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/*
* Copyright (C) 2012 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 com.android.ide.eclipse.gltrace.state.transforms;
import com.android.ide.eclipse.gltrace.state.GLIntegerProperty;
import com.android.ide.eclipse.gltrace.state.GLStateType;
import com.android.ide.eclipse.gltrace.state.IGLProperty;
/**
* The {@link TextureUnitPropertyAccessor} provides the ability to access a
* texture unit property that is indexed based on the run time value of the
* {@link GLStateType#ACTIVE_TEXTURE_UNIT} property.
*/
public class TextureUnitPropertyAccessor implements IGLPropertyAccessor {
private final int mContextId;
private final IGLPropertyAccessor mActiveTextureAccessor;
private final GLStateType mTargetType;
public TextureUnitPropertyAccessor(int contextId, GLStateType targetPropertyType) {
mContextId = contextId;
mTargetType = targetPropertyType;
mActiveTextureAccessor = GLPropertyAccessor.makeAccessor(mContextId,
GLStateType.TEXTURE_STATE,
GLStateType.ACTIVE_TEXTURE_UNIT);
}
@Override
public IGLProperty getProperty(IGLProperty state) {
// first extract the current active texture unit
IGLProperty activeTextureProperty = mActiveTextureAccessor.getProperty(state);
if (!(activeTextureProperty instanceof GLIntegerProperty)) {
return null;
}
Integer activeTexture = (Integer) activeTextureProperty.getValue();
// extract the required property for the current texture unit
IGLPropertyAccessor targetAccessor = GLPropertyAccessor.makeAccessor(mContextId,
GLStateType.TEXTURE_STATE,
GLStateType.TEXTURE_UNITS,
activeTexture,
mTargetType);
return targetAccessor.getProperty(state);
}
@Override
public String getPath() {
return String.format("TEXTURE_STATE/TEXTURE_UNITS/${activeTextureUnit}/%s", mTargetType);
}
}
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