percent.c

#ifdef __ANDROID__
#include "jni.h"
#include "android/log.h"
#define LOG_TAG "psx"
#define PRINTMSGS(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)

#endif
#include <stdio.h>
#include <stdlib.h>
#include <math.h>


JNIEXPORT jfloat JNICALL
Java_com_mofirst_launcher_Launcher_getPercentage(JNIEnv *env, jclass obj, jintArray arr, jint w, jint h){
  jsize len = (*env)->GetArrayLength(env, arr);
  int i = 0, colorPixel = 0, right_corner_pixel =0, left_corner_pixel = 0;
  float percentage = 0.0f;
  clock_t start, end;
  int left = 100, right = 0, top = 100, bottom = 0;
  start = clock();
  jint *body = (*env)->GetIntArrayElements(env, arr, 0);
  for (i=0; i<len; i++) {
    if((body[i] >> 24) != 0){ 
        colorPixel++;
        if(top > i/h) top = i;
        if(bottom < i/h) bottom = i;
        if(left > i%h) left=i;
        if(right < i%h) right=i;
    }

  }

  int shape =0;
  if((float)abs(bottom-top) / abs(right-left) > 0.9f)
            shape = 100;

  percentage = (float)colorPixel/len;

  (*env)->ReleaseIntArrayElements(env, arr, body, 0);
  end = clock();
  return percentage + shape;
}