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
17package android.filterpacks.imageproc;
18
19import android.filterfw.core.Filter;
20import android.filterfw.core.FilterContext;
21import android.filterfw.core.Frame;
22import android.filterfw.core.FrameFormat;
23import android.filterfw.core.GenerateFieldPort;
24import android.filterfw.core.KeyValueMap;
25import android.filterfw.core.NativeProgram;
26import android.filterfw.core.NativeFrame;
27import android.filterfw.core.Program;
28import android.filterfw.core.ShaderProgram;
29import android.filterfw.format.ImageFormat;
30import android.filterpacks.imageproc.ImageCombineFilter;
31import android.graphics.Bitmap;
32
33import android.util.Log;
34
35/**
36 * @hide
37 */
38public 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 mTarget = FrameFormat.TARGET_UNSPECIFIED;
50
51    private final String mOverlayShader =
52            "precision mediump float;\n" +
53            "uniform sampler2D tex_sampler_0;\n" +
54            "uniform sampler2D tex_sampler_1;\n" +
55            "varying vec2 v_texcoord;\n" +
56            "void main() {\n" +
57            "  vec4 original = texture2D(tex_sampler_0, v_texcoord);\n" +
58            "  vec4 mask = texture2D(tex_sampler_1, v_texcoord);\n" +
59            "  gl_FragColor = vec4(original.rgb * (1.0 - mask.a) + mask.rgb, 1.0);\n" +
60            "}\n";
61
62    public BitmapOverlayFilter(String name) {
63        super(name);
64    }
65
66    @Override
67    public void setupPorts() {
68        addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA));
69        addOutputBasedOnInput("image", "image");
70    }
71
72    @Override
73    public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) {
74        return inputFormat;
75    }
76
77    public void initProgram(FilterContext context, int target) {
78        switch (target) {
79            case FrameFormat.TARGET_GPU:
80                ShaderProgram shaderProgram = new ShaderProgram(context, mOverlayShader);
81                shaderProgram.setMaximumTileSize(mTileSize);
82                mProgram = shaderProgram;
83                break;
84
85            default:
86                throw new RuntimeException("Filter FisheyeFilter does not support frames of " +
87                    "target " + target + "!");
88        }
89        mTarget = target;
90    }
91
92    @Override
93    public void tearDown(FilterContext context) {
94        if (mFrame != null) {
95            mFrame.release();
96            mFrame = null;
97        }
98    }
99
100    @Override
101    public void process(FilterContext context) {
102        // Get input frame
103        Frame input = pullInput("image");
104        FrameFormat inputFormat = input.getFormat();
105
106        // Create output frame
107        Frame output = context.getFrameManager().newFrame(inputFormat);
108
109        // Create program if not created already
110        if (mProgram == null || inputFormat.getTarget() != mTarget) {
111            initProgram(context, inputFormat.getTarget());
112        }
113
114        if (mBitmap != null) {
115            Frame frame = createBitmapFrame(context);
116            // Process
117            Frame[] inputs = {input, frame};
118            mProgram.process(inputs, output);
119
120            frame.release();
121        } else {
122            output.setDataFromFrame(input);
123        }
124
125        // Push output
126        pushOutput("image", output);
127
128        // Release pushed frame
129        output.release();
130    }
131
132    private Frame createBitmapFrame(FilterContext context) {
133        FrameFormat format = ImageFormat.create(mBitmap.getWidth(),
134                                                mBitmap.getHeight(),
135                                                ImageFormat.COLORSPACE_RGBA,
136                                                FrameFormat.TARGET_GPU);
137
138        Frame frame = context.getFrameManager().newFrame(format);
139        frame.setBitmap(mBitmap);
140
141        mBitmap.recycle();
142        mBitmap = null;
143
144        return frame;
145    }
146}
147