Add support for AutoDesk DWG format (#572)

sindresorhus · Jan 11, 2023 · 47aa221 · 47aa221
1 parent ec3ba33
commit 47aa221
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Showing 7 changed files with 22 additions and 3 deletions.
diff --git a/core.d.ts b/core.d.ts
@@ -142,7 +142,8 @@ export type FileExtension =
 	| 'jxl'
 	| 'vcf'
 	| 'jls'
-	| 'pst';
+	| 'pst'
+	| 'dwg';
 
 export type MimeType =
 	| 'image/jpeg'
@@ -280,7 +281,8 @@ export type MimeType =
 	| 'image/jxl'
 	| 'application/zstd'
 	| 'image/jls'
-	| 'application/vnd.ms-outlook';
+	| 'application/vnd.ms-outlook'
+	| 'image/vnd.dwg';
 
 export type FileTypeResult = {
 	/**

diff --git a/core.js b/core.js
@@ -938,6 +938,16 @@ class FileTypeParser {
 			};
 		}
 
+		if (this.checkString('AC')) {
+			const version = this.buffer.toString('binary', 2, 6);
+			if (version.match('^d*') && version >= 1000 && version <= 1050) {
+				return {
+					ext: 'dwg',
+					mime: 'image/vnd.dwg',
+				};
+			}
+		}
+
 		// -- 7-byte signatures --
 
 		if (this.checkString('BLENDER')) {

diff --git a/fixture/fixture-line-weights.dwg b/fixture/fixture-line-weights.dwg
diff --git a/package.json b/package.json
@@ -195,7 +195,8 @@
 		"jxl",
 		"vcf",
 		"jls",
-		"pst"
+		"pst",
+		"dwg"
 	],
 	"dependencies": {
 		"readable-web-to-node-stream": "^3.0.2",

diff --git a/readme.md b/readme.md
@@ -376,6 +376,7 @@ Returns a `Set<string>` of supported MIME types.
 - [`dng`](https://en.wikipedia.org/wiki/Digital_Negative) - Adobe Digital Negative image file
 - [`docx`](https://en.wikipedia.org/wiki/Office_Open_XML) - Microsoft Word
 - [`dsf`](https://dsd-guide.com/sites/default/files/white-papers/DSFFileFormatSpec_E.pdf) - Sony DSD Stream File (DSF)
+- [`dwg`](https://en.wikipedia.org/wiki/.dwg) - Autodesk CAD file
 - [`elf`](https://en.wikipedia.org/wiki/Executable_and_Linkable_Format) - Unix Executable and Linkable Format
 - [`eot`](https://en.wikipedia.org/wiki/Embedded_OpenType) - Embedded OpenType font
 - [`eps`](https://en.wikipedia.org/wiki/Encapsulated_PostScript) - Encapsulated PostScript

diff --git a/supported.js b/supported.js
@@ -140,6 +140,7 @@ export const extensions = [
 	'vcf',
 	'jls',
 	'pst',
+	'dwg',
 ];
 
 export const mimeTypes = [
@@ -279,4 +280,5 @@ export const mimeTypes = [
 	'application/zstd',
 	'image/jls',
 	'application/vnd.ms-outlook',
+	'image/vnd.dwg',
 ];
diff --git a/test.js b/test.js
@@ -238,6 +238,9 @@ const names = {
 	pst: [
 		'fixture-sample',
 	],
+	dwg: [
+		'fixture-line-weights',
+	],
 };
 
 // Define an entry here only if the file type has potential
-Original file line number
+Diff line change
@@ Expand Up / @@ -195,7 +195,8 @@ @@
     		"jxl",
     		"vcf",
     		"jls",
-    		"pst"
+    		"pst",
+    		"dwg"
     	],
     	"dependencies": {
     		"readable-web-to-node-stream": "^3.0.2",
@@ Expand Down @@