Add a new "Preview linked items" option to the transform-grid
tools. When this option is enabled, together with composited
previews, the transform preview includes all linked layers/channels
when transforming a layer/channel. Note that paths aren't included
for now.
Ultimately, we'd probably want to cut down on the various preview
options and enable this by default, but let's make this optional
for now.
This commit also improves composited-preview clipping in some
cases.
(cherry picked from commit d24713349d)
Add a "Synchronous preview" option to the transform-grid tools,
which renders the composited preview synchronously. This reduces
the lag for painting the preview, but can harm responsiveness for
bigger images, where rendering the preview is slow.
This is mostly an experimental option for now; it will become more
interesting once we have mipmap rendering.
(cherry picked from commit 52cd27f0d3)
Add a "Composited preview" option to all transform-grid tools,
which displays the transform preview as part of the image
composition (i.e., as it would actually look when applying the
transformation, keeping the layer at the right position in the
stack, and with the right layer mode), instead of using an overlay.
This option is off by default, since it's generally slower to
render than an overlay, due to the lack of mipmap rendering. We're
also still using an overlay when transfoming a selection, and not a
whole layer.
In GimpTransformGridTool, when transforming a drawable, freeze the
drawable's preview while the tool is active, so that its ancestors'
previews don't get unnecessarily updated in response to hiding it.
Add a "clip" property to GimpCanvasTransformPreview, specifying the
transform's clipping mode, and clip the preview accordingly.
In GimpTransformGridTool, sync the tool's clipping mode with the
preview's clipping mode.
(cherry picked from commit 7b2e6b7595)
Add a boolean 'compress' parameter to
gimp_transform_grid_tool_push_internal_undo(). When TRUE,
successive undo steps added rapidly are compressed into a single
step.
In the various subclasses, compress undo steps for dialog changes,
since we push an undo step for every intermediate change for those
(such as while dragging a spin-scale). In contrast, we only push
tool-widget undo steps upon button release, hence there's no need
to compress them.
In gimp_transform_grid_tool_push_internal_undo(), only flush the
image when undo/redo availability for the tool changes, instead of
for every undo step. This speeds things up when many undo steps
are pushed in succession, which usually happens when using the tool
GUI.
In the transform tools, when transforming the entire image in show-
all mode, don't crop the preview and the transform bounds to the
size of the canvas.
Add a new "Image" transform type to the transform tools, in
addition to the existing "Layer", "Selection", and "Path" transform
types. The "Image" mode transforms the entire image, rather than a
single item. In tools with a preview, the preview shows the
transformed image projection. The clipping mode controls how the
canvas is clipped during the transform; in particular, the ADJUST
clipping mode resizes the canvas to fit its transformed size.
(cherry picked from commit e4990bee7b)
In GimpCanvasTransformPreview, use a GimpPickable, instead of a
GimpDrawable, as the preview source, so that we can use it with the
image projection, rather than just with drawables.
(cherry picked from commit 6023f97509)
In GimpTransformGridTool, extend the functionality of the
"Readjust" button, such that if the transformation is already
adjusted to the view (i.e., when the button is clicked the second
time), readjust the transformation to the item bounds (as when
using the tool "normally"), and vice versa. This allows switching
back and forth between "normal" mode, and "adjusted-to-view" mode.
Additionally, disable readjustment when the current transforamtion
is invalid, and show an error when readjustment results in an
invalid transformation.
(cherry picked from commit a3fa3b6181)
In GimpTransformGridTool, reset both transform directions in
response to the "Reset" button, so that the overall transformation
is restored to the identity. Previously, we would only reset the
active transform direction (possibly compensating in the opposite
direction, if both directions are linked). This was intentional,
but it's probably a bit too confusing, especially in conjunction
with the newly added "Readjust" button. Let's just go back to
resetting everything.
(cherry picked from commit 2c67b29190)
Add an optional GimpTransformGridTool::radjust() virtual function,
which subclasses can implement to radjust the transformation based
on the current state of the display, such that it's easy to
control. This is especially useful when the image is zoomed-in,
and the transform handles, which are initially across the layer
bounds, are out of view.
When a transform tool implements radjust(), show a "Readjust"
button in the tool GUI. While readjusting the transformation, we
modify the opposite transformation such that the overall transform
remains unchanged, as if both transform-directions were linked, so
that only the transform grid is readjusted.
(cherry picked from commit 5055dd10d5)
In GimpTransformGridTool, fix weak-pointer initialization for the
out-of-bounds selection-boundary canvas item, to avoid a CRITICAL
when initializing the tool in transform-selection mode for a fully
out-of-bounds selection, and a subsequent segfault when re-
initializing the tool.
(cherry picked from commit 1e739675a4)
Add a GimpTransformGridTool::matrix_to_info() virtual function,
which should extract the tool-specific transformation parameters
given a transformation matrix, and the old parameter set (which is
needed in some tools, to derive the parameters that aren't encoded
in the matrix, such as the pivot point). The transformation matrix
can be any combination of matrices calculated by the tool, and
their inverses. Subclasses should only implement this function if
every such matrix can be mapped back to transformation parameters.
This is currently the case for all the transform-grid tools, except
for the shear tool (since it only supports shearing along one of
the horizontal or the vertical directions, however, the combined
matrix may require shearing in both directions).
When a transform-grid tool implements this function, show a chain-
button between the two transform-direction radio-buttons in the
tool options. When the chain-button is linked, whenever the
transform corresponding to the active direction is modified, adjust
the transform corresponding to the non-active direction such that
the overall transform remains the same.
One notable workflow that this enables is transforming a layer
while adjusting a different area than its boundary, by first
defining the area while the transform-directions are linked, and
then transforming the area while the transform-directions are
unlinked.
(cherry picked from commit 39e23267f7)
In GimpTransformGridTool, allow performing simultaneous forward
(normal) and backward (corrective) transforms, by having each
transform direction operate on an independent set of parameters.
In other words, whereas the transform-grid tools previously had a
single transform, which could be applied either normally or
correctively using the "direction" tool-option, they now have two
independent transforms, one applied normally and the other
applied correctively, which are toggled using the "direction"
option. The overall transform is the combination of the backward
transform, followed by the forward transform.
Another way to think about it, is that the tool transforms a source
shape into a destination shape. The source shape is defined by the
backward transform, and the destination shape is defined by the
forward transform. Wherewas previously only one of these shapes
could be controlled (the other shape always being the item bounds),
it's now possible to control both shapes in a single transform.
The next commit will allow modifying both shapes simultaneously,
making this even more useful.
Note that since both transforms start off as the identity, using
only one of the transform directions has the same behavior as
before.
(cherry picked from commit de8e81f81f)
In GimpTransformGridTool, when the "show-preview" tool-option
changes, don't take the transform validity into account when
deciding whether to hide the current layer -- it should only affect
the visibility of the preview, not the layer.
(cherry picked from commit 7ed512040e)
Replace GimpTransformTool's 'drawable' field with an 'item' field,
and have GimpTransformGridTool set it to the active item, to which
the transformation is applied, during its initialization. In
gimp_transform_tool_get_active_item(), return the value of the
transform tool's 'item' field, if not NULL, instead of the image's
active item. This makes sure we apply that transform-grid tools
apply the transformation for the item for which they were
activated, even if the image's active item has changed.
(cherry picked from commit 3eaae58595)
Get rid of GimpTransformGridTool::recalc_matrix() and
gimp_transform_grid_tool_recalc_matrix(), and have
GimpTransformGridTool and its subclasses use
GimpTransformTool::recalc_matrix() and
gimp_transform_tool_recalc_matrix() directly instead.
In order to break the GimpToolWidget::changed/
GimpTransformTool::recalc_matrix() loop, add a
GimpTransformGridTool::update_widget() vfunc, which subclasses
should override to update their tool-widget (instead of doing this
in ::recalc_matrix()), and ::widget_changed(), which is called when
the tool-widget changes (and which subclasses should override
instead of connecting to the tool-widget's "changed" signal
directly.) GimpTransformGridTool calls these functions as
necessary, instead of relying on extra parameters passed to
recalc_matrix().
Adapt all the direct and indirect subclasses of
GimpTransformGridTool to the change.
(cherry picked from commit 6a3fc6c1b9)
Last commit reintroduced this bug.
Allow transforming invisible layers using transform-grid tools, by
adding a 'drawable' member to GimpTransformTool, and setting/
clearing it when initializing/halting a GimpTransformTool. In
gimp_transform_tool_check_active_item(), skip the visibility check
if the active item equals the GimpTransformTool's 'drawable'
member.
(cherry picked from commit cea6f1dc73)
Split gimp_transform_tool_get_active_item() into two functions:
gimp_transform_tool_get_active_item(), which returns the item
without checking for errors, and
gimp_transform_tool_check_active_item(), which returns the active
item while checking for errors. Adapt the rest of the code to the
change.
Remove the invisible_layer_ok parameter of
gimp_transform_tool_check_active_item(), and always return an error
when the active layer is invisible. This causes the flip and
measure tools to correctly reject invisible layers. Un-hide the
active item in GimpTransformGridTool before transforming, to avoid
rejecting layers that were hidden by the tool.
(cherry picked from commit 360b25b9a8)
While most of our transform tools use an interactive transform
grid, and have similar behavior, the flip tool is an odd one out.
The new "auto straighten" function of the measure tool introduces
another tool that performs transformations, while not behaving like
the rest of the transform tools.
Factor out the parts of GimpTransformTool that handle user
interaction into GimpTransformGridTool (with corresponding
GimpTransformGridOptions, and GimpTransformGridToolUndo), and only
leave the basic transform functionality and options in
GimpTransformTool (and GimpTransformOptions).
Derive all the transform tools (and transform-tool base classes)
that previously derived from GimpTransformTool, from
GimpTransformGridTool. The one exception is GimpFlipTool, which
still derives from GimpTransformTool directly. The next commit
will derive GimpMeasureTool from GimpTransformTool as well.
