tiff - npm Package Compare versions

Comparing version 1.0.0 to 1.1.0

package.json

 {
   "name": "tiff",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "TIFF image decoder written entirely in JavaScript",
@@ -5,0 +5,0 @@ "main": "src/index.js",

src/IFD.js

@@ -78,3 +78,3 @@ 'use strict';
     get maxSampleValue() {
-        return this.fields.get(281) || (1 << this.bitsPerSample) - 1;
+        return this.fields.get(281) || Math.pow(2, this.bitsPerSample) - 1;
     }
@@ -81,0 +81,0 @@ get xResolution() {

src/TIFFDecoder.js

@@ -103,4 +103,5 @@ 'use strict';
         const bitDepth = ifd.bitsPerSample;
+        const sampleFormat = ifd.sampleFormat;
         let size = width * height;
-        const data = getDataArray(size, 1, bitDepth);
+        const data = getDataArray(size, 1, bitDepth, sampleFormat);
 
@@ -123,4 +124,6 @@ const compression = ifd.compression;
                 pixel = fill16bit(data, stripData, pixel, length, this.isLittleEndian());
+            } else if (bitDepth === 32 && sampleFormat === 3) {
+                pixel = fillFloat32(data, stripData, pixel, length, this.isLittleEndian());
             } else {
-                unsupported('bitDepth: ', bitDepth);
+                unsupported('bitDepth', bitDepth);
             }
@@ -149,3 +152,3 @@ }
 
-function getDataArray(size, channels, bitDepth) {
+function getDataArray(size, channels, bitDepth, sampleFormat) {
     if (bitDepth === 8) {
@@ -155,4 +158,6 @@ return new Uint8Array(size * channels);
         return new Uint16Array(size * channels);
+    } else if (bitDepth === 32 && sampleFormat === 3) {
+        return new Float32Array(size * channels);
     } else {
-        unsupported('bit depth', bitDepth);
+        unsupported('bit depth / sample format', bitDepth + ' / ' + sampleFormat);
     }
@@ -175,4 +180,11 @@ }
 
+function fillFloat32(dataTo, dataFrom, index, length, littleEndian) {
+    for (var i = 0; i < length * 4; i += 4) {
+        dataTo[index++] = dataFrom.getFloat32(i, littleEndian);
+    }
+    return index;
+}
+
 function unsupported(type, value) {
     throw new Error('Unsupported ' + type + ': ' + value);
 }

No alert changes

Improved metrics

Total package byte prevSize

15541

increased by3.93%

Lines of code

411

increased by2.75%

No dependency changes