* add max_sub option

* update test code and perf
* update preview image

Author: xVan Turing

.vscode/c_cpp_properties.json

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 2.8)
-
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
 project(cquant)

CMakeLists.txt

@@ -3,9 +3,8 @@
 [![Build Status](https://travis-ci.org/xVanTuring/cquant.svg?branch=master)](https://travis-ci.org/xVanTuring/cquant)
 ## View Latest Doc on [Github](https://github.com/xVanTuring/cquant)
 ## Preview
-<!-- ![Ori]() -->
-<img src="./img/3.jpg" width="700px" style="margin:0 auto; display:block">
-<img src="./img/result.png" width="500px" style="margin:0 auto; display:block">
+![Screenshot from 2019-02-09 15-16-53.png](https://i.loli.net/2019/02/09/5c5e7e7b2d278.png)
+![Screenshot from 2019-02-09 15-16-32.png](https://i.loli.net/2019/02/09/5c5e7e7b42cd2.png)
 
 ## Usage
 > Current Supported Prebuild binary version: Node 6 | 8 | 10 | 11 \

README.md

@@ -1,5 +1,5 @@
-0. add test 
-1. add para for subsampling
+0. ~~add test~~
+1. ~~add para for subsampling~~
 2. use typescript wrapper
-3. add travis-ci
+3. ~~add travis-ci~~
 4. remove rgba or not 

TODO.md

@@ -0,0 +1 @@
+./build/compile_commands.json

compile_commands.json

@@ -1,14 +1,14 @@
 const addon = require('bindings')('cquant')
-function paletteAsync (buffer, depth, maxColor = 5, callback = null) {
+function paletteAsync(buffer, depth, maxColor = 5, maxSub = 0, callback = null) {
   if (callback == null) {
     if (depth !== 3 && depth !== 4) {
-      return Promise.reject(new Error('Wrong Depth'));
+      return Promise.reject(new Error('Wrong depth!'));
     }
     if (maxColor <= 1 || maxColor > 256) {
-      return Promise.reject(new Error('maxColor too small or too large'));
+      return Promise.reject(new Error('maxColor too small or too large!'));
     }
     return new Promise((res, rej) => {
-      addon.PaletteAsync(buffer, maxColor, depth, (err, val) => {
+      addon.PaletteAsync(buffer, maxColor, depth, maxSub, (err, val) => {
         if (err) {
           rej(err)
         } else {
@@ -18,14 +18,14 @@ function paletteAsync (buffer, depth, maxColor = 5, callback = null) {
     })
   } else {
     if (depth !== 3 && depth !== 4) {
-      callback(new Error('Wrong Depth'));
+      callback(new Error('Wrong depth!'));
       return;
     }
     if (maxColor <= 1 || maxColor > 256) {
-      callback(new Error('maxColor too small or too large'))
+      callback(new Error('maxColor too small or too large!'))
       return
     }
-    addon.PaletteAsync(buffer, maxColor, depth, callback)
+    addon.PaletteAsync(buffer, maxColor, depth, maxSub, callback)
   }
 }
 module.exports = {

cquant.js

@@ -0,0 +1,23 @@
+
+<style>
+    .color {
+        width: 100px;
+        height: 100px;
+        float: left;
+    }
+    img{
+      width: 500px;
+      display: block;
+    }
+</style>
+<img src="large.1.jpg"/><div class="color" style="background-color:rgb(75,84,81)">
+
+  </div> <div class="color" style="background-color:rgb(223,208,201)">
+
+  </div> <div class="color" style="background-color:rgb(155,152,153)">
+
+  </div> <div class="color" style="background-color:rgb(174,182,188)">
+
+  </div> <div class="color" style="background-color:rgb(172,180,177)">
+
+  </div>

img/0.jpg img/large.1.jpgimg/0.jpg renamed to img/large.1.jpg

@@ -0,0 +1,23 @@
+
+<style>
+    .color {
+        width: 100px;
+        height: 100px;
+        float: left;
+    }
+    img{
+      width: 500px;
+      display: block;
+    }
+</style>
+<img src="large.1.png"/><div class="color" style="background-color:rgb(76,84,81)">
+
+  </div> <div class="color" style="background-color:rgb(223,208,201)">
+
+  </div> <div class="color" style="background-color:rgb(154,151,151)">
+
+  </div> <div class="color" style="background-color:rgb(170,175,182)">
+
+  </div> <div class="color" style="background-color:rgb(177,188,188)">
+
+  </div>