import math
-from typing import Optional, Tuple
-
-from displayio import Bitmap
+import struct
+from typing import Optional, Tuple, BinaryIO
+import numpy as np
+from displayio import Bitmap, Colorspace
import circuitpython_typing
def draw_polygon(dest_bitmap: Bitmap,
xs: circuitpython_typing.ReadableBuffer,
ys: circuitpython_typing.ReadableBuffer,
- value: int, close: bool | None = True):
+ value: int, close: bool = True):
if len(xs) != len(ys):
raise ValueError("Length of xs and ys must be equal.")
def rotozoom(
- dest_bitmap,
- source_bitmap,
+ dest_bitmap: Bitmap,
+ source_bitmap: Bitmap,
*,
- ox: int,
- oy: int,
- dest_clip0: Tuple[int, int],
- dest_clip1: Tuple[int, int],
- px: int,
- py: int,
- source_clip0: Tuple[int, int],
- source_clip1: Tuple[int, int],
- angle: float,
- scale: float,
- skip_index: int,
+ ox: Optional[int] = None,
+ oy: Optional[int] = None,
+ dest_clip0: Optional[Tuple[int, int]] = None,
+ dest_clip1: Optional[Tuple[int, int]] = None,
+ px: Optional[int] = None,
+ py: Optional[int] = None,
+ source_clip0: Optional[Tuple[int, int]] = None,
+ source_clip1: Optional[Tuple[int, int]] = None,
+ angle: Optional[float] = None,
+ scale: Optional[float] = None,
+ skip_index: Optional[int] = None,
):
+
+ if ox is None:
+ ox = dest_bitmap.width // 2
+ if oy in None:
+ oy = dest_bitmap.height // 2
+
+ if dest_clip0 is None:
+ dest_clip0 = (0,0)
+ if dest_clip1 is None:
+ dest_clip1 = (dest_bitmap.width,dest_bitmap.height)
+
+ if px is None:
+ px = source_bitmap.width // 2
+ if py in None:
+ py = source_bitmap.height // 2
+
+ if source_clip0 is None:
+ source_clip0 = (0,0)
+ if source_clip1 is None:
+ source_clip1 = (source_bitmap.width,source_bitmap.height)
+
+ if angle is None:
+ angle = 0.0
+ if scale is None:
+ scale = 1.0
+
dest_clip0_x, dest_clip0_y = dest_clip0
dest_clip1_x, dest_clip1_y = dest_clip1
source_clip0_x, source_clip0_y = source_clip0
bitmap: Bitmap,
data: circuitpython_typing.ReadableBuffer,
x1: int = 0, y1: int = 0,
- x2: int | None = None, y2: int | None = None,
- skip_index: int | None = None):
-
+ x2: Optional[int] = None, y2: Optional[int] = None,
+ skip_index: Optional[int] = None):
if x2 is None:
x2 = bitmap.width
if y2 is None:
value = int(data[i] % _value_count)
if skip_index is None or value != skip_index:
bitmap[x, y] = value
+
+
+def readinto(bitmap: Bitmap,
+ file: BinaryIO,
+ bits_per_pixel: int,
+ element_size: int = 1,
+ reverse_pixels_in_element: bool = False,
+ swap_bytes: bool = False,
+ reverse_rows: bool = False):
+ width = bitmap.width
+ height = bitmap.height
+ bits_per_value = bitmap._bits_per_value
+ mask = (1 << bits_per_value) - 1
+
+ elements_per_row = (width * bits_per_pixel + element_size * 8 - 1) // (element_size * 8)
+ rowsize = element_size * elements_per_row
+
+ for y in range(height):
+ row_bytes = file.read(rowsize)
+ if len(row_bytes) != rowsize:
+ raise EOFError()
+
+ # Convert the raw bytes into the appropriate type array for processing
+ rowdata = bytearray(row_bytes)
+
+ if swap_bytes:
+ if element_size == 2:
+ rowdata = bytearray(
+ b''.join(
+ struct.pack('<H', struct.unpack('>H', rowdata[i:i + 2])[0])
+ for i in range(0, len(rowdata), 2)
+ )
+ )
+ elif element_size == 4:
+ rowdata = bytearray(
+ b''.join(
+ struct.pack('<I', struct.unpack('>I', rowdata[i:i + 4])[0])
+ for i in range(0, len(rowdata), 4)
+ )
+ )
+
+ y_draw = height - 1 - y if reverse_rows else y
+
+ for x in range(width):
+ value = 0
+ if bits_per_pixel == 1:
+ byte_offset = x // 8
+ bit_offset = 7 - (x % 8) if reverse_pixels_in_element else x % 8
+ value = (rowdata[byte_offset] >> bit_offset) & 0x1
+ elif bits_per_pixel == 2:
+ byte_offset = x // 4
+ bit_index = 3 - (x % 4) if reverse_pixels_in_element else x % 4
+ bit_offset = 2 * bit_index
+ value = (rowdata[byte_offset] >> bit_offset) & 0x3
+ elif bits_per_pixel == 4:
+ byte_offset = x // 2
+ bit_index = 1 - (x % 2) if reverse_pixels_in_element else x % 2
+ bit_offset = 4 * bit_index
+ value = (rowdata[byte_offset] >> bit_offset) & 0xF
+ elif bits_per_pixel == 8:
+ value = rowdata[x]
+ elif bits_per_pixel == 16:
+ value = struct.unpack_from('<H', rowdata, x * 2)[0]
+ elif bits_per_pixel == 24:
+ offset = x * 3
+ value = (rowdata[offset] << 16) | (rowdata[offset + 1] << 8) | rowdata[offset + 2]
+ elif bits_per_pixel == 32:
+ value = struct.unpack_from('<I', rowdata, x * 4)[0]
+
+ bitmap[x, y_draw] = value & mask
+
+class BlendMode:
+ Normal = "bitmaptools.BlendMode.Normal"
+ Screen = "bitmaptools.BlendMode.Screen"
+
+def alphablend(dest: Bitmap, source1: Bitmap, source2: Bitmap, colorspace: Colorspace,
+ factor1: float = 0.5, factor2: Optional[float] = None,
+ blendmode: BlendMode = BlendMode.Normal, skip_source1_index: Optional[int] = None,
+ skip_source2_index: Optional[int] = None):
+ """
+ colorspace should be one of: 'L8', 'RGB565', 'RGB565_SWAPPED', 'BGR565_SWAPPED'.
+
+blendmode can be 'normal' (or any default) or 'screen'.
+
+This assumes that all bitmaps (dest, source1, source2) support 2D access like bitmap[x, y].
+
+dest.width and dest.height are used; make sure the bitmap objects have these attributes or replace them with your own logic.
+ """
+ def clamp(val, minval, maxval):
+ return max(minval, min(maxval, val))
+
+ ifactor1 = int(factor1 * 256)
+ ifactor2 = int(factor2 * 256)
+
+ width, height = dest.width, dest.height
+
+ if colorspace == 'L8':
+ for y in range(height):
+ for x in range(width):
+ sp1 = source1[x, y]
+ sp2 = source2[x, y]
+ blend_source1 = skip_source1_index is None or sp1 != skip_source1_index
+ blend_source2 = skip_source2_index is None or sp2 != skip_source2_index
+
+ if blend_source1 and blend_source2:
+ sda = sp1 * ifactor1
+ sca = sp2 * ifactor2
+
+ if blendmode == BlendMode.Screen:
+ blend = sca + sda - (sca * sda // 65536)
+ elif blendmode == BlendMode.Normal:
+ blend = sca + sda * (256 - ifactor2) // 256
+
+ denom = ifactor1 + ifactor2 - ifactor1 * ifactor2 // 256
+ pixel = blend // denom
+ elif blend_source1:
+ pixel = sp1 * ifactor1 // 256
+ elif blend_source2:
+ pixel = sp2 * ifactor2 // 256
+ else:
+ pixel = dest[x, y]
+
+ dest[x, y] = clamp(pixel, 0, 255)
+
+ else:
+ swap = colorspace in ('RGB565_SWAPPED', 'BGR565_SWAPPED')
+ r_mask = 0xf800
+ g_mask = 0x07e0
+ b_mask = 0x001f
+
+ for y in range(height):
+ for x in range(width):
+ sp1 = source1[x, y]
+ sp2 = source2[x, y]
+
+ if swap:
+ sp1 = ((sp1 & 0xFF) << 8) | ((sp1 >> 8) & 0xFF)
+ sp2 = ((sp2 & 0xFF) << 8) | ((sp2 >> 8) & 0xFF)
+
+ blend_source1 = skip_source1_index is None or sp1 != skip_source1_index
+ blend_source2 = skip_source2_index is None or sp2 != skip_source2_index
+
+ if blend_source1 and blend_source2:
+ ifactor_blend = ifactor1 + ifactor2 - ifactor1 * ifactor2 // 256
+
+ red_dca = ((sp1 & r_mask) >> 8) * ifactor1
+ grn_dca = ((sp1 & g_mask) >> 3) * ifactor1
+ blu_dca = ((sp1 & b_mask) << 3) * ifactor1
+
+ red_sca = ((sp2 & r_mask) >> 8) * ifactor2
+ grn_sca = ((sp2 & g_mask) >> 3) * ifactor2
+ blu_sca = ((sp2 & b_mask) << 3) * ifactor2
+
+ if blendmode == BlendMode.Screen:
+ red_blend = red_sca + red_dca - (red_sca * red_dca // 65536)
+ grn_blend = grn_sca + grn_dca - (grn_sca * grn_dca // 65536)
+ blu_blend = blu_sca + blu_dca - (blu_sca * blu_dca // 65536)
+ elif blendmode == BlendMode.Normal:
+ red_blend = red_sca + red_dca * (256 - ifactor2) // 256
+ grn_blend = grn_sca + grn_dca * (256 - ifactor2) // 256
+ blu_blend = blu_sca + blu_dca * (256 - ifactor2) // 256
+
+ r = ((red_blend // ifactor_blend) << 8) & r_mask
+ g = ((grn_blend // ifactor_blend) << 3) & g_mask
+ b = ((blu_blend // ifactor_blend) >> 3) & b_mask
+
+ pixel = (r & r_mask) | (g & g_mask) | (b & b_mask)
+
+ if swap:
+ pixel = ((pixel & 0xFF) << 8) | ((pixel >> 8) & 0xFF)
+
+ elif blend_source1:
+ r = ((sp1 & r_mask) * ifactor1 // 256) & r_mask
+ g = ((sp1 & g_mask) * ifactor1 // 256) & g_mask
+ b = ((sp1 & b_mask) * ifactor1 // 256) & b_mask
+ pixel = r | g | b
+ elif blend_source2:
+ r = ((sp2 & r_mask) * ifactor2 // 256) & r_mask
+ g = ((sp2 & g_mask) * ifactor2 // 256) & g_mask
+ b = ((sp2 & b_mask) * ifactor2 // 256) & b_mask
+ pixel = r | g | b
+ else:
+ pixel = dest[x, y]
+
+ print(f"pixel hex: {hex(pixel)}")
+ dest[x, y] = pixel
+
+class DitherAlgorithm:
+ Atkinson = "bitmaptools.DitherAlgorithm.Atkinson"
+ FloydStenberg = "bitmaptools.DitherAlgorithm.FloydStenberg"
+
+ atkinson = {
+ 'count': 4,
+ 'mx': 2,
+ 'dl': 256 // 8,
+ 'terms': [
+ {'dx': 2, 'dy': 0, 'dl': 256 // 8},
+ {'dx': -1, 'dy': 1, 'dl': 256 // 8},
+ {'dx': 0, 'dy': 1, 'dl': 256 // 8},
+ {'dx': 0, 'dy': 2, 'dl': 256 // 8},
+ ]
+ }
+
+ floyd_stenberg = {
+ 'count': 3,
+ 'mx': 1,
+ 'dl': 7 * 256 // 16,
+ 'terms': [
+ {'dx': -1, 'dy': 1, 'dl': 3 * 256 // 16},
+ {'dx': 0, 'dy': 1, 'dl': 5 * 256 // 16},
+ {'dx': 1, 'dy': 1, 'dl': 1 * 256 // 16},
+ ]
+ }
+
+ algorithm_map = {
+ Atkinson: atkinson,
+ FloydStenberg: floyd_stenberg
+ }
+
+
+def dither(dest_bitmap, source_bitmap, colorspace, algorithm=DitherAlgorithm.Atkinson):
+ SWAP_BYTES = 1 << 0
+ SWAP_RB = 1 << 1
+ height, width = dest_bitmap.width, dest_bitmap.height
+ swap_bytes = colorspace in (Colorspace.RGB565_SWAPPED, Colorspace.BGR565_SWAPPED)
+ swap_rb = colorspace in (Colorspace.BGR565, Colorspace.BGR565_SWAPPED)
+ algorithm_info = DitherAlgorithm.algorithm_map[algorithm]
+ mx = algorithm_info['mx']
+ count = algorithm_info['count']
+ terms = algorithm_info['terms']
+ dl = algorithm_info['dl']
+
+ swap = 0
+ if swap_bytes:
+ swap |= SWAP_BYTES
+
+ if swap_rb:
+ swap |= SWAP_RB
+
+ print(f"swap: {swap}")
+
+ # Create row data arrays (3 rows with padding on both sides)
+ rowdata = [[0] * (width + 2 * mx) for _ in range(3)]
+ rows = [
+ rowdata[0][mx:],
+ rowdata[1][mx:],
+ rowdata[2][mx:]
+ ]
+
+ # Output array for one row at a time (padded to multiple of 32)
+ out = [False] * (((width + 31) // 32) * 32)
+
+ # Helper function to fill a row with luminance data
+ def fill_row(bitmap, swap, luminance_data, y, mx):
+ if y >= bitmap.height:
+ return
+
+ # Zero out padding area
+ for i in range(mx):
+ luminance_data[-mx + i] = 0
+ luminance_data[bitmap.width + i] = 0
+
+ if bitmap._bits_per_value == 8:
+ for x in range(bitmap.width):
+ luminance_data[x] = bitmap[x, y]
+ else:
+ for x in range(bitmap.width):
+ pixel = bitmap[x, y]
+ if swap & SWAP_BYTES:
+ # Swap bytes (equivalent to __builtin_bswap16)
+ pixel = ((pixel & 0xFF) << 8) | ((pixel >> 8) & 0xFF)
+
+ r = (pixel >> 8) & 0xF8
+ g = (pixel >> 3) & 0xFC
+ b = (pixel << 3) & 0xF8
+
+ if swap & SWAP_BYTES:
+ r, b = b, r
+
+ # Calculate luminance using same formula as C version
+ luminance_data[x] = (r * 78 + g * 154 + b * 29) // 256
+
+ # Helper function to write pixels to destination bitmap
+ def write_pixels(bitmap, y, data):
+ if bitmap._bits_per_value == 1:
+ for i in range(0, bitmap.width, 32):
+ # Pack 32 bits into an integer
+ p = 0
+ for j in range(min(32, bitmap.width - i)):
+ p = (p << 1)
+ if data[i + j]:
+ p |= 1
+
+ # Write packed value
+ for j in range(min(32, bitmap.width - i)):
+ bitmap[i + j, y] = (p >> (31 - j)) & 1
+ else:
+ for i in range(bitmap.width):
+ bitmap[i, y] = 65535 if data[i] else 0
+
+ # Fill initial rows
+ fill_row(source_bitmap, swap, rows[0], 0, mx)
+ fill_row(source_bitmap, swap, rows[1], 1, mx)
+ fill_row(source_bitmap, swap, rows[2], 2, mx)
+
+ err = 0
+
+ for y in range(height):
+ # Going left to right
+ for x in range(width):
+ pixel_in = rows[0][x] + err
+ pixel_out = pixel_in >= 128
+ out[x] = pixel_out
+
+ err = pixel_in - (255 if pixel_out else 0)
+
+ # Distribute error to neighboring pixels
+ for i in range(count):
+ x1 = x + terms[i]['dx']
+ dy = terms[i]['dy']
+
+ rows[dy][x1] = ((terms[i]['dl'] * err) // 256) + rows[dy][x1]
+
+ err = (err * dl) // 256
+
+ write_pixels(dest_bitmap, y, out)
+
+ # Cycle the rows
+ rows[0], rows[1], rows[2] = rows[1], rows[2], rows[0]
+
+ y += 1
+ if y == height:
+ break
+
+ # Fill the next row for future processing
+ fill_row(source_bitmap, swap, rows[2], y + 2, mx)
+
+ # Going right to left
+ for x in range(width - 1, -1, -1):
+ pixel_in = rows[0][x] + err
+ pixel_out = pixel_in >= 128
+ out[x] = pixel_out
+
+ err = pixel_in - (255 if pixel_out else 0)
+
+ # Distribute error to neighboring pixels (in reverse direction)
+ for i in range(count):
+ x1 = x - terms[i]['dx']
+ dy = terms[i]['dy']
+
+ rows[dy][x1] = ((terms[i]['dl'] * err) // 256) + rows[dy][x1]
+
+ err = (err * dl) // 256
+
+ write_pixels(dest_bitmap, y, out)
+
+ # Cycle the rows again
+ rows[0], rows[1], rows[2] = rows[1], rows[2], rows[0]
+
+ # Fill the next row for future processing
+ fill_row(source_bitmap, swap, rows[2], y + 3, mx)
+
+ # Mark the entire bitmap as dirty (this would be implementation-specific)
+ # In CircuitPython, this might be something like:
+ dest_bitmap.dirty()
\ No newline at end of file
projects / hackapet / Adafruit_Blinka_Displayio.git / blobdiff