1 # The MIT License (MIT)
3 # Copyright (c) 2020 Melissa LeBlanc-Williams for Adafruit Industries
5 # Permission is hereby granted, free of charge, to any person obtaining a copy
6 # of this software and associated documentation files (the "Software"), to deal
7 # in the Software without restriction, including without limitation the rights
8 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 # copies of the Software, and to permit persons to whom the Software is
10 # furnished to do so, subject to the following conditions:
12 # The above copyright notice and this permission notice shall be included in
13 # all copies or substantial portions of the Software.
15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 ================================================================================
29 **Software and Dependencies:**
32 https://github.com/adafruit/Adafruit_Blinka/releases
34 * Author(s): Melissa LeBlanc-Williams
38 from recordclass import recordclass
40 from displayio.bitmap import Bitmap
41 from displayio.colorconverter import ColorConverter
42 from displayio.ondiskbitmap import OnDiskBitmap
43 from displayio.shape import Shape
44 from displayio.palette import Palette
46 __version__ = "0.0.0-auto.0"
47 __repo__ = "https://github.com/adafruit/Adafruit_Blinka_displayio.git"
49 Rectangle = recordclass("Rectangle", "x1 y1 x2 y2")
50 Transform = recordclass("Transform", "x y dx dy scale transpose_xy mirror_x mirror_y")
52 # pylint: disable=too-many-instance-attributes
54 """Position a grid of tiles sourced from a bitmap and pixel_shader combination. Multiple
55 grids can share bitmaps and pixel shaders.
57 A single tile grid is also known as a Sprite.
73 """Create a TileGrid object. The bitmap is source for 2d pixels. The pixel_shader is
74 used to convert the value and its location to a display native pixel color. This may
75 be a simple color palette lookup, a gradient, a pattern or a color transformer.
77 tile_width and tile_height match the height of the bitmap by default.
79 if not isinstance(bitmap, (Bitmap, OnDiskBitmap, Shape)):
80 raise ValueError("Unsupported Bitmap type")
82 bitmap_width = bitmap.width
83 bitmap_height = bitmap.height
85 if pixel_shader is not None and not isinstance(
86 pixel_shader, (ColorConverter, Palette)
88 raise ValueError("Unsupported Pixel Shader type")
89 self._pixel_shader = pixel_shader
90 if isinstance(self._pixel_shader, ColorConverter):
91 self._pixel_shader._rgba = True # pylint: disable=protected-access
95 self._width = width # Number of Tiles Wide
96 self._height = height # Number of Tiles High
97 self._transpose_xy = False
102 if tile_width is None or tile_width == 0:
103 tile_width = bitmap_width
104 if tile_height is None or tile_width == 0:
105 tile_height = bitmap_height
110 if bitmap_width % tile_width != 0:
111 raise ValueError("Tile width must exactly divide bitmap width")
112 self._tile_width = tile_width
113 if bitmap_height % tile_height != 0:
114 raise ValueError("Tile height must exactly divide bitmap height")
115 self._tile_height = tile_height
116 if not 0 <= default_tile <= 255:
117 raise ValueError("Default Tile is out of range")
118 self._pixel_width = width * tile_width
119 self._pixel_height = height * tile_height
120 self._tiles = (self._width * self._height) * [default_tile]
121 self.in_group = False
122 self._absolute_transform = Transform(0, 0, 1, 1, 1, False, False, False)
123 self._current_area = Rectangle(0, 0, self._pixel_width, self._pixel_height)
126 def update_transform(self, absolute_transform):
127 """Update the parent transform and child transforms"""
128 self._absolute_transform = absolute_transform
129 if self._absolute_transform is not None:
130 self._update_current_x()
131 self._update_current_y()
133 def _update_current_x(self):
134 if self._transpose_xy:
135 width = self._pixel_height
137 width = self._pixel_width
138 if self._absolute_transform.transpose_xy:
139 self._current_area.y1 = (
140 self._absolute_transform.y + self._absolute_transform.dy * self._x
142 self._current_area.y2 = (
143 self._absolute_transform.y
144 + self._absolute_transform.dy * (self._x + width)
146 if self._current_area.y2 < self._current_area.y1:
147 self._current_area.y1, self._current_area.y2 = (
148 self._current_area.y2,
149 self._current_area.y1,
152 self._current_area.x1 = (
153 self._absolute_transform.x + self._absolute_transform.dx * self._x
155 self._current_area.x2 = (
156 self._absolute_transform.x
157 + self._absolute_transform.dx * (self._x + width)
159 if self._current_area.x2 < self._current_area.x1:
160 self._current_area.x1, self._current_area.x2 = (
161 self._current_area.x2,
162 self._current_area.x1,
165 def _update_current_y(self):
166 if self._transpose_xy:
167 height = self._pixel_width
169 height = self._pixel_height
170 if self._absolute_transform.transpose_xy:
171 self._current_area.x1 = (
172 self._absolute_transform.x + self._absolute_transform.dx * self._y
174 self._current_area.x2 = (
175 self._absolute_transform.x
176 + self._absolute_transform.dx * (self._y + height)
178 if self._current_area.x2 < self._current_area.x1:
179 self._current_area.x1, self._current_area.x2 = (
180 self._current_area.x2,
181 self._current_area.x1,
184 self._current_area.y1 = (
185 self._absolute_transform.y + self._absolute_transform.dy * self._y
187 self._current_area.y2 = (
188 self._absolute_transform.y
189 + self._absolute_transform.dy * (self._y + height)
191 if self._current_area.y2 < self._current_area.y1:
192 self._current_area.y1, self._current_area.y2 = (
193 self._current_area.y2,
194 self._current_area.y1,
197 def _shade(self, pixel_value):
198 if isinstance(self._pixel_shader, Palette):
199 return self._pixel_shader[pixel_value]["rgba"]
200 if isinstance(self._pixel_shader, ColorConverter):
201 return self._pixel_shader.convert(pixel_value)
204 def _apply_palette(self, image):
206 self._pixel_shader._get_palette() # pylint: disable=protected-access
209 def _add_alpha(self, image):
210 alpha = self._bitmap._image.copy().convert( # pylint: disable=protected-access
214 self._pixel_shader._get_alpha_palette() # pylint: disable=protected-access
216 image.putalpha(alpha.convert("L"))
218 # pylint: disable=too-many-locals,too-many-branches,too-many-statements
219 def _fill_area(self, buffer):
220 """Draw onto the image"""
224 if self._bitmap.width <= 0 or self._bitmap.height <= 0:
227 # Copy class variables to local variables in case something changes
231 height = self._height
232 tile_width = self._tile_width
233 tile_height = self._tile_height
234 bitmap_width = self._bitmap.width
235 pixel_width = self._pixel_width
236 pixel_height = self._pixel_height
238 absolute_transform = self._absolute_transform
239 pixel_shader = self._pixel_shader
240 bitmap = self._bitmap
243 tile_count_x = bitmap_width // tile_width
246 "RGBA", (width * tile_width, height * tile_height), (0, 0, 0, 0),
249 for tile_x in range(width):
250 for tile_y in range(height):
251 tile_index = tiles[tile_y * width + tile_x]
252 tile_index_x = tile_index % tile_count_x
253 tile_index_y = tile_index // tile_count_x
254 tile_image = bitmap._image # pylint: disable=protected-access
255 if isinstance(pixel_shader, Palette):
256 tile_image = tile_image.copy().convert("P")
257 self._apply_palette(tile_image)
258 tile_image = tile_image.convert("RGBA")
259 self._add_alpha(tile_image)
260 elif isinstance(pixel_shader, ColorConverter):
261 # This will be needed for eInks, grayscale, and monochrome displays
263 image.alpha_composite(
265 dest=(tile_x * tile_width, tile_y * tile_height),
266 source=(tile_index_x * tile_width, tile_index_y * tile_height,),
269 if absolute_transform is not None:
270 if absolute_transform.scale > 1:
271 image = image.resize(
273 int(pixel_width * absolute_transform.scale),
274 int(pixel_height * absolute_transform.scale,)
276 resample=Image.NEAREST,
278 if absolute_transform.mirror_x:
279 image = image.transpose(Image.FLIP_LEFT_RIGHT)
280 if absolute_transform.mirror_y:
281 image = image.transpose(Image.FLIP_TOP_BOTTOM)
282 if absolute_transform.transpose_xy:
283 image = image.transpose(Image.TRANSPOSE)
284 x *= absolute_transform.dx
285 y *= absolute_transform.dy
286 x += absolute_transform.x
287 y += absolute_transform.y
289 source_x = source_y = 0
291 source_x = round(0 - x)
294 source_y = round(0 - y)
302 and y <= buffer.height
303 and source_x <= image.width
304 and source_y <= image.height
306 buffer.alpha_composite(image, (x, y), source=(source_x, source_y))
308 # pylint: enable=too-many-locals,too-many-branches
312 """True when the TileGrid is hidden. This may be False even
313 when a part of a hidden Group."""
317 def hidden(self, value):
318 if not isinstance(value, (bool, int)):
319 raise ValueError("Expecting a boolean or integer value")
320 self._hidden = bool(value)
324 """X position of the left edge in the parent."""
329 if not isinstance(value, int):
330 raise TypeError("X should be a integer type")
333 self._update_current_x()
337 """Y position of the top edge in the parent."""
342 if not isinstance(value, int):
343 raise TypeError("Y should be a integer type")
346 self._update_current_y()
350 """If true, the left edge rendered will be the right edge of the right-most tile."""
354 def flip_x(self, value):
355 if not isinstance(value, bool):
356 raise TypeError("Flip X should be a boolean type")
357 if self._flip_x != value:
362 """If true, the top edge rendered will be the bottom edge of the bottom-most tile."""
366 def flip_y(self, value):
367 if not isinstance(value, bool):
368 raise TypeError("Flip Y should be a boolean type")
369 if self._flip_y != value:
373 def transpose_xy(self):
374 """If true, the TileGrid’s axis will be swapped. When combined with mirroring, any 90
375 degree rotation can be achieved along with the corresponding mirrored version.
377 return self._transpose_xy
380 def transpose_xy(self, value):
381 if not isinstance(value, bool):
382 raise TypeError("Transpose XY should be a boolean type")
383 if self._transpose_xy != value:
384 self._transpose_xy = value
385 self._update_current_x()
386 self._update_current_y()
389 def pixel_shader(self):
390 """The pixel shader of the tilegrid."""
391 return self._pixel_shader
393 def __getitem__(self, index):
394 """Returns the tile index at the given index. The index can either be
395 an x,y tuple or an int equal to ``y * width + x``'.
397 if isinstance(index, (tuple, list)):
400 index = y * self._width + x
401 elif isinstance(index, int):
402 x = index % self._width
403 y = index // self._width
404 if x > self._width or y > self._height or index >= len(self._tiles):
405 raise ValueError("Tile index out of bounds")
406 return self._tiles[index]
408 def __setitem__(self, index, value):
409 """Sets the tile index at the given index. The index can either be
410 an x,y tuple or an int equal to ``y * width + x``.
412 if isinstance(index, (tuple, list)):
415 index = y * self._width + x
416 elif isinstance(index, int):
417 x = index % self._width
418 y = index // self._width
419 if x > self._width or y > self._height or index >= len(self._tiles):
420 raise ValueError("Tile index out of bounds")
421 if not 0 <= value <= 255:
422 raise ValueError("Tile value out of bounds")
423 self._tiles[index] = value
426 # pylint: enable=too-many-instance-attributes