News archive

18/09/2018

JPEG Saver 5.1.1

As you can probably guess from the 0.0.1 added to the version number, this is a bugfix release. There are a few annoying bugs fixed in this version though.

First, a crash when using the shape skip option with multiple displays and the secondary displays set to not show any images. That one was easy to fix, and so was a bug preventing the screensaver from automatically progressing through the images when the secondary screens were set to show the previous image.

More complicated was an unrelated but similar bug that sometimes meant that JPEG Saver would not automatically progress through the images, and sometimes not even show the first one.

Read more . . .

23/07/2018

SVGGraph 2.28

Over the years that I have been working on SVGGraph I have always been grumbling about text. Don't get me wrong - SVG is perfectly capable of displaying text, the problem is that I can never be sure what it is going to look like.

Version 2.28 is an attempt to improve things by using font metrics to calculate the sizes of strings of text more accurately. The two example graphs below demonstrate the difference between the new method and the older method.

Using metrics
no_font_metrics = true

Both graphs are using the "Times New Roman" font, where it is easy to see that "Amanda" is a longer string than "Illicit". The new method is used for the left-hand graph, where it displays the label boxes packed quite closely to the text. The old method is enabled with the new no_font_metrics option, shown in the right-hand graph. The label box is a bit tight around "Amanda", but much too wide for "Illicit". There is more space at the left side of the graph too, because the old method thinks the seven-character string "Illicit" should be longer than the six characters of "Amanda".

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22/06/2018

JPEG Saver 5.1

JPEG Saver 5.1 is a fairly small update to version 5.0, but it does include a couple of important changes. The first of these is the replacement of JasPer with OpenJPEG. These are two different software libraries for handling JPEG 2000 images, which is still a fairly obscure format even after all these years.

If you are using JPEG 2000 images, JPEG Saver should now be able to load them a bit better. OpenJPEG actually supports loading some quite unusual images, but I didn't attempt to support them in JPEG Saver because I would have first had to figure out a way to produce the weird images for testing. So if you have some JPEG 2000 images that JPEG Saver refuses to load, please get in touch and I'll see if I can get them working.

The other quite large change is to how transitions work. It shouldn't really be noticeable in the screensaver, but internally the transitions now use a much more flexible way of deciding what happens when. This should allow for more complicated transitions in future versions.

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24/05/2018

JPEG Saver 5.0

When I replaced the NSIS installer with a WiX Toolset-built MSI file for version 4.20 of JPEG Saver, I wasn't all that happy with it. It worked fine, it installed and uninstalled the files, but it still had to include the DirectX 9 installer just in case it was installing on a machine that didn't already have it installed. JPEG Saver 5.0 is the first version since 2009 that doesn't need DirectX 9 installed - because it uses DirectX 11 instead.

DirectX 11 should already be installed on Windows 7 and newer, as it is now part of the operating system instead of a separate install. I've tested on 64-bit Windows 10 with Nvidia graphics, 32-bit Windows 10 with AMD graphics, and on a 32-bit Windows 7 virtual machine with no real graphics card at all. JPEG Saver ran without any problems on these, so I'm fairly confident it should run on most configurations.

What's new?

So what is actually new in this version? Very little, to be honest. I had to rewrite all the 3D rendering code used for the transitions and the real-time items on the main display, but hopefully JPEG Saver shouldn't look or behave much differently to the last DirectX 9 version.

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29/03/2018

SVGGraph 2.27

Every now and then I receive an email from someone wanting to do something a bit unusual with SVGGraph. My first response is to try to figure out if it is already possible, and then if it isn't I have to decide if it is something that anyone else will ever want to do. Version 2.27 contains a couple of new features that might not get used very much.

Shapes on line graphs

But is it art?

The first of these new features comes in the form of a pair of new options for the line and multi-line graphs*. The line_figure option allows line graphs to draw shapes, and the line_figure_closed option closes the shape. The options don't do much to change how the line graphs are drawn, they mostly reduce the validation of the data - repeated keys are allowed and the data will remain in the order it is provided.

Read more . . .

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