[Mesa-stable] [PATCH 3/4] egl_dri2: set correct error code if swapbuffers fails

[Tapani Pälli]

On 02/12/2016 02:13 AM, Emil Velikov wrote:
> On 11 February 2016 at 12:03, Tapani Pälli <tapani.palli at intel.com> wrote:
>> From: Daniel Czarnowski <daniel.czarnowski at intel.com>
>>
>> Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
>> Cc: "11.0 11.1" <mesa-stable at lists.freedesktop.org
>> ---
>>   src/egl/drivers/dri2/platform_x11.c | 6 +++++-
>>   1 file changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/src/egl/drivers/dri2/platform_x11.c b/src/egl/drivers/dri2/platform_x11.c
>> index 931ee51..7a26c38 100644
>> --- a/src/egl/drivers/dri2/platform_x11.c
>> +++ b/src/egl/drivers/dri2/platform_x11.c
>> @@ -872,7 +872,11 @@ dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
>>      struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
>>
>>      if (dri2_dpy->dri2) {
>> -      return dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1;
>> +      if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) != -1)
>> +          return EGL_TRUE;
>> +      /* Swap failed with a window drawable. */
>> +      _eglError(EGL_BAD_NATIVE_WINDOW, __FUNCTION__);
>> +      return EGL_FALSE;
> Looking at the implementation of dri2_x11_swap_buffers_msc() and I'm
> wondering if failing xcb_dri2_swap_buffers_reply() really means
> "failed with window drawable". Can you please elaborate a bit and
> stick it in the commit message ?
>

I can add here something like "A return value of '-1' means that there 
was error during swap with a window drawable"? It's maybe not obvious as 
dri2_x11_swap_buffers_msc is undocumented but it can be seen by 
inspecting the function.

// Tapani