Calculating Histogram Using Rsatomicinc In Renderscript Only Returns Address Instead Of The Count

I am trying to write a program for histogram calculation. So i have created a random array of 10 numbers treating it as the image array in 1D. The following is my renderscript and

Solution 1:

-1- I tested your code on API 19 and Nexus 5 and I see that difference[] prints are coming out correctly. My Java code is the same as yours, below is the script code with some minor differences.

#pragma version(1)#pragma rs java_package_name(com.clearvision.androidapps.clearview)#pragma rs_fp_fullvolatileint32_t *gOutarray;
rs_allocation gIn;
rs_allocation gOut;
rs_script gScript; 

  voidroot(constint32_t *v_in, int32_t *v_out, constvoid *usrData, uint32_t x,  uint32_t y){
      int32_t lum=*v_in;
      rsDebug("present value:", *v_in);
      volatileint32_t* addr=gOutarray + lum;
      //rsDebug("present gOutarray address:", *gOutarray);rsDebug("present address:", *addr);
      rsAtomicInc(addr);  
  }  

 voidincrement(){
        rsForEach(gScript, gIn, gOut); 
} 

-2- I was previously incorrect. Below code is fine.

volatileint32_t* addr=gOutarray + lum;

-3- Your logcat probably shows error because of the following

for(int i=0;i<10;i++){
        log("generated histogram counts:"+difference[i]);
    }

difference array is defined with 6 int elements, while you are looping till 10. This is a problem.

Can you recheck?