fix: support Deflate compression code (#56)

image-js · Sep 12, 2024 · d965602 · d965602
1 parent 8292398
commit d965602
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Showing 3 changed files with 10 additions and 2 deletions.
diff --git a/img/image-deflate.tif b/img/image-deflate.tif
diff --git a/src/__tests__/decode.test.ts b/src/__tests__/decode.test.ts
@@ -31,6 +31,13 @@ const files: TiffFile[] = [
     bitsPerSample: 8,
     components: 3,
   },
+  {
+    name: 'image-deflate.tif',
+    width: 5100,
+    height: 3434,
+    bitsPerSample: 8,
+    components: 3,
+  },
   {
     name: 'color8.tif',
     width: 160,

diff --git a/src/tiffDecoder.ts b/src/tiffDecoder.ts
@@ -249,8 +249,9 @@ export default class TIFFDecoder extends IOBuffer {
           dataToFill = decompressLzw(stripData);
           break;
         }
-        case 8: {
-          // Zlib compression
+        case 8:
+        case 32946: {
+          // Zlib and Deflate compressions. They are identical.
           dataToFill = decompressZlib(stripData);
           break;
         }