ncb000gt / merlin

C++ Bindings to GraphicsMagick for NodeJS.

Merlin - ImageMagick bindings for node.js

Usage

var merlin = require('merlin');
// create a new MerlinImage with a node Buffer containing data from an image
var image = new merlin.MerlinImage(buffer);
var new_image = image.resize(300, 400);
// operations can be chained
var new_image = new_image.negative().crop(100, 100, 0, 0);
// when finished, get the buffer from the image
res.write(new_image.getBuffer());

Supported Operations

MerlinImage.blur(/*double*/ radius, /*double*/ sigma)
MerlinImage.charcoal(/*double*/ radius, /*double*/ sigma)
MerlinImage.chop(/*int*/ width, /*int*/ height, /*int*/ xoffset, /*int*/ yoffset)
MerlinImage.clip()
MerlinImage.clipPath(/*String*/ pathname, /*int*/ inside)
MerlinImage.crop(/*int*/ width, /*int*/ height, /*int*/ xoffset, /*int*/ yoffset)
MerlinImage.mosaic(/*MerlinImage*/ image0[,/*MerlinImage*/ image1.../*MerlinImage*/ imageN])
MerlinImage.negative()
MerlinImage.resize(/*int*/ width, /*int*/ height)
MerlinImage.rotate(/*double*/ degrees)

More to come!

merlin's Issues

ability to sharpen images

In my experience sharpening an image after sizing it down, even a sharpen of 10%, greatly improves the clarity and appearance of an image. +1 for sharpening

ability to handle images not invovling the database

For neat people who just want to use this as a manipulation library and not be tied to a db, having the ability to just manipulate images would be handy. Like pass in a stream / file object and get back a stream / file object. Alternately, just being able to point to a filesystem image and write back to filesystem images would have the same effect I'm looking for.

(semaphore_info != (SemaphoreInfo *) NULL)

With this simple script:

var merlin = require("merlin");
var fs = require("fs");

fs.readFile("test/fixtures/matador.jpg", function(err, data) {
  var img = new merlin.MerlinImage(data);
  var newImg = img.resize(200, 200);
})

I get this error:

Assertion failed: (semaphore_info != (SemaphoreInfo *) NULL), function LockSemaphoreInfo, file magick/semaphore.c, line 525.
[1]    86612 abort      node merlin.js

Node: 0.2.1
GraphicsMagick: 1.3.12
Merlin: 686de4b
Mac OS X 10.6

You can hit me up on IRC as well, harryv in the node channel.

Look for GraphicsMagick-config

I have installed GraphicsMagick on Mac OS X via Homebrew. I had to change wscript to look for GraphicsMagick-config and GraphicsMagickWand-config instead of Magick-config and MagickWand-config.

Error handling is pretty dodgy.

Should be checking params and returning exceptions when things fail.