BrightnessFilter.java revision 21d0ac7403b836e32e2bdbdc8dc98f42b2dfa4e5 
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
18package android.filterpacks.imageproc;
19
20import android.filterfw.core.Filter;
21import android.filterfw.core.FilterContext;
22import android.filterfw.core.Frame;
23import android.filterfw.core.FrameFormat;
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;
29
30public class BrightnessFilter extends SimpleImageFilter {
31
32    private static final String mBrightnessShader =
33            "precision mediump float;\n" +
34            "uniform sampler2D tex_sampler_0;\n" +
35            "uniform float brightness;\n" +
36            "varying vec2 v_texcoord;\n" +
37            "void main() {\n" +
38            "  vec4 color = texture2D(tex_sampler_0, v_texcoord);\n" +
39            "  gl_FragColor = brightness * color;\n" +
40            "}\n";
41
42    public BrightnessFilter(String name) {
43        super(name, "brightness");
44    }
45
46    @Override
47    protected Program getNativeProgram() {
48        return new NativeProgram("filterpack_imageproc", "brightness");
49    }
50
51    @Override
52    protected Program getShaderProgram() {
53        return new ShaderProgram(mBrightnessShader);
54    }
55
56}
57