libs/hwui/LightingInfo.h

/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include "Lighting.h"
#include "Properties.h"

namespace android {
namespace uirenderer {

class LightingInfo {
public:

    static float getLightRadius() {
        if (CC_UNLIKELY(Properties::overrideLightRadius > 0)) {
            return Properties::overrideLightRadius;
        }
        return mLightRadius;
    }

    static uint8_t getAmbientShadowAlpha() {
        if (CC_UNLIKELY(Properties::overrideAmbientShadowStrength >= 0)) {
            return Properties::overrideAmbientShadowStrength;
        }
        return mAmbientShadowAlpha;
    }

    static uint8_t getSpotShadowAlpha() {
        if (CC_UNLIKELY(Properties::overrideSpotShadowStrength >= 0)) {
            return Properties::overrideSpotShadowStrength;
        }
        return mSpotShadowAlpha;
    }

    static Vector3 getLightCenter() {
        if (CC_UNLIKELY(Properties::overrideLightPosY > 0 || Properties::overrideLightPosZ > 0)) {
            Vector3 adjustedLightCenter = mLightCenter;
            if (CC_UNLIKELY(Properties::overrideLightPosY > 0)) {
                // negated since this shifts up
                adjustedLightCenter.y = -Properties::overrideLightPosY;
            }
            if (CC_UNLIKELY(Properties::overrideLightPosZ > 0)) {
                adjustedLightCenter.z = Properties::overrideLightPosZ;
            }
            return adjustedLightCenter;
        }
        return mLightCenter;
    }

    static Vector3 getLightCenterRaw() {
        return mLightCenter;
    }

    static void setLightCenterRaw(const Vector3& lightCenter) {
        mLightCenter = lightCenter;
    }

    static void updateLighting(const LightGeometry& lightGeometry, const LightInfo& lightInfo) {
        mLightRadius = lightGeometry.radius;
        mAmbientShadowAlpha = lightInfo.ambientShadowAlpha;
        mSpotShadowAlpha = lightInfo.spotShadowAlpha;
        mLightCenter = lightGeometry.center;
    }
private:
    static float mLightRadius;
    static uint8_t mAmbientShadowAlpha;
    static uint8_t mSpotShadowAlpha;
    static Vector3 mLightCenter;
};

} /* namespace uirenderer */
} /* namespace android */