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/*
* Copyright 2015 The Emscripten Authors. All rights reserved.
* Emscripten is available under two separate licenses, the MIT license and the
* University of Illinois/NCSA Open Source License. Both these licenses can be
* found in the LICENSE file.
*/
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <ft2build.h>
#include FT_FREETYPE_H
#undef __FTERRORS_H__
#define FT_ERRORDEF( e, v, s ) { e, s },
#define FT_ERROR_START_LIST {
#define FT_ERROR_END_LIST { 0, 0 } };
const struct {
int code;
const char* message;
} FT_Errors[] =
#include FT_ERRORS_H
void printError(FT_Error error) {
printf("FT_Error (%d) : %s\n", FT_Errors[error].code, FT_Errors[error].message);
}
int WIDTH = 0;
int HEIGHT = 0;
/* origin is the upper left corner */
unsigned char *image;
void
draw_bitmap( 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 < 0 || j < 0 ||
i >= WIDTH || j >= HEIGHT )
continue;
image[j*WIDTH + i] |= bitmap->buffer[q * bitmap->width + p];
}
}
}
void
show_image( void )
{
int i, j;
int count = 0;
for ( i = 0; i < HEIGHT; i++ )
{
for ( j = 0; j < WIDTH; j++ ) {
if (image[i*WIDTH + j]) count++;
putchar( image[i*WIDTH + j] == 0 ? ' '
: image[i*WIDTH + j] < 128 ? '+'
: '*' );
}
putchar( '\n' );
}
}
int
main( int argc,
char** argv )
{
FT_Library library;
FT_Face face;
FT_GlyphSlot slot;
FT_Vector pen;
FT_Error error;
char* filename;
char* text;
double angle;
int target_height;
int n, num_chars;
filename = "LiberationSansBold.ttf";
text = "w";
num_chars = strlen( text );
WIDTH = 16;
HEIGHT = 16;
target_height = HEIGHT;
image = (unsigned char*)malloc(WIDTH*HEIGHT);
for (int x = 0; x < WIDTH; x++)
for (int y = 0; y < HEIGHT; y++)
image[y*WIDTH + x] = 0;
error = FT_Init_FreeType( &library ); /* initialize library */
if (error) printError(error);
error = FT_New_Face( library, filename, 0, &face ); /* create face object */
if (error) printError(error);
error = FT_Set_Char_Size( face, 16 * 64, 0, 100, 0 ); /* set character size */
if (error) printError(error);
slot = face->glyph;
pen.x = 0;
pen.y = 0;
for ( n = 0; n < num_chars; n++ )
{
/* 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) */
draw_bitmap( &slot->bitmap,
slot->bitmap_left,
target_height - slot->bitmap_top );
/* increment pen position */
pen.x += slot->advance.x;
pen.y += slot->advance.y;
}
show_image();
FT_Done_Face ( face );
FT_Done_FreeType( library );
return 0;
}
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