http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/libart-2.0/libart_lgpl/art_affine.h

/* Libart_LGPL - library of basic graphic primitives * Copyright (C) 1998 Raph Levien * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifndef __ART_AFFINE_H__ #define __ART_AFFINE_H__ #ifdef LIBART_COMPILATION #include "art_point.h" #else #include <libart_lgpl/art_point.h> #endif #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ void art_affine_point (ArtPoint *dst, const ArtPoint *src, const double affine[6]); void art_affine_invert (double dst_affine[6], const double src_affine[6]); /* flip the matrix, FALSE, FALSE is a simple copy operation, and TRUE, TRUE equals a rotation by 180 degrees */ void art_affine_flip (double dst_affine[6], const double src_affine[6], int horz, int vert); void art_affine_to_string (char str[128], const double src[6]); void art_affine_multiply (double dst[6], const double src1[6], const double src2[6]); /* set up the identity matrix */ void art_affine_identity (double dst[6]); /* set up a scaling matrix */ void art_affine_scale (double dst[6], double sx, double sy); /* set up a rotation matrix; theta is given in degrees */ void art_affine_rotate (double dst[6], double theta); /* set up a shearing matrix; theta is given in degrees */ void art_affine_shear (double dst[6], double theta); /* set up a translation matrix */ void art_affine_translate (double dst[6], double tx, double ty); /* find the affine's "expansion factor", i.e. the scale amount */ double art_affine_expansion (const double src[6]); /* Determine whether the affine transformation is rectilinear, i.e. whether a rectangle aligned to the grid is transformed into another rectangle aligned to the grid. */ int art_affine_rectilinear (const double src[6]); /* Determine whether two affine transformations are equal within grid allignment */ int art_affine_equal (double matrix1[6], double matrix2[6]); #ifdef __cplusplus } #endif /* __cplusplus */ #endif /* __ART_AFFINE_H__ */