更新自强的image处理支持自动缩放屏幕尺寸，及下载网络图片

boards/default_src/micropython_esp32s3/origin/build/lib/camera.py

@@ -5,7 +5,8 @@ MicroPython library for the Camera(Inherit C module)
 =======================================================
 @dahanzimin From the Mixly Team
 """
-import time
+import time, gc
+import urequests
 from _camera import *
 from base64 import b64encode
 from machine import SoftI2C, Pin
@@ -33,6 +34,7 @@ class Camera(Camera):
 
     def deinit(self):
         super().deinit()
+        gc.collect()
         onboard_bot.cam_reset(0, 0)
         onboard_bot.cam_en(0, 100)
 
@@ -46,29 +48,70 @@ class Camera(Camera):
         return IMG(super().capture(), self.get_pixel_width(), self.get_pixel_height())
 
 class Image:
-    def save(self, img, path="mixly.jpg", quality=90, rotation=0, **kwargs):
-        _encoder = Encoder(pixel_format="RGB565_BE", quality=quality, rotation=rotation, width=img.width, height=img.height, **kwargs)
+    def save(self, img, path="mixly.jpg", **kwargs):
+        '''quality(1-100), rotation (0, 90, 180, 270)'''
+        _encoder = Encoder(pixel_format="RGB565_BE", width=img.width, height=img.height, **kwargs)
         _jpeg = _encoder.encode(img.image)
         del _encoder
+        gc.collect()
         if isinstance(path, str):
             with open(path, 'wb') as f:
                 f.write(_jpeg)
         else:
             return _jpeg
 
-    def open(self, path="mixly.jpg", rotation=0, **kwargs):
+    def open(self, path="mixly.jpg", scale_width=None, scale_height=None, tft_width=240, tft_height=240, **kwargs):
+        '''rotation (0, 90, 180, 270), clipper_width, clipper_height'''
         with open(path, "rb") as f:
             _jpeg = f.read()
-        _decoder = Decoder(pixel_format="RGB565_BE", rotation=rotation, **kwargs)
-        _info = _decoder.get_img_info(_jpeg)
-        _image = IMG(_decoder.decode(_jpeg), _info[0], _info[1])
-        del _decoder
-        return _image
+        return self._jpg_decoder(_jpeg, scale_width, scale_height, tft_width, tft_height, **kwargs)
 
     def convert(self, img, formats=0, **kwargs):
         if formats == 0:
             return self.save(img, None, **kwargs)
         elif formats == 1:
             return b'data:image/jpg;base64,' + b64encode(self.save(img, None, **kwargs))
+
+    def download(self, url, path=None, scale_width=None, scale_height=None, tft_width=240, tft_height=240, block=1024, **kwargs):
+        '''rotation (0, 90, 180, 270), clipper_width, clipper_height'''
+        response = urequests.get(url, stream=True)
+        if path is None:
+            _image = self._jpg_decoder(response.raw.read(), scale_width, scale_height, tft_width, tft_height, **kwargs)
+            response.close()
+            return _image
+        else:
+            with open(path, 'wb') as f:
+                while True:
+                    _data = response.raw.read(block)
+                    if not _data:
+                        break
+                    else:
+                        f.write(_data)
+            response.close()
+
+    def _jpg_decoder(self, jpg, scale_width, scale_height, tft_width, tft_height, **kwargs):
+        '''Automatically zoom based on the screen'''
+        if scale_width is None or scale_height is None:
+            _width = tft_width
+            _height = tft_height
+            for i in range(min(len(jpg), 1024)):
+                if jpg[i] == 0xFF and (jpg[i + 1] & 0xF0) == 0xC0:
+                    if jpg[i + 1] not in [0xC4, 0xC8, 0xCC]:
+                        _width = jpg[i + 7] << 8 | jpg[i + 8]
+                        _height = jpg[i + 5] << 8| jpg[i + 6]
+                        break
+            if _width > tft_width or _height > tft_height:
+                _scale = max(_width / tft_width, _height / tft_height) * 8
+                _decoder = Decoder(pixel_format="RGB565_BE", scale_width=round(_width / _scale) * 8, scale_height=round(_height / _scale) * 8, **kwargs)
+            else:
+                _decoder = Decoder(pixel_format="RGB565_BE", **kwargs)
+        else:
+            _decoder = Decoder(pixel_format="RGB565_BE", scale_width=scale_width // 8 * 8, scale_height=scale_height // 8 * 8, **kwargs)
+        _info = _decoder.get_img_info(jpg)
+        _image = IMG(_decoder.decode(jpg), _info[0], _info[1])
+        del _decoder, jpg
+        gc.collect()
+        return _image
+
 #图像处理
 Image = Image()