--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libfreetype/src/base/ftsynth.c Mon Apr 25 01:46:54 2011 +0200
@@ -0,0 +1,160 @@
+/***************************************************************************/
+/* */
+/* ftsynth.c */
+/* */
+/* FreeType synthesizing code for emboldening and slanting (body). */
+/* */
+/* Copyright 2000-2001, 2002, 2003, 2004, 2005, 2006, 2010 by */
+/* David Turner, Robert Wilhelm, and Werner Lemberg. */
+/* */
+/* This file is part of the FreeType project, and may only be used, */
+/* modified, and distributed under the terms of the FreeType project */
+/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
+/* this file you indicate that you have read the license and */
+/* understand and accept it fully. */
+/* */
+/***************************************************************************/
+
+
+#include <ft2build.h>
+#include FT_SYNTHESIS_H
+#include FT_INTERNAL_DEBUG_H
+#include FT_INTERNAL_OBJECTS_H
+#include FT_OUTLINE_H
+#include FT_BITMAP_H
+
+
+ /*************************************************************************/
+ /* */
+ /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
+ /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
+ /* messages during execution. */
+ /* */
+#undef FT_COMPONENT
+#define FT_COMPONENT trace_synth
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /**** ****/
+ /**** EXPERIMENTAL OBLIQUING SUPPORT ****/
+ /**** ****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ /* documentation is in ftsynth.h */
+
+ FT_EXPORT_DEF( void )
+ FT_GlyphSlot_Oblique( FT_GlyphSlot slot )
+ {
+ FT_Matrix transform;
+ FT_Outline* 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 = 0x06000L;
+ transform.yy = 0x10000L;
+
+ FT_Outline_Transform( outline, &transform );
+ }
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /**** ****/
+ /**** EXPERIMENTAL EMBOLDENING/OUTLINING SUPPORT ****/
+ /**** ****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+
+ /* documentation is in ftsynth.h */
+
+ FT_EXPORT_DEF( void )
+ FT_GlyphSlot_Embolden( FT_GlyphSlot slot )
+ {
+ FT_Library library = slot->library;
+ FT_Face face = slot->face;
+ FT_Error error;
+ FT_Pos xstr, ystr;
+
+
+ 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 )
+ {
+ /* ignore error */
+ (void)FT_Outline_Embolden( &slot->outline, xstr );
+
+ /* this is more than enough for most glyphs; if you need accurate */
+ /* values, you have to call FT_Outline_Get_CBox */
+ xstr = xstr * 2;
+ ystr = xstr;
+ }
+ 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 embolding 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.horiBearingY += ystr;
+ slot->metrics.horiAdvance += xstr;
+ slot->metrics.vertBearingX -= xstr / 2;
+ slot->metrics.vertBearingY += ystr;
+ slot->metrics.vertAdvance += 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 );
+ }
+
+
+/* END */