--- /dev/null
+# SPDX-FileCopyrightText: 2020 Melissa LeBlanc-Williams for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+"""
+`vectorio._vectorshape`
+================================================================================
+
+vectorio for Blinka
+
+**Software and Dependencies:**
+
+* Adafruit Blinka:
+ https://github.com/adafruit/Adafruit_Blinka/releases
+
+* Author(s): Melissa LeBlanc-Williams
+
+"""
+
+import struct
+from typing import Union, Tuple
+from circuitpython_typing import WriteableBuffer
+from displayio._colorconverter import ColorConverter
+from displayio._colorspace import Colorspace
+from displayio._palette import Palette
+from displayio._area import Area
+from displayio._structs import null_transform, InputPixelStruct, OutputPixelStruct
+
+__version__ = "0.0.0+auto.0"
+__repo__ = "https://github.com/adafruit/Adafruit_Blinka_displayio.git"
+
+
+class _VectorShape:
+ def __init__(
+ self,
+ pixel_shader: Union[ColorConverter, Palette],
+ x: int,
+ y: int,
+ ):
+ self._x = x
+ self._y = y
+ self._pixel_shader = pixel_shader
+ self._hidden = False
+ self._current_area_dirty = True
+ self._current_area = Area(0, 0, 0, 0)
+ self._ephemeral_dirty_area = Area(0, 0, 0, 0)
+ self._absolute_transform = null_transform
+ self._get_screen_area(self._current_area)
+
+ @property
+ def x(self) -> int:
+ """X position of the center point of the circle in the parent."""
+ return self._x
+
+ @x.setter
+ def x(self, value: int) -> None:
+ if self._x == value:
+ return
+ self._x = value
+ self._shape_set_dirty()
+
+ @property
+ def y(self) -> int:
+ """Y position of the center point of the circle in the parent."""
+ return self._y
+
+ @y.setter
+ def y(self, value: int) -> None:
+ if self._y == value:
+ return
+ self._y = value
+ self._shape_set_dirty()
+
+ @property
+ def hidden(self) -> bool:
+ """Hide the circle or not."""
+ return self._hidden
+
+ @hidden.setter
+ def hidden(self, value: bool) -> None:
+ self._hidden = value
+ self._shape_set_dirty()
+
+ @property
+ def location(self) -> Tuple[int, int]:
+ """(X,Y) position of the center point of the circle in the parent."""
+ return (self._x, self._y)
+
+ @location.setter
+ def location(self, value: Tuple[int, int]) -> None:
+ if len(value) != 2:
+ raise ValueError("location must be a list or tuple with exactly 2 integers")
+ x = value[0]
+ y = value[1]
+ dirty = False
+ if self._x != x:
+ self._x = x
+ dirty = True
+ if self._y != y:
+ self._y = y
+ dirty = True
+ if dirty:
+ self._shape_set_dirty()
+
+ @property
+ def pixel_shader(self) -> Union[ColorConverter, Palette]:
+ """The pixel shader of the circle."""
+ return self._pixel_shader
+
+ @pixel_shader.setter
+ def pixel_shader(self, value: Union[ColorConverter, Palette]) -> None:
+ self._pixel_shader = value
+
+ def _get_area(self, _out_area: Area) -> Area:
+ raise NotImplementedError("Subclass must implement _get_area")
+
+ def _get_pixel(self, _x: int, _y: int) -> int:
+ raise NotImplementedError("Subclass must implement _get_pixel")
+
+ def _shape_set_dirty(self) -> None:
+ current_area = Area()
+ self._get_screen_area(current_area)
+ moved = current_area != self._current_area
+ if moved:
+ self._current_area.union(
+ self._ephemeral_dirty_area, self._ephemeral_dirty_area
+ )
+ # Dirty area tracks the shape's footprint between draws. It's reset on refresh finish.
+ current_area.copy_into(self._current_area)
+ self._current_area_dirty = True
+
+ def _get_dirty_area(self, out_area: Area) -> Area:
+ out_area.x1 = out_area.x2
+ self._ephemeral_dirty_area.union(self._current_area, out_area)
+ return True # For now just always redraw.
+
+ def _get_screen_area(self, out_area) -> Area:
+ self._get_area(out_area)
+ if self._absolute_transform.transpose_xy:
+ x = self._absolute_transform.x + self._absolute_transform.dx * self._y
+ y = self._absolute_transform.y + self._absolute_transform.dy * self._x
+ if self._absolute_transform.dx < 1:
+ out_area.y1 = out_area.y1 * -1 + 1
+ out_area.y2 = out_area.y2 * -1 + 1
+ if self._absolute_transform.dy < 1:
+ out_area.x1 = out_area.x1 * -1 + 1
+ out_area.x2 = out_area.x2 * -1 + 1
+ self._area_transpose(out_area)
+ else:
+ x = self._absolute_transform.x + self._absolute_transform.dx * self._x
+ y = self._absolute_transform.y + self._absolute_transform.dy * self._y
+ if self._absolute_transform.dx < 1:
+ out_area.x1 = out_area.x1 * -1 + 1
+ out_area.x2 = out_area.x2 * -1 + 1
+ if self._absolute_transform.dy < 1:
+ out_area.y1 = out_area.y1 * -1 + 1
+ out_area.y2 = out_area.y2 * -1 + 1
+ out_area.canon()
+ out_area.shift(x, y)
+
+ @staticmethod
+ def _area_transpose(to_transpose: Area) -> Area:
+ to_transpose.x1, to_transpose.y1 = to_transpose.y1, to_transpose.x1
+ to_transpose.x2, to_transpose.y2 = to_transpose.y2, to_transpose.x2
+
+ def _screen_to_shape_coordinates(self, x: int, y: int) -> Tuple[int, int]:
+ """Get the target pixel based on the shape's coordinate space"""
+ if self._absolute_transform.transpose_xy:
+ out_shape_x = (
+ y - self._absolute_transform.y - self._absolute_transform.dy * self._x
+ )
+ out_shape_y = (
+ x - self._absolute_transform.x - self._absolute_transform.dx * self._y
+ )
+
+ if self._absolute_transform.dx < 1:
+ out_shape_x *= -1
+ if self._absolute_transform.dy < 1:
+ out_shape_y *= -1
+ else:
+ out_shape_x = (
+ x - self._absolute_transform.x - self._absolute_transform.dx * self._x
+ )
+ out_shape_y = (
+ y - self._absolute_transform.y - self._absolute_transform.dy * self._y
+ )
+
+ if self._absolute_transform.dx < 1:
+ out_shape_x *= -1
+ if self._absolute_transform.dy < 1:
+ out_shape_y *= -1
+
+ # It's mirrored via dx. Maybe we need to add support for also separately mirroring?
+ # if self.absolute_transform.mirror_x:
+ # pixel_to_get_x = (
+ # (shape_area.x2 - shape_area.x1)
+ # - (pixel_to_get_x - shape_area.x1)
+ # + shape_area.x1
+ # - 1
+ # )
+ # if self.absolute_transform.mirror_y:
+ # pixel_to_get_y = (
+ # (shape_area.y2 - shape_area.y1)
+ # - (pixel_to_get_y - shape_area.y1)
+ # + +shape_area.y1
+ # - 1
+ # )
+
+ return out_shape_x, out_shape_y
+
+ def _shape_contains(self, x: int, y: int) -> bool:
+ shape_x, shape_y = self._screen_to_shape_coordinates(x, y)
+ return self._get_pixel(shape_x, shape_y) != 0
+
+ def _fill_area(
+ self,
+ colorspace: Colorspace,
+ area: Area,
+ mask: WriteableBuffer,
+ buffer: WriteableBuffer,
+ ) -> bool:
+ # pylint: disable=too-many-locals,too-many-branches,too-many-statements
+ if self._hidden:
+ return False
+
+ overlap = Area()
+ if not area.compute_overlap(self._current_area, overlap):
+ return False
+
+ full_coverage = area == overlap
+ pixels_per_byte = 8 // colorspace.depth
+ linestride_px = area.width()
+ line_dirty_offset_px = (overlap.y1 - area.y1) * linestride_px
+ column_dirty_offset_px = overlap.x1 - area.x1
+
+ input_pixel = InputPixelStruct()
+ output_pixel = OutputPixelStruct()
+
+ shape_area = Area()
+ self._get_area(shape_area)
+
+ mask_start_px = line_dirty_offset_px
+
+ for input_pixel.y in range(overlap.y1, overlap.y2):
+ mask_start_px += column_dirty_offset_px
+ for input_pixel.x in range(overlap.x1, overlap.x2):
+ # Check the mask first to see if the pixel has already been set.
+ pixel_index = mask_start_px + (input_pixel.x - overlap.x1)
+ mask_doubleword = mask[pixel_index // 32]
+ mask_bit = pixel_index % 32
+ if (mask_doubleword & (1 << mask_bit)) != 0:
+ continue
+ output_pixel.pixel = 0
+
+ # Cast input screen coordinates to shape coordinates to pick the pixel to draw
+ pixel_to_get_x, pixel_to_get_y = self._screen_to_shape_coordinates(
+ input_pixel.x, input_pixel.y
+ )
+ input_pixel.pixel = self._get_pixel(pixel_to_get_x, pixel_to_get_y)
+
+ # vectorio shapes use 0 to mean "area is not covered."
+ # We can skip all the rest of the work for this pixel
+ # if it's not currently covered by the shape.
+ if input_pixel.pixel == 0:
+ full_coverage = False
+ else:
+ # Pixel is not transparent. Let's pull the pixel value index down
+ # to 0-base for more error-resistant palettes.
+ input_pixel.pixel -= 1
+ output_pixel.opaque = True
+ if self._pixel_shader is None:
+ output_pixel.pixel = input_pixel.pixel
+ elif isinstance(self._pixel_shader, Palette):
+ self._pixel_shader._get_color( # pylint: disable=protected-access
+ colorspace, input_pixel, output_pixel
+ )
+ elif isinstance(self._pixel_shader, ColorConverter):
+ self._pixel_shader._convert( # pylint: disable=protected-access
+ colorspace, input_pixel, output_pixel
+ )
+
+ if not output_pixel.opaque:
+ full_coverage = False
+
+ mask[pixel_index // 32] |= 1 << (pixel_index % 32)
+ if colorspace.depth == 16:
+ struct.pack_into(
+ "H",
+ buffer.cast("B"),
+ pixel_index * 2,
+ output_pixel.pixel,
+ )
+ elif colorspace.depth == 32:
+ struct.pack_into(
+ "I",
+ buffer.cast("B"),
+ pixel_index * 4,
+ output_pixel.pixel,
+ )
+ elif colorspace.depth == 8:
+ buffer.cast("B")[pixel_index] = output_pixel.pixel & 0xFF
+ elif colorspace.depth < 8:
+ # Reorder the offsets to pack multiple rows into
+ # a byte (meaning they share a column).
+ if not colorspace.pixels_in_byte_share_row:
+ row = pixel_index // linestride_px
+ col = pixel_index % linestride_px
+ # Dividing by pixels_per_byte does truncated division
+ # even if we multiply it back out
+ pixel_index = (
+ col * pixels_per_byte
+ + (row // pixels_per_byte)
+ * pixels_per_byte
+ * linestride_px
+ + (row % pixels_per_byte)
+ )
+ shift = (pixel_index % pixels_per_byte) * colorspace.depth
+ if colorspace.reverse_pixels_in_byte:
+ # Reverse the shift by subtracting it from the leftmost shift
+ shift = (pixels_per_byte - 1) * colorspace.depth - shift
+ buffer.cast("B")[pixel_index // pixels_per_byte] |= (
+ output_pixel.pixel << shift
+ )
+ mask_start_px += linestride_px - column_dirty_offset_px
+
+ return full_coverage
+
+ def _finish_refresh(self) -> None:
+ if self._ephemeral_dirty_area.empty() and not self._current_area_dirty:
+ return
+ # Reset dirty area to nothing
+ self._ephemeral_dirty_area.x1 = self._ephemeral_dirty_area.x2
+ self._current_area_dirty = False
+
+ if isinstance(self._pixel_shader, (Palette, ColorConverter)):
+ self._pixel_shader._finish_refresh() # pylint: disable=protected-access
+
+ def _get_refresh_areas(self, areas: list[Area]) -> None:
+ if self._current_area_dirty or (
+ isinstance(self._pixel_shader, (Palette, ColorConverter))
+ and self._pixel_shader._needs_refresh # pylint: disable=protected-access
+ ):
+ if not self._ephemeral_dirty_area.empty():
+ # Both are dirty, check if we should combine the areas or draw separately
+ # Draws as few pixels as possible both when animations move short distances
+ # and large distances. The display core implementation currently doesn't
+ # combine areas to reduce redrawing of masked areas. If it does, this could
+ # be simplified to just return the 2 possibly overlapping areas.
+ area_swap = Area()
+ self._ephemeral_dirty_area.compute_overlap(
+ self._current_area, area_swap
+ )
+ overlap_size = area_swap.size()
+ self._ephemeral_dirty_area.union(self._current_area, area_swap)
+ union_size = area_swap.size()
+ current_size = self._current_area.size()
+ dirty_size = self._ephemeral_dirty_area.size()
+
+ if union_size - dirty_size - current_size + overlap_size <= min(
+ dirty_size, current_size
+ ):
+ # The excluded / non-overlapping area from the disjoint dirty and current
+ # areas is smaller than the smallest area we need to draw. Redrawing the
+ # overlapping area would cost more than just drawing the union disjoint
+ # area once.
+ area_swap.copy_into(self._ephemeral_dirty_area)
+ else:
+ # The excluded area between the 2 dirty areas is larger than the smallest
+ # dirty area. It would be more costly to combine these areas than possibly
+ # redraw some overlap.
+ areas.append(self._current_area)
+ areas.append(self._ephemeral_dirty_area)
+ else:
+ areas.append(self._current_area)
+ elif not self._ephemeral_dirty_area.empty():
+ areas.append(self._ephemeral_dirty_area)
+
+ def _update_transform(self, group_transform) -> None:
+ self._absolute_transform = (
+ null_transform if group_transform is None else group_transform
+ )
+ self._shape_set_dirty()
projects / hackapet / Adafruit_Blinka_Displayio.git / blobdiff