#include<stdio.h>
#include <ft2build.h>
#include FT_FREETYPE_H

#define CHARSIZE 32 // 字符位图的大小设为32 * 32

int GetCharBitmap(int iCharSize, unsigned int uiCharCode);

int main()
{
    //wchar_t ch = 'b'; //英文字符
    wchar_t ch = L'总'; //中文字符
    //wchar_t ch = '你';
    /* 中文字符必须要加L，不然得不到字符索引FT_Get_Char_Index()返回0
     * FreeType默认为unicode的字符表
     * L将ANSI字符串转换成unicode的字符串
     *
     */

    GetCharBitmap(CHARSIZE, ch);

    return 0;
}

int GetCharBitmap(int iCharSize, unsigned int uiCharCode)
{
    // - 初始化FreeType对象
    FT_Library ftLibrary;
    FT_Error ftError = FT_Init_FreeType(&ftLibrary);

    if(ftError)
    {
        printf("Init freetype library fail!/n");
        return -1;
    }

    // - 从字体文件中装载一个Face
    FT_Face ftFace;
    ftError = FT_New_Face(ftLibrary,
                          "C:\\WINDOWS\\Fonts\\simhei.ttf", //黑体中文字库
                          0,
                          &ftFace);

    if(ftError == FT_Err_Unknown_File_Format)
    {
        // 表示可以打开和读此文件，但不支持此字体格式
        printf("Error! Could not support this format!/n");
        return -1;

    }
    else if(ftError) // 其他错误
    {
        printf("Error! Could not open file ukai.ttc!/n");
        return -1;
    }

    // - 设置
    ftError = FT_Set_Pixel_Sizes(ftFace, iCharSize, 0);

    if(ftError)
    {
        printf("Set pixel sizes to %d*%d error!/n", iCharSize, iCharSize);
        return -1;
    }

    // - 得到字符码的字形索引
    FT_UInt uiGlyphIndex = FT_Get_Char_Index(ftFace, uiCharCode);

    if(uiGlyphIndex<=0)
    {
        printf("未找到该字符的索引");
        return -1;
    }

    FT_Load_Glyph(ftFace, uiGlyphIndex, FT_LOAD_DEFAULT);

    // - 生成位图
    if(ftFace->glyph->format != FT_GLYPH_FORMAT_BITMAP)
    {
        FT_Render_Glyph(ftFace->glyph, FT_RENDER_MODE_MONO);
    }

    int iRow = 0, iCol = 0;

    for(iRow = 0; iRow < ftFace->glyph->bitmap.rows; iRow++)
    {
        for(iCol = 0; iCol < ftFace->glyph->bitmap.width; iCol++)
        {
            if((ftFace->glyph->bitmap.buffer[iRow * ftFace->glyph->bitmap.pitch + iCol / 8] & (0xC0 >> (iCol % 8))) == 0)
            {
                printf("1");
            }
            else
            {
                printf("0");
            }
        }

        printf("\n");
    }

    return 0;

}