| /* |
| * Copyright (C) 2018 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. |
| */ |
| |
| package android.view.shadow; |
| |
| /** |
| * Model for ambient shadow rendering. Assumes light sources from centroid of the object. |
| */ |
| class AmbientShadowConfig { |
| |
| private final float mEdgeScale; |
| private final float mShadowBoundRatio; |
| private final float mShadowStrength; |
| |
| private final float[] mPolygon; |
| private float[] mLightSourcePosition; |
| |
| private AmbientShadowConfig(Builder builder) { |
| mEdgeScale = builder.mEdgeScale; |
| mShadowBoundRatio = builder.mShadowBoundRatio; |
| mShadowStrength = builder.mShadowStrength; |
| mPolygon = builder.mPolygon; |
| mLightSourcePosition = builder.mLightSourcePosition; |
| } |
| |
| /** |
| * Returns scales intensity of the edge of the shadow (opacity) [0-100] |
| */ |
| public float getEdgeScale() { |
| return mEdgeScale; |
| } |
| |
| /** |
| * Returns scales the area (in xy) of the shadow [0-1] |
| */ |
| public float getShadowBoundRatio() { |
| return mShadowBoundRatio; |
| } |
| |
| /** |
| * Returns scales the intensity of the entire shadow (opacity) [0-1] |
| */ |
| public float getShadowStrength() { |
| return mShadowStrength; |
| } |
| |
| /** |
| * Returns opaque polygon to cast shadow |
| */ |
| public float[] getPolygon() { |
| return mPolygon; |
| } |
| |
| /** |
| * Returns 2D position of the light source |
| */ |
| public float[] getLightSourcePosition() { |
| return mLightSourcePosition; |
| } |
| |
| public static class Builder { |
| |
| private float mEdgeScale; |
| private float mShadowBoundRatio; |
| private float mShadowStrength; |
| |
| private float[] mPolygon; |
| private float[] mLightSourcePosition; |
| |
| public Builder setEdgeScale(float edgeScale) { |
| mEdgeScale = edgeScale; |
| return this; |
| } |
| |
| public Builder setShadowBoundRatio(float shadowBoundRatio) { |
| mShadowBoundRatio = shadowBoundRatio; |
| return this; |
| } |
| |
| public Builder setShadowStrength(float shadowStrength) { |
| mShadowStrength = shadowStrength; |
| return this; |
| } |
| |
| public Builder setPolygon(float[] polygon) { |
| mPolygon = polygon; |
| return this; |
| } |
| |
| public Builder setLightSourcePosition(float x, float y) { |
| mLightSourcePosition = new float[] { x, y }; |
| return this; |
| } |
| |
| public AmbientShadowConfig build() { |
| return new AmbientShadowConfig(this); |
| } |
| } |
| } |