... tools' brush options.
After discussions, it turned out that many people disliked that the spin
scale for brush size (and some other options) get you fractional values.
How often do you actually need to get a 4.32 pixel-size brush? And even
how meaningful is it? On the other hand, you usually want a 4 or a 5
pixel size brush and it's nearly impossible to get (exactly) by dragging
the scale widget.
It is so annoying that some even resort to edit the value with keyboard!
So I am adding an optional "constrain" feature to GimpSpinScale. It will
still be possible to get fractional values when constraining is on, for
instance with keyboard edit (the arrow incrementation also will keep any
fractional part). So the interaction for such scales is simply reversed
so that you get integers easily, and fractional parts with a bit more
effort.
It is not turned on by default (some feature actually need precision and
we don't want to break the sliders for these) and for the time being, I
only applied it to all the brush settings in paint tools. Now that it
exist, we may want to apply this to more scales in various parts of
GIMP.
When a fill zone was a bit too segmented, you'd want to just stroke
across it. But it was leaving some pieces uncolored, even though the
pointer dragged through it! The exact motion mode allows more events.
Note: I don't set it in the similar color filling (where it could have
been useful too) mostly because it is harder to remove events then (even
if a point was already filled, it could still serve as a seed for more
filling if threshold > 0), thus implied too much processing. Anyway in
all my tests, it was more a problem for line art filling anyway.
In GimpToolRectangle, fix the type of the cornder_radius field, so
that non-integer radii are properly displayed.
In GimpRectangleSelectOptions and GimpToolRectangle, increase the
maximal corner radius.
In commit c71b4916af, I forgot to disconnect signals on the bucket fill
options at finalization, leading the software to crash on an
non-existing tool.
Additionally to sample merge and active layer, now we can only use the
layer above or below the active layer as line art source.
The line art fill is meant to work on drawing lines. Though sample merge
still is ok in many cases, the more you fill with colors, the more the
line art computation becomes unecessarily complex. Also when you use a
lot of layers with some of them already filled with colors, it makes it
impossible to colorize some line art zones with the tool. Moreover you
just don't want to have to hide every layers out there to colorize one
layer (especially background layers and such as you may want to see the
result with your background).
Thus we want to be able to set the source as a unique layer, while it
not being necessarily the active one (because you want lines and colors
on different layers). In this case, I am assuming that the color and the
line layers are next to each other (most common organization).
In GimpFilterTool, when the filter uses an on-canvas controller,
provide a toggle in the tool's filter-options dialog allowing to
toggle the controller's visibility. This allows getting the
controller out of the way when unneeded.
In GimpDrawTool, do nothing in the tool-widget signal handlers if
the draw-tool isn't active, to avoid CRITICALs due to a NULL
display. This can happen if a widget is set before the tool is
started.
Several en_GB to en_US.
Also "Show a preview of the transform_grided image". "grided" should be
"gridded", but I also have a problem with the underscore. Should it be
"transform-gridded"? Even so, does it really make sense?
I chose to just read "Show a preview of the transformed image", which I
think is simpler and the most understandable (we don't need to leak the
implementation with a transform grid into the human read text IMO). If
anyone think that was not the right choice, feel free to propose
otherwise.
Thanks to Bruce Cowan for noticing these.
In the gradient tool, halt the gradient editor before committing
the filter, so that its image-flush idle source is removed before
applying the operation, to avoid flushing the image, and hence
restarting its projection rendering, during application.
In GimpTool, track the last-seen pointer coordinates, modifier
state, and event time, during button_press() and motion() events
and use those to synthesize a button_release() event when
comitting/halting the tool, if the tool is still active, and a
matching button_release() event has not been received.
The paint tools (as well as other tools) require each
button_press() event to be matched by a button_release() event in
order to properly finish their operation, but one isn't organically
generated when switching tools due to a device change.
Instead of having layer picking only on paint tools with alt-click, make
it available everywhere with alt-middle click. Moving through layers is
also a way to navigate an image, so it actually makes sense to be with
other modifiers (panning, zooming, rotating), while making the feature
more generic (this is definitely useful whatever the selected tool).
If you click on a zone filled in several visible layers, you don't
necessarily want the top layer. You may want one below. With this
change, as long as you hold alt, you will loop through all candidate
layers from top to bottom (then looping back top when reaching the
bottom).
In a first alt-click, you will always end up to the top candidate.
When working with a lot of layers, it is common to have to switch easily
between layers. And having to go back to the layer list is annoying and
also sometimes not practical at all when you can't find easily the right
layer. This is a first step in an experiment for such a feature, worked
together with Aryeom as advisor (and originator of the feature idea).
For now I apply this only to paint tools, though we are considering
having it as a generic modifier too, working whatever the tool. Yet we
wouldn't be able to use alt-left click (as it is used already in some
tools).
How it works is simply that in any paint tool, alt-click allows to
switch to the topmost layer having a visible pixel at the clicked
position.
The whole bucket fill specific enum stuff is on its way out, so let's
keep this one out of libgimp for now until we decide how to present
line art filling in the PDB.
In the warp tool, set the drawable-filter's crop area to the
combined stroke bounds, so that, when comitting the tool, only this
area is processed, instead of the entire drawable area.
In GimpFilterTool, show the region combo when applying a non-point
op, as well as when applying a position-dependent point op. The
result of non-point ops may depend on the choice of input region,
even if the op is not position-dependent.
... in GimpBucketFillOptions for the line art algorithm.
Inside GimpLineArt, there are still 2 properties, but we don't show them
anymore in the Bucket Fill tool options. One of the main reason is
probably that it's hard to differentiate their usage. One is to close
with curved lines, the other with straight segments. Yet we don't
actually have any control on one or the other. All one knows is that you
can have "holes" in your drawing of a given size and you want them
close-like for filling. Only reason I can see to have 2 types of closure
is whether you'd want to totally disable one type of closure (then you
set it to 0). But this is a very limited reason for making the options
less understandable overall, IMO.
So for the time being, let's show up only a single option which sets
both properties in GimpLineArt. As patdavid says "it makes sense as a
first pass".
Also rename the option to shorter/simpler "Maximum gap length". Thanks
to patdavid and pippin for helping on figuring out this better label!
Finally I am bumping the default for the gaps to 100px. The original
values were ok for the basic small images used in demos, but not for
real life image where it was always too short (even 100px may still be
too short actually, but much better than the 20 and 60px from before!).
Practically it means that the algorithm won't close line art anymore
with both settings at 0. This can nevertheless still be a very useful
tool when you have a drawing style with well-closed lines. In such a
case, you will still profit from the color flooding under the line art
part of the algorithm.
Moreover with such well-closed zones from start, you don't get the
over-segmentation anymore and the threaded processing will be faster
obviously.
In the warp tool, when the warp is empty and the current behavior
has no effect as a result (i.e., when it's ERASE or SMOOTH), show
an error message in the status bar, and blink the behavior combo
widget in the tool options, to hint at the source of the error.
In the warp tool, when no stroke events are selected, blink the
stroke frame widget in the tool options, in addition to showing an
error message in the status bar, to hint at the source of the
error.
The enumerators of the GimpWarpBehavior enum, except for MOVE, had
a GEGL_ prefix, rather than a GIMP_ prefix, for some reason.
Change all of them to GIMP_.
This was my initial choice, but the more I think about it, the less I am
sure this was the right choice. There was some common code (as I was
making a common composite bucket fill once the line art was generated),
but there is also a lot of different code and the functions were filled
of exception when we were doing a line art fill. Also though there is a
bit of color works (the way we decide whether a pixel is part of a
stroke or not, though currently this is basic grayscale threshold), this
is really not the same as other criterions. In particular this was made
obvious on the Select by Color tool where the line art criterion was
completely meaningless and would have had to be opted-out!
This commit split a bit the code. Instead of finding the line art in the
criterion list, I add a third choice to the "Fill whole selection"/"Fill
similar colors" radio. In turn I create a new GimpBucketFillArea type
with the 3 choices, and remove line art value from GimpSelectCriterion.
I am not fully happy yet of this code, as it creates a bit of duplicate
code, and I would appreciate to move some code away from gimpdrawable-*
and gimppickable-* files. This may happen later. I break the work in
pieces to not get too messy.
Also this removes access to the smart colorization from the API, but
that's probably ok as I prefer to not freeze options too early in the
process since API needs to be stable. Probably we should get a concept
of experimental API.
Currently in bucket fill tool, the modifier was only switching fg to bg
and bg to fg, and was doing nothing when pattern was set. I make it
switch to fg as well (and remember which was the original value).
In all tools, when the current item can't be edited due to its lock
mask, use gimp_tools_blink_lock_box(), added in the previous
commit,to blink the lock box of the corresponding dockable, in
addition to showing an error message in the status bar, to hint at
the source of the error.
Add gimp_tools_blink_lock_box() utility function, in a new
gimptools-utils.c file, which takes a GimpItem, and blinks the
GimpItemTreeView lock-box of the corresponding dockable. This can
be used to hint that the item's lock toggles are preventing it from
being edited.
In the paint tools, when the current paint mode is invalid, i.e.,
when it requires an alpha channel, but the the current drawable has
no alpha channel, or its alpha channel is locked, blink the paint-
mode box widget in the tool options, in addition to showing an
error message in the status bar, to hint at the source of the
error.
In the transform tools, when there is no item of the selected type
to transform, blink the move-type box widget in the tool options,
in addition to showing an error message in the status bar, to hint
at the source of the error.
In the move tool, when there is no item of the selected type to
move, blink the move-type box widget in the tool options, in
addition to showing an error message in the status bar, to hint at
the source of the error.
In the selection tools, when the selected operation is invalid,
i.e., when trying to subtract-from or intersect-with an empty
selection, blink the selection-mode box widget in the tool options,
in addition to showing an error message in the status bar, to hint
at the source of the error.
The code was too much spread out, in core and tool code, and also it was
made too specific to fill. I'll want to reuse this code at least in the
fuzzy select tool. This will avoid code duplication, and also make this
new process more self-contained and simpler to review later (the
algorithm also has a lot of settings and it is much cleaner to have them
as properties rather than passing these as parameters through many
functions).
The refactoring may not be finished; that's at least a first step.
Add a boolean "direct" parameter to gimp_projection_flush_now(),
which specifies if the projection buffer should only be invalidated
(FALSE), or rendered directly (TRUE).
Pass TRUE when flushing the projection during painting, so that the
affected regions are rendered in a single step, instead of tile-by-
tile. We previously only invalidated the projection buffer, but
since we synchronously flush the display right after that, the
invalidated regions would still get rendered, albeit less
efficiently.
Likewise, pass TRUE when benchmarking the projection through the
debug action, and avoid flushing the display, to more accurately
measure the render time.
In particular, it allows to easily color pick. This just makes sense as
the bucket fill is definitely what one could call a "color tool", and
being able to easily change color without having to constantly switch to
color picker tool nor open a color chooser dialog is a must.
The fill type option (FG/BG/Pattern) was already mapped to the common
toggle behavior key (Ctrl on Linux), which is commonly used for
switching to color picker on paint tools. So I decided to remap the fill
type switch to GDK_MOD1_MASK (Alt on Linux) to keep consistent with
other tools (at the price of a change for anyone used to this modifier,
though I doubt it was that much used).
I also made possible to combine the 2 modifiers (so you could pick the
foreground or background color with ctrl and ctrl-alt).
The distance map has all the information we need already. Also we will
actually grow up to the max radius pixel (middle pixel of a stroke).
After discussing with Aryeom, we realized it was better to fill a stroke
fully (for cases of overflowing, I already added the "Maximum growing
size" property anyway).
When an error occurs, we want to prevent overwriting any previous
version of the file by incomplete contents. So run
g_output_stream_close() with a cancelled GCancellable to do so.
See also discussion in #2565.
When flooding the line art, we may overflood it in sample merge (which
would use color in the line art computation). And if having all colors
on the same layer, this would go over other colors (making the wrong
impression that the line art leaked).
This new option is mostly to keep some control over the mask growth.
Usually a few pixels is enough for most styles of drawing (though we
could technically allow for very wide strokes).
We don't really need to flow every line art pixel and this new
implementation is simpler (because we don't actually need over-featured
watershedding), and a lot lot faster, making the line art bucket fill
now very reactive.
For this, I am keeping the computed distance map, as well as local
thickness map around to be used when flooding the line art pixels
(basically I try to flood half the stroke thickness).
Note that there are still some issues with this new implementation as it
doesn't properly flood yet created (i.e. invisible) splines and
segments, and in particular the ones between 2 colored sections. I am
going to fix this next.
