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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 
     18 package android.filterpacks.imageproc;
     19 
     20 import android.filterfw.core.Filter;
     21 import android.filterfw.core.FilterContext;
     22 import android.filterfw.core.Frame;
     23 import android.filterfw.core.FrameFormat;
     24 import android.filterfw.core.GLFrame;
     25 import android.filterfw.core.NativeProgram;
     26 import android.filterfw.core.NativeFrame;
     27 import android.filterfw.core.Program;
     28 import android.filterfw.core.ShaderProgram;
     29 import android.filterfw.geometry.Quad;
     30 import android.filterfw.format.ImageFormat;
     31 import android.filterfw.format.ObjectFormat;
     32 
     33 import android.opengl.GLES20;
     34 
     35 /**
     36  * @hide
     37  */
     38 public class DrawOverlayFilter extends Filter {
     39 
     40     private ShaderProgram mProgram;
     41 
     42     public DrawOverlayFilter(String name) {
     43         super(name);
     44     }
     45 
     46     @Override
     47     public void setupPorts() {
     48         FrameFormat imageFormatMask = ImageFormat.create(ImageFormat.COLORSPACE_RGBA,
     49                                                          FrameFormat.TARGET_GPU);
     50         addMaskedInputPort("source", imageFormatMask);
     51         addMaskedInputPort("overlay", imageFormatMask);
     52         addMaskedInputPort("box", ObjectFormat.fromClass(Quad.class, FrameFormat.TARGET_SIMPLE));
     53         addOutputBasedOnInput("image", "source");
     54     }
     55 
     56     @Override
     57     public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) {
     58         return inputFormat;
     59     }
     60 
     61     @Override
     62     public void prepare(FilterContext context) {
     63         mProgram = ShaderProgram.createIdentity(context);
     64     }
     65 
     66     @Override
     67     public void process(FilterContext env) {
     68         // Get input frame
     69         Frame sourceFrame = pullInput("source");
     70         Frame overlayFrame = pullInput("overlay");
     71         Frame boxFrame = pullInput("box");
     72 
     73         // Get the box
     74         Quad box = (Quad)boxFrame.getObjectValue();
     75         box = box.translated(1.0f, 1.0f).scaled(2.0f);
     76 
     77         mProgram.setTargetRegion(box);
     78 
     79         // Create output frame with copy of input
     80         Frame output = env.getFrameManager().newFrame(sourceFrame.getFormat());
     81         output.setDataFromFrame(sourceFrame);
     82 
     83         // Draw onto output
     84         mProgram.process(overlayFrame, output);
     85 
     86         // Push output
     87         pushOutput("image", output);
     88 
     89         // Release pushed frame
     90         output.release();
     91     }
     92 }
     93