agg_platform_support.cpp

windows ce 下的画各种b样条曲线

    //------------------------------------------------------------------------
    const char* platform_support::full_file_name(const char* file_name)
    {
        return file_name;
    }

    //------------------------------------------------------------------------
    bool platform_support::load_img(unsigned idx, const char* file)
    {
        if(idx < max_images)
        {
            char fn[1024];
            strcpy(fn, file);
            int len = strlen(fn);
            if(len < 4 || _stricmp(fn + len - 4, ".BMP") != 0)
            {
                strcat(fn, ".bmp");
            }
            return m_specific->load_pmap(fn, idx, &m_rbuf_img[idx]);
        }
        return true;
    }



    //------------------------------------------------------------------------
    bool platform_support::save_img(unsigned idx, const char* file)
    {
        if(idx < max_images)
        {
            char fn[1024];
            strcpy(fn, file);
            int len = strlen(fn);
            if(len < 4 || _stricmp(fn + len - 4, ".BMP") != 0)
            {
                strcat(fn, ".bmp");
            }
            return m_specific->save_pmap(fn, idx, &m_rbuf_img[idx]);
        }
        return true;
    }



    //------------------------------------------------------------------------
    bool platform_support::create_img(unsigned idx, unsigned width, unsigned height)
    {
        if(idx < max_images)
        {
            if(width  == 0) width  = m_specific->m_pmap_window.width();
            if(height == 0) height = m_specific->m_pmap_window.height();
            m_specific->m_pmap_img[idx].create(width, height, org_e(m_specific->m_bpp));
            m_rbuf_img[idx].attach(m_specific->m_pmap_img[idx].buf(), 
                                   m_specific->m_pmap_img[idx].width(),
                                   m_specific->m_pmap_img[idx].height(),
                                   m_flip_y ?
                                    m_specific->m_pmap_img[idx].stride() :
                                   -m_specific->m_pmap_img[idx].stride());
            return true;
        }
        return false;
    }


    //------------------------------------------------------------------------
    void platform_support::force_redraw()
    {
        m_specific->m_redraw_flag = true;
        ::InvalidateRect(m_specific->m_hwnd, 0, FALSE);
    }



    //------------------------------------------------------------------------
    void platform_support::update_window()
    {
        HDC dc = ::GetDC(m_specific->m_hwnd);
        m_specific->display_pmap(dc, &m_rbuf_window);
        ::ReleaseDC(m_specific->m_hwnd, dc);
    }


    //------------------------------------------------------------------------
    void platform_support::on_init() {}
    void platform_support::on_resize(int sx, int sy) {}
    void platform_support::on_idle() {}
    void platform_support::on_mouse_move(int x, int y, unsigned flags) {}
    void platform_support::on_mouse_button_down(int x, int y, unsigned flags) {}
    void platform_support::on_mouse_button_up(int x, int y, unsigned flags) {}
    void platform_support::on_key(int x, int y, unsigned key, unsigned flags) {}
    void platform_support::on_ctrl_change() {}
    void platform_support::on_draw() {}
    void platform_support::on_post_draw(void* raw_handler) {}
}




namespace agg
{
    // That's ridiculous. I have to parse the command line by myself
    // because Windows doesn't provide a method of getting the command
    // line arguments in a form of argc, argv. Of course, there's 
    // CommandLineToArgv() but first, it returns Unicode that I don't
    // need to deal with, but most of all, it's not compatible with Win98.
    //-----------------------------------------------------------------------
    class tokenizer
    {
    public:
        enum sep_flag
        {
            single,
            multiple,
            whole_str
        };

        struct token
        {
            const char* ptr;
            unsigned    len;
        };

    public:
        tokenizer(const char* sep, 
                  const char* trim=0,
                  const char* quote="\"",
                  char mask_chr='\\',
                  sep_flag sf=multiple);

        void  set_str(const char* str);
        token next_token();

    private:
        int  check_chr(const char *str, char chr);

    private:
        const char* m_src_string;
        int         m_start;
        const char* m_sep;
        const char* m_trim;
        const char* m_quote;
        char        m_mask_chr;
        unsigned    m_sep_len;
        sep_flag    m_sep_flag;
    };



    //-----------------------------------------------------------------------
    inline void tokenizer::set_str(const char* str) 
    { 
        m_src_string = str; 
        m_start = 0;
    }


    //-----------------------------------------------------------------------
    inline int tokenizer::check_chr(const char *str, char chr)
    {
        return int(strchr(str, chr));
    }


    //-----------------------------------------------------------------------
    tokenizer::tokenizer(const char* sep, 
                         const char* trim,
                         const char* quote,
                         char mask_chr,
                         sep_flag sf) :
        m_src_string(0),
        m_start(0),
        m_sep(sep),
        m_trim(trim),
        m_quote(quote),
        m_mask_chr(mask_chr),
        m_sep_len(sep ? strlen(sep) : 0),
        m_sep_flag(sep ? sf : single)
    {
    }


    //-----------------------------------------------------------------------
    tokenizer::token tokenizer::next_token()
    {
        unsigned count = 0;
        char quote_chr = 0;
        token tok;

        tok.ptr = 0;
        tok.len = 0;
        if(m_src_string == 0 || m_start == -1) return tok;

        register const char *pstr = m_src_string + m_start;

        if(*pstr == 0) 
        {
            m_start = -1;
            return tok;
        }

        int sep_len = 1;
        if(m_sep_flag == whole_str) sep_len = m_sep_len;

        if(m_sep_flag == multiple)
        {
            //Pass all the separator symbols at the begin of the string
            while(*pstr && check_chr(m_sep, *pstr)) 
            {
                ++pstr;
                ++m_start;
            }
        }

        if(*pstr == 0) 
        {
            m_start = -1;
            return tok;
        }

        for(count = 0;; ++count) 
        {
            char c = *pstr;
            int found = 0;

            //We are outside of qotation: find one of separator symbols
            if(quote_chr == 0)
            {
                if(sep_len == 1)
                {
                    found = check_chr(m_sep, c);
                }
                else
                {
                    found = strncmp(m_sep, pstr, m_sep_len) == 0; 
                }
            }

            ++pstr;

            if(c == 0 || found) 
            {
                if(m_trim)
                {
                    while(count && 
                          check_chr(m_trim, m_src_string[m_start]))
                    {
                        ++m_start;
                        --count;
                    }

                    while(count && 
                          check_chr(m_trim, m_src_string[m_start + count - 1]))
                    {
                        --count;
                    }
                }

                tok.ptr = m_src_string + m_start;
                tok.len = count;

                //Next time it will be the next separator character
                //But we must check, whether it is NOT the end of the string.
                m_start += count;
                if(c) 
                {
                    m_start += sep_len;
                    if(m_sep_flag == multiple)
                    {
                        //Pass all the separator symbols 
                        //after the end of the string
                        while(check_chr(m_sep, m_src_string[m_start])) 
                        {
                            ++m_start;
                        }
                    }
                }
                break;
            }

            //Switch quote. If it is not a quote yet, try to check any of
            //quote symbols. Otherwise quote must be finished with quote_symb
            if(quote_chr == 0)
            {
                if(check_chr(m_quote, c)) 
                {
                    quote_chr = c;
                    continue;
                }
            }
            else
            {
                //We are inside quote: pass all the mask symbols
                if(m_mask_chr && c == m_mask_chr)
                {
                    if(*pstr) 
                    {
                        ++count;
                        ++pstr;
                    }
                    continue; 
                }
                if(c == quote_chr) 
                {
                    quote_chr = 0;
                    continue;
                }
            }
        }
        return tok;
    }


}



//----------------------------------------------------------------------------
int agg_main(int argc, char* argv[]);



//----------------------------------------------------------------------------
int PASCAL WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPWSTR lpszCmdLine1,
                   int nCmdShow)
{
	char lpszCmdLine[256]; 
	memset(lpszCmdLine,0,256);
	WideCharToMultiByte(CP_ACP,0,lpszCmdLine1,255,lpszCmdLine,255,NULL,FALSE);
    agg::g_windows_instance = hInstance;
    agg::g_windows_cmd_show = nCmdShow;

    char* argv_str = new char [strlen(lpszCmdLine) + 3];
    char* argv_ptr = argv_str;

    char* argv[64];
    memset(argv, 0, sizeof(argv));

    agg::tokenizer cmd_line(" ", "\"' ", "\"'", '\\', agg::tokenizer::multiple);
    cmd_line.set_str(lpszCmdLine);

    int argc = 0;
    argv[argc++] = argv_ptr;
    *argv_ptr++ = 0;

    while(argc < 64)
    {
        agg::tokenizer::token tok = cmd_line.next_token();
        if(tok.ptr == 0) break;
        if(tok.len)
        {
            memcpy(argv_ptr, tok.ptr, tok.len);
            argv[argc++] = argv_ptr;
            argv_ptr += tok.len;
            *argv_ptr++ = 0;
        }
    }

    int ret = agg_main(argc, argv);
    delete [] argv_str;

    return ret;
}