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-rw-r--r--src/mesa/main/accum.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/src/mesa/main/accum.c b/src/mesa/main/accum.c
index c1346bab4cd..9a32481c931 100644
--- a/src/mesa/main/accum.c
+++ b/src/mesa/main/accum.c
@@ -1,6 +1,6 @@
/*
* Mesa 3-D graphics library
- * Version: 6.3
+ * Version: 6.5
*
* Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
*
@@ -76,6 +76,13 @@ _mesa_Accum( GLenum op, GLfloat value )
return;
}
+ if (ctx->DrawBuffer != ctx->ReadBuffer) {
+ /* See GLX_SGI_make_current_read or WGL_ARB_make_current_read */
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glAccum(different read/draw buffers)");
+ return;
+ }
+
if (ctx->NewState)
_mesa_update_state( ctx );