2 from typing import Optional, Tuple
4 from displayio import Bitmap
5 import circuitpython_typing
8 def fill_region(dest_bitmap: Bitmap, x1: int, y1: int, x2: int, y2: int, value: int):
9 for y in range(y1, y2):
10 for x in range(x1, x2):
11 dest_bitmap[x, y] = value
14 def draw_line(dest_bitmap: Bitmap, x1: int, y1: int, x2: int, y2: int, value: int):
16 sx = 1 if x1 < x2 else -1
18 sy = 1 if y1 < y2 else -1
22 dest_bitmap[x1, y1] = value
23 if x1 == x2 and y1 == y2:
34 def draw_circle(dest_bitmap: Bitmap, x: int, y: int, radius: int, value: int):
35 x = max(0, min(x, dest_bitmap.width - 1))
36 y = max(0, min(y, dest_bitmap.height - 1))
42 # Bresenham's circle algorithm
44 dest_bitmap[xb + x, yb + y] = value
45 dest_bitmap[-xb + x, -yb + y] = value
46 dest_bitmap[-xb + x, yb + y] = value
47 dest_bitmap[xb + x, -yb + y] = value
48 dest_bitmap[yb + x, xb + y] = value
49 dest_bitmap[-yb + x, xb + y] = value
50 dest_bitmap[-yb + x, -xb + y] = value
51 dest_bitmap[yb + x, -xb + y] = value
56 d = d + 4 * (xb - yb) + 10
61 def draw_polygon(dest_bitmap: Bitmap,
62 xs: circuitpython_typing.ReadableBuffer,
63 ys: circuitpython_typing.ReadableBuffer,
64 value: int, close: bool | None = True):
65 if len(xs) != len(ys):
66 raise ValueError("Length of xs and ys must be equal.")
68 for i in range(len(xs) - 1):
69 cur_point = (xs[i], ys[i])
70 next_point = (xs[i + 1], ys[i + 1])
71 print(f"cur: {cur_point}, next: {next_point}")
72 draw_line(dest_bitmap=dest_bitmap,
73 x1=cur_point[0], y1=cur_point[1],
74 x2=next_point[0], y2=next_point[1],
78 print(f"close: {(xs[0], ys[0])} - {(xs[-1], ys[-1])}")
79 draw_line(dest_bitmap=dest_bitmap,
85 def blit(dest_bitmap: Bitmap, source_bitmap: Bitmap,
87 x1: int = 0, y1: int = 0,
88 x2: int | None = None, y2: int | None = None,
89 skip_source_index: int | None = None,
90 skip_dest_index: int | None = None):
91 """Inserts the source_bitmap region defined by rectangular boundaries"""
92 # pylint: disable=invalid-name
94 x2 = source_bitmap.width
96 y2 = source_bitmap.height
98 # Rearrange so that x1 < x2 and y1 < y2
104 # Ensure that x2 and y2 are within source bitmap size
105 x2 = min(x2, source_bitmap.width)
106 y2 = min(y2, source_bitmap.height)
108 for y_count in range(y2 - y1):
109 for x_count in range(x2 - x1):
110 x_placement = x + x_count
111 y_placement = y + y_count
113 if (dest_bitmap.width > x_placement >= 0) and (
114 dest_bitmap.height > y_placement >= 0
115 ): # ensure placement is within target bitmap
116 # get the palette index from the source bitmap
117 this_pixel_color = source_bitmap[
118 y1 + (y_count * source_bitmap.width) + x1 + x_count
121 if (skip_source_index is None) or (this_pixel_color != skip_source_index):
122 if (skip_dest_index is None) or (
123 dest_bitmap[y_placement * dest_bitmap.width + x_placement] != skip_dest_index):
124 dest_bitmap[ # Direct index into a bitmap array is speedier than [x,y] tuple
125 y_placement * dest_bitmap.width + x_placement
127 elif y_placement > dest_bitmap.height:
137 dest_clip0: Tuple[int, int],
138 dest_clip1: Tuple[int, int],
141 source_clip0: Tuple[int, int],
142 source_clip1: Tuple[int, int],
147 dest_clip0_x, dest_clip0_y = dest_clip0
148 dest_clip1_x, dest_clip1_y = dest_clip1
149 source_clip0_x, source_clip0_y = source_clip0
150 source_clip1_x, source_clip1_y = source_clip1
157 sin_angle = math.sin(angle)
158 cos_angle = math.cos(angle)
160 def update_bounds(dx, dy):
161 nonlocal minx, maxx, miny, maxy
171 w = source_bitmap.width
172 h = source_bitmap.height
174 dx = -cos_angle * px * scale + sin_angle * py * scale + ox
175 dy = -sin_angle * px * scale - cos_angle * py * scale + oy
176 update_bounds(dx, dy)
178 dx = cos_angle * (w - px) * scale + sin_angle * py * scale + ox
179 dy = sin_angle * (w - px) * scale - cos_angle * py * scale + oy
180 update_bounds(dx, dy)
182 dx = cos_angle * (w - px) * scale - sin_angle * (h - py) * scale + ox
183 dy = sin_angle * (w - px) * scale + cos_angle * (h - py) * scale + oy
184 update_bounds(dx, dy)
186 dx = -cos_angle * px * scale - sin_angle * (h - py) * scale + ox
187 dy = -sin_angle * px * scale + cos_angle * (h - py) * scale + oy
188 update_bounds(dx, dy)
190 # Clip to destination area
191 minx = max(minx, dest_clip0_x)
192 maxx = min(maxx, dest_clip1_x - 1)
193 miny = max(miny, dest_clip0_y)
194 maxy = min(maxy, dest_clip1_y - 1)
196 dv_col = cos_angle / scale
197 du_col = sin_angle / scale
201 startu = px - (ox * dv_col + oy * du_col)
202 startv = py - (ox * dv_row + oy * du_row)
204 rowu = startu + miny * du_col
205 rowv = startv + miny * dv_col
207 for y in range(miny, maxy + 1):
208 u = rowu + minx * du_row
209 v = rowv + minx * dv_row
210 for x in range(minx, maxx + 1):
211 if (source_clip0_x <= u < source_clip1_x) and (source_clip0_y <= v < source_clip1_y):
212 c = source_bitmap[int(u), int(v)]
213 if skip_index is None or c != skip_index:
214 dest_bitmap[x, y] = c
223 data: circuitpython_typing.ReadableBuffer,
224 x1: int = 0, y1: int = 0,
225 x2: int | None = None, y2: int | None = None,
226 skip_index: int | None = None):
233 _value_count = 2 ** bitmap._bits_per_value
234 for y in range(y1, y2):
235 for x in range(x1, x2):
236 i = y * (x2 - x1) + x
237 value = int(data[i] % _value_count)
238 if skip_index is None or value != skip_index: