Mesa (master): i965: Set correct values for range/ precision of fragment shader types

[Ian Romanick]

Module: Mesa
Branch: master
Commit: 3d028024e581b05f71f0be915657c2c105885de6
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3d028024e581b05f71f0be915657c2c105885de6

Author: Ian Romanick <ian.d.romanick at intel.com>
Date:   Thu Jan 20 12:07:21 2011 -0800

i965: Set correct values for range/precision of fragment shader types

---

 src/mesa/drivers/dri/i965/brw_context.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 8fc322f..d3b61ab 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -151,6 +151,15 @@ GLboolean brwCreateContext( int api,
       MIN2(ctx->Const.FragmentProgram.MaxNativeParameters,
 	   ctx->Const.FragmentProgram.MaxEnvParams);
 
+   /* Fragment shaders use real, 32-bit twos-complement integers for all
+    * integer types.
+    */
+   ctx->FragmentProgram.LowInt.RangeMin = 31;
+   ctx->FragmentProgram.LowInt.RangeMax = 30;
+   ctx->FragmentProgram.LowInt.Precision = 0;
+   ctx->FragmentProgram.HighInt = ctx->FragmentProgram.MediumInt
+      = ctx->FragmentProgram.LowInt;
+
    /* Gen6 converts quads to polygon in beginning of 3D pipeline,
       but we're not sure how it's actually done for vertex order,
       that affect provoking vertex decision. Always use last vertex