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web preview fixes

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Chuck
2025-08-10 13:33:51 -05:00
parent 4f1736fb0f
commit 1f7285cfc4
2 changed files with 48 additions and 9 deletions
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29
web_interface_v2.py
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@@ -57,32 +57,45 @@ class DisplayMonitor:
def _monitor_loop(self):
global display_manager, current_display_data
snapshot_path = "/tmp/led_matrix_preview.png"
while self.running:
try:
if display_manager and hasattr(display_manager, 'image'):
# Convert raw image to base64 (no server-side scaling; client scales visually)
# Prefer service-provided snapshot if available (works when ledmatrix service is running)
if os.path.exists(snapshot_path):
with open(snapshot_path, 'rb') as f:
img_bytes = f.read()
img_str = base64.b64encode(img_bytes).decode()
# If we can infer dimensions from display_manager, include them; else leave 0
width = display_manager.width if display_manager else 0
height = display_manager.height if display_manager else 0
current_display_data = {
'image': img_str,
'width': width,
'height': height,
'timestamp': time.time()
}
socketio.emit('display_update', current_display_data)
elif display_manager and hasattr(display_manager, 'image'):
# Fallback to in-process manager image
img_buffer = io.BytesIO()
display_manager.image.save(img_buffer, format='PNG')
img_str = base64.b64encode(img_buffer.getvalue()).decode()
current_display_data = {
'image': img_str,
'width': display_manager.width,
'height': display_manager.height,
'timestamp': time.time()
}
# Emit to all connected clients
socketio.emit('display_update', current_display_data)
except Exception as e:
logger.error(f"Display monitor error: {e}", exc_info=True)
# Yield to the async loop; target ~10 FPS to reduce load
# Yield to the async loop; target ~5-10 FPS
try:
socketio.sleep(0.1)
socketio.sleep(0.2)
except Exception:
time.sleep(0.1)
time.sleep(0.2)
display_monitor = DisplayMonitor()