更新：性能优化，文字背景透明功能

Author: funnygeeker

drivers/st7735.py

@@ -142,8 +142,6 @@ def show(self):
         self._write(RAMWR, self.buffer)
 
     @staticmethod
-    def rgb(r, g, b):
-        # return ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3)
-        # return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3)
-        c = (((b & 0xF8) << 8) | ((g & 0xFC) << 3) | (r >> 3)).to_bytes(2, "little")
-        return (c[0] << 8) + c[1]
+    def rgb(r, g, b):  # 感谢 ChatGPT 对代码的性能优化，性能提升 30%
+        c = ((b & 0xF8) << 8) | ((g & 0xFC) << 3) | (r >> 3)
+        return (c >> 8) | ((c & 0xFF) << 8)