DM36x IPNC OSD显示中文 --- 基本数据准备篇

int save_bmp24(char * filename,int width,int height,unsigned char *data)
{
FileHead bmp_head;
Infohead bmp_info;
int size = width*height*;
FILE *fp = fopen(filename,"wb");
if(!fp)
{
perror("open file error");
return -;
} bmp_head.bfType=0x4d42;
bmp_head.bfSize=size+sizeof(FileHead)+sizeof(Infohead);//24+head+info no quad
bmp_head.bfReserved1=bmp_head.bfReserved2=;
bmp_head.bfOffBits=bmp_head.bfSize-size; bmp_info.biSize=;
bmp_info.biWidth=width;
bmp_info.biHeight=-height;//如果为正数,转换出来的图片还需要进行垂直翻转
bmp_info.biPlanes=;
bmp_info.biBitCount = ;
bmp_info.biCompress=;
bmp_info.biSizeImage=size;
bmp_info.biXPelsPerMeter=;
bmp_info.biYPelsPerMeter=;
bmp_info.biClrUsed=;
bmp_info.biClrImportant=; fwrite(&bmp_head,,sizeof(FileHead),fp);
fwrite(&bmp_info,,sizeof(Infohead),fp);
fwrite(data,,size,fp);
fclose(fp);
return ;
}

int convert(const char * font_file,int font_width,int font_height)
{
FT_Library library = NULL;
FT_Face face = NULL;
int error;
int char_index;
int char_code; unsigned char * bmpdata = NULL,*pdata;//保存一个字的图片数据
int isVert = ;//是否垂直布局,中文为垂直布局
FT_Bitmap *ft_bmp; unsigned short unicode;//用于存储unicode
int index=;
int area,location;
char testfilename[]; unsigned char *image = NULL, *pimage;//一个区转换为一张图片
int temp; if(font_width <= && font_height <= )
{
printf("invalidate font size.\n");
return -;
}
if(font_width <= )
font_width = font_height;
if(font_height <= )
font_height = font_width;
if(font_width % )//4字节对齐,这里先保证宽度为4pixel对齐
{
printf("invalidate font size.\n");
return -;
}
setlocale(LC_ALL,"zh_CN.UTF-8"); do
{
//下面开始初始化FT2库
error = FT_Init_FreeType(&library);
if (error)
{
printf("can not init free type library!\n");
break;
} error = FT_New_Face(library, font_file, , &face);
if (error)
{
printf("create new face falied!\n");
break;
}
isVert = FT_HAS_VERTICAL(face);
error = FT_Set_Pixel_Sizes(face, font_width, font_height);//设置字体大小
if (error)
{
printf("set font size error!\n");
break;
}
bmpdata = malloc(font_width * font_height * );
if(!bmpdata)
{
printf("outof memory.\n");
break;
}
image = malloc( * font_width * font_height * );//这里要求font_size必须为偶数
if(!image)
{
printf("outof memory.\n");
break;
} #if 0
//打印字体相关信息
printf("file has %d faces\n", face->num_faces);
printf("%s italic or oblique,%s bold\n", face->style_flags & FT_STYLE_FLAG_ITALIC ?"support":"not support",face->style_flags & FT_STYLE_FLAG_BOLD ?"support":"not support");
printf("file family name %s\n", face->family_name);
printf("file style name %s\n", face->style_name);
printf("face index %d\n", face->face_index);
printf("number of char %d\n", face->num_glyphs);
printf("number of fixed bitmap %d\n", face->num_fixed_sizes);
printf("Char size %d\n", face->size);
printf("has %d fixed sizes\n",face->num_fixed_sizes);
for(i=;i<face->num_fixed_sizes;i++)
{
printf("supported size %d:width=%d,heigh=%d\n",i+,face->available_sizes[i].width,face->available_sizes[i].height);
}
#endif
error = FT_Select_Charmap(face,FT_ENCODING_UNICODE);//这里使用UNICODE映射表,便于使用UNICODE码(char code)来获取char index
if(error)
{
printf("select char map error.\n");
break;
}
//printf("code %x\n",face ->charmap ->encoding);
switch(face ->charmap ->encoding)
{
case FT_ENCODING_MS_GB2312: printf("USE GB2312 CODE\n");break;
case FT_ENCODING_MS_BIG5: printf("USE BIG5 CODE\n");break;
case FT_ENCODING_UNICODE: printf("USE UNICODE CODE\n");break;
default:
printf("UNKNOWN CODE\n");
goto done;
break;
} //实际有字体的区码为(0-8) (15-86)区(区号从0开始 ) = 9 + 72 = 81个区
for(area = ;area < ;area ++)//1- 87区
{
if( (area > && area < )/* 8 - 15区跳过*/
||(area > && area < )/* 87 - 94 区跳过*/
)
{
continue;
}
memset(image,, * font_width * font_height * );
pimage = image;
for(location = ;location < ;location++)//1 - 94位
{
index = area * + location;
if(Gb2312ToUnicode(gb2312_table[index],&unicode) < )
{
printf("get unicode code error.gb2312 code 0x%04X\n",gb2312_table[index]);
continue;
}
char_code = unicode;
if(!char_code)
{
printf("\ninvalidate char code.\n");
continue;
}
char_index = FT_Get_Char_Index(face,char_code);
error = FT_Load_Glyph(face, char_index, FT_LOAD_DEFAULT | FT_LOAD_MONOCHROME);
if (error)
{
printf("\nload char error!\n");
goto done;
}
if (face->glyph->format != FT_GLYPH_FORMAT_BITMAP)
{
error = FT_Render_Glyph(face->glyph, FT_RENDER_MODE_MONO);
if (error)
{
printf("\nrender char failed!\n");
goto done;
}
} /*
单色位图图像数据的表示方法:
在单色位图图像中，只有两种颜色，黑色或白色，每一个像素只需要一个比特就能够完成表示，为了清楚比特0或1具体表示哪一种颜色，可以通过查询调色板。
在单色位图图像中，调色板只包含两种颜色，每一种颜色用R G B 0 四个字节表示 （在实际的字节流中，顺序是 B G R 0）
所以，位图图像数据中的0 代表调色板中 第一种颜色的颜色值， 1 代表调色板中 第二种颜色的颜色值。
一行单色位图数据的存储格式规定：
每一扫描行的字节数必需是4的整倍数，当不够4的整数倍时，需要加0补齐
以 720 × 450 的单色位图图像为例
水平扫描行的长度为720，则需要720比特来表示一个扫描行，即需要 720/8=90字节来表示，但是 90不是 4 的整数倍，因此需要用0补齐，直至为4的整数倍，即需要额外的2个填充字节。
最终，长度为720的水平扫描行使用了 92 个字节来表示。
NOTE:非8位位图可用函数FT_Bitmap_Convert进行转换
*/
//转换为4字节对齐
ft_bmp = &face->glyph->bitmap;
#if 0
//dump位图信息
printf("bit_map_left %d bit_map_top %d\n", face->glyph->bitmap_left,face->glyph->bitmap_top);
printf("int rows:%d\n",ft_bmp ->rows);
printf("int width:%d\n",ft_bmp ->width);
printf("int pitch:%d\n",ft_bmp ->pitch);
printf("short num_grays:%d\n",ft_bmp ->num_grays);
printf("char pixel_mode:%d\n",ft_bmp ->pixel_mode);
if(isVert)
{
printf("VERT:(w:%ld h:%ld)(bearingX:%ld bearingY:%ld Advance:%ld)\n",face->glyph->metrics.width/,face->glyph->metrics.height/,
face->glyph->metrics.vertBearingX/,face->glyph->metrics.vertBearingY/,face->glyph->metrics.horiAdvance/);
}
else
{
printf("HORI:(w:%ld h:%ld)(bearingX:%ld bearingY:%ld Advance:%ld)\n",face->glyph->metrics.width/,face->glyph->metrics.height/,
face->glyph->metrics.horiBearingX/,face->glyph->metrics.horiBearingY/,face->glyph->metrics.vertAdvance/);
}
printf("xMin=%ld, yMin=%ld, xMax=%ld, yMax=%ld\n",face ->bbox.xMin,face ->bbox.yMin,face ->bbox.xMax,face ->bbox.yMax);
#endif switch(ft_bmp ->pixel_mode)
{
case FT_PIXEL_MODE_MONO://单色位图
{
//将数据转换到24位
int topblank = ;//字型顶部距离位图顶部空行数目
int leftblank = ;//字型左边距离位图左边空列数目
int rightblank = ;//字型右边距离位图右边空列数目
int pitch = ;//每个扫描行占用几个字节
int width = ft_bmp ->width;//实际字型宽度
int height = ft_bmp ->rows; //实际字型高度
unsigned char * ft_bmp_buff = ft_bmp ->buffer;
int i,j,k;
if(isVert)
{
topblank = face->glyph->metrics.vertBearingY/;
leftblank = font_width/ + face->glyph->metrics.vertBearingX/;
}
else
{
topblank = font_height * / - face->glyph->metrics.horiBearingY/;
leftblank = face->glyph->metrics.horiBearingX/;
}
if(topblank < )topblank = ;
if(leftblank < )leftblank = ;
rightblank = font_width - width - leftblank;
if(rightblank < )rightblank = ;
pitch = ft_bmp ->width / ;
if(pitch% ft_bmp ->pitch)
pitch = pitch + (ft_bmp ->pitch - pitch %ft_bmp ->pitch);
//printf("PITCH=%d\n",pitch); //转换1bit位图数据到24bit位图数据
printf("begin convert.area %d ----> %d\r",area,location);
memset(bmpdata,,font_width * font_height * );
pdata = bmpdata;
pdata += topblank *font_width * ;//跳过上边距
for(i=;i<height;i++)
{
pdata += leftblank * ;
k = ;
for(j=;j<width;j++)
{
if(ft_bmp_buff[j/] & ( << k) )
{
//pdata[0] = 255;//蓝
pdata[] = ;//绿
pdata[] = ;//红
}
k--;
if(k<)k=;
pdata += ;
}
ft_bmp_buff += pitch;
pdata += rightblank * ;
}
/*if(!(font_width %4))
{
sprintf(testfilename,"./testbmp/%d_%d.bmp",area,location );
printf("\nsave bmp file [%s]\n",testfilename);
if(save_bmp24(testfilename,font_width ,font_height,bmpdata))
{
printf("save bmp file [%s] error.\n",testfilename);
}
}*/ }
break;
default:
printf("位图为非单色图片.\n");
goto done;
break;
}//switch
pdata = bmpdata;
pimage = image + location * font_width * ;
for(temp=;temp<font_height;temp++)
{
memcpy(pimage,pdata,font_width * );
pdata += font_width * ;
pimage += * font_width *;
}
#ifndef _WIN32
usleep();
#else
Sleep();
#endif
}//for( 1 - 94 位 )
//保存图片
sprintf(testfilename,"./testbmp/area%d_%dx%d.bmp",area,font_width,font_height);
//printf("\nsave bmp file [%s]\n",testfilename);
if(save_bmp24(testfilename, * font_width,font_height,image))
{
printf("save bmp file [%s] error.\n",testfilename);
}
}//for( 1 - 94 区)
printf("\nConvert Done.\n"); }while ();
done:
#if 0 //出现莫名其妙的错误,注释了
fprintf(stderr,"begin cleanup.\n");
if(bmpdata)
{
free(bmpdata);
bmpdata = NULL;
}
if(image)
{
free(image);
image = NULL;
}
if(face)
{
FT_Done_Face(face);
face = NULL;
}
if(library)
{
FT_Done_FreeType(library);
library = NULL;
}
#endif
return ;
}

/*********************Y***************************/
unsigned char data_Y[]={
0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10
,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10
,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10
,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10
......
,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10
,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10
,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10
,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10
};
//37224 bytes
/**************end of Y***************************/ /********************UV***************************/
unsigned char data_UV[]={
0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80
,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80
,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80
,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80
......
,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80
,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80
,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x12,0x92,0x80,0x80,0x80,0x80
,0x80,0x80,0x80,0x80
};
//18612 bytes
/*************end of UV***************************/