Mon 21 Jul 22:43:21 CEST 2025

js/x11/core/pixmap.js

@@ -0,0 +1,133 @@
+var fs = require('fs');
+
+
+function PixmapFromFile (path,options){
+  if(!options && typeof path == "object"){
+    this.options = path;
+    path = null;
+  }else{
+    this.options = options||{};
+  }
+  if(path){
+    return this.parse(fs.readFileSync(path, {encoding:"utf-8"}));
+  }
+}
+/**
+ *
+ * @param  {[type]}   data     utf-8 file data
+ * @param  {Function} callback optionnal callback.
+ */
+PixmapFromFile.prototype.parse = function (data) {
+  if(!/^\/\*\s*XPM\s*\*\/$/m.test(data)){
+    throw new Error("Not an XPM file");
+  }
+  data=data.replace(/\/\*[^\*]*\*\/\n/g,'');
+  var size = this.getSize(data);
+  var content = this.getArray(data,size);
+  var colors = this.mapColors(data,size);
+  size.data = this.toBuffer(colors,content,size);
+  return size;
+};
+PixmapFromFile.prototype.getSize = function(data){
+  var match = /{\n?"([0-9\s]*)\s?"/.exec(data);
+  if(!match){
+    console.log(data);
+    throw new Error("can't parse size infos");
+  }
+  var values = match[1].split(" ").map(function(i){return parseInt(i)});
+  return {width:values[0],height:values[1],count:values[2],length:values[3]}
+}
+
+PixmapFromFile.prototype.getArray = function(data,size){
+  //var reg = new RegExp('"((?!(?:[0-9]+\\s?){4}).{'+size.length+'}(?!\\sc\\s).*)"',"g"); //Works also but much less simple
+  var reg = new RegExp('"(.{'+size.width*size.length+'})"',"g");
+  var res;
+  var rows = [];
+  while((res = reg.exec(data)) !== null){
+    rows.push(res[1]);
+  }
+  if(rows.length != size.height){
+    throw new Error("found : "+rows.length+" rows. Should have found :"+size.height+" rows.");
+  }
+  return rows;
+}
+// return RGBA color
+PixmapFromFile.prototype.mapColors = function(content,size){
+  var reg = new RegExp('"(.' + ((size.length > 1)? "{"+(size.length)+"}" : "") + ")\\s+c\\s+#?(None|black|white|gray100|[0-9a-fA-F]{6})\"","gm");
+  var res;
+  var colors = {};
+  while((res = reg.exec(content)) !== null){
+    if(res[2] === "None" || res[2] === "black"){
+      colors[res[1]] = "00000000"
+    } else if(res[2] === "white" || res[2] === "gray100"){
+      colors[res[1]] = "FFFFFFFF"
+    } else{
+        colors[res[1]] = res[2]+"FF";//RGBA
+    }
+
+  }
+  if(Object.keys(colors).length != size.count){
+    throw new Error("found : "+Object.keys(colors).length+" colors. Should have found :"+size.count+" colors.");
+  }
+  return colors;
+}
+
+PixmapFromFile.prototype.toBuffer = function (colors,content,size) {
+  var buf = new Buffer(size.width*size.height*4);
+  var offset = 0, byte,color;
+  var copy;
+  if( !this.options.format || this.options.format.toUpperCase() === "BGRA"){
+    copy = this.copyBGRABuffer;
+  }else if(this.options.format && this.options.format.toUpperCase() === "RGBA"){
+    copy = this.copyRGBABuffer;
+  }else{
+    throw new Error("invalid format option : ",this.options.format," valid values are BGRA (default) or RGBA")
+  }
+  content.forEach(function(row){
+    //console.log("parsing : ",row)
+    while(row && row.length >0){
+      var code = row.slice(0,size.length);
+      row = row.slice(size.length);
+      if(!colors[code]){
+        throw new Error("unknown color : ",code);
+      }
+      offset = copy(buf,offset,colors[code]);;
+    }
+  });
+  return buf;
+};
+
+/**
+ * Takes an array of rows. Each char/sequence represents a colored pixel
+ * @param  {[type]} content [description]
+ * @return {Buffer}         A 1d array of pixels in RGBA
+ */
+PixmapFromFile.prototype.copyBGRABuffer = function(buf, offset, color){
+  [4,2,0,6].forEach(function(i){
+    buf.writeUInt8(parseInt(color[i]+color[i+1],16),offset);
+    offset ++;
+  });
+  return offset;
+}
+PixmapFromFile.prototype.copyRGBABuffer = function(buf, offset, color){
+  buf.writeUInt32BE(parseInt(color,16),offset);
+  return offset+4;
+}
+PixmapFromFile.prototype.open = function(path,callback){
+  var self = this;
+   
+  if (callback) fs.readFile(path, {encoding:"utf-8"}, function(err,data){
+    if(err){
+      return callback(err);
+    }else{
+      callback(null,self.parse(data));
+    }
+  }); else {
+    var data = fs.readFileSync(path, {encoding:"utf-8"});
+    return self.parse(data);
+  }
+
+
+}
+
+module.exports = PixmapFromFile;