Unable to convert to images.

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   I am using the licensed Android Version for Debenu Quick Pdf (12.12).I am converting the Pages of a PDF file  into jpeg images using the following code:

 int fileHandle = mDQPL.DAOpenFile("file_path", password);
 int pageCount = mDQPL.DAGetPageCount(fileHandle);

for (int pageIndex = 1; pageIndex <= pageCount; pageIndex++) {

        int pageRef = mDQPL.DAFindPage(fileHandle, pageIndex);
        mDQPL.DARenderPageToFile(fileHandle, pageRef, DEBENU_JPEG_OUTPUT, DEBENU_IMAGE_DPI,
					"image_file_path");

}

This code is working for most files, however there are some for which it generated blank jpeg images for the PDF pages. For example in the following pdf:
https://drive.google.com/file/d/0B_6Z82hoBteTMzhCNVlqa0xqSjQ/view?usp=sharing

when I attempted to convert it into image using the above code, all I got is:(For its first Page)
https://drive.google.com/drive/folders/0B_6Z82hoBteTVDVUMUxUcHNxMk0

Please note: when i used the windows version of the library, it managed to successfully convert the PDF into images.

How can i handle this?

Edited by Ludwig - 05 Apr 16 at 7:08AM

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Ludwig Members Profile Find Members Posts Team Player Joined: 07 May 15 Location: India Status: Offline Points: 33	Post Options Post Reply Quote Ludwig Report Post Thanks(0) Quote Reply Topic: Unable to convert to images. Posted: 05 Apr 16 at 7:05AM
	I am using the licensed Android Version for Debenu Quick Pdf (12.12). I am converting the Pages of a PDF file into jpeg images using the following code: int fileHandle = mDQPL.DAOpenFile("file_path", password); int pageCount = mDQPL.DAGetPageCount(fileHandle); for (int pageIndex = 1; pageIndex <= pageCount; pageIndex++) { int pageRef = mDQPL.DAFindPage(fileHandle, pageIndex); mDQPL.DARenderPageToFile(fileHandle, pageRef, DEBENU_JPEG_OUTPUT, DEBENU_IMAGE_DPI, "image_file_path"); } This code is working for most files, however there are some for which it generated blank jpeg images for the PDF pages. For example in the following pdf: https://drive.google.com/file/d/0B_6Z82hoBteTMzhCNVlqa0xqSjQ/view?usp=sharing when I attempted to convert it into image using the above code, all I got is:(For its first Page) https://drive.google.com/drive/folders/0B_6Z82hoBteTVDVUMUxUcHNxMk0 Please note: when i used the windows version of the library, it managed to successfully convert the PDF into images. How can i handle this? Edited by Ludwig - 05 Apr 16 at 7:08AM

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3529	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 05 Apr 16 at 7:37PM
	Hi Ludwig, i can only test with the windows version. My app for rendering is made with 10.14 and it works fine with your files. The android version of the library comes last - so you can post your problem on the official support page from Debenu (if it's a real error here isn't the right place 'cause nobody here in the USER-forum can change it). But anyway leave this function and try another one for rendering. Below a snippet from my code - perhaps this function works better for you, too: // . . . lv_pwidth := QP.PageWidth; lv_pheight := QP.PageHeight; if ( lv_pwidth > lv_pheight ) then lv_pmax := lv_pwidth else lv_pmax := lv_pheight; lv_dpi := Round(( lv_pmax * 72 ) / 692); If x_suchen = '' Then begin ProgressBar1.Position := 60; ProgressBar1.Repaint; end; Save_Cursor := Screen.Cursor; Screen.Cursor := crHourglass; { Show hourglass cursor } targetfile := target + ExtractFileName(Edit1.Text) + '.jpg'; QP.RenderDocumentToFile(lv_dpi, 1, QP.PageCount, 1, targetfile); // . . .
	Cheers, Ingo

Ludwig Members Profile Find Members Posts Team Player Joined: 07 May 15 Location: India Status: Offline Points: 33	Post Options Post Reply Quote Ludwig Report Post Thanks(0) Quote Reply Posted: 06 Apr 16 at 1:57AM
	When i used the files with a Windows version of the Debenu Library. It did work fine. The problem appears only with the Android Version. I will post the problem on the support page for Debenu.

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3529	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 06 Apr 16 at 6:49PM
	Never the less you could try "my" suggestion with RenderDocumentToFile ;-)
	Cheers, Ingo