山豆兒的Blog: 簡單取得PSD長寬

2007/05/26

簡單取得PSD長寬

PSD的讀取參考了幾個地方發現有讀取 8BIM 跟 8BPS 的不太一樣

8BIM是讀取資源內容
8BPS是檔頭判斷
以下是程式碼，請參考


bool GetPsdWidthHeight(const wxChar* buf,int size,int&Width,int& Height,bool& ReadWidthHeight)
{
    char Head[5];
    memcpy(&Head,&buf[0],sizeof(wxChar)*4);

    if(strncmp( Head, "8BPS", 4 ))
    {
        ReadWidthHeight=true;
        return false;
    }

    int check=(BYTE)buf[4]<<8 | (BYTE)buf[5];

    if (check != 1)
    {
        ReadWidthHeight=true;
        return false;
    }

    //Read32; 6 7 8 9  
 //Read16; 10 11

    unsigned channel_count = (BYTE)buf[12]<<8 | (BYTE)buf[13];

    if( channel_count >= 0 && channel_count <= 16)
    {
  Height = (BYTE)buf[14]<<24 | (BYTE)buf[15]<<16 | (BYTE)buf[16]<<8 | (BYTE)buf[17];
  Width = (BYTE)buf[18]<<24 | (BYTE)buf[19]<<16 | (BYTE)buf[20]<<8 | (BYTE)buf[21];

        ReadWidthHeight=true;
        return true;
    }

    return false;

}