jpeg-js - npm Package Compare versions

Comparing version 0.2.0 to 0.3.0

lib/decoder.js

@@ -203,2 +203,3 @@ /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
         var z = dctZigZag[k];
+        var direction = zz[z] < 0 ? -1 : 1;
         switch (successiveACState) {
@@ -226,3 +227,3 @@ case 0: // initial state
           if (zz[z])
-            zz[z] += (readBit() << successive);
+            zz[z] += (readBit() << successive) * direction;
           else {
@@ -236,3 +237,3 @@ r--;
           if (zz[z])
-            zz[z] += (readBit() << successive);
+            zz[z] += (readBit() << successive) * direction;
           else {
@@ -245,3 +246,3 @@ zz[z] = successiveACNextValue << successive;
           if (zz[z])
-            zz[z] += (readBit() << successive);
+            zz[z] += (readBit() << successive) * direction;
           break;
@@ -722,3 +723,3 @@ }
 
-              ((huffmanTableSpec >> 4) === 0 ? 
+              ((huffmanTableSpec >> 4) === 0 ?
                 huffmanTablesDC : huffmanTablesAC)[huffmanTableSpec & 15] =
@@ -725,0 +726,0 @@ buildHuffmanTable(codeLengths, huffmanValues);

package.json

 {
   "name": "jpeg-js",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "description": "A pure javascript JPEG encoder and decoder",
@@ -5,0 +5,0 @@ "main": "index.js",

README.md

@@ -25,3 +25,3 @@ # jpeg-js
 var rawImageData = jpeg.decode(jpegData);
-console.log(jpegData.data);
+console.log(rawImageData);
 /*
@@ -41,3 +41,3 @@ { width: 320,
 var rawImageData = jpeg.decode(jpegData, true); // return as Uint8Array
-console.log(jpegData.data);
+console.log(rawImageData);
 /*
@@ -44,0 +44,0 @@ { width: 320,

test/index.js

@@ -107,2 +107,25 @@ var redtape = require('redtape'),
 
+it('should be able to decode a progressive JPEG', function(t) {
+  var jpegData = fixture('skater-progressive.jpg');
+  var rawImageData = jpeg.decode(jpegData);
+  t.equal(rawImageData.width, 256);
+  t.equal(rawImageData.height, 256);
+  var expected = fixture('skater-progressive.rgba');
+  t.deepEqual(rawImageData.data, expected);
+  t.end();
+});
+
+it('should be able to decode a progressive JPEG the same as non-progressive', function(t) {
+  var jpegData = fixture('skater.jpg');
+  var rawImageData = jpeg.decode(jpegData);
+
+  var otherJpegData = fixture('skater-progressive.jpg');
+  var otherRawImageData = jpeg.decode(otherJpegData);
+
+  t.equal(rawImageData.width, otherRawImageData.width);
+  t.equal(rawImageData.height, otherRawImageData.height);
+  t.deepEqual(rawImageData.data, otherRawImageData.data);
+  t.end();
+});
+
 it('should be able to encode a JPEG', function (t) {
@@ -109,0 +132,0 @@ var frameData = fixture('grumpycat.rgba');

New alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Fixed alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

4847273

increased by6.56%

Number of package files

32

increased by10.34%

Lines of code

1769

increased by1.14%

No dependency changes