Adding upstream version 2.10.34.upstream/2.10.34upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 153 insertions, 0 deletions

diff --git a/libgimpmath/gimpmath.h b/libgimpmath/gimpmath.h
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+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpmath.h
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_MATH_H__
+#define __GIMP_MATH_H__
+
+
+#include <math.h>
+
+#ifdef HAVE_IEEEFP_H
+#include <ieeefp.h>
+#endif
+
+#ifdef G_OS_WIN32
+#include <float.h>
+#endif
+
+#define __GIMP_MATH_H_INSIDE__
+
+#include <libgimpmath/gimpmathtypes.h>
+
+#include <libgimpmath/gimpmatrix.h>
+#include <libgimpmath/gimpmd5.h>
+#include <libgimpmath/gimpvector.h>
+
+#undef __GIMP_MATH_H_INSIDE__
+
+
+G_BEGIN_DECLS
+
+
+/**
+ * SECTION: gimpmath
+ * @title: GimpMath
+ * @short_description: Mathematical definitions and macros.
+ *
+ * Mathematical definitions and macros for use both by the GIMP
+ * application and plug-ins. These macros should be used rather than
+ * the ones from &lt;math.h&gt; for enhanced portability.
+ **/
+
+
+/**
+ * RINT:
+ * @x: the value to be rounded
+ *
+ * This macro rounds its argument @x to an integer value in floating
+ * point format. Use RINT() instead of rint().
+ **/
+#if defined (HAVE_RINT) && 0
+/* note:  rint() depends on the current floating-point rounding mode.  when the
+ * rounding mode is FE_TONEAREST, it, in parctice, breaks ties to even.  this
+ * is different from 'floor (x + 0.5)', which breaks ties up.  in other words
+ * 'rint (2.5) == 2.0', while 'floor (2.5 + 0.5) == 3.0'.  this is asking for
+ * trouble, so let's just use the latter.
+ */
+#define RINT(x) rint(x)
+#else
+#define RINT(x) floor ((x) + 0.5)
+#endif
+
+/**
+ * ROUND:
+ * @x: the value to be rounded.
+ *
+ * This macro rounds its positive argument @x to the nearest integer.
+ **/
+#define ROUND(x) ((int) ((x) + 0.5))
+
+/**
+ * SIGNED_ROUND:
+ * @x: the value to be rounded.
+ *
+ * This macro rounds its argument @x to the nearest integer.
+ **/
+#define SIGNED_ROUND(x) ((int) RINT (x))
+
+/**
+ * SQR:
+ * @x: the value to be squared.
+ *
+ * This macro squares its argument @x.
+ **/
+#define SQR(x) ((x) * (x))
+
+/**
+ * MAX255:
+ * @a: the value to be limited.
+ *
+ * This macro limits it argument @a, an (0-511) int, to 255.
+ **/
+#define MAX255(a)  ((a) | (((a) & 256) - (((a) & 256) >> 8)))
+
+/**
+ * CLAMP0255:
+ * @a: the value to be clamped.
+ *
+ * This macro clamps its argument @a, an int32-range int, between 0
+ * and 255 inclusive.
+ **/
+#define CLAMP0255(a)  CLAMP(a,0,255)
+
+/**
+ * SAFE_CLAMP:
+ * @x:    the value to be limited.
+ * @low:  the lower limit.
+ * @high: the upper limit.
+ *
+ * Ensures that @x is between the limits set by @low and @high,
+ * even if @x is NaN. If @low is greater than @high, or if either
+ * of them is NaN, the result is undefined.
+ *
+ * Since: 2.10
+ **/
+#define SAFE_CLAMP(x, low, high)  ((x) > (low) ? (x) < (high) ? (x) : (high) : (low))
+
+/**
+ * gimp_deg_to_rad:
+ * @angle: the angle to be converted.
+ *
+ * This macro converts its argument @angle from degree to radian.
+ **/
+#define gimp_deg_to_rad(angle) ((angle) * (2.0 * G_PI) / 360.0)
+
+/**
+ * gimp_rad_to_deg:
+ * @angle: the angle to be converted.
+ *
+ * This macro converts its argument @angle from radian to degree.
+ **/
+#define gimp_rad_to_deg(angle) ((angle) * 360.0 / (2.0 * G_PI))
+
+
+G_END_DECLS
+
+#endif /* __GIMP_MATH_H__ */