remove DitherValues

[mesa.git] / src / mesa / drivers / x11 / xm_line.c

diff --git a/src/mesa/drivers/x11/xm_line.c b/src/mesa/drivers/x11/xm_line.c
index 342528dbefa74186dc9f152c217ed8f2f88e56dc..a5352d614747883828dc1fd861565cacd8f5eec1 100644 (file)
--- a/src/mesa/drivers/x11/xm_line.c
+++ b/src/mesa/drivers/x11/xm_line.c
@@ -492,6 +492,8 @@ static swrast_line_func get_line_func( GLcontext *ctx )
    SWcontext *swrast = SWRAST_CONTEXT(ctx);
    int depth = GET_VISUAL_DEPTH(xmesa->xm_visual);
 
+   if ((ctx->Color._DrawDestMask & (DD_FRONT_LEFT_BIT | DD_BACK_LEFT_BIT)) ==0)
+      return (swrast_line_func) NULL;
    if (ctx->RenderMode != GL_RENDER)      return (swrast_line_func) NULL;
    if (ctx->Line.SmoothFlag)              return (swrast_line_func) NULL;
    if (ctx->Texture._EnabledUnits)        return (swrast_line_func) NULL;