ftsynth.h File Reference

#include <ft2build.h>

Include dependency graph for ftsynth.h:

Go to the source code of this file.

Functions
FT_BEGIN_HEADER	FT_GlyphSlot_Embolden (FT_GlyphSlot slot)
	FT_GlyphSlot_Oblique (FT_GlyphSlot slot)

Function Documentation

FT_GlyphSlot_Embolden()

FT_BEGIN_HEADER FT_GlyphSlot_Embolden

(

FT_GlyphSlot

slot

)

Definition at line 90 of file ftsynth.c.

  {
    FT_Library  library;
    FT_Face     face;
    FT_Error    error;
    FT_Pos      xstr, ystr;
 
 
    if ( !slot )
      return;
 
    library = slot->library;
    face    = slot->face;
 
    if ( slot->format != FT_GLYPH_FORMAT_OUTLINE &&
         slot->format != FT_GLYPH_FORMAT_BITMAP  )
      return;
 
    /* some reasonable strength */
    xstr = FT_MulFix( face->units_per_EM,
                      face->size->metrics.y_scale ) / 24;
    ystr = xstr;
 
    if ( slot->format == FT_GLYPH_FORMAT_OUTLINE )
      FT_Outline_EmboldenXY( &slot->outline, xstr, ystr );
 
    else /* slot->format == FT_GLYPH_FORMAT_BITMAP */
    {
      /* round to full pixels */
      xstr &= ~63;
      if ( xstr == 0 )
        xstr = 1 << 6;
      ystr &= ~63;
 
      /*
       * XXX: overflow check for 16-bit system, for compatibility
       *      with FT_GlyphSlot_Embolden() since FreeType 2.1.10.
       *      unfortunately, this function return no informations
       *      about the cause of error.
       */
      if ( ( ystr >> 6 ) > FT_INT_MAX || ( ystr >> 6 ) < FT_INT_MIN )
      {
        FT_TRACE1(( "FT_GlyphSlot_Embolden:" ));
        FT_TRACE1(( "too strong emboldening parameter ystr=%d\n", ystr ));
        return;
      }
      error = FT_GlyphSlot_Own_Bitmap( slot );
      if ( error )
        return;
 
      error = FT_Bitmap_Embolden( library, &slot->bitmap, xstr, ystr );
      if ( error )
        return;
    }
 
    if ( slot->advance.x )
      slot->advance.x += xstr;
 
    if ( slot->advance.y )
      slot->advance.y += ystr;
 
    slot->metrics.width        += xstr;
    slot->metrics.height       += ystr;
    slot->metrics.horiAdvance  += xstr;
    slot->metrics.vertAdvance  += ystr;
    slot->metrics.horiBearingY += ystr;
 
    /* XXX: 16-bit overflow case must be excluded before here */
    if ( slot->format == FT_GLYPH_FORMAT_BITMAP )
      slot->bitmap_top += (FT_Int)( ystr >> 6 );
  }

Referenced by IntGetRealGlyph().

FT_GlyphSlot_Oblique()

FT_GlyphSlot_Oblique

(

FT_GlyphSlot

slot

)

Definition at line 48 of file ftsynth.c.

  {
    FT_Matrix    transform;
    FT_Outline*  outline;
 
 
    if ( !slot )
      return;
 
    outline = &slot->outline;
 
    /* only oblique outline glyphs */
    if ( slot->format != FT_GLYPH_FORMAT_OUTLINE )
      return;
 
    /* we don't touch the advance width */
 
    /* For italic, simply apply a shear transform, with an angle */
    /* of about 12 degrees.                                      */
 
    transform.xx = 0x10000L;
    transform.yx = 0x00000L;
 
    transform.xy = 0x0366AL;
    transform.yy = 0x10000L;
 
    FT_Outline_Transform( outline, &transform );
  }

Referenced by IntGetRealGlyph().