Help with DrawImageMatrix

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   I'm trying to use DrawImageMatrix but I can't get the image to display.
I assume that the parameters work so that

x' = x*m11+y*m12+mdx

y' = x*m21+y*m22+mdy
so if run with DrawImageMatrix(1,0,0,1,0,0) is should draw at the origin at its original size and orientation however nothing shows up in the output pdf. If I do a normal DrawImage it displays fine and DrawImageMatrix returns no error.

example code

QP->NewDocument();
QP->SetPageDimensions(3900,2400);
QP->SelectPage(1);
QP->SetOrigin(1);
QP->AddImageFromFile(L"test.tif",0);
QP->DrawImageMatrix(1,0,0,1,0,0);
QP->SaveToFile(L"Test.pdf");

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kaiken1987 Members Profile Find Members Posts Beginner Joined: 27 Jan 12 Location: United States Status: Offline Points: 5	Post Options Post Reply Quote kaiken1987 Report Post Thanks(0) Quote Reply Topic: Help with DrawImageMatrix Posted: 12 Apr 12 at 7:34PM
	I'm trying to use DrawImageMatrix but I can't get the image to display. I assume that the parameters work so that x' = xm11+ym12+mdx y' = xm21+ym22+mdy so if run with DrawImageMatrix(1,0,0,1,0,0) is should draw at the origin at its original size and orientation however nothing shows up in the output pdf. If I do a normal DrawImage it displays fine and DrawImageMatrix returns no error. example code QP->NewDocument(); QP->SetPageDimensions(3900,2400); QP->SelectPage(1); QP->SetOrigin(1); QP->AddImageFromFile(L"test.tif",0); QP->DrawImageMatrix(1,0,0,1,0,0); QP->SaveToFile(L"Test.pdf");

AndrewC Members Profile Find Members Posts Moderator Group Joined: 08 Dec 10 Location: Geelong, Aust Status: Offline Points: 841	Post Options Post Reply Quote AndrewC Report Post Thanks(0) Quote Reply Posted: 13 Apr 12 at 11:57AM
	The last two parameters are x,y so experiment with those first... The image will be scaled to 1pt x 1pt so increase the 1 values to width and height values. QP.DrawImageMatrix(100, 0, 0, 100, 300, 300); Here is some code that generates an interesting pattern. This code is not mine so I cannot tell you how the parameters were created. QP.CompressImages(1); int ImageID = QP.AddImageFromFile("aldi.bmp", 0); QP.SelectPage(1); QP.SelectImage(ImageID); QP.DrawImageMatrix(100, 0, 0, 100, 300, 300); QP.DrawImageMatrix(152.44, 60.9762, -1.53974, 72.7334, 55.8672, 543); QP.DrawImageMatrix(151.872, 63.3877, -124.567, 98.8179, 179.203, 443.602); QP.DrawImageMatrix(154.612, 63.9774, -125.495, 75.8196, 179.204, 540.918); QP.DrawImageMatrix(153.172, 63.6644, 0, 98.6157, 178.163, 444.123); QP.SaveToFile("out.pdf"); Process.Start(@"out.pdf");

fellafoo Members Profile Find Members Posts Team Player Joined: 21 May 22 Location: Simsbury, CT Status: Offline Points: 21	Post Options Post Reply Quote fellafoo Report Post Thanks(0) Quote Reply Posted: 23 May 22 at 4:51PM
	In the Adobe PDF Reference, search for Common Transformations. It's in section 8.3.3 of the PDF 1.7 document: https://opensource.adobe.com/dc-acrobat-sdk-docs/standards/pdfstandards/pdf/PDF32000_2008.pdf For example: SetMeasurementUnits(0); Note: I've gotten unexpected results using millimeters or inches. For Translation (Move X / Move Y from Origin (Left, Bottom))... DrawImageMatrix(ImageWidth * 1, 0, 0, ImageHeight * 1, MoveX, MoveY) For Scaling (Enlarge X / Enlarge Y)... DrawImageMatrix(ImageWidth * Enlargement, 0, 0, ImageHeight * Enlargement, 0, 0) For Rotations (Counter-clockwise Angle around origin)... DrawImageMatrix(ImageWidth * Cos(Angle * Pi / 180), ImageWidth * Sin(Angle * Pi / 180), ImageHeight * - Sin(Angle * Pi / 180), ImageHeight * Cos(Angle * Pi / 180), 0, 0) For Skew (ImageWidth * 1, Tan(AngleX * Pi / 180), Tan(AngleY * Pi / 180), ImageHeight * 1, 0, 0) FWIW, MFM

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: 23 May 22 at 8:26PM
	Hi :) you should have a look at: SetOrigin: https://www.debenu.com/docs/pdf_library_reference/SetOrigin.php SetGlobalOrigin: https://www.debenu.com/docs/pdf_library_reference/SetGlobalOrigin.php SetMeasurementUnits: https://www.debenu.com/docs/pdf_library_reference/SetMeasurementUnits.php SetGlobalMeasurementUnits: https://www.debenu.com/docs/pdf_library_reference/SetGlobalMeasurementUnits.php This are functions from the measurement and coordinate unit: https://www.debenu.com/docs/pdf_library_reference/SetGlobalMeasurementUnits.php Think there you'll find a solution for your issues...
	Cheers, Ingo