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minor tng update

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This commit is contained in:
Christopher Jeffrey 2015-06-29 03:46:52 -07:00
parent 60c54590a1
commit dfedd81d46
1 changed files with 19 additions and 12 deletions
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21
vendor/tng.js vendored
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@ -33,21 +33,28 @@ function PNG(file, options) {
this.options.optimization = this.options.optimization || 'mem';
if (Buffer.isBuffer(file)) {
buf = file;
this.file = null;
this.ext = 'png';
buf = file;
} else {
this.file = path.resolve(process.cwd(), file);
this.format = path.extname(this.file).slice(1).toLowerCase();
this.ext = path.extname(this.file).slice(1).toLowerCase();
buf = fs.readFileSync(this.file);
}
this.format = buf.readUInt32BE(0) === 0x89504e47 ? 'png'
: buf.slice(0, 3).toString('ascii') === 'GIF' ? 'gif'
: buf.readUInt16BE(0) === 0xffd8 ? 'jpg'
: this.ext;
if (this.format !== 'png') {
try {
return this.toPNG();
return this.toPNG(buf);
} catch (e) {
console.error('could not convert ' + this.format + ' to png');
throw e;
}
}
buf = fs.readFileSync(this.file);
}
chunks = this.parseRaw(buf);
idat = this.parseChunks(chunks);
@ -1026,7 +1033,7 @@ PNG.prototype.stop = function() {
this._control(-1);
};
PNG.prototype.toPNG = function() {
PNG.prototype.toPNG = function(input) {
var options = this.options
, file = this.file
, format = this.format
@ -1045,7 +1052,7 @@ PNG.prototype.toPNG = function() {
return img;
}
gif = GIF(file, options);
gif = GIF(input || file, options);
this.width = gif.width;
this.height = gif.height;