67 lines
2.2 KiB
Python
67 lines
2.2 KiB
Python
# The MIT License (MIT)
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#
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# Copyright (c) 2019 Scott Shawcroft for Adafruit Industries LLC
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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"""
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`adafruit_bitmap_font.glyph_cache`
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====================================================
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Displays text using CircuitPython's displayio.
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* Author(s): Scott Shawcroft
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Implementation Notes
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--------------------
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**Hardware:**
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**Software and Dependencies:**
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* Adafruit CircuitPython firmware for the supported boards:
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https://github.com/adafruit/circuitpython/releases
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"""
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import gc
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__version__ = "0.0.0-auto.0"
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__repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_Bitmap_Font.git"
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class GlyphCache:
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"""Caches glyphs loaded by a subclass."""
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def __init__(self):
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self._glyphs = {}
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def load_glyphs(self, code_points):
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"""Loads displayio.Glyph objects into the GlyphCache from the font."""
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def get_glyph(self, code_point):
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"""Returns a displayio.Glyph for the given code point or None is unsupported."""
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if code_point in self._glyphs:
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return self._glyphs[code_point]
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code_points = set()
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code_points.add(code_point)
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self._glyphs[code_point] = None
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self.load_glyphs(code_points)
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gc.collect()
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return self._glyphs[code_point]
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