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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 TexturePropertyAccessor} provides the ability to access a
* texture property. Texture properties are accessed by first identifying the active
* texture unit ({@link GLStateType#ACTIVE_TEXTURE_UNIT}), and then identifying the texture
* that is bound to that unit.
*/
public class TexturePropertyAccessor implements IGLPropertyAccessor {
private final int mContextId;
private final GLStateType mTargetUnitType;
private final GLStateType mTextureType;
private TextureUnitPropertyAccessor mTextureUnitPropertyAccessor;
public TexturePropertyAccessor(int contextId, GLStateType textureUnitTarget,
GLStateType textureTargetName) {
mContextId = contextId;
mTargetUnitType = textureUnitTarget;
mTextureType = textureTargetName;
mTextureUnitPropertyAccessor = new TextureUnitPropertyAccessor(mContextId,
mTargetUnitType);
}
@Override
public IGLProperty getProperty(IGLProperty state) {
// identify the texture that is bound in the current active texture unit
IGLProperty targetTexture = mTextureUnitPropertyAccessor.getProperty(state);
if (!(targetTexture instanceof GLIntegerProperty)) {
return null;
}
Integer textureId = (Integer) targetTexture.getValue();
// now extract the required property from the selected texture
IGLPropertyAccessor textureAccessor = GLPropertyAccessor.makeAccessor(mContextId,
GLStateType.TEXTURE_STATE,
GLStateType.TEXTURES,
textureId,
mTextureType);
return textureAccessor.getProperty(state);
}
}
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