1 files changed, 150 insertions, 0 deletions
diff --git a/src/photos/HeifSupport.vala b/src/photos/HeifSupport.vala
new file mode 100644
index 0000000..0c05e02
--- /dev/null
+++ b/src/photos/HeifSupport.vala
@@ -0,0 +1,150 @@
+/* Copyright 2016 Software Freedom Conservancy Inc.
+ *
+ * This software is licensed under the GNU LGPL (version 2.1 or later).
+ * See the COPYING file in this distribution.
+ */
+
+class HeifFileFormatProperties : PhotoFileFormatProperties {
+    private static string[] KNOWN_EXTENSIONS = { "heif", "heic" };
+    private static string[] KNOWN_MIME_TYPES = { "image/heif" };
+
+    private static HeifFileFormatProperties instance = null;
+
+    public static void init() {
+        instance = new HeifFileFormatProperties();
+    }
+    
+    public static HeifFileFormatProperties get_instance() {
+        return instance;
+    }
+    
+    public override PhotoFileFormat get_file_format() {
+        return PhotoFileFormat.HEIF;
+    }
+    
+    public override PhotoFileFormatFlags get_flags() {
+        return PhotoFileFormatFlags.NONE;
+    }
+
+    public override string get_user_visible_name() {
+        return _("HEIF");
+    }
+
+    public override string get_default_extension() {
+        return KNOWN_EXTENSIONS[0];
+    }
+    
+    public override string[] get_known_extensions() {
+        return KNOWN_EXTENSIONS;
+    }
+    
+    public override string get_default_mime_type() {
+        return KNOWN_MIME_TYPES[0];
+    }
+    
+    public override string[] get_mime_types() {
+        return KNOWN_MIME_TYPES;
+    }
+}
+
+public class HeifSniffer : GdkSniffer {
+    private const string[] MAGIC_SEQUENCES = { "heic", "heix", "hevc", "heim", "heis", "hevm", "hevs", "mif1", "msf1"};
+
+    public HeifSniffer(File file, PhotoFileSniffer.Options options) {
+        base (file, options);
+    }
+
+    public override DetectedPhotoInformation? sniff(out bool is_corrupted) throws Error {
+        // Rely on GdkSniffer to detect corruption
+        is_corrupted = false;
+        
+        if (!is_supported_bmff_with_variants(file, MAGIC_SEQUENCES))
+            return null;
+        
+        DetectedPhotoInformation? detected = base.sniff(out is_corrupted);
+        if (detected == null)
+            return null;
+
+        if (detected.file_format == PhotoFileFormat.AVIF)
+            detected.file_format = PhotoFileFormat.HEIF;
+
+        // Heif contains its own rotation information, so we need to ignore the EXIF rotation+
+        if (detected.metadata != null) {
+            detected.metadata.set_orientation(Orientation.TOP_LEFT);
+        }
+
+        return (detected.file_format == PhotoFileFormat.HEIF) ? detected : null;
+    }
+
+}
+
+public class HeifReader : GdkReader {
+    public HeifReader(string filepath) {
+        base (filepath, PhotoFileFormat.HEIF);
+    }
+
+    public override PhotoMetadata read_metadata() throws Error {
+        PhotoMetadata metadata = new PhotoMetadata();
+        metadata.read_from_file(get_file());
+        // Heif contains its own rotation information, so we need to ignore the EXIF rotation
+        metadata.set_orientation(Orientation.TOP_LEFT);
+        return metadata;
+    }
+
+}
+
+public class HeifMetadataWriter : PhotoFileMetadataWriter {
+    public HeifMetadataWriter(string filepath) {
+        base (filepath, PhotoFileFormat.HEIF);
+    }
+    
+    public override void write_metadata(PhotoMetadata metadata) throws Error {
+        metadata.write_to_file(get_file());
+    }
+}
+
+public class HeifFileFormatDriver : PhotoFileFormatDriver {
+    private static HeifFileFormatDriver instance = null;
+    
+    public static void init() {
+        instance = new HeifFileFormatDriver();
+        HeifFileFormatProperties.init();
+    }
+    
+    public static HeifFileFormatDriver get_instance() {
+        return instance;
+    }
+    
+    public override PhotoFileFormatProperties get_properties() {
+        return HeifFileFormatProperties.get_instance();
+    }
+    
+    public override PhotoFileReader create_reader(string filepath) {
+        return new HeifReader(filepath);
+    }
+    
+    public override bool can_write_image() {
+        return false;
+    }
+    
+    public override bool can_write_metadata() {
+        return true;
+    }
+    
+    public override PhotoFileWriter? create_writer(string filepath) {
+        return null;
+    }
+    
+    public override PhotoFileMetadataWriter? create_metadata_writer(string filepath) {
+        return new HeifMetadataWriter(filepath);
+    }
+    
+    public override PhotoFileSniffer create_sniffer(File file, PhotoFileSniffer.Options options) {
+        return new HeifSniffer(file, options);
+    }
+    
+    public override PhotoMetadata create_metadata() {
+        return new PhotoMetadata();
+    }
+}
+