minigui:自定义字体文件的安装位置(install location for custom font)

10km

发布于 2019-05-25 20:40:52

5710

发布于 2019-05-25 20:40:52

我们的基于minigui的嵌入式系统项目中使用了True Type字体，原以以为只要把字体文件应用程序所在路径下的字体文件夹(res/font)下就可以了，但实际运行时报错了：

NEWGAL>PCXVFB: /usr/local/bin/gvfb 12695 miniStudio Emulator 240x320-16bpp.rgb565 
FONT>FT2: another error code means that the font file 
                ... could not be opened or read. or simply that it is                broken ... 
 FONT>DevFont: error in loading font ttf-simkai-rrncnn-0-0-ISO8859-1,GB2312,UTF-8 from /usr/local/share/minigui/res//font/simkai.ttf file.
FONT>FT2: another error code means that the font file 
                ... could not be opened or read. or simply that it is                broken ... 
 FONT>DevFont: error in loading font ttf-simkai-rrncnn-0-0-ISO8859-1,GB2312,UTF-8 from font/simkai.ttf file.
NEWGDI>InitGDI: Can not initialize fonts defined in section truetypefonts!

上面的错误看出，minigui在初始化的时候还是去/usr/local/share/minigui/res/font下去找字体了。为了确认minigui初始化字体时的逻辑，查看了代码,下面是libminigui-3.2.0/src/font/devfont.c中的init_or_term_specifical_fonts函数的片段：

        /*add devfont*/
        if ((memres = (MEM_RES*)LoadResource (font_file, RES_TYPE_MEM_RES, 0))) {
            AddDevFont (font_name, memres->data, FALSE);
            added_num ++;
        }
        else {
            // 调用sysres_get_system_res_path获取minigui系统资源路径,组成字体资源路径font_path
            // 没有尝试从usr_res_path或pwd_res_path去寻找,
            // usr_res_path,pwd_res_path是libminigui-3.2.0/src/sysres/resmgr.c中定义的宏
            if ((0 == mg_path_joint(font_path, MAX_PATH + 1, sysres_get_system_res_path(), font_file)) 
                    && ((AddDevFont (font_name, font_path, TRUE)) == TRUE))
                added_num++;
            // 尝试从当前路径下font文件夹寻找，
            // 因为在MiniGUI.cfg中字体定义一般是这样的fontfile0=font/Courier-rr-8-13.vbf
            else if ((AddDevFont (font_name, font_file, TRUE)) == TRUE)
                added_num++;
        }