Pixels whose source or destination alpha is zero are not blended, and
therefore do not need to be converted between the composite and blend
spaces (assuming a conversion is necessary to begin with.) When there
is a large enough segment of consecutive pixels that don't need
blending, split the conversion/blending process around it, so that
we don't convert too many unblended pixels unnecessarily.
For layers with lots of transparency, this can dramatically reduce
compositing time; for layers with no transparency, the added
overhead is rather negligible.
When adding an item to a filter stack that doesn't have a graph yet,
calling gimp_filter_stack_update_last_node() may ultimately lead to
the invocation of gimp_filter_stack_get_graph(), which would create
a new graph, and add the item's node to it; gimp_filter_stack_add()
would then erroneously attempt to re-add the node to the graph.
Fix this by calling gimp_filter_stack_update_last_node() after
(potentially) adding the node to the graph in
gimp_filter_stack_add().
The function has been unused since commit b5cc2a9.
Its work is now divided into gimp_tool_palette_set_toolbox() and
gimp_tool_palette_hierarchy_changed().
Argh! Always triple-check commits before pushing!
Commit e30c92c had completely wrong big values, which I was using
to make tab border update really visible while testing.
Allow overriding icon sizes set in themes from the preferences.
This initial commit updates only toolbox icons. More to come.
4 options are available: small, medium, large and huge (the later would
likely be useful for HiDPI screens).
Uses a new widget GimpIconSizeScale.
Merge mode lays the source layer on top of the destination, same as
normal mode, however, it assumes the source and destination are two
parts of an original whole, and are therefore mutually exclusive.
This is useful for blending cut & pasted content without artifacts,
or for replacing erased content in general.
Calculates the dot product of the two input colors, and uses that
as the value for all the output color's components. Basically,
a per-pixel mono mixer.
Useful for custom desaturation, component extraction, and crazier
stuff (bump mapping!)
Include erase mode in the menu for layers and general paint tools.
This makes the eraser tool somewhat unnecessary, but allows for
interesting use cases (e.g., airbrush eraser, etc.)
... possibly due to small win32 stack
Limit the number of samples processed in one go by gimp_composite_blend()
so that we don't overflow the stack when we alloca() buffers on it.
... and get rid of the dedicated op. This gives us support for all
the blend/composite options for this mode.
Rename COLOR_ERASE to COLOR_ERASE_LEGACY, with perceptual blending/
compositing and immutable everything, and add a new COLOR_ERASE
mode, defaulting to linear blending/compositing, with mutable
everything. Modify affected code.
These are more general, and more expensive, versions of the non-
subtractive compositing functions. They are used with modes that
specify the SUBTRACTIVE flag. This doesn't affect anything yet, but
the next commit ports color-erase mode to a blendfun.
Most modes only modify the *color* of overlapping dest/src regions,
however, erase and color-erase may also reduce their *alpha*, i.e.,
eliminate some of the overlapping content. Flag these modes with
the new SUBTRACTIVE flag, as they require more general compositing
code. The next commit adds the said code.
The mode group switching combo box is hard to discover, until we use the
default group instead of legacy group as default - it is better to make legacy
resemble the full old set to.
Try to sort all GIMP_ICON_* defines into FDO categories like in
https://specifications.freedesktop.org/icon-naming-spec/latest/ar01s04.html
Add defines for all icons we override, rename some icons to their FDO
standard names, and mark the ones we duplicate with a comment so we
don't forget to rename those to standard names in 3.0.
In DEs which use a global menu, such as Unity, updating the menu
can be expensive. This particularly affects canvas scaling and
rotation, for which updating the menu synchronously causes notable
lag.
