c3bd8af6d5
fix reference to SkBaseDevice, which was only a problem in no-gpu build This reverts commit 4fa44a6bf73891b21917fb90d02beef9143bffa3. R=reed@google.com Author: reed@chromium.org Review URL: https://codereview.chromium.org/163603003 git-svn-id: http://skia.googlecode.com/svn/trunk@13432 2bbb7eff-a529-9590-31e7-b0007b416f81
128 lines
3.6 KiB
C++
128 lines
3.6 KiB
C++
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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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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#include "SkDevice.h"
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#include "SkPaint.h"
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// ensure that we don't accidentally screw up the bounds when the oval is
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// fractional, and the impl computes the center and radii, and uses them to
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// reconstruct the edges of the circle.
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// see bug# 1504910
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static void test_circlebounds(SkCanvas*) {
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SkRect r = { 1.39999998f, 1, 21.3999996f, 21 };
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SkPath p;
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p.addOval(r);
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SkASSERT(r == p.getBounds());
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}
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class CircleView : public SampleView {
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public:
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static const SkScalar ANIM_DX;
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static const SkScalar ANIM_DY;
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static const SkScalar ANIM_RAD;
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SkScalar fDX, fDY, fRAD;
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CircleView() {
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fDX = fDY = fRAD = 0;
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fN = 3;
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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, "Circles");
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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 circle(SkCanvas* canvas, int width, bool aa) {
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SkPaint paint;
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paint.setAntiAlias(aa);
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if (width < 0) {
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paint.setStyle(SkPaint::kFill_Style);
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} else {
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(SkIntToScalar(width));
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}
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canvas->drawCircle(0, 0, SkIntToScalar(9) + fRAD, paint);
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if (false) { // avoid bit rot, suppress warning
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test_circlebounds(canvas);
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}
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}
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void drawSix(SkCanvas* canvas, SkScalar dx, SkScalar dy) {
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for (int width = -1; width <= 1; width++) {
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canvas->save();
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circle(canvas, width, false);
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canvas->translate(0, dy);
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circle(canvas, width, true);
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canvas->restore();
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canvas->translate(dx, 0);
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}
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}
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static void make_poly(SkPath* path, int n) {
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if (n <= 0) {
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return;
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}
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path->incReserve(n + 1);
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path->moveTo(SK_Scalar1, 0);
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SkScalar step = SK_ScalarPI * 2 / n;
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SkScalar angle = 0;
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for (int i = 1; i < n; i++) {
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angle += step;
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SkScalar c, s = SkScalarSinCos(angle, &c);
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path->lineTo(c, s);
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}
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path->close();
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}
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static void rotate(SkCanvas* canvas, SkScalar angle, SkScalar px, SkScalar py) {
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canvas->translate(-px, -py);
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canvas->rotate(angle);
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canvas->translate(px, py);
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}
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virtual void onDrawContent(SkCanvas* canvas) {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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// canvas->drawCircle(250, 250, 220, paint);
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SkMatrix matrix;
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matrix.setScale(SkIntToScalar(100), SkIntToScalar(100));
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matrix.postTranslate(SkIntToScalar(200), SkIntToScalar(200));
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canvas->concat(matrix);
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for (int n = 3; n < 20; n++) {
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SkPath path;
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make_poly(&path, n);
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SkAutoCanvasRestore acr(canvas, true);
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canvas->rotate(SkIntToScalar(10) * (n - 3));
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canvas->translate(-SK_Scalar1, 0);
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canvas->drawPath(path, paint);
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}
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}
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private:
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int fN;
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typedef SampleView INHERITED;
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};
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const SkScalar CircleView::ANIM_DX(SK_Scalar1 / 67);
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const SkScalar CircleView::ANIM_DY(SK_Scalar1 / 29);
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const SkScalar CircleView::ANIM_RAD(SK_Scalar1 / 19);
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new CircleView; }
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static SkViewRegister reg(MyFactory);
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