LASi
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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) |
Insert a Postscript glyph_routine call into output stream (contextData). | |
void | accrue_dimensions (const GlyphMap::value_type &, void *contextData) |
Add the next glyphs dimensions to the bounding box (contextData). | |
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.
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Pointer to a function that takes a reference to a glyph and to x and y coordinates.
May return new x and y coordinates.
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Maps glyph routine name to FT_Glyph instance.
PostscriptDocument::PostscriptDocument | ( | ) |
PostscriptDocument::~PostscriptDocument | ( | ) |
References _pContextMgr.
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Add the next glyphs dimensions to the bounding box (contextData).
If the advance is in the x direction (the usual case), the box grows in the x direction, yMax becomes the height of the tallest character, and yMin the descent of the most descending character.
mapval | std::pair<GlyphId, FreetypeGlyphMgr> |
contextData | std::pair<double, double>, the x and y dimensions |
References StringDimensions::accrueXAdvance(), StringDimensions::setYMax(), and StringDimensions::setYMin().
Referenced by get_dimensions().
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Decomposes string into glyphs and applies GLYPH_FUNC to each glyph.
References _fontSize, _glyphMap, FreetypeGlyphMgr::assign(), DRAWING_SCALE, evalReturnCode(), and pangoContext().
Referenced by LASi::show::apply(), and get_dimensions().
void PostscriptDocument::get_dimensions | ( | const char * | s, |
double * | lineSpacing, | ||
double * | xAdvance = NULL , |
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double * | yMin = NULL , |
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double * | yMax = NULL |
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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 , |
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double * | yMin = NULL , |
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double * | yMax = NULL |
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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().
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inlineprotected |
Referenced by invoke_glyph_routine().
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protected |
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Insert a Postscript glyph_routine call into output stream (contextData).
References getFontSize(), and LASi::PostscriptDocument::GlyphId::str().
Referenced by LASi::show::apply().
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Returns stream for Postscript body.
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Returns stream for Postscript footer.
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Returns stream for Postscript header.
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inlineprotected |
Referenced by for_each_glyph_do().
void PostscriptDocument::setFont | ( | const char *const | family = "sans" , |
LASi::FontStyle | style = LASi::NORMAL_STYLE , |
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LASi::FontWeight | weight = LASi::NORMAL_WEIGHT , |
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LASi::FontVariant | variant = LASi::NORMAL_VARIANT , |
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LASi::FontStretch | stretch = LASi::NORMAL_STRETCH |
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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().
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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 , |
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double | lly = 0 , |
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double | urx = 0 , |
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double | ury = 0 |
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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.
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friend |
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friend |
Referenced by write().
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private |
Referenced by for_each_glyph_do(), and get_dimensions().
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private |
Referenced by for_each_glyph_do(), and write().
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Referenced by write().
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Referenced by write().
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Referenced by write().
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private |
Referenced by setFont(), write(), and ~PostscriptDocument().
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staticprivate |
Referenced by for_each_glyph_do(), get_dimensions(), and setFont().