added some missing error checks

1 files changed, 6 insertions, 1 deletions

diff --git a/src/mesa/swrast/s_drawpix.c b/src/mesa/swrast/s_drawpix.c
index b3a4a7886df..dfe71668802 100644
--- a/src/mesa/swrast/s_drawpix.c
+++ b/src/mesa/swrast/s_drawpix.c
@@ -1,4 +1,4 @@
-/* $Id: s_drawpix.c,v 1.24 2002/01/10 16:54:29 brianp Exp $ */
+/* $Id: s_drawpix.c,v 1.25 2002/01/15 21:49:58 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -560,6 +560,11 @@ draw_stencil_pixels( GLcontext *ctx, GLint x, GLint y,
       return;
    }
 
+   if (ctx->Visual.stencilBits == 0) {
+      _mesa_error( ctx, GL_INVALID_OPERATION, "glDrawPixels(no stencil buffer)");
+      return;
+   }
+
    drawWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width;
 
    for (row = 0; row < height; row++, y++) {