On 08/06/18 09:00, Paul St George wrote:
Excellent. Now I know what to do in this instance and I understand
the principle.
I hesitantly tried this:
screen = pygame.display.set_mode((720,480), pygame.FULLSCREEN |
pygame.DOUBLEBUF)
Hesitantly because I expected the *bitwise or operator* (|) to work
like a toggle, so FULLSCREEN or DOUBLEBUF.
On 08/06/2018 12:52, Rhodri James wrote:
The bitwise OR operator peforms a bitwise OR, i.e. *both* flags get set.
No errors were reported, but how would I check that DOUBLEBUF had
been set? Is there a general rule, such as replace 'set_something'
with 'get_something'?
There's documentation. The link Chris gave you for
pygame.display.set_mode() tells you that you get a Surface out of it.
Reaching for the docs for that, this leaps out:
https://www.pygame.org/docs/ref/surface.html#pygame.Surface.get_flags
So...
print pygame.display.get_surface()
gives
<Surface(720x480x32 SW)>
and
print screen.get_flags()
gives
-2147483648
The lists of flags at
<https://www.pygame.org/docs/ref/surface.html#pygame.Surface.get_flags>
and <http://www.rpi.edu/dept/acm/packages/SDL/1.2.6/include/SDL/SDL_video.h>
has nothing remotely like -2147483648. I would expect something more
like 0x40000000
Am I using the wrong code to determine whether I have successfully set
DOUBLEBUF with
screen = pygame.display.set_mode((720,480), pygame.FULLSCREEN |
pygame.DOUBLEBUF)
AND
What does -2147483648 tell me? Does this number need converting?
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