gitea-mirror/aladin-lite
1
0
Fork 0
mirror of https://github.com/cds-astro/aladin-lite.git synced 2026-01-18 15:57:45 -08:00
Code Issues Packages Projects Releases Wiki Activity
Files
8998d43d998dfbbedd3d271511ee7e6ce3cb0e31
aladin-lite/src/js/ColorMap.js

273 lines
14 KiB
JavaScript
Raw Blame History

// Copyright 2013 - UDS/CNRS
// The Aladin Lite program is distributed under the terms
// of the GNU General Public License version 3.
//
// This file is part of Aladin Lite.
//
// Aladin Lite is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 3 of the License.
//
// Aladin Lite is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// The GNU General Public License is available in COPYING file
// along with Aladin Lite.
//
/******************************************************************************
* Aladin Lite project
*
* File ColorMap.js
*
* Author: Thomas Boch[CDS]
*
*****************************************************************************/
import { AladinUtils } from "./AladinUtils.js";
export let ColorMap = (function() {
// constructor
let ColorMap = function(view) {
this.view = view;
this.reversed = false;
this.mapName = 'native';
this.sig = this.signature();
};
ColorMap.MAPS = {};
ColorMap.MAPS['eosb'] = {
name: 'Eos B',
r: [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,9,18,27,36,45,49,57,72,81,91,100,109,118,127,
136,131,139,163,173,182,191,200,209,218,227,213,221,255,255,255,255,255,
255,255,255,229,229,255,255,255,255,255,255,255,255,229,229,255,255,255,
255,255,255,255,255,229,229,255,255,255,255,255,255,255,255,229,229,255,
255,255,255,255,255,255,255,229,229,255,255,255,255,255,255,255,255,229,
229,255,255,255,255,255,255,255,255,229,229,255,255,255,255,255,255,255,
255,229,229,255,255,255,255,255,255,255,255,229,229,255,253,251,249,247,
245,243,241,215,214,235,234,232,230,228,226,224,222,198,196,216,215,213,
211,209,207,205,203,181,179,197,196,194,192,190,188,186,184,164,162,178,
176,175,173,171,169,167,165,147,145,159,157,156,154,152,150,148,146,130,
128,140,138,137,135,133,131,129,127,113,111,121,119,117,117],
g: [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,15,23,31,39,47,55,57,64,79,87,95,
103,111,119,127,135,129,136,159,167,175,183,191,199,207,215,200,207,239,
247,255,255,255,255,255,255,229,229,255,255,255,255,255,255,255,255,229,
229,255,255,255,255,255,255,255,255,229,229,255,250,246,242,238,233,229,
225,198,195,212,208,204,199,195,191,187,182,160,156,169,165,161,157,153,
148,144,140,122,118,127,125,123,121,119,116,114,112,99,97,106,104,102,
99,97,95,93,91,80,78,84,82,80,78,76,74,72,70,61,59,63,61,59,57,55,53,50,
48,42,40,42,40,38,36,33,31,29,27,22,21,21,19,16,14,12,13,8,6,3,1,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
b: [116,121,127,131,136,140,144,148,153,
157,145,149,170,174,178,182,187,191,195,199,183,187,212,216,221,225,229,
233,238,242,221,225,255,247,239,231,223,215,207,199,172,164,175,167,159,
151,143,135,127,119,100,93,95,87,79,71,63,55,47,39,28,21,15,7,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0]
};
ColorMap.MAPS['rainbow'] = {
name: 'Rainbow',
r: [0,4,9,13,18,22,27,31,36,40,45,50,54,
58,61,64,68,69,72,74,77,79,80,82,83,85,84,86,87,88,86,87,87,87,85,84,84,
84,83,79,78,77,76,71,70,68,66,60,58,55,53,46,43,40,36,33,25,21,16,12,4,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,8,12,21,25,29,33,42,
46,51,55,63,67,72,76,80,89,93,97,101,110,114,119,123,131,135,140,144,153,
157,161,165,169,178,182,187,191,199,203,208,212,221,225,229,233,242,246,
250,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255],
g: [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,4,8,16,21,25,29,38,42,46,51,55,63,67,72,76,84,89,93,97,
106,110,114,119,127,131,135,140,144,152,157,161,165,174,178,182,187,195,
199,203,208,216,220,225,229,233,242,246,250,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,250,242,238,233,229,221,216,212,208,199,195,191,187,178,174,170,165,
161,153,148,144,140,131,127,123,119,110,106,102,97,89,85,80,76,72,63,59,
55,51,42,38,34,29,21,17,12,8,0],
b: [0,3,7,10,14,19,23,28,32,38,43,48,53,
59,63,68,72,77,81,86,91,95,100,104,109,113,118,122,127,132,136,141,145,
150,154,159,163,168,173,177,182,186,191,195,200,204,209,214,218,223,227,
232,236,241,245,250,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,246,242,238,233,225,220,216,212,203,199,195,191,
187,178,174,170,165,157,152,148,144,135,131,127,123,114,110,106,102,97,
89,84,80,76,67,63,59,55,46,42,38,34,25,21,16,12,8,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
};
ColorMap.MAPS['cubehelix'] = {
name: 'Cubehelix',
r: [0,1,3,4,6,8,9,10,12,13,14,15,17,18,
19,20,20,21,22,23,23,24,24,25,25,25,26,26,26,26,26,26,26,26,26,26,26,25,
25,25,25,24,24,24,23,23,23,23,22,22,22,21,21,21,21,21,21,20,20,20,21,21,
21,21,21,22,22,22,23,23,24,25,26,27,27,28,30,31,32,33,35,36,38,39,41,43,
45,47,49,51,53,55,57,60,62,65,67,70,72,75,78,81,83,86,89,92,95,98,101,104,
107,110,113,116,120,123,126,129,132,135,138,141,144,147,150,153,155,158,
161,164,166,169,171,174,176,178,181,183,185,187,189,191,193,194,196,198,
199,201,202,203,204,205,206,207,208,209,209,210,211,211,211,212,212,212,
212,212,212,212,212,211,211,211,210,210,210,209,208,208,207,207,206,205,
205,204,203,203,202,201,201,200,199,199,198,197,197,196,196,195,195,194,
194,194,193,193,193,193,193,193,193,193,193,193,194,194,195,195,196,196,
197,198,199,200,200,202,203,204,205,206,208,209,210,212,213,215,217,218,
220,222,223,225,227,229,231,232,234,236,238,240,242,244,245,247,249,251,
253,255],
g: [0,0,1,1,2,2,3,4,4,5,6,6,7,8,9,10,
11,11,12,13,14,15,17,18,19,20,21,22,24,25,26,28,29,31,32,34,35,37,38,40,
41,43,45,46,48,50,52,53,55,57,58,60,62,64,66,67,69,71,73,74,76,78,79,81,
83,84,86,88,89,91,92,94,95,97,98,99,101,102,103,104,106,107,108,109,110,
111,112,113,114,114,115,116,116,117,118,118,119,119,120,120,120,121,121,
121,121,122,122,122,122,122,122,122,122,122,122,122,122,122,122,122,121,
121,121,121,121,121,121,121,121,120,120,120,120,120,120,120,120,120,120,
121,121,121,121,121,122,122,122,123,123,124,124,125,125,126,127,127,128,
129,130,131,131,132,133,135,136,137,138,139,140,142,143,144,146,147,149,
150,152,154,155,157,158,160,162,164,165,167,169,171,172,174,176,178,180,
182,183,185,187,189,191,193,194,196,198,200,202,203,205,207,208,210,212,
213,215,216,218,219,221,222,224,225,226,228,229,230,231,232,233,235,236,
237,238,239,240,240,241,242,243,244,244,245,246,247,247,248,248,249,250,
250,251,251,252,252,253,253,254,255],
b: [0,1,3,4,6,8,9,11,13,15,17,19,21,23,
25,27,29,31,33,35,37,39,41,43,45,47,48,50,52,54,56,57,59,60,62,63,65,66,
67,69,70,71,72,73,74,74,75,76,76,77,77,77,78,78,78,78,78,78,78,77,77,77,
76,76,75,75,74,73,73,72,71,70,69,68,67,66,66,65,64,63,61,60,59,58,58,57,
56,55,54,53,52,51,51,50,49,49,48,48,47,47,47,46,46,46,46,46,47,47,47,48,
48,49,50,50,51,52,53,55,56,57,59,60,62,64,65,67,69,71,74,76,78,81,83,86,
88,91,94,96,99,102,105,108,111,114,117,120,124,127,130,133,136,140,143,
146,149,153,156,159,162,165,169,172,175,178,181,184,186,189,192,195,197,
200,203,205,207,210,212,214,216,218,220,222,224,226,227,229,230,231,233,
234,235,236,237,238,239,239,240,241,241,242,242,242,243,243,243,243,243,
243,243,243,243,243,242,242,242,242,241,241,241,241,240,240,240,239,239,
239,239,239,238,238,238,238,238,238,238,238,239,239,239,240,240,240,241,
242,242,243,244,245,246,247,248,249,250,252,253,255]
};
ColorMap.MAPS_CUSTOM = ['cubehelix', 'eosb', 'rainbow'];
ColorMap.MAPS_NAMES = ['native', 'grayscale'].concat(ColorMap.MAPS_CUSTOM);
ColorMap.prototype.reverse = function(val) {
if (val) {
this.reversed = val;
}
else {
this.reversed = ! this.reversed;
}
this.sig = this.signature();
this.view.requestRedraw();
};
ColorMap.prototype.signature = function() {
var s = this.mapName;
if (this.reversed) {
s += ' reversed';
}
return s;
};
ColorMap.prototype.update = function(mapName) {
this.mapName = mapName;
this.sig = this.signature();
this.view.requestRedraw();
};
ColorMap.prototype.apply = function(img) {
if ( this.sig=='native' ) {
return img;
}
if (img.cmSig==this.sig) {
return img.cmImg; // return cached pixels
}
var canvas = document.createElement("canvas");
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
var imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
var pixelData = imageData.data;
var length = pixelData.length;
var a, b, c;
var switchCase = 3;
if (this.mapName=='grayscale') {
switchCase = 1;
}
else if (ColorMap.MAPS_CUSTOM.indexOf(this.mapName)>=0) {
switchCase = 2;
}
for (var i = 0; i < length; i+= 4) {
switch(switchCase) {
case 1:
a = b = c = AladinUtils.myRound((pixelData[i]+pixelData[i+1]+pixelData[i+2])/3);
break;
case 2:
if (this.reversed) {
a = ColorMap.MAPS[this.mapName].r[255-pixelData[i]];
b = ColorMap.MAPS[this.mapName].g[255-pixelData[i+1]];
c = ColorMap.MAPS[this.mapName].b[255-pixelData[i+2]];
}
else {
a = ColorMap.MAPS[this.mapName].r[pixelData[i]];
b = ColorMap.MAPS[this.mapName].g[pixelData[i+1]];
c = ColorMap.MAPS[this.mapName].b[pixelData[i+2]];
}
break;
default:
a = pixelData[i];
b = pixelData[i + 1];
c = pixelData[i + 2];
}
if (switchCase!=2 && this.reversed) {
a = 255-a;
b = 255-b;
c = 255-c;
}
pixelData[i] = a;
pixelData[i + 1] = b;
pixelData[i + 2] = c;
}
//imageData.data = pixelData; // not needed, and create an error in strict mode !
ctx.putImageData(imageData, 0, 0);
// cache image with color map applied
img.cmSig = this.sig;
img.cmImg = canvas;
return img.cmImg;
};
return ColorMap;
})();
Reference in New Issue View Git Blame Copy Permalink