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ui(raylib): reduce spinner rotation artifact (#35048)

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* ui(raylib): reduce spinner rotation artifact

A visual artifact (white pixels) appeared on the edge of the
rotating spinner track texture, likely due to RGB color bleed during
bilinear filtering in Raylib.

Pre-multiplying the alpha channel of the spinner track image using
`rl.image_alpha_premultiply` significantly reduces the visibility of the
artifact.

* lint
This commit is contained in:
Cameron Clough
2025-04-22 15:28:54 +01:00
committed by GitHub
parent 8cefc00a6e
commit 23524e2038
2 changed files with 5 additions and 2 deletions
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system/ui/lib/application.py
+3 -1
View File
@@ -50,9 +50,11 @@ class GuiApplication:
self._set_styles()
self._load_fonts()
def load_texture_from_image(self, file_name: str, width: int, height: int):
def load_texture_from_image(self, file_name: str, width: int, height: int, alpha_premultiply = False):
"""Load and resize a texture, storing it for later automatic unloading."""
image = rl.load_image(file_name)
if alpha_premultiply:
rl.image_alpha_premultiply(image)
rl.image_resize(image, width, height)
texture = rl.load_texture_from_image(image)
# Set texture filtering to smooth the result
system/ui/spinner.py
+2 -1
View File
@@ -23,7 +23,8 @@ def clamp(value, min_value, max_value):
class Spinner:
def __init__(self):
self._comma_texture = gui_app.load_texture_from_image(os.path.join(BASEDIR, "selfdrive/assets/img_spinner_comma.png"), TEXTURE_SIZE, TEXTURE_SIZE)
self._spinner_texture = gui_app.load_texture_from_image(os.path.join(BASEDIR, "selfdrive/assets/img_spinner_track.png"), TEXTURE_SIZE, TEXTURE_SIZE)
self._spinner_texture = gui_app.load_texture_from_image(os.path.join(BASEDIR, "selfdrive/assets/img_spinner_track.png"), TEXTURE_SIZE, TEXTURE_SIZE,
alpha_premultiply=True)
self._rotation = 0.0
self._text: str = ""
self._progress: int | None = None