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-rw-r--r--synapse/config/repository.py39
-rw-r--r--synapse/rest/media/v1/base_resource.py18
2 files changed, 41 insertions, 16 deletions
diff --git a/synapse/config/repository.py b/synapse/config/repository.py
index 748dd14e23..7cab874422 100644
--- a/synapse/config/repository.py
+++ b/synapse/config/repository.py
@@ -14,6 +14,27 @@
 # limitations under the License.
 
 from ._base import Config
+from collections import namedtuple
+
+ThumbnailRequirement = namedtuple(
+    "ThumbnailRequirement", ["width", "height", "method", "media_type"]
+)
+
+def parse_thumbnail_requirements(thumbnail_sizes):
+    requirements = {}
+    for size in thumbnail_sizes:
+        width = size["width"]
+        height = size["height"]
+        method = size["method"]
+        jpeg_thumbnail = ThumbnailRequirement(width, height, method, "image/jpeg")
+        png_thumbnail = ThumbnailRequirement(width, height, method, "image/png")
+        requirements.setdefault("image/jpeg", []).append(jpeg_thumbnail)
+        requirements.setdefault("image/gif", []).append(png_thumbnail)
+        requirements.setdefault("image/png", []).append(png_thumbnail)
+    return {
+        media_type: tuple(thumbnails)
+        for media_type, thumbnails in requirements.items()
+    }
 
 
 class ContentRepositoryConfig(Config):
@@ -23,6 +44,9 @@ class ContentRepositoryConfig(Config):
         self.media_store_path = self.ensure_directory(config["media_store_path"])
         self.uploads_path = self.ensure_directory(config["uploads_path"])
         self.dynamic_thumbnails = config["dynamic_thumbnails"]
+        self.thumbnail_requirements = parse_thumbnail_requirements(
+            config["thumbnail_sizes"]
+        )
 
     def default_config(self, config_dir_path, server_name):
         media_store = self.default_path("media_store")
@@ -46,4 +70,19 @@ class ContentRepositoryConfig(Config):
         # generate a new thumbnail. If false the server will pick a thumbnail
         # from a precalcualted list.
         dynamic_thumbnails: false
+
+        # List of thumbnail to precalculate when an image is uploaded.
+        thumbnail_sizes:
+        - width: 32
+          height: 32
+          method: crop
+        - width: 96
+          height: 96
+          method: crop
+        - width: 320
+          height: 240
+          method: scale
+        - width: 640
+          height: 480
+          method: scale
         """ % locals()
diff --git a/synapse/rest/media/v1/base_resource.py b/synapse/rest/media/v1/base_resource.py
index e39729489e..271cbca2d6 100644
--- a/synapse/rest/media/v1/base_resource.py
+++ b/synapse/rest/media/v1/base_resource.py
@@ -70,6 +70,7 @@ class BaseMediaResource(Resource):
         self.version_string = hs.version_string
         self.downloads = {}
         self.dynamic_thumbnails = hs.config.dynamic_thumbnails
+        self.thumbnail_requirements = hs.config.thumbnail_requirements
 
     def _respond_404(self, request):
         respond_with_json(
@@ -209,22 +210,7 @@ class BaseMediaResource(Resource):
             self._respond_404(request)
 
     def _get_thumbnail_requirements(self, media_type):
-        if media_type == "image/jpeg":
-            return (
-                (32, 32, "crop", "image/jpeg"),
-                (96, 96, "crop", "image/jpeg"),
-                (320, 240, "scale", "image/jpeg"),
-                (640, 480, "scale", "image/jpeg"),
-            )
-        elif (media_type == "image/png") or (media_type == "image/gif"):
-            return (
-                (32, 32, "crop", "image/png"),
-                (96, 96, "crop", "image/png"),
-                (320, 240, "scale", "image/png"),
-                (640, 480, "scale", "image/png"),
-            )
-        else:
-            return ()
+        return self.thumbnail_requirements.get(media_type, ())
 
     def _generate_thumbnail(self, input_path, t_path, t_width, t_height,
                             t_method, t_type):