python - 屏幕截图()给出:ImportError: cannot import name glReadPixels error in kivy

Question

要在 kivy 中截取窗口的屏幕截图，我们可以按照文档使用 snapshot(name='screenshot{:04d}.png')

http://kivy.org/docs/api-kivy.core.window.html?highlight=screenshot#kivy.core.window.WindowBase.screenshot

但是当我尝试时出现以下错误:

回溯(最近一次调用最后一次): 文件“D:/Paarth/Google_Drive/Google Drive/Codes/Python/Work/kivy/kivyBasics/Screenshots_SaveImage.py”，第 26 行，位于 MyApp().run() 文件“C:\Kivy-1.8.0-py2.7-win32\Python27\lib\kivy\app.py”，第 766 行，运行中 根= self.build() 文件“D:/Paarth/Google_Drive/Google Drive/Codes/Python/Work/kivy/kivyBasics/Screenshots_SaveImage.py”，第 19 行，构建中 Window.screenshot(name='屏幕截图{:04d}.png') 文件“C:\Kivy-1.8.0-py2.7-win32\Python27\lib\kivy\core\window\window_pygame.py”，第 250 行，屏幕截图 从 kivy.core.gl 导入 glReadPixels、GL_RGBA、GL_UNSIGNED_BYTE 导入错误:无法导入名称 glReadPixels

使用的代码:

import  kivy
kivy.require ( '1.8.0 ' )
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.uix.button import Button
from kivy.core.window import WindowBase
from kivy.core.window import Window


class MyWidget(Widget):
    pass

class MyApp(App):
    def build(self):
        parent = MyWidget()

        a = Button(text="hello")
        parent.add_widget(a)
        Window.screenshot(name='screenshot{:04d}.png')

        return parent


if __name__ == '__main__':
    MyApp().run()

Answer 1

为了通过恶劣的方式澄清答案，您需要执行以下操作，并将export_to_png包含在您的python文件中。这个

from kivy.graphics import Canvas, Translate, Fbo, ClearColor, ClearBuffers
kv = '''
cameraWidget:
    orientation: 'vertical'
    Camera:
        id: camera
        resolution: (640, 480)
        play: False
    ToggleButton:
        text: 'Play'
        on_press: camera.play = not camera.play
        size_hint_y: None
        height: '48dp'
    Button:
        text: "Take picture"
        on_press: root.TakePicture()
        height: '48dp'

'''
class cameraWidget(BoxLayout):
    def TakePicture(self, *args):
        self.export_to_png = export_to_png
        self.export_to_png(self.ids.camera, filename='test2.png')

class MyApp(App):
    def build(self):
        return Builder.load_string(kv)

if __name__ == '__main__':
    MyApp().run()