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Revision 0d81d0fb

Added by Leszek Koltunski over 7 years ago

Separable Box blur (almost) works.

View differences:

src/main/java/org/distorted/library/EffectQueuePostprocess.java
42 42 

  		




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class EffectQueuePostprocess extends EffectQueue


  		




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  {


  		




  
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  private static final int MAX_BLUR = 50;


  		




  
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  private static final int POSITION_DATA_SIZE= 2; // Post Program: size of the position data in elements


  		




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  private static final int TEX_DATA_SIZE     = 2; // Post Program: size of the texture coordinate data in elements.


  		




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  ......




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  private static final int NUM_CACHE    = 0;


  		




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  private static final int INDEX = EffectTypes.POSTPROCESS.ordinal();


  		




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  private static int mRadiusH;


  		




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  private static int mOneOverH;


  		




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  private static int mObjDH;


  		




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  private static int mMVPMatrixH;


  		




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  private static final FloatBuffer mQuadPositions, mQuadTexture;


  		




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  private static DistortedProgram mBlurProgram;


  		




  
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  private static final FloatBuffer mQuadPositions, mQuadTexture1, mQuadTexture2;


  		




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  static


  		




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    {


  		




  ......




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    int bytes_per_float = 4;


  		




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    float[] positionData= { -0.5f, -0.5f,  -0.5f, 0.5f,  0.5f,-0.5f,  0.5f, 0.5f };


  		




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    float[] textureData = {  0.0f,  0.0f,   0.0f, 1.0f,  1.0f, 0.0f,  1.0f, 1.0f };


  		




  
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    float[] textureData1= {  0.0f,  0.0f,   0.0f, 1.0f,  1.0f, 0.0f,  1.0f, 1.0f };


  		




  
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    float[] textureData2= {  0.0f,  0.0f,   1.0f, 0.0f,  0.0f, 1.0f,  1.0f, 1.0f };


  		




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    mQuadPositions = ByteBuffer.allocateDirect(POSITION_DATA_SIZE*dataLength*bytes_per_float).order(ByteOrder.nativeOrder()).asFloatBuffer();


  		




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    mQuadPositions.put(positionData).position(0);


  		




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    mQuadTexture   = ByteBuffer.allocateDirect(TEX_DATA_SIZE     *dataLength*bytes_per_float).order(ByteOrder.nativeOrder()).asFloatBuffer();


  		




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    mQuadTexture.put(textureData).position(0);


  		




  
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    mQuadTexture1  = ByteBuffer.allocateDirect(TEX_DATA_SIZE     *dataLength*bytes_per_float).order(ByteOrder.nativeOrder()).asFloatBuffer();


  		




  
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    mQuadTexture1.put(textureData1).position(0);


  		




  
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    mQuadTexture2  = ByteBuffer.allocateDirect(TEX_DATA_SIZE     *dataLength*bytes_per_float).order(ByteOrder.nativeOrder()).asFloatBuffer();


  		




  
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    mQuadTexture2.put(textureData2).position(0);


  		




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    }


  		




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  private static DistortedFramebuffer mBufferFBO = new DistortedFramebuffer(1,1);


  		




  
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  // BLUR effect


  		




  
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  private static DistortedProgram mBlurProgram;


  		




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


  		




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


  		




  
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  // another effect ....


  		




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


  		




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  EffectQueuePostprocess(long id)


  		




  ......




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    final InputStream postVertexStream   = resources.openRawResource(R.raw.blur_vertex_shader);


  		




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    final InputStream postFragmentStream = resources.openRawResource(R.raw.blur_fragment_shader);


  		




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    mBlurProgram = new DistortedProgram(postVertexStream,postFragmentStream, "", "");


  		




  
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    mBlurProgram = new DistortedProgram(postVertexStream,postFragmentStream,


  		




  
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                                        "#version 100\n",


  		




  
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                                        "#version 100\n#define MAX_BLUR "+MAX_BLUR);


  		




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    int blurProgramH = mBlurProgram.getProgramHandle();


  		




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


  		




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    mOneOverH   = GLES30.glGetUniformLocation( blurProgramH, "one_over_objD");


  		




  
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    mStepH      = GLES30.glGetUniformLocation( blurProgramH, "u_Step");


  		




  
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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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    }


  		




  ......




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  synchronized void render(float w, float h, float[] mvp, DistortedFramebuffer df)


  		




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    {


  		




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    mBlurProgram.useProgram();


  		




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    df.setAsOutput();


  		




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    GLES30.glUniform1f( mRadiusH, mUniforms[0]);


  		




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    GLES30.glUniform2f( mOneOverH, 1/w,1/h);


  		




  
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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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    for(int i=0; i<=radius; i++)


  		




  
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      {


  		




  
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      mWeights[i] = 1.0f / (2.0f*radius+1.0f);


  		




  
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      }


  		




  
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    GLES30.glUniform1fv( mWeightsH, radius+1, mWeights,0);


  		




  
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    GLES30.glUniform1i( mRadiusH, radius);


  		




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    GLES30.glUniform2f( mObjDH , w, h );


  		




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


  		




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    mBufferFBO.resizeFast(df.mWidth, df.mHeight);


  		




  
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    mBufferFBO.setAsOutput();


  		




  
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    // horizontal blur


  		




  
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    GLES30.glUniform1f( mStepH , 1/h );


  		




  
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    GLES30.glVertexAttribPointer(mBlurProgram.mAttribute[0], POSITION_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, mQuadTexture2);


  		




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


  		




  
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    mBufferFBO.setAsInput();


  		




  
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    df.setAsOutput();


  		




  
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    // vertical blur


  		




  
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    GLES30.glUniform1f( mStepH , 1/w );


  		




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    GLES30.glVertexAttribPointer(mBlurProgram.mAttribute[0], POSITION_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, mQuadTexture);


  		




  
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    GLES30.glVertexAttribPointer(mBlurProgram.mAttribute[1], TEX_DATA_SIZE     , GLES30.GL_FLOAT, false, 0, mQuadTexture2);


  		




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


  		




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    }


  		




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      src/main/res/raw/blur_fragment_shader.glsl
    
  





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varying vec2 v_TexCoordinate;


  		




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uniform sampler2D u_Texture;


  		




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uniform vec2 one_over_objD;


  		




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uniform float u_Radius;


  		




  
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uniform float u_Step;


  		




  
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uniform float u_Weights[MAX_BLUR];


  		




  
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uniform int u_Radius;


  		




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


  		




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void main()


  		




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  {


  		




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  vec2 tex;


  		




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  vec4 pixel = vec4(0.0);


  		




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  float denom = 1.0 / ((2.0*u_Radius+1.0)*(2.0*u_Radius+1.0));


  		




  
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  float lCoord = v_TexCoordinate.x;


  		




  
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  float rCoord = lCoord;


  		




  
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  float yCoord = v_TexCoordinate.y;


  		




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  for (float x = -u_Radius; x <= u_Radius; x+=1.0)


  		




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    for (float y = -u_Radius; y <= u_Radius; y+=1.0)


  		




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      {


  		




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      tex = vec2(v_TexCoordinate.x + x*one_over_objD.x, v_TexCoordinate.y + y*one_over_objD.y);


  		




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      pixel += texture2D(u_Texture,tex)*denom;


  		




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      }


  		




  
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  vec4  pixel  = texture2D(u_Texture,vec2(lCoord,yCoord)) * u_Weights[0];


  		




  
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  for (int x = 1; x <= u_Radius; x+=1)


  		




  
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    {


  		




  
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    rCoord+= u_Step;


  		




  
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    lCoord-= u_Step;


  		




  
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    pixel += ( texture2D(u_Texture,vec2(rCoord,yCoord)) +


  		




  
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               texture2D(u_Texture,vec2(lCoord,yCoord)) ) * u_Weights[x];


  		




  
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    }


  		




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  gl_FragColor = pixel;


  		




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  }


  		












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