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.MutableFrameFormat;
26import android.filterfw.core.NativeProgram;
27import android.filterfw.core.NativeFrame;
28import android.filterfw.core.Program;
29import android.filterfw.core.ShaderProgram;
30import android.filterfw.format.ImageFormat;
31
32/**
33 * @hide
34 */
35public class FlipFilter extends Filter {
36
37    @GenerateFieldPort(name = "vertical", hasDefault = true)
38    private boolean mVertical = false;
39
40    @GenerateFieldPort(name = "horizontal", hasDefault = true)
41    private boolean mHorizontal = false;
42
43    @GenerateFieldPort(name = "tile_size", hasDefault = true)
44    private int mTileSize = 640;
45
46    private Program mProgram;
47    private int mTarget = FrameFormat.TARGET_UNSPECIFIED;
48
49    public FlipFilter(String name) {
50        super(name);
51    }
52
53    @Override
54    public void setupPorts() {
55        addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA));
56        addOutputBasedOnInput("image", "image");
57    }
58
59    @Override
60    public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) {
61        return inputFormat;
62    }
63
64    public void initProgram(FilterContext context, int target) {
65        switch (target) {
66            case FrameFormat.TARGET_GPU:
67                ShaderProgram shaderProgram = ShaderProgram.createIdentity(context);
68                shaderProgram.setMaximumTileSize(mTileSize);
69                mProgram = shaderProgram;
70                break;
71
72            default:
73                throw new RuntimeException("Filter Sharpen does not support frames of " +
74                    "target " + target + "!");
75        }
76        mTarget = target;
77        updateParameters();
78    }
79
80    @Override
81    public void fieldPortValueUpdated(String name, FilterContext context) {
82        if (mProgram != null) {
83            updateParameters();
84        }
85    }
86
87    @Override
88    public void process(FilterContext context) {
89        // Get input frame
90        Frame input = pullInput("image");
91        FrameFormat inputFormat = input.getFormat();
92
93        // Create program if not created already
94        if (mProgram == null || inputFormat.getTarget() != mTarget) {
95            initProgram(context, inputFormat.getTarget());
96        }
97
98        // Create output frame
99        Frame output = context.getFrameManager().newFrame(inputFormat);
100
101        // Process
102        mProgram.process(input, output);
103
104        // Push output
105        pushOutput("image", output);
106
107        // Release pushed frame
108        output.release();
109    }
110
111    private void updateParameters() {
112        float x_origin = (mHorizontal) ? 1.0f : 0.0f;
113        float y_origin = (mVertical) ? 1.0f : 0.0f;
114
115        float width  = (mHorizontal) ? -1.0f : 1.0f;
116        float height  = (mVertical) ? -1.0f : 1.0f;
117
118        ((ShaderProgram) mProgram).setSourceRect(x_origin, y_origin, width, height);
119    }
120}
121