58 lines
2.2 KiB
Java
58 lines
2.2 KiB
Java
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.graphics;
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/**
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* AvoidXfermode xfermode will draw the src everywhere except on top of the
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* opColor or, depending on the Mode, draw only on top of the opColor.
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*/
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public class AvoidXfermode extends Xfermode {
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// these need to match the enum in SkAvoidXfermode.h on the native side
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public enum Mode {
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AVOID (0), //!< draw everywhere except on the opColor
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TARGET (1); //!< draw only on top of the opColor
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Mode(int nativeInt) {
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this.nativeInt = nativeInt;
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}
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final int nativeInt;
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}
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/**
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* This xfermode will draw the src everywhere except on top of the opColor
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* or, depending on the Mode, draw only on top of the opColor.
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*
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* @param opColor The color to avoid (or to target depending on Mode). Note
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* that the alpha in opColor is ignored.
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* @param tolerance How closely we compare a pixel to the opColor.
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* 0 - only operate if exact match
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* 255 - maximum gradation (blending) based on how
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* similar the pixel is to our opColor (max tolerance)
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* @param mode If we should avoid or target the opColor
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*/
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public AvoidXfermode(int opColor, int tolerance, Mode mode) {
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if (tolerance < 0 || tolerance > 255) {
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throw new IllegalArgumentException("tolerance must be 0..255");
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}
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native_instance = nativeCreate(opColor, tolerance, mode.nativeInt);
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}
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private static native int nativeCreate(int opColor, int tolerance,
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int nativeMode);
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}
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