[Mesa-stable] [Mesa-dev] [PATCH] mesa: call DrawBuffer(s) driver hook in update_framebuffer for windows-system FB

[Manolova, Plamena]

This looks good to me :)
Reviewed-by: Plamena Manolova <plamena.manolova at intel.com>

On Fri, Jan 20, 2017 at 9:38 AM, Boyan Ding <boyan.j.ding at gmail.com> wrote:

> When draw buffers are changed on a bound framebuffer, DrawBuffer(s) hook
> should be called. However, it is missing in update_framebuffer with
> window-system framebuffer, in which FB's draw buffer state should match
> context state, potentially resulting in a change.
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99116
> Signed-off-by: Boyan Ding <boyan.j.ding at gmail.com>
> ---
>  src/mesa/main/framebuffer.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/src/mesa/main/framebuffer.c b/src/mesa/main/framebuffer.c
> index c06130dc8d..55a6d5c004 100644
> --- a/src/mesa/main/framebuffer.c
> +++ b/src/mesa/main/framebuffer.c
> @@ -670,6 +670,16 @@ update_framebuffer(struct gl_context *ctx, struct
> gl_framebuffer *fb)
>        if (fb->ColorDrawBuffer[0] != ctx->Color.DrawBuffer[0]) {
>           _mesa_drawbuffers(ctx, fb, ctx->Const.MaxDrawBuffers,
>                             ctx->Color.DrawBuffer, NULL);
> +
> +         /* Call device driver function if fb is the bound draw buffer. */
> +         if (fb == ctx->DrawBuffer) {
> +            if (ctx->Driver.DrawBuffers) {
> +               ctx->Driver.DrawBuffers(ctx, ctx->Const.MaxDrawBuffers,
> +                                      ctx->Color.DrawBuffer);
> +            } else if (ctx->Driver.DrawBuffer) {
> +               ctx->Driver.DrawBuffer(ctx, ctx->Color.DrawBuffer[0]);
> +            }
> +         }
>        }
>     }
>     else {
> --
> 2.11.0
>
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