventSink |
| virtual bool onQuery(SkEvent* evt) { |
| if (SampleCode::TitleQ(*evt)) { |
| SampleCode::TitleR(evt, "OvalTest"); |
| return true; |
| } |
| return this->INHERITED::onQuery(evt); |
| } |
| |
| void drawOval() { |
| SkCanvas canvas(fBitmap); |
| SkPaint p; |
| |
| fBitmap.eraseColor(SK_ColorTRANSPARENT); |
| canvas.drawOval(SkRect::MakeSize(fSize), p); |
| } |
| |
| int checkOval(int* flatCount, int* buldgeCount) { |
| int flatc = 0; |
| int buldgec = 0; |
| const SkScalar rad = SkScalarHalf(fSize.width()); |
| SkScalar cx = SkScalarHalf(fSize.width()); |
| SkScalar cy = SkScalarHalf(fSize.height()); |
| for (int y = 0; y < kILimit; y++) { |
| for (int x = 0; x < kILimit; x++) { |
| // measure from pixel centers |
| SkScalar px = SkIntToScalar(x) + SK_ScalarHalf; |
| SkScalar py = SkIntToScalar(y) + SK_ScalarHalf; |
| |
| SkPMColor* ptr = fBitmap.getAddr32(x, y); |
| SkScalar dist = SkPoint::Length(px - cx, py - cy); |
| if (dist <= rad && !*ptr) { |
| flatc++; |
| *ptr = fInsideColor; |
| } else if (dist > rad && *ptr) { |
| buldgec++; |
| *ptr = fOutsideColor; |
| } |
| } |
| } |
| if (flatCount) *flatCount = flatc; |
| if (buldgeCount) *buldgeCount = buldgec; |
| return flatc + buldgec; |
| } |
| |
| virtual void onDrawContent(SkCanvas* canvas) { |
| this->drawOval(); |
| int flatCount, buldgeCount; |
| this->checkOval(&flatCount, &buldgeCount); |
| this->inval(NULL); |
| |
| canvas->drawBitmap(fBitmap, SkIntToScalar(20), SkIntToScalar(20), NULL); |
| |
| |
| static int gFlatCount; |
| static int gBuldgeCount; |
| gFlatCount += flatCount; |
| gBuldgeCount += buldgeCount; |
| |
| if (fSize.fWidth < kLimit) { |
| SkDebugf("--- width=%g, flat=%d buldge=%d total: flat=%d buldge=%d\n", fSize.fWidth, |
| flatCount, buldgeCount, gFlatCount, gBuldgeCount); |
| fSize.fWidth += SK_Scalar1; |
| fSize.fHeight += SK_Scalar1; |
| } else { |
| // fSize.set(SK_Scalar1, SK_Scalar1); |
| } |
| } |
| |
| SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) SK_OVERRIDE { |
| this->inval(NULL); |
| return NULL; |
| } |
| |
| private: |
| typedef SampleView INHERITED; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static SkView* MyFactory() { return new OvalTestView; } |
| static SkViewRegister reg(MyFactory); |