diff options
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_math.c')
-rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_math.c | 146 |
1 files changed, 73 insertions, 73 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_math.c b/mesalib/src/gallium/auxiliary/util/u_math.c index 3044f5da8..2811475fa 100644 --- a/mesalib/src/gallium/auxiliary/util/u_math.c +++ b/mesalib/src/gallium/auxiliary/util/u_math.c @@ -1,73 +1,73 @@ -/**************************************************************************
- *
- * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sub license, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
- * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- **************************************************************************/
-
-
-
-#include "util/u_math.h"
-
-
-/** 2^x, for x in [-1.0, 1.0) */
-float pow2_table[POW2_TABLE_SIZE];
-
-
-static void
-init_pow2_table(void)
-{
- int i;
- for (i = 0; i < POW2_TABLE_SIZE; i++)
- pow2_table[i] = (float) pow(2.0, (i - POW2_TABLE_OFFSET) / POW2_TABLE_SCALE);
-}
-
-
-/** log2(x), for x in [1.0, 2.0) */
-float log2_table[LOG2_TABLE_SIZE];
-
-
-static void
-init_log2_table(void)
-{
- unsigned i;
- for (i = 0; i < LOG2_TABLE_SIZE; i++)
- log2_table[i] = (float) log2(1.0 + i * (1.0 / LOG2_TABLE_SCALE));
-}
-
-
-/**
- * One time init for math utilities.
- */
-void
-util_init_math(void)
-{
- static boolean initialized = FALSE;
- if (!initialized) {
- init_pow2_table();
- init_log2_table();
- initialized = TRUE;
- }
-}
-
-
+/************************************************************************** + * + * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + + + +#include "util/u_math.h" + + +/** 2^x, for x in [-1.0, 1.0) */ +float pow2_table[POW2_TABLE_SIZE]; + + +static void +init_pow2_table(void) +{ + int i; + for (i = 0; i < POW2_TABLE_SIZE; i++) + pow2_table[i] = (float) pow(2.0, (i - POW2_TABLE_OFFSET) / POW2_TABLE_SCALE); +} + + +/** log2(x), for x in [1.0, 2.0) */ +float log2_table[LOG2_TABLE_SIZE]; + + +static void +init_log2_table(void) +{ + unsigned i; + for (i = 0; i < LOG2_TABLE_SIZE; i++) + log2_table[i] = (float) log2(1.0 + i * (1.0 / LOG2_TABLE_SCALE)); +} + + +/** + * One time init for math utilities. + */ +void +util_init_math(void) +{ + static boolean initialized = FALSE; + if (!initialized) { + init_pow2_table(); + init_log2_table(); + initialized = TRUE; + } +} + + |