44 lines
4.0 KiB
Java
44 lines
4.0 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 RgbSobelShader 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(){vec3 bottomLeft = texture2D(inputImageTexture, bottomLeftTextureCoordinate).rgb;vec3 topRight = texture2D(inputImageTexture, topRightTextureCoordinate).rgb;vec3 topLeft = texture2D(inputImageTexture, topLeftTextureCoordinate).rgb;vec3 bottomRight = texture2D(inputImageTexture, bottomRightTextureCoordinate).rgb;vec3 left = texture2D(inputImageTexture, leftTextureCoordinate).rgb;vec3 right = texture2D(inputImageTexture, rightTextureCoordinate).rgb;vec3 bottom = texture2D(inputImageTexture, bottomTextureCoordinate).rgb;vec3 top = texture2D(inputImageTexture, topTextureCoordinate).rgb;vec3 h = (2.0 * (bottom - top)) + (bottomLeft + bottomRight - topLeft - topRight);vec3 v = (2.0 * (right - left)) + (bottomRight + topRight - bottomLeft - topLeft);vec3 mag = edgeStrength * vec3(length(vec2(h.r, v.r)), length(vec2(h.g, v.g)), length(vec2(h.b, v.b)));gl_FragColor = vec4(vec3(mag.r + mag.g + mag.b), 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 RgbSobelShader(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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