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BrightnessEffect.java
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BrightnessEffect.java
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package com.sherazkhilji.videffects;
import android.opengl.GLSurfaceView;
import com.sherazkhilji.videffects.interfaces.ShaderInterface;
/**
* Adjusts the brightness of the video.
*
* @author sheraz.khilji
*/
public class BrightnessEffect implements ShaderInterface {
private float brightnessValue;
/**
* Initialize Effect
*
* @param brightnessvalue Range should be between 0.1- 2.0 with 1.0 being normal.
*/
public BrightnessEffect(float brightnessvalue) {
if (brightnessvalue < 0.1f)
brightnessvalue = 0.1f;
if (brightnessvalue > 2.0f)
brightnessvalue = 2.0f;
this.brightnessValue = brightnessvalue;
}
@Override
public String getShader(GLSurfaceView mGlSurfaceView) {
return "#extension GL_OES_EGL_image_external : require\n"
+ "precision mediump float;\n"
+ "uniform samplerExternalOES sTexture;\n"
+ "float brightness ;\n" + "varying vec2 vTextureCoord;\n"
+ "void main() {\n" + " brightness =" + brightnessValue
+ ";\n"
+ " vec4 color = texture2D(sTexture, vTextureCoord);\n"
+ " gl_FragColor = brightness * color;\n" + "}\n";
}
}