| /* |
| * 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.filterpacks.imageproc; |
| |
| import android.filterfw.core.Filter; |
| import android.filterfw.core.FilterContext; |
| import android.filterfw.core.Frame; |
| import android.filterfw.core.FrameFormat; |
| import android.filterfw.core.ShaderProgram; |
| import android.filterfw.geometry.Quad; |
| import android.filterfw.format.ImageFormat; |
| import android.filterfw.format.ObjectFormat; |
| |
| /** |
| * @hide |
| */ |
| public class DrawOverlayFilter extends Filter { |
| |
| private ShaderProgram mProgram; |
| |
| public DrawOverlayFilter(String name) { |
| super(name); |
| } |
| |
| @Override |
| public void setupPorts() { |
| FrameFormat imageFormatMask = ImageFormat.create(ImageFormat.COLORSPACE_RGBA, |
| FrameFormat.TARGET_GPU); |
| addMaskedInputPort("source", imageFormatMask); |
| addMaskedInputPort("overlay", imageFormatMask); |
| addMaskedInputPort("box", ObjectFormat.fromClass(Quad.class, FrameFormat.TARGET_SIMPLE)); |
| addOutputBasedOnInput("image", "source"); |
| } |
| |
| @Override |
| public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { |
| return inputFormat; |
| } |
| |
| @Override |
| public void prepare(FilterContext context) { |
| mProgram = ShaderProgram.createIdentity(context); |
| } |
| |
| @Override |
| public void process(FilterContext env) { |
| // Get input frame |
| Frame sourceFrame = pullInput("source"); |
| Frame overlayFrame = pullInput("overlay"); |
| Frame boxFrame = pullInput("box"); |
| |
| // Get the box |
| Quad box = (Quad)boxFrame.getObjectValue(); |
| box = box.translated(1.0f, 1.0f).scaled(2.0f); |
| |
| mProgram.setTargetRegion(box); |
| |
| // Create output frame with copy of input |
| Frame output = env.getFrameManager().newFrame(sourceFrame.getFormat()); |
| output.setDataFromFrame(sourceFrame); |
| |
| // Draw onto output |
| mProgram.process(overlayFrame, output); |
| |
| // Push output |
| pushOutput("image", output); |
| |
| // Release pushed frame |
| output.release(); |
| } |
| } |