src/main/java/eu/svjatoslav/imagesqueeze/codec/OperatingContext.java

   1 package eu.svjatoslav.imagesqueeze.codec;
   2
   3 public class OperatingContext {
   4
   5         Image image;
   6         byte[] yMap;
   7         byte[] uMap;
   8         byte[] vMap;
   9         ColorStats colorStats = new ColorStats();
  10
  11         public OperatingContext(){
  12         }
  13
  14         public void initialize(Image image, byte [] brightnessMap, byte [] colornessMap, byte [] colorMap){
  15                 this.image = image;
  16                 this.yMap = brightnessMap;
  17                 this.uMap = colornessMap;
  18                 this.vMap = colorMap;
  19
  20                 colorStats.reset();
  21         }
  22
  23         public void measureNeighborEncode(int x, int y){
  24                 if ((y >= 0) && (y < image.metaData.height) && (x >= 0) && (x < image.metaData.width)){
  25
  26                         int neighborIndex = y * image.metaData.width + x;
  27
  28                         colorStats.ySum = colorStats.ySum + ImageEncoder.byteToInt(yMap[neighborIndex]);
  29                         colorStats.uSum = colorStats.uSum + ImageEncoder.byteToInt(uMap[neighborIndex]);
  30                         colorStats.vSum = colorStats.vSum + ImageEncoder.byteToInt(vMap[neighborIndex]);
  31                         colorStats.pixelCount++;
  32                 }
  33         }
  34
  35         public int getYRange(int index){
  36                 int brightness = ImageEncoder.byteToInt(yMap[index]);
  37                 return Math.abs(brightness - colorStats.getAverageY());
  38         }
  39
  40         public int getURange(int index){
  41                 int colorness = ImageEncoder.byteToInt(uMap[index]);
  42                 return Math.abs(colorness - colorStats.getAverageU());
  43         }
  44
  45         public int getVRange(int index){
  46                 int color = ImageEncoder.byteToInt(vMap[index]);
  47                 return Math.abs(color - colorStats.getAverageV());
  48         }
  49
  50
  51 }