__repo__ = "https://github.com/adafruit/Adafruit_Blinka_displayio.git"
from ._colorspace import Colorspace
-from ._structs import ColorspaceStruct
+from ._structs import ColorspaceStruct, InputPixelStruct, OutputPixelStruct
+from ._helpers import clamp, bswap16
class ColorConverter:
self._cached_output_color = None
@staticmethod
- def _clamp(value, min_value, max_value):
- return max(min(max_value, value), min_value)
-
- @staticmethod
- def _bswap16(value):
- # ABCD -> 00DC
- return (value & 0xFF00) >> 8 | (value & 0x00FF) << 8
-
- def _dither_noise_1(self, noise):
+ def _dither_noise_1(noise):
noise = (noise >> 13) ^ noise
more_noise = (
noise * (noise * noise * 60493 + 19990303) + 1376312589
) & 0x7FFFFFFF
- return self._clamp(int((more_noise / (1073741824.0 * 2)) * 255), 0, 0xFFFFFFFF)
+ return clamp(int((more_noise / (1073741824.0 * 2)) * 255), 0, 0xFFFFFFFF)
- def _dither_noise_2(self, x, y):
- return self._dither_noise_1(x + y * 0xFFFF)
+ @staticmethod
+ def _dither_noise_2(x, y):
+ return ColorConverter._dither_noise_1(x + y * 0xFFFF)
@staticmethod
def _compute_rgb565(color_rgb888: int):
return hue
- def _compute_sevencolor(self, color_rgb888: int):
+ @staticmethod
+ def _compute_sevencolor(color_rgb888: int):
# pylint: disable=too-many-return-statements
- chroma = self._compute_chroma(color_rgb888)
+ chroma = ColorConverter._compute_chroma(color_rgb888)
if chroma >= 64:
- hue = self._compute_hue(color_rgb888)
+ hue = ColorConverter._compute_hue(color_rgb888)
# Red 0
if hue < 10:
return 0x4
return 0x3
# The rest is red to 255
return 0x4
- luma = self._compute_luma(color_rgb888)
+ luma = ColorConverter._compute_luma(color_rgb888)
if luma >= 128:
return 0x1 # White
return 0x0 # Black
else:
raise ValueError("Color must be an integer or 3 or 4 value tuple")
- input_pixel = {
- "pixel": color,
- "x": 0,
- "y": 0,
- "tile": 0,
- "tile_x": 0,
- "tile_y": 0,
- }
+ input_pixel = InputPixelStruct(color)
+ output_pixel = OutputPixelStruct()
- output_pixel = {"pixel": 0, "opaque": False}
+ self._convert(self._output_colorspace, input_pixel, output_pixel)
- if input_pixel["pixel"] == self._transparent_color:
- return output_pixel["pixel"]
+ return output_pixel.pixel
+
+ def _convert(
+ self,
+ colorspace: Colorspace,
+ input_pixel: InputPixelStruct,
+ output_color: OutputPixelStruct,
+ ) -> None:
+ pixel = input_pixel.pixel
+
+ if self._transparent_color == pixel:
+ output_color.opaque = False
+ return
if (
not self._dither
and self._cached_colorspace == self._output_colorspace
- and self._cached_input_pixel == input_pixel["pixel"]
+ and self._cached_input_pixel == input_pixel.pixel
):
- return self._cached_output_color
+ output_color = self._cached_output_color
+ return
rgb888_pixel = input_pixel
- rgb888_pixel["pixel"] = self._convert_pixel(
- self._input_colorspace, input_pixel["pixel"]
- )
- self._convert_color(
- self._output_colorspace, self._dither, rgb888_pixel, output_pixel
+ rgb888_pixel.pixel = self._convert_pixel(
+ self._input_colorspace, input_pixel.pixel
)
+ self._convert_color(colorspace, self._dither, rgb888_pixel, output_color)
if not self._dither:
- self._cached_colorspace = self._output_colorspace
- self._cached_input_pixel = input_pixel["pixel"]
- self._cached_output_color = output_pixel["pixel"]
-
- return output_pixel["pixel"]
+ self._cached_colorspace = colorspace
+ self._cached_input_pixel = input_pixel.pixel
+ self._cached_output_color = output_color.pixel
- def _convert_pixel(self, colorspace: Colorspace, pixel: int) -> int:
- pixel = self._clamp(pixel, 0, 0xFFFFFFFF)
+ @staticmethod
+ def _convert_pixel(colorspace: Colorspace, pixel: int) -> int:
+ pixel = clamp(pixel, 0, 0xFFFFFFFF)
if colorspace in (
Colorspace.RGB565_SWAPPED,
Colorspace.RGB555_SWAPPED,
Colorspace.BGR565_SWAPPED,
Colorspace.BGR555_SWAPPED,
):
- pixel = self._bswap16(pixel)
+ pixel = bswap16(pixel)
if colorspace in (Colorspace.RGB565, Colorspace.RGB565_SWAPPED):
red8 = (pixel >> 11) << 3
grn8 = ((pixel >> 5) << 2) & 0xFF
return (pixel & 0xFF) & 0x01010101
return pixel
+ @staticmethod
def _convert_color(
- self,
colorspace: ColorspaceStruct,
dither: bool,
- input_pixel: dict,
- output_color: dict,
+ input_pixel: InputPixelStruct,
+ output_color: OutputPixelStruct,
) -> None:
# pylint: disable=too-many-return-statements, too-many-branches, too-many-statements
- pixel = input_pixel["pixel"]
+ pixel = input_pixel.pixel
if dither:
- rand_red = self._dither_noise_2(input_pixel["x"], input_pixel["y"])
- rand_grn = self._dither_noise_2(input_pixel["x"] + 33, input_pixel["y"])
- rand_blu = self._dither_noise_2(input_pixel["x"], input_pixel["y"] + 33)
+ rand_red = ColorConverter._dither_noise_2(input_pixel.x, input_pixel.y)
+ rand_grn = ColorConverter._dither_noise_2(input_pixel.x + 33, input_pixel.y)
+ rand_blu = ColorConverter._dither_noise_2(input_pixel.x, input_pixel.y + 33)
red8 = pixel >> 16
grn8 = (pixel >> 8) & 0xFF
pixel = (red8 << 16) | (grn8 << 8) | blu8
if colorspace.depth == 16:
- packed = self._compute_rgb565(pixel)
+ packed = ColorConverter._compute_rgb565(pixel)
if colorspace.reverse_bytes_in_word:
- packed = self._bswap16(packed)
- output_color["pixel"] = packed
- output_color["opaque"] = True
+ packed = bswap16(packed)
+ output_color.pixel = packed
+ output_color.opaque = True
return
if colorspace.tricolor:
- output_color["pixel"] = self._compute_luma(pixel) >> (8 - colorspace.depth)
- if self._compute_chroma(pixel) <= 16:
+ output_color.pixel = ColorConverter._compute_luma(pixel) >> (
+ 8 - colorspace.depth
+ )
+ if ColorConverter._compute_chroma(pixel) <= 16:
if not colorspace.grayscale:
- output_color["pixel"] = 0
- output_color["opaque"] = True
+ output_color.pixel = 0
+ output_color.opaque = True
return
- pixel_hue = self._compute_hue(pixel)
- output_color["pixel"] = self._compute_tricolor(
- colorspace, pixel_hue, output_color["pixel"]
+ pixel_hue = ColorConverter._compute_hue(pixel)
+ output_color.pixel = ColorConverter._compute_tricolor(
+ colorspace, pixel_hue, output_color.pixel
)
return
if colorspace.grayscale and colorspace.depth <= 8:
bitmask = (1 << colorspace.depth) - 1
- output_color["pixel"] = (
- self._compute_luma(pixel) >> colorspace.grayscale_bit
+ output_color.pixel = (
+ ColorConverter._compute_luma(pixel) >> colorspace.grayscale_bit
) & bitmask
- output_color["opaque"] = True
+ output_color.opaque = True
return
if colorspace.depth == 32:
- output_color["pixel"] = pixel
- output_color["opaque"] = True
+ output_color.pixel = pixel
+ output_color.opaque = True
return
if colorspace.depth == 8 and colorspace.grayscale:
- packed = self._compute_rgb332(pixel)
- output_color["pixel"] = packed
- output_color["opaque"] = True
+ packed = ColorConverter._compute_rgb332(pixel)
+ output_color.pixel = packed
+ output_color.opaque = True
return
if colorspace.depth == 4:
if colorspace.sevencolor:
- packed = self._compute_sevencolor(pixel)
+ packed = ColorConverter._compute_sevencolor(pixel)
else:
- packed = self._compute_rgbd(pixel)
- output_color["pixel"] = packed
- output_color["opaque"] = True
+ packed = ColorConverter._compute_rgbd(pixel)
+ output_color.pixel = packed
+ output_color.opaque = True
return
- output_color["opaque"] = False
+ output_color.opaque = False
def make_transparent(self, color: int) -> None:
"""Set the transparent color or index for the ColorConverter. This will
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