#include "FTBitmapGlyph.h"
FTBitmapGlyph::FTBitmapGlyph( FT_Glyph glyph)
: FTGlyph(),
destWidth(0),
destHeight(0),
data(0)
{
// This function will always fail if the glyph's format isn't scalable????
err = FT_Glyph_To_Bitmap( &glyph, ft_render_mode_mono, 0, 1);
if( err || ft_glyph_format_bitmap != glyph->format)
{
return;
}
FT_BitmapGlyph bitmap = (FT_BitmapGlyph)glyph;
FT_Bitmap* source = &bitmap->bitmap;
//check the pixel mode
//ft_pixel_mode_grays
unsigned int srcWidth = source->width;
unsigned int srcHeight = source->rows;
unsigned int srcPitch = source->pitch;
// FIXME What about dest alignment?
destWidth = srcWidth;
destHeight = srcHeight;
if( destWidth && destHeight)
{
data = new unsigned char[srcPitch * destHeight];
unsigned char* dest = data + (( destHeight - 1) * srcPitch);
unsigned char* src = source->buffer;
size_t destStep = srcPitch * 2;
for( unsigned int y = 0; y < srcHeight; ++y)
{
for( unsigned int x = 0; x < srcPitch; ++x)
{
*dest++ = *src++;
}
dest -= destStep;
}
}
bBox = FTBBox( glyph);
advance = static_cast<float>(glyph->advance.x >> 16);
pos.x = bitmap->left;
pos.y = srcHeight - bitmap->top;
// Is this the right place to do this?
FT_Done_Glyph( glyph );
}
FTBitmapGlyph::~FTBitmapGlyph()
{
delete [] data;
}
float FTBitmapGlyph::Render( const FTPoint& pen)
{
if( data)
{
// Move the glyph origin
glBitmap( 0, 0, 0.0, 0.0, pen.x + pos.x, pen.y - pos.y, (const GLubyte*)0 );
glBitmap( destWidth, destHeight, 0.0f, 0.0, 0.0, 0.0, (const GLubyte*)data);
// Restore the glyph origin
glBitmap( 0, 0, 0.0, 0.0, -pen.x - pos.x, -pen.y + pos.y, (const GLubyte*)0 );
}
return advance;
}
