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

[Alexandre Julliard]

Huw D M Davies <h.davies1 at physics.ox.ac.uk> 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.

-- 
Alexandre Julliard
julliard at winehq.org