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path: root/src/mesa/drivers/dri/nouveau/nv10_state.c
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Diffstat (limited to 'src/mesa/drivers/dri/nouveau/nv10_state.c')
-rw-r--r--src/mesa/drivers/dri/nouveau/nv10_state.c19
1 files changed, 12 insertions, 7 deletions
diff --git a/src/mesa/drivers/dri/nouveau/nv10_state.c b/src/mesa/drivers/dri/nouveau/nv10_state.c
index 09fc07556d..e204eba6ba 100644
--- a/src/mesa/drivers/dri/nouveau/nv10_state.c
+++ b/src/mesa/drivers/dri/nouveau/nv10_state.c
@@ -41,13 +41,18 @@ static void nv10ViewportScale(nouveauContextPtr nmesa)
GLuint h = ctx->Viewport.Height;
GLfloat max_depth = (ctx->Viewport.Near + ctx->Viewport.Far) * 0.5;
- switch (ctx->DrawBuffer->_DepthBuffer->DepthBits) {
- case 16:
- max_depth *= 32767.0;
- break;
- case 24:
- max_depth *= 16777215.0;
- break;
+ if (ctx->DrawBuffer) {
+ switch (ctx->DrawBuffer->_DepthBuffer->DepthBits) {
+ case 16:
+ max_depth *= 32767.0;
+ break;
+ case 24:
+ max_depth *= 16777215.0;
+ break;
+ }
+ } else {
+ /* Default to 24 bits range */
+ max_depth *= 16777215.0;
}
BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_VIEWPORT_SCALE_X, 4);