I need help - I can help

Add an image

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=1698
Printed Date: 10 Nov 24 at 7:44PM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: Add an image

Posted By: loul
Subject: Add an image
Date Posted: 04 Jan 11 at 4:16PM

I am trying to add an image of a captured control to a PDF without saving it to a file first.

Saving the image to a file first does work but my report will have ~30 images of screen captured controls and I would prefer to leave the disc out of it.

Environment:

MSVS 2008

QuickPDF 7.22 ActiveX

Any help would be appreciated.

TIA,

Lou

Replies:

Posted By: Dimitry
Date Posted: 12 Jan 11 at 10:01AM

Please check the following functions:

http://www.quickpdflibrary.com/help/quickpdf/AddImageFromStream.php - AddImageFromStream()

http://www.quickpdflibrary.com/help/quickpdf/AddImageFromString.php - AddImageFromString()

http://www.quickpdflibrary.com/help/quickpdf/AddImageFromVariant.php - AddImageFromVariant()

-------------
Regards,
Dmitry

Posted By: loul
Date Posted: 12 Jan 11 at 1:58PM

Dimitry wrote:

Please check the following functions:

http://www.quickpdflibrary.com/help/quickpdf/AddImageFromStream.php - AddImageFromStream()

http://www.quickpdflibrary.com/help/quickpdf/AddImageFromString.php - AddImageFromString()

http://www.quickpdflibrary.com/help/quickpdf/AddImageFromVariant.php - AddImageFromVariant()

The only one of these that is available in the ActiveX is AddImageFromVariant.

I have tried to use this method using an Image and Bitmap types to no avail.

C# doesn't have a "variant" type so I may need to do some processing that I have not figured out yet since the time was short and I needed to make something work. I am currently writing the images to temp jpeg files and using the AddImageFromFile. I am not taking as hard of a performance hit as I expected but I would prefer to avoid writing the files to disc and reading them back if possible.

Posted By: Dimitry
Date Posted: 24 Jan 11 at 8:15PM

Hope this function imageToByteArray() and the following code sample will help you:

public byte[] imageToByteArray(System.Drawing.Image imageIn)
{
MemoryStream ms = new MemoryStream();
imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
return ms.ToArray();
}

private void button1_Click(object sender, EventArgs e)
{
QuickPDFAX0723.PDFLibrary qp = new QuickPDFAX0723.PDFLibrary();
qp.UnlockKey(" . . . "); // Enter valid trial or commercial license key

OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.DefaultExt = "bmp";
openFileDialog1.Filter = "Image files (*.bmp)|*.bmp" ;
if (openFileDialog1.ShowDialog() != DialogResult.OK)
return;

Image image1 = Image.FromFile(openFileDialog1.FileName);
qp.AddImageFromVariant(imageToByteArray(image1), 0);

qp.SetOrigin(1);
qp.DrawImage(10, 10, qp.ImageWidth(), qp.ImageHeight());
qp.SaveToFile("sample.pdf");

}

-------------
Regards,
Dmitry

Posted By: loul
Date Posted: 24 Jan 11 at 9:19PM

I pretty much set this aside because writing the images to temp files and using AddImageFromFile got the job done and the performance hit wasn't too bad.

But I got a direct reply from AndrewC over the weekend and I started playing with this again this AM. Then combining with the reply from Dimitry I played some more (I was actually working of course) and this is what I managed to get working. This is trimmed a little and there is more code that deals with maintaining the control image's aspect ratio. I also removed some comments to save space.

Thanks to AndrewC and Dimitry for heading me in the right direction.

// capture an image of a control

private Bitmap CaptureControlImage(Control argControl)

{

Bitmap MyImage = null;

Graphics g1 = argControl.CreateGraphics();

try

{

MyImage = new Bitmap(argControl.ClientRectangle.Width,

argControl.ClientRectangle.Height,

g1);

Graphics g2 = Graphics.FromImage(MyImage);

IntPtr dc1 = g1.GetHdc();

IntPtr dc2 = g2.GetHdc();

BitBlt(dc2, 0, 0,

argControl.ClientRectangle.Width,

argControl.ClientRectangle.Height,

dc1, 0, 0, 13369376);

g1.ReleaseHdc(dc1);

g2.ReleaseHdc(dc2);

}

catch

{

MyImage = null;

}

return (MyImage);

}

// convert an image to a byte array

private byte[] GenerateImageBytes(Bitmap argBitMapIn,

ImageFormat argFormat)

{

using (MemoryStream ms = new MemoryStream())

{

argBitMapIn.Save(ms, argFormat);

return ms.ToArray();

}

public bool AddControlImageToPDF(PDFLibrary argPDFLib,

Control argControl

double argLeft,

double argTop,

double argHeight,

double argWidth)

{

// capture the control image

Bitmap img = CaptureControlImage(this.pictureBox1);

if (img == null) return (false);

// convert to array of bytes

Byte[] bitBytes = GenerateImageBytes(img, ImageFormat.Png);

//add image to the PDF

int iOK = argLib.AddImageFromVariant((Byte[])bitBytes, 0);

// if all went well draw the image

if (iOK > 0) argLib.DrawImage(argLeft, argTop, argWidth, argHeight);

return (iOK > 0);

}

I am sure would are better ways (there always is in programming) but this does the job. I am planning on using the QuickPDF Library for generating more reports for our instruments and for accessing the help PDFs in the future.

Thanks again,

Lou