[PATCH 4/5] winex11: Restore the X11DRV_FLUSH_GL_DRAWABLE XFlush() for setups without OML_sync_control.

[Henri Verbeet]

This was removed in e75bc6228ebcbdc1a3877a6ac6954611dedf8a71, but appears to
mitigate lack of OML_sync_control in at least some setups.

Signed-off-by: Henri Verbeet <hverbeet(a)codeweavers.com>
---
 dlls/winex11.drv/init.c   | 1 +
 dlls/winex11.drv/opengl.c | 3 +++
 dlls/winex11.drv/x11drv.h | 1 +
 3 files changed, 5 insertions(+)

diff --git a/dlls/winex11.drv/init.c b/dlls/winex11.drv/init.c
index be5537127a2..fc7972c62fe 100644
--- a/dlls/winex11.drv/init.c
+++ b/dlls/winex11.drv/init.c
@@ -259,6 +259,7 @@ static INT X11DRV_ExtEscape( PHYSDEV dev, INT escape, INT in_count, LPCVOID in_d
                     RECT rect = physDev->dc_rect;
 
                     OffsetRect( &rect, -physDev->dc_rect.left, -physDev->dc_rect.top );
+                    if (data->flush) XFlush( gdi_display );
                     XSetFunction( gdi_display, physDev->gc, GXcopy );
                     XCopyArea( gdi_display, data->gl_drawable, physDev->drawable, physDev->gc,
                                0, 0, rect.right, rect.bottom,
diff --git a/dlls/winex11.drv/opengl.c b/dlls/winex11.drv/opengl.c
index 01b92e3a099..7aa6448fedb 100644
--- a/dlls/winex11.drv/opengl.c
+++ b/dlls/winex11.drv/opengl.c
@@ -1976,6 +1976,7 @@ static void wglFinish(void)
 
     escape.code = X11DRV_FLUSH_GL_DRAWABLE;
     escape.gl_drawable = 0;
+    escape.flush = FALSE;
 
     if ((gl = get_gl_drawable( WindowFromDC( ctx->hdc ), 0 )))
     {
@@ -2001,6 +2002,7 @@ static void wglFlush(void)
 
     escape.code = X11DRV_FLUSH_GL_DRAWABLE;
     escape.gl_drawable = 0;
+    escape.flush = FALSE;
 
     if ((gl = get_gl_drawable( WindowFromDC( ctx->hdc ), 0 )))
     {
@@ -3286,6 +3288,7 @@ static BOOL glxdrv_wglSwapBuffers( HDC hdc )
 
     escape.code = X11DRV_FLUSH_GL_DRAWABLE;
     escape.gl_drawable = 0;
+    escape.flush = !pglXWaitForSbcOML;
 
     if (!(gl = get_gl_drawable( WindowFromDC( hdc ), hdc )))
     {
diff --git a/dlls/winex11.drv/x11drv.h b/dlls/winex11.drv/x11drv.h
index abd069e1b42..6781d6073a7 100644
--- a/dlls/winex11.drv/x11drv.h
+++ b/dlls/winex11.drv/x11drv.h
@@ -304,6 +304,7 @@ struct x11drv_escape_flush_gl_drawable
 {
     enum x11drv_escape_codes code;         /* escape code (X11DRV_FLUSH_GL_DRAWABLE) */
     Drawable                 gl_drawable;  /* GL drawable */
+    BOOL                     flush;        /* flush X11 before copying */
 };
 
 /**************************************************************************
-- 
2.11.0