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// This example uses the FreeType rendering library to produce
// LCD rendered bitmap (RGB) for the glyphs of a font
// Also gives the MurmurHash3 hash value of the bitmap rendered.
#include "bitmap.h"
int main(int argc, char const *argv[])
{
FT_Library library;
FT_Face face;
FT_GlyphSlot slot;
FT_Bitmap* bitmap;
FT_Error error;
const char* font_file; // Arguments
FT_UInt32 size;
FT_UInt glyph_index;
const char* character;
if (argc != 4)
{
printf("\nTo render a RGB bitmap of a glyph to be displayed on an \n");
printf("LCD surface and to generate the 128bit MurmurHash3 hash \n\n");
printf("Filter used is FT_LCD_FILTER_DEFAULT\n\n");
printf("Usage ./<exe> <font_file> <pt_size> <character>\n\n");
exit(0);
}
font_file = argv[1];
size = atoi(argv[2]);
character = argv[3];
error = FT_Init_FreeType( &library );
if(error){
printf("Error while initialising library\n");
}
error = FT_Library_SetLcdFilter( library,
FT_LCD_FILTER_DEFAULT );
if(error){
printf("Error while setting LCD filter\n");
}
error = FT_New_Face( library,
font_file,
0,
&face );
if(error){
printf("Error loading new face\n");
}
error = FT_Set_Char_Size( face,
size * 64,
0,
100,
0 );
if(error){
printf("Error setting character size\n");
}
glyph_index = FT_Get_Char_Index( face, *character );
slot = face->glyph;
error = FT_Load_Glyph( face,
glyph_index,
FT_LOAD_NO_BITMAP | FT_LOAD_TARGET_LCD );
if(error){
printf("Error loading glyph\n");
}
FT_Render_Glyph( slot,
FT_RENDER_MODE_LCD);
if(error){
printf("Error rendering the glyph\n");
}
bitmap = &slot->bitmap;
Write_Bitmap_Header(bitmap);
Write_Bitmap_Data_LCD_RGB(bitmap);
HASH_128 * murmur = (HASH_128 *) malloc(sizeof(HASH_128)) ;
murmur = Generate_Hash_x64_128(bitmap,murmur); // using the x64_128 function of the hash
printf("%08x %08x %08x %08x\n", murmur->hash[0], // Print hash
murmur->hash[1],
murmur->hash[2],
murmur->hash[3]);
FT_Done_Face ( face );
FT_Done_FreeType( library );
return 0;
}
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