FGFS-4.1/OpenSceneGraph
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Changed the osgText::Font implementation so it used a facade us abstract away

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the actual implemention. This has been done so that when a freetype font is
created the implementation can unloaded when the freetype plugin is unloaded
without breaking the main font.

Also add image margin around founds to prevent any image boundaries appearing.
This commit is contained in:
Robert Osfield
2003-03-06 17:11:24 +00:00
parent 0d9aaa5ca6
commit fab6f24f4e
10 changed files with 240 additions and 84 deletions
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26
src/osgText/DefaultFont.cpp
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@@ -22,6 +22,8 @@ using namespace osgText;
DefaultFont::DefaultFont()
{
_minFilterHint = osg::Texture::LINEAR_MIPMAP_LINEAR;
_magFilterHint = osg::Texture::NEAREST;
constructGlyphs();
}
@@ -190,15 +192,25 @@ void DefaultFont::constructGlyphs()
{0x00, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x00, 0x00}
};
_width = 8;
_height = 12;
unsigned int sourceWidth = 8;
unsigned int sourceHeight = 12;
_width = sourceWidth+2*_margin;
_height = sourceHeight+2*_margin;
// populate the glyph mp
for(unsigned int i=32;i<127;i++)
{
osg::ref_ptr<Glyph> glyph = new Glyph;
unsigned char* data = new unsigned char[8*12*2];
unsigned int dataSize = _width*_height*2;
unsigned char* data = new unsigned char[dataSize];
// clear the image to zeros.
for(unsigned char* p=data;p!=data+dataSize;++p) *p = 0;
glyph->setImage(_width,_height,1,
GL_LUMINANCE_ALPHA,
GL_LUMINANCE_ALPHA,GL_UNSIGNED_BYTE,
@@ -210,8 +222,13 @@ void DefaultFont::constructGlyphs()
unsigned char* ptr = rasters[i-32];
unsigned char value_on = 255;
unsigned char value_off = 0;
for(unsigned int row=0;row<_height;++row,++ptr)
// skip the top margin
data += (_margin*_width)*2;
for(unsigned int row=0;row<sourceHeight;++row,++ptr)
{
data+=2*_margin; // skip the left margin
(*data++)=((*ptr)&128)?value_on:value_off;
(*data++)=((*ptr)&128)?value_on:value_off;
(*data++)=((*ptr)&64)?value_on:value_off;
@@ -228,6 +245,7 @@ void DefaultFont::constructGlyphs()
(*data++)=((*ptr)&2)?value_on:value_off;
(*data++)=((*ptr)&1)?value_on:value_off;
(*data++)=((*ptr)&1)?value_on:value_off;
data+=2*_margin; // skip the right margin.
}