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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 package android.filterpacks.imageproc;
     18 
     19 import android.filterfw.core.Filter;
     20 import android.filterfw.core.FilterContext;
     21 import android.filterfw.core.Frame;
     22 import android.filterfw.core.FrameFormat;
     23 import android.filterfw.core.GenerateFieldPort;
     24 import android.filterfw.core.KeyValueMap;
     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.format.ImageFormat;
     30 import android.filterpacks.imageproc.ImageCombineFilter;
     31 import android.graphics.Bitmap;
     32 
     33 import android.util.Log;
     34 
     35 /**
     36  * @hide
     37  */
     38 public class BitmapOverlayFilter extends Filter {
     39 
     40     @GenerateFieldPort(name = "bitmap")
     41     private Bitmap mBitmap;
     42 
     43     @GenerateFieldPort(name = "tile_size", hasDefault = true)
     44     private int mTileSize = 640;
     45 
     46     private Program mProgram;
     47     private Frame mFrame;
     48 
     49     private int mWidth = 0;
     50     private int mHeight = 0;
     51     private int mTarget = FrameFormat.TARGET_UNSPECIFIED;
     52 
     53     private final String mOverlayShader =
     54             "precision mediump float;\n" +
     55             "uniform sampler2D tex_sampler_0;\n" +
     56             "uniform sampler2D tex_sampler_1;\n" +
     57             "varying vec2 v_texcoord;\n" +
     58             "void main() {\n" +
     59             "  vec4 original = texture2D(tex_sampler_0, v_texcoord);\n" +
     60             "  vec4 mask = texture2D(tex_sampler_1, v_texcoord);\n" +
     61             "  gl_FragColor = vec4(original.rgb * (1.0 - mask.a) + mask.rgb, 1.0);\n" +
     62             "}\n";
     63 
     64     public BitmapOverlayFilter(String name) {
     65         super(name);
     66     }
     67 
     68     @Override
     69     public void setupPorts() {
     70         addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA));
     71         addOutputBasedOnInput("image", "image");
     72     }
     73 
     74     @Override
     75     public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) {
     76         return inputFormat;
     77     }
     78 
     79     public void initProgram(FilterContext context, int target) {
     80         switch (target) {
     81             case FrameFormat.TARGET_GPU:
     82                 ShaderProgram shaderProgram = new ShaderProgram(context, mOverlayShader);
     83                 shaderProgram.setMaximumTileSize(mTileSize);
     84                 mProgram = shaderProgram;
     85                 break;
     86 
     87             default:
     88                 throw new RuntimeException("Filter FisheyeFilter does not support frames of " +
     89                     "target " + target + "!");
     90         }
     91         mTarget = target;
     92     }
     93 
     94     @Override
     95     public void tearDown(FilterContext context) {
     96         if (mFrame != null) {
     97             mFrame.release();
     98             mFrame = null;
     99         }
    100     }
    101 
    102     @Override
    103     public void process(FilterContext context) {
    104         // Get input frame
    105         Frame input = pullInput("image");
    106         FrameFormat inputFormat = input.getFormat();
    107 
    108         // Create output frame
    109         Frame output = context.getFrameManager().newFrame(inputFormat);
    110 
    111         // Create program if not created already
    112         if (mProgram == null || inputFormat.getTarget() != mTarget) {
    113             initProgram(context, inputFormat.getTarget());
    114         }
    115 
    116         // Check if the frame size has changed
    117         if (inputFormat.getWidth() != mWidth || inputFormat.getHeight() != mHeight) {
    118             mWidth = inputFormat.getWidth();
    119             mHeight = inputFormat.getHeight();
    120 
    121             createBitmapFrame(context);
    122         }
    123 
    124         // Process
    125         Frame[] inputs = {input, mFrame};
    126         mProgram.process(inputs, output);
    127 
    128         // Push output
    129         pushOutput("image", output);
    130 
    131         // Release pushed frame
    132         output.release();
    133     }
    134 
    135     private void createBitmapFrame(FilterContext context) {
    136         if (mBitmap != null) {
    137             FrameFormat format = ImageFormat.create(mBitmap.getWidth(),
    138                                                     mBitmap.getHeight(),
    139                                                     ImageFormat.COLORSPACE_RGBA,
    140                                                     FrameFormat.TARGET_GPU);
    141 
    142             if (mFrame != null) {
    143                 mFrame.release();
    144             }
    145 
    146             mFrame = context.getFrameManager().newFrame(format);
    147             mFrame.setBitmap(mBitmap);
    148 
    149             mBitmap.recycle();
    150             mBitmap = null;
    151         }
    152     }
    153 }
    154