framebufferio – Native framebuffer display driving¶
The framebufferio module contains classes to manage display output
including synchronizing with refresh rates and partial updating.
It is used in conjunction with classes from displayio to actually
place items on the display; and classes like RGBMatrix to actually
drive the display.
Available on these boards
- class framebufferio.FramebufferDisplay(framebuffer: _typing.FrameBuffer, *, rotation: int = 0, auto_refresh: bool = True)¶
Manage updating a display with framebuffer in RAM
This initializes a display and connects it into CircuitPython. Unlike other objects in CircuitPython, Display objects live until
displayio.release_displays()is called. This is done so that CircuitPython can use the display itself.Create a Display object with the given framebuffer (a buffer, array, ulab.array, etc)
- Paramètres:
framebuffer (FrameBuffer) – The framebuffer that the display is connected to
auto_refresh (bool) – Automatically refresh the screen
rotation (int) – The rotation of the display in degrees clockwise. Must be in 90 degree increments (0, 90, 180, 270)
- auto_refresh :bool¶
True when the display is refreshed automatically.
- brightness :float¶
The brightness of the display as a float. 0.0 is off and 1.0 is full brightness. When
auto_brightnessis True, the value ofbrightnesswill change automatically. Ifbrightnessis set,auto_brightnesswill be disabled and will be set to False.
- auto_brightness :bool¶
True when the display brightness is adjusted automatically, based on an ambient light sensor or other method. Note that some displays may have this set to True by default, but not actually implement automatic brightness adjustment.
auto_brightnessis set to False ifbrightnessis set manually.
- width :int¶
Gets the width of the framebuffer
- height :int¶
Gets the height of the framebuffer
- rotation :int¶
The rotation of the display as an int in degrees.
- framebuffer :_typing.FrameBuffer¶
The framebuffer being used by the display
- show(group: displayio.Group) None¶
Switches to displaying the given group of layers. When group is None, the default CircuitPython terminal will be shown.
- Paramètres:
group (Group) – The group to show.
- refresh(*, target_frames_per_second: int = 60, minimum_frames_per_second: int = 1) bool¶
When auto refresh is off, waits for the target frame rate and then refreshes the display, returning True. If the call has taken too long since the last refresh call for the given target frame rate, then the refresh returns False immediately without updating the screen to hopefully help getting caught up.
If the time since the last successful refresh is below the minimum frame rate, then an exception will be raised. Set minimum_frames_per_second to 0 to disable.
When auto refresh is on, updates the display immediately. (The display will also update without calls to this.)
- fill_row(y: int, buffer: _typing.WriteableBuffer) _typing.WriteableBuffer¶
Extract the pixels from a single row
- Paramètres:
y (int) – The top edge of the area
buffer (WriteableBuffer) – The buffer in which to place the pixel data