exifreader - npm Package Compare versions

Comparing version 3.0.0 to 3.1.0

dist/exif-reader.js

@@ -1,2 +0,2 @@
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c={},f=0,d=Object.keys(t.iccProfile),s=d.length;f<s;f++){var l=d[f],p=t.iccProfile[l],g=p.value(e,parseInt(l,10)),m=g;p.description&&(m=p.description(g)),c[p.name]={value:g,description:m}}if("acsp"!==o(i.slice(36,40)))throw new Error("ICC profile: missing signature");if(function(e){return e.length<132}(i))return c;for(var v=e.getUint32(128),h=132,y=0;y<v;y++){if(r(i,h))return c;var S=(0,n.getStringFromDataView)(e,h,4),b=e.getUint32(h+4),A=e.getUint32(h+8);if(b>i.length)return c;var C=(0,n.getStringFromDataView)(e,b,4);if("desc"===C){var P=e.getUint32(b+8);if(P>A)return c;a(c,S,o(i.slice(b+12,b+P+11)))}else if("mluc"===C){for(var w=e.getUint32(b+8),I=e.getUint32(b+12),D=b+16,U=[],M=0;M<w;M++){var _=(0,n.getStringFromDataView)(e,D+0,2),F=(0,n.getStringFromDataView)(e,D+2,2),O=e.getUint32(D+4),E=e.getUint32(D+8),x=(0,n.getUnicodeStringFromDataView)(e,b+E,O);U.push({languageCode:_,countryCode:F,text:x}),D+=I}if(1===w)a(c,S,U[0].text);else{for(var 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Date(Date.UTC(n,r,i,o,a,u))}(e,t).toISOString()}},36:{name:"ICC Signature",value:function(e,t){return n=e.buffer.slice(t,t+4),String.fromCharCode.apply(null,new Uint8Array(n));var n}},40:{name:"Primary Platform",value:function(e,n){return(0,t.getStringFromDataView)(e,n,4)},description:function(e){return n(e)}},48:{name:"Device Manufacturer",value:function(e,n){return(0,t.getStringFromDataView)(e,n,4)},description:function(e){return n(e)}},52:{name:"Device Model Number",value:function(e,n){return(0,t.getStringFromDataView)(e,n,4)}},64:{name:"Rendering Intent",value:function(e,t){return e.getUint32(t)},description:function(e){switch(e){case 0:return"Perceptual";case 1:return"Relative Colorimetric";case 2:return"Saturation";case 3:return"Absolute Colorimetric";default:return e}}},80:{name:"Profile Creator",value:function(e,n){return(0,t.getStringFromDataView)(e,n,4)}}}})?r.apply(t,i):r)||(e.exports=o)},function(e,t,n){var r,i,o;i=[t,n(3)],void 0===(o="function"==typeof(r=function(e,t){"use strict";Object.defineProperty(e,"__esModule",{value:!0});var n,r=(n=t)&&n.__esModule?n:{default:n};function i(e,t){if(!(t+0+4>e.byteLength)){var n=r.default.getLongAt(e,t);return{value:n,description:n+"px"}}}function o(e,t){if(!(t+4+4>e.byteLength)){var n=r.default.getLongAt(e,t+4);return{value:n,description:n+"px"}}}function a(e,t){if(!(t+8+1>e.byteLength)){var n=r.default.getByteAt(e,t+8);return{value:n,description:""+n}}}function u(e,t){if(!(t+9+1>e.byteLength)){var n=r.default.getByteAt(e,t+9);return{value:n,description:{0:"Grayscale",2:"RGB",3:"Palette",4:"Grayscale with Alpha",6:"RGB with Alpha"}[n]||"Unknown"}}}function c(e,t){if(!(t+10+1>e.byteLength)){var n=r.default.getByteAt(e,t+10);return{value:n,description:0===n?"Deflate/Inflate":"Unknown"}}}function f(e,t){if(!(t+11+1>e.byteLength)){var n=r.default.getByteAt(e,t+11);return{value:n,description:0===n?"Adaptive":"Unknown"}}}function d(e,t){if(!(t+12+1>e.byteLength)){var n=r.default.getByteAt(e,t+12);return{value:n,description:{0:"Noninterlaced",1:"Adam7 Interlace"}[n]||"Unknown"}}}e.default={read:function(e,t){return{"Image Width":i(e,t),"Image Height":o(e,t),"Bit Depth":a(e,t),"Color Type":u(e,t),Compression:c(e,t),Filter:f(e,t),Interlace:d(e,t)}}}})?r.apply(t,i):r)||(e.exports=o)},function(e,t,n){var r,i,o;i=[t],void 0===(o="function"==typeof(r=function(e){"use strict";function t(e){this.name="MetadataMissingError",this.message=e||"No Exif data",this.stack=(new Error).stack}Object.defineProperty(e,"__esModule",{value:!0}),t.prototype=new Error,e.default={MetadataMissingError:t}})?r.apply(t,i):r)||(e.exports=o)}])}));
 //# sourceMappingURL=exif-reader.js.map

package.json

 {
   "name": "exifreader",
-  "version": "3.0.0",
+  "version": "3.1.0",
   "description": "Library that parses Exif metadata in images.",
@@ -5,0 +5,0 @@ "author": "Mattias Wallander <[e-mail]>",

README.md

@@ -6,4 +6,4 @@ ExifReader
 metadata. It can be used either in a browser or from Node. Supports JPEG, TIFF,
-and HEIC files with tags encoded using Exif, IPTC, and XMP (the latter two only
-for JPEG).
+PNG, and HEIC files with tags encoded using Exif, IPTC, and XMP (depending on
+file type).
 
@@ -120,5 +120,2 @@ ExifReader supports module formats AMD, CommonJS and globals and can therefore
 
--   The `description` property of tags can change in a minor update. If you
-    want to process a tag's value somehow, use the `value` property to be sure
-    nothing breaks between updates.
 -   In Exif data, the full GPS information is split into two different tags for
@@ -133,2 +130,6 @@ each direction: the coordinate value (`GPSLatitude`, `GPSLongitude`) and the
     (negative).
+-   For PNG files, only XMP tags are currently supported. If you are missing
+    tags in a PNG file, please open a new issue and supply an example image.
+    (Tags in PNGs can be compressed though which will probably be hard to
+    support in browsers without the size of the library getting too big.)
 -   Some XMP tags have processed values as descriptions. That means that e.g. an
@@ -142,2 +143,5 @@ `Orientation` value of `3` will have `Rotate 180` in the `description`
     compiled with support for the specific encoding](https://nodejs.org/api/util.html#util_whatwg_supported_encodings).
+-   The `description` property of tags can change in a minor update. If you
+    want to process a tag's value somehow, use the `value` property to be sure
+    nothing breaks between updates.
 
@@ -224,2 +228,3 @@ Client/Browser Support
 -   **March 2020**:
+    -   Add support for PNG images.
     -   Major update to version 3.0. However, the actual change is quite small,
@@ -226,0 +231,0 @@ albeit a breaking one if you use that functionality (`.value` on

src/exif-reader.js

@@ -18,2 +18,3 @@ /**
 import IccTags from './icc-tags';
+import PngFileTags from './png-file-tags';
 import exifErrors from './errors';
@@ -45,3 +46,3 @@
 
-    const {fileDataOffset, tiffHeaderOffset, iptcDataOffset, xmpChunks, iccChunks} = ImageHeader.parseAppMarkers(dataView);
+    const {fileDataOffset, tiffHeaderOffset, iptcDataOffset, xmpChunks, iccChunks, pngHeaderOffset} = ImageHeader.parseAppMarkers(dataView);
 
@@ -93,2 +94,11 @@ if (hasFileData(fileDataOffset)) {
     }
+    if (hasPngFileData(pngHeaderOffset)) {
+        foundMetaData = true;
+        const readTags = PngFileTags.read(dataView, pngHeaderOffset);
+        if (options.expanded) {
+            tags.pngFile = readTags;
+        } else {
+            tags = objectAssign({}, tags, readTags);
+        }
+    }
     if (!foundMetaData) {
@@ -120,1 +130,5 @@ throw new exifErrors.MetadataMissingError();
 }
+
+function hasPngFileData(pngFileDataOffset) {
+    return pngFileDataOffset !== undefined;
+}

src/image-header.js

@@ -13,2 +13,14 @@ /* This Source Code Form is subject to the terms of the Mozilla Public
 const TIFF_FILE_HEADER_OFFSET = 0;
+
+const PNG_ID = '\x89\x50\x4e\x47\x0d\x0a\x1a\x0a';
+const PNG_CHUNK_LENGTH_SIZE = 4;
+const PNG_CHUNK_TYPE_SIZE = 4;
+const PNG_CRC_SIZE = 4;
+const PNG_CHUNK_LENGTH_OFFSET = 0;
+const PNG_CHUNK_TYPE_OFFSET = PNG_CHUNK_LENGTH_SIZE;
+const PNG_CHUNK_DATA_OFFSET = PNG_CHUNK_LENGTH_SIZE + PNG_CHUNK_TYPE_SIZE;
+const PNG_CHUNK_TYPE_IMAGE_HEADER = 'IHDR';
+const PNG_CHUNK_TYPE_INTERNATIONAL_TEXT = 'iTXt';
+const PNG_XMP_PREFIX = 'XML:com.adobe.xmp';
+
 const HEIC_ID = 'ftyp';
@@ -18,2 +30,3 @@ const HEIC_ID_OFFSET = 4;
 const HEIC_MAJOR_BRAND_LENGTH = 4;
+
 const JPEG_ID = 0xffd8;
@@ -65,2 +78,6 @@ const JPEG_ID_SIZE = 2;
 
+    if (isPngFile(dataView)) {
+        return findPngOffsets(dataView);
+    }
+
     if (isHeicFile(dataView)) {
@@ -232,2 +249,42 @@ return findHeicOffsets(dataView);
 
+function isPngFile(dataView) {
+    return getStringFromDataView(dataView, 0, PNG_ID.length) === PNG_ID;
+}
+
+function findPngOffsets(dataView) {
+    const offsets = {
+        hasAppMarkers: false
+    };
+    let offset = PNG_ID.length;
+
+    while (offset + PNG_CHUNK_LENGTH_SIZE + PNG_CHUNK_TYPE_SIZE <= dataView.byteLength) {
+        if (isPngImageHeaderChunk(dataView, offset)) {
+            offsets.hasAppMarkers = true;
+            offsets.pngHeaderOffset = offset + PNG_CHUNK_DATA_OFFSET;
+        } else if (isPngXmpChunk(dataView, offset)) {
+            offsets.hasAppMarkers = true;
+            offsets.xmpChunks = [{
+                dataOffset: offset + PNG_CHUNK_DATA_OFFSET + PNG_XMP_PREFIX.length,
+                length: dataView.getUint32(offset + PNG_CHUNK_LENGTH_OFFSET) - PNG_XMP_PREFIX.length
+            }];
+        }
+
+        offset += dataView.getUint32(offset + PNG_CHUNK_LENGTH_OFFSET)
+            + PNG_CHUNK_LENGTH_SIZE
+            + PNG_CHUNK_TYPE_SIZE
+            + PNG_CRC_SIZE;
+    }
+
+    return offsets;
+}
+
+function isPngImageHeaderChunk(dataView, offset) {
+    return getStringFromDataView(dataView, offset + PNG_CHUNK_TYPE_OFFSET, PNG_CHUNK_TYPE_SIZE) === PNG_CHUNK_TYPE_IMAGE_HEADER;
+}
+
+function isPngXmpChunk(dataView, offset) {
+    return (getStringFromDataView(dataView, offset + PNG_CHUNK_TYPE_OFFSET, PNG_CHUNK_TYPE_SIZE) === PNG_CHUNK_TYPE_INTERNATIONAL_TEXT)
+        && (getStringFromDataView(dataView, offset + PNG_CHUNK_DATA_OFFSET, PNG_XMP_PREFIX.length) === PNG_XMP_PREFIX);
+}
+
 function isHeicFile(dataView) {
@@ -234,0 +291,0 @@ const heicMajorBrand = getStringFromDataView(dataView, HEIC_ID_OFFSET + HEIC_ID.length, HEIC_MAJOR_BRAND_LENGTH);

No alert changes

Improved metrics

Total package byte prevSize

442141

increased by4.62%

Number of package files

33

increased by3.13%

Lines of code

4892

increased by3.82%

Number of lines in readme file

275

increased by1.85%

No dependency changes