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skia2/gm/degeneratesegments.cpp
Ben Wagner 7fde8e1728 IWYU for gms. 
This almost gets gms to be iwyu clean. The last bit is around gm.cpp
and the tracing framework and its use of atomic. Will also need a way
of keeping things from regressing, which is difficult due to needing to
do this outside-in.

Change-Id: I1393531e99da8b0f1a29f55c53c86d53f459af7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211593
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2019-05-02 17:48:53 +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/SkFont.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "include/utils/SkRandom.h"
#include "tools/ToolUtils.h"
namespace skiagm {
class DegenerateSegmentsGM : public GM {
public:
DegenerateSegmentsGM() {}
protected:
struct PathAndName {
SkPath fPath;
const char* fName1;
const char* fName2;
};
SkString onShortName() {
return SkString("degeneratesegments");
}
SkISize onISize() { return SkISize::Make(896, 930); }
typedef SkPoint (*AddSegmentFunc)(SkPath&, SkPoint&);
// We need to use explicit commands here, instead of addPath, because we
// do not want the moveTo that is added at the beginning of a path to
// appear in the appended path.
static SkPoint AddMove(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
path.moveTo(moveToPt);
return moveToPt;
}
static SkPoint AddMoveClose(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
path.moveTo(moveToPt);
path.close();
return moveToPt;
}
static SkPoint AddDegenLine(SkPath& path, SkPoint& startPt) {
path.lineTo(startPt);
return startPt;
}
static SkPoint AddMoveDegenLine(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
path.moveTo(moveToPt);
path.lineTo(moveToPt);
return moveToPt;
}
static SkPoint AddMoveDegenLineClose(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
path.moveTo(moveToPt);
path.lineTo(moveToPt);
path.close();
return moveToPt;
}
static SkPoint AddDegenQuad(SkPath& path, SkPoint& startPt) {
path.quadTo(startPt, startPt);
return startPt;
}
static SkPoint AddMoveDegenQuad(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
path.moveTo(moveToPt);
path.quadTo(moveToPt, moveToPt);
return moveToPt;
}
static SkPoint AddMoveDegenQuadClose(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
path.moveTo(moveToPt);
path.quadTo(moveToPt, moveToPt);
path.close();
return moveToPt;
}
static SkPoint AddDegenCubic(SkPath& path, SkPoint& startPt) {
path.cubicTo(startPt, startPt, startPt);
return startPt;
}
static SkPoint AddMoveDegenCubic(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
path.moveTo(moveToPt);
path.cubicTo(moveToPt, moveToPt, moveToPt);
return moveToPt;
}
static SkPoint AddMoveDegenCubicClose(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
path.moveTo(moveToPt);
path.cubicTo(moveToPt, moveToPt, moveToPt);
path.close();
return moveToPt;
}
static SkPoint AddClose(SkPath& path, SkPoint& startPt) {
path.close();
return startPt;
}
static SkPoint AddLine(SkPath& path, SkPoint& startPt) {
SkPoint endPt = startPt + SkPoint::Make(40*SK_Scalar1, 0);
path.lineTo(endPt);
return endPt;
}
static SkPoint AddMoveLine(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
SkPoint endPt = moveToPt + SkPoint::Make(40*SK_Scalar1, 0);
path.moveTo(moveToPt);
path.lineTo(endPt);
return endPt;
}
static SkPoint AddMoveLineClose(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
SkPoint endPt = moveToPt + SkPoint::Make(40*SK_Scalar1, 0);
path.moveTo(moveToPt);
path.lineTo(endPt);
path.close();
return endPt;
}
static SkPoint AddQuad(SkPath& path, SkPoint& startPt) {
SkPoint midPt = startPt + SkPoint::Make(20*SK_Scalar1, 5*SK_Scalar1);
SkPoint endPt = startPt + SkPoint::Make(40*SK_Scalar1, 0);
path.quadTo(midPt, endPt);
return endPt;
}
static SkPoint AddMoveQuad(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
SkPoint midPt = moveToPt + SkPoint::Make(20*SK_Scalar1, 5*SK_Scalar1);
SkPoint endPt = moveToPt + SkPoint::Make(40*SK_Scalar1, 0);
path.moveTo(moveToPt);
path.quadTo(midPt, endPt);
return endPt;
}
static SkPoint AddMoveQuadClose(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
SkPoint midPt = moveToPt + SkPoint::Make(20*SK_Scalar1, 5*SK_Scalar1);
SkPoint endPt = moveToPt + SkPoint::Make(40*SK_Scalar1, 0);
path.moveTo(moveToPt);
path.quadTo(midPt, endPt);
path.close();
return endPt;
}
static SkPoint AddCubic(SkPath& path, SkPoint& startPt) {
SkPoint t1Pt = startPt + SkPoint::Make(15*SK_Scalar1, 5*SK_Scalar1);
SkPoint t2Pt = startPt + SkPoint::Make(25*SK_Scalar1, 5*SK_Scalar1);
SkPoint endPt = startPt + SkPoint::Make(40*SK_Scalar1, 0);
path.cubicTo(t1Pt, t2Pt, endPt);
return endPt;
}
static SkPoint AddMoveCubic(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
SkPoint t1Pt = moveToPt + SkPoint::Make(15*SK_Scalar1, 5*SK_Scalar1);
SkPoint t2Pt = moveToPt + SkPoint::Make(25*SK_Scalar1, 5*SK_Scalar1);
SkPoint endPt = moveToPt + SkPoint::Make(40*SK_Scalar1, 0);
path.moveTo(moveToPt);
path.cubicTo(t1Pt, t2Pt, endPt);
return endPt;
}
static SkPoint AddMoveCubicClose(SkPath& path, SkPoint& startPt) {
SkPoint moveToPt = startPt + SkPoint::Make(0, 10*SK_Scalar1);
SkPoint t1Pt = moveToPt + SkPoint::Make(15*SK_Scalar1, 5*SK_Scalar1);
SkPoint t2Pt = moveToPt + SkPoint::Make(25*SK_Scalar1, 5*SK_Scalar1);
SkPoint endPt = moveToPt + SkPoint::Make(40*SK_Scalar1, 0);
path.moveTo(moveToPt);
path.cubicTo(t1Pt, t2Pt, endPt);
path.close();
return endPt;
}
void drawPath(SkPath& path, SkCanvas* canvas, SkColor color,
const SkRect& clip, SkPaint::Cap cap, SkPaint::Join join,
SkPaint::Style style, SkPath::FillType fill,
SkScalar strokeWidth) {
path.setFillType(fill);
SkPaint paint;
paint.setStrokeCap(cap);
paint.setStrokeWidth(strokeWidth);
paint.setStrokeJoin(join);
paint.setColor(color);
paint.setStyle(style);
canvas->save();
canvas->clipRect(clip);
canvas->drawPath(path, paint);
canvas->restore();
}
virtual void onDraw(SkCanvas* canvas) {
constexpr AddSegmentFunc gSegmentFunctions[] = {
AddMove,
AddMoveClose,
AddDegenLine,
AddMoveDegenLine,
AddMoveDegenLineClose,
AddDegenQuad,
AddMoveDegenQuad,
AddMoveDegenQuadClose,
AddDegenCubic,
AddMoveDegenCubic,
AddMoveDegenCubicClose,
AddClose,
AddLine,
AddMoveLine,
AddMoveLineClose,
AddQuad,
AddMoveQuad,
AddMoveQuadClose,
AddCubic,
AddMoveCubic,
AddMoveCubicClose
};
const char* gSegmentNames[] = {
"Move",
"MoveClose",
"DegenLine",
"MoveDegenLine",
"MoveDegenLineClose",
"DegenQuad",
"MoveDegenQuad",
"MoveDegenQuadClose",
"DegenCubic",
"MoveDegenCubic",
"MoveDegenCubicClose",
"Close",
"Line",
"MoveLine",
"MoveLineClose",
"Quad",
"MoveQuad",
"MoveQuadClose",
"Cubic",
"MoveCubic",
"MoveCubicClose"
};
struct FillAndName {
SkPath::FillType fFill;
const char* fName;
};
constexpr FillAndName gFills[] = {
{SkPath::kWinding_FillType, "Winding"},
{SkPath::kEvenOdd_FillType, "Even / Odd"},
{SkPath::kInverseWinding_FillType, "Inverse Winding"},
{SkPath::kInverseEvenOdd_FillType, "Inverse Even / Odd"}
};
struct StyleAndName {
SkPaint::Style fStyle;
const char* fName;
};
constexpr StyleAndName gStyles[] = {
{SkPaint::kFill_Style, "Fill"},
{SkPaint::kStroke_Style, "Stroke 10"},
{SkPaint::kStrokeAndFill_Style, "Stroke 10 And Fill"}
};
struct CapAndName {
SkPaint::Cap fCap;
SkPaint::Join fJoin;
const char* fName;
};
constexpr CapAndName gCaps[] = {
{SkPaint::kButt_Cap, SkPaint::kBevel_Join, "Butt"},
{SkPaint::kRound_Cap, SkPaint::kRound_Join, "Round"},
{SkPaint::kSquare_Cap, SkPaint::kBevel_Join, "Square"}
};
SkPaint titlePaint;
titlePaint.setColor(SK_ColorBLACK);
titlePaint.setAntiAlias(true);
SkFont font(ToolUtils::create_portable_typeface(), 15);
const char title[] = "Random Paths Drawn Into Rectangle Clips With "
"Indicated Style, Fill and Linecaps, "
"with Stroke width 6";
canvas->drawString(title, 20, 20, font, titlePaint);
SkRandom rand;
SkRect rect = SkRect::MakeWH(220*SK_Scalar1, 50*SK_Scalar1);
canvas->save();
canvas->translate(2*SK_Scalar1, 30 * SK_Scalar1); // The title
canvas->save();
unsigned numSegments = SK_ARRAY_COUNT(gSegmentFunctions);
unsigned numCaps = SK_ARRAY_COUNT(gCaps);
unsigned numStyles = SK_ARRAY_COUNT(gStyles);
unsigned numFills = SK_ARRAY_COUNT(gFills);
for (size_t row = 0; row < 6; ++row) {
if (0 < row) {
canvas->translate(0, rect.height() + 100*SK_Scalar1);
}
canvas->save();
for (size_t column = 0; column < 4; ++column) {
if (0 < column) {
canvas->translate(rect.width() + 4*SK_Scalar1, 0);
}
SkColor color = ToolUtils::color_to_565(0xff007000);
StyleAndName style = gStyles[(rand.nextU() >> 16) % numStyles];
CapAndName cap = gCaps[(rand.nextU() >> 16) % numCaps];
FillAndName fill = gFills[(rand.nextU() >> 16) % numFills];
SkPath path;
unsigned s1 = (rand.nextU() >> 16) % numSegments;
unsigned s2 = (rand.nextU() >> 16) % numSegments;
unsigned s3 = (rand.nextU() >> 16) % numSegments;
unsigned s4 = (rand.nextU() >> 16) % numSegments;
unsigned s5 = (rand.nextU() >> 16) % numSegments;
SkPoint pt = SkPoint::Make(10*SK_Scalar1, 0);
pt = gSegmentFunctions[s1](path, pt);
pt = gSegmentFunctions[s2](path, pt);
pt = gSegmentFunctions[s3](path, pt);
pt = gSegmentFunctions[s4](path, pt);
pt = gSegmentFunctions[s5](path, pt);
this->drawPath(path, canvas, color, rect,
cap.fCap, cap.fJoin, style.fStyle,
fill.fFill, SK_Scalar1*6);
SkPaint rectPaint;
rectPaint.setColor(SK_ColorBLACK);
rectPaint.setStyle(SkPaint::kStroke_Style);
rectPaint.setStrokeWidth(-1);
rectPaint.setAntiAlias(true);
canvas->drawRect(rect, rectPaint);
SkPaint labelPaint;
labelPaint.setColor(color);
labelPaint.setAntiAlias(true);
font.setSize(10);
canvas->drawString(style.fName, 0, rect.height() + 12, font, labelPaint);
canvas->drawString(fill.fName, 0, rect.height() + 24, font, labelPaint);
canvas->drawString(cap.fName, 0, rect.height() + 36, font, labelPaint);
canvas->drawString(gSegmentNames[s1], 0, rect.height() + 48, font, labelPaint);
canvas->drawString(gSegmentNames[s2], 0, rect.height() + 60, font, labelPaint);
canvas->drawString(gSegmentNames[s3], 0, rect.height() + 72, font, labelPaint);
canvas->drawString(gSegmentNames[s4], 0, rect.height() + 84, font, labelPaint);
canvas->drawString(gSegmentNames[s5], 0, rect.height() + 96, font, labelPaint);
}
canvas->restore();
}
canvas->restore();
canvas->restore();
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM( return new DegenerateSegmentsGM; )
}
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