| /* |
| * Copyright (C) 2011 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.filterfw; |
| |
| import android.filterfw.core.CachedFrameManager; |
| import android.filterfw.core.FilterContext; |
| import android.filterfw.core.FrameManager; |
| import android.filterfw.core.GLEnvironment; |
| |
| /** |
| * Base class for mobile filter framework (MFF) frontend environments. These convenience classes |
| * allow using the filter framework without the requirement of performing manual setup of its |
| * required components. |
| * |
| * @hide |
| */ |
| public class MffEnvironment { |
| |
| private FilterContext mContext; |
| |
| /** |
| * Protected constructor to initialize the environment's essential components. These are the |
| * frame-manager and the filter-context. Passing in null for the frame-manager causes this |
| * to be auto-created. |
| * |
| * @param frameManager The FrameManager to use or null to auto-create one. |
| */ |
| protected MffEnvironment(FrameManager frameManager) { |
| // Get or create the frame manager |
| if (frameManager == null) { |
| frameManager = new CachedFrameManager(); |
| } |
| |
| // Setup the environment |
| mContext = new FilterContext(); |
| mContext.setFrameManager(frameManager); |
| |
| } |
| |
| /** |
| * Returns the environment's filter-context. |
| */ |
| public FilterContext getContext() { |
| return mContext; |
| } |
| |
| /** |
| * Set the environment's GL environment to the specified environment. This does not activate |
| * the environment. |
| */ |
| public void setGLEnvironment(GLEnvironment glEnvironment) { |
| mContext.initGLEnvironment(glEnvironment); |
| } |
| |
| /** |
| * Create and activate a new GL environment for use in this filter context. |
| */ |
| public void createGLEnvironment() { |
| GLEnvironment glEnvironment = new GLEnvironment(); |
| glEnvironment.initWithNewContext(); |
| setGLEnvironment(glEnvironment); |
| } |
| |
| /** |
| * Activate the GL environment for use in the current thread. A GL environment must have been |
| * previously set or created using setGLEnvironment() or createGLEnvironment()! Call this after |
| * having switched to a new thread for GL filter execution. |
| */ |
| public void activateGLEnvironment() { |
| GLEnvironment glEnv = mContext.getGLEnvironment(); |
| if (glEnv != null) { |
| mContext.getGLEnvironment().activate(); |
| } else { |
| throw new NullPointerException("No GLEnvironment in place to activate!"); |
| } |
| } |
| |
| /** |
| * Deactivate the GL environment from use in the current thread. A GL environment must have been |
| * previously set or created using setGLEnvironment() or createGLEnvironment()! Call this before |
| * running GL filters in another thread. |
| */ |
| public void deactivateGLEnvironment() { |
| GLEnvironment glEnv = mContext.getGLEnvironment(); |
| if (glEnv != null) { |
| mContext.getGLEnvironment().deactivate(); |
| } else { |
| throw new NullPointerException("No GLEnvironment in place to deactivate!"); |
| } |
| } |
| } |