115 lines
3.3 KiB
C++
115 lines
3.3 KiB
C++
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#include "SampleCode.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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static const int kILimit = 101;
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static const SkScalar kLimit = SK_Scalar1 * kILimit;
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class OvalTestView : public SkView {
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public:
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SkSize fSize;
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SkPMColor fInsideColor; // signals an interior pixel that was not set
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SkPMColor fOutsideColor; // signals an exterior pixels that was set
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SkBitmap fBitmap;
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OvalTestView() {
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fSize.set(SK_Scalar1, SK_Scalar1);
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fBitmap.setConfig(SkBitmap::kARGB_8888_Config, kILimit, kILimit);
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fBitmap.allocPixels();
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fInsideColor = SkPreMultiplyColor(SK_ColorRED);
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fOutsideColor = SkPreMultiplyColor(SK_ColorGREEN);
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}
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protected:
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "OvalTest");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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void drawBG(SkCanvas* canvas) {
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canvas->drawColor(0xFFDDDDDD);
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}
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void drawOval() {
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SkCanvas canvas(fBitmap);
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SkPaint p;
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fBitmap.eraseColor(0);
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canvas.drawOval(SkRect::MakeSize(fSize), p);
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}
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int checkOval(int* flatCount, int* buldgeCount) {
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int flatc = 0;
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int buldgec = 0;
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const SkScalar rad = SkScalarHalf(fSize.width());
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SkScalar cx = SkScalarHalf(fSize.width());
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SkScalar cy = SkScalarHalf(fSize.height());
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for (int y = 0; y < kILimit; y++) {
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for (int x = 0; x < kILimit; x++) {
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// measure from pixel centers
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SkScalar px = SkIntToScalar(x) + SK_ScalarHalf;
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SkScalar py = SkIntToScalar(y) + SK_ScalarHalf;
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SkPMColor* ptr = fBitmap.getAddr32(x, y);
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SkScalar dist = SkPoint::Length(px - cx, py - cy);
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if (dist <= rad && !*ptr) {
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flatc++;
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*ptr = fInsideColor;
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} else if (dist > rad && *ptr) {
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buldgec++;
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*ptr = fOutsideColor;
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}
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}
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}
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if (flatCount) *flatCount = flatc;
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if (buldgeCount) *buldgeCount = buldgec;
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return flatc + buldgec;
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}
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virtual void onDraw(SkCanvas* canvas) {
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this->drawBG(canvas);
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this->drawOval();
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int flatCount, buldgeCount;
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this->checkOval(&flatCount, &buldgeCount);
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this->inval(NULL);
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canvas->drawBitmap(fBitmap, SkIntToScalar(20), SkIntToScalar(20), NULL);
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static int gFlatCount;
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static int gBuldgeCount;
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gFlatCount += flatCount;
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gBuldgeCount += buldgeCount;
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if (fSize.fWidth < kLimit) {
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SkDebugf("--- width=%g, flat=%d buldge=%d total: flat=%d buldge=%d\n", fSize.fWidth,
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flatCount, buldgeCount, gFlatCount, gBuldgeCount);
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fSize.fWidth += SK_Scalar1;
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fSize.fHeight += SK_Scalar1;
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} else {
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// fSize.set(SK_Scalar1, SK_Scalar1);
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}
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}
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virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
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this->inval(NULL);
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return NULL;
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}
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private:
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typedef SkView INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new OvalTestView; }
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static SkViewRegister reg(MyFactory);
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