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* src/ftlyph.c (FT_Matrix_Multiply, FT_Matrix_Invert): Move to...

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* src/ftcalc.c: Here.  This fixes Savannah bug #23729.
This commit is contained in:
Werner Lemberg 2008-06-27 22:26:11 +00:00
parent a741c6f2aa
commit 4e7d984d94
3 changed files with 60 additions and 63 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2008-06-28 Werner Lemberg <wl@gnu.org>
* src/ftlyph.c (FT_Matrix_Multiply, FT_Matrix_Invert): Move to...
* src/ftcalc.c: Here. This fixes Savannah bug #23729.
2008-06-27 Werner Lemberg <wl@gnu.org>
* src/raster/ftraster.c (Vertical_Sweep_Drop, Horizontal_Sweep_Drop,

54
src/base/ftcalc.c
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@ -33,6 +33,7 @@
#include <ft2build.h>
#include FT_GLYPH_H
#include FT_INTERNAL_CALC_H
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_OBJECTS_H
@ -666,6 +667,59 @@
#endif /* FT_LONG64 */
/* documentation is in ftglyph.h */
FT_EXPORT_DEF( void )
FT_Matrix_Multiply( const FT_Matrix* a,
FT_Matrix *b )
{
FT_Fixed xx, xy, yx, yy;
if ( !a || !b )
return;
xx = FT_MulFix( a->xx, b->xx ) + FT_MulFix( a->xy, b->yx );
xy = FT_MulFix( a->xx, b->xy ) + FT_MulFix( a->xy, b->yy );
yx = FT_MulFix( a->yx, b->xx ) + FT_MulFix( a->yy, b->yx );
yy = FT_MulFix( a->yx, b->xy ) + FT_MulFix( a->yy, b->yy );
b->xx = xx; b->xy = xy;
b->yx = yx; b->yy = yy;
}
/* documentation is in ftglyph.h */
FT_EXPORT_DEF( FT_Error )
FT_Matrix_Invert( FT_Matrix* matrix )
{
FT_Pos delta, xx, yy;
if ( !matrix )
return FT_Err_Invalid_Argument;
/* compute discriminant */
delta = FT_MulFix( matrix->xx, matrix->yy ) -
FT_MulFix( matrix->xy, matrix->yx );
if ( !delta )
return FT_Err_Invalid_Argument; /* matrix can't be inverted */
matrix->xy = - FT_DivFix( matrix->xy, delta );
matrix->yx = - FT_DivFix( matrix->yx, delta );
xx = matrix->xx;
yy = matrix->yy;
matrix->xx = FT_DivFix( yy, delta );
matrix->yy = FT_DivFix( xx, delta );
return FT_Err_Ok;
}
/* documentation is in ftcalc.h */
FT_BASE_DEF( void )

64
src/base/ftglyph.c
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@ -4,7 +4,7 @@
/* */
/* FreeType convenience functions to handle glyphs (body). */
/* */
/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2007 by */
/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2007, 2008 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -45,68 +45,6 @@
#define FT_COMPONENT trace_glyph
/*************************************************************************/
/*************************************************************************/
/**** ****/
/**** Convenience functions ****/
/**** ****/
/*************************************************************************/
/*************************************************************************/
/* documentation is in ftglyph.h */
FT_EXPORT_DEF( void )
FT_Matrix_Multiply( const FT_Matrix* a,
FT_Matrix *b )
{
FT_Fixed xx, xy, yx, yy;
if ( !a || !b )
return;
xx = FT_MulFix( a->xx, b->xx ) + FT_MulFix( a->xy, b->yx );
xy = FT_MulFix( a->xx, b->xy ) + FT_MulFix( a->xy, b->yy );
yx = FT_MulFix( a->yx, b->xx ) + FT_MulFix( a->yy, b->yx );
yy = FT_MulFix( a->yx, b->xy ) + FT_MulFix( a->yy, b->yy );
b->xx = xx; b->xy = xy;
b->yx = yx; b->yy = yy;
}
/* documentation is in ftglyph.h */
FT_EXPORT_DEF( FT_Error )
FT_Matrix_Invert( FT_Matrix* matrix )
{
FT_Pos delta, xx, yy;
if ( !matrix )
return FT_Err_Invalid_Argument;
/* compute discriminant */
delta = FT_MulFix( matrix->xx, matrix->yy ) -
FT_MulFix( matrix->xy, matrix->yx );
if ( !delta )
return FT_Err_Invalid_Argument; /* matrix can't be inverted */
matrix->xy = - FT_DivFix( matrix->xy, delta );
matrix->yx = - FT_DivFix( matrix->yx, delta );
xx = matrix->xx;
yy = matrix->yy;
matrix->xx = FT_DivFix( yy, delta );
matrix->yy = FT_DivFix( xx, delta );
return FT_Err_Ok;
}
/*************************************************************************/
/*************************************************************************/
/**** ****/