root/trunk/freetype/examples/example1.d

import freetype.ft;

import std.math;
import std.string;
import std.stdio;

const int WIDTH = 640;
const int HEIGHT = 480;


/* origin is the upper left corner */
ubyte[WIDTH][HEIGHT] image;


/* Replace this function with something useful. */

void drawBitmap( FT_Bitmap* bitmap, FT_Int x, FT_Int y )
{
    FT_Int i, j, p, q;
    FT_Int  x_max = x + bitmap.width;
    FT_Int  y_max = y + bitmap.rows;
    for ( i = x, p = 0; i < x_max; i++, p++ )
    {
        for ( j = y, q = 0; j < y_max; j++, q++ )
        {
            if ( i >= WIDTH || j >= HEIGHT )
                continue;
            image[j][i] |= bitmap.buffer[q * bitmap.width + p];
        }
    }
}

void showImage()
{
    int  i, j;

    for ( i = 0; i < HEIGHT; i++ )
    {
        for ( j = 0; j < WIDTH; j++ )
            putchar( image[i][j] == 0 ? ' ' : image[i][j] < 128 ? '+' : '*' );
        putchar( '\n' );
    }
}

int main( char[][]  args )
{
    FT_Library    library;
    FT_Face       face;

    FT_GlyphSlot  slot;
    FT_Matrix     matrix;                 /* transformation matrix */
    FT_UInt       glyph_index;
    FT_Vector     pen;                    /* untransformed origin  */
    FT_Error      error;

    char[]        filename;
    char*         text;

    double        angle;
    int           target_height;
    int           n, num_chars;
        
    
    filename      = args[1].dup;                           /* first argument     */
    text          = toStringz(args[2].dup);                /* second argument    */
    num_chars     = strlen( text );
    angle         = ( 25.0 / 360 ) * 3.14159 * 2;      /* use 25 degrees     */
    target_height = HEIGHT;

    error = FT_Init_FreeType( &library );              /* initialize library */
    /* error handling omitted */
    
    error = FT_New_Face( library, toStringz(args[1]), 0, &face ); /* create face object */
    /* error handling omitted */
    
    /* use 50pt at 100dpi */
    error = FT_Set_Char_Size( face, 50 * 64, 0, 100, 0 );  /* set character size */
    /* error handling omitted */
    
    slot = face.glyph;
    
    /* set up matrix */
    matrix.xx = cast(FT_Fixed)( cos( angle ) * 0x10000L );
    matrix.xy = cast(FT_Fixed)(-sin( angle ) * 0x10000L );
    matrix.yx = cast(FT_Fixed)( sin( angle ) * 0x10000L );
    matrix.yy = cast(FT_Fixed)( cos( angle ) * 0x10000L );  

    /* the pen position in 26.6 cartesian space coordinates; */
    /* start at (300,200) relative to the upper left corner  */
    pen.x = 300 * 64;
    pen.y = ( target_height - 200 ) * 64;

    for ( n = 0; n < num_chars; n++ )
    {
        /* set transformation */
        FT_Set_Transform( face, &matrix, &pen );
    
        /* load glyph image into the slot (erase previous one) */
        error = FT_Load_Char( face, text[n], FT_LOAD_RENDER );
        if ( error )
            continue;                 /* ignore errors */

        /* now, draw to our target surface (convert position) */
        drawBitmap( &slot.bitmap, slot.bitmap_left, target_height - slot.bitmap_top );
    
        /* increment pen position */
        pen.x += slot.advance.x;
        pen.y += slot.advance.y;
    }

    showImage();
    
    FT_Done_Face    ( face );
    FT_Done_FreeType( library );
    
    return 0;
}

/* EOF */