tiff - npm Package Compare versions

Comparing version 4.2.0 to 4.3.0

History.md

@@ -0,1 +1,8 @@
+## [4.3.0](https://github.com/image-js/tiff/compare/v4.2.0...v4.3.0) (2020-12-03)
+
+
+### Features
+
+* add support for Zlib/deflate compression ([7d3a04c](https://github.com/image-js/tiff/commit/7d3a04c04c44d75373ccd6c7928cb69b3b725077))
+
 # [4.2.0](https://github.com/image-js/tiff/compare/v4.1.3...v4.2.0) (2020-08-21)
@@ -2,0 +9,0 @@

lib-esm/tiffDecoder.js

@@ -7,2 +7,3 @@ import { IOBuffer } from 'iobuffer';
 import TiffIfd from './tiffIfd';
+import { decompressZlib } from './zlib';
 const defaultOptions = {
@@ -191,2 +192,7 @@ ignoreImageData: false,
                 }
+                case 8: {
+                    // Zlib compression
+                    dataToFill = decompressZlib(stripData);
+                    break;
+                }
                 case 2: // CCITT Group 3 1-Dimensional Modified Huffman run length encoding
@@ -197,3 +203,3 @@ throw unsupported('Compression', 'CCITT Group 3');
                 default:
-                    throw new Error(`invalid compression: ${ifd.compression}`);
+                    throw unsupported('Compression', ifd.compression);
             }
@@ -200,0 +206,0 @@ pixel = this.fillUncompressed(bitDepth, sampleFormat, data, dataToFill, pixel, length);

lib/tiffDecoder.js

@@ -12,2 +12,3 @@ "use strict";
 const tiffIfd_1 = __importDefault(require("./tiffIfd"));
+const zlib_1 = require("./zlib");
 const defaultOptions = {
@@ -196,2 +197,7 @@ ignoreImageData: false,
                 }
+                case 8: {
+                    // Zlib compression
+                    dataToFill = zlib_1.decompressZlib(stripData);
+                    break;
+                }
                 case 2: // CCITT Group 3 1-Dimensional Modified Huffman run length encoding
@@ -202,3 +208,3 @@ throw unsupported('Compression', 'CCITT Group 3');
                 default:
-                    throw new Error(`invalid compression: ${ifd.compression}`);
+                    throw unsupported('Compression', ifd.compression);
             }
@@ -205,0 +211,0 @@ pixel = this.fillUncompressed(bitDepth, sampleFormat, data, dataToFill, pixel, length);

package.json

 {
   "name": "tiff",
-  "version": "4.2.0",
+  "version": "4.3.0",
   "description": "TIFF image decoder written entirely in JavaScript",
@@ -40,14 +40,16 @@ "main": "lib/index.js",
   "dependencies": {
-    "iobuffer": "^5.0.2"
+    "iobuffer": "^5.0.2",
+    "pako": "^2.0.2"
   },
   "devDependencies": {
-    "@types/jest": "^26.0.10",
-    "@types/node": "^14.6.0",
-    "eslint": "^7.7.0",
-    "eslint-config-cheminfo-typescript": "^7.0.0",
-    "jest": "^26.4.1",
-    "prettier": "^2.0.5",
+    "@types/jest": "^26.0.16",
+    "@types/node": "^14.14.10",
+    "@types/pako": "^1.0.1",
+    "eslint": "^7.14.0",
+    "eslint-config-cheminfo-typescript": "^8.0.5",
+    "jest": "^26.6.3",
+    "prettier": "^2.2.1",
     "rimraf": "^3.0.2",
-    "ts-jest": "^26.2.0",
-    "typescript": "^4.0.2"
+    "ts-jest": "^26.4.4",
+    "typescript": "^4.1.2"
   },
@@ -54,0 +56,0 @@ "prettier": {

README.md

@@ -17,8 +17,2 @@ # tiff
 
-### Platform
-
-This package is written using ES2015 features. It is natively compatible with
-recent web browsers and Node.js. You can transpile it with a tool like
-[babel](https://babeljs.io/) if you need to support more JavaScript engines.
-
 ### [TIFF standard](./TIFF6.pdf)
@@ -29,2 +23,6 @@
 
+### Extensions
+
+Images compressed with Zlib/deflate algorithm are also supported.
+
 ## API
@@ -31,0 +29,0 @@

src/tiffDecoder.ts

@@ -12,2 +12,3 @@ import { IOBuffer } from 'iobuffer';
 import { BufferType, IDecodeOptions, IFDKind, DataArray } from './types';
+import { decompressZlib } from './zlib';
 
@@ -232,2 +233,7 @@ const defaultOptions: IDecodeOptions = {
         }
+        case 8: {
+          // Zlib compression
+          dataToFill = decompressZlib(stripData);
+          break;
+        }
         case 2: // CCITT Group 3 1-Dimensional Modified Huffman run length encoding
@@ -238,3 +244,3 @@ throw unsupported('Compression', 'CCITT Group 3');
         default:
-          throw new Error(`invalid compression: ${ifd.compression}`);
+          throw unsupported('Compression', ifd.compression);
       }
@@ -241,0 +247,0 @@

No alert changes

Improved metrics

Total package byte prevSize

184601

increased by1.51%

Number of package files

76

increased by8.57%

Lines of code

3463

increased by1.44%

Worsened metrics

Dependency count

2

increased by100%

Dev dependency count

10

increased by11.11%

Number of lines in readme file

75

decreased by-2.6%

Dependency changes

• + Addedpako@^2.0.2

• + Addedpako@2.1.0(transitive)