AFAIK this was the pre-framebuffer-object / OES_surfaceless_context way of making a context current without (really) having a bound surface. That said I don't think Mesa actually implements that feature correctly, atm I think you'll get a BadValue from the xcb_create_pixmap call, but patches to fix that would be welcome.
- ajax On Mon, Jul 18, 2022 at 10:28 PM Lin, Shuicheng <shuicheng....@intel.com> wrote: > Hi, > > In spec, eglCreatePbufferSurface is allowed to be called with attrib_list > is NULL or empty, which means EGL_WIDTH/EGL_HEIGHT for the surface is 0. > > And in mesa code, specific to android path, I cannot find the width/height > could be updated to a normal value. > > Also the eglMakeCurrent call after the eglCreatePbufferSurface, will use > the 0 width/height to allocate buffer, which seems un-reasonable. > > Could you share me why 0 is allowed for width/height, and how app will use > the PbufferSurface later? > > Thanks. > > > > Best Regards > > Shuicheng > > >
