The way this would interact with ARB_framebuffer_sRGB is that the EGL's surface EGL_GAMMA attribute would be ignored. If a EGL config has the EGL_GAMMA_SRGB_BIT, it is required to support sRGB for the default OpenGL framebuffer.
On Tue, Sep 25, 2012 at 5:58 PM, John Kåre Alsaker <john.kare.alsa...@gmail.com> wrote: > Hello, > > I would like add support for sRGB framebuffers to EGL. Here are my > proposed changes to EGL: > > A new EGL_SURFACE_TYPE bit: > EGL_GAMMA_SRGB_BIT - This format supports sRGB framebuffers. This also > means that ARB_framebuffer_sRGB is supported for this format. > > New values: > EGL_GAMMA_LINEAR - The gamma is linear. > EGL_GAMMA_SRGB - The gamma is as defined by the sRGB standard. > > New EGL surface attribute: > EGL_GAMMA - The gamma of the surface's framebuffer. The default value > is EGL_GAMMA_LINEAR. > > When the surface's EGL_GAMMA attribute's value is EGL_GAMMA_SRGB and > this is supported by > the format, reads from this framebuffer will be converted from sRGB > gamma and writes will > be converted to sRGB gamma. This may not apply to all functions in the > client API. > > There may be something related to the ARB_framebuffer_sRGB extension > in EGL already, in > which case someone should link me to it. > > There's two assumptions behind this proposal. One is that you won't > support sRGB only > formats. The other is that linear gamma and sRGB gamma format support > is the same. > This means that window systems can't add a new linear gamma format > without adding an sRGB > format and the other way around. > > I'd like some comments on this proposal and tips on how it could be > implemented in the > mess that is DRI. > > Thanks, > John Kåre _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
