[Wayland-bugs] [Bug 46451] screenshot doesn't work on weston in drm backend

[Scott Moreau]

>
> --- Comment #3 from ZhaoShengyan <shengyanx.zhao at intel.com> 2012-04-18
> 22:01:10 PDT ---
> It can't be reproduced with:
>

Did you mean "can" be reproduced with?


>
> Arch: i386
> Libdrm: (master) 2.4.33-12-g292da616fe1f936ca78a3fa8e1b1b19883e343b6
> Wayland: (master)677c5180e67be18b7a0867fafb7f205b57a6e9ff
> Mesa: (master)35f2fb70d3826df70fa2f53af05339137cddefc8
> Xserver:
> (master)xorg-server-1.12.0-66-g80fefc42f5e67e6b4a4b440d8991bee7e5f38359
> Xf86_video_intel:
> (master)2.18.0-212-gaf4a6e8cb52ace594934446e6d8a7aaa1945a9b0
> Cairo: (master)4f125a1bd069095f3a97f009e7d7af2681353fb1
> Cairo_gl: (master)4f125a1bd069095f3a97f009e7d7af2681353fb1
> Xkbcommon: (master)3d672fcfea6b823db4793b9ad1c3aadc4b547a08
> Weston: (master)e4faa2ab051aca454f3952f458dac42491e54954
> Kernel_unstable:
> (drm-intel-next-queued)fc6826d1dcd65f3d1e9a5377678882e4e08f02be
>
>
The reason screenshot is buggy is because it shoots the back buffer at a
time when it's contents
are not guaranteed. It needs a bit of rework to read the pixels at the
right time - after the scene
is rendered to the back buffer, right before swapping buffers.
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