#include "gl.h"
#include "FTBitmapGlyph.h"
#include "FTGL.h"
FTBitmapGlyph::FTBitmapGlyph( FT_Glyph glyph, int gi)
: FTGlyph( gi),
destWidth(0),
destHeight(0),
data(0)
{
if( !glyph->format == ft_glyph_format_bitmap)
{ return;}
// This function will always fail if the glyph's format isn't scalable????
FT_Error err = FT_Glyph_To_Bitmap( &glyph, ft_render_mode_mono, 0, 1);
if( err)
{return;}
FT_BitmapGlyph bitmap = (FT_BitmapGlyph)glyph;
FT_Bitmap* source = &bitmap->bitmap;
//check the pixel mode
//ft_pixel_mode_grays
int srcWidth = source->width;
int srcHeight = source->rows;
int srcPitch = source->pitch;
advance = glyph->advance.x >> 16; // this is 6 in the freetype docs!!!!!!
pos.x = bitmap->left;
pos.y = srcHeight - bitmap->top;
// FIXME The buffer is upside down. What about dest alignment?
destWidth = srcWidth;
destHeight = srcHeight;
data = new unsigned char[srcPitch * destHeight];
for(int y = 0; y < srcHeight; ++y)
{
--destHeight;
for(int x = 0; x < srcPitch; ++x)
{
*( data + ( destHeight * srcPitch + x)) = *( source->buffer + ( y * srcPitch) + x);
}
}
destHeight = srcHeight;
// discard glyph image (bitmap or not)
// Is this the right place to do this?
FT_Done_Glyph( glyph );
}
FTBitmapGlyph::~FTBitmapGlyph()
{
delete[] data;
}
float FTBitmapGlyph::Render( const FT_Vector& pen)
{
if( data != 0 )
{
glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT);
// doing this every frame is a bad?
glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE);
glPixelStorei( GL_UNPACK_ROW_LENGTH, 0);
glPixelStorei( GL_UNPACK_ALIGNMENT, 1);
// 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 );
glPopClientAttrib();
}
return advance;
}
