From: Patrice Mandin <pmandin@caramail.com>
Date: Fri, 16 Feb 2007 18:54:55 +0000 (+0100)
Subject: nouveau: nv10: rescale depth near and far
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9131536f00cca586be7dfc1cfbc47188c78e4920;p=mesa.git

nouveau: nv10: rescale depth near and far
---

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);
 }