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mesa: call DrawBufferAllocate driver hook in update_framebuffer for windows-system FB

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When draw buffers are changed on a bound framebuffer, DrawBufferAllocate()
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.

Note: This is needed because gallium delays creating the front buffer,
      i965 works fine without this change.

V2 (Timothy Arceri):
 - Rebased on merged/simplified DrawBuffer driver function
 - Move DrawBuffer call outside fb->ColorDrawBuffer[0] !=
   ctx->Color.DrawBuffer[0] check to make piglit pass.

v3 (Timothy Arceri):
 - Call new DrawBuffaerAllocate() driver function.

Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de> (v2)
Reviewed-by: Brian Paul <brianp@vmware.com> (v2)
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99116
This commit is contained in:
Boyan Ding 2018-04-14 14:45:23 +10:00 • committed by Timothy Arceri
parent 6ca09f3a60
commit 6695f9d5c5
1 changed files with 6 additions and 0 deletions
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6
src/mesa/main/framebuffer.c
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@ -617,6 +617,12 @@ update_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
_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.DrawBufferAllocate)
ctx->Driver.DrawBufferAllocate(ctx);
}
}
else {
/* This is a user-created framebuffer.