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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkBitmap.h"
#include "SkPath.h"
#include "SkPathOps.h"
#include "SkRect.h"
namespace skiagm {
class PathOpsInverseGM : public GM {
public:
PathOpsInverseGM() {
}
protected:
void onOnceBeforeDraw() SK_OVERRIDE {
const unsigned oneColor = 0xFF8080FF;
const unsigned twoColor = 0x807F1f1f;
SkColor blendColor = blend(oneColor, twoColor);
makePaint(&fOnePaint, oneColor);
makePaint(&fTwoPaint, twoColor);
makePaint(&fOpPaint[kDifference_PathOp], oneColor);
makePaint(&fOpPaint[kIntersect_PathOp], blendColor);
makePaint(&fOpPaint[kUnion_PathOp], 0xFFc0FFc0);
makePaint(&fOpPaint[kReverseDifference_PathOp], twoColor);
makePaint(&fOpPaint[kXOR_PathOp], 0xFFa0FFe0);
makePaint(&fOutlinePaint, 0xFF000000);
fOutlinePaint.setStyle(SkPaint::kStroke_Style);
}
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 makePaint(SkPaint* paint, SkColor color) {
paint->setAntiAlias(true);
paint->setStyle(SkPaint::kFill_Style);
paint->setColor(color);
}
SkString onShortName() SK_OVERRIDE {
return SkString("pathopsinverse");
}
SkISize onISize() SK_OVERRIDE {
return SkISize::Make(1200, 900);
}
void onDraw(SkCanvas* canvas) SK_OVERRIDE {
SkPath one, two;
int yPos = 0;
for (int oneFill = 0; oneFill <= 1; ++oneFill) {
SkPath::FillType oneF = oneFill ? SkPath::kInverseEvenOdd_FillType
: SkPath::kEvenOdd_FillType;
for (int twoFill = 0; twoFill <= 1; ++twoFill) {
SkPath::FillType twoF = twoFill ? SkPath::kInverseEvenOdd_FillType
: SkPath::kEvenOdd_FillType;
one.reset();
one.setFillType(oneF);
one.addRect(10, 10, 70, 70);
two.reset();
two.setFillType(twoF);
two.addRect(40, 40, 100, 100);
canvas->save();
canvas->translate(0, SkIntToScalar(yPos));
canvas->clipRect(SkRect::MakeWH(110, 110), SkRegion::kIntersect_Op, 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_PathOp; op <= kReverseDifference_PathOp; ++op) {
SkPath result;
Op(one, two, (SkPathOp) op, &result);
canvas->save();
canvas->translate(SkIntToScalar(xPos), SkIntToScalar(yPos));
canvas->clipRect(SkRect::MakeWH(110, 110), SkRegion::kIntersect_Op, true);
canvas->drawPath(result, fOpPaint[op]);
canvas->drawPath(result, fOutlinePaint);
canvas->restore();
xPos += 150;
}
yPos += 150;
}
}
}
private:
SkPaint fOnePaint;
SkPaint fTwoPaint;
SkPaint fOutlinePaint;
SkPaint fOpPaint[kReverseDifference_PathOp - kDifference_PathOp + 1];
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new PathOpsInverseGM; }
static GMRegistry reg(MyFactory);
}
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