88 lines
3.5 KiB
Python
88 lines
3.5 KiB
Python
"""
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Iamge
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MicroPython library for the Iamge(jpeg C module)
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=======================================================
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@dahanzimin From the Mixly Team
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"""
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import gc
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import urequests
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from base64 import b64encode
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from jpeg import Encoder, Decoder
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class IMG:
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def __init__(self, image, width, height):
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self.image = image
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self.width = width
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self.height = height
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self.format = "RGB565"
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class Image:
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def save(self, img, path="mixly.jpg", **kwargs):
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'''quality(1-100), rotation (0, 90, 180, 270)'''
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_encoder = Encoder(pixel_format="RGB565_BE", width=img.width, height=img.height, **kwargs)
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_jpeg = _encoder.encode(img.image)
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del _encoder
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gc.collect()
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if isinstance(path, str):
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with open(path, 'wb') as f:
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f.write(_jpeg)
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else:
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return _jpeg
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def open(self, path="mixly.jpg", scale_width=None, scale_height=None, tft_width=240, tft_height=240, **kwargs):
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'''rotation (0, 90, 180, 270), clipper_width, clipper_height'''
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with open(path, "rb") as f:
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_jpeg = f.read()
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return self._jpg_decoder(_jpeg, scale_width, scale_height, tft_width, tft_height, **kwargs)
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def convert(self, img, formats=0, **kwargs):
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if formats == 0:
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return self.save(img, None, **kwargs)
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elif formats == 1:
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return b'data:image/jpg;base64,' + b64encode(self.save(img, None, **kwargs))
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def download(self, url, path=None, scale_width=None, scale_height=None, tft_width=240, tft_height=240, block=1024, **kwargs):
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'''rotation (0, 90, 180, 270), clipper_width, clipper_height'''
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response = urequests.get(url, stream=True)
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if path is None:
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_image = self._jpg_decoder(response.raw.read(), scale_width, scale_height, tft_width, tft_height, **kwargs)
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response.close()
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return _image
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else:
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with open(path, 'wb') as f:
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while True:
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_data = response.raw.read(block)
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if not _data:
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break
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else:
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f.write(_data)
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response.close()
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def _jpg_decoder(self, jpg, scale_width, scale_height, tft_width, tft_height, **kwargs):
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'''Automatically zoom based on the screen'''
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if scale_width is None or scale_height is None:
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_width = tft_width
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_height = tft_height
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for i in range(min(len(jpg), 1024)):
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if jpg[i] == 0xFF and (jpg[i + 1] & 0xF0) == 0xC0:
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if jpg[i + 1] not in [0xC4, 0xC8, 0xCC]:
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_width = jpg[i + 7] << 8 | jpg[i + 8]
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_height = jpg[i + 5] << 8| jpg[i + 6]
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break
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if _width > tft_width or _height > tft_height:
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_scale = max(_width / tft_width, _height / tft_height) * 8
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_decoder = Decoder(pixel_format="RGB565_BE", scale_width=round(_width / _scale) * 8, scale_height=round(_height / _scale) * 8, **kwargs)
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else:
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_decoder = Decoder(pixel_format="RGB565_BE", **kwargs)
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else:
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_decoder = Decoder(pixel_format="RGB565_BE", scale_width=scale_width // 8 * 8, scale_height=scale_height // 8 * 8, **kwargs)
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_info = _decoder.get_img_info(jpg)
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_image = IMG(_decoder.decode(jpg), _info[0], _info[1])
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del _decoder, jpg
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gc.collect()
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return _image
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#图像处理
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Image = Image()
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