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    SubjectRe: [Linux-fbdev-devel] Re: [PATCH] fbdev: colormap fixes
    On 7/28/05, Jon Smirl <> wrote:
    > On 7/28/05, Geert Uytterhoeven <> wrote:
    > > On Thu, 28 Jul 2005, Jon Smirl wrote:
    > > > I can't see a way to query how long of cmap the device supports using
    > > > the current fbdev ioctls.
    > >
    > > Look at the lengths of the color bitfields?
    > Which color bitfields? Does hardware that supports 10bit cmap also
    > support a 10:10:10 framebuffer? If you can't do 10:10:10 how do the
    > 10bit cmaps work? Does alpha matter in a 10:10:10 scanout buffer?

    From the OpenGL headers I can see the answer to my questions...
    #define GL_RGB10 0x8052
    #define GL_RGB10_A2 0x8059

    OpenGL supports all of these:
    #define GL_RGB10 0x8052
    #define GL_RGB12 0x8053
    #define GL_RGB16 0x8054
    #define GL_RGB10_A2 0x8059
    #define GL_RGBA12 0x805A
    #define GL_RGBA16 0x805B

    Are there 12 and 16 bit cmaps too?

    Jon Smirl
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      Last update: 2005-07-28 22:29    [W:0.044 / U:0.916 seconds]
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