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authorReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
committerReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
commitf4092abdf94af6a99aff944d6264bc1284e8bdd4 (patch)
tree2ac1c9cc16ceb93edb2c4382c088dac5aeafdf0f /nx-X11/lib/Xft1/xftmatrix.c
parenta840692edc9c6d19cd7c057f68e39c7d95eb767d (diff)
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Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1
Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository
Diffstat (limited to 'nx-X11/lib/Xft1/xftmatrix.c')
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diff --git a/nx-X11/lib/Xft1/xftmatrix.c b/nx-X11/lib/Xft1/xftmatrix.c
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+/*
+ * $XFree86: xc/lib/Xft/xftmatrix.c,v 1.1 2001/03/30 18:50:18 keithp Exp $
+ *
+ * Copyright © 2000 Tuomas J. Lukka
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Tuomas Lukka not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Tuomas Lukka makes no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * TUOMAS LUKKA DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL TUOMAS LUKKA BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <math.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include "xftint.h"
+
+XftMatrix *
+_XftSaveMatrix (const XftMatrix *mat)
+{
+ XftMatrix *r;
+ if(!mat)
+ return 0;
+ r = (XftMatrix *) malloc (sizeof (*r) );
+ if (!r)
+ return 0;
+ *r = *mat;
+ return r;
+}
+
+int
+XftMatrixEqual (const XftMatrix *mat1, const XftMatrix *mat2)
+{
+ if(mat1 == mat2) return True;
+ if(mat1 == 0 || mat2 == 0) return False;
+ return mat1->xx == mat2->xx &&
+ mat1->xy == mat2->xy &&
+ mat1->yx == mat2->yx &&
+ mat1->yy == mat2->yy;
+}
+
+void
+XftMatrixMultiply (XftMatrix *result, XftMatrix *a, XftMatrix *b)
+{
+ XftMatrix r;
+
+ r.xx = a->xx * b->xx + a->xy * b->yx;
+ r.xy = a->xx * b->xy + a->xy * b->yy;
+ r.yx = a->yx * b->xx + a->yy * b->yx;
+ r.yy = a->yx * b->xy + a->yy * b->yy;
+ *result = r;
+}
+
+void
+XftMatrixRotate (XftMatrix *m, double c, double s)
+{
+ XftMatrix r;
+
+ /*
+ * X Coordinate system is upside down, swap to make
+ * rotations counterclockwise
+ */
+ r.xx = c;
+ r.xy = -s;
+ r.yx = s;
+ r.yy = c;
+ XftMatrixMultiply (m, &r, m);
+}
+
+void
+XftMatrixScale (XftMatrix *m, double sx, double sy)
+{
+ XftMatrix r;
+
+ r.xx = sx;
+ r.xy = 0;
+ r.yx = 0;
+ r.yy = sy;
+ XftMatrixMultiply (m, &r, m);
+}
+
+void
+XftMatrixShear (XftMatrix *m, double sh, double sv)
+{
+ XftMatrix r;
+
+ r.xx = 1;
+ r.xy = sh;
+ r.yx = sv;
+ r.yy = 1;
+ XftMatrixMultiply (m, &r, m);
+}