Added support for indexed color image rendering; fixes #483

pyproject.toml

@@ -32,7 +32,7 @@ dependencies = [
 # Required to display images in the TUI
 images = [
     "pillow>=9.5.0",
-    "term-image==0.7.0",
+    "term-image>=0.7.2",
 ]
 
 # Required to display rich text in the TUI

toot/tui/images.py

@@ -22,7 +22,7 @@ def image_support_enabled():
     def can_render_pixels(image_format):
         return image_format in _IMAGE_PIXEL_FORMATS
 
-    def get_base_image(image, image_format) -> BaseImage:
+    def get_base_image(image, image_format, colors) -> BaseImage:
         # we don't autodetect kitty, iterm; we choose based on option switches
 
         global _ImageCls
@@ -36,6 +36,8 @@ def get_base_image(image, image_format) -> BaseImage:
                 else BlockImage
             )
             _ImageCls.forced_support = True
+            if colors == 256 and not can_render_pixels(image_format):
+                _ImageCls.set_render_method("INDEXED")
 
         return _ImageCls(image)
 
@@ -79,7 +81,7 @@ def load_image(url):
             except Exception:
                 return None
 
-    def graphics_widget(img, image_format="block", corner_radius=0) -> urwid.Widget:
+    def graphics_widget(img, image_format="block", corner_radius=0, colors=16777216) -> urwid.Widget:
         if not img:
             return urwid.SolidFill(fill_char=" ")
 
@@ -88,7 +90,7 @@ def graphics_widget(img, image_format="block", corner_radius=0) -> urwid.Widget:
         else:
             render_img = img
 
-        return UrwidImage(get_base_image(render_img, image_format), '<', upscale=True)
+        return UrwidImage(get_base_image(render_img, image_format, colors), '<', upscale=True)
         # "<" means left-justify the image
 
 except ImportError:

toot/tui/overlays.py

@@ -262,15 +262,17 @@ def account_header(self, account):
         if image_support_enabled() and account['avatar'] and not account["avatar"].endswith("missing.png"):
             img = load_image(account['avatar'])
             aimg = urwid.BoxAdapter(
-                graphics_widget(img, image_format=self.options.image_format, corner_radius=10), 10)
+                graphics_widget(img, image_format=self.options.image_format, corner_radius=10,
+                                colors=self.options.colors), 10)
         else:
             aimg = urwid.BoxAdapter(urwid.SolidFill(" "), 10)
 
         if image_support_enabled() and account['header'] and not account["header"].endswith("missing.png"):
             img = load_image(account['header'])
 
             himg = (urwid.BoxAdapter(
-                graphics_widget(img, image_format=self.options.image_format, corner_radius=10), 10))
+                graphics_widget(img, image_format=self.options.image_format, corner_radius=10,
+                                colors=self.options.colors), 10))
         else:
             himg = urwid.BoxAdapter(urwid.SolidFill(" "), 10)
 

toot/tui/timeline.py

@@ -339,7 +339,8 @@ def update_status_image(self, status, path, placeholder_index):
         if img:
             try:
                 status.placeholders[placeholder_index]._set_original_widget(
-                    graphics_widget(img, image_format=self.tui.options.image_format, corner_radius=10))
+                    graphics_widget(img, image_format=self.tui.options.image_format, corner_radius=10,
+                                    colors=self.tui.options.colors))
 
             except IndexError:
                 # ignore IndexErrors.
@@ -408,7 +409,8 @@ def image_widget(self, path, rows=None, aspect=None) -> urwid.Widget:
                 pass
         if img:
             return (urwid.BoxAdapter(
-                graphics_widget(img, image_format=self.timeline.tui.options.image_format, corner_radius=10), rows))
+                graphics_widget(img, image_format=self.timeline.tui.options.image_format, corner_radius=10,
+                                colors=self.timeline.tui.options.colors), rows))
         else:
             placeholder = urwid.BoxAdapter(urwid.SolidFill(fill_char=" "), rows)
             self.status.placeholders.append(placeholder)