Using T4 Templates for caching image resources

In my project I'm doing a lot of native UI rendering1, soon I will blog on why.
Naturally I have many images to render using DrawImage methods, that requires an Image instance.
There are couple of ways to load an image but the best2 and easies option is using a Resource File, just dragging and dropping the images into the resource designer will add the file to the project and generate a nice static property by the name of the file in the static class generated by the name of the resource file.
The problem is that each time image resource property is called a new image instance is created with the requested image, so if the same image is used in multiple places3 it will be loaded multiple times in memory4.
 
Continue reading

Advertisements

How I optimized HTML Renderer and fell in love with VS Profiler

Managed HTML rendering is a pain in the ass for a really long time, a really good solution I was able to find is this HTML Renderer hosted on CodePlex, though the project seems to be dead and I'm not sure how I can contribute… Anyway, It's 100% managed code and has nice HTML 4 and CSS level 2 spec cover.
So I decided to check it out and after a little playing around it felt a bit heavy so I decided to look into its performance using built in visual studio profiler, to ruin the ending I have managed to reduce average render time from 282 msec to 24 msec (91%).
The final code with most of the issues fixes raised here and here can be found here, you can use it under the same license the original code is under. Also, if everything goes well, I might be adding features to the project including text selecting for copy-paste support.
 
Continue reading