1// Copyright 2020 Google LLC. 2// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. 3#include "tools/fiddle/examples.h" 4REG_FIDDLE(pathops, 1000, 600, false, 0) { 5void makePaint(SkPaint * paint, SkColor color) { 6 paint->setAntiAlias(true); 7 paint->setStyle(SkPaint::kFill_Style); 8 paint->setColor(color); 9} 10 11SkColor blend(SkColor one, SkColor two) { 12 SkBitmap temp; 13 temp.allocN32Pixels(1, 1); 14 SkCanvas canvas(temp); 15 canvas.drawColor(one); 16 canvas.drawColor(two); 17 void* pixels = temp.getPixels(); 18 return *(SkColor*)pixels; 19} 20 21void draw(SkCanvas* canvas) { 22 SkPaint fOnePaint; 23 SkPaint fTwoPaint; 24 SkPaint fOutlinePaint; 25 SkPaint fOpPaint[kReverseDifference_SkPathOp - kDifference_SkPathOp + 1]; 26 27 const unsigned oneColor = 0xFF8080FF; 28 const unsigned twoColor = 0x807F1f1f; 29 SkColor blendColor = blend(oneColor, twoColor); 30 makePaint(&fOnePaint, oneColor); 31 makePaint(&fTwoPaint, twoColor); 32 makePaint(&fOpPaint[kDifference_SkPathOp], oneColor); 33 makePaint(&fOpPaint[kIntersect_SkPathOp], blendColor); 34 makePaint(&fOpPaint[kUnion_SkPathOp], 0xFFc0FFc0); 35 makePaint(&fOpPaint[kReverseDifference_SkPathOp], twoColor); 36 makePaint(&fOpPaint[kXOR_SkPathOp], 0xFFa0FFe0); 37 makePaint(&fOutlinePaint, 0xFF000000); 38 fOutlinePaint.setStyle(SkPaint::kStroke_Style); 39 40 SkPath one, two; 41 int yPos = 0; 42 for (int oneFill = 0; oneFill <= 1; ++oneFill) { 43 SkPathFillType oneF = 44 oneFill ? SkPathFillType::kInverseEvenOdd : SkPathFillType::kEvenOdd; 45 for (int twoFill = 0; twoFill <= 1; ++twoFill) { 46 SkPathFillType twoF = 47 twoFill ? SkPathFillType::kInverseEvenOdd : SkPathFillType::kEvenOdd; 48 one.reset(); 49 one.setFillType(oneF); 50 51 one.moveTo(10, 10); 52 one.conicTo(0, 90, 50, 50, 3); 53 one.conicTo(90, 0, 90, 90, 2); 54 one.close(); 55 56 two.reset(); 57 two.setFillType(twoF); 58 two.addRect(40, 40, 100, 100); 59 canvas->save(); 60 canvas->translate(0, SkIntToScalar(yPos)); 61 canvas->clipRect(SkRect::MakeWH(110, 110), SkClipOp::kIntersect, true); 62 canvas->drawPath(one, fOnePaint); 63 canvas->drawPath(one, fOutlinePaint); 64 canvas->drawPath(two, fTwoPaint); 65 canvas->drawPath(two, fOutlinePaint); 66 canvas->restore(); 67 int xPos = 150; 68 for (int op = kDifference_SkPathOp; op <= kReverseDifference_SkPathOp; ++op) { 69 SkPath result; 70 Op(one, two, (SkPathOp)op, &result); 71 canvas->save(); 72 canvas->translate(SkIntToScalar(xPos), SkIntToScalar(yPos)); 73 canvas->clipRect(SkRect::MakeWH(110, 110), SkClipOp::kIntersect, true); 74 canvas->drawPath(result, fOpPaint[op]); 75 canvas->drawPath(result, fOutlinePaint); 76 canvas->restore(); 77 xPos += 150; 78 } 79 yPos += 150; 80 } 81 } 82} 83 84} // END FIDDLE 85