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-rw-r--r--indra/llmath/llquantize.h310
1 files changed, 158 insertions, 152 deletions
diff --git a/indra/llmath/llquantize.h b/indra/llmath/llquantize.h
index 2192427f07..000d8a060f 100644
--- a/indra/llmath/llquantize.h
+++ b/indra/llmath/llquantize.h
@@ -1,152 +1,158 @@
-/**
- * @file llquantize.h
- * @brief useful routines for quantizing floats to various length ints
- * and back out again
- *
- * $LicenseInfo:firstyear=2001&license=viewergpl$
- *
- * Copyright (c) 2001-2009, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
-
-#ifndef LL_LLQUANTIZE_H
-#define LL_LLQUANTIZE_H
-
-const U16 U16MAX = 65535;
-const F32 OOU16MAX = 1.f/(F32)(U16MAX);
-
-const U8 U8MAX = 255;
-const F32 OOU8MAX = 1.f/(F32)(U8MAX);
-
-const U8 FIRSTVALIDCHAR = 54;
-const U8 MAXSTRINGVAL = U8MAX - FIRSTVALIDCHAR; //we don't allow newline or null
-
-
-inline U16 F32_to_U16_ROUND(F32 val, F32 lower, F32 upper)
-{
- val = llclamp(val, lower, upper);
- // make sure that the value is positive and normalized to <0, 1>
- val -= lower;
- val /= (upper - lower);
-
- // round the value. Sreturn the U16
- return (U16)(llround(val*U16MAX));
-}
-
-
-inline U16 F32_to_U16(F32 val, F32 lower, F32 upper)
-{
- val = llclamp(val, lower, upper);
- // make sure that the value is positive and normalized to <0, 1>
- val -= lower;
- val /= (upper - lower);
-
- // return the U16
- return (U16)(llfloor(val*U16MAX));
-}
-
-inline F32 U16_to_F32(U16 ival, F32 lower, F32 upper)
-{
- F32 val = ival*OOU16MAX;
- F32 delta = (upper - lower);
- val *= delta;
- val += lower;
-
- F32 max_error = delta*OOU16MAX;
-
- // make sure that zero's come through as zero
- if (fabsf(val) < max_error)
- val = 0.f;
-
- return val;
-}
-
-
-inline U8 F32_to_U8_ROUND(F32 val, F32 lower, F32 upper)
-{
- val = llclamp(val, lower, upper);
- // make sure that the value is positive and normalized to <0, 1>
- val -= lower;
- val /= (upper - lower);
-
- // return the rounded U8
- return (U8)(llround(val*U8MAX));
-}
-
-
-inline U8 F32_to_U8(F32 val, F32 lower, F32 upper)
-{
- val = llclamp(val, lower, upper);
- // make sure that the value is positive and normalized to <0, 1>
- val -= lower;
- val /= (upper - lower);
-
- // return the U8
- return (U8)(llfloor(val*U8MAX));
-}
-
-inline F32 U8_to_F32(U8 ival, F32 lower, F32 upper)
-{
- F32 val = ival*OOU8MAX;
- F32 delta = (upper - lower);
- val *= delta;
- val += lower;
-
- F32 max_error = delta*OOU8MAX;
-
- // make sure that zero's come through as zero
- if (fabsf(val) < max_error)
- val = 0.f;
-
- return val;
-}
-
-inline U8 F32_TO_STRING(F32 val, F32 lower, F32 upper)
-{
- val = llclamp(val, lower, upper); //[lower, upper]
- // make sure that the value is positive and normalized to <0, 1>
- val -= lower; //[0, upper-lower]
- val /= (upper - lower); //[0,1]
- val = val * MAXSTRINGVAL; //[0, MAXSTRINGVAL]
- val = floor(val + 0.5f); //[0, MAXSTRINGVAL]
-
- U8 stringVal = (U8)(val) + FIRSTVALIDCHAR; //[FIRSTVALIDCHAR, MAXSTRINGVAL + FIRSTVALIDCHAR]
- return stringVal;
-}
-
-inline F32 STRING_TO_F32(U8 ival, F32 lower, F32 upper)
-{
- // remove empty space left for NULL, newline, etc.
- ival -= FIRSTVALIDCHAR; //[0, MAXSTRINGVAL]
-
- F32 val = (F32)ival * (1.f / (F32)MAXSTRINGVAL); //[0, 1]
- F32 delta = (upper - lower);
- val *= delta; //[0, upper - lower]
- val += lower; //[lower, upper]
-
- return val;
-}
-
-#endif
+/**
+ * @file llquantize.h
+ * @brief useful routines for quantizing floats to various length ints
+ * and back out again
+ *
+ * $LicenseInfo:firstyear=2001&license=viewergpl$
+ *
+ * Copyright (c) 2001-2009, Linden Research, Inc.
+ *
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab. Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ *
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ *
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ *
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLQUANTIZE_H
+#define LL_LLQUANTIZE_H
+
+const U16 U16MAX = 65535;
+LL_ALIGN_16( const F32 F_U16MAX_4A[4] ) = { 65535.f, 65535.f, 65535.f, 65535.f };
+
+const F32 OOU16MAX = 1.f/(F32)(U16MAX);
+LL_ALIGN_16( const F32 F_OOU16MAX_4A[4] ) = { OOU16MAX, OOU16MAX, OOU16MAX, OOU16MAX };
+
+const U8 U8MAX = 255;
+LL_ALIGN_16( const F32 F_U8MAX_4A[4] ) = { 255.f, 255.f, 255.f, 255.f };
+
+const F32 OOU8MAX = 1.f/(F32)(U8MAX);
+LL_ALIGN_16( const F32 F_OOU8MAX_4A[4] ) = { OOU8MAX, OOU8MAX, OOU8MAX, OOU8MAX };
+
+const U8 FIRSTVALIDCHAR = 54;
+const U8 MAXSTRINGVAL = U8MAX - FIRSTVALIDCHAR; //we don't allow newline or null
+
+
+inline U16 F32_to_U16_ROUND(F32 val, F32 lower, F32 upper)
+{
+ val = llclamp(val, lower, upper);
+ // make sure that the value is positive and normalized to <0, 1>
+ val -= lower;
+ val /= (upper - lower);
+
+ // round the value. Sreturn the U16
+ return (U16)(llround(val*U16MAX));
+}
+
+
+inline U16 F32_to_U16(F32 val, F32 lower, F32 upper)
+{
+ val = llclamp(val, lower, upper);
+ // make sure that the value is positive and normalized to <0, 1>
+ val -= lower;
+ val /= (upper - lower);
+
+ // return the U16
+ return (U16)(llfloor(val*U16MAX));
+}
+
+inline F32 U16_to_F32(U16 ival, F32 lower, F32 upper)
+{
+ F32 val = ival*OOU16MAX;
+ F32 delta = (upper - lower);
+ val *= delta;
+ val += lower;
+
+ F32 max_error = delta*OOU16MAX;
+
+ // make sure that zero's come through as zero
+ if (fabsf(val) < max_error)
+ val = 0.f;
+
+ return val;
+}
+
+
+inline U8 F32_to_U8_ROUND(F32 val, F32 lower, F32 upper)
+{
+ val = llclamp(val, lower, upper);
+ // make sure that the value is positive and normalized to <0, 1>
+ val -= lower;
+ val /= (upper - lower);
+
+ // return the rounded U8
+ return (U8)(llround(val*U8MAX));
+}
+
+
+inline U8 F32_to_U8(F32 val, F32 lower, F32 upper)
+{
+ val = llclamp(val, lower, upper);
+ // make sure that the value is positive and normalized to <0, 1>
+ val -= lower;
+ val /= (upper - lower);
+
+ // return the U8
+ return (U8)(llfloor(val*U8MAX));
+}
+
+inline F32 U8_to_F32(U8 ival, F32 lower, F32 upper)
+{
+ F32 val = ival*OOU8MAX;
+ F32 delta = (upper - lower);
+ val *= delta;
+ val += lower;
+
+ F32 max_error = delta*OOU8MAX;
+
+ // make sure that zero's come through as zero
+ if (fabsf(val) < max_error)
+ val = 0.f;
+
+ return val;
+}
+
+inline U8 F32_TO_STRING(F32 val, F32 lower, F32 upper)
+{
+ val = llclamp(val, lower, upper); //[lower, upper]
+ // make sure that the value is positive and normalized to <0, 1>
+ val -= lower; //[0, upper-lower]
+ val /= (upper - lower); //[0,1]
+ val = val * MAXSTRINGVAL; //[0, MAXSTRINGVAL]
+ val = floor(val + 0.5f); //[0, MAXSTRINGVAL]
+
+ U8 stringVal = (U8)(val) + FIRSTVALIDCHAR; //[FIRSTVALIDCHAR, MAXSTRINGVAL + FIRSTVALIDCHAR]
+ return stringVal;
+}
+
+inline F32 STRING_TO_F32(U8 ival, F32 lower, F32 upper)
+{
+ // remove empty space left for NULL, newline, etc.
+ ival -= FIRSTVALIDCHAR; //[0, MAXSTRINGVAL]
+
+ F32 val = (F32)ival * (1.f / (F32)MAXSTRINGVAL); //[0, 1]
+ F32 delta = (upper - lower);
+ val *= delta; //[0, upper - lower]
+ val += lower; //[lower, upper]
+
+ return val;
+}
+
+#endif
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