44 lines
4.1 KiB
Java
44 lines
4.1 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 GraySobelShader extends SinglePassShader {
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protected static final String FragmentShaderString = "precision highp float;varying vec2 leftTextureCoordinate;varying vec2 rightTextureCoordinate;varying vec2 topTextureCoordinate;varying vec2 topLeftTextureCoordinate;varying vec2 topRightTextureCoordinate;varying vec2 bottomTextureCoordinate;varying vec2 bottomLeftTextureCoordinate;varying vec2 bottomRightTextureCoordinate;uniform sampler2D inputImageTexture;uniform float edgeStrength;void main(){float bottomLeftIntensity = texture2D(inputImageTexture, bottomLeftTextureCoordinate).r;float topRightIntensity = texture2D(inputImageTexture, topRightTextureCoordinate).r;float topLeftIntensity = texture2D(inputImageTexture, topLeftTextureCoordinate).r;float bottomRightIntensity = texture2D(inputImageTexture, bottomRightTextureCoordinate).r;float leftIntensity = texture2D(inputImageTexture, leftTextureCoordinate).r;float rightIntensity = texture2D(inputImageTexture, rightTextureCoordinate).r;float bottomIntensity = texture2D(inputImageTexture, bottomTextureCoordinate).r;float topIntensity = texture2D(inputImageTexture, topTextureCoordinate).r;float h = -topLeftIntensity - 2.0 * topIntensity - topRightIntensity + bottomLeftIntensity + 2.0 * bottomIntensity + bottomRightIntensity;float v = -bottomLeftIntensity - 2.0 * leftIntensity - topLeftIntensity + bottomRightIntensity + 2.0 * rightIntensity + topRightIntensity;float mag = length(vec2(h, v)) * edgeStrength;gl_FragColor = vec4(vec3(mag), 1.0);}";
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protected int _edgeStrengthUniform;
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protected int _texelHeightUniform;
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protected int _texelWidthUniform;
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public GraySobelShader(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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this._edgeStrengthUniform = 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;uniform float texelWidth;uniform float texelHeight;varying vec2 leftTextureCoordinate;varying vec2 rightTextureCoordinate;varying vec2 topTextureCoordinate;varying vec2 topLeftTextureCoordinate;varying vec2 topRightTextureCoordinate;varying vec2 bottomTextureCoordinate;varying vec2 bottomLeftTextureCoordinate;varying vec2 bottomRightTextureCoordinate;void main(){gl_Position = position;vec2 widthStep = vec2(texelWidth, 0.0);vec2 heightStep = vec2(0.0, texelHeight);vec2 widthHeightStep = vec2(texelWidth, texelHeight);vec2 widthNegativeHeightStep = vec2(texelWidth, -texelHeight);leftTextureCoordinate = inputTextureCoordinate.xy - widthStep;rightTextureCoordinate = inputTextureCoordinate.xy + widthStep;topTextureCoordinate = inputTextureCoordinate.xy - heightStep;topLeftTextureCoordinate = inputTextureCoordinate.xy - widthHeightStep;topRightTextureCoordinate = inputTextureCoordinate.xy + widthNegativeHeightStep;bottomTextureCoordinate = inputTextureCoordinate.xy + heightStep;bottomLeftTextureCoordinate = inputTextureCoordinate.xy - widthNegativeHeightStep;bottomRightTextureCoordinate = inputTextureCoordinate.xy + widthHeightStep;}", 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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this._edgeStrengthUniform = GLES20.glGetUniformLocation(this._program, "edgeStrength");
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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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public int getEdgeStrengthUniform() {
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return this._edgeStrengthUniform;
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}
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}
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