import time
import struct
-import threading
from typing import Optional
from dataclasses import astuple
import digitalio
DISPLAY_DATA,
BACKLIGHT_IN_OUT,
BACKLIGHT_PWM,
+ NO_COMMAND,
)
__version__ = "0.0.0+auto.0"
__repo__ = "https://github.com/adafruit/Adafruit_Blinka_displayio.git"
-displays = []
-
class Display:
# pylint: disable=too-many-instance-attributes
The initialization sequence should always leave the display memory access inline with
the scan of the display to minimize tearing artifacts.
"""
+ # Turn off auto-refresh as we init
+ self._auto_refresh = False
ram_width = 0x100
ram_height = 0x100
if single_byte_bounds:
ram_width = 0xFF
ram_height = 0xFF
+
self._core = _DisplayCore(
bus=display_bus,
width=width,
bytes_per_cell=bytes_per_cell,
reverse_pixels_in_byte=reverse_pixels_in_byte,
reverse_bytes_in_word=reverse_bytes_in_word,
+ column_command=set_column_command,
+ row_command=set_row_command,
+ set_current_column_command=NO_COMMAND,
+ set_current_row_command=NO_COMMAND,
+ data_as_commands=data_as_commands,
+ always_toggle_chip_select=False,
+ sh1107_addressing=(SH1107_addressing and color_depth == 1),
+ address_little_endian=False,
)
- self._set_column_command = set_column_command
- self._set_row_command = set_row_command
self._write_ram_command = write_ram_command
self._brightness_command = brightness_command
- self._data_as_commands = data_as_commands
- self._single_byte_bounds = single_byte_bounds
- self._width = width
- self._height = height
- self._colstart = colstart
- self._rowstart = rowstart
- self._rotation = rotation
+ self._first_manual_refresh = not auto_refresh
+ self._backlight_on_high = backlight_on_high
+
+ self._native_frames_per_second = native_frames_per_second
+ self._native_ms_per_frame = 1000 // native_frames_per_second
+
self._auto_brightness = auto_brightness
- self._brightness = 1.0
+ self._brightness = brightness
self._auto_refresh = auto_refresh
+
self._initialize(init_sequence)
self._buffer = Image.new("RGB", (width, height))
self._subrectangles = []
self._bounds_encoding = ">BB" if single_byte_bounds else ">HH"
self._current_group = None
- displays.append(self)
+ self._last_refresh_call = 0
self._refresh_thread = None
if self._auto_refresh:
self.auto_refresh = True
self._backlight.switch_to_output()
self.brightness = brightness
+ def __new__(cls, *args, **kwargs):
+ from . import ( # pylint: disable=import-outside-toplevel, cyclic-import
+ allocate_display,
+ )
+
+ allocate_display(cls)
+ return super().__new__(cls)
+
def _initialize(self, init_sequence):
i = 0
while i < len(init_sequence):
delay = (data_size & 0x80) > 0
data_size &= ~0x80
- if self._data_as_commands:
+ if self._core.data_as_commands:
self._core.send(
DISPLAY_COMMAND,
CHIP_SELECT_TOGGLE_EVERY_BYTE,
def _send(self, command, data):
self._core.begin_transaction()
- if self._data_as_commands:
+ if self._core.data_as_commands:
self._core.send(
DISPLAY_COMMAND, CHIP_SELECT_TOGGLE_EVERY_BYTE, bytes([command]) + data
)
self._core.end_transaction()
def _send_pixels(self, data):
- if not self._data_as_commands:
+ if not self._core.data_as_commands:
self._core.send(
DISPLAY_COMMAND,
CHIP_SELECT_TOGGLE_EVERY_BYTE,
target_frames_per_second: Optional[int] = None,
minimum_frames_per_second: int = 0,
) -> bool:
- # pylint: disable=unused-argument, protected-access
"""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
When auto refresh is on, updates the display immediately. (The display will also
update without calls to this.)
"""
+ maximum_ms_per_real_frame = 0xFFFFFFFF
+ if minimum_frames_per_second > 0:
+ maximum_ms_per_real_frame = 1000 // minimum_frames_per_second
+
+ if target_frames_per_second is None:
+ target_ms_per_frame = 0xFFFFFFFF
+ else:
+ target_ms_per_frame = 1000 // target_frames_per_second
+
+ if (
+ not self._auto_refresh
+ and not self._first_manual_refresh
+ and target_ms_per_frame != 0xFFFFFFFF
+ ):
+ current_time = time.monotonic() * 1000
+ current_ms_since_real_refresh = current_time - self._core.last_refresh
+ if current_ms_since_real_refresh > maximum_ms_per_real_frame:
+ raise RuntimeError("Below minimum frame rate")
+ current_ms_since_last_call = current_time - self._last_refresh_call
+ self._last_refresh_call = current_time
+ if current_ms_since_last_call > target_ms_per_frame:
+ return False
+
+ remaining_time = target_ms_per_frame - (
+ current_ms_since_real_refresh % target_ms_per_frame
+ )
+ time.sleep(remaining_time / 1000)
+ self._first_manual_refresh = False
+ self._refresh_display()
+ return True
+
+ def _refresh_display(self):
+ # pylint: disable=protected-access
if not self._core.start_refresh():
return False
# Go through groups and and add each to buffer
- if self._core._current_group is not None:
- buffer = Image.new("RGBA", (self._core._width, self._core._height))
+ if self._core.current_group is not None:
+ buffer = Image.new("RGBA", (self._core.width, self._core.height))
# Recursively have everything draw to the image
- self._core._current_group._fill_area(
+ self._core.current_group._fill_area(
buffer
) # pylint: disable=protected-access
# save image to buffer (or probably refresh buffer so we can compare)
return True
- def _refresh_loop(self):
- while self._auto_refresh:
+ def _background(self):
+ if (
+ self._auto_refresh
+ and (time.monotonic() * 1000 - self._core.last_refresh)
+ > self._native_ms_per_frame
+ ):
self.refresh()
def _refresh_display_area(self, rectangle):
"""Loop through dirty rectangles and redraw that area."""
img = self._buffer.convert("RGB").crop(astuple(rectangle))
- img = img.rotate(360 - self._rotation, expand=True)
+ img = img.rotate(360 - self._core.rotation, expand=True)
display_rectangle = self._apply_rotation(rectangle)
img = img.crop(astuple(self._clip(display_rectangle)))
)
self._send(
- self._set_column_command,
+ self._core.column_command,
self._encode_pos(
- display_rectangle.x1 + self._colstart,
- display_rectangle.x2 + self._colstart - 1,
+ display_rectangle.x1 + self._core.colstart,
+ display_rectangle.x2 + self._core.colstart - 1,
),
)
self._send(
- self._set_row_command,
+ self._core.row_command,
self._encode_pos(
- display_rectangle.y1 + self._rowstart,
- display_rectangle.y2 + self._rowstart - 1,
+ display_rectangle.y1 + self._core.rowstart,
+ display_rectangle.y2 + self._core.rowstart - 1,
),
)
self._core.end_transaction()
def _clip(self, rectangle):
- if self._rotation in (90, 270):
- width, height = self._height, self._width
+ if self._core.rotation in (90, 270):
+ width, height = self._core.height, self._core.width
else:
- width, height = self._width, self._height
+ width, height = self._core.width, self._core.height
rectangle.x1 = max(rectangle.x1, 0)
rectangle.y1 = max(rectangle.y1, 0)
def _apply_rotation(self, rectangle):
"""Adjust the rectangle coordinates based on rotation"""
- if self._rotation == 90:
+ if self._core.rotation == 90:
return RectangleStruct(
- self._height - rectangle.y2,
+ self._core.height - rectangle.y2,
rectangle.x1,
- self._height - rectangle.y1,
+ self._core.height - rectangle.y1,
rectangle.x2,
)
- if self._rotation == 180:
+ if self._core.rotation == 180:
return RectangleStruct(
- self._width - rectangle.x2,
- self._height - rectangle.y2,
- self._width - rectangle.x1,
- self._height - rectangle.y1,
+ self._core.width - rectangle.x2,
+ self._core.height - rectangle.y2,
+ self._core.width - rectangle.x1,
+ self._core.height - rectangle.y1,
)
- if self._rotation == 270:
+ if self._core.rotation == 270:
return RectangleStruct(
rectangle.y1,
- self._width - rectangle.x2,
+ self._core.width - rectangle.x2,
rectangle.y2,
- self._width - rectangle.x1,
+ self._core.width - rectangle.x1,
)
return rectangle
self, y: int, buffer: circuitpython_typing.WriteableBuffer
) -> circuitpython_typing.WriteableBuffer:
"""Extract the pixels from a single row"""
- for x in range(0, self._width):
+ for x in range(0, self._core.width):
_rgb_565 = self._colorconverter.convert(self._buffer.getpixel((x, y)))
buffer[x * 2] = (_rgb_565 >> 8) & 0xFF
buffer[x * 2 + 1] = _rgb_565 & 0xFF
@auto_refresh.setter
def auto_refresh(self, value: bool):
self._auto_refresh = value
- if self._refresh_thread is None:
- self._refresh_thread = threading.Thread(
- target=self._refresh_loop, daemon=True
- )
- if value and not self._refresh_thread.is_alive():
- # Start the thread
- self._refresh_thread.start()
- elif not value and self._refresh_thread.is_alive():
- # Stop the thread
- self._refresh_thread.join()
- self._refresh_thread = None
@property
def brightness(self) -> float:
projects / hackapet / Adafruit_Blinka_Displayio.git / blobdiff