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trying to implement fill_row function
[hackapet/Adafruit_Blinka_Displayio.git] / displayio / tilegrid.py
1 # The MIT License (MIT)
2 #
3 # Copyright (c) 2020 Melissa LeBlanc-Williams for Adafruit Industries
4 #
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:
11 #
12 # The above copyright notice and this permission notice shall be included in
13 # all copies or substantial portions of the Software.
14 #
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
21 # THE SOFTWARE.
22
23 """
24 `displayio.tilegrid`
25 ================================================================================
26
27 displayio for Blinka
28
29 **Software and Dependencies:**
30
31 * Adafruit Blinka:
32   https://github.com/adafruit/Adafruit_Blinka/releases
33
34 * Author(s): Melissa LeBlanc-Williams
35
36 """
37
38 from recordclass import recordclass
39 from PIL import Image
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
45
46 __version__ = "0.0.0-auto.0"
47 __repo__ = "https://github.com/adafruit/Adafruit_Blinka_displayio.git"
48
49 Rectangle = recordclass("Rectangle", "x1 y1 x2 y2")
50 Transform = recordclass("Transform", "x y dx dy scale transpose_xy mirror_x mirror_y")
51
52 # pylint: disable=too-many-instance-attributes
53 class TileGrid:
54     """Position a grid of tiles sourced from a bitmap and pixel_shader combination. Multiple
55     grids can share bitmaps and pixel shaders.
56
57     A single tile grid is also known as a Sprite.
58     """
59
60     def __init__(
61         self,
62         bitmap,
63         *,
64         pixel_shader,
65         width=1,
66         height=1,
67         tile_width=None,
68         tile_height=None,
69         default_tile=0,
70         x=0,
71         y=0
72     ):
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.
76
77         tile_width and tile_height match the height of the bitmap by default.
78         """
79         if not isinstance(bitmap, (Bitmap, OnDiskBitmap, Shape)):
80             raise ValueError("Unsupported Bitmap type")
81         self._bitmap = bitmap
82         bitmap_width = bitmap.width
83         bitmap_height = bitmap.height
84
85         if pixel_shader is not None and not isinstance(
86             pixel_shader, (ColorConverter, Palette)
87         ):
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
92         self._hidden = False
93         self._x = x
94         self._y = y
95         self._width = width  # Number of Tiles Wide
96         self._height = height  # Number of Tiles High
97         self._transpose_xy = False
98         self._flip_x = False
99         self._flip_y = False
100         self._top_left_x = 0
101         self._top_left_y = 0
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
106         if tile_width < 1:
107             tile_width = 1
108         if tile_height < 1:
109             tile_height = 1
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)
124         self._moved = False
125
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()
132
133     def _update_current_x(self):
134         if self._transpose_xy:
135             width = self._pixel_height
136         else:
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
141             )
142             self._current_area.y2 = (
143                 self._absolute_transform.y
144                 + self._absolute_transform.dy * (self._x + width)
145             )
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,
150                 )
151         else:
152             self._current_area.x1 = (
153                 self._absolute_transform.x + self._absolute_transform.dx * self._x
154             )
155             self._current_area.x2 = (
156                 self._absolute_transform.x
157                 + self._absolute_transform.dx * (self._x + width)
158             )
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,
163                 )
164
165     def _update_current_y(self):
166         if self._transpose_xy:
167             height = self._pixel_width
168         else:
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
173             )
174             self._current_area.x2 = (
175                 self._absolute_transform.x
176                 + self._absolute_transform.dx * (self._y + height)
177             )
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,
182                 )
183         else:
184             self._current_area.y1 = (
185                 self._absolute_transform.y + self._absolute_transform.dy * self._y
186             )
187             self._current_area.y2 = (
188                 self._absolute_transform.y
189                 + self._absolute_transform.dy * (self._y + height)
190             )
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,
195                 )
196
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)
202         return pixel_value
203
204     def _apply_palette(self, image):
205         image.putpalette(
206             self._pixel_shader._get_palette()  # pylint: disable=protected-access
207         )
208
209     def _add_alpha(self, image):
210         alpha = self._bitmap._image.copy().convert(  # pylint: disable=protected-access
211             "P"
212         )
213         alpha.putpalette(
214             self._pixel_shader._get_alpha_palette()  # pylint: disable=protected-access
215         )
216         image.putalpha(alpha.convert("L"))
217
218     # pylint: disable=too-many-locals,too-many-branches
219     def _fill_area(self, buffer):
220         """Draw onto the image"""
221         if self._hidden:
222             return
223
224         if self._bitmap.width <= 0 or self._bitmap.height <= 0:
225             return
226
227         image = Image.new(
228             "RGBA",
229             (self._width * self._tile_width, self._height * self._tile_height),
230             (0, 0, 0, 0),
231         )
232
233         tile_count_x = self._bitmap.width // self._tile_width
234         x = self._x
235         y = self._y
236
237         for tile_x in range(self._width):
238             for tile_y in range(self._height):
239                 tile_index = self._tiles[tile_y * self._width + tile_x]
240                 tile_index_x = tile_index % tile_count_x
241                 tile_index_y = tile_index // tile_count_x
242                 tile_image = self._bitmap._image  # pylint: disable=protected-access
243                 if isinstance(self._pixel_shader, Palette):
244                     tile_image = tile_image.copy().convert("P")
245                     self._apply_palette(tile_image)
246                     tile_image = tile_image.convert("RGBA")
247                     self._add_alpha(tile_image)
248                 elif isinstance(self._pixel_shader, ColorConverter):
249                     # This will be needed for eInks, grayscale, and monochrome displays
250                     pass
251                 image.alpha_composite(
252                     tile_image,
253                     dest=(tile_x * self._tile_width, tile_y * self._tile_height),
254                     source=(
255                         tile_index_x * self._tile_width,
256                         tile_index_y * self._tile_height,
257                     ),
258                 )
259
260         if self._absolute_transform is not None:
261             if self._absolute_transform.scale > 1:
262                 image = image.resize(
263                     (
264                         self._pixel_width * self._absolute_transform.scale,
265                         self._pixel_height * self._absolute_transform.scale,
266                     ),
267                     resample=Image.NEAREST,
268                 )
269             if self._absolute_transform.mirror_x:
270                 image = image.transpose(Image.FLIP_LEFT_RIGHT)
271             if self._absolute_transform.mirror_y:
272                 image = image.transpose(Image.FLIP_TOP_BOTTOM)
273             if self._absolute_transform.transpose_xy:
274                 image = image.transpose(Image.TRANSPOSE)
275             x *= self._absolute_transform.dx
276             y *= self._absolute_transform.dy
277             x += self._absolute_transform.x
278             y += self._absolute_transform.y
279
280         source_x = source_y = 0
281         if x < 0:
282             source_x = 0 - x
283             x = 0
284         if y < 0:
285             source_y = 0 - y
286             y = 0
287
288         buffer.alpha_composite(
289             image, (round(x), round(y)), source=(round(source_x), round(source_y))
290         )
291
292     # pylint: enable=too-many-locals,too-many-branches
293
294     @property
295     def hidden(self):
296         """True when the TileGrid is hidden. This may be False even
297         when a part of a hidden Group."""
298         return self._hidden
299
300     @hidden.setter
301     def hidden(self, value):
302         if not isinstance(value, (bool, int)):
303             raise ValueError("Expecting a boolean or integer value")
304         self._hidden = bool(value)
305
306     @property
307     def x(self):
308         """X position of the left edge in the parent."""
309         return self._x
310
311     @x.setter
312     def x(self, value):
313         if not isinstance(value, int):
314             raise TypeError("X should be a integer type")
315         if self._x != value:
316             self._x = value
317             self._update_current_x()
318
319     @property
320     def y(self):
321         """Y position of the top edge in the parent."""
322         return self._y
323
324     @y.setter
325     def y(self, value):
326         if not isinstance(value, int):
327             raise TypeError("Y should be a integer type")
328         if self._y != value:
329             self._y = value
330             self._update_current_y()
331
332     @property
333     def flip_x(self):
334         """If true, the left edge rendered will be the right edge of the right-most tile."""
335         return self._flip_x
336
337     @flip_x.setter
338     def flip_x(self, value):
339         if not isinstance(value, bool):
340             raise TypeError("Flip X should be a boolean type")
341         if self._flip_x != value:
342             self._flip_x = value
343
344     @property
345     def flip_y(self):
346         """If true, the top edge rendered will be the bottom edge of the bottom-most tile."""
347         return self._flip_y
348
349     @flip_y.setter
350     def flip_y(self, value):
351         if not isinstance(value, bool):
352             raise TypeError("Flip Y should be a boolean type")
353         if self._flip_y != value:
354             self._flip_y = value
355
356     @property
357     def transpose_xy(self):
358         """If true, the TileGrid’s axis will be swapped. When combined with mirroring, any 90
359         degree rotation can be achieved along with the corresponding mirrored version.
360         """
361         return self._transpose_xy
362
363     @transpose_xy.setter
364     def transpose_xy(self, value):
365         if not isinstance(value, bool):
366             raise TypeError("Transpose XY should be a boolean type")
367         if self._transpose_xy != value:
368             self._transpose_xy = value
369             self._update_current_x()
370             self._update_current_y()
371
372     @property
373     def pixel_shader(self):
374         """The pixel shader of the tilegrid."""
375         return self._pixel_shader
376
377     def __getitem__(self, index):
378         """Returns the tile index at the given index. The index can either be
379         an x,y tuple or an int equal to ``y * width + x``'.
380         """
381         if isinstance(index, (tuple, list)):
382             x = index[0]
383             y = index[1]
384             index = y * self._width + x
385         elif isinstance(index, int):
386             x = index % self._width
387             y = index // self._width
388         if x > self._width or y > self._height or index >= len(self._tiles):
389             raise ValueError("Tile index out of bounds")
390         return self._tiles[index]
391
392     def __setitem__(self, index, value):
393         """Sets the tile index at the given index. The index can either be
394         an x,y tuple or an int equal to ``y * width + x``.
395         """
396         if isinstance(index, (tuple, list)):
397             x = index[0]
398             y = index[1]
399             index = y * self._width + x
400         elif isinstance(index, int):
401             x = index % self._width
402             y = index // self._width
403         if x > self._width or y > self._height or index >= len(self._tiles):
404             raise ValueError("Tile index out of bounds")
405         if not 0 <= value <= 255:
406             raise ValueError("Tile value out of bounds")
407         self._tiles[index] = value
408
409
410 # pylint: enable=too-many-instance-attributes