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skia2/gm/convexpaths.cpp
Mike Reed 30bc527fd6 Revert "Reland "Revert "Use flat version of path-direction enum""" 
This reverts commit 7cda6f3743.

Reason for revert: legacy convexity code removed -- google3 should be ok

Original change's description:
> Reland "Revert "Use flat version of path-direction enum""
>
> This reverts commit 1792b19485.
>
> Reason for revert: need to update legacy_convexity, still used by google3
>
> Original change's description:
> > Revert "Revert "Use flat version of path-direction enum""
> >
> > This reverts commit 0dacc6b7d3.
> >
> > Change-Id: Ie103e9f36b07e4ee256a3688a4decf3a6dd74314
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/255832
> > Auto-Submit: Mike Reed <reed@google.com>
> > Reviewed-by: Mike Reed <reed@google.com>
> > Commit-Queue: Mike Reed <reed@google.com>
>
> TBR=reed@google.com
>
> Change-Id: I0ecea0eb8a237298c6b908cc4bfd1cacdfc5b900
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/255976
> Reviewed-by: Mike Reed <reed@google.com>
> Commit-Queue: Mike Reed <reed@google.com>

TBR=reed@google.com

Change-Id: I3529139bb391c4f62ce5cd0744cdf38a13b71d78
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/255984
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
2019-11-22 19:09:54 +00:00

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/*
* 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 "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTypes.h"
#include "include/private/SkNoncopyable.h"
#include "include/private/SkTArray.h"
#include "include/utils/SkRandom.h"
namespace {
class SkDoOnce : SkNoncopyable {
public:
SkDoOnce() { fDidOnce = false; }
bool needToDo() const { return !fDidOnce; }
bool alreadyDone() const { return fDidOnce; }
void accomplished() {
SkASSERT(!fDidOnce);
fDidOnce = true;
}
private:
bool fDidOnce;
};
class ConvexPathsGM : public skiagm::GM {
SkDoOnce fOnce;
void onOnceBeforeDraw() override { this->setBGColor(0xFF000000); }
SkString onShortName() override { return SkString("convexpaths"); }
SkISize onISize() override { return {1200, 1100}; }
void makePaths() {
if (fOnce.alreadyDone()) {
return;
}
fOnce.accomplished();
fPaths.push_back().moveTo(0, 0);
fPaths.back().quadTo(50 * SK_Scalar1, 100 * SK_Scalar1,
0, 100 * SK_Scalar1);
fPaths.back().lineTo(0, 0);
fPaths.push_back().moveTo(0, 50 * SK_Scalar1);
fPaths.back().quadTo(50 * SK_Scalar1, 0,
100 * SK_Scalar1, 50 * SK_Scalar1);
fPaths.back().quadTo(50 * SK_Scalar1, 100 * SK_Scalar1,
0, 50 * SK_Scalar1);
fPaths.push_back().addRect(0, 0,
100 * SK_Scalar1, 100 * SK_Scalar1,
SkPathDirection::kCW);
fPaths.push_back().addRect(0, 0,
100 * SK_Scalar1, 100 * SK_Scalar1,
SkPathDirection::kCCW);
fPaths.push_back().addCircle(50 * SK_Scalar1, 50 * SK_Scalar1,
50 * SK_Scalar1, SkPathDirection::kCW);
fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
50 * SK_Scalar1,
100 * SK_Scalar1),
SkPathDirection::kCW);
fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
100 * SK_Scalar1,
5 * SK_Scalar1),
SkPathDirection::kCCW);
fPaths.push_back().addOval(SkRect::MakeXYWH(0, 0,
SK_Scalar1,
100 * SK_Scalar1),
SkPathDirection::kCCW);
fPaths.push_back().addRoundRect(SkRect::MakeXYWH(0, 0,
SK_Scalar1 * 100,
SK_Scalar1 * 100),
40 * SK_Scalar1, 20 * SK_Scalar1,
SkPathDirection::kCW);
// large number of points
enum {
kLength = 100,
kPtsPerSide = (1 << 12),
};
fPaths.push_back().moveTo(0, 0);
for (int i = 1; i < kPtsPerSide; ++i) { // skip the first point due to moveTo.
fPaths.back().lineTo(kLength * SkIntToScalar(i) / kPtsPerSide, 0);
}
for (int i = 0; i < kPtsPerSide; ++i) {
fPaths.back().lineTo(kLength, kLength * SkIntToScalar(i) / kPtsPerSide);
}
for (int i = kPtsPerSide; i > 0; --i) {
fPaths.back().lineTo(kLength * SkIntToScalar(i) / kPtsPerSide, kLength);
}
for (int i = kPtsPerSide; i > 0; --i) {
fPaths.back().lineTo(0, kLength * SkIntToScalar(i) / kPtsPerSide);
}
// shallow diagonals
fPaths.push_back().lineTo(100 * SK_Scalar1, SK_Scalar1);
fPaths.back().lineTo(98 * SK_Scalar1, 100 * SK_Scalar1);
fPaths.back().lineTo(3 * SK_Scalar1, 96 * SK_Scalar1);
fPaths.push_back().arcTo(SkRect::MakeXYWH(0, 0,
50 * SK_Scalar1,
100 * SK_Scalar1),
25 * SK_Scalar1, 130 * SK_Scalar1, false);
// cubics
fPaths.push_back().cubicTo( 1 * SK_Scalar1, 1 * SK_Scalar1,
10 * SK_Scalar1, 90 * SK_Scalar1,
0 * SK_Scalar1, 100 * SK_Scalar1);
fPaths.push_back().cubicTo(100 * SK_Scalar1, 50 * SK_Scalar1,
20 * SK_Scalar1, 100 * SK_Scalar1,
0 * SK_Scalar1, 0 * SK_Scalar1);
// path that has a cubic with a repeated first control point and
// a repeated last control point.
fPaths.push_back().moveTo(SK_Scalar1 * 10, SK_Scalar1 * 10);
fPaths.back().cubicTo(10 * SK_Scalar1, 10 * SK_Scalar1,
10 * SK_Scalar1, 0,
20 * SK_Scalar1, 0);
fPaths.back().lineTo(40 * SK_Scalar1, 0);
fPaths.back().cubicTo(40 * SK_Scalar1, 0,
50 * SK_Scalar1, 0,
50 * SK_Scalar1, 10 * SK_Scalar1);
// path that has two cubics with repeated middle control points.
fPaths.push_back().moveTo(SK_Scalar1 * 10, SK_Scalar1 * 10);
fPaths.back().cubicTo(10 * SK_Scalar1, 0,
10 * SK_Scalar1, 0,
20 * SK_Scalar1, 0);
fPaths.back().lineTo(40 * SK_Scalar1, 0);
fPaths.back().cubicTo(50 * SK_Scalar1, 0,
50 * SK_Scalar1, 0,
50 * SK_Scalar1, 10 * SK_Scalar1);
// cubic where last three points are almost a line
fPaths.push_back().moveTo(0, 228 * SK_Scalar1 / 8);
fPaths.back().cubicTo(628 * SK_Scalar1 / 8, 82 * SK_Scalar1 / 8,
1255 * SK_Scalar1 / 8, 141 * SK_Scalar1 / 8,
1883 * SK_Scalar1 / 8, 202 * SK_Scalar1 / 8);
// flat cubic where the at end point tangents both point outward.
fPaths.push_back().moveTo(10 * SK_Scalar1, 0);
fPaths.back().cubicTo(0, SK_Scalar1,
30 * SK_Scalar1, SK_Scalar1,
20 * SK_Scalar1, 0);
// flat cubic where initial tangent is in, end tangent out
fPaths.push_back().moveTo(0, 0 * SK_Scalar1);
fPaths.back().cubicTo(10 * SK_Scalar1, SK_Scalar1,
30 * SK_Scalar1, SK_Scalar1,
20 * SK_Scalar1, 0);
// flat cubic where initial tangent is out, end tangent in
fPaths.push_back().moveTo(10 * SK_Scalar1, 0);
fPaths.back().cubicTo(0, SK_Scalar1,
20 * SK_Scalar1, SK_Scalar1,
30 * SK_Scalar1, 0);
// triangle where one edge is a degenerate quad
fPaths.push_back().moveTo(8.59375f, 45 * SK_Scalar1);
fPaths.back().quadTo(16.9921875f, 45 * SK_Scalar1,
31.25f, 45 * SK_Scalar1);
fPaths.back().lineTo(100 * SK_Scalar1, 100 * SK_Scalar1);
fPaths.back().lineTo(8.59375f, 45 * SK_Scalar1);
// triangle where one edge is a quad with a repeated point
fPaths.push_back().moveTo(0, 25 * SK_Scalar1);
fPaths.back().lineTo(50 * SK_Scalar1, 0);
fPaths.back().quadTo(50 * SK_Scalar1, 50 * SK_Scalar1, 50 * SK_Scalar1, 50 * SK_Scalar1);
// triangle where one edge is a cubic with a 2x repeated point
fPaths.push_back().moveTo(0, 25 * SK_Scalar1);
fPaths.back().lineTo(50 * SK_Scalar1, 0);
fPaths.back().cubicTo(50 * SK_Scalar1, 0,
50 * SK_Scalar1, 50 * SK_Scalar1,
50 * SK_Scalar1, 50 * SK_Scalar1);
// triangle where one edge is a quad with a nearly repeated point
fPaths.push_back().moveTo(0, 25 * SK_Scalar1);
fPaths.back().lineTo(50 * SK_Scalar1, 0);
fPaths.back().quadTo(50 * SK_Scalar1, 49.95f,
50 * SK_Scalar1, 50 * SK_Scalar1);
// triangle where one edge is a cubic with a 3x nearly repeated point
fPaths.push_back().moveTo(0, 25 * SK_Scalar1);
fPaths.back().lineTo(50 * SK_Scalar1, 0);
fPaths.back().cubicTo(50 * SK_Scalar1, 49.95f,
50 * SK_Scalar1, 49.97f,
50 * SK_Scalar1, 50 * SK_Scalar1);
// triangle where there is a point degenerate cubic at one corner
fPaths.push_back().moveTo(0, 25 * SK_Scalar1);
fPaths.back().lineTo(50 * SK_Scalar1, 0);
fPaths.back().lineTo(50 * SK_Scalar1, 50 * SK_Scalar1);
fPaths.back().cubicTo(50 * SK_Scalar1, 50 * SK_Scalar1,
50 * SK_Scalar1, 50 * SK_Scalar1,
50 * SK_Scalar1, 50 * SK_Scalar1);
// point line
fPaths.push_back().moveTo(50 * SK_Scalar1, 50 * SK_Scalar1);
fPaths.back().lineTo(50 * SK_Scalar1, 50 * SK_Scalar1);
// point quad
fPaths.push_back().moveTo(50 * SK_Scalar1, 50 * SK_Scalar1);
fPaths.back().quadTo(50 * SK_Scalar1, 50 * SK_Scalar1,
50 * SK_Scalar1, 50 * SK_Scalar1);
// point cubic
fPaths.push_back().moveTo(50 * SK_Scalar1, 50 * SK_Scalar1);
fPaths.back().cubicTo(50 * SK_Scalar1, 50 * SK_Scalar1,
50 * SK_Scalar1, 50 * SK_Scalar1,
50 * SK_Scalar1, 50 * SK_Scalar1);
// moveTo only paths
fPaths.push_back().moveTo(0, 0);
fPaths.back().moveTo(0, 0);
fPaths.back().moveTo(SK_Scalar1, SK_Scalar1);
fPaths.back().moveTo(SK_Scalar1, SK_Scalar1);
fPaths.back().moveTo(10 * SK_Scalar1, 10 * SK_Scalar1);
fPaths.push_back().moveTo(0, 0);
fPaths.back().moveTo(0, 0);
// line degenerate
fPaths.push_back().lineTo(100 * SK_Scalar1, 100 * SK_Scalar1);
fPaths.push_back().quadTo(100 * SK_Scalar1, 100 * SK_Scalar1, 0, 0);
fPaths.push_back().quadTo(100 * SK_Scalar1, 100 * SK_Scalar1,
50 * SK_Scalar1, 50 * SK_Scalar1);
fPaths.push_back().quadTo(50 * SK_Scalar1, 50 * SK_Scalar1,
100 * SK_Scalar1, 100 * SK_Scalar1);
fPaths.push_back().cubicTo(0, 0,
0, 0,
100 * SK_Scalar1, 100 * SK_Scalar1);
// skbug.com/8928
fPaths.push_back().moveTo(16.875f, 192.594f);
fPaths.back().cubicTo(45.625f, 192.594f, 74.375f, 192.594f, 103.125f, 192.594f);
fPaths.back().cubicTo(88.75f, 167.708f, 74.375f, 142.823f, 60, 117.938f);
fPaths.back().cubicTo(45.625f, 142.823f, 31.25f, 167.708f, 16.875f, 192.594f);
fPaths.back().close();
SkMatrix m;
m.setAll(0.1f, 0, -1, 0, 0.115207f, -2.64977f, 0, 0, 1);
fPaths.back().transform(m);
// small circle. This is listed last so that it has device coords far
// from the origin (small area relative to x,y values).
fPaths.push_back().addCircle(0, 0, 1.2f);
}
void onDraw(SkCanvas* canvas) override {
this->makePaths();
SkPaint paint;
paint.setAntiAlias(true);
SkRandom rand;
canvas->translate(20 * SK_Scalar1, 20 * SK_Scalar1);
// As we've added more paths this has gotten pretty big. Scale the whole thing down.
canvas->scale(2 * SK_Scalar1 / 3, 2 * SK_Scalar1 / 3);
for (int i = 0; i < fPaths.count(); ++i) {
canvas->save();
// position the path, and make it at off-integer coords.
canvas->translate(SK_Scalar1 * 200 * (i % 5) + SK_Scalar1 / 10,
SK_Scalar1 * 200 * (i / 5) + 9 * SK_Scalar1 / 10);
SkColor color = rand.nextU();
color |= 0xff000000;
paint.setColor(color);
#if 0 // This hitting on 32bit Linux builds for some paths. Temporarily disabling while it is
// debugged.
SkASSERT(fPaths[i].isConvex());
#endif
canvas->drawPath(fPaths[i], paint);
canvas->restore();
}
}
SkTArray<SkPath> fPaths;
};
} // namespace
DEF_GM( return new ConvexPathsGM; )
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