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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "DecodeFile.h"
#include "SampleCode.h"
#include "Resources.h"
#include "SkCanvas.h"
#include "SkLightingShader.h"
#include "SkNormalSource.h"
#include "SkPoint3.h"
static sk_sp<SkLights> create_lights(SkScalar angle, SkScalar blue) {
const SkVector3 dir = SkVector3::Make(SkScalarSin(angle)*SkScalarSin(SK_ScalarPI*0.25f),
SkScalarCos(angle)*SkScalarSin(SK_ScalarPI*0.25f),
SkScalarCos(SK_ScalarPI*0.25f));
SkLights::Builder builder;
builder.add(SkLights::Light::MakeDirectional(SkColor3f::Make(1.0f, 1.0f, blue), dir));
builder.setAmbientLightColor(SkColor3f::Make(0.1f, 0.1f, 0.1f));
return builder.finish();
}
////////////////////////////////////////////////////////////////////////////
class LightingView : public SampleView {
public:
LightingView() : fLightAngle(0.0f) , fColorFactor(0.0f) {
{
SkBitmap diffuseBitmap;
SkAssertResult(GetResourceAsBitmap("images/brickwork-texture.jpg", &diffuseBitmap));
fRect = SkRect::MakeIWH(diffuseBitmap.width(), diffuseBitmap.height());
fDiffuseShader = SkShader::MakeBitmapShader(diffuseBitmap,
SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode,
nullptr);
}
{
SkBitmap normalBitmap;
SkAssertResult(GetResourceAsBitmap("images/brickwork_normal-map.jpg", &normalBitmap));
sk_sp<SkShader> normalMap = SkShader::MakeBitmapShader(normalBitmap,
SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode,
nullptr);
fNormalSource = SkNormalSource::MakeFromNormalMap(std::move(normalMap), SkMatrix::I());
}
}
protected:
// overrides from SkEventSink
bool onQuery(SkEvent* evt) override {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Lighting");
return true;
}
return this->INHERITED::onQuery(evt);
}
void onDrawContent(SkCanvas* canvas) override {
sk_sp<SkLights> lights(create_lights(fLightAngle, fColorFactor));
SkPaint paint;
paint.setShader(SkLightingShader::Make(fDiffuseShader,
fNormalSource,
std::move(lights)));
paint.setColor(SK_ColorBLACK);
canvas->drawRect(fRect, paint);
}
SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) override {
return this->INHERITED::onFindClickHandler(x, y, modi);
}
bool onAnimate(const SkAnimTimer& timer) override {
fLightAngle += 0.015f;
fColorFactor += 0.01f;
if (fColorFactor > 1.0f) {
fColorFactor = 0.0f;
}
return true;
}
private:
SkRect fRect;
sk_sp<SkShader> fDiffuseShader;
sk_sp<SkNormalSource> fNormalSource;
SkScalar fLightAngle;
SkScalar fColorFactor;
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new LightingView; }
static SkViewRegister reg(MyFactory);
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