| /* |
| * 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) {} |
| |
| protected: |
| SkString name() override { return SkString("Lighting"); } |
| |
| void onOnceBeforeDraw() override { |
| { |
| 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()); |
| } |
| } |
| |
| 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(); ) |