fix name of dither function

README.md

@@ -47,7 +47,7 @@ Once the callback has fired, the following methods can be called on the image:
     image.contrast( val ); // adjust the contrast by a value -1 to +1
     image.posterize( n ); // apply a posterization effect with n level
     image.mask( src, x, y ); // masks the image with another Jimp image at x, y using average pixel value
-    image.dither64(); // ordered dithering of the image and reduce color space to 64-bits (RGB565)
+    image.dither565(); // ordered dithering of the image and reduce color space to 16-bits (RGB565)
 
 (Contributions of more methods are welcome!)
 

jimp.js

@@ -960,7 +960,7 @@ Jimp.prototype.getBuffer = function (mime, cb) {
  * @param (optional) cb A callback for when complete
  * @returns this for chaining of methods
  */
-Jimp.prototype.dither64 = function (cb) {
+Jimp.prototype.dither565 = function (cb) {
     var rgb565_matrix = [
       0, 4, 1, 5, 0, 4, 1, 5,
       6, 2, 7, 3, 6, 2, 7, 3,
@@ -984,6 +984,9 @@ Jimp.prototype.dither64 = function (cb) {
     else return this;
 }
 
+// alternative reference
+Jimp.prototype.dither16 = Jimp.prototype.dither565;
+
 /**
  * Writes the image to a file
  * @param path a path to the destination file (either PNG or JPEG)

test/callbacks.js

@@ -15,7 +15,7 @@ var operations = {
     "brightness": [0.75],
     "contrast": [0.75],
     "posterize": [5],
-    "dither64": []
+    "dither565": []
 };
 
 for (var op in operations) process(op);

test/chained.js

@@ -61,7 +61,7 @@ var lenna = new Jimp("lenna.png", function (err) {
         lenna.clone().mask(mask, 0, 0).write("./output/lenna-mask.png");
     });
 
-    this.clone().dither64().write("./output/lenna-64-bit.png");
+    this.clone().dither565().write("./output/lenna-565-bit.png");
 
 
 });