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  • Committer: Bazaar Package Importer
  • Author(s): Sebastian Dröge
  • Date: 2009-11-18 07:40:39 UTC
  • mfrom: (1.5.8 upstream) (64.2.3 squeeze)
  • Revision ID: james.westby@ubuntu.com-20091118074039-7d88ewja7jajppz6
Tags: 1.26.1-1
New upstream bugfix release.

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pango/pangofc-private.h
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PangoFontMetrics *pango_fc_font_create_metrics_for_context (PangoFcFont   *font,
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                                                            PangoContext  *context);
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/* To be made public at some point */
 
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#include <math.h>
 
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static G_GNUC_UNUSED void
 
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pango_matrix_get_font_scale_factors (const PangoMatrix *matrix,
 
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                                     double *xscale, double *yscale)
 
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{
 
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/*
 
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 * Based on cairo-matrix.c:_cairo_matrix_compute_scale_factors()
 
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 *
 
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 * Copyright 2005, Keith Packard
 
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 */
 
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  double major = 0, minor = 0;
 
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  if (matrix) {
 
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    double det = matrix->xx * matrix->yy - matrix->yx * matrix->xy;
 
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    if (det)
 
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      {
 
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        double x = matrix->xx;
 
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        double y = matrix->yx;
 
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        major = sqrt (x*x + y*y);
 
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        /*
 
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         * ignore mirroring
 
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         */
 
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        if (det < 0)
 
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          det = - det;
 
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        if (major)
 
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          minor = det / major;
 
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      }
 
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  }
 
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  if (xscale)
 
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    *xscale = major;
 
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  if (yscale)
 
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    *yscale = minor;
 
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}
 
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G_END_DECLS
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#endif /* __PANGOFC_PRIVATE_H__ */