Gaussian blur used to have a hard edge which was caused by the filter width being wider than the actual sampling range, which is what is determined by the size option. In order to fix this, we have to figure out the proper filter width for a sampling range, so that we avoid any and all hard edges.
Additionally removes the old texture method entirely.
Fixes#44
Earlier versions tried using Trilinear as the Filter, but the correct name is Linear. With this the sampling is now set to be Linear instead of undetermined.
Additionally the logic for the displacement was adjusted and now no longer renders incorrectly when going from texel to texel. This was due to the unstable math being performed to retrieve the sign of the number, but the sign() command can do it without this math being required.
Source Mirror would incorrectly crash if an Audio only source was selected, as it expected a video frame to be present of any size. This fixes the problem by first testing if there is any video information to render and then just catching any exception that happens during rendering.
The normal OBS behavior is to cache files that are loaded from disk, however this is not the behavior we want at all, as it can miss file updates as it never checks the disk for an updated file.
So instead of relying on OBS, this implements the file reading and effect creation without the cache. If a cache is necessary, it would not be the job of this class.
This works around the incorrect shadow on the edge of the Signed Distance Field, but it does not get rid of it completely. Due to linear sampling it will still show at some point so a different solution has to be found in the future.
Colored shadows previously had an effect on the image color, but this is incorrect if the image is fully opaque. This fixes it by using premultiplied alpha mixing instead.
This allows increasing or decreasing the accuracy of the Signed Distance Field at runtime without requiring the initial source to be resized. Use case for this would be small text where the higher quality would only be noticable on the shadow and not the text itself.
Sources were rendering with a black border around them if they had a soft fade, which is due to how the shadow calculated the image sample. With the new shader code this is now fixed and the source looks like it should be. Additionally this removes the bug where enabling any shadow would cause only the texels to draw that were above the threshold.
Additionally this adds support for inverse gradients (min > max) and negative gradients for outer shadows instead of only positive gradients. This technically allows for cleaner shadows.
The nature of this Signed Distance Field based Filter is not to only draw shadows, but to also draw an outline or even glow around a source. Therefore the name "Inner/Outer Shadow (SDF)" does not fit well with the intent of the actual Filter.
Allows for enumerating any kind of source, as long as it has a name and is not private. As obs_enum_scenes is a 23.x and above function, this class should be used instead to remain backwards compatible.
Fixes the m_source_texture = nullptr bug, which happened due to m_tick and m_last_tick both being 0, as no video_tick is called when the source is first created. Instead a boolean flag is now used that is reset to false on each video_tick.
This replaces the use of gs_texture_t* with gs::texture, further improving stability. Additionally some of the useless checks were replaced or reduced.
The filters are always the same for every language and should not be translated, instead only the file type should be translated. This way bad translations will not affect the options that the user can select.
The Transform filter will now no longer render the child source more than once per tick(), resulting in an overall speed up for heavy sources. This also applies to mipmapping and shape rendering. Any other calls to video_render will instead just use the cached texture.
Additionally the crash on exit has been fixed which was caused by strings.hpp containing static const char*s and using these directly in obs calls. Instead we now use #define for those property names
Michael Fabian 'Xaymar' Dirks