Composes Postscript document as three separate and independant streams for header, body and footer. More...
#include <LASi.h>
Classes | |
class | GlyphId |
For internal use only. More... | |
class | write_glyph_routine_to_stream |
For internal use only. More... | |
Public Member Functions | |
PostscriptDocument () | |
~PostscriptDocument () | |
void | setFont (const char *const family="sans", LASi::FontStyle=LASi::NORMAL_STYLE, LASi::FontWeight=LASi::NORMAL_WEIGHT, LASi::FontVariant=LASi::NORMAL_VARIANT, LASi::FontStretch=LASi::NORMAL_STRETCH) |
Sets the font that all subsequent text written to bodyStream() or footerStream() will be rendered with. | |
void | setFontSize (const double size) |
Sets the font size, in points, that all subsequent text written to bodyStream() or footerStream() will be rendered with. | |
std::ostringstream & | osHeader () |
Returns stream for Postscript header. | |
oPostscriptStream & | osBody () |
Returns stream for Postscript body. | |
oPostscriptStream & | osFooter () |
Returns stream for Postscript footer. | |
void | write (std::ostream &os, double llx=0, double lly=0, double urx=0, double ury=0) |
Closes all streams and writes completed Postscript document to os. | |
void | get_dimensions (const char *s, double *lineSpacing, double *xAdvance=NULL, double *yMin=NULL, double *yMax=NULL) |
Return string dimensions: lineSpacing: inter-line spacing xAdvance: width of the string yMin: y-coordinate bounding the lowest descender, Indic under-consonantal vowel, etc. | |
void | get_dimensions (std::string s, double *lineSpacing, double *xAdvance=NULL, double *yMin=NULL, double *yMax=NULL) |
Returns the line spacing, x-advance, y-minimum and y-maximum based on the current font face and font size. | |
Protected Types | |
typedef std::map< GlyphId, FreetypeGlyphMgr > | GlyphMap |
Maps glyph routine name to FT_Glyph instance. | |
typedef void(PostscriptDocument::* | GLYPH_FUNC )(const GlyphMap::value_type &, void *contextData) |
Pointer to a function that takes a reference to a glyph and to x and y coordinates. | |
Protected Member Functions | |
void | invoke_glyph_routine (const GlyphMap::value_type &, void *contextData) |
void | accrue_dimensions (const GlyphMap::value_type &, void *contextData1) |
void | for_each_glyph_do (const std::string &, const GLYPH_FUNC, void *contextData, bool applyOffset=false) |
Decomposes string into glyphs and applies GLYPH_FUNC to each glyph. | |
PangoContext * | pangoContext () const |
std::string | glyphProcName () const |
double | getFontSize () |
Private Attributes | |
GlyphMap | _glyphMap |
ContextMgr * | _pContextMgr |
double | _fontSize |
std::ostringstream | _osHeader |
oPostscriptStream | _osBody |
oPostscriptStream | _osFooter |
Static Private Attributes | |
static const unsigned int | DRAWING_SCALE = PANGO_SCALE |
Friends | |
class | write_glyph_routine_to_stream |
class | show |
Composes Postscript document as three separate and independant streams for header, body and footer.
Body and footer streams respond to LASi::show applicator which generates Postscript commands to display a string by using glyph routines instead of a Postscript font.
typedef void(PostscriptDocument::* LASi::PostscriptDocument::GLYPH_FUNC)(const GlyphMap::value_type &, void *contextData) [protected] |
Pointer to a function that takes a reference to a glyph and to x and y coordinates.
May return new x and y coordinates.
typedef std::map<GlyphId, FreetypeGlyphMgr> LASi::PostscriptDocument::GlyphMap [protected] |
Maps glyph routine name to FT_Glyph instance.
PostscriptDocument::PostscriptDocument | ( | ) |
PostscriptDocument::~PostscriptDocument | ( | ) |
References _pContextMgr.
void LASi::PostscriptDocument::accrue_dimensions | ( | const GlyphMap::value_type & | , | |
void * | contextData1 | |||
) | [protected] |
Referenced by get_dimensions().
void LASi::PostscriptDocument::for_each_glyph_do | ( | const std::string & | , | |
const | GLYPH_FUNC, | |||
void * | contextData, | |||
bool | applyOffset = false | |||
) | [protected] |
Decomposes string into glyphs and applies GLYPH_FUNC to each glyph.
Referenced by LASi::show::apply(), and get_dimensions().
void PostscriptDocument::get_dimensions | ( | const char * | s, | |
double * | lineSpacing, | |||
double * | xAdvance = NULL , |
|||
double * | yMin = NULL , |
|||
double * | yMax = NULL | |||
) |
Return string dimensions: lineSpacing: inter-line spacing xAdvance: width of the string yMin: y-coordinate bounding the lowest descender, Indic under-consonantal vowel, etc.
Returns the line spacing, x-advance, y-minimum and y-maximum based on the current font face and font size.
yMax: y-coordinate bounding the highest ascender, diacritic, Indic over-letter vowel, etc.
A bounding box around the text string, s, can be constructed from the xAdvance, yMinimum, and yMaximum. yMinimum tells you the descent from the baseline. yMaximum tells you the ascent from the baseline. The line spacing provides an inter-line spacing for multi-line text layout.
This version accepts a const C-style character string.
References _fontSize, accrue_dimensions(), DRAWING_SCALE, for_each_glyph_do(), StringDimensions::getLineSpacing(), StringDimensions::getXAdvance(), StringDimensions::getYMax(), and StringDimensions::getYMin().
Referenced by get_dimensions().
void PostscriptDocument::get_dimensions | ( | std::string | s, | |
double * | lineSpacing, | |||
double * | xAdvance = NULL , |
|||
double * | yMin = NULL , |
|||
double * | yMax = NULL | |||
) |
Returns the line spacing, x-advance, y-minimum and y-maximum based on the current font face and font size.
A bounding box around the text string, s, can be constructed from the xAdvance, yMinimum, and yMaximum. yMinimum tells you the descent from the baseline. yMaximum tells you the ascent from the baseline. The line spacing provides an inter-line spacing for multi-line text layout.
This version accepts an STL standard string class string.
References get_dimensions().
double LASi::PostscriptDocument::getFontSize | ( | ) | [inline, protected] |
std::string LASi::PostscriptDocument::glyphProcName | ( | ) | const [protected] |
void LASi::PostscriptDocument::invoke_glyph_routine | ( | const GlyphMap::value_type & | , | |
void * | contextData | |||
) | [protected] |
Referenced by LASi::show::apply().
oPostscriptStream& LASi::PostscriptDocument::osBody | ( | ) | [inline] |
Returns stream for Postscript body.
oPostscriptStream& LASi::PostscriptDocument::osFooter | ( | ) | [inline] |
Returns stream for Postscript footer.
std::ostringstream& LASi::PostscriptDocument::osHeader | ( | ) | [inline] |
Returns stream for Postscript header.
PangoContext * PostscriptDocument::pangoContext | ( | ) | const [inline, protected] |
void PostscriptDocument::setFont | ( | const char *const | family = "sans" , |
|
LASi::FontStyle | style = LASi::NORMAL_STYLE , |
|||
LASi::FontWeight | weight = LASi::NORMAL_WEIGHT , |
|||
LASi::FontVariant | variant = LASi::NORMAL_VARIANT , |
|||
LASi::FontStretch | stretch = LASi::NORMAL_STRETCH | |||
) |
Sets the font that all subsequent text written to bodyStream() or footerStream() will be rendered with.
References _pContextMgr, LASi::BOLD, LASi::CONDENSED, DRAWING_SCALE, LASi::EXPANDED, LASi::EXTRACONDENSED, LASi::EXTRAEXPANDED, LASi::HEAVY, LASi::ITALIC, LASi::LIGHT, LASi::NORMAL_STRETCH, LASi::NORMAL_STYLE, LASi::NORMAL_VARIANT, LASi::NORMAL_WEIGHT, LASi::OBLIQUE, LASi::SEMICONDENSED, LASi::SEMIEXPANDED, LASi::SMALLCAPS, LASi::ULTRABOLD, LASi::ULTRACONDENSED, LASi::ULTRAEXPANDED, and LASi::ULTRALIGHT.
Referenced by LASi::setFont::apply().
void LASi::PostscriptDocument::setFontSize | ( | const double | size | ) | [inline] |
Sets the font size, in points, that all subsequent text written to bodyStream() or footerStream() will be rendered with.
Referenced by LASi::setFontSize::apply().
void PostscriptDocument::write | ( | std::ostream & | os, | |
double | llx = 0 , |
|||
double | lly = 0 , |
|||
double | urx = 0 , |
|||
double | ury = 0 | |||
) |
Closes all streams and writes completed Postscript document to os.
Writes out the document.
Header will include glyph routines for all text glyphs in body and footer.
2006.05.01.ET Addendum: To create an EPS document, just include the the four BoundingBox coordinates llx, lly, urx, ury (dimensions in points). These are optional parameters -- When not included, you'll get a regular PS document. When included, you'll get an EPS document.
References _glyphMap, _osBody, _osFooter, _osHeader, _pContextMgr, and write_glyph_routine_to_stream.
friend class show [friend] |
friend class write_glyph_routine_to_stream [friend] |
Referenced by write().
double LASi::PostscriptDocument::_fontSize [private] |
Referenced by get_dimensions().
GlyphMap LASi::PostscriptDocument::_glyphMap [private] |
Referenced by write().
Referenced by write().
Referenced by write().
std::ostringstream LASi::PostscriptDocument::_osHeader [private] |
Referenced by write().
ContextMgr* LASi::PostscriptDocument::_pContextMgr [private] |
Referenced by setFont(), write(), and ~PostscriptDocument().
const unsigned int PostscriptDocument::DRAWING_SCALE = PANGO_SCALE [static, private] |