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/*
* Copyright (C) 2010 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.graphics;
import com.android.layoutlib.bridge.impl.DelegateManager;
import java.awt.geom.AffineTransform;
/**
* Delegate implementing the native methods of android.graphics.Shader
*
* Through the layoutlib_create tool, the original native methods of Shader have been replaced
* by calls to methods of the same name in this delegate class.
*
* This class behaves like the original native implementation, but in Java, keeping previously
* native data into its own objects and mapping them to int that are sent back and forth between
* it and the original Shader class.
*
* This also serve as a base class for all Shader delegate classes.
*
* @see DelegateManager
*
*/
public abstract class Shader_Delegate {
// ---- delegate manager ----
protected static final DelegateManager<Shader_Delegate> sManager =
new DelegateManager<Shader_Delegate>();
// ---- delegate helper data ----
// ---- delegate data ----
private int mLocalMatrix = 0;
// ---- Public Helper methods ----
public static Shader_Delegate getDelegate(int nativeShader) {
return sManager.getDelegate(nativeShader);
}
public abstract java.awt.Paint getJavaPaint();
// ---- native methods ----
/*package*/ static void nativeDestructor(int native_shader, int native_skiaShader) {
sManager.removeDelegate(native_shader);
}
/*package*/ static boolean nativeGetLocalMatrix(int native_shader, int matrix_instance) {
// get the delegate from the native int.
Shader_Delegate shaderDelegate = sManager.getDelegate(native_shader);
if (shaderDelegate == null) {
assert false;
return false;
}
Matrix_Delegate localMatrixDelegate = null;
if (shaderDelegate.mLocalMatrix > 0) {
localMatrixDelegate = Matrix_Delegate.getDelegate(shaderDelegate.mLocalMatrix);
if (localMatrixDelegate == null) {
assert false;
return false;
}
}
Matrix_Delegate destMatrixDelegate = null;
if (matrix_instance > 0) {
destMatrixDelegate = Matrix_Delegate.getDelegate(shaderDelegate.mLocalMatrix);
if (destMatrixDelegate == null) {
assert false;
return false;
}
if (localMatrixDelegate != null) {
destMatrixDelegate.set(localMatrixDelegate);
} else {
// since there's no local matrix, it's considered to be the identity, reset
// the destination matrix
destMatrixDelegate.reset();
}
}
return localMatrixDelegate == null || localMatrixDelegate.isIdentity();
}
/*package*/ static void nativeSetLocalMatrix(int native_shader, int native_skiaShader,
int matrix_instance) {
// get the delegate from the native int.
Shader_Delegate shaderDelegate = sManager.getDelegate(native_shader);
if (shaderDelegate == null) {
assert false;
return;
}
shaderDelegate.mLocalMatrix = matrix_instance;
}
// ---- Private delegate/helper methods ----
protected AffineTransform getLocalMatrix() {
Matrix_Delegate localMatrixDelegate = null;
if (mLocalMatrix > 0) {
localMatrixDelegate = Matrix_Delegate.getDelegate(mLocalMatrix);
if (localMatrixDelegate == null) {
assert false;
return new AffineTransform();
}
return localMatrixDelegate.getAffineTransform();
}
return new AffineTransform();
}
}
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