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Added faster cairo_fixed_from_double()

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git-svn-id: https://svn.o-hand.com/repos/poky/trunk@638 311d38ba-8fff-0310-9ca6-ca027cbcb966
This commit is contained in:
Jorn Baayen
2006-08-25 10:14:14 +00:00
parent ad1b593155
commit 55b765064d
2 changed files with 45 additions and 1 deletions
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3
meta/packages/cairo/cairo_1.2.0.bb → meta/packages/cairo/cairo_1.2.4.bb
View File

@@ -6,7 +6,8 @@ DESCRIPTION = "Cairo graphics library"
LICENSE = "MPL LGPL" LICENSE = "MPL LGPL"
PR = "r1" PR = "r1"
SRC_URI = "http://cairographics.org/releases/cairo-${PV}.tar.gz" SRC_URI = "http://cairographics.org/releases/cairo-${PV}.tar.gz \
file://cairo-fixed.patch;patch=1"
inherit autotools pkgconfig inherit autotools pkgconfig

43
meta/packages/cairo/files/cairo-fixed.patch Normal file
View File

@@ -0,0 +1,43 @@
diff -ur cairo-1.2.4/src/cairo-fixed.c cairo-1.2.4-new/src/cairo-fixed.c
--- cairo-1.2.4/src/cairo-fixed.c 2006-06-10 07:07:37.000000000 +0300
+++ cairo-1.2.4-new/src/cairo-fixed.c 2006-08-25 13:06:26.000000000 +0300
@@ -43,12 +43,6 @@
}
cairo_fixed_t
-_cairo_fixed_from_double (double d)
-{
- return (cairo_fixed_t) floor (d * 65536 + 0.5);
-}
-
-cairo_fixed_t
_cairo_fixed_from_26_6 (uint32_t i)
{
return i << 10;
diff -ur cairo-1.2.4/src/cairoint.h cairo-1.2.4-new/src/cairoint.h
--- cairo-1.2.4/src/cairoint.h 2006-08-18 17:20:16.000000000 +0300
+++ cairo-1.2.4-new/src/cairoint.h 2006-08-25 13:14:07.000000000 +0300
@@ -1117,8 +1117,21 @@
#define CAIRO_FIXED_ONE _cairo_fixed_from_int (1)
-cairo_private cairo_fixed_t
-_cairo_fixed_from_double (double d);
+#define CAIRO_DOUBLE2FIX_MAGIC 103079215104.0 /* 2 ^ (52 - 16) * 1.5 */
+
+#ifdef WORDS_BIGENDIAN
+#define iman 1
+#else
+#define iman 0
+#endif
+
+static inline cairo_fixed_t
+_cairo_fixed_from_double (double d)
+{
+ d = d + CAIRO_DOUBLE2FIX_MAGIC;
+
+ return ((cairo_fixed_t *) &d)[iman];
+}
cairo_private cairo_fixed_t
_cairo_fixed_from_26_6 (uint32_t i);