LEAD Support Forum   Resource to find answers and post technical questions about LEAD products. Search       Forums Home

Re: What's the DIB struct in C#?(Image Pro for .Net V14.0) Started by fyjin99 at 06-01-2008 22:07. Topic has 5 replies. LEAD Support Fo... » Developer » DotNet » Re: What's the DIB struct in C#?(Image Pro for .Net V14.0)

Search

06-01-2008, 22:07 fyjin99 Joined on 06-02-2008 Posts 8 What's the DIB struct in C#?(Image Pro for .Net V14.0) My LeadTools version is Image Pro for .Net V14.0 and I'm using it with C#. I want to get an image's DIB that loaded by IRasterImage. I write as below: IntPtr ptr = Image.ToDib(RasterConvertToDibType.BitmapInfoHeader);  byte[] temp = new byte[2000];  Marshal.Copy(ptr, temp, 0, 2000); The Image is IRasterImage type and loaded correctly. I checked the datas stored in the temp and I can't find the correct BitmapInfoHeader and the pixel's data. In .Net it's GDI+ and the BitmapInfoHeader is not defined. I want to konw what's the BitmapInfoHeader the LEAD used in .NET and how the pixel's data stored in the DIB. That is how can I get a image's info and it's pixels from a DIB returned by IRasterImage.ToDib() Method.    Report

06-02-2008, 2:21 fyjin99 Joined on 06-02-2008 Posts 8 Re: What's the DIB struct in C#?(Image Pro for .Net V14.0) When I turn the DIB handle to a point I can enven move back as below: IntPtr ptr = Image.ToDib(RasterConvertToDibType.BitmapInfoHeader); The Image is IRasterImage type and loaded correctly.           unsafe                {                    byte* pDib = (byte*)ptr.ToPointer();                    pDib -= 1000;//Move the point back.                    for (int i = 0; i < 1000; i++)                        pDib[i] = 255;// I expect the errors here but it just works!                } It can works with no errors. I don't know what's happened. Could anybody figure it out? Thanks:)    Report

06-02-2008, 9:19 Qasem Lubani Joined on 08-13-2006 Posts 1,082 Re: What's the DIB struct in C#?(Image Pro for .Net V14.0) The DIB that results from the ToDib method in LEADTOOLS is a standard Windows Independent Bitmap. I'm not sure what you're trying to do with the byte pointer in the code you posted, but if you use the DIB in a normal way that other DIBs work with but not ours, please explain what you're doing and I will check it for you. Qasem Al-Lubani LEAD Technical Support www.leadtools.com    Report

06-02-2008, 21:42 fyjin99 Joined on 06-02-2008 Posts 8 Re: What's the DIB struct in C#?(Image Pro for .Net V14.0) I'm just trying to read the image's data form the DIB. The original BitmapInfoHeader defined WINDGI.H (VC 6.0) is: typedef struct tagBITMAPINFOHEADER{         DWORD      biSize;         LONG       biWidth;         LONG       biHeight;         WORD       biPlanes;         WORD       biBitCount;         DWORD      biCompression;         DWORD      biSizeImage;         LONG       biXPelsPerMeter;         LONG       biYPelsPerMeter;         DWORD      biClrUsed;         DWORD      biClrImportant; } BITMAPINFOHEADER, FAR *LPBITMAPINFOHEADER, *PBITMAPINFOHEADER; In c# there is no standard BitmapInfoHeader, so I write one myself according the BitampInfoHeader defined in VC 6.0 GDI as below:  struct BITMAPINFOHEADER{         UInt32     biSize;//DWORD in GDI (VC 6.0)         int       biWidth;//LONG in GDI         int       biHeight;//LONG in GDI         ushort       biPlanes;//WORD in GDI         ushort       biBitCount;//WORD in GDI         UInt32      biCompression;//DWORD in GDI         UInt32      biSizeImage;//DWORD in GDI         int       biXPelsPerMeter;//LONG in GDI         int       biYPelsPerMeter;//LONG in GDI         UInt32      biClrUsed;//DWORD in GDI         UInt32      biClrImportant;//DWORD in GDI } IntPtr ptr = Image.ToDib(RasterConvertToDibType.BitmapInfoHeader); The Image is IRasterImage type and loaded correctly.    unsafe    {        BITMAPINFOHEADER*pDib = (BITMAPINFOHEADER*)ptr.ToPointer();//Turn to BitmapInfoHeader     } When I checked the *pDib I get above and I can't get the correct BitmapInfoHeade. The data stored in the *pDib is a mass. What I want is how to use the DIB I get in C# returned by IRasterImage. That is how can I read the infomation from the DIB.     Wish for Ur explaination and thanks:)    Report

06-03-2008, 8:48 Qasem Lubani Joined on 08-13-2006 Posts 1,082 Re: What's the DIB struct in C#?(Image Pro for .Net V14.0) Attachment: ToDib.zip I wrote this code to show that it works. The demo loads any image and uses the ToDib method and saves it back as BMP. The project only uses windows calls not LEADTOOLS. The problem you are facing might be the missing GlobalLock() method in your code. Qasem Al-Lubani LEAD Technical Support www.leadtools.com    Report

06-03-2008, 21:40 fyjin99 Joined on 06-02-2008 Posts 8 Re: What's the DIB struct in C#?(Image Pro for .Net V14.0) Thanks very much o(∩_∩)o... I missed the GlobalLock() method. Now it works!    Report

LEAD Support Fo... » Developer » DotNet » Re: What's the DIB struct in C#?(Image Pro for .Net V14.0)

(please select) Forums Home |- Search Forums |- Active Topics |- Unanswered Posts User Options |- Sign In |- Create a New Account |- Forgot Password General |- Feature Requests |- Example Requests |- Support Site Suggestions Enduser |- ePrint |-- FAQ |- Multimedia Codec's |- Capture & Convert |- Capture & Present |- Photoshop Plugins |- LEADViEW LEAD/Axtel Barcode SDK |- LEAD/Axtel FAQ |- Barcode Developer |- FAQ |- General |- Image Processing |- Image Compression |-- Examples |- Color Conversion |- Image Display |- Special Effects |- Multimedia |- Internet |-- Examples |- File Formats |- Scanning/Capture |- Common Dialogs |- Printing |- Annotations |- Database |- DICOM/Medical Imaging |- OCR |- JBIG |- Vector |- PDF |- ePrint API |- Multimedia Filter Pack API |- DotNet |-- WPF |- Deployment |- Forms Recognition |- JPIP