Add Basic Data Structures

lib/Dither.dart

@@ -1,18 +1,98 @@
 import 'dart:html';
+import 'dart:typed_data';
 
-class Dither {
+class Pixel {
-  static ImageData editImage(ImageData image) {
+  int x;
+  int y;
+  int r;
+  int g;
+  int b;
+  int a;
+
+  Pixel(this.x, this.y, this.r, this.g, this.b, this.a);
+
+  int getBytePos(int imageWidth) {
+    return (x+y*imageWidth)*4;
+  }
+
+  void setRGB(int r, int g, int b) {
+    this.r = r;
+    this.g = g;
+    this.b = b;
+  }
+
+  @override
+  String toString() {
+    return 'Pixel at $x, $y: {r: $r, g: $g, b: $b, a: $a}';
+  }
 
 
-//  image = contrast( image, 200);
+}
 
-    for (var y = 0; y < image.height; y++) {
+class PixelArray {
-      for (var x = 0; x < image.width; x++) {
+  List<List<Pixel>> pixels;
-//      print(image.getPixel(x, y));
+
+  PixelArray.fromByteArray(Uint8ClampedList array, int imageWidth) {
+    pixels = new List(array.length~/imageWidth~/4);
+    int y = 0;
+    int x = 0;
+    pixels[y] = new List(imageWidth);
+    print(pixels[0].length.toString() + ","+ pixels.length.toString());
+    for (var pos = 0; pos < array.length; pos = pos + 4) {
+      if (x >= imageWidth) {
+        x = 0;
+        y++;
+        pixels[y] = new List(imageWidth);
+      }
+      pixels[y][x] = new Pixel(x, y, array[pos], array[pos+1], array[pos+2], array[pos+3]);
+      x++;
     }
   }
 
-    return image;
+  Uint8ClampedList toByteArray() {
+    //TODO: look for longest array, or each line separately. Only gets width from line 1 currently.
+    Uint8ClampedList result = new Uint8ClampedList(getHeight()*getWidth()*4);
+    int x = 0;
+    int y = 0;
+    for (var i = 0; i < result.length; i = i + 4) {
+      if (x >= getWidth()) {
+        y++;
+        x = 0;
+      }
+      result[i] = pixels[y][x].r;
+      result[i+1] = pixels[y][x].g;
+      result[i+2] = pixels[y][x].b;
+      result[i+3] = pixels[y][x].a;
+
+      x++;
     }
 
+    return result;
+  }
+
+  Pixel getPixel(int x, int y) {
+    return pixels[y][x];
+  }
+
+  void setPixel(Pixel pixel, [int x, int y]) {
+    if (x != null && y != null && pixels[y] != null && pixels[y].length >= x) {
+      pixel.x = x;
+      pixel.y = y;
+      pixels[y][x] = pixel;
+      return;
+    } else if (pixels.length < pixel.y || pixels[y].length < pixel.x) {
+      return;
+    } else {
+      pixels[pixel.y][pixel.x] = pixel;
+      return;
+    }
+  }
+
+  int getWidth() {
+    return pixels[0].length;
+  }
+
+  int getHeight() {
+    return pixels.length;
+  }
 }

web/main.dart

@@ -20,7 +20,6 @@ void imgLoaded(Event e) {
   print("image loaded");
   input.context2D.drawImage(inputImg, 0, 0);
 
-  output.context2D.putImageData( Dither.editImage( getImageData(input)), 0, 0);
 }
 
 ImageData getImageData(CanvasElement canvas) {