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C++ won't allow us to use GimpLayerMode in the API where we used to
have GimpLayerModeEffects.

Move GimpLayerModeEffects to libgimpbase/gimpcompatenums.h so it's
not in the API any longer, and instead typedef and define stuff in
libgimp/gimptypes.h, and adapt the compat enum registering code
accordingly.

The blending function of grain merge was being used instead of grain extract.

The porting from 8bit per component scaled some 8bit fractions up to huge
floating point numbers, this works for most values but causes trouble for near
transparent pixel values. This commit copies the inner blend loop from the new
divide layer mode, but keeps the old compositing logic.

... is fully transparent, instead of just src.

The blend func results only affect the intersection of dest and src.
Run time is currently dominated by the compositing step for most modes,
so the difference in performance is pretty negligible, but it does make
a difference for the more expensive modes, like the HSV ones.

and a new function gimp_layer_mode_get_group() which will be used for
the soon-to-appear GimpLayerModeComboBox.

This makes gcc warn when new cases have been added to the layer mode enum,
better than silently failing at runtime.

Gamma doesn't change sort order of floats.

The print size displayed in image property and title format should use
gimp_unit_get_scaled_digits() instead of gimp_unit_get_digits() and
adding 1, which is quite random or magic number-y.

For operations needing to override default behavior sub-classes should still be
used.

This commit also enables pinligh, vividlight and linearlight blend mode modes

Though we display the frame delay as milliseconds, it is actually stored
as unsigned centiseconds in GIF. This means that displaying milliseconds
can be misleading since we round every value to tens and it also means
that 10ms is the lower delay allowed. This limitation is in the GIF
format.
Other animation formats may not have this limitation and we try and keep
consistent export UIs. Also the layer tagging for animation uses "ms"
syntax. So I just keep the delay entry as ms, but sets a lower allowed
value and makes it "snaps to ticks" (i.e. snaps to 10 ms increments).
Finally I add a tooltip to the field saying "GIF supports hundredths of
a second precision."
Hopefully this should make things clearer and not mislead people about
what the GIF format allows.

and add support for "gegl => 1" in plug-in-defs.pl

Miroslav Talasek authored Jan 23, 2017 and Michael Natterer committed Jan 23, 2017

Add wavelet decompose plug-in implemented from scratch.

Did some cleanup and added undo group and progress (mitch).

We can't just switch to a GimpOperationTool by using the normal
gimp_context_set_tool() or gimp_context_tool_changed() because it
needs additional initialization like setting an operation at all.

In gimp_gegl_procedure_execute_async(), g_object_set_data() the used
procedure on the newly created tool.

In gimp_display_shell_initialize_tool(), when we re-create the active
tool because of a drawable change, check for the procedure and invoke
it again, instead of simply creating an empty operation tool by
calling gimp_context_tool_changed().

Optionally convert all imported (not XCFs) images to 32 bit linear
floating point, and optionally add a little noise in order to
distribute the colors minimally. The new options are on a new "Image
Import & Export" prefs page that needs a new icon. Original dithering
patch by pippin.

Since CIE Lab is one of the supported color spaces for doing the blending -
this enum is not only about transfer functions/curves or gamma. This finishes
already started cleanups.

Adding linear burn, vivid light, linear light, pinlight and exclusion formulas
as described on
http://www.deepskycolors.com/archivo/2010/04/21/formulas-for-Photoshop-blending-modes.html

It's going to be used to the UI too and should return something
to display, even if immutable.

and formatting cleanup.

Fully removes one trampoline level and passing fewer args through the remaining
trampoline.