fontconfig libX11 libxcb libxcb/xcb-proto mesa xserver xkbcomp xkeyboard-config git update 29 Nov 2014

xserver          commit c52a2b1ebad56820af932dfbc871701a8b04fd9c
libxcb           commit bbca7b82f803fa13fd30a2891ec06f2a213a28c2
libxcb/xcb-proto commit 691d2b97e5989d6d7006304d81bd8fa128477ca1
xkeyboard-config commit b664d7fb8aab9b0f834dd9c81d273c7809561b34
libX11           commit f3831dde6972e4da9e018c6a5f4013d8756a5e78
xkbcomp          commit 1e8ee9d0aad072f04186df84752f5636340574e0
fontconfig       commit b732bf057f4b3ec3bac539803005e9c42d056b2a
mesa             commit 67c498086d0858a94d53ebb6921cfda847250368

1 files changed, 31 insertions, 4 deletions

diff --git a/mesalib/src/gallium/auxiliary/util/u_format_pack.py b/mesalib/src/gallium/auxiliary/util/u_format_pack.py
index 6ccf04c29..d5138cc05 100644
--- a/mesalib/src/gallium/auxiliary/util/u_format_pack.py
+++ b/mesalib/src/gallium/auxiliary/util/u_format_pack.py
@@ -207,9 +207,36 @@ def get_one_shift(type):
     assert False
 
 
+def truncate_mantissa(x, bits):
+    '''Truncate an integer so it can be represented exactly with a floating
+    point mantissa'''
+
+    assert isinstance(x, (int, long))
+
+    s = 1
+    if x < 0:
+        s = -1
+        x = -x
+
+    # We can represent integers up to mantissa + 1 bits exactly
+    mask = (1 << (bits + 1)) - 1
+
+    # Slide the mask until the MSB matches
+    shift = 0
+    while (x >> shift) & ~mask:
+        shift += 1
+
+    x &= mask << shift
+    x *= s
+    return x
+
+
 def value_to_native(type, value):
     '''Get the value of unity for this type.'''
     if type.type == FLOAT:
+        if type.size <= 32 \
+            and isinstance(value, (int, long)):
+            return truncate_mantissa(value, 23)
         return value
     if type.type == FIXED:
         return int(value * (1 << (type.size/2)))
@@ -226,9 +253,9 @@ def native_to_constant(type, value):
     '''Get the value of unity for this type.'''
     if type.type == FLOAT:
         if type.size <= 32:
-            return "%ff" % value 
+            return "%.1ff" % float(value)
         else:
-            return "%ff" % value 
+            return "%.1f" % float(value)
     else:
         return str(int(value))
 
@@ -251,8 +278,8 @@ def clamp_expr(src_channel, dst_channel, dst_native_type, value):
     dst_max = dst_channel.max()
     
     # Translate the destination range to the src native value
-    dst_min_native = value_to_native(src_channel, dst_min)
-    dst_max_native = value_to_native(src_channel, dst_max)
+    dst_min_native = native_to_constant(src_channel, value_to_native(src_channel, dst_min))
+    dst_max_native = native_to_constant(src_channel, value_to_native(src_channel, dst_max))
 
     if src_min < dst_min and src_max > dst_max:
         return 'CLAMP(%s, %s, %s)' % (value, dst_min_native, dst_max_native)