交叉编译:
tar xjf freetype-2.4.10.tar.bz2
./configure --host=arm-linux
make
make DESTDIR=$PWD/tmp install
find -name stdio.h
平时使用#include<stdio.h>路径 ./arm-linux/include/stdio.h
编译出来的头文件应该放入:
/work/tools/gcc-3.4.5-glibc-2.3.6/arm-linux/include
编译出来的库文件应该放入:
/work/tools/gcc-3.4.5-glibc-2.3.6/arm-linux/lib
把tmp/usr/local/lib/* 复制到 /work/tools/gcc-3.4.5-glibc-2.3.6/arm-linux/lib
sudo cp * /work/tools/gcc-3.4.5-glibc-2.3.6/arm-linux/lib -d -rf
cp *so* /work/nfs_root/fs_mini_mdev_new/lib –d
cd /work/tools/gcc-3.4.5-glibc-2.3.6/arm-linux/lib
把tmp/usr/local/include/* 复制到 /work/tools/gcc-3.4.5-glibc-2.3.6/arm-linux/include
cp * /work/tools/gcc-3.4.5-glibc-2.3.6/arm-linux/include -rf
cp *so* /work/nfs_root/fs_mini_mdev/lib –d
错误
/arm-linux/include/ft2build.h:56:38: freetype/config/ftheader.h
freetype/config/ftheader.h
freetype2/freetype/config/ftheader.h
将freetype2/freetype移动到当前目录
mv freetype2/freetype .
编译
arm-linux-gcc -finput-charset=GBK -fexec-charset=GBK -o example1 example1.c -lfreetype -lm
在开发板上运行
用函数转化文件编码方式
iconv -f GBK -t UTF-8 show_font.c
查看错误
编译
arm-linux-gcc -finput-charset=GBK -fexec-charset=GBK -o show_font show_font.c -lfreetype -lm
wchar_t * chinese_str = L"陈"; FT_Library library;
FT_Face face;
FT_Vector pen; /* untransformed origin */
FT_GlyphSlot slot; int error; if(argc != )
{
printf("Usage : %s <font_file>\n",argv[]);
return -;
}
freetype初始化
/* ÏÔʾʸÁ¿ÎÄ×Ö */ error = FT_Init_FreeType( &library ); /* initialize library */
/* error handling omitted */ error = FT_New_Face( library, argv[], , &face ); /* create face object */
/* error handling omitted */ slot = face->glyph; FT_Set_Pixel_Sizes(face, , ); /*È·¶¨×ø±ê
*lcd_x = var.xres / 2 + 32 + 32
*lcd_y = var.yres / 2
*µÑ¿¨¶û×ø±ê
*x = lcd_x = var.xres / 2 + 32 + 32
*y = var.yres - var.yres / 2
*/ pen.x = ( var.xres / + + ) * ;
pen.y = ( var.yres - var.yres / - ) * ; /* set transformation */
FT_Set_Transform( face, , &pen ); /* load glyph image into the slot (erase previous one) */ error = FT_Load_Char( face, chinese_str[], FT_LOAD_RENDER );
if ( error )
{
printf("FT_Load_Char error\n");
return -;
}
/* now, draw to our target surface (convert position) */
draw_bitmap( &slot->bitmap,
slot->bitmap_left,
var.yres - slot->bitmap_top );
描画图
void draw_bitmap( FT_Bitmap* bitmap,
FT_Int x,
FT_Int y)
{
FT_Int i, j, p, q;
FT_Int x_max = x + bitmap->width;
FT_Int y_max = y + bitmap->rows; printf("x = %d, y = %d\n", x, y); for ( i = x, p = ; i < x_max; i++, p++ )
{
for ( j = y, q = ; j < y_max; j++, q++ )
{
if ( i < || j < ||
i >= var.xres || j >= var.yres )
continue; // image[j][i] |= bitmap->buffer[q * bitmap->width + p]; lcd_put_pixel(i, j, bitmap->buffer[q * bitmap->width + p]);
}
}
}
旋转angle角度
第三个参数为角度
添加头文件 #include <stdlib.h>
angle = ( 1.0 * strtoul(argv[], NULL, ) / ) * 3.14159 * ; /* use 25 degrees */ /* set up matrix */
matrix.xx = (FT_Fixed)( cos( angle ) * 0x10000L );
matrix.xy = (FT_Fixed)(-sin( angle ) * 0x10000L );
matrix.yx = (FT_Fixed)( sin( angle ) * 0x10000L );
matrix.yy = (FT_Fixed)( cos( angle ) * 0x10000L );