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Revision bbf09f75

Added by Leszek Koltunski over 7 years ago

Progress with TransferFeedback app - introduce two modes: USEPOINTS 'true' or 'false'.

On Nexus5X, it works with 'true' and 'false'. On Nexus 4, it works with 'true', but returns GL_INVALID_OPERATION with 'false'.

View differences:

src/main/java/org/distorted/examples/feedback/FeedbackRenderer.java
22 22 
import android.content.res.Resources;
23 23 
import android.opengl.GLES30;
24 24 
import android.opengl.GLSurfaceView;
25 
import android.util.Log;
26 25 

  		




  27
  26
  
    
import org.distorted.library.Distorted;


  		




  28
  27
  
    
import org.distorted.library.program.DistortedProgram;


  		




  ......




  41
  40
  
    
class FeedbackRenderer implements GLSurfaceView.Renderer


  		




  42
  41
  
    
{


  		




  43
  42
  
    
    private final int BYTESFLOAT = 4;


  		




  
  43
  
    
    private final int POSITION   = 3;


  		




  
  44
  
    

  		




  
  45
  
    
    private final boolean USEPOINTS=false;


  		




  44
  46
  
    

  		




  45
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    private GLSurfaceView mView;


  		




  46
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    private DistortedProgram mFeedbackProgram;


  		




  47
  
  
    
    private int mBufferLength;


  		




  
  49
  
    
    private int mVertices;


  		




  48
  50
  
    
    private int[] mVBO, mTBO;


  		




  49
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  50
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///////////////////////////////////////////////////////////////////////////////////////////////////


  		




  ......




  60
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      {


  		




  61
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      mFeedbackProgram.useProgram();


  		




  62
  64
  
    

  		




  
  65
  
    
      int numVertices = (USEPOINTS ? mVertices : 3*(mVertices-2));


  		




  
  66
  
    

  		




  63
  67
  
    
      GLES30.glBindBuffer(GLES30.GL_ARRAY_BUFFER, mVBO[0]);


  		




  64
  
  
    
      GLES30.glVertexAttribPointer(mFeedbackProgram.mAttribute[0], 1, GLES30.GL_FLOAT, false, 0, 0);


  		




  
  68
  
    
      GLES30.glVertexAttribPointer(mFeedbackProgram.mAttribute[0], USEPOINTS ? 1:POSITION, GLES30.GL_FLOAT, false, 0, 0);


  		




  65
  69
  
    
      GLES30.glBindBufferBase(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER, 0, mTBO[0]);


  		




  66
  70
  
    

  		




  67
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      GLES30.glEnable(GLES30.GL_RASTERIZER_DISCARD);


  		




  68
  
  
    
      GLES30.glBeginTransformFeedback(GLES30.GL_POINTS);


  		




  69
  
  
    
      GLES30.glDrawArrays(GLES30.GL_POINTS, 0, mBufferLength);


  		




  
  72
  
    
      GLES30.glBeginTransformFeedback( USEPOINTS ? GLES30.GL_POINTS : GLES30.GL_TRIANGLES);


  		




  
  73
  
    
      GLES30.glDrawArrays( USEPOINTS ? GLES30.GL_POINTS : GLES30.GL_TRIANGLE_STRIP, 0, USEPOINTS ? mVertices*POSITION : mVertices);


  		




  70
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      GLES30.glEndTransformFeedback();


  		




  71
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      GLES30.glDisable(GLES30.GL_RASTERIZER_DISCARD);


  		




  72
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      GLES30.glFlush();


  		




  73
  77
  
    

  		




  74
  
  
    
      Buffer mappedBuffer =  GLES30.glMapBufferRange(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER, 0, mBufferLength*BYTESFLOAT, GLES30.GL_MAP_READ_BIT);


  		




  
  78
  
    
      Buffer mappedBuffer =  GLES30.glMapBufferRange(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER, 0, numVertices*POSITION*BYTESFLOAT, GLES30.GL_MAP_READ_BIT);


  		




  
  79
  
    
      FloatBuffer fb = ((ByteBuffer) mappedBuffer).order(ByteOrder.nativeOrder()).asFloatBuffer();


  		




  
  80
  
    
      String msg = "";


  		




  75
  81
  
    

  		




  76
  
  
    
      if (mappedBuffer!=null)


  		




  77
  
  
    
        {


  		




  78
  
  
    
        FloatBuffer fb = ((ByteBuffer) mappedBuffer).order(ByteOrder.nativeOrder()).asFloatBuffer();


  		




  79
  
  
    
        Log.d( "Feedback", String.format("values = %.2f %.2f %.2f %.2f %.2f %.2f\n",  fb.get(), fb.get(), fb.get(), fb.get(), fb.get(), fb.get() ));


  		




  80
  
  
    
        }


  		




  
  82
  
    
      for(int i=0; i<numVertices*POSITION; i++) msg += (" "+fb.get(i));


  		




  
  83
  
    

  		




  
  84
  
    
      android.util.Log.d( "Feedback", msg);


  		




  81
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  82
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      GLES30.glUnmapBuffer(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER);


  		




  83
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      GLES30.glBindBuffer(GLES30.GL_ARRAY_BUFFER, 0);


  		




  ......




  111
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      String header= "#version 300 es\n";


  		




  112
  116
  
    
      String[] feedback = { "outValue" };


  		




  113
  117
  
    

  		




  
  118
  
    
      if(USEPOINTS)


  		




  
  119
  
    
        {


  		




  
  120
  
    
        header += "#define USEPOINTS 1\n";


  		




  
  121
  
    
        }


  		




  
  122
  
    
      else


  		




  
  123
  
    
        {


  		




  
  124
  
    
        header += "#define USEPOINTS 0\n";


  		




  
  125
  
    
        }


  		




  
  126
  
    

  		




  114
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      try


  		




  115
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        {


  		




  116
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        mFeedbackProgram = new DistortedProgram(vertStream,fragStream, header, header, glsl, feedback );


  		




  117
  130
  
    
        }


  		




  118
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      catch(Exception ex)


  		




  119
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        {


  		




  120
  
  
    
        Log.e("TransformFeedback", "exception creating feedback program: "+ex.getMessage());


  		




  
  133
  
    
        android.util.Log.e("Feedback", "exception creating feedback program: "+ex.getMessage());


  		




  121
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        }


  		




  122
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  123
  
  
    
      float[] floatData = { 1.0f, 4.0f, 9.0f, 16.0f, 25.0f, 100.0f };


  		




  124
  
  
    
      mBufferLength = floatData.length;


  		




  125
  
  
    
      FloatBuffer data = ByteBuffer.allocateDirect(mBufferLength*BYTESFLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer();


  		




  
  136
  
    
      float[] floatData = { 1.0f,4.0f,9.0f, 16.0f,25.0f,36.0f, 49.0f,64.0f,81.0f,  100.0f,121.0f,144.0f};


  		




  
  137
  
    
      mVertices = floatData.length/POSITION;


  		




  
  138
  
    
      FloatBuffer data = ByteBuffer.allocateDirect(mVertices*POSITION*BYTESFLOAT).order(ByteOrder.nativeOrder()).asFloatBuffer();


  		




  126
  139
  
    
      data.put(floatData).position(0);


  		




  127
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  128
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      mVBO = new int[1];


  		




  129
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      GLES30.glGenBuffers(1, mVBO, 0);


  		




  130
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      GLES30.glBindBuffer(GLES30.GL_ARRAY_BUFFER, mVBO[0]);


  		




  131
  
  
    
      GLES30.glBufferData(GLES30.GL_ARRAY_BUFFER, mBufferLength*BYTESFLOAT, data, GLES30.GL_STATIC_READ);


  		




  
  144
  
    
      GLES30.glBufferData(GLES30.GL_ARRAY_BUFFER, mVertices*POSITION*BYTESFLOAT, data, GLES30.GL_STATIC_READ);


  		




  132
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      GLES30.glBindBuffer(GLES30.GL_ARRAY_BUFFER, 0);


  		




  133
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  147
  
    
      int numVertices = (USEPOINTS ? mVertices : 3*(mVertices-2));


  		




  
  148
  
    

  		




  134
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      mTBO = new int[1];


  		




  135
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      GLES30.glGenBuffers(1, mTBO, 0);


  		




  136
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      GLES30.glBindBuffer(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER, mTBO[0]);


  		




  137
  
  
    
      GLES30.glBufferData(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER, mBufferLength*BYTESFLOAT, null, GLES30.GL_STATIC_READ);


  		




  
  152
  
    
      GLES30.glBufferData(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER, numVertices*POSITION*BYTESFLOAT, null, GLES30.GL_STATIC_READ);


  		




  138
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      GLES30.glBindBuffer(GLES30.GL_TRANSFORM_FEEDBACK_BUFFER, 0);


  		




  139
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      }


  		




  140
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}


  		












  

    
      src/main/java/org/distorted/examples/monalisa/MonaLisaRenderer.java
    
  





  137
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      if( mTexture==null ) mTexture = new DistortedTexture(bmpWidth,bmpHeight);


  		




  138
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  139
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      // likewise the Mesh


  		




  140
  
  
    
      if( mMesh==null ) mMesh = new MeshFlat(1,1);//(9,9*bmpHeight/bmpWidth);


  		




  
  140
  
    
      if( mMesh==null ) mMesh = new MeshFlat(2,2);//(9,9*bmpHeight/bmpWidth);


  		




  141
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  142
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      // even if mTexture wasn't null, we still need to call setTexture() on it


  		




  143
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      // because every time activity goes to background, its OpenGL resources


  		












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