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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 "SkCanvas.h"
#include "SkPath.h"
namespace skiagm {
static SkPath generate_square(SkScalar cx, SkScalar cy, SkScalar w) {
SkRect rect = SkRect::MakeXYWH(cx - w / 2, cy - w / 2, w, w);
SkPath path;
path.addRect(rect);
return path;
}
static SkPath generate_rect_line(SkScalar cx, SkScalar cy, SkScalar l) {
SkRect rect = SkRect::MakeXYWH(cx - l / 2, cy, l, 0);
SkPath path;
path.addRect(rect);
return path;
}
static SkPath generate_circle(SkScalar cx, SkScalar cy, SkScalar d) {
SkPath path;
path.addCircle(cx, cy, d/2, SkPath::kCW_Direction);
return path;
}
static SkPath generate_line(SkScalar cx, SkScalar cy, SkScalar l) {
SkPath path;
path.moveTo(cx - l / 2, cy);
path.lineTo(cx + l / 2, cy);
return path;
}
SkPaint::Style styles[] = {
SkPaint::kStroke_Style,
SkPaint::kStrokeAndFill_Style,
SkPaint::kFill_Style
};
SkScalar pathSizes[] = {
40,
10,
0
};
SkScalar strokeWidths[] = {
10,
0
};
SkPath ((*paths[])(SkScalar, SkScalar, SkScalar)) = {
generate_square,
generate_rect_line,
generate_circle,
generate_line
};
const SkScalar slideWidth = 90, slideHeight = 90;
const SkScalar slideBoundary = 5;
class InversePathsGM : public GM {
public:
InversePathsGM() {
}
protected:
SkString onShortName() override {
return SkString("inverse_paths");
}
SkISize onISize() override {
return SkISize::Make(800, 900);
}
void onDraw(SkCanvas* canvas) override {
SkScalar cx = slideWidth / 2 + slideBoundary;
SkScalar cy = slideHeight / 2 + slideBoundary;
SkScalar dx = slideWidth + 2 * slideBoundary;
SkScalar dy = slideHeight + 2 * slideBoundary;
SkRect clipRect = SkRect::MakeLTRB(slideBoundary, slideBoundary,
slideBoundary + slideWidth,
slideBoundary + slideHeight);
SkPaint clipPaint;
clipPaint.setStyle(SkPaint::kStroke_Style);
clipPaint.setStrokeWidth(SkIntToScalar(2));
SkPaint outlinePaint;
outlinePaint.setColor(0x40000000);
outlinePaint.setStyle(SkPaint::kStroke_Style);
outlinePaint.setStrokeWidth(SkIntToScalar(0));
for (size_t styleIndex = 0; styleIndex < SK_ARRAY_COUNT(styles);
styleIndex++) {
for (size_t sizeIndex = 0; sizeIndex < SK_ARRAY_COUNT(pathSizes);
sizeIndex++) {
SkScalar size = pathSizes[sizeIndex];
canvas->save();
for (size_t widthIndex = 0;
widthIndex < SK_ARRAY_COUNT(strokeWidths);
widthIndex++) {
SkPaint paint;
paint.setColor(0xff007000);
paint.setStrokeWidth(strokeWidths[widthIndex]);
paint.setStyle(styles[styleIndex]);
for (size_t pathIndex = 0;
pathIndex < SK_ARRAY_COUNT(paths);
pathIndex++) {
canvas->drawRect(clipRect, clipPaint);
canvas->save();
canvas->clipRect(clipRect);
SkPath path = paths[pathIndex](cx, cy, size);
path.setFillType(SkPath::kInverseWinding_FillType);
canvas->drawPath(path, paint);
path.setFillType(SkPath::kWinding_FillType);
canvas->drawPath(path, outlinePaint);
canvas->restore();
canvas->translate(dx, 0);
}
}
canvas->restore();
canvas->translate(0, dy);
}
}
}
private:
typedef GM INHERITED;
};
DEF_GM( return new InversePathsGM; )
}
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