Bug - PXC_GetPageBox / PXC_SetPageBox

[ondrejb]

Hello, I am evaluating PDF-XChange PRO SDK and I met some unexpected behavior...

1. If I save a PB_CropBox values by PXC_SetPageBox and then read it by PXC_GetPageBox, the Bottom and Top values are interchanged.
E.g. if I save Top value 50 and Bottom value 700, consequently I read Top Value 700 and Bottom value 50.

2. I have also a question concerning the PXC_PlaceImage function:
When using the 'y' parameter to horizontaly place the picture, the paramater value is aplied from the bottom of the page:
* value 0 -> picture is not visible - its top is on the page bottom,
* value 150 -> top part of the picture is visible on the bottom of the page,
* value = PageHeight -> picture is shown on the top of the page.
Is this behavior correct?

My configuration:
* PDF-XChange PRO 4 SDK, build 4.0.0.150 (downloaded before an hour
* VB.NET 2008, ver. 9.0.30729.1 SP (with SP1)
* Win Vista Business SP1
* I tried several GIF and JPG images with different resolution, always with the same outcome.

Thanks,
Ondrej Bouda

[Lzcat - Tracker Supp]

All of this is expected behavior. Please read Coordinate system in help file.
In short - y coordinate in pdf is from bottom to top, so in rect top is always greater then bottom.
When placing image you are specifying left-top corner of image and image width and height in same units as coordinates, not in pixels. Image will take full rect, regardless it size.

[ondrejb]

Thank for your answer!

I've got another question regarding the PXC_GetPageBox function:
* for PB_MediaBox, returns Top < Bottom,
* for PB_CropBox and PB_ArtBox, returns Top > Bottom.
(I didn't test other pBoxID values)

So, the media box coordinate system differs from the CropBox/ArtBox - is this correct behavior?

This difference pointed me previously to consider the CropBox values to be a bug...

I think, it also should be mentioned in the PXC_SetPageBox documentation that this function corrects meaningless input (I've just tested that the result is always the same, regardless of mischanging the Top and Bottom values).
Without such a note, I expected it either to set my values or fail...

[Ivan - Tracker Software]

Yes, there is a bug with PB_MediaBox.
Will fix it into the next release. Best practice here is to "normalize" rects returned from PXC_GetPageBox function.
Normalize means swapping left, and right when left > right, and swap top, bottom, when top < bottom.