Cogl.Framebuffer.prototype.read_pixels_into_bitmap

function read_pixels_into_bitmap(x: Number(gint), y: Number(gint), source: Cogl.ReadPixelsFlags, bitmap: Cogl.Bitmap): Cogl.Bool {
    // Gjs wrapper for cogl_framebuffer_read_pixels_into_bitmap()
}
  

This reads a rectangle of pixels from the given framebuffer where position (0, 0) is the top left. The pixel at (x, y) is the first read, and a rectangle of pixels with the same size as the bitmap is read right and downwards from that point.

Currently Cogl assumes that the framebuffer is in a premultiplied format so if the format of bitmap is non-premultiplied it will convert it. To read the pixel values without any conversion you should either specify a format that doesn't use an alpha channel or use one of the formats ending in PRE.

Since 1.10