From 401eb04e4dfb179291befb19d74e2e3148c4e268 Mon Sep 17 00:00:00 2001
From: marha <marha@users.sourceforge.net>
Date: Fri, 8 Nov 2013 11:09:17 +0100
Subject: libxtrans libxcb xcb-proto mesa git update 8 nov 2013

libxcb           commit e8663a935890ff366f49e356211049dfd0d9756a
libxcb/xcb-proto commit 29beba6bf02bda86a5b163ace63e1d0a4d3eee5b
libxtrans        commit 0153d1670e4a1883e1bb6dd971435d6268eac5ba
mesa             commit 035cce83f7b3d9a037c9e7cc17a212d6cf7e927f
---
 mesalib/src/gallium/auxiliary/util/u_format.c | 16 ++++++----------
 mesalib/src/gallium/auxiliary/util/u_format.h | 18 +++++++++++++++++-
 mesalib/src/gallium/auxiliary/util/u_math.h   | 13 +++++++++++++
 3 files changed, 36 insertions(+), 11 deletions(-)

(limited to 'mesalib/src/gallium/auxiliary')

diff --git a/mesalib/src/gallium/auxiliary/util/u_format.c b/mesalib/src/gallium/auxiliary/util/u_format.c
index 9ef3bb53f..6b602bf32 100644
--- a/mesalib/src/gallium/auxiliary/util/u_format.c
+++ b/mesalib/src/gallium/auxiliary/util/u_format.c
@@ -215,9 +215,8 @@ util_format_is_supported(enum pipe_format format, unsigned bind)
  * default MRD will be 1.0 / ((1 << 24) - 1).
  */
 double
-util_get_depth_format_mrd(enum pipe_format format)
+util_get_depth_format_mrd(const struct util_format_description *desc)
 {
-   struct util_format_description *format_desc;
    /*
     * Depth buffer formats without a depth component OR scenarios
     * without a bound depth buffer default to D24.
@@ -225,23 +224,20 @@ util_get_depth_format_mrd(enum pipe_format format)
    double mrd = 1.0 / ((1 << 24) - 1);
    unsigned depth_channel;
 
-   format_desc = (struct util_format_description *)
-                     util_format_description(format);
-
-   assert(format_desc);
+   assert(desc);
 
    /*
     * Some depth formats do not store the depth component in the first
     * channel, detect the format and adjust the depth channel. Get the
     * swizzled depth component channel.
     */
-   depth_channel = format_desc->swizzle[0];
+   depth_channel = desc->swizzle[0];
 
-   if (format_desc->channel[depth_channel].type == UTIL_FORMAT_TYPE_UNSIGNED &&
-       format_desc->channel[depth_channel].normalized) {
+   if (desc->channel[depth_channel].type == UTIL_FORMAT_TYPE_UNSIGNED &&
+       desc->channel[depth_channel].normalized) {
       int depth_bits;
 
-      depth_bits = format_desc->channel[depth_channel].size;
+      depth_bits = desc->channel[depth_channel].size;
       mrd = 1.0 / ((1ULL << depth_bits) - 1);
    }
 
diff --git a/mesalib/src/gallium/auxiliary/util/u_format.h b/mesalib/src/gallium/auxiliary/util/u_format.h
index 369c3994a..0fbaf4cc1 100644
--- a/mesalib/src/gallium/auxiliary/util/u_format.h
+++ b/mesalib/src/gallium/auxiliary/util/u_format.h
@@ -545,6 +545,22 @@ util_format_is_depth_and_stencil(enum pipe_format format)
 }
 
 
+/**
+ * Calculates the depth format type based upon the incoming format description.
+ */
+static INLINE unsigned
+util_get_depth_format_type(const struct util_format_description *desc)
+{
+   unsigned depth_channel = desc->swizzle[0];
+   if (desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS &&
+       depth_channel != UTIL_FORMAT_SWIZZLE_NONE) {
+      return desc->channel[depth_channel].type;
+   } else {
+      return UTIL_FORMAT_TYPE_VOID;
+   }
+}
+
+
 /**
  * Calculates the MRD for the depth format. MRD is used in depth bias
  * for UNORM and unbound depth buffers. When the depth buffer is floating
@@ -552,7 +568,7 @@ util_format_is_depth_and_stencil(enum pipe_format format)
  * default MRD will be 1.0 / ((1 << 24) - 1).
  */
 double
-util_get_depth_format_mrd(enum pipe_format format);
+util_get_depth_format_mrd(const struct util_format_description *desc);
 
 
 /**
diff --git a/mesalib/src/gallium/auxiliary/util/u_math.h b/mesalib/src/gallium/auxiliary/util/u_math.h
index f5c14ef8d..426d5daa7 100644
--- a/mesalib/src/gallium/auxiliary/util/u_math.h
+++ b/mesalib/src/gallium/auxiliary/util/u_math.h
@@ -245,6 +245,19 @@ union di {
 };
 
 
+/**
+ * Extract the IEEE float32 exponent.
+ */
+static INLINE signed
+util_get_float32_exponent(float x) {
+   union fi f;
+
+   f.f = x;
+
+   return ((f.ui >> 23) & 0xff) - 127;
+}
+
+
 /**
  * Fast version of 2^x
  * Identity: exp2(a + b) = exp2(a) * exp2(b)
-- 
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