kondou - Guild Wars 2 build template visualizer

Age	Commit message (Collapse)	Author
2019-12-12	remove quick_error	Daniel Schadt
	quick_error used the deprecated Error::cause interface, therefore we want to use our own error enums with proper methods.
2019-12-10	avoid crashing with empty build templates	Daniel Schadt
	This would occur if e.g. only the profession was given.
2019-12-08	improve line rendering	Daniel Schadt
	This makes it so that instead of always going from the middle of the minor trait, they will now adjust based on where they are going to. This means if the chosen trait is the top one, the line will start a bit further to the top, which makes it better to look at.
2019-12-08	formatting	Daniel Schadt

2019-12-08	center skills in output image	Daniel Schadt

2019-12-08	use imageproc to draw the rectangle	Daniel Schadt
	Doesn't change the outcome but looks better to read
2019-12-08	improve antialiasing of thick lines	Daniel Schadt
	As it turns out, the algorithm for drawing convex polygons is very bad at handling aliasing, and the line height looked off as well. The new algorithm fixes the issue by first drawing a horizontal filled rectangle, then rotating the rectangle by the required angle (using bicubic filtering) and finally overlaying the rectangle onto the target. This improves both the looks of the line height and the aliasing effects.
2019-12-08	add support for brightness gradients	Daniel Schadt

2019-12-08	fix background cropping	Daniel Schadt

2019-12-07	improve grayscale rendering	Daniel Schadt
	Apparently, turning the picture to grayscale also messes with the alpha channel. A lot of trait icons have a small transparent border though. Therefore, we want to preserve the alpha channel by copying it back from the original trait icon. This improves render quality and removes some of the artifacts.
2019-12-06	initial commit	Daniel Schadt