IABSD.fr/xenocara/lib/fontconfig/src/fcmatrix.c

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  Commit

• Author : matthieu
  Date : 2010-03-25 21:45:57
  Hash : e248f656
  Message : Update to fontconfig 2.8.0. Tested on a full ports build by naddy@.

• lib/fontconfig/src/fcmatrix.c

• /*
   * fontconfig/src/fcmatrix.c
   *
   * 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 "fcint.h"
  #include <math.h>
  #include <stdlib.h>
  #include <ctype.h>
  
  const FcMatrix    FcIdentityMatrix = { 1, 0, 0, 1 };
  
  FcMatrix *
  FcMatrixCopy (const FcMatrix *mat) 
  {
      FcMatrix *r;
      if(!mat) 
  	return 0;
      r = (FcMatrix *) malloc (sizeof (*r) );
      if (!r)
  	return 0;
      FcMemAlloc (FC_MEM_MATRIX, sizeof (FcMatrix));
      *r = *mat;
      return r;
  }
  
  void
  FcMatrixFree (FcMatrix *mat)
  {
      if (mat != &FcIdentityMatrix)
      {
  	FcMemFree (FC_MEM_MATRIX, sizeof (FcMatrix));
  	free (mat);
      }
  }
  
  FcBool
  FcMatrixEqual (const FcMatrix *mat1, const FcMatrix *mat2)
  {
      if(mat1 == mat2) return FcTrue;
      if(mat1 == 0 || mat2 == 0) return FcFalse;
      return mat1->xx == mat2->xx && 
  	   mat1->xy == mat2->xy &&
  	   mat1->yx == mat2->yx &&
  	   mat1->yy == mat2->yy;
  }
  
  void
  FcMatrixMultiply (FcMatrix *result, const FcMatrix *a, const FcMatrix *b)
  {
      FcMatrix	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
  FcMatrixRotate (FcMatrix *m, double c, double s)
  {
      FcMatrix	r;
  
      /*
       * X Coordinate system is upside down, swap to make
       * rotations counterclockwise
       */
      r.xx = c;
      r.xy = -s;
      r.yx = s;
      r.yy = c;
      FcMatrixMultiply (m, &r, m);
  }
  
  void
  FcMatrixScale (FcMatrix *m, double sx, double sy)
  {
      FcMatrix	r;
  
      r.xx = sx;
      r.xy = 0;
      r.yx = 0;
      r.yy = sy;
      FcMatrixMultiply (m, &r, m);
  }
  
  void
  FcMatrixShear (FcMatrix *m, double sh, double sv)
  {
      FcMatrix	r;
  
      r.xx = 1;
      r.xy = sh;
      r.yx = sv;
      r.yy = 1;
      FcMatrixMultiply (m, &r, m);
  }
  #define __fcmatrix__
  #include "fcaliastail.h"
  #undef __fcmatrix__