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-rw-r--r--src/mesa/drivers/dri/nouveau/nv10_state.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/src/mesa/drivers/dri/nouveau/nv10_state.c b/src/mesa/drivers/dri/nouveau/nv10_state.c
index e64fcb12f56..803dd962b59 100644
--- a/src/mesa/drivers/dri/nouveau/nv10_state.c
+++ b/src/mesa/drivers/dri/nouveau/nv10_state.c
@@ -187,9 +187,15 @@ static void nv10DepthMask(GLcontext *ctx, GLboolean flag)
static void nv10DepthRange(GLcontext *ctx, GLclampd nearval, GLclampd farval)
{
nouveauContextPtr nmesa = NOUVEAU_CONTEXT(ctx);
+
+ GLfloat depth_scale = 16777216.0;
+ if (ctx->DrawBuffer->_DepthBuffer->DepthBits == 16) {
+ depth_scale = 32768.0;
+ }
+
BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_DEPTH_RANGE_NEAR, 2);
- OUT_RING_CACHEf(nearval);
- OUT_RING_CACHEf(farval);
+ OUT_RING_CACHEf(nearval * depth_scale);
+ OUT_RING_CACHEf(farval * depth_scale);
nv10ViewportScale(nmesa);
}