Re: opengl: Sync a dibsection to its pixmap before drawing to it via opengl

[Alexandre Julliard]

Huw D M Davies  writes:
> +void enter_gl(void)
> +{
> - GLXContext gl_ctx;
> - Wine_GLContext *ctx;
> - enum x11drv_escape_codes escape = X11DRV_SYNC_PIXMAP;
> -
> - wine_tsx11_lock_ptr(); /* unlock in LEAVE_GL */
> - gl_ctx = glXGetCurrentContext();
> - if(!gl_ctx) return;
> - ctx = get_context_from_GLXContext(gl_ctx);
> - if(!ctx || GetObjectType(ctx->hdc) == OBJ_DC)
> -
>    return;
> -
> - ExtEscape(ctx->hdc, X11DRV_ESCAPE, sizeof(escape), (LPCSTR)&escape, 0, NULL);

You cannot make GDI calls while holding the X11 lock, this will
deadlock.