X-Git-Url: https://main.carlh.net/gitweb/?p=dcpomatic.git;a=blobdiff_plain;f=src%2Flib%2Fimage_proxy.h;h=b6fe877321ecc06d460faf283522997d4a22c8dc;hp=b0ec161102d1f311e1e019c47793314c35166944;hb=f515b8daea9d28200be803bb64ff17e9f30343c4;hpb=3828baf56467224f5d44049bf1e7a7ed11f43a05

diff --git a/src/lib/image_proxy.h b/src/lib/image_proxy.h
index b0ec16110..b6fe87732 100644
--- a/src/lib/image_proxy.h
+++ b/src/lib/image_proxy.h
@@ -60,13 +60,27 @@ class ImageProxy : public boost::noncopyable
 public:
 	virtual ~ImageProxy () {}
 
-	/** @return Image (which must be aligned) */
-	virtual boost::shared_ptr<Image> image (boost::optional<dcp::NoteHandler> note = boost::optional<dcp::NoteHandler> ()) const = 0;
+	/** @param log Log to write to, or 0.
+	 *  @param size Size that the returned image will be scaled to, in case this
+	 *  can be used as an optimisation.
+	 *  @return Image (which must be aligned) and log2 of any scaling down that has
+	 *  already been applied to the image; e.g. if the the image is already half the size
+	 *  of the original, the second part of the return value will be 1.
+	 */
+	virtual std::pair<boost::shared_ptr<Image>, int> image (
+		boost::optional<dcp::Size> size = boost::optional<dcp::Size> ()
+		) const = 0;
+
 	virtual void add_metadata (xmlpp::Node *) const = 0;
 	virtual void send_binary (boost::shared_ptr<Socket>) const = 0;
 	/** @return true if our image is definitely the same as another, false if it is probably not */
 	virtual bool same (boost::shared_ptr<const ImageProxy>) const = 0;
-	virtual AVPixelFormat pixel_format () const = 0;
+	/** Do any useful work that would speed up a subsequent call to ::image().
+	 *  This method may be called in a different thread to image().
+	 *  @return log2 of any scaling down that will be applied to the image.
+	 */
+	virtual int prepare (boost::optional<dcp::Size> = boost::optional<dcp::Size>()) const { return 0; }
+	virtual size_t memory_used () const = 0;
 };
 
 boost::shared_ptr<ImageProxy> image_proxy_factory (boost::shared_ptr<cxml::Node> xml, boost::shared_ptr<Socket> socket);