Re: [pygame] PyOpenGL Screenshots

["René Dudfield" <renesd@xxxxxxxxx>]

looks like pyopengl 3.x returns a numpy array now instead of a string
by default... which breaks pygame.image.save on gl with pyopengl 3.x.

Here's a work around screenshot function for gl.


def save_screen(screen, filename):

    def readScreen(x, y, width, height):
        """ Read in the screen information in the area specified """
        glFinish()
        glPixelStorei(GL_PACK_ALIGNMENT, 4)
        glPixelStorei(GL_PACK_ROW_LENGTH, 0)
        glPixelStorei(GL_PACK_SKIP_ROWS, 0)
        glPixelStorei(GL_PACK_SKIP_PIXELS, 0)

        data = glReadPixels(x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE)
        if hasattr(data, "tostring"):
            data = data.tostring()

        return data
    def saveImageData(width, height, data, filename):
        """ Save image data """
        surface = pygame.image.fromstring(data, (width, height), 'RGB', 1)
        pygame.image.save(surface, filename)

    data = readScreen(0,0, screen.get_width(), screen.get_height())
    saveImageData(screen.get_width(), screen.get_height(), data, filename)



On Wed, May 7, 2008 at 2:27 PM, René Dudfield <renesd@xxxxxxxxx> wrote:
> hi,
>
>  glReadPixels, make a surface, then use pygame.image.save()
>
>  Then use ffmpeg, or vlc etc to make a movie out of still frames.
>
>  cheers,
>