On 14/04/18 14:45, Timothy Arceri wrote:
From: Boyan Ding <boyan.j.d...@gmail.com>
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.
Note: This seems to be needed because gallium delays creating the front
buffer. i965 works fine without this change.
Meant to add here:
Fixes a number of Wine apps and the following piglit test on gallium:
./bin/glx-multi-context-front
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.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99116
---
src/mesa/main/framebuffer.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/mesa/main/framebuffer.c b/src/mesa/main/framebuffer.c
index 249e775f8cb..81d3b370e73 100644
--- a/src/mesa/main/framebuffer.c
+++ b/src/mesa/main/framebuffer.c
@@ -623,6 +623,12 @@ 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.DrawBuffer)
+ ctx->Driver.DrawBuffer(ctx);
+ }
}
else {
/* This is a user-created framebuffer.
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