these are the same nearly always, but during
an image-scale, the image size is updated early
and expose redraw following dialog destruction
uses the projection before the scale.
Basically this patch partly restores the code
before commit 8b8e67ffe2
which is the last bit of non-item drawing of stuff that is not
somehow the image itself... wheee!
This involves reverting commit
6bce0641d4 and adding back all the
vectors handlers that were in gimpdisplayshell-callbacks.c before.
Change the callbacks to manage proxy items for all the image's
vectors.
and use it to draw the layer boundary. Remove a lot of stuff
that was there only to draw the boundary before:
- remvoe all layer boundary stuff from the selection code
- remove gimp_display_shell_draw_layer()
- remove enum values GIMP_SELECTION_LAYER_ON,OFF from core-enums.h
- remove all lines calling gimp_image_selection_control() with
the removed enum values
- remove gimp_layer_boundary()
- Add signals GimpImage::guide_added(), removed() and moved()
- Remove singal GimpImage::update_guide()
- Adapt core code to emit the new signals instead of update_guide()
- Have the shell connect to the new signals and update guide canvas
items as needed
- Remove gimp_display_shell_draw_guides()
- Add GimpImage signal "sample-point-moved" and emit it when needed
- Let the shell connect to the sample point add, remove and move signals
and update the canvas items accordingly
- Remove gimp_display_shell_draw_sample_points()
Instead of blending the scaled image data onto the checkerboard and
then painting this image to the screen, render the image data into
an ARGB cairo image surface. Then paint a checkerboard on the canvas
and the image on top of it.
Introduce gimp_vectors_get_bezier() which creates the bezier
representation on demand and then caches it for subsequent calls
until the vectors object is frozen.
At some point we should introduce GimpVectors::changed instead
of relying on the fact that a vectors object is always frozen
and thawn whenever it is changed...
and remove all old selection drawing code. Thanks to Benjamin Otte for
pointing out the right optimization.
Also fixes bug #479875 - performance problem drawing a complex selection.
and duplicate quite some code in the spirit of the previous commit
(rename stuff using GdkSegment to _old() and add new functions that
return arrays of BoundSegs, for the lack of a nicer struct). This is
all very ugly and will change.
