add alpha channel

Author: ColleagueRiley

buffer.py

@@ -9,6 +9,7 @@ def drawRect(win, r, color):
 
             for i in range(3):
                 win.buffer[index + i] = color[i]
+            win.buffer[index + 3] = 255;
 
 def main():
     win = RGFW.createWindow("RGFW Example Window", RGFW.rect(500, 500, 500, 500), RGFW.ALLOW_DND | RGFW.CENTER)
@@ -37,4 +38,4 @@ def main():
 
     win.close()
 
-main()
+main()