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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkCanvas.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkImage.h"
#include "include/core/SkPath.h"
#include "include/core/SkRegion.h"
#include "include/core/SkShader.h"
#include "include/effects/SkGradientShader.h"
#include "samplecode/Sample.h"
#include "src/core/SkUtils.h"
#include "tools/Resources.h"
const float gMat[] = {
.3f, .6f, .1f, 0, 0,
.3f, .6f, .1f, 0, 0,
.3f, .6f, .1f, 0, 0,
0, 0, 0, 1, 0,
};
class MixerView : public Sample {
sk_sp<SkImage> fImg;
sk_sp<SkColorFilter> fCF0;
sk_sp<SkColorFilter> fCF1;
float fWeight = 0;
float fDW = 0.02f;
public:
MixerView() {}
protected:
SkString name() override { return SkString("Mixer"); }
void dodraw(SkCanvas* canvas, sk_sp<SkColorFilter> cf0, sk_sp<SkColorFilter> cf1, float gap) {
SkPaint paint;
paint.setColorFilter(cf0);
canvas->drawImage(fImg, 0, 0, &paint);
paint.setColorFilter(SkColorFilters::Lerp(fWeight, cf0, cf1));
canvas->drawImage(fImg, fImg->width() + gap * fWeight, 0, &paint);
paint.setColorFilter(cf1);
canvas->drawImage(fImg, 2*fImg->width() + gap, 0, &paint);
}
void onDrawContent(SkCanvas* canvas) override {
if (!fImg) {
fImg = GetResourceAsImage("images/mandrill_256.png");
fCF0 = SkColorFilters::Matrix(gMat);
fCF1 = SkColorFilters::Blend(0xFF44CC88, SkBlendMode::kScreen);
}
float gap = fImg->width() * 3;
canvas->translate(10, 10);
dodraw(canvas, nullptr, fCF1, gap);
canvas->translate(0, fImg->height() + 10);
dodraw(canvas, fCF0, nullptr, gap);
canvas->translate(0, fImg->height() + 10);
dodraw(canvas, fCF0, fCF1, gap);
fWeight += fDW;
if (fWeight > 1 || fWeight < 0) {
fDW = -fDW;
}
}
virtual Click* onFindClickHandler(SkScalar x, SkScalar y, skui::ModifierKey) override {
return fRect.contains(SkScalarRoundToInt(x),
SkScalarRoundToInt(y)) ? new Click() : nullptr;
}
bool onClick(Click* click) override {
fRect.offset(click->fCurr.fX - click->fPrev.fX,
click->fCurr.fY - click->fPrev.fY);
return true;
}
private:
SkIRect fRect;
typedef Sample INHERITED;
};
DEF_SAMPLE( return new MixerView; )
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