Thank you Brian for the clarification, I have looked at your past project and will go this way
-- Philippe On 23 September 2016 at 18:07:39, Brian Paul (bri...@vmware.com) wrote: On 09/23/2016 08:08 AM, Phaedra Narayna wrote: > Hi, > > I have a OSMesa bug when trying to create a virtual window that is more > than 16384 pixel in height , see below : > > *Command:* > #headless_shell --screenshot --window-size="1920x16385" > --hide-scrollbars --no-sandbox http://linuxfr.org > *Error Msg:* > [0920/154515:ERROR:gl_context_osmesa.cc(72)] OSMesaMakeCurrent failed. > [0920/154515:ERROR:gles2_cmd_decoder.cc(4992)] GLES2DecoderImpl: Context > lost because context no longer current after resize callback. > [0920/154515:ERROR:gles2_cmd_decoder.cc(5108)] Error: 5 for Command > kResizeCHROMIUM > [0920/154515:ERROR:gl_context_osmesa.cc(72)] OSMesaMakeCurrent failed. > > I am using OSMesa on Archlinux : > https://www.archlinux.org/packages/extra/i686/mesa/ , mesa 12.0.3-1 as > this time of writing. > > I have checked with the HeadLess Chromium project as per this thread: > https://groups.google.com/a/chromium.org/forum/#!topic/headless-dev/t0ixeHXCzK0 > > I have checked with the Skia project as per this thread : > https://bugs.chromium.org/p/skia/issues/detail?id=580&can=2&start=0&num=100&q=label%3AHotlist-Fixit&colspec=ID%20Type%20Status%20Priority%20M%20Area%20Owner%20Summary&groupby=&sort= > > > Any idea on how to solve this problem? There's always a limit on max surface/rendering size because of rasterization and interpolation limitations. I don't know which driver you're using, but if you query the GL_MAX_FRAMEBUFFER_WIDTH and GL_MAX_FRAMEBUFFER_HEIGHT you can find the limits. If you need to render a larger image, you'll probably have to break up the image into tiles which are rendered individually. Here's an old project of mine that might help: http://www.mesa3d.org/brianp/TR.html -Brian
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