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Revision a1b36fc8

Added by Leszek Koltunski over 7 years ago

Simplify BLUR shader.

View differences:

src/main/java/org/distorted/library/EffectQueuePostprocess.java
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import android.content.res.Resources;


  		




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import android.opengl.GLES30;


  		




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import android.opengl.Matrix;


  		




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import org.distorted.library.message.EffectMessage;


  		




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import org.distorted.library.program.DistortedProgram;


  		




  ......




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  private static DistortedFramebuffer mPostBuffer = new DistortedFramebuffer(true,DistortedSurface.TYPE_SYST,1,1);


  		




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                 DistortedFramebuffer mMainBuffer = new DistortedFramebuffer(true,DistortedSurface.TYPE_SYST,1,1);


  		




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  private static float[] mMVPMatrix = new float[16];


  		




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  private static float[] mTmpMatrix = new float[16];


  		




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  // BLUR effect


  		




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  private static final float GAUSSIAN[] =   // G(0.00), G(0.03), G(0.06), ..., G(3.00), 0


  		




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    {                                       // where G(x)= (1/(sqrt(2*PI))) * e^(-(x^2)/2). The last 0 terminates.


  		




  ......




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  private static float[] offsetsCache = new float[MAX_BLUR + MAX_BLUR*MAX_BLUR/4];


  		




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  private static DistortedProgram mBlurProgram;


  		




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  private static int mRadiusH,mOffsetsH,mWeightsH,mObjDH,mMVPMatrixH;


  		




  
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  private static int mRadiusH,mOffsetsH,mWeightsH,mDepthH;


  		




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  private static float[] mWeights = new float[MAX_BLUR];


  		




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  private static float[] mOffsets = new float[MAX_BLUR];


  		




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  // another effect ....


  		




  ......




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    mRadiusH    = GLES30.glGetUniformLocation( blurProgramH, "u_Radius");


  		




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    mOffsetsH   = GLES30.glGetUniformLocation( blurProgramH, "u_Offsets");


  		




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    mWeightsH   = GLES30.glGetUniformLocation( blurProgramH, "u_Weights");


  		




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    mObjDH      = GLES30.glGetUniformLocation( blurProgramH, "u_objD");


  		




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    mMVPMatrixH = GLES30.glGetUniformLocation( blurProgramH, "u_MVPMatrix");


  		




  
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    mDepthH     = GLES30.glGetUniformLocation( blurProgramH, "u_Depth");


  		




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    }


  		




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


  		




  ......




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    if( mNumEffects>0 && compute(time) )


  		




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      {


  		




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      mMainBuffer.setAsInput();


  		




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      Matrix.setIdentityM(mTmpMatrix, 0);


  		




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      Matrix.translateM(mTmpMatrix, 0, 0, 0, -surface.mDistance);


  		




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      Matrix.multiplyMM(mMVPMatrix, 0, surface.mProjectionMatrix, 0, mTmpMatrix, 0);


  		




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      float w = surface.mWidth;


  		




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      float h = surface.mHeight;


  		




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      mBlurProgram.useProgram();


  		




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      int radius = (int)mUniforms[0];


  		




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      if( radius>=MAX_BLUR ) radius = MAX_BLUR-1;


  		




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      computeGaussianKernel(radius);


  		




  ......




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      radius = (radius+1)/2;


  		




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      for(int i=0; i<=radius; i++) mOffsets[i] = offsetsCache[offset+i]/h;


  		




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      GLES30.glUniform1fv( mWeightsH, radius+1, weightsCache,offset);


  		




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      GLES30.glUniform1i( mRadiusH, radius);


  		




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      GLES30.glUniform2f( mObjDH , w, h );


  		




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      mPostBuffer.resizeFast( (int)w, (int)h);


  		




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      mPostBuffer.setAsOutput(time);


  		




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      GLES30.glViewport(0, 0, (int)w, (int)h);


  		




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      Matrix.setIdentityM(mTmpMatrix, 0);


  		




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      Matrix.translateM(mTmpMatrix, 0, 0, 0, -mPostBuffer.mDistance);


  		




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      Matrix.multiplyMM(mMVPMatrix, 0, mPostBuffer.mProjectionMatrix, 0, mTmpMatrix, 0);


  		




  
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      mBlurProgram.useProgram();


  		




  
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      GLES30.glUniform1fv( mWeightsH, radius+1, weightsCache,offset);


  		




  
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      GLES30.glUniform1i( mRadiusH, radius);


  		




  
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      GLES30.glUniform1f( mDepthH , 1.0f-surface.mNear);


  		




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      // horizontal blur


  		




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      GLES30.glUniform1fv( mOffsetsH ,radius+1, mOffsets,0);


  		




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      GLES30.glUniformMatrix4fv(mMVPMatrixH, 1, false, mMVPMatrix , 0);


  		




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      GLES30.glVertexAttribPointer(mBlurProgram.mAttribute[0], POS_DATA_SIZE, GLES30.GL_FLOAT, false, 0, mQuadPositions);


  		




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      GLES30.glVertexAttribPointer(mBlurProgram.mAttribute[1], TEX_DATA_SIZE, GLES30.GL_FLOAT, false, 0, mQuadTextureInv);


  		




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      GLES30.glDrawArrays(GLES30.GL_TRIANGLE_STRIP, 0, 4);


  		












  

    
      src/main/res/raw/blit_fragment_shader.glsl
    
  





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


  		




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precision lowp float;


  		




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uniform sampler2D u_Texture;  // The input texture.


  		




  
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varying vec2 v_TexCoordinate; // Interpolated texture coordinate per fragment.


  		




  
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uniform sampler2D u_Texture;  // The input texture.


  		




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


  		




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      src/main/res/raw/blur_vertex_shader.glsl
    
  





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precision lowp float;


  		




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uniform vec2 u_objD;             // object width X object height.


  		




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uniform mat4 u_MVPMatrix;        // the combined model/view/projection matrix.


  		




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attribute vec2 a_Position;       // Per-vertex position information we will pass in.


  		




  
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uniform float u_Depth;           // distance from the near plane to render plane, in clip coords


  		




  
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attribute vec2 a_Position;       // Per-vertex position.


  		




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attribute vec2 a_TexCoordinate;  // Per-vertex texture coordinate information we will pass in.


  		




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varying   vec2 v_TexCoordinate;  //


  		




  
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varying vec2 v_TexCoordinate;    //


  		




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


  		




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// empty 2D vertex shader for postprocessing


  		




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void main()


  		




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  {


  		




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  v_TexCoordinate = a_TexCoordinate;


  		




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  gl_Position     = u_MVPMatrix*vec4( u_objD*a_Position, 0.0, 1.0);


  		




  
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  gl_Position     = vec4(2.0*a_Position,u_Depth,1.0);


  		




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  }


  		












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