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/*
* Copyright 2012 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 "SkPaint.h"
#include "SkGradientShader.h"
static void intToScalars(SkScalar dst[], const int src[], int n) {
for (int i = 0; i < n; ++i) {
dst[i] = SkIntToScalar(src[i]);
}
}
static void drawGrad(SkCanvas* canvas, const SkScalar d0[], const SkScalar d1[]) {
const SkRect bounds = SkRect::MakeXYWH(SkIntToScalar(-50),
SkIntToScalar(-50),
SkIntToScalar(200),
SkIntToScalar(100));
SkPoint c0 = { d0[0], d0[1] };
SkScalar r0 = d0[2];
SkPoint c1 = { d1[0], d1[1] };
SkScalar r1 = d1[2];
SkColor colors[] = { SK_ColorGREEN, SK_ColorRED };
SkPaint paint;
paint.setAntiAlias(true);
SkString str;
str.printf("%g,%g,%g %g,%g,%g",
SkScalarToFloat(c0.fX), SkScalarToFloat(c0.fY), SkScalarToFloat(r0),
SkScalarToFloat(c1.fX), SkScalarToFloat(c1.fY), SkScalarToFloat(r1));
canvas->drawText(str.c_str(), str.size(),
bounds.fLeft, bounds.fTop - paint.getTextSize()/2, paint);
paint.setShader(SkGradientShader::CreateTwoPointConical(c0, r0, c1, r1,
colors, NULL, 2,
SkShader::kClamp_TileMode))->unref();
canvas->drawRect(bounds, paint);
paint.setShader(NULL);
paint.setColor(0x66000000);
paint.setStyle(SkPaint::kStroke_Style);
canvas->drawCircle(c0.fX, c0.fY, r0, paint);
canvas->drawCircle(c1.fX, c1.fY, r1, paint);
canvas->drawRect(bounds, paint);
}
class TwoPointRadialGM : public skiagm::GM {
public:
TwoPointRadialGM() {}
protected:
SkString onShortName() {
return SkString("twopointconical");
}
SkISize onISize() { return skiagm::make_isize(480, 780); }
virtual void onDraw(SkCanvas* canvas) {
if (false) {
SkPaint paint;
paint.setColor(SK_ColorBLUE);
canvas->drawRect(
SkRect::MakeWH(SkIntToScalar(this->getISize().fWidth),
SkIntToScalar(this->getISize().fHeight)),
paint);
}
SkPaint paint;
const int R0 = 20;
const int R1 = 40;
const SkScalar DX = SkIntToScalar(250);
const SkScalar DY = SkIntToScalar(130);
canvas->translate(SkIntToScalar(60), SkIntToScalar(70));
static const int gData[] = {
0, 0, R0, 0, 0, R1,
0, 0, R0, 20, 0, R1,
0, 0, R0, 25, 0, R1,
0, 0, R0, 100, 0, R1,
0, 0, R0, 25, 0, R0,
0, 0, R0, 100, 0, R0,
};
int count = SK_ARRAY_COUNT(gData) / 6;
for (int i = 0; i < count; ++i) {
SkScalar data[6];
intToScalars(data, &gData[i * 6], 6);
int n = canvas->save();
drawGrad(canvas, &data[0], &data[3]);
canvas->translate(DX, 0);
drawGrad(canvas, &data[3], &data[0]);
canvas->restoreToCount(n);
canvas->translate(0, DY);
}
}
};
//////////////////////////////////////////////////////////////////////////////
static skiagm::GM* F(void*) { return new TwoPointRadialGM; }
static skiagm::GMRegistry gR(F);
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