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/*
* Copyright 2014 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 "SkGradientShader.h"
#include "SkTLList.h"
static SkBitmap make_bmp(int w, int h) {
SkBitmap bmp;
bmp.allocN32Pixels(w, h, true);
SkCanvas canvas(bmp);
SkScalar wScalar = SkIntToScalar(w);
SkScalar hScalar = SkIntToScalar(h);
SkPoint pt = { wScalar / 2, hScalar / 2 };
SkScalar radius = 3 * SkMaxScalar(wScalar, hScalar);
SkColor colors[] = { SK_ColorDKGRAY, 0xFF222255,
0xFF331133, 0xFF884422,
0xFF000022, SK_ColorWHITE,
0xFFAABBCC};
SkScalar pos[] = {0,
SK_Scalar1 / 6,
2 * SK_Scalar1 / 6,
3 * SK_Scalar1 / 6,
4 * SK_Scalar1 / 6,
5 * SK_Scalar1 / 6,
SK_Scalar1};
SkPaint paint;
paint.setShader(SkGradientShader::CreateRadial(
pt, radius,
colors, pos,
SK_ARRAY_COUNT(colors),
SkShader::kRepeat_TileMode))->unref();
SkRect rect = SkRect::MakeWH(wScalar, hScalar);
SkMatrix mat = SkMatrix::I();
for (int i = 0; i < 4; ++i) {
paint.getShader()->setLocalMatrix(mat);
canvas.drawRect(rect, paint);
rect.inset(wScalar / 8, hScalar / 8);
mat.preTranslate(6 * wScalar, 6 * hScalar);
mat.postScale(SK_Scalar1 / 3, SK_Scalar1 / 3);
}
paint.setAntiAlias(true);
paint.setTextSize(wScalar / 2.2f);
paint.setShader(0);
paint.setColor(SK_ColorLTGRAY);
static const char kTxt[] = "Skia";
SkPoint texPos = { wScalar / 17, hScalar / 2 + paint.getTextSize() / 2.5f };
canvas.drawText(kTxt, SK_ARRAY_COUNT(kTxt)-1, texPos.fX, texPos.fY, paint);
paint.setColor(SK_ColorBLACK);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SK_Scalar1);
canvas.drawText(kTxt, SK_ARRAY_COUNT(kTxt)-1, texPos.fX, texPos.fY, paint);
return bmp;
}
namespace skiagm {
/**
* This GM tests convex polygon clips.
*/
class ConvexPolyClip : public GM {
public:
ConvexPolyClip() {
this->setBGColor(0xFFFFFFFF);
}
protected:
virtual SkString onShortName() SK_OVERRIDE {
return SkString("convex_poly_clip");
}
virtual SkISize onISize() SK_OVERRIDE {
return make_isize(435, 440);
}
virtual void onOnceBeforeDraw() SK_OVERRIDE {
SkPath tri;
tri.moveTo(5.f, 5.f);
tri.lineTo(100.f, 20.f);
tri.lineTo(15.f, 100.f);
fPaths.addToTail(tri);
SkPath hexagon;
static const SkScalar kRadius = 45.f;
const SkPoint center = { kRadius, kRadius };
for (int i = 0; i < 6; ++i) {
SkScalar angle = 2 * SK_ScalarPI * i / 6;
SkPoint point;
point.fY = SkScalarSinCos(angle, &point.fX);
point.scale(kRadius);
point = center + point;
if (0 == i) {
hexagon.moveTo(point);
} else {
hexagon.lineTo(point);
}
}
fPaths.addToTail(hexagon);
SkMatrix scaleM;
scaleM.setScale(1.1f, 0.4f, kRadius, kRadius);
hexagon.transform(scaleM);
fPaths.addToTail(hexagon);
SkPath rotRect;
SkRect rect = SkRect::MakeLTRB(10.f, 12.f, 80.f, 86.f);
rotRect.addRect(rect);
SkMatrix rotM;
rotM.setRotate(23.f, rect.centerX(), rect.centerY());
rotRect.transform(rotM);
fPaths.addToTail(rotRect);
fBmp = make_bmp(100, 100);
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
const SkPath* path;
SkScalar y = 0;
static const SkScalar kMargin = 10.f;
SkPaint bgPaint;
bgPaint.setAlpha(0x15);
SkISize size = canvas->getDeviceSize();
SkRect dstRect = SkRect::MakeWH(SkIntToScalar(size.fWidth),
SkIntToScalar(size.fHeight));
canvas->drawBitmapRectToRect(fBmp, NULL, dstRect, &bgPaint);
for (SkTLList<SkPath>::Iter iter(fPaths, SkTLList<SkPath>::Iter::kHead_IterStart);
NULL != (path = iter.get());
iter.next()) {
SkScalar x = 0;
for (int aa = 0; aa < 2; ++aa) {
canvas->save();
canvas->translate(x, y);
canvas->clipPath(*path, SkRegion::kIntersect_Op, SkToBool(aa));
canvas->drawBitmap(fBmp, 0, 0);
canvas->restore();
x += fBmp.width() + kMargin;
}
for (int aa = 0; aa < 2; ++aa) {
static const char kTxt[] = "Clip Me!";
SkPaint txtPaint;
txtPaint.setTextSize(23.f);
txtPaint.setAntiAlias(true);
txtPaint.setColor(SK_ColorDKGRAY);
SkPaint clipOutlinePaint;
clipOutlinePaint.setAntiAlias(true);
clipOutlinePaint.setColor(0x50505050);
clipOutlinePaint.setStyle(SkPaint::kStroke_Style);
clipOutlinePaint.setStrokeWidth(0);
canvas->save();
canvas->translate(x, y);
SkPath closedClipPath = *path;
closedClipPath.close();
canvas->drawPath(closedClipPath, clipOutlinePaint);
canvas->clipPath(*path, SkRegion::kIntersect_Op, SkToBool(aa));
canvas->scale(1.f, 1.8f);
canvas->drawText(kTxt, SK_ARRAY_COUNT(kTxt)-1,
0, 1.5f * txtPaint.getTextSize(),
txtPaint);
canvas->restore();
x += fBmp.width() + kMargin;
}
y += fBmp.height() + kMargin;
}
}
virtual uint32_t onGetFlags() const {
return kAsBench_Flag;
}
private:
SkTLList<SkPath> fPaths;
SkBitmap fBmp;
typedef GM INHERITED;
};
DEF_GM( return SkNEW(ConvexPolyClip); )
}
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