skia2/samplecode/SampleAnimatedGradient.cpp
rmistry@google.com ae933ce0ea Result of running tools/sanitize_source_files.py (which was added in https://codereview.appspot.com/6465078/)
This CL is part III of IV (I broke down the 1280 files into 4 CLs).
Review URL: https://codereview.appspot.com/6475053

git-svn-id: http://skia.googlecode.com/svn/trunk@5264 2bbb7eff-a529-9590-31e7-b0007b416f81
2012-08-23 18:19:56 +00:00

99 lines
3.1 KiB
C++

/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SampleCode.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
class GradientView : public SampleView {
public:
GradientView() {
this->setBGColor(0xFFDDDDDD);
}
protected:
struct GradData {
int fCount;
const SkColor* fColors;
const SkScalar* fPos;
};
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Gradients");
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual void onDrawContent(SkCanvas* canvas) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SkScalarHalf(SkIntToScalar(3)));
paint.setStyle(SkPaint::kFill_Style);
SkPoint p = SkPoint::Make(0,0);
SkPoint q = SkPoint::Make(100,100);
SkPoint pts[] = {p, q};
SkScalar t, temp, x, y;
SkColor gColors[] = {
SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK
};
t = SampleCode::GetAnimScalar(SkIntToScalar(2), SkIntToScalar(20));
temp = SampleCode::GetAnimScalar(SkIntToScalar(1), SkIntToScalar(8));
SkScalar step = SK_ScalarPI / (10);
SkScalar angle = t * step;
x = SkScalarSinCos(angle, &y);
SkScalar colorPositions[] = { 0, 0.1 + x, 0.4 + y, 0.9 - x + y, 1.0};
GradData data = { 5, gColors, colorPositions };
SkRect r = { 0, 0, SkIntToScalar(200), SkIntToScalar(200) };
SkShader* shader1 = SkGradientShader::CreateLinear(
pts, data.fColors, data.fPos,data.fCount,
SkShader::kMirror_TileMode);
paint.setShader(shader1)->unref();
canvas->drawRect(r, paint);
SkPoint s = SkPoint::Make(100,100);
SkShader* shader2 = SkGradientShader::CreateRadial(
s, 100, data.fColors, data.fPos, data.fCount,
SkShader::kMirror_TileMode);
paint.setShader(shader2)->unref();
canvas->translate(250, 0);
canvas->drawRect(r, paint);
SkShader* shader3 = SkGradientShader::CreateTwoPointRadial(
p, 0, q, 100, data.fColors, data.fPos, data.fCount,
SkShader::kMirror_TileMode);
paint.setShader(shader3)->unref();
canvas->translate(0, 250);
canvas->drawRect(r, paint);
SkShader* shader4 = SkGradientShader::CreateSweep(
100, 100, data.fColors, data.fPos, data.fCount);
paint.setShader(shader4)->unref();
canvas->translate(-250, 0);
canvas->drawRect(r, paint);
this->inval(NULL);
}
private:
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new GradientView; }
static SkViewRegister reg(MyFactory);