add exportImage method

CHANGES.md

@@ -1,6 +1,13 @@
 videojs-wavesurfer changelog
 ============================
 
+1.2.4 (unreleased)
+------------------
+
+- add `exportImage` to save an image of the waveform
+- bump required wavesurfer.js version to 1.2.0 for `exportImage` method
+
+
 1.2.3 (2016/08/27)
 ------------------
 

README.md

@@ -116,6 +116,7 @@ player.waveform.destroy();
 | `setVolume(level)` | Set the volume level. |
 | `play` | Start playback. |
 | `pause` | Pause playback. |
+| `exportImage(format, quality)` | Save waveform image as data URI. Default format is 'image/png'. |
 
 Other wavesurfer.js methods
 ---------------------------

videojs.wavesurfer.js

@@ -377,6 +377,23 @@
             }
         },
 
+        /**
+         * Save waveform image as data URI.
+         *
+         * The default format is 'image/png'. Other supported types are
+         * 'image/jpeg' and 'image/webp'.
+         *
+         * @param {String} format String indicating the image format. The
+         *                        default type is image/png.
+         * @param {Number} quality Number between 0 and 1 indicating image
+         *                 quality if the requested type is image/jpeg or
+         *                 image/webp. The default is 1.
+         */
+        exportImage: function(format, quality)
+        {
+            return this.surfer.exportImage(format, quality);
+        },
+
         /**
          * Updates the player's element displaying the current time.
          *