100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
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/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Sample.h"
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#include "SkCanvas.h"
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#include "SkColorFilter.h"
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#include "SkGradientShader.h"
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#include "SkImage.h"
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#include "SkPath.h"
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#include "SkRegion.h"
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#include "SkShader.h"
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#include "SkUtils.h"
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#include "Resources.h"
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const SkScalar gMat[] = {
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.3f, .6f, .1f, 0, 0,
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.3f, .6f, .1f, 0, 0,
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.3f, .6f, .1f, 0, 0,
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0, 0, 0, 1, 0,
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};
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class MixerView : public Sample {
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sk_sp<SkImage> fImg;
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sk_sp<SkColorFilter> fCF0;
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sk_sp<SkColorFilter> fCF1;
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float fWeight = 0;
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float fDW = 0.02f;
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public:
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MixerView() {}
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protected:
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bool onQuery(Event* evt) override {
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if (Sample::TitleQ(*evt)) {
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Sample::TitleR(evt, "Mixer");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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void dodraw(SkCanvas* canvas, sk_sp<SkColorFilter> cf0, sk_sp<SkColorFilter> cf1, float gap) {
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SkPaint paint;
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paint.setColorFilter(cf0);
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canvas->drawImage(fImg, 0, 0, &paint);
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paint.setColorFilter(SkColorFilter::MakeMixer(cf0, cf1, fWeight));
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canvas->drawImage(fImg, fImg->width() + gap * fWeight, 0, &paint);
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paint.setColorFilter(cf1);
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canvas->drawImage(fImg, 2*fImg->width() + gap, 0, &paint);
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}
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void onDrawContent(SkCanvas* canvas) override {
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if (!fImg) {
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fImg = GetResourceAsImage("images/mandrill_256.png");
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fCF0 = SkColorFilter::MakeMatrixFilterRowMajor255(gMat);
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fCF1 = SkColorFilter::MakeModeFilter(0xFF44CC88, SkBlendMode::kScreen);
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}
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float gap = fImg->width() * 3;
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canvas->translate(10, 10);
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dodraw(canvas, nullptr, fCF1, gap);
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canvas->translate(0, fImg->height() + 10);
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dodraw(canvas, fCF0, nullptr, gap);
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canvas->translate(0, fImg->height() + 10);
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dodraw(canvas, fCF0, fCF1, gap);
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fWeight += fDW;
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if (fWeight > 1 || fWeight < 0) {
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fDW = -fDW;
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}
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}
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virtual Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) override {
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return fRect.contains(SkScalarRoundToInt(x),
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SkScalarRoundToInt(y)) ? new Click(this) : nullptr;
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}
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bool onClick(Click* click) override {
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fRect.offset(click->fICurr.fX - click->fIPrev.fX,
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click->fICurr.fY - click->fIPrev.fY);
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return true;
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}
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private:
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SkIRect fRect;
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typedef Sample INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_SAMPLE( return new MixerView; )
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