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'''
Common tools for drawing compatible frames in a Component's frameRender()
'''
from PyQt5 import QtGui
from PIL import Image
from PIL.ImageQt import ImageQt
import sys
class FramePainter(QtGui.QPainter):
'''
A QPainter for a blank frame, which can be converted into a
Pillow image with finalize()
'''
def __init__(self, width, height):
image = BlankFrame(width, height)
self.image = ImageQt(image)
super().__init__(self.image)
def setPen(self, RgbTuple):
super().setPen(PaintColor(*RgbTuple))
def finalize(self):
self.end()
imBytes = self.image.bits().asstring(self.image.byteCount())
return Image.frombytes(
'RGBA', (self.image.width(), self.image.height()), imBytes
)
class PaintColor(QtGui.QColor):
'''Reverse the painter colour if the hardware stores RGB values backward'''
def __init__(self, r, g, b, a=255):
if sys.byteorder == 'big':
super().__init__(r, g, b, a)
else:
super().__init__(b, g, r, a)
def FloodFrame(width, height, RgbaTuple):
return Image.new("RGBA", (width, height), RgbaTuple)
def BlankFrame(width, height):
'''The base frame used by each component to start drawing'''
return FloodFrame(width, height, (0, 0, 0, 0))
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