This patch implements an initial form of
non-destructive editing. Filters now stay active
instead of being immediately merged down.
A new column is added to the layer tree view, which
can be clicked to show a pop-over menu.
Filters can currently be hidden/shown, edited, reordered,
deleted, and merged down from this pop-over menu.
Currently, this works on layers and layer selections only.
Plenty of room for improvement!
Modified gimp_gegl_buffer_resize function to add three new parameters,
pattern, pattern_offset_x and pattern_offset_y. If pattern is not NULL,
then we set the pattern of buffet to this value. Like in
gimp_gegl_buffer_resize function, this logic is mostly copied from
gimp_drawable_fill_buffer function with minor changes.
This function returns resized version of the input buffer. It also takes
in a color argument. The layer background will be filled with this
color. Fill background logic is similar to gimp_drawable_fill_buffer.
... which determines if a node's operation-class has a specific
key, and can be used instead of gimp_gegl_node_get_key() when only
existence is important, to avoid compiler warnings.
Update the rest of the code to use the new function.
In gimp_gegl_buffer_set_extent(), clear the full now-out-of-bounds
region of the buffer, instead of only full out-of-bounds tiles;
however, we still make sure to clear full tiles, instead of partial
tiles, as much as possible. This prevents (parts of) the old
content of the buffer from showing when it's enlarged again. This
is especially relevant for the image projection, once we add
support for a dynamically-expanding canvas in the following
commits, since the projection of a reexpanded buffer can be
temporarily rendered to the display before it's fully
reconstructed, exposing parts of the old content.
.... as a drop-in replacement for gegl_buffer_set_extent(), which,
in addition to setting the buffer's extent, clears any now-out-of-
bounds tiles, to free memory.
... as a drop-in replacement for gegl_buffer_dup(), which COWs all
tiles of the source buffer, including ones that aren't fully
included within buffer's extent.
... which determines if a node is an area filter operation. If the
node is a meta op, we conservatively return TRUE, as it may involve
an area-filter op.
... which allow setting/getting the "underlying operation" node of
a graph node. For example, GimpDrawableFilter constructs a complex
graph around a given operation node, which would be the underlying
operation of the graph. This allows querying the properties of the
underlying operation, given only the graph.
In recursive cases, gimp_gegl_node_get_underlying_operation()
returns the most-nested underlying operation; when no underlying
operation has been set, gimp_gegl_node_get_underlying_operation()
returns the input node.
... which takes a GeglNode, and determines if the associated
operation is a point operation.
Use in GimpFilterTool, instead of performing the same check
manually.
Add a Babl space parameter to gimp_gegl_color_new() and all utility
functions using it. Pass NULL if the GimpRGB actually is sRGB, pass
the image's layer space if the color was already converted using
gimp_pickable_srgb_to_image_color() or similar.
Use a proper "progress" signal instead of a property "notify" one
to update the on-canvas progress widget.
This way the graph is not invalidated while processing it
- change start() and set_text() to use "format" and "..." instead of
"message", allowing to format progress messages in place
- s/cancelable/cancellable/
- move "cancellable" to be the second argument of start()
And along with it a lot of stuff like the drawable preview cache, the
gegl tile manager backend, temporary gimp_gegl_buffer_foo() stuff, and
the remaining bits of performance.
The projection is in an evil semi-ported state which makes it work
ok-ish for stuff like layer moving, but absolutely unbearable for
painting, there is also an off-by-one rendering glitch at some zoom
levels.
GIMP was doing evil hacks lying to GEGL about it's pixels being in a linear
color space when they are not. This causes incorrect rendering, makes gaussian
blur misbehave etc.
The legacy projection modes should be implemented using the same 2.2 gamma
formats that are correct to specify for sRGB data. (for proper color
management in higher bitdepths; icc backend babl formats should be used.)
For the old image modes correct babl formats are:
R'G'B'A u8 - 8 bit RGB with 2.2 gamma (sRGB) with linear alpha component
R'G'B' u8 - 8 bit RGB with 2.2 gamma (sRGB)
Y'A u8 - 8 bit Grayscale with 2.2 gamma with linear alpha component
Y' u8 - 8 bit Grayscale with 2.2 gamma
Y u8 - 8 bit linear data, used for masks/channels
A u8 - 8 bit linear alpha
-----------------------------------------------
RGBA float - 32bit floating point linear light RGB
RaGaBaA float - 32bit floating point linear light RGB, premultiplied alpha
to be used for processing that needs to scale by the alpha,
(blurs, resampling etc)
R'G'B'A float - 32bit floating point sRGB with gamma, to be used where
the result depends on being closer to perceptual when
processing, can be used a cheaper alternative to CIE Lab
based modes.
-----------------------------------------------
The legacy layer modes should use the formats with gamma 2.2 only for loading
and rendering legacy XCF files correctly, in the brave new world compositing
should most likely be done in linear light with "RGBA float" and even better
"RaGaBaA float" like GEGL does for porter duff and other compositing modes.
The ability to chose the legacy layer modes should probably be hidden from the
user unless an old .xcf has been opened.
Jehan