procyberian/gimp
2
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/gimp.git synced 2025-07-03 17:33:25 +00:00
Code Issues 1 Projects 1 Releases Packages Wiki Activity Actions
gimp/app/core/gimpdrawable-transform.c
Jehan 647ebffe7b app: GimpTransformTool multi-layer aware. 
This implied a lot of other core changes, which also pushed me into
improving some of the edit actions and PDB calls to be multi-layer aware
in the same time.

Note that it is still work-in-progress, but I just had to commit
something in an acceptable intermediate state otherwise I was just going
crazy.

In particular now the various transform tools are multi-layer aware and
work simultaneously on all selected layers (and the linked layers if any
of the selected layers is linked too). Both preview and final transform
processing works.
In the limitations, preview doesn't work well (only one layer in the
preview) when there is a selection (though the actual transform works).

Also I am left to wonder how we should process this case of canvas
selection+transform on multi-layers. Indeed currently I am just creating
a floating selection (like we used to for the selection+transform case)
containing a transform result of the composited version of all selected
layers. This is a possible expected result, but another could be to get
several transformed layers (without composition). But then should the
"Floating Selection" concept allow for multiple Floating Selections?
Sooo many questions left to answer.
2020-05-28 14:28:01 +02:00

1082 lines
37 KiB
C
Raw Blame History

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-2003 Spencer Kimball, Peter Mattis, and others
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <cairo.h>
#include <gegl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "core-types.h"
#include "gegl/gimp-gegl-apply-operation.h"
#include "gegl/gimp-gegl-utils.h"
#include "gimp.h"
#include "gimp-transform-resize.h"
#include "gimpchannel.h"
#include "gimpcontext.h"
#include "gimpdrawable-transform.h"
#include "gimpimage.h"
#include "gimpimage-undo.h"
#include "gimpimage-undo-push.h"
#include "gimplayer.h"
#include "gimplayer-floating-selection.h"
#include "gimplayer-new.h"
#include "gimppickable.h"
#include "gimpprogress.h"
#include "gimpselection.h"
#include "gimp-intl.h"
/* public functions */
GeglBuffer *
gimp_drawable_transform_buffer_affine (GimpDrawable *drawable,
GimpContext *context,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
GimpTransformResize clip_result,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y,
GimpProgress *progress)
{
GeglBuffer *new_buffer;
GimpMatrix3 m;
gint u1, v1, u2, v2; /* source bounding box */
gint x1, y1, x2, y2; /* target bounding box */
GimpMatrix3 gegl_matrix;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (GEGL_IS_BUFFER (orig_buffer), NULL);
g_return_val_if_fail (matrix != NULL, NULL);
g_return_val_if_fail (buffer_profile != NULL, NULL);
g_return_val_if_fail (new_offset_x != NULL, NULL);
g_return_val_if_fail (new_offset_y != NULL, NULL);
g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
*buffer_profile =
gimp_color_managed_get_color_profile (GIMP_COLOR_MANAGED (drawable));
m = *matrix;
if (direction == GIMP_TRANSFORM_BACKWARD)
{
/* Find the inverse of the transformation matrix */
gimp_matrix3_invert (&m);
}
u1 = orig_offset_x;
v1 = orig_offset_y;
u2 = u1 + gegl_buffer_get_width (orig_buffer);
v2 = v1 + gegl_buffer_get_height (orig_buffer);
/* Find the bounding coordinates of target */
gimp_transform_resize_boundary (&m, clip_result,
u1, v1, u2, v2,
&x1, &y1, &x2, &y2);
/* Get the new temporary buffer for the transformed result */
new_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0, x2 - x1, y2 - y1),
gegl_buffer_get_format (orig_buffer));
gimp_matrix3_identity (&gegl_matrix);
gimp_matrix3_translate (&gegl_matrix, u1, v1);
gimp_matrix3_mult (&m, &gegl_matrix);
gimp_matrix3_translate (&gegl_matrix, -x1, -y1);
gimp_gegl_apply_transform (orig_buffer, progress, NULL,
new_buffer,
interpolation_type,
&gegl_matrix);
*new_offset_x = x1;
*new_offset_y = y1;
return new_buffer;
}
GeglBuffer *
gimp_drawable_transform_buffer_flip (GimpDrawable *drawable,
GimpContext *context,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y)
{
const Babl *format;
GeglBuffer *new_buffer;
GeglBufferIterator *iter;
GeglRectangle src_rect;
GeglRectangle dest_rect;
gint bpp;
gint orig_x, orig_y;
gint orig_width, orig_height;
gint new_x, new_y;
gint new_width, new_height;
gint x, y;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (GEGL_IS_BUFFER (orig_buffer), NULL);
g_return_val_if_fail (buffer_profile != NULL, NULL);
g_return_val_if_fail (new_offset_x != NULL, NULL);
g_return_val_if_fail (new_offset_y != NULL, NULL);
*buffer_profile =
gimp_color_managed_get_color_profile (GIMP_COLOR_MANAGED (drawable));
orig_x = orig_offset_x;
orig_y = orig_offset_y;
orig_width = gegl_buffer_get_width (orig_buffer);
orig_height = gegl_buffer_get_height (orig_buffer);
new_x = orig_x;
new_y = orig_y;
new_width = orig_width;
new_height = orig_height;
switch (flip_type)
{
case GIMP_ORIENTATION_HORIZONTAL:
new_x = RINT (-((gdouble) orig_x +
(gdouble) orig_width - axis) + axis);
break;
case GIMP_ORIENTATION_VERTICAL:
new_y = RINT (-((gdouble) orig_y +
(gdouble) orig_height - axis) + axis);
break;
case GIMP_ORIENTATION_UNKNOWN:
g_return_val_if_reached (NULL);
break;
}
format = gegl_buffer_get_format (orig_buffer);
bpp = babl_format_get_bytes_per_pixel (format);
new_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
new_width, new_height),
format);
if (clip_result && (new_x != orig_x || new_y != orig_y))
{
GimpRGB bg;
GeglColor *color;
gint clip_x, clip_y;
gint clip_width, clip_height;
*new_offset_x = orig_x;
*new_offset_y = orig_y;
/* Use transparency, rather than the bg color, as the "outside" color of
* channels, and drawables with an alpha channel.
*/
if (GIMP_IS_CHANNEL (drawable) || babl_format_has_alpha (format))
{
gimp_rgba_set (&bg, 0.0, 0.0, 0.0, 0.0);
}
else
{
gimp_context_get_background (context, &bg);
gimp_pickable_srgb_to_image_color (GIMP_PICKABLE (drawable),
&bg, &bg);
}
color = gimp_gegl_color_new (&bg, gimp_drawable_get_space (drawable));
gegl_buffer_set_color (new_buffer, NULL, color);
g_object_unref (color);
if (gimp_rectangle_intersect (orig_x, orig_y, orig_width, orig_height,
new_x, new_y, new_width, new_height,
&clip_x, &clip_y,
&clip_width, &clip_height))
{
orig_x = new_x = clip_x - orig_x;
orig_y = new_y = clip_y - orig_y;
}
orig_width = new_width = clip_width;
orig_height = new_height = clip_height;
}
else
{
*new_offset_x = new_x;
*new_offset_y = new_y;
orig_x = 0;
orig_y = 0;
new_x = 0;
new_y = 0;
}
if (new_width == 0 && new_height == 0)
return new_buffer;
dest_rect.x = new_x;
dest_rect.y = new_y;
dest_rect.width = new_width;
dest_rect.height = new_height;
iter = gegl_buffer_iterator_new (new_buffer, &dest_rect, 0, NULL,
GEGL_BUFFER_WRITE, GEGL_ABYSS_NONE, 1);
switch (flip_type)
{
case GIMP_ORIENTATION_HORIZONTAL:
while (gegl_buffer_iterator_next (iter))
{
gint stride = iter->items[0].roi.width * bpp;
src_rect = iter->items[0].roi;
src_rect.x = (orig_x + orig_width) -
(iter->items[0].roi.x - dest_rect.x) -
iter->items[0].roi.width;
gegl_buffer_get (orig_buffer, &src_rect, 1.0, NULL, iter->items[0].data,
stride, GEGL_ABYSS_NONE);
for (y = 0; y < iter->items[0].roi.height; y++)
{
guint8 *left = iter->items[0].data;
guint8 *right = iter->items[0].data;
left += y * stride;
right += y * stride + (iter->items[0].roi.width - 1) * bpp;
for (x = 0; x < iter->items[0].roi.width / 2; x++)
{
guint8 temp[bpp];
memcpy (temp, left, bpp);
memcpy (left, right, bpp);
memcpy (right, temp, bpp);
left += bpp;
right -= bpp;
}
}
}
break;
case GIMP_ORIENTATION_VERTICAL:
while (gegl_buffer_iterator_next (iter))
{
gint stride = iter->items[0].roi.width * bpp;
src_rect = iter->items[0].roi;
src_rect.y = (orig_y + orig_height) -
(iter->items[0].roi.y - dest_rect.y) -
iter->items[0].roi.height;
gegl_buffer_get (orig_buffer, &src_rect, 1.0, NULL, iter->items[0].data,
stride, GEGL_ABYSS_NONE);
for (x = 0; x < iter->items[0].roi.width; x++)
{
guint8 *top = iter->items[0].data;
guint8 *bottom = iter->items[0].data;
top += x * bpp;
bottom += x * bpp + (iter->items[0].roi.height - 1) * stride;
for (y = 0; y < iter->items[0].roi.height / 2; y++)
{
guint8 temp[bpp];
memcpy (temp, top, bpp);
memcpy (top, bottom, bpp);
memcpy (bottom, temp, bpp);
top += stride;
bottom -= stride;
}
}
}
break;
case GIMP_ORIENTATION_UNKNOWN:
gegl_buffer_iterator_stop (iter);
break;
}
return new_buffer;
}
static void
gimp_drawable_transform_rotate_point (gint x,
gint y,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gint *new_x,
gint *new_y)
{
g_return_if_fail (new_x != NULL);
g_return_if_fail (new_y != NULL);
switch (rotate_type)
{
case GIMP_ROTATE_90:
*new_x = RINT (center_x - (gdouble) y + center_y);
*new_y = RINT (center_y + (gdouble) x - center_x);
break;
case GIMP_ROTATE_180:
*new_x = RINT (center_x - ((gdouble) x - center_x));
*new_y = RINT (center_y - ((gdouble) y - center_y));
break;
case GIMP_ROTATE_270:
*new_x = RINT (center_x + (gdouble) y - center_y);
*new_y = RINT (center_y - (gdouble) x + center_x);
break;
default:
*new_x = x;
*new_y = y;
g_return_if_reached ();
}
}
GeglBuffer *
gimp_drawable_transform_buffer_rotate (GimpDrawable *drawable,
GimpContext *context,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y)
{
const Babl *format;
GeglBuffer *new_buffer;
GeglRectangle src_rect;
GeglRectangle dest_rect;
gint orig_x, orig_y;
gint orig_width, orig_height;
gint orig_bpp;
gint new_x, new_y;
gint new_width, new_height;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (GEGL_IS_BUFFER (orig_buffer), NULL);
g_return_val_if_fail (buffer_profile != NULL, NULL);
g_return_val_if_fail (new_offset_x != NULL, NULL);
g_return_val_if_fail (new_offset_y != NULL, NULL);
*buffer_profile =
gimp_color_managed_get_color_profile (GIMP_COLOR_MANAGED (drawable));
orig_x = orig_offset_x;
orig_y = orig_offset_y;
orig_width = gegl_buffer_get_width (orig_buffer);
orig_height = gegl_buffer_get_height (orig_buffer);
orig_bpp = babl_format_get_bytes_per_pixel (gegl_buffer_get_format (orig_buffer));
switch (rotate_type)
{
case GIMP_ROTATE_90:
gimp_drawable_transform_rotate_point (orig_x,
orig_y + orig_height,
rotate_type, center_x, center_y,
&new_x, &new_y);
new_width = orig_height;
new_height = orig_width;
break;
case GIMP_ROTATE_180:
gimp_drawable_transform_rotate_point (orig_x + orig_width,
orig_y + orig_height,
rotate_type, center_x, center_y,
&new_x, &new_y);
new_width = orig_width;
new_height = orig_height;
break;
case GIMP_ROTATE_270:
gimp_drawable_transform_rotate_point (orig_x + orig_width,
orig_y,
rotate_type, center_x, center_y,
&new_x, &new_y);
new_width = orig_height;
new_height = orig_width;
break;
default:
g_return_val_if_reached (NULL);
break;
}
format = gegl_buffer_get_format (orig_buffer);
if (clip_result && (new_x != orig_x || new_y != orig_y ||
new_width != orig_width || new_height != orig_height))
{
GimpRGB bg;
GeglColor *color;
gint clip_x, clip_y;
gint clip_width, clip_height;
new_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
orig_width, orig_height),
format);
*new_offset_x = orig_x;
*new_offset_y = orig_y;
/* Use transparency, rather than the bg color, as the "outside" color of
* channels, and drawables with an alpha channel.
*/
if (GIMP_IS_CHANNEL (drawable) || babl_format_has_alpha (format))
{
gimp_rgba_set (&bg, 0.0, 0.0, 0.0, 0.0);
}
else
{
gimp_context_get_background (context, &bg);
gimp_pickable_srgb_to_image_color (GIMP_PICKABLE (drawable),
&bg, &bg);
}
color = gimp_gegl_color_new (&bg, gimp_drawable_get_space (drawable));
gegl_buffer_set_color (new_buffer, NULL, color);
g_object_unref (color);
if (gimp_rectangle_intersect (orig_x, orig_y, orig_width, orig_height,
new_x, new_y, new_width, new_height,
&clip_x, &clip_y,
&clip_width, &clip_height))
{
gint saved_orig_x = orig_x;
gint saved_orig_y = orig_y;
new_x = clip_x - orig_x;
new_y = clip_y - orig_y;
switch (rotate_type)
{
case GIMP_ROTATE_90:
gimp_drawable_transform_rotate_point (clip_x + clip_width,
clip_y,
GIMP_ROTATE_270,
center_x,
center_y,
&orig_x,
&orig_y);
orig_x -= saved_orig_x;
orig_y -= saved_orig_y;
orig_width = clip_height;
orig_height = clip_width;
break;
case GIMP_ROTATE_180:
orig_x = clip_x - orig_x;
orig_y = clip_y - orig_y;
orig_width = clip_width;
orig_height = clip_height;
break;
case GIMP_ROTATE_270:
gimp_drawable_transform_rotate_point (clip_x,
clip_y + clip_height,
GIMP_ROTATE_90,
center_x,
center_y,
&orig_x,
&orig_y);
orig_x -= saved_orig_x;
orig_y -= saved_orig_y;
orig_width = clip_height;
orig_height = clip_width;
break;
}
new_width = clip_width;
new_height = clip_height;
}
else
{
new_width = 0;
new_height = 0;
}
}
else
{
new_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
new_width, new_height),
format);
*new_offset_x = new_x;
*new_offset_y = new_y;
orig_x = 0;
orig_y = 0;
new_x = 0;
new_y = 0;
}
if (new_width < 1 || new_height < 1)
return new_buffer;
src_rect.x = orig_x;
src_rect.y = orig_y;
src_rect.width = orig_width;
src_rect.height = orig_height;
dest_rect.x = new_x;
dest_rect.y = new_y;
dest_rect.width = new_width;
dest_rect.height = new_height;
switch (rotate_type)
{
case GIMP_ROTATE_90:
{
guchar *buf = g_new (guchar, new_height * orig_bpp);
gint i;
/* Not cool, we leak memory if we return, but anyway that is
* never supposed to happen. If we see this warning, a bug has
* to be fixed!
*/
g_return_val_if_fail (new_height == orig_width, NULL);
src_rect.y = orig_y + orig_height - 1;
src_rect.height = 1;
dest_rect.x = new_x;
dest_rect.width = 1;
for (i = 0; i < orig_height; i++)
{
src_rect.y = orig_y + orig_height - 1 - i;
dest_rect.x = new_x + i;
gegl_buffer_get (orig_buffer, &src_rect, 1.0, NULL, buf,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
gegl_buffer_set (new_buffer, &dest_rect, 0, NULL, buf,
GEGL_AUTO_ROWSTRIDE);
}
g_free (buf);
}
break;
case GIMP_ROTATE_180:
{
guchar *buf = g_new (guchar, new_width * orig_bpp);
gint i, j, k;
/* Not cool, we leak memory if we return, but anyway that is
* never supposed to happen. If we see this warning, a bug has
* to be fixed!
*/
g_return_val_if_fail (new_width == orig_width, NULL);
src_rect.y = orig_y + orig_height - 1;
src_rect.height = 1;
dest_rect.y = new_y;
dest_rect.height = 1;
for (i = 0; i < orig_height; i++)
{
src_rect.y = orig_y + orig_height - 1 - i;
dest_rect.y = new_y + i;
gegl_buffer_get (orig_buffer, &src_rect, 1.0, NULL, buf,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
for (j = 0; j < orig_width / 2; j++)
{
guchar *left = buf + j * orig_bpp;
guchar *right = buf + (orig_width - 1 - j) * orig_bpp;
for (k = 0; k < orig_bpp; k++)
{
guchar tmp = left[k];
left[k] = right[k];
right[k] = tmp;
}
}
gegl_buffer_set (new_buffer, &dest_rect, 0, NULL, buf,
GEGL_AUTO_ROWSTRIDE);
}
g_free (buf);
}
break;
case GIMP_ROTATE_270:
{
guchar *buf = g_new (guchar, new_width * orig_bpp);
gint i;
/* Not cool, we leak memory if we return, but anyway that is
* never supposed to happen. If we see this warning, a bug has
* to be fixed!
*/
g_return_val_if_fail (new_width == orig_height, NULL);
src_rect.x = orig_x + orig_width - 1;
src_rect.width = 1;
dest_rect.y = new_y;
dest_rect.height = 1;
for (i = 0; i < orig_width; i++)
{
src_rect.x = orig_x + orig_width - 1 - i;
dest_rect.y = new_y + i;
gegl_buffer_get (orig_buffer, &src_rect, 1.0, NULL, buf,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
gegl_buffer_set (new_buffer, &dest_rect, 0, NULL, buf,
GEGL_AUTO_ROWSTRIDE);
}
g_free (buf);
}
break;
}
return new_buffer;
}
GimpDrawable *
gimp_drawable_transform_affine (GimpDrawable *drawable,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
GimpTransformResize clip_result,
GimpProgress *progress)
{
GimpImage *image;
GList *drawables;
GeglBuffer *orig_buffer;
gint orig_offset_x;
gint orig_offset_y;
gboolean new_layer;
GimpDrawable *result = NULL;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (matrix != NULL, NULL);
g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL);
image = gimp_item_get_image (GIMP_ITEM (drawable));
/* Start a transform undo group */
gimp_image_undo_group_start (image,
GIMP_UNDO_GROUP_TRANSFORM,
C_("undo-type", "Transform"));
/* Cut/Copy from the specified drawable */
drawables = g_list_prepend (NULL, drawable);
orig_buffer = gimp_drawable_transform_cut (drawables, context,
&orig_offset_x, &orig_offset_y,
&new_layer);
g_free (drawables);
if (orig_buffer)
{
GeglBuffer *new_buffer;
gint new_offset_x;
gint new_offset_y;
GimpColorProfile *profile;
/* also transform the mask if we are transforming an entire layer */
if (GIMP_IS_LAYER (drawable) &&
gimp_layer_get_mask (GIMP_LAYER (drawable)) &&
gimp_channel_is_empty (gimp_image_get_mask (image)))
{
GimpLayerMask *mask = gimp_layer_get_mask (GIMP_LAYER (drawable));
gimp_item_transform (GIMP_ITEM (mask), context,
matrix,
direction,
interpolation_type,
clip_result,
progress);
}
/* transform the buffer */
new_buffer = gimp_drawable_transform_buffer_affine (drawable, context,
orig_buffer,
orig_offset_x,
orig_offset_y,
matrix,
direction,
interpolation_type,
clip_result,
&profile,
&new_offset_x,
&new_offset_y,
progress);
/* Free the cut/copied buffer */
g_object_unref (orig_buffer);
if (new_buffer)
{
result = gimp_drawable_transform_paste (drawable, new_buffer, profile,
new_offset_x, new_offset_y,
new_layer);
g_object_unref (new_buffer);
}
}
/* push the undo group end */
gimp_image_undo_group_end (image);
return result;
}
GimpDrawable *
gimp_drawable_transform_flip (GimpDrawable *drawable,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
GimpImage *image;
GList *drawables;
GeglBuffer *orig_buffer;
gint orig_offset_x;
gint orig_offset_y;
gboolean new_layer;
GimpDrawable *result = NULL;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
image = gimp_item_get_image (GIMP_ITEM (drawable));
/* Start a transform undo group */
gimp_image_undo_group_start (image,
GIMP_UNDO_GROUP_TRANSFORM,
C_("undo-type", "Flip"));
/* Cut/Copy from the specified drawable */
drawables = g_list_prepend (NULL, drawable);
orig_buffer = gimp_drawable_transform_cut (drawables, context,
&orig_offset_x, &orig_offset_y,
&new_layer);
g_free (drawables);
if (orig_buffer)
{
GeglBuffer *new_buffer;
gint new_offset_x;
gint new_offset_y;
GimpColorProfile *profile;
/* also transform the mask if we are transforming an entire layer */
if (GIMP_IS_LAYER (drawable) &&
gimp_layer_get_mask (GIMP_LAYER (drawable)) &&
gimp_channel_is_empty (gimp_image_get_mask (image)))
{
GimpLayerMask *mask = gimp_layer_get_mask (GIMP_LAYER (drawable));
gimp_item_flip (GIMP_ITEM (mask), context,
flip_type,
axis,
clip_result);
}
/* transform the buffer */
new_buffer = gimp_drawable_transform_buffer_flip (drawable, context,
orig_buffer,
orig_offset_x,
orig_offset_y,
flip_type, axis,
clip_result,
&profile,
&new_offset_x,
&new_offset_y);
/* Free the cut/copied buffer */
g_object_unref (orig_buffer);
if (new_buffer)
{
result = gimp_drawable_transform_paste (drawable, new_buffer, profile,
new_offset_x, new_offset_y,
new_layer);
g_object_unref (new_buffer);
}
}
/* push the undo group end */
gimp_image_undo_group_end (image);
return result;
}
GimpDrawable *
gimp_drawable_transform_rotate (GimpDrawable *drawable,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
GimpImage *image;
GList *drawables;
GeglBuffer *orig_buffer;
gint orig_offset_x;
gint orig_offset_y;
gboolean new_layer;
GimpDrawable *result = NULL;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
image = gimp_item_get_image (GIMP_ITEM (drawable));
/* Start a transform undo group */
gimp_image_undo_group_start (image,
GIMP_UNDO_GROUP_TRANSFORM,
C_("undo-type", "Rotate"));
/* Cut/Copy from the specified drawable */
drawables = g_list_prepend (NULL, drawable);
orig_buffer = gimp_drawable_transform_cut (drawables, context,
&orig_offset_x, &orig_offset_y,
&new_layer);
g_free (drawables);
if (orig_buffer)
{
GeglBuffer *new_buffer;
gint new_offset_x;
gint new_offset_y;
GimpColorProfile *profile;
/* also transform the mask if we are transforming an entire layer */
if (GIMP_IS_LAYER (drawable) &&
gimp_layer_get_mask (GIMP_LAYER (drawable)) &&
gimp_channel_is_empty (gimp_image_get_mask (image)))
{
GimpLayerMask *mask = gimp_layer_get_mask (GIMP_LAYER (drawable));
gimp_item_rotate (GIMP_ITEM (mask), context,
rotate_type,
center_x,
center_y,
clip_result);
}
/* transform the buffer */
new_buffer = gimp_drawable_transform_buffer_rotate (drawable, context,
orig_buffer,
orig_offset_x,
orig_offset_y,
rotate_type,
center_x, center_y,
clip_result,
&profile,
&new_offset_x,
&new_offset_y);
/* Free the cut/copied buffer */
g_object_unref (orig_buffer);
if (new_buffer)
{
result = gimp_drawable_transform_paste (drawable, new_buffer, profile,
new_offset_x, new_offset_y,
new_layer);
g_object_unref (new_buffer);
}
}
/* push the undo group end */
gimp_image_undo_group_end (image);
return result;
}
GeglBuffer *
gimp_drawable_transform_cut (GList *drawables,
GimpContext *context,
gint *offset_x,
gint *offset_y,
gboolean *new_layer)
{
GimpImage *image = NULL;
GeglBuffer *buffer = NULL;
GList *iter;
gboolean drawables_are_layers = FALSE;
g_return_val_if_fail (g_list_length (drawables), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (offset_x != NULL, NULL);
g_return_val_if_fail (offset_y != NULL, NULL);
g_return_val_if_fail (new_layer != NULL, NULL);
for (iter = drawables; iter; iter = iter->next)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (iter->data), NULL);
g_return_val_if_fail (gimp_item_is_attached (iter->data), NULL);
if (! image)
image = gimp_item_get_image (iter->data);
else
g_return_val_if_fail (image == gimp_item_get_image (iter->data), NULL);
if (drawables_are_layers)
g_return_val_if_fail (GIMP_IS_LAYER (iter->data), NULL);
else if (GIMP_IS_LAYER (iter->data))
drawables_are_layers = TRUE;
}
/* extract the selected mask if there is a selection */
if (! gimp_channel_is_empty (gimp_image_get_mask (image)))
{
gint x, y, w, h;
/* set the keep_indexed flag to FALSE here, since we use
* gimp_layer_new_from_gegl_buffer() later which assumes that
* the buffer are either RGB or GRAY. Eeek!!! (Sven)
*/
if (gimp_image_mask_intersect (image, drawables, &x, &y, &w, &h))
{
buffer = gimp_selection_extract (GIMP_SELECTION (gimp_image_get_mask (image)),
drawables, context,
TRUE, FALSE, TRUE,
offset_x, offset_y,
NULL);
/* clear the selection */
gimp_channel_clear (gimp_image_get_mask (image), NULL, TRUE);
*new_layer = TRUE;
}
else
{
buffer = NULL;
*new_layer = FALSE;
}
}
else /* otherwise, just copy the layer */
{
buffer = gimp_selection_extract (GIMP_SELECTION (gimp_image_get_mask (image)),
drawables, context,
FALSE, TRUE,
drawables_are_layers,
offset_x, offset_y,
NULL);
*new_layer = FALSE;
}
return buffer;
}
GimpDrawable *
gimp_drawable_transform_paste (GimpDrawable *drawable,
GeglBuffer *buffer,
GimpColorProfile *buffer_profile,
gint offset_x,
gint offset_y,
gboolean new_layer)
{
GimpImage *image;
GimpLayer *layer = NULL;
const gchar *undo_desc = NULL;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)), NULL);
g_return_val_if_fail (GEGL_IS_BUFFER (buffer), NULL);
g_return_val_if_fail (GIMP_IS_COLOR_PROFILE (buffer_profile), NULL);
image = gimp_item_get_image (GIMP_ITEM (drawable));
if (GIMP_IS_LAYER (drawable))
undo_desc = C_("undo-type", "Transform Layer");
else if (GIMP_IS_CHANNEL (drawable))
undo_desc = C_("undo-type", "Transform Channel");
else
return NULL;
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_EDIT_PASTE, undo_desc);
if (new_layer)
{
layer =
gimp_layer_new_from_gegl_buffer (buffer, image,
gimp_drawable_get_format_with_alpha (drawable),
_("Transformation"),
GIMP_OPACITY_OPAQUE,
gimp_image_get_default_new_layer_mode (image),
buffer_profile);
gimp_item_set_offset (GIMP_ITEM (layer), offset_x, offset_y);
floating_sel_attach (layer, drawable);
drawable = GIMP_DRAWABLE (layer);
}
else
{
gimp_drawable_set_buffer_full (drawable, TRUE, NULL,
buffer,
GEGL_RECTANGLE (offset_x, offset_y, 0, 0),
TRUE);
}
gimp_image_undo_group_end (image);
return drawable;
}
Reference in a new issue View git blame Copy permalink