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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 "include/core/SkCanvas.h"
- #include "include/core/SkPoint3.h"
- #include "samplecode/DecodeFile.h"
- #include "samplecode/Sample.h"
- #include "src/core/SkNormalSource.h"
- #include "src/shaders/SkLightingShader.h"
- #include "tools/Resources.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 Sample {
- 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 = diffuseBitmap.makeShader();
- }
- {
- SkBitmap normalBitmap;
- SkAssertResult(GetResourceAsBitmap("images/brickwork_normal-map.jpg", &normalBitmap));
- sk_sp<SkShader> normalMap = normalBitmap.makeShader();
- fNormalSource = SkNormalSource::MakeFromNormalMap(std::move(normalMap), SkMatrix::I());
- }
- }
- protected:
- SkString name() override { return SkString("Lighting"); }
- 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);
- }
- Sample::Click* onFindClickHandler(SkScalar x, SkScalar y, ModifierKey modi) override {
- return this->INHERITED::onFindClickHandler(x, y, modi);
- }
- bool onAnimate(double nanos) 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 Sample INHERITED;
- };
- //////////////////////////////////////////////////////////////////////////////
- DEF_SAMPLE( return new LightingView(); )
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