Android Open Source - FxCameraApp Gl Color Packing Shader

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Back to project page FxCameraApp.

License

The source code is released under:

MIT License

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Java Source Code

package com.af.experiments.FxCameraApp.shaders;
import static android.opengl.GLES20.glUniform1f;
/*from  www .j  a  v  a 2s .  com*/
public class GlColorPackingShader extends GlShader {

  private static final String VERTEX_SHADER =
      "attribute vec4 aPosition;" +
      "attribute vec4 aTextureCoord;" +

      "uniform highp float texelWidth;" +
      "uniform highp float texelHeight;" +

      "varying vec2 upperLeftInputTextureCoordinate;" +
      "varying vec2 upperRightInputTextureCoordinate;" +
      "varying vec2 lowerLeftInputTextureCoordinate;" +
      "varying vec2 lowerRightInputTextureCoordinate;" +

      "void main() {" +
        "gl_Position = aPosition;" +
        "vec2 texcoord = aTextureCoord.xy;" +
        "upperLeftInputTextureCoordinate  = texcoord.xy + vec2(-texelWidth, -texelHeight);" +
        "upperRightInputTextureCoordinate = texcoord.xy + vec2( texelWidth, -texelHeight);" +
        "lowerLeftInputTextureCoordinate  = texcoord.xy + vec2(-texelWidth,  texelHeight);" +
        "lowerRightInputTextureCoordinate = texcoord.xy + vec2( texelWidth,  texelHeight);" +
      "}";

  private static final String FRAGMENT_SHADER =
      "precision lowp float;" +  // ?????????????????

      "uniform lowp sampler2D sTexture;" +
      "uniform mediump mat3 convolutionMatrix;" +

      "varying vec2 upperLeftInputTextureCoordinate;" +
      "varying vec2 upperRightInputTextureCoordinate;" +
      "varying vec2 lowerLeftInputTextureCoordinate;" +
      "varying vec2 lowerRightInputTextureCoordinate;" +

      "void main() {" +
        "float upperLeftIntensity = texture2D(sTexture, upperLeftInputTextureCoordinate).r;" +
        "float upperRightIntensity = texture2D(sTexture, upperRightInputTextureCoordinate).r;" +
        "float lowerLeftIntensity = texture2D(sTexture, lowerLeftInputTextureCoordinate).r;" +
        "float lowerRightIntensity = texture2D(sTexture, lowerRightInputTextureCoordinate).r;" +

        "gl_FragColor = vec4(upperLeftIntensity, upperRightIntensity, lowerLeftIntensity, lowerRightIntensity);" +
      "}";

  private float mTexelWidth = 0.5f / 64f;//1024f;
  private float mTexelHeight = 0.5f / 64f;

  public GlColorPackingShader() {
    super(VERTEX_SHADER, FRAGMENT_SHADER);
  }

  protected String mShaderName = "Color packing";

  public String getName() {
    return mShaderName;
  }

  public float getTexelWidth() {
    return mTexelWidth;
  }

  public void setTexelWidth(float texelWidth) {
    mTexelWidth = texelWidth;
  }

  public float getTexelHeight() {
    return mTexelHeight;
  }

  public void setTexelHeight(float texelHeight) {
    mTexelHeight = texelHeight;
  }

  //////////////////////////////////////////////////////////////////////////

  @Override
  public void onDraw() {
    glUniform1f(getHandle("texelWidth"), mTexelWidth);
    glUniform1f(getHandle("texelHeight"), mTexelHeight);
  }

}

Java Source Code List