Added grayscale image support in put_image_data and exposed image_smo…

…othing_enabled attribute (#353) * Added grayscale image support in put_image_data and exposed image_smoothing_enabled attribute * Linter --------- Co-authored-by: AnyaPorter <[email protected]>
jupyter-widgets-contrib · Sep 5, 2024 · 5ade708 · 5ade708
1 parent 47f10f2
commit 5ade708
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Showing 3 changed files with 9 additions and 2 deletions.
diff --git a/ipycanvas/canvas.py b/ipycanvas/canvas.py
@@ -575,6 +575,9 @@ class Canvas(_CanvasBase):
     #: This property has no effect on Safari, see https://bugs.webkit.org/show_bug.cgi?id=198416
     filter = Unicode("none")
 
+    #: (bool) Indicates if scaled images are smoothed. Default to True
+    image_smoothing_enabled = Bool(True)
+
     _line_dash = List()
 
     #: (float) Specifies where to start a dash array on a line. Default is ``0.``.
@@ -614,6 +617,7 @@ class Canvas(_CanvasBase):
         "shadow_blur": 15,
         "shadow_color": 16,
         "filter": 17,
+        "image_smoothing_enabled": 18,
     }
 
     def __init__(self, *args, **kwargs):

diff --git a/ipycanvas/utils.py b/ipycanvas/utils.py
@@ -27,7 +27,9 @@ def image_bytes_to_array(im_bytes):
 
 def binary_image(ar, quality=75):
     f = BytesIO()
-    if ar.shape[2] == 3:
+    if len(ar.shape) == 2:
+        filetype = "PNG"
+    elif ar.shape[2] == 3:
         filetype = "JPEG"
     else:
         filetype = "PNG"

diff --git a/src/widget.ts b/src/widget.ts
@@ -609,7 +609,8 @@ export class CanvasModel extends DOMWidgetModel {
     'shadowOffsetY',
     'shadowBlur',
     'shadowColor',
-    'filter'
+    'filter',
+    'imageSmoothingEnabled'
   ];
 
   initialize(attributes: any, options: any) {