37 lines
1.7 KiB
Java
37 lines
1.7 KiB
Java
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package com.kofax.kmc.ken.engines.gpu.shaders;
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import android.opengl.GLES20;
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import com.kofax.kmc.ken.engines.gpu.OpenGLESContextManager;
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import com.kofax.kmc.ken.engines.gpu.OpenGlUtils;
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/* loaded from: classes3.dex */
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public class ScaleHistogramShader extends SinglePassShader {
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protected static final String FragmentShaderString = "precision highp float;varying vec2 textureCoordinate;uniform sampler2D inputImageTexture;uniform float minValue;uniform float scaleFactor;void main(){float val = scaleFactor * (texture2D(inputImageTexture, textureCoordinate).r - minValue);gl_FragColor = vec4(vec3(val), 1.0);}";
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protected int _minValueUniform;
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protected int _scaleFactorUniform;
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public ScaleHistogramShader(OpenGLESContextManager openGLESContextManager) {
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super(openGLESContextManager);
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this._minValueUniform = 0;
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this._scaleFactorUniform = 0;
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}
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@Override // com.kofax.kmc.ken.engines.gpu.shaders.SinglePassShader
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public int getProgram() {
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if (this._program == 0) {
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this._program = OpenGlUtils.loadProgram("attribute vec4 position;attribute vec4 inputTextureCoordinate;varying vec2 textureCoordinate;void main(){gl_Position = position;textureCoordinate = inputTextureCoordinate.xy;}", FragmentShaderString, new int[]{0, 1}, new String[]{"position", "inputTextureCoordinate"}, 2);
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this._minValueUniform = GLES20.glGetUniformLocation(this._program, "minValue");
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this._scaleFactorUniform = GLES20.glGetUniformLocation(this._program, "scaleFactor");
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}
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return this._program;
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}
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public int getScaleFactorUniform() {
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return this._scaleFactorUniform;
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}
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public int getMinValueUniform() {
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return this._minValueUniform;
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}
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}
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