dbfd7ab108
'static const' means, there must be at most one of these, and initialize it at compile time if possible or runtime if necessary. This leads to unexpected code execution, and TSAN* will complain about races on the guard variables. Generally 'constexpr' or 'const' are better choices. Neither can cause races: they're either intialized at compile time (constexpr) or intialized each time independently (const). This CL prefers constexpr where possible, and uses const where not. It even prefers constexpr over const where they don't make a difference... I want to have lots of examples of constexpr for people to see and mimic. The scoped-to-class static has nothing to do with any of this, and is not changed. * Not yet on the bots, which use an older TSAN. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2300623005 Review-Url: https://codereview.chromium.org/2300623005
211 lines
8.0 KiB
C++
211 lines
8.0 KiB
C++
/*
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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 "SkCanvas.h"
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//#include "SkParsePath.h"
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#include "SkPath.h"
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//#include "SkRandom.h"
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namespace skiagm {
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constexpr SkColor gPathColor = SK_ColorBLACK;
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constexpr SkColor gClipAColor = SK_ColorBLUE;
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constexpr SkColor gClipBColor = SK_ColorRED;
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class ComplexClipGM : public GM {
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public:
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ComplexClipGM(bool aaclip, bool saveLayer, bool invertDraw)
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: fDoAAClip(aaclip)
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, fDoSaveLayer(saveLayer)
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, fInvertDraw(invertDraw) {
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this->setBGColor(0xFFDEDFDE);
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}
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protected:
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SkString onShortName() {
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SkString str;
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str.printf("complexclip_%s%s%s",
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fDoAAClip ? "aa" : "bw",
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fDoSaveLayer ? "_layer" : "",
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fInvertDraw ? "_invert" : "");
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return str;
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}
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SkISize onISize() { return SkISize::Make(970, 780); }
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virtual void onDraw(SkCanvas* canvas) {
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SkPath path;
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path.moveTo(SkIntToScalar(0), SkIntToScalar(50));
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path.quadTo(SkIntToScalar(0), SkIntToScalar(0), SkIntToScalar(50), SkIntToScalar(0));
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path.lineTo(SkIntToScalar(175), SkIntToScalar(0));
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path.quadTo(SkIntToScalar(200), SkIntToScalar(0), SkIntToScalar(200), SkIntToScalar(25));
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path.lineTo(SkIntToScalar(200), SkIntToScalar(150));
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path.quadTo(SkIntToScalar(200), SkIntToScalar(200), SkIntToScalar(150), SkIntToScalar(200));
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path.lineTo(SkIntToScalar(0), SkIntToScalar(200));
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path.close();
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path.moveTo(SkIntToScalar(50), SkIntToScalar(50));
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path.lineTo(SkIntToScalar(150), SkIntToScalar(50));
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path.lineTo(SkIntToScalar(150), SkIntToScalar(125));
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path.quadTo(SkIntToScalar(150), SkIntToScalar(150), SkIntToScalar(125), SkIntToScalar(150));
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path.lineTo(SkIntToScalar(50), SkIntToScalar(150));
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path.close();
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if (fInvertDraw) {
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path.setFillType(SkPath::kInverseEvenOdd_FillType);
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} else {
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path.setFillType(SkPath::kEvenOdd_FillType);
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}
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SkPaint pathPaint;
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pathPaint.setAntiAlias(true);
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pathPaint.setColor(gPathColor);
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SkPath clipA;
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clipA.moveTo(SkIntToScalar(10), SkIntToScalar(20));
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clipA.lineTo(SkIntToScalar(165), SkIntToScalar(22));
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clipA.lineTo(SkIntToScalar(70), SkIntToScalar(105));
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clipA.lineTo(SkIntToScalar(165), SkIntToScalar(177));
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clipA.lineTo(SkIntToScalar(-5), SkIntToScalar(180));
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clipA.close();
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SkPath clipB;
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clipB.moveTo(SkIntToScalar(40), SkIntToScalar(10));
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clipB.lineTo(SkIntToScalar(190), SkIntToScalar(15));
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clipB.lineTo(SkIntToScalar(195), SkIntToScalar(190));
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clipB.lineTo(SkIntToScalar(40), SkIntToScalar(185));
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clipB.lineTo(SkIntToScalar(155), SkIntToScalar(100));
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clipB.close();
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SkPaint paint;
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paint.setAntiAlias(true);
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sk_tool_utils::set_portable_typeface(&paint);
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paint.setTextSize(SkIntToScalar(20));
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constexpr struct {
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SkRegion::Op fOp;
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const char* fName;
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} gOps[] = { //extra spaces in names for measureText
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{SkRegion::kIntersect_Op, "Isect "},
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{SkRegion::kDifference_Op, "Diff " },
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{SkRegion::kUnion_Op, "Union "},
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{SkRegion::kXOR_Op, "Xor " },
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{SkRegion::kReverseDifference_Op, "RDiff "}
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};
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canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
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canvas->scale(3 * SK_Scalar1 / 4, 3 * SK_Scalar1 / 4);
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if (fDoSaveLayer) {
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// We want the layer to appear symmetric relative to actual
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// device boundaries so we need to "undo" the effect of the
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// scale and translate
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SkRect bounds = SkRect::MakeLTRB(
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4.0f/3.0f * -20,
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4.0f/3.0f * -20,
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4.0f/3.0f * (this->getISize().fWidth - 20),
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4.0f/3.0f * (this->getISize().fHeight - 20));
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bounds.inset(SkIntToScalar(100), SkIntToScalar(100));
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SkPaint boundPaint;
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boundPaint.setColor(SK_ColorRED);
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boundPaint.setStyle(SkPaint::kStroke_Style);
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canvas->drawRect(bounds, boundPaint);
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canvas->saveLayer(&bounds, nullptr);
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}
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for (int invBits = 0; invBits < 4; ++invBits) {
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canvas->save();
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for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); ++op) {
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this->drawHairlines(canvas, path, clipA, clipB);
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bool doInvA = SkToBool(invBits & 1);
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bool doInvB = SkToBool(invBits & 2);
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canvas->save();
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// set clip
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clipA.setFillType(doInvA ? SkPath::kInverseEvenOdd_FillType :
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SkPath::kEvenOdd_FillType);
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clipB.setFillType(doInvB ? SkPath::kInverseEvenOdd_FillType :
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SkPath::kEvenOdd_FillType);
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canvas->clipPath(clipA, SkRegion::kIntersect_Op, fDoAAClip);
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canvas->clipPath(clipB, gOps[op].fOp, fDoAAClip);
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// In the inverse case we need to prevent the draw from covering the whole
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// canvas.
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if (fInvertDraw) {
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SkRect rectClip = clipA.getBounds();
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rectClip.join(path.getBounds());
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rectClip.join(path.getBounds());
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rectClip.outset(5, 5);
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canvas->clipRect(rectClip);
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}
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// draw path clipped
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canvas->drawPath(path, pathPaint);
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canvas->restore();
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SkScalar txtX = SkIntToScalar(45);
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paint.setColor(gClipAColor);
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const char* aTxt = doInvA ? "InvA " : "A ";
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canvas->drawText(aTxt, strlen(aTxt), txtX, SkIntToScalar(220), paint);
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txtX += paint.measureText(aTxt, strlen(aTxt));
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paint.setColor(SK_ColorBLACK);
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canvas->drawText(gOps[op].fName, strlen(gOps[op].fName),
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txtX, SkIntToScalar(220), paint);
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txtX += paint.measureText(gOps[op].fName, strlen(gOps[op].fName));
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paint.setColor(gClipBColor);
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const char* bTxt = doInvB ? "InvB " : "B ";
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canvas->drawText(bTxt, strlen(bTxt), txtX, SkIntToScalar(220), paint);
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canvas->translate(SkIntToScalar(250),0);
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}
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canvas->restore();
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canvas->translate(0, SkIntToScalar(250));
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}
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if (fDoSaveLayer) {
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canvas->restore();
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}
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}
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private:
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void drawHairlines(SkCanvas* canvas, const SkPath& path,
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const SkPath& clipA, const SkPath& clipB) {
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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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const SkAlpha fade = 0x33;
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// draw path in hairline
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paint.setColor(gPathColor); paint.setAlpha(fade);
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canvas->drawPath(path, paint);
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// draw clips in hair line
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paint.setColor(gClipAColor); paint.setAlpha(fade);
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canvas->drawPath(clipA, paint);
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paint.setColor(gClipBColor); paint.setAlpha(fade);
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canvas->drawPath(clipB, paint);
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}
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bool fDoAAClip;
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bool fDoSaveLayer;
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bool fInvertDraw;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new ComplexClipGM(false, false, false);)
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DEF_GM(return new ComplexClipGM(false, false, true);)
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DEF_GM(return new ComplexClipGM(false, true, false);)
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DEF_GM(return new ComplexClipGM(false, true, true);)
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DEF_GM(return new ComplexClipGM(true, false, false);)
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DEF_GM(return new ComplexClipGM(true, false, true);)
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DEF_GM(return new ComplexClipGM(true, true, false);)
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DEF_GM(return new ComplexClipGM(true, true, true);)
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}
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