Blender Git Loki

WIP: Refactor darwing code after merge

A lot of changes were done in draw manager in the last merge.

This commit fix the main area, but still problems with multisample frame buffer.

Merge branch 'blender2.8' into greasepencil-object

Conflicts:
source/blender/draw/intern/DRW_render.h
source/blender/draw/intern/draw_manager_framebuffer.c

Fix grease pencil paper reset loading files

The paper was reset loading any file, not only old files.

Make less sensible strength brush and smooth

Now the factor to apply is less sensible and after apply the strength a smooth operation is done with surrounding points.

Before the change in the opacity changed too much with small input.

Cleanup: Fix comments

Merge branch 'blender2.8' into greasepencil-object

Merge branch 'blender2.8' into greasepencil-object

Merge branch 'blender2.8' into greasepencil-object

Merge branch 'blender2.8' into greasepencil-object

Cleanup: Make code more compact

Update depsgraph for stroke transforms

This is required to work with COW

Update depsgraph for sculpt and select

This is required to work with COW

Fix simple points drawing with line mode

If using line mode, simple points must be drawn with point shader, not line shader.

Cleanup unused code block

Update depsgrah tag while painting

If this update is not done, the cow object used for display, does not show the current stroke.

Force Depsgraph recalculation when cache is dirty

Cleanup: Remove redundant code

Remove Custom Brush icon

Now the user can assign as icon any custom image with the brush options.

UI: Replace Eraser icons

Cleanup: Rename field and add comments