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/*
* Copyright (C) 2006 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.
*/
// This file was generated from the C++ include file: SkColorFilter.h
// Any changes made to this file will be discarded by the build.
// To change this file, either edit the include, or device/tools/gluemaker/main.cpp,
// or one of the auxilary file specifications in device/tools/gluemaker.
package android.graphics;
/**
* A color filter that can be used to simulate simple lighting effects.
* A <code>LightingColorFilter</code> is defined by two parameters, one
* used to multiply the source color (called <code>colorMultiply</code>)
* and one used to add to the source color (called <code>colorAdd</code>).
* The alpha channel is left untouched by this color filter.
*
* Given a source color RGB, the resulting R'G'B' color is computed thusly:
* <pre>
* R' = R * colorMultiply.R + colorAdd.R
* G' = G * colorMultiply.G + colorAdd.G
* B' = B * colorMultiply.B + colorAdd.B
* </pre>
* The result is pinned to the <code>[0..255]</code> range for each channel.
*/
public class LightingColorFilter extends ColorFilter {
private int mMul;
private int mAdd;
/**
* Create a colorfilter that multiplies the RGB channels by one color,
* and then adds a second color. The alpha components of the mul and add
* arguments are ignored.
*/
public LightingColorFilter(int mul, int add) {
mMul = mul;
mAdd = add;
update();
}
/**
* Returns the RGB color used to multiply the source color when the
* color filter is applied.
*
* @see #setColorMultiply(int)
*
* @hide
*/
public int getColorMultiply() {
return mMul;
}
/**
* Specifies the RGB color used to multiply the source color when the
* color filter is applied.
* The alpha channel of this color is ignored.
*
* @see #getColorMultiply()
*
* @hide
*/
public void setColorMultiply(int mul) {
mMul = mul;
update();
}
/**
* Returns the RGB color that will be added to the source color
* when the color filter is applied.
*
* @see #setColorAdd(int)
*
* @hide
*/
public int getColorAdd() {
return mAdd;
}
/**
* Specifies the RGB that will be added to the source color when
* the color filter is applied.
* The alpha channel of this color is ignored.
*
* @see #getColorAdd()
*
* @hide
*/
public void setColorAdd(int add) {
mAdd = add;
update();
}
private void update() {
destroyFilter(native_instance);
native_instance = native_CreateLightingFilter(mMul, mAdd);
}
private static native long native_CreateLightingFilter(int mul, int add);
}
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