在区域内绘制宽字符串多行自动换行的c语言实现方法

来源：互联网发布：网络用语2017最新骂人编辑：程序博客网时间：2024/05/05 19:26

static WCHAR wm_drawstring[1200];
static WCHAR wm_drawstringDeco[40][40];
static int wm_totallines;

//用来计算行数的
static    WCHAR mydrawstring[1200];
static    WCHAR wtmpstring[1200];
static    WCHAR strdec[40][40];

static int count_oneline_word_num(WCHAR * string,int countperline,int clipw,unsigned char * bover)
{
    int i,w;
    WCHAR str[80];
    int len = countperline;
    memset(str,NULL,20);
    wstrncpy(str,string,len);
    * bover = FALSE;
    for (i = 0;i < 20;i ++)
    {
        if ((w = vm_graphic_get_string_width(str)) <= clipw)
        {
            memset(str,NULL,20);
            wstrncpy(str,string,len + i);
            if(* (string + len + i - 1) == NULL)
            {
                * bover = TRUE;
                return countperline + i - 1;
            }
        }
        else
        {
            return countperline + i - 1 - 1;
        }
    }
    return len;
}

static void DecodeWstring(WCHAR * string,int clipw)
{
    char str[40];
    WCHAR wtmpstringtemp[1200] = {0};
    WCHAR * wtmpstring1p = wtmpstringtemp;
    int w = 0;
    int onerow_wordnum = 0;
    int strLen = 0;
    int countperline = 0,totallines = 0,i = 0,j = 0;
    unsigned char bover = FALSE;

    WCHAR * ret;
    for (i = 0; i < 40; i++)
        for (j = 0; j < 40; j++)
            wm_drawstringDeco[i][j] = 0;

        strLen = wstrlen((wchar_t *)string);
        wm_totallines = 0;
        wstrcpy(wtmpstringtemp,string);
        wstrcpy(wm_drawstring,wtmpstringtemp);
        ret = my_ucs2_string("围");
        w = vm_graphic_get_string_width (ret);
        countperline = clipw / w;
        totallines = vm_graphic_get_string_width(wtmpstringtemp) / clipw +     ((vm_graphic_get_string_width(wtmpstring) % clipw > 0)?1:0);
        /*临时总行数多加1*/
        totallines += 1;

        for(i = 0; i < totallines; i ++)
        {
            wm_totallines ++;
            if(strLen > countperline)
            {
                onerow_wordnum = count_oneline_word_num(wtmpstring1p,countperline,clipw,&bover);
                wstrncpy(wm_drawstringDeco[i],wtmpstring1p,onerow_wordnum);
                vm_ucs2_to_gb2312(str,40,wm_drawstringDeco[i]);
                vm_ucs2_to_gb2312(str,40,wtmpstring1p);
                wm_drawstringDeco[i][onerow_wordnum] = '\0';
                wtmpstring1p += onerow_wordnum;
                strLen -= onerow_wordnum;
                if(bover)
                {
                    break;
                }
            }
            else
            {
                wstrncpy(wm_drawstringDeco[i],wtmpstring1p,strLen);
                wm_drawstringDeco[i][strLen] = '\0';
                break;
            }
        }
}
void drawWstring(WCHAR * string,int x, int y)
{
    int w = 0,strLen = 0;
    w = vm_graphic_get_string_width(string);
    strLen = wstrlen((wchar_t *)string)*2;
    vm_graphic_drawtext(x,y,string,strLen,VRE_COLOR(0xffffff));
}
void drawWstringEx(WCHAR * string,int x, int y, int clipx, int clipy, int clipw, int cliph)
{
    int i;
    int h;
    h = vm_graphic_get_character_height();
    h = h+LINEDISTANCE;

    if(wstrcmp(wm_drawstring,string) != 0)
    {
        DecodeWstring(string,clipw);
    }

    for(i = 0; i < wm_totallines; i ++)
    {
        if( y + i * h >= clipy && y + i * h <= clipy + cliph - h)
        {
            drawWstring(wm_drawstringDeco[i],x,y + i * h);
        }
    }
}