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Joined: Oct 31, 2020
Posts: 2013
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Non-destructive basic transformations in GIMP 2.99.19As we all know GIMP 2.99.19 does not allow non-destructive gradients and non-destructive transformations. So I modified an existing plugin of mine to do that in a hacky way. Align tool is going to update soon with the ability to work like a scale and rotate tool in GIMP 2.99.19. Allowing basic non-destructive transformations This image of the statue is so large that only a small part of it fits on the canvas. Attachment:
statue_to_big.png [ 324.46 KiB | Viewed 4336 times ]
Align tool with its update to allow non-full size images and rotations applies basic scale, offset and resize abilities Attachment:
2024-05-07_11-45.png [ 369.03 KiB | Viewed 4336 times ]
Now the non-destructive transformation is a layer effect Attachment:
2024-05-07_11-46.png [ 349.1 KiB | Viewed 4336 times ]
Here is the source code of the update for those who want to compile. It will be on GITHUB soon /* This file is an image processing operation for GEGL
*
* GEGL is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* GEGL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with GEGL; if not, see <https://www.gnu.org/licenses/>.
*
* Copyright 2006 Øyvind Kolås <[email protected]>
* 2023 Beaver, Allignment Tool (BTW, this is my 70th GEGL plugin)
Test this filter without installing by pasting this GEGL Syntax inside Gimp's GEGL Graph filter
id=in
color-overlay value=#ffffff dst-over aux=[ color value=#000000 ] gimp:layer-mode layer-mode=color-erase opacity=1.00 aux=[ color value=#ffffff ] crop
xor aux=[
ref=in scale-ratio x=0.80 y=0.80 sampler=nohalo
border-align x=0.5 y=0.5
]
end of syntax
*/
#include "config.h"
#include <glib/gi18n-lib.h>
#ifdef GEGL_PROPERTIES
enum_start (scale_mode)
enum_value (NOHALO, "nohalo", N_("No Halo"))
enum_value (LOHALO, "lohalo", N_("Lo Halo"))
enum_end (scalemode)
property_enum (algorithm, _("Scale Mode"),
scalemode, scale_mode,
NOHALO)
description (_("Select a scale algorithm. No Halo works best on scaling down images less then half and LoHalo works best on scaling down images more then half."))
property_double (scale, _("Scale"), 1.00)
description (_("Scale Image. 1.00 is the default full size."))
value_range (0.05, 1.0)
ui_range (0.05, 1.0)
ui_steps (0.1, 0.2)
property_double (x, _("Allign Amount Horizontal"), 0.5)
description (_("Horizontal Allignment. 0.0 is the left border, 0.5 is center, and 1.0 is the right border."))
value_range (0.0, 1.0)
ui_range (0.0, 1.0)
ui_steps (0.1, 0.5)
property_double (y, _("Allign Amount Vertical"), 0.5)
description (_("Vertical Allignment. 0.0 is the left border, 0.5 is center, and 1.0 is the right border."))
value_range (0.0, 1.0)
ui_range (0.0, 1.0)
ui_steps (0.1, 0.5)
property_boolean (enablerotate, _("Enable Rotate (slow)"), FALSE)
description (_("Enable rotate - which is slow as when this checkbox is enabled the rotate node will be active."))
property_double (rotate, _("Rotate on Center"), 0.0)
description(_("Angle to rotate (counter-clockwise)"))
ui_range (-180.0, 180.0)
/*This can be made normal code to restore the rotate on center option I decided to cancel.*/
#else
#define GEGL_OP_META
#define GEGL_OP_NAME alignment
#define GEGL_OP_C_SOURCE alignment.c
#include "gegl-op.h"
typedef struct
{
GeglNode *input;
GeglNode *invertstring;
GeglNode *erase;
GeglNode *idref;
GeglNode *idref2;
GeglNode *scale1;
GeglNode *scale2;
GeglNode *align;
GeglNode *replacenode;
GeglNode *nop;
GeglNode *crop;
GeglNode *rotate;
GeglNode *output;
}State;
static void attach (GeglOperation *operation)
{
GeglNode *gegl = operation->node;
GeglProperties *o = GEGL_PROPERTIES (operation);
State *state = o->user_data = g_malloc0 (sizeof (State));
state->input = gegl_node_get_input_proxy (gegl, "input");
state->output = gegl_node_get_output_proxy (gegl, "output");
#define invert_transparency \
" color-overlay value=#ffffff dst-over aux=[ color value=#000000 ] color-to-alpha color=#ffffff transparency-threshold=1 src-in aux=[ color value=#ffffff ] crop "\
/*This syntax string inverts transparency. NOTE I ALSO HAVE A PLUGIN THAT DOES THIS BUT I CHOOSE NOT TO SHIP WITH IT.*/
state->invertstring = gegl_node_new_child (gegl,
"operation", "gegl:gegl", "string", invert_transparency,
NULL);
state->erase = gegl_node_new_child (gegl,
"operation", "gegl:xor",
NULL);
state->nop = gegl_node_new_child (gegl,
"operation", "gegl:nop",
NULL);
state->replacenode = gegl_node_new_child (gegl,
"operation", "gegl:src", /*This is a GEGL exclusive blend mode that fuctions like Gimp's "lock alpha channel" and replace blend mode fused together.*/
NULL);
state->idref = gegl_node_new_child (gegl,
"operation", "gegl:nop",
NULL);
state->idref2 = gegl_node_new_child (gegl,
"operation", "gegl:nop",
NULL);
state->rotate = gegl_node_new_child (gegl,
"operation", "gegl:rotate-on-center", "sampler", 3,
NULL);
state->crop = gegl_node_new_child (gegl,
"operation", "gegl:crop",
NULL);
state->scale1 = gegl_node_new_child (gegl,
"operation", "gegl:scale-ratio", "sampler", 3, NULL); /*nohalo*/
state->scale2 = gegl_node_new_child (gegl,
"operation", "gegl:scale-ratio", "sampler", 4, NULL); /*lohalo*/
state->align = gegl_node_new_child (gegl,
"operation", "gegl:border-align",
NULL);
gegl_operation_meta_redirect (operation, "x", state->align, "x");
gegl_operation_meta_redirect (operation, "y", state->align, "y");
gegl_operation_meta_redirect (operation, "scale", state->scale1, "x");
gegl_operation_meta_redirect (operation, "scale", state->scale1, "y");
gegl_operation_meta_redirect (operation, "scale", state->scale2, "x");
gegl_operation_meta_redirect (operation, "scale", state->scale2, "y");
gegl_operation_meta_redirect (operation, "rotate", state->rotate, "degrees");
/*
In early developing this filter had a rotate option that was scrapped */
}
static void
update_graph (GeglOperation *operation)
{
GeglProperties *o = GEGL_PROPERTIES (operation);
State *state = o->user_data;
GeglNode *rotate = state->rotate;
if (!state) return;
GeglNode *scale = state->scale1; /* the default */
switch (o->algorithm) {
case NOHALO: scale = state->scale1; break;
case LOHALO: scale = state->scale2; break;
default: scale = state->scale1;
}
if (o->enablerotate) rotate = state->rotate;
if (!o->enablerotate) rotate = state->nop;
gegl_node_link_many (state->input, state->idref2, state->replacenode, state->output, NULL);
gegl_node_connect (state->replacenode, "aux", state->erase, "output");
gegl_node_link_many (state->idref2, state->idref, state->invertstring, state->erase, NULL);
gegl_node_connect (state->erase, "aux", state->align, "output");
gegl_node_link_many (state->idref, scale, rotate, state->align, NULL);
}
static void
gegl_op_class_init (GeglOpClass *klass)
{
GeglOperationClass *operation_class;
GeglOperationMetaClass *operation_meta_class = GEGL_OPERATION_META_CLASS (klass);
operation_class = GEGL_OPERATION_CLASS (klass);
operation_class->attach = attach;
operation_meta_class->update = update_graph;
gegl_operation_class_set_keys (operation_class,
"name", "lb:align",
"title", _("Alignment Tool"),
"reference-hash", "lookouthereitcomesauditnumber9",
"description", _("Do an alignment with GEGL. (SELECT CLIP (clipping option) or this filter will have a glitch. "),
"gimp:menu-path", "<Image>/Tools/Transform Tools",
"gimp:menu-label", _("Align Image filter(use second clipping option)"),
NULL);
}
#endif
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