Flat shaded grids are now rendered as a long triangle strip with
degenerate triangles.
Smooth shaded grids are not changed.
Also add back fast navigate. The only difference with 2.79 is that fast
navigate + flat shading will show slitly "incorrect" smooth face. But that's too
much effort to fix for what it is.
During drawing, the depsgrah was tagged to update and this produced a full copy of the datablock. This tag was done in order to get the right data in drawing engine, but this added a great overhead while drawing and the response of the pen was not good.
Now, the depsgraph is not tagged and the drawing engine uses the original copy data of the buffer datablock. This is not a problem because only can draw in one window at time.
There was an issue caused by Antialiasing being done after DoF. Move TAA
after DOF and Motion Blur.
Also certain pixel with lower CoC would be spread all over the background
because the neighbooring pixel have higher CoC. So we need to apply some
bilateral filtering when downsampling. Currently we limit the influence of
neighbor pixels with a CoC inside the range [MaxCoC-2, MaxCoC].
Do note that we force showing the face dot if we are in face select mode
but faces and edges overlays are disable to not loose the selected faces
entirely.
This was introduced in the original implementation of weightpaint
in 2.8 (20f95de6ba). But this is very shortsighted, we can't assume only one
object will be edited at once, nor should we tag things during drawing.
There is a chance this introduces "bugs". If it does, we then tackle them in the
proper way (usually tagging DEG after operators changing the weight paint data).
I'm using a different shading group for the active text box and the others.
This way I can assign different colors to them.
The alternative would be to create a new `shgroup_dynlines_dashed_flat_color`,
but I find this overkill for such a simple use case.
This commit adds a new armature modifier for grease pencil. The deformations are done reusing the mesh deform routines.
There is also a new operator in weight paint mode to help the artist to generate weights base on armatures. This operator is required because 2D animation workflow is not equal to meshes when parent an object to armatures.
In the drawing engine has been added the option to handle the Fade object parameter used in armatures to see the strokes while move the bones.
When rename bones, all related data of grease pencil is renamed too. This not only affect new armature code, but also layers parented and hook modifiers.
Thanks @aligorith for his review and help.
