FGFS-4.1/OpenSceneGraph
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Added improved handling of center justificaion of multiline text

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This commit is contained in:
Robert Osfield 2005-03-03 12:33:07 +00:00
parent 91b5e8608b
commit c3f40e2e67
2 changed files with 129 additions and 5 deletions
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6
include/osgText/Text
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@ -245,6 +245,7 @@ public:
struct OSGTEXT_EXPORT GlyphQuads
{
typedef std::vector<Font::Glyph*> Glyphs;
typedef std::vector<unsigned int> LineNumbers;
typedef std::vector<osg::Vec2> Coords2;
typedef std::vector<osg::Vec3> Coords3;
typedef std::vector<osg::Vec2> TexCoords;
@ -253,11 +254,11 @@ public:
Coords2 _coords;
osg::buffered_object<Coords3> _transformedCoords;
TexCoords _texcoords;
LineNumbers _lineNumbers;
Glyphs getGlyphs() { return _glyphs; }
const Glyphs getGlyphs() const { return _glyphs; }
Coords2& getCoords() { return _coords; }
const Coords2& getCoords() const { return _coords; }
@ -266,6 +267,9 @@ public:
TexCoords& getTexCoords() { return _texcoords; }
const TexCoords& getTexCoords() const { return _texcoords; }
LineNumbers& getLineNumbers() { return _lineNumbers; }
const LineNumbers& getLineNumbers() const { return _lineNumbers; }
};
typedef std::map<osg::ref_ptr<osg::StateSet>,GlyphQuads> TextureGlyphQuadMap;

128
src/osgText/Text.cpp
View File

@ -17,6 +17,7 @@
#include <osg/Math>
#include <osg/GL>
#include <osg/Notify>
#include <osgUtil/CullVisitor>
#include <osgDB/ReadFile>
@ -385,6 +386,8 @@ void Text::computeGlyphRepresentation()
deliminatorSet.insert(':');
deliminatorSet.insert('.');
unsigned int lineNumber = 0;
for(String::iterator itr=_text.begin();
itr!=_text.end();
)
@ -468,6 +471,7 @@ void Text::computeGlyphRepresentation()
GlyphQuads& glyphquad = _textureGlyphQuadMap[glyph->getTexture()->getStateSet()];
glyphquad._glyphs.push_back(glyph);
glyphquad._lineNumbers.push_back(lineNumber);
// set up the coords of the quad
glyphquad._coords.push_back(local+osg::Vec2(0.0f,height));
@ -534,16 +538,17 @@ void Text::computeGlyphRepresentation()
break;
}
++lineNumber;
}
// compute the bounding box
_textBB.init();
for(TextureGlyphQuadMap::const_iterator titr=_textureGlyphQuadMap.begin();
titr!=_textureGlyphQuadMap.end();
++titr)
{
const GlyphQuads& glyphquad = titr->second;
for(GlyphQuads::Coords2::const_iterator citr = glyphquad._coords.begin();
citr != glyphquad._coords.end();
++citr)
@ -552,11 +557,126 @@ void Text::computeGlyphRepresentation()
}
}
if (!_textureGlyphQuadMap.empty())
if (lineNumber>1)
{
setStateSet(const_cast<osg::StateSet*>((*_textureGlyphQuadMap.begin()).first.get()));
// account for line justification
typedef std::vector<osg::Vec2> LineDimensions;
LineDimensions minLineCoords(lineNumber, osg::Vec2(FLT_MAX,FLT_MAX));
LineDimensions maxLineCoords(lineNumber, osg::Vec2(-FLT_MAX,-FLT_MAX));
// osg::notify(osg::NOTICE)<<"lineNumber="<<lineNumber<<std::endl;
for(TextureGlyphQuadMap::const_iterator titr=_textureGlyphQuadMap.begin();
titr!=_textureGlyphQuadMap.end();
++titr)
{
const GlyphQuads& glyphquad = titr->second;
const GlyphQuads::Coords2& coords = glyphquad._coords;
unsigned int coordIndex = 0;
for(GlyphQuads::LineNumbers::const_iterator litr = glyphquad._lineNumbers.begin();
litr != glyphquad._lineNumbers.end();
++litr)
{
unsigned int line = *litr;
osg::Vec2& minLineCoord = minLineCoords[line];
osg::Vec2& maxLineCoord = maxLineCoords[line];
for(unsigned int ci=0;ci<4;++ci)
{
const osg::Vec2& coord = coords[coordIndex++];
if (coord.x()<minLineCoord.x()) minLineCoord.x()=coord.x();
if (coord.y()<minLineCoord.y()) minLineCoord.y()=coord.y();
if (coord.x()>maxLineCoord.x()) maxLineCoord.x()=coord.x();
if (coord.y()>maxLineCoord.y()) maxLineCoord.y()=coord.y();
}
}
}
// osg::notify(osg::NOTICE)<<"Text dimensions min="<<_textBB.xMin()<<" "<<_textBB.yMin()<<" max="<<_textBB.xMax()<<" "<<_textBB.yMax()<<std::endl;
typedef std::vector<osg::Vec2> LineOffsets;
LineOffsets lineOffsets(lineNumber,osg::Vec2(0.0f,0.0f));
for(unsigned int li=0;li<lineNumber;++li)
{
osg::Vec2& minCoord = minLineCoords[li];
osg::Vec2& maxCoord = maxLineCoords[li];
osg::Vec2& lineOffset = lineOffsets[li];
if (horizontal)
{
switch(_alignment)
{
case LEFT_BASE_LINE:
case LEFT_TOP:
case LEFT_CENTER:
case LEFT_BOTTOM: lineOffset.x() = _textBB.xMin() - minCoord.x(); break;
case CENTER_BASE_LINE:
case CENTER_TOP:
case CENTER_CENTER:
case CENTER_BOTTOM: lineOffset.x() = (_textBB.xMin()-minCoord.x()+_textBB.xMax()-maxCoord.x())*0.5f; break;
case RIGHT_BASE_LINE:
case RIGHT_TOP:
case RIGHT_CENTER:
case RIGHT_BOTTOM: lineOffset.x() = _textBB.xMax() - maxCoord.x(); break;
}
}
else
{
switch(_alignment)
{
case LEFT_TOP:
case CENTER_TOP:
case RIGHT_TOP: lineOffset.y() = _textBB.yMax() - maxCoord.y(); break;
case LEFT_CENTER:
case CENTER_CENTER:
case RIGHT_CENTER: lineOffset.y() = (_textBB.yMin()-minCoord.y()+_textBB.yMax()-maxCoord.y())*0.5f; break;
case LEFT_BASE_LINE:
case CENTER_BASE_LINE:
case RIGHT_BASE_LINE: break;
case LEFT_BOTTOM:
case CENTER_BOTTOM:
case RIGHT_BOTTOM: lineOffset.y() = _textBB.yMin() - minCoord.y(); break;
}
}
// osg::notify(osg::NOTICE)<<" mincoords = "<<minLineCoords[li]<<" max = "<<maxLineCoords[li]<<std::endl;
// osg::notify(osg::NOTICE)<<" offset = "<<lineOffset<<std::endl;
}
// shift lines
for(TextureGlyphQuadMap::iterator titr=_textureGlyphQuadMap.begin();
titr!=_textureGlyphQuadMap.end();
++titr)
{
GlyphQuads& glyphquad = titr->second;
GlyphQuads::Coords2& coords = glyphquad._coords;
unsigned int coordIndex = 0;
for(GlyphQuads::LineNumbers::iterator litr = glyphquad._lineNumbers.begin();
litr != glyphquad._lineNumbers.end();
++litr)
{
unsigned int line = *litr;
osg::Vec2& lineOffset = lineOffsets[line];
if (lineOffset.x()!=0.0f || lineOffset.y()!=0.0f)
{
for(unsigned int ci=0;ci<4;++ci)
{
coords[coordIndex++] += lineOffset;
}
}
else
{
coordIndex += 4;
}
}
}
}
setStateSet(const_cast<osg::StateSet*>((*_textureGlyphQuadMap.begin()).first.get()));
computePositions();
}