使用freetype2从ttf字库中提取任意大点阵字体

#include <ft2build.h>

#include FT_FREETYPE_H

int main(int argc, char **argv)

{

FT_Library library;

FT_Face face;

int error;

int i, j, k, counter;

unsigned char temp;

int char_index;

int font_size;

if (argc != 4)

{

printf("Usage:
test filename font_size index\n");

return 0;

}

char_index = atoi(argv[3]);

font_size = atoi(argv[2]);

error = FT_Init_FreeType(&library);

if (error)

{

printf("can
not init free type library!\n");

return 0;

}

error = FT_New_Face(library, argv[1], 0, &face);

if (error)

{

printf("create
new face falied!\n");

return 0;

}

error = FT_Set_Pixel_Sizes(face, 0, font_size);

if (error)

{

printf("set
font size error!\n");

return 0;

}

//printf("file family name
%s\n", face->family_name);

//printf("file style name
%s\n", face->style_name);

//printf("number of char
%d\n", face->num_glyphs);

//printf("number of fixed
bitmap %d\n", face->num_fixed_sizes);

//printf("Char size %d\n", face->size);

error = FT_Load_Glyph(face, char_index, FT_LOAD_DEFAULT);

if (error)

{

printf("Load
char error!\n");

return 0;

}

if (face->glyph->format != FT_GLYPH_FORMAT_BITMAP)

{

error = FT_Render_Glyph(face->glyph, FT_RENDER_MODE_MONO);

if (error)

{

printf("render
char failed!\n");

return 0;

}

}

// printf("rows %d, width %d\n", face->glyph->bitmap.rows, face->glyph->bitmap.width);

//printf("pitch %d\n", face->glyph->bitmap.pitch);

// printf("bit_map_left %d bit_map_top %d\n", face->glyph->bitmap_left,

// face->glyph->bitmap_top);

// printf("width %d height %d\n", face->glyph->metrics.width, face->glyph->metrics.height);

// printf("%d %d %d\n", face->glyph->metrics.horiBearingX, face->glyph->metrics.horiBearingY,

// face->glyph->metrics.horiAdvance);

for (j = 0; j < (font_size * 26) / 32 - face->glyph->bitmap_top; j++)

{

for (i = 0; i < font_size; i++)

{

printf("_");

}

printf("\n");

}

for (; j < face->glyph->bitmap.rows + (font_size * 26) / 32 - face->glyph->bitmap_top; j++)

{

for (i = 1; i <= face->glyph->bitmap_left; i++)

{

printf("_");

}

for (k = 0; k < face->glyph->bitmap.pitch; k++)

{

temp = face->glyph->bitmap.buffer[face->glyph->bitmap.pitch*(j + face->glyph->bitmap_top - (font_size * 26) / 32) + k];

for (counter = 0; counter < 8; counter++)

{

if (temp & 0x80)

{

printf("*");

}

else

{

printf("_");

}

temp <<= 1;

i++;

if (i > font_size)

{

break;

}

}

}

for (; i <= font_size; i++)

{

// printf("|");

}

printf("\n");

}

for (; j < font_size; j++)

{

for (i = 0; i < font_size; i++)

{

printf("_");

}

printf("\n");

}

return 0;

}