After changing HTML Renderer to GDI text rendering (see previous post and this one) I have encountered another issue: GDI doesn't support alpha channel, which means that GDI is unable to render anything with transparent color. A problem as before the change HTML Renderer fully supported transparent text.
To complete my previous post on text rendering in .NET I will present here the pitfalls I encountered migrating HTML Renderer to native GDI text rendering. The final result is ready to use NativeTextRenderer class with simple managed API that can be used for native GDI text rendering.
My research into text rendering in .NET/Windows started with HTML Renderer, I have noticed text issues in the rendered HTML: fonts were pixelated, letter were too close, words were either too close or too far apart (Figure 1). Although minor issues they were bugging me, also I was hoping it will lead to some performance improvements as from my last optimization session text draw/measure were the most time consuming operations.
The resulted improvement exceeded my wildest expectations and worth a post on.
Quick post on a great new feature in .NET 4.5: Multicore JIT.
Inspired by Rick Brewster blog post.
Following my previous post, where I investigated the performance impact of loading images in .NET application, I will conclude the discussion with optimization proposals.
Using image is an integral part of GUI application but I have found very little resources on it's resource consumption and how I can optimize it. The goal of this post is exactly that, in part 1 I will show the performance impact and in part 2 I will propose an optimization.
I'm going to consider only the memory usage as CPU performance is generally insignificant.
I'm very happy to release another update for the project, I believe I'm getting very close to remove the 'Beta' tag from it.
This update has many fixes for complex layout and tables to handle much more complex htmls, better support for style sheet loading (see below), context menu, embedded videos and finally fixing the support for preformatted text!
I have dropped support for 'Bridge' object (see below) which can be a breaking change if used, it quite easy to replace it's use with events as can be seen in the demo application. Hopefully this will be the last version that has breaking changes.
For next version (v1.5) I'm planning to rewrite the object model (CssBox monster) and core parsing engine to significantly improve performance, especially the memory allocations that can pretty bad now for large htmls. Of course I will continue to fix bugs and add support for features as requested by the community.