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Preserve transparency when converting SVG #117

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Preserve transparency when converting SVG #117

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Preserve transparency when converting SVG
Redsandro Dec 17, 2013
2d18d9d
Added option extent to allow resizing plus extending the canvas to fi…
Redsandro Dec 20, 2013
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25 changes: 22 additions & 3 deletions imagemagick.js
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Original file line number Diff line number Diff line change
@@ -1,5 +1,8 @@
var childproc = require('child_process'),
EventEmitter = require('events').EventEmitter;
EventEmitter = require('events').EventEmitter,
util = require('util');

var debug = true; // Show command used for convert


function exec2(file, args /*, options, callback */) {
Expand Down Expand Up @@ -350,7 +353,9 @@ exports.resizeArgs = function(options) {
filter: 'Lagrange',
sharpening: 0.2,
customArgs: [],
timeout: 0
timeout: 0,
background: 'none',
extent: false
}

// check options
Expand All @@ -371,7 +376,12 @@ exports.resizeArgs = function(options) {
throw new Error('both width and height can not be 0 (zero)');

// build args
var args = [opt.srcPath];
var args = [];
if (opt.background) { // Needs to be added _before_ input file
args.push('-background');
args.push(opt.background);
}
args.push(opt.srcPath);
if (opt.sharpening > 0) {
args = args.concat([
'-set', 'option:filter:blur', String(1.0-opt.sharpening)]);
Expand All @@ -389,6 +399,12 @@ exports.resizeArgs = function(options) {
else if (opt.width === 0) args.push('x'+String(opt.height));
else args.push(String(opt.width)+'x'+String(opt.height));
}
if (opt.extent && opt.width && opt.height) {
args.push('-gravity');
args.push('center');
args.push('-extent');
args.push(String(opt.width)+'x'+String(opt.height));
}
opt.format = opt.format.toLowerCase();
var isJPEG = (opt.format === 'jpg' || opt.format === 'jpeg');
if (isJPEG && opt.progressive) {
Expand All @@ -410,6 +426,9 @@ exports.resizeArgs = function(options) {
if (Array.isArray(opt.customArgs) && opt.customArgs.length)
args = args.concat(opt.customArgs);
args.push(opt.dstPath);

if (debug)
util.log('convert ' + args.join(' '));

return {opt:opt, args:args};
}