85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
|
// Copyright 2020 Google LLC.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
|
||
|
|
#include "tools/fiddle/examples.h"
|
||
|
|
REG_FIDDLE(pathops, 1000, 600, false, 0) {
|
||
|
|
void makePaint(SkPaint * paint, SkColor color) {
|
||
|
|
paint->setAntiAlias(true);
|
||
|
|
paint->setStyle(SkPaint::kFill_Style);
|
||
|
|
paint->setColor(color);
|
||
|
|
}
|
||
|
|
|
||
|
|
SkColor blend(SkColor one, SkColor two) {
|
||
|
|
SkBitmap temp;
|
||
|
|
temp.allocN32Pixels(1, 1);
|
||
|
|
SkCanvas canvas(temp);
|
||
|
|
canvas.drawColor(one);
|
||
|
|
canvas.drawColor(two);
|
||
|
|
void* pixels = temp.getPixels();
|
||
|
|
return *(SkColor*)pixels;
|
||
|
|
}
|
||
|
|
|
||
|
|
void draw(SkCanvas* canvas) {
|
||
|
|
SkPaint fOnePaint;
|
||
|
|
SkPaint fTwoPaint;
|
||
|
|
SkPaint fOutlinePaint;
|
||
|
|
SkPaint fOpPaint[kReverseDifference_SkPathOp - kDifference_SkPathOp + 1];
|
||
|
|
|
||
|
|
const unsigned oneColor = 0xFF8080FF;
|
||
|
|
const unsigned twoColor = 0x807F1f1f;
|
||
|
|
SkColor blendColor = blend(oneColor, twoColor);
|
||
|
|
makePaint(&fOnePaint, oneColor);
|
||
|
|
makePaint(&fTwoPaint, twoColor);
|
||
|
|
makePaint(&fOpPaint[kDifference_SkPathOp], oneColor);
|
||
|
|
makePaint(&fOpPaint[kIntersect_SkPathOp], blendColor);
|
||
|
|
makePaint(&fOpPaint[kUnion_SkPathOp], 0xFFc0FFc0);
|
||
|
|
makePaint(&fOpPaint[kReverseDifference_SkPathOp], twoColor);
|
||
|
|
makePaint(&fOpPaint[kXOR_SkPathOp], 0xFFa0FFe0);
|
||
|
|
makePaint(&fOutlinePaint, 0xFF000000);
|
||
|
|
fOutlinePaint.setStyle(SkPaint::kStroke_Style);
|
||
|
|
|
||
|
|
SkPath one, two;
|
||
|
|
int yPos = 0;
|
||
|
|
for (int oneFill = 0; oneFill <= 1; ++oneFill) {
|
||
|
|
SkPathFillType oneF =
|
||
|
|
oneFill ? SkPathFillType::kInverseEvenOdd : SkPathFillType::kEvenOdd;
|
||
|
|
for (int twoFill = 0; twoFill <= 1; ++twoFill) {
|
||
|
|
SkPathFillType twoF =
|
||
|
|
twoFill ? SkPathFillType::kInverseEvenOdd : SkPathFillType::kEvenOdd;
|
||
|
|
one.reset();
|
||
|
|
one.setFillType(oneF);
|
||
|
|
|
||
|
|
one.moveTo(10, 10);
|
||
|
|
one.conicTo(0, 90, 50, 50, 3);
|
||
|
|
one.conicTo(90, 0, 90, 90, 2);
|
||
|
|
one.close();
|
||
|
|
|
||
|
|
two.reset();
|
||
|
|
two.setFillType(twoF);
|
||
|
|
two.addRect(40, 40, 100, 100);
|
||
|
|
canvas->save();
|
||
|
|
canvas->translate(0, SkIntToScalar(yPos));
|
||
|
|
canvas->clipRect(SkRect::MakeWH(110, 110), SkClipOp::kIntersect, true);
|
||
|
|
canvas->drawPath(one, fOnePaint);
|
||
|
|
canvas->drawPath(one, fOutlinePaint);
|
||
|
|
canvas->drawPath(two, fTwoPaint);
|
||
|
|
canvas->drawPath(two, fOutlinePaint);
|
||
|
|
canvas->restore();
|
||
|
|
int xPos = 150;
|
||
|
|
for (int op = kDifference_SkPathOp; op <= kReverseDifference_SkPathOp; ++op) {
|
||
|
|
SkPath result;
|
||
|
|
Op(one, two, (SkPathOp)op, &result);
|
||
|
|
canvas->save();
|
||
|
|
canvas->translate(SkIntToScalar(xPos), SkIntToScalar(yPos));
|
||
|
|
canvas->clipRect(SkRect::MakeWH(110, 110), SkClipOp::kIntersect, true);
|
||
|
|
canvas->drawPath(result, fOpPaint[op]);
|
||
|
|
canvas->drawPath(result, fOutlinePaint);
|
||
|
|
canvas->restore();
|
||
|
|
xPos += 150;
|
||
|
|
}
|
||
|
|
yPos += 150;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
} // END FIDDLE
|