楼主 #1 2018-08-11 14:06:10 分享评论
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- 晕哥
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楼主 #8 2018-10-27 08:06:06 分享评论
楼主 #12 2018-12-25 08:55:03 分享评论
- 晕哥
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Re: @assert 分享的在littlevgl 调用freetye显示文字, 而不用通过字模软件生成
http://bbs.21ic.com/icview-586134-1-1.html
今天发现了Freetype与文件系统相关的接口定义
在ftstdlib.h 这个头中#include <string.h>
#define ft_memchr memchr
#define ft_memcmp memcmp
#define ft_memcpy memcpy
#define ft_memmove memmove
#define ft_memset memset
#define ft_strcat strcat
#define ft_strcmp strcmp
#define ft_strcpy strcpy
#define ft_strlen strlen
#define ft_strncmp strncmp
#define ft_strncpy strncpy
#define ft_strrchr strrchr
#define ft_strstr strstr
这些是内存管理#include <stdio.h>
#define FT_FILE FILE
#define ft_fclose fclose
#define ft_fopen fopen
#define ft_fread fread
#define ft_fseek fseek
#define ft_ftell ftell
#define ft_sprintf sprintf
这些是输入输出的接口个人感觉，需要移植的接口就是以上内容，现在的问题是要如何将那些源码加载到工程中
尽管我在Docs文件加下打开了一个叫做INSTALL.any的文件
里面提示了如何添加源码，但是我按照其操作依然错误很多，有些想放弃了。
* DO NOT COMPILE ALL C FILES! Rather, compile the following ones.-- base components (required)
src/base/ftsystem.c
src/base/ftinit.c
src/base/ftdebug.csrc/base/ftbase.c
src/base/ftbbox.c -- recommended, see <freetype/ftbbox.h>
src/base/ftglyph.c -- recommended, see <freetype/ftglyph.h>src/base/ftbdf.c -- optional, see <freetype/ftbdf.h>
src/base/ftbitmap.c -- optional, see <freetype/ftbitmap.h>
src/base/ftcid.c -- optional, see <freetype/ftcid.h>
src/base/ftfstype.c -- optional
src/base/ftgasp.c -- optional, see <freetype/ftgasp.h>
src/base/ftgxval.c -- optional, see <freetype/ftgxval.h>
src/base/ftlcdfil.c -- optional, see <freetype/ftlcdfil.h>
src/base/ftmm.c -- optional, see <freetype/ftmm.h>
src/base/ftotval.c -- optional, see <freetype/ftotval.h>
src/base/ftpatent.c -- optional
src/base/ftpfr.c -- optional, see <freetype/ftpfr.h>
src/base/ftstroke.c -- optional, see <freetype/ftstroke.h>
src/base/ftsynth.c -- optional, see <freetype/ftsynth.h>
src/base/fttype1.c -- optional, see <freetype/t1tables.h>
src/base/ftwinfnt.c -- optional, see <freetype/ftwinfnt.h>
src/base/ftxf86.c -- optional, see <freetype/ftxf86.h>src/base/ftmac.c -- only on the Macintosh
-- font drivers (optional; at least one is needed)
src/bdf/bdf.c -- BDF font driver
src/cff/cff.c -- CFF/OpenType font driver
src/cid/type1cid.c -- Type 1 CID-keyed font driver
src/pcf/pcf.c -- PCF font driver
src/pfr/pfr.c -- PFR/TrueDoc font driver
src/sfnt/sfnt.c -- SFNT files support
(TrueType & OpenType)
src/truetype/truetype.c -- TrueType font driver
src/type1/type1.c -- Type 1 font driver
src/type42/type42.c -- Type 42 font driver
src/winfonts/winfnt.c -- Windows FONT / FNT font driver-- rasterizers (optional; at least one is needed for vector
formats)src/raster/raster.c -- monochrome rasterizer
src/smooth/smooth.c -- anti-aliasing rasterizer-- auxiliary modules (optional)
src/autofit/autofit.c -- auto hinting module
src/cache/ftcache.c -- cache sub-system (in beta)
src/gzip/ftgzip.c -- support for compressed fonts (.gz)
src/lzw/ftlzw.c -- support for compressed fonts (.Z)
src/gxvalid/gxvalid.c -- TrueTypeGX/AAT table validation
src/otvalid/otvalid.c -- OpenType table validation
src/psaux/psaux.c -- PostScript Type 1 parsing
src/pshinter/pshinter.c -- PS hinting module
src/psnames/psnames.c -- PostScript glyph names supportNotes:
`ftcache.c' needs `ftglyph.c'
`ftfstype.c' needs `fttype1.c'
`ftglyph.c' needs `ftbitmap.c'
`ftstroke.c' needs `ftglyph.c'
`ftsynth.c' needs `ftbitmap.c'`cff.c' needs `sfnt.c', `pshinter.c', and `psnames.c'
`truetype.c' needs `sfnt.c' and `psnames.c'
`type1.c' needs `psaux.c' `pshinter.c', and `psnames.c'
`type1cid.c' needs `psaux.c', `pshinter.c', and `psnames.c'
`type42.c' needs `truetype.c'
感觉把下面这些接口实现了就可以操作 freetype了, 21ic 上面有朋友把fatfs弄上去整合就可以用了:
#define ft_fclose fclose
#define ft_fopen fopen
#define ft_fread fread
#define ft_fseek fseek
#define ft_ftell ftell
#define ft_sprintf sprintf
这些是输入输出的接口
14楼:
经过三个晚上的努力终于在stm32+ucgui+sdio上成功移植FreeType2，下面是几张照片，字库是从电脑上拷贝的SIMFANG.TTF
文件系统用的是Fatfs，不过FreeType2需要开辟很大的堆空间，目前还没找到好的优化方法，移植了个FT2，ucgui我只分配了5K的动态内存，
还带旋转:
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楼主 #15 2019-01-14 21:57:26 分享评论
- 晕哥
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Re: @assert 分享的在littlevgl 调用freetye显示文字, 而不用通过字模软件生成
/**
* @file lv_freetype.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_freetype.h"
#include "lv_font.h"
#include <wchar.h>
#include <pthread.h>
static pthread_mutex_t ft_mutex = PTHREAD_MUTEX_INITIALIZER;
/**
* Freetype2 set fonts size
*/
uint8_t lv_font_size(uint8_t sz)
{
static uint8_t size=0;
if( 0 == sz || size == sz ) {
// printf("[debug] size = %d\n", size);
return size;
}
pthread_mutex_lock( &ft_mutex);
size = sz;
FT_Set_Pixel_Sizes( lv_font_freetype2.handle.face, size, 0 );
pthread_mutex_unlock( &ft_mutex);
// printf("[debug] size = %d\n", size);
return size;
}
/**
* Initialize the built-in fonts
*/
void lv_font_init_freetype2(char *fontname)
{
int error;
if( fontname == NULL )
return ;
pthread_mutex_lock( &ft_mutex);
lv_font_freetype2.handle.ft_path = fontname;
printf("%s < %s\n", __func__, lv_font_freetype2.handle.ft_path);
error = FT_Init_FreeType( &lv_font_freetype2.handle.library ); /* initialize library */
error = FT_New_Face( lv_font_freetype2.handle.library, lv_font_freetype2.handle.ft_path, 0, &lv_font_freetype2.handle.face );
pthread_mutex_unlock( &ft_mutex);
lv_font_size(24);
}
/**
* Generic bitmap get function used in 'font->get_bitmap' when the font contains all characters in the range
* @param font pointer to font
* @param unicode_letter an unicode letter which bitmap should be get
* @return pointer to the bitmap or NULL if not found
*/
static uint32_t last_letter = 0;
const uint8_t * lv_font_get_bitmap_freetype2(const lv_font_t * font, uint32_t unicode_letter)
{
pthread_mutex_lock( &ft_mutex);
FT_GlyphSlot slot;
int error;
slot = lv_font_freetype2.handle.face->glyph;
if( last_letter == unicode_letter ) {
lv_font_freetype2.handle.top = slot->bitmap_top;
pthread_mutex_unlock( &ft_mutex);
// printf("%x [ %c%c%c ] < top %d left %d row %d col %d >\n", unicode_letter, unicode_letter&0xff, unicode_letter>>8, unicode_letter>>16, slot->bitmap_top, slot->bitmap_left, slot->bitmap.rows, slot->bitmap.width);
return slot->bitmap.buffer;
}
last_letter = unicode_letter;
error = FT_Load_Char( lv_font_freetype2.handle.face, unicode_letter, FT_LOAD_RENDER );
if (error)
{
printf("FT_Load_Char error\n");
pthread_mutex_unlock( &ft_mutex);
return NULL;
}
lv_font_freetype2.handle.top = slot->bitmap_top;
pthread_mutex_unlock( &ft_mutex);
return slot->bitmap.buffer;
}
/**
* Generic glyph width get function used in 'font->get_width' when the font contains all characters in the range
* @param font pointer to font
* @param unicode_letter an unicode letter which width should be get
* @return width of the gylph or -1 if not found
*/
const int16_t lv_font_get_width_freetype2(const lv_font_t * font, uint32_t unicode_letter)
{
pthread_mutex_lock( &ft_mutex);
FT_GlyphSlot slot;
int error;
slot = lv_font_freetype2.handle.face->glyph;
if( last_letter == unicode_letter ) {
pthread_mutex_unlock( &ft_mutex);
if( slot->bitmap.width == 0 ) {
if( unicode_letter == 0x09 )
return lv_font_size(0)*2;
else
return lv_font_size(0)/2;
}
return slot->bitmap.width;
}
last_letter = unicode_letter;
error = FT_Load_Char( lv_font_freetype2.handle.face, unicode_letter, FT_LOAD_RENDER );
if (error)
{
printf("FT_Load_Char error\n");
pthread_mutex_unlock( &ft_mutex);
return 0;
}
// for get rows
lv_font_freetype2.h_px = lv_font_size(0); // slot->bitmap.rows;
lv_font_freetype2.bpp = 8;
pthread_mutex_unlock( &ft_mutex);
if( slot->bitmap.width == 0 ) {
if( unicode_letter == 0x09 )
return lv_font_size(0)*2;
else
return lv_font_size(0)/2;
}
return slot->bitmap.width;
}
lv_font_t lv_font_freetype2 = {
.unicode_first = 0, /*First Unicode letter in this font*/
.unicode_last = 0, /*Last Unicode letter in this font*/
.h_px = 0, /*Font height in pixels*/
.glyph_bitmap = NULL, /*Bitmap of glyphs*/
.glyph_dsc = NULL, /*Description of glyphs*/
.unicode_list = NULL, /*Every character in the font from 'unicode_first' to 'unicode_last'*/
.get_bitmap = lv_font_get_bitmap_freetype2, /*Function pointer to get glyph's bitmap*/
.get_width = lv_font_get_width_freetype2, /*Function pointer to get glyph's width*/
.bpp = 8, /*Bit per pixel*/
.type = FONT_TYPE_BUILT_FREETYPE2,
.handle.ft_size = lv_font_size,
.next_page = NULL, /*Pointer to a font extension*/
};以上是 @assert 发给我的release_static_freetype.c 代码.
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楼主 #22 2019-01-17 17:25:24 分享评论
- 晕哥
- 管理员
- 注册时间： 2017-09-06
- 已发帖子： 9,342
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Re: @assert 分享的在littlevgl 调用freetye显示文字, 而不用通过字模软件生成
static const uint8_t*
lv_font_get_bitmap_freetype(const struct _lv_font_struct *font, uint32_t unicode_letter)
{
return bitmap;
}static int16_t
lv_font_get_width_freetype(const struct _lv_font_struct *font, uint32_t unicode_letter)
{
/*Check the range*/
if(unicode_letter < font->unicode_first || unicode_letter > font->unicode_last) return -1;
FT_Error err = FT_Load_Char(face, unicode_letter, FT_LOAD_RENDER);
if (err == 0) {
lv_font_freetype.bpp = 8;
lv_font_freetype.bitmap_dx = face->glyph->bitmap_left;
lv_font_freetype.bitmap_dy = lv_font_freetype.monospace - face->glyph->bitmap_top;
lv_font_freetype.bitmap_row = face->glyph->bitmap.rows;
bitmap = face->glyph->bitmap.buffer;
return face->glyph->bitmap.width;
}bitmap = NULL;
return -1;
}代码很简单的，但是修改了部分的LV代码
非常感谢分享！
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