278dc6929b
Review URL: http://codereview.appspot.com/5649083/ git-svn-id: http://skia.googlecode.com/svn/trunk@3198 2bbb7eff-a529-9590-31e7-b0007b416f81
199 lines
7.8 KiB
C++
199 lines
7.8 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 "gm.h"
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#include "SkRandom.h"
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#include "SkTArray.h"
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namespace skiagm {
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class ConvexPathsGM : public GM {
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public:
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ConvexPathsGM() {
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this->setBGColor(0xFF000000);
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this->makePaths();
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}
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protected:
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virtual SkString onShortName() {
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return SkString("convexpaths");
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}
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virtual SkISize onISize() {
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return make_isize(1200, 900);
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}
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void makePaths() {
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// CW
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fPaths.push_back().moveTo(0, 0);
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fPaths.back().quadTo(50 * SK_Scalar1, 100 * SK_Scalar1,
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0, 100 * SK_Scalar1);
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fPaths.back().lineTo(0, 0);
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// CCW
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fPaths.push_back().moveTo(0, 0);
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fPaths.back().lineTo(0, 100 * SK_Scalar1);
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fPaths.back().quadTo(50 * SK_Scalar1, 100 * SK_Scalar1,
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0, 0);
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// CW
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fPaths.push_back().moveTo(0, 50 * SK_Scalar1);
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fPaths.back().quadTo(50 * SK_Scalar1, 0,
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100 * SK_Scalar1, 50 * SK_Scalar1);
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fPaths.back().quadTo(50 * SK_Scalar1, 100 * SK_Scalar1,
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0, 50 * SK_Scalar1);
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// CCW
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fPaths.push_back().moveTo(0, 50 * SK_Scalar1);
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fPaths.back().quadTo(50 * SK_Scalar1, 100 * SK_Scalar1,
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100 * SK_Scalar1, 50 * SK_Scalar1);
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fPaths.back().quadTo(50 * SK_Scalar1, 0,
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0, 50 * SK_Scalar1);
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fPaths.push_back().addRect(0, 0,
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100 * SK_Scalar1, 100 * SK_Scalar1,
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SkPath::kCW_Direction);
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fPaths.push_back().addRect(0, 0,
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100 * SK_Scalar1, 100 * SK_Scalar1,
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SkPath::kCCW_Direction);
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fPaths.push_back().addCircle(50 * SK_Scalar1, 50 * SK_Scalar1,
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50 * SK_Scalar1, SkPath::kCW_Direction);
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fPaths.push_back().addCircle(50 * SK_Scalar1, 50 * SK_Scalar1,
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40 * SK_Scalar1, SkPath::kCCW_Direction);
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fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
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50 * SK_Scalar1,
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100 * SK_Scalar1),
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SkPath::kCW_Direction);
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fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
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100 * SK_Scalar1,
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50 * SK_Scalar1),
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SkPath::kCCW_Direction);
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fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
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100 * SK_Scalar1,
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5 * SK_Scalar1),
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SkPath::kCCW_Direction);
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fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
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SK_Scalar1,
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100 * SK_Scalar1),
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SkPath::kCCW_Direction);
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fPaths.push_back().addRoundRect(SkRect::MakeXYWH(0, 0,
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SK_Scalar1 * 100,
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SK_Scalar1 * 100),
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40 * SK_Scalar1, 20 * SK_Scalar1,
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SkPath::kCW_Direction);
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fPaths.push_back().addRoundRect(SkRect::MakeXYWH(0, 0,
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SK_Scalar1 * 100,
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SK_Scalar1 * 100),
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20 * SK_Scalar1, 40 * SK_Scalar1,
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SkPath::kCCW_Direction);
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// shallow diagonals
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fPaths.push_back().lineTo(100 * SK_Scalar1, SK_Scalar1);
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fPaths.back().lineTo(98 * SK_Scalar1, 100 * SK_Scalar1);
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fPaths.back().lineTo(3 * SK_Scalar1, 96 * SK_Scalar1);
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/*
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It turns out arcTos are not automatically marked as convex and they
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may in fact be ever so slightly concave.
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fPaths.push_back().arcTo(SkRect::MakeXYWH(0, 0,
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50 * SK_Scalar1,
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100 * SK_Scalar1),
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25 * SK_Scalar1, 130 * SK_Scalar1, false);
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*/
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// cubics
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fPaths.push_back().cubicTo( 1 * SK_Scalar1, 1 * SK_Scalar1,
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10 * SK_Scalar1, 90 * SK_Scalar1,
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0 * SK_Scalar1, 100 * SK_Scalar1);
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fPaths.push_back().cubicTo(100 * SK_Scalar1, 50 * SK_Scalar1,
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20 * SK_Scalar1, 100 * SK_Scalar1,
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0 * SK_Scalar1, 0 * SK_Scalar1);
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// triangle where one edge is a degenerate quad
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fPaths.push_back().moveTo(SkFloatToScalar(8.59375f), 45 * SK_Scalar1);
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fPaths.back().quadTo(SkFloatToScalar(16.9921875f), 45 * SK_Scalar1,
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SkFloatToScalar(31.25f), 45 * SK_Scalar1);
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fPaths.back().lineTo(100 * SK_Scalar1, 100 * SK_Scalar1);
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fPaths.back().lineTo(SkFloatToScalar(8.59375f), 45 * SK_Scalar1);
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// point degenerate
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fPaths.push_back().moveTo(50 * SK_Scalar1, 50 * SK_Scalar1);
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fPaths.back().lineTo(50 * SK_Scalar1, 50 * SK_Scalar1);
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fPaths.push_back().moveTo(50 * SK_Scalar1, 50 * SK_Scalar1);
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fPaths.back().quadTo(50 * SK_Scalar1, 50 * SK_Scalar1,
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50 * SK_Scalar1, 50 * SK_Scalar1);
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fPaths.push_back().moveTo(50 * SK_Scalar1, 50 * SK_Scalar1);
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fPaths.back().cubicTo(50 * SK_Scalar1, 50 * SK_Scalar1,
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50 * SK_Scalar1, 50 * SK_Scalar1,
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50 * SK_Scalar1, 50 * SK_Scalar1);
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// moveTo only paths
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fPaths.push_back().moveTo(0, 0);
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fPaths.back().moveTo(0, 0);
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fPaths.back().moveTo(SK_Scalar1, SK_Scalar1);
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fPaths.back().moveTo(SK_Scalar1, SK_Scalar1);
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fPaths.back().moveTo(10 * SK_Scalar1, 10 * SK_Scalar1);
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fPaths.push_back().moveTo(0, 0);
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fPaths.back().moveTo(0, 0);
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// line degenerate
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fPaths.push_back().lineTo(100 * SK_Scalar1, 100 * SK_Scalar1);
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fPaths.push_back().quadTo(100 * SK_Scalar1, 100 * SK_Scalar1, 0, 0);
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fPaths.push_back().quadTo(100 * SK_Scalar1, 100 * SK_Scalar1,
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50 * SK_Scalar1, 50 * SK_Scalar1);
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fPaths.push_back().quadTo(50 * SK_Scalar1, 50 * SK_Scalar1,
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100 * SK_Scalar1, 100 * SK_Scalar1);
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fPaths.push_back().cubicTo(0, 0,
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0, 0,
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100 * SK_Scalar1, 100 * SK_Scalar1);
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}
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virtual void onDraw(SkCanvas* canvas) {
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SkPaint paint;
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paint.setAntiAlias(true);
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SkRandom rand;
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canvas->translate(20 * SK_Scalar1, 20 * SK_Scalar1);
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for (int i = 0; i < fPaths.count(); ++i) {
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canvas->save();
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// position the path, and make it at off-integer coords.
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canvas->translate(SK_Scalar1 * 200 * (i % 5) + SK_Scalar1 / 4,
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SK_Scalar1 * 200 * (i / 5) + 3 * SK_Scalar1 / 4);
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SkColor color = rand.nextU();
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color |= 0xff000000;
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paint.setColor(color);
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SkASSERT(fPaths[i].isConvex());
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canvas->drawPath(fPaths[i], paint);
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canvas->restore();
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}
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}
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private:
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typedef GM INHERITED;
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SkTArray<SkPath> fPaths;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new ConvexPathsGM; }
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static GMRegistry reg(MyFactory);
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}
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