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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 #include "SampleCode.h"
      9 #include "SkView.h"
     10 #include "SkCanvas.h"
     11 
     12 static const int kILimit = 101;
     13 static const SkScalar kLimit = SK_Scalar1 * kILimit;
     14 
     15 class OvalTestView : public SampleView {
     16 public:
     17     SkSize      fSize;
     18     SkPMColor   fInsideColor;   // signals an interior pixel that was not set
     19     SkPMColor   fOutsideColor;  // signals an exterior pixels that was set
     20     SkBitmap    fBitmap;
     21 
     22     OvalTestView() {
     23         fSize.set(SK_Scalar1, SK_Scalar1);
     24 
     25         fBitmap.allocN32Pixels(kILimit, kILimit);
     26 
     27         fInsideColor = SkPreMultiplyColor(SK_ColorRED);
     28         fOutsideColor = SkPreMultiplyColor(SK_ColorGREEN);
     29 
     30         this->setBGColor(0xFFDDDDDD);
     31     }
     32 
     33 protected:
     34     // overrides from SkEventSink
     35     virtual bool onQuery(SkEvent* evt) {
     36         if (SampleCode::TitleQ(*evt)) {
     37             SampleCode::TitleR(evt, "OvalTest");
     38             return true;
     39         }
     40         return this->INHERITED::onQuery(evt);
     41     }
     42 
     43     void drawOval() {
     44         SkCanvas canvas(fBitmap);
     45         SkPaint p;
     46 
     47         fBitmap.eraseColor(SK_ColorTRANSPARENT);
     48         canvas.drawOval(SkRect::MakeSize(fSize), p);
     49     }
     50 
     51     int checkOval(int* flatCount, int* buldgeCount) {
     52         int flatc = 0;
     53         int buldgec = 0;
     54         const SkScalar rad = SkScalarHalf(fSize.width());
     55         SkScalar cx = SkScalarHalf(fSize.width());
     56         SkScalar cy = SkScalarHalf(fSize.height());
     57         for (int y = 0; y < kILimit; y++) {
     58             for (int x = 0; x < kILimit; x++) {
     59                 // measure from pixel centers
     60                 SkScalar px = SkIntToScalar(x) + SK_ScalarHalf;
     61                 SkScalar py = SkIntToScalar(y) + SK_ScalarHalf;
     62 
     63                 SkPMColor* ptr = fBitmap.getAddr32(x, y);
     64                 SkScalar dist = SkPoint::Length(px - cx, py - cy);
     65                 if (dist <= rad && !*ptr) {
     66                     flatc++;
     67                     *ptr = fInsideColor;
     68                 } else if (dist > rad && *ptr) {
     69                     buldgec++;
     70                     *ptr = fOutsideColor;
     71                 }
     72             }
     73         }
     74         if (flatCount) *flatCount = flatc;
     75         if (buldgeCount) *buldgeCount = buldgec;
     76         return flatc + buldgec;
     77     }
     78 
     79     virtual void onDrawContent(SkCanvas* canvas) {
     80         this->drawOval();
     81         int flatCount, buldgeCount;
     82         this->checkOval(&flatCount, &buldgeCount);
     83         this->inval(NULL);
     84 
     85         canvas->drawBitmap(fBitmap, SkIntToScalar(20), SkIntToScalar(20), NULL);
     86 
     87 
     88         static int gFlatCount;
     89         static int gBuldgeCount;
     90         gFlatCount += flatCount;
     91         gBuldgeCount += buldgeCount;
     92 
     93         if (fSize.fWidth < kLimit) {
     94             SkDebugf("--- width=%g, flat=%d buldge=%d total: flat=%d buldge=%d\n", fSize.fWidth,
     95                      flatCount, buldgeCount, gFlatCount, gBuldgeCount);
     96             fSize.fWidth += SK_Scalar1;
     97             fSize.fHeight += SK_Scalar1;
     98         } else {
     99          //   fSize.set(SK_Scalar1, SK_Scalar1);
    100         }
    101     }
    102 
    103     virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) SK_OVERRIDE {
    104         this->inval(NULL);
    105         return NULL;
    106     }
    107 
    108 private:
    109     typedef SampleView INHERITED;
    110 };
    111 
    112 ///////////////////////////////////////////////////////////////////////////////
    113 
    114 static SkView* MyFactory() { return new OvalTestView; }
    115 static SkViewRegister reg(MyFactory);
    116