Merge pull request #81 from chrsmth/feat/ora

feat: add support for OpenRaster (ora) format

README.md

@@ -120,6 +120,7 @@ assert_eq!(kind.extension(), "foo");
 - **jxr** - `image/vnd.ms-photo`
 - **psd** - `image/vnd.adobe.photoshop`
 - **ico** - `image/vnd.microsoft.icon`
+- **ora** - `image/openraster`
 
 #### Video
 

src/map.rs

@@ -203,6 +203,12 @@ matcher_map!(
         "jxl",
         matchers::image::is_jxl
     ),
+    (
+        MatcherType::Image,
+        "image/openraster",
+        "ora",
+        matchers::image::is_ora
+    ),
     // Video
     (
         MatcherType::Video,

src/matchers/image.rs

@@ -162,6 +162,38 @@ fn is_isobmff(buf: &[u8]) -> bool {
     buf.len() >= ftyp_length
 }
 
+pub fn is_ora(buf: &[u8]) -> bool {
+    buf.len() > 57
+        && buf[0] == 0x50
+        && buf[1] == 0x4B
+        && buf[2] == 0x3
+        && buf[3] == 0x4
+        && buf[30] == 0x6D
+        && buf[31] == 0x69
+        && buf[32] == 0x6D
+        && buf[33] == 0x65
+        && buf[34] == 0x74
+        && buf[35] == 0x79
+        && buf[36] == 0x70
+        && buf[37] == 0x65
+        && buf[38] == 0x69
+        && buf[39] == 0x6D
+        && buf[40] == 0x61
+        && buf[41] == 0x67
+        && buf[42] == 0x65
+        && buf[43] == 0x2F
+        && buf[44] == 0x6F
+        && buf[45] == 0x70
+        && buf[46] == 0x65
+        && buf[47] == 0x6E
+        && buf[48] == 0x72
+        && buf[49] == 0x61
+        && buf[50] == 0x73
+        && buf[51] == 0x74
+        && buf[52] == 0x65
+        && buf[53] == 0x72
+}
+
 // GetFtyp returns the major brand, minor version and compatible brands of the ISO-BMFF data
 fn get_ftyp(buf: &[u8]) -> Option<(&[u8], &[u8], impl Iterator<Item = &[u8]>)> {
     if buf.len() < 16 {

tests/image.rs

@@ -27,3 +27,5 @@ test_format!(Image, "image/heif", "heif", heif, "sample.heic");
 test_format!(Image, "image/avif", "avif", avif, "sample.avif");
 
 test_format!(Image, "image/jxl", "jxl", jxl, "spline_on_first_frame.jxl");
+
+test_format!(Image, "image/openraster", "ora", ora, "sample.ora");