38 lines
2.9 KiB
Java
38 lines
2.9 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 GrayScaleAndLaplacianShader extends SinglePassShader {
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protected static final String FragmentShaderString = "precision highp float;varying vec2 textureCoordinate;varying vec2 leftTextureCoordinate;varying vec2 rightTextureCoordinate;varying vec2 topTextureCoordinate;varying vec2 bottomTextureCoordinate;uniform sampler2D inputImageTexture;const vec3 W = vec3(0.2125, 0.7154, 0.0721);void main(){float leftIntensity = dot(texture2D(inputImageTexture, leftTextureCoordinate).rgb, W);float rightIntensity = dot(texture2D(inputImageTexture, rightTextureCoordinate).rgb, W);float bottomIntensity = dot(texture2D(inputImageTexture, bottomTextureCoordinate).rgb, W);float topIntensity = dot(texture2D(inputImageTexture, topTextureCoordinate).rgb, W);float centerIntensity = dot(texture2D(inputImageTexture, textureCoordinate).rgb, W);float resultIntensity = topIntensity + rightIntensity + bottomIntensity + leftIntensity - 4.0 * centerIntensity;gl_FragColor = vec4(vec3(resultIntensity), 1.0);}";
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protected static final String VertextShaderString = "attribute vec4 position;attribute vec4 inputTextureCoordinate;uniform float texelWidth;uniform float texelHeight;varying vec2 textureCoordinate;varying vec2 leftTextureCoordinate;varying vec2 rightTextureCoordinate;varying vec2 topTextureCoordinate;varying vec2 bottomTextureCoordinate;void main(){gl_Position = position;vec2 widthStep = vec2(texelWidth, 0.0);vec2 heightStep = vec2(0.0, texelHeight);textureCoordinate = inputTextureCoordinate.xy;leftTextureCoordinate = inputTextureCoordinate.xy - widthStep;rightTextureCoordinate = inputTextureCoordinate.xy + widthStep;topTextureCoordinate = inputTextureCoordinate.xy - heightStep;bottomTextureCoordinate = inputTextureCoordinate.xy + heightStep;}";
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protected int _texelHeightUniform;
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protected int _texelWidthUniform;
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public GrayScaleAndLaplacianShader(OpenGLESContextManager openGLESContextManager) {
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super(openGLESContextManager);
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this._texelWidthUniform = 0;
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this._texelHeightUniform = 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(VertextShaderString, FragmentShaderString, new int[]{0, 1}, new String[]{"position", "inputTextureCoordinate"}, 2);
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this._texelWidthUniform = GLES20.glGetUniformLocation(this._program, "texelWidth");
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this._texelHeightUniform = GLES20.glGetUniformLocation(this._program, "texelHeight");
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}
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return this._program;
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}
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public int getTexelWidthUniform() {
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return this._texelWidthUniform;
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}
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public int getTexelHeightUniform() {
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return this._texelHeightUniform;
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}
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}
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