2 Commits

Author	SHA1	Message	Date
Brenden Matthews	eebc8c653b	Add formatting/static analysis (#486) ... * Reform source with clang-format. Rules applied with: $ find . -iname *.h -o -iname *.cc | xargs clang-format \ -style=file -i -fallback-style=google * Add clang-format and analyze to build. Based on the excellent work at: https://github.com/ttroy50/cmake-examples * Clean up CMake stuff on macOS. * Remove vim/emacs modelines. * Update copyright dates. * Build fixes. * Build fixes. * Build fixes. * Build fixes. * Build fixes. * Build fixes.	2018-05-12 12:03:00 -04:00
Jochen Keil	56b5a7eeca	Wrapper for drawing images with imlib2 and cairo ... One problem is, that tolua/lua does not handle plain data pointers properly. Therefore something like local surface = cairo_image_surface_create_for_data( imlib_image_get_data_for_reading_only(), .. will fail using the lua bindings. Hence this wrapper, which adds a function which be used to draw an imlib image to a cairo surface. This also addresses another issue, drawing images with a transparent background (e.g. gifs or pngs) to the cairo surface properly. Apparently the image format of imlib is incompatible to cairos which uses pre-multiplied data. This is also explained in the cairo documentation. A fix for this issue is to blend the image with another alpha mask to get the correct values. The code and explanation for this was taken from http://lists.cairographics.org/archives/cairo/2008-March/013492.html Executive Summary: This wrapper function can load (transparent) images (e.g. gif or png) from a file by using imlib and draw them on a cairo surface.	2013-06-08 12:09:35 +02:00