Show UTF-8 human readable strings from source code to your tiny LCD via u8glib
This is a language patch for U8G lib. The original u8g support partially the char display of multi-language by re-coding the char values due to large size of font data and limited memory/flash of embedded systems. It's very inconviniant to update the firmware if there's (menu) message changed by recoding all these added message chars. What if we get all these steps done with the human readable messages in source code and processed by automatical tools while keep the compiled firmware as small as previous releases? This patch will release the programmer from the bad experiences.
Basically, this tool will scan the source code of the firmware which using u8g lib, pick up the message strings tagged with "_U8GT()", and then genrate all of font data structures and save it in .h files for u8g.
The firmware developer now can use plain text in their language source code and regenerate the langauge files once they change the message strings tagged with "_U8GT()" before compiling the souce code. They should use the updated drawStr() function or utf8_draw() to display the strings.
The first step is to compile the program in the folder tools, make sure genpages is compiled successfully.
include the file in your source code:
#include "fontutf8-data.h"
init the font data in setup() function
u8g_SetUtf8Fonts1 (g_fontinfo, NUM_ARRAY(g_fontinfo));
declare all of the string in macro _U8GT(), for example:
char s[] = _U8GT("黄沙百戰穿金甲，不破樓蘭終不還。");
// and draw the string:
u8g_DrawUtf8Str1 (u8g.getU8g(), 3, 30, s);
Prepare BDF font files, you may download a font from WQY, for example: http://wenq.org/daily/wqy-bitmapfont-bdf-gb18030-nightly_build.tar.gz
tar -xvf wqy-bitmapfont-bdf-gb18030-nightly_build.tar.gz
cp wqy-bitmapfont-gb18030/wenquanyi_12pt.bdf tools/
generate the font file fontutf8-data.h
cd your_src
../tools/genpages.sh ../tools/wenquanyi_12pt.bdf
You may want to take a look the example fontutf8test for the details.
U8GLIB 是一个能在低配置系统中控制显示屏的库，但其中对字体的处理却很有局限性,对非ASCII非常繁琐.
这个项目就是为了将程序员从该恶梦中拯救出来。
通过脚本 tools/genpages.sh, 将程序C代码中UTF8字符串扫描出来，然后转换非ASCII字符成字体数据保存到 fontutf8-data.h. 用户在程序中包含该文件，然后在程序中调用u8g_DrawUtf8Str1()将字符串绘出.
第一步先确保在目录tools下编译好可执行文件 genpages.
然后在你的源代码中包含:
#include "fontutf8-data.h"
在setup()函数中初始化字体数据:
u8g_SetUtf8Fonts1 (g_fontinfo, NUM_ARRAY(g_fontinfo));
将所有UTF8字符串用宏 _U8GT() 包含起来，如:
char s[] = _U8GT("黄沙百戰穿金甲，不破樓蘭終不還。");
// 可以使用 u8g_DrawUtf8Str1() 绘出字符串
u8g_DrawUtf8Str1 (u8g.getU8g(), 3, 30, s);
准备字体文件，如: http://wenq.org/daily/wqy-bitmapfont-bdf-gb18030-nightly_build.tar.gz
tar -xvf wqy-bitmapfont-bdf-gb18030-nightly_build.tar.gz
cp wqy-bitmapfont-gb18030/wenquanyi_12pt.bdf tools/
然后在你的源代码目录下执行如下命令来生成 fontutf8-data.h
cd your_src
../tools/genpages.sh ../tools/wenquanyi_12pt.bdf
具体例子参见fontutf8test.