how self.camera.pixel_array gets updated with the next frame during the rendering process.

[tianmaoyu]

(Regarding a source code question): I would like to know how Cairo exports images within Manim.

I know that the image is initially generated based on self.camera.pixel_array, but I am unsure where self.camera.pixel_array gets updated after rendering with Cairo.

When does the self.camera.pixel_array get updated with the rendered image when using Cairo for rendering? Below are some locations where I've found the setting of pixel_array, however, I'm still unable to find how self.camera.pixel_array gets updated with the next frame during the rendering process.

[tianmaoyu]

When performing various Cairo drawing operations, the data in the pixel_array will also be updated, as they share this data.

  surface = cairo.ImageSurface.create_for_data(
            pixel_array,
            cairo.FORMAT_ARGB32,
            pw,
            ph,
        )