GimpDrawable *
gimp_drawable_transform_flip (GimpDrawable *drawable,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
GimpImage *image;
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 */
orig_buffer = gimp_drawable_transform_cut (drawable, context,
&orig_offset_x, &orig_offset_y,
&new_layer);
if (orig_buffer)
{
GeglBuffer *new_buffer = NULL;
gint new_offset_x;
gint new_offset_y;
/* always clip unfloated buffers so they keep their size */
if (GIMP_IS_CHANNEL (drawable) &&
! babl_format_has_alpha (gegl_buffer_get_format (orig_buffer)))
clip_result = TRUE;
/* 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 */
if (orig_buffer)
{
new_buffer = gimp_drawable_transform_buffer_flip (drawable, context,
orig_buffer,
orig_offset_x,
orig_offset_y,
flip_type, axis,
clip_result,
&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,
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;
}
static GeglBuffer *
gimp_flip_tool_transform (GimpTransformTool *tr_tool,
GimpItem *active_item,
GeglBuffer *orig_buffer,
gint orig_offset_x,
gint orig_offset_y,
GimpColorProfile **buffer_profile,
gint *new_offset_x,
gint *new_offset_y)
{
GimpFlipTool *flip = GIMP_FLIP_TOOL (tr_tool);
GimpFlipOptions *options = GIMP_FLIP_TOOL_GET_OPTIONS (tr_tool);
GimpTransformOptions *tr_options = GIMP_TRANSFORM_TOOL_GET_OPTIONS (tr_tool);
GimpContext *context = GIMP_CONTEXT (options);
GimpOrientationType flip_type = GIMP_ORIENTATION_UNKNOWN;
gdouble axis = 0.0;
gboolean clip_result = FALSE;
GeglBuffer *ret = NULL;
flip_type = gimp_flip_tool_get_flip_type (flip);
if (flip->guide)
{
axis = gimp_guide_get_position (flip->guide);
}
else
{
switch (flip_type)
{
case GIMP_ORIENTATION_HORIZONTAL:
axis = ((gdouble) tr_tool->x1 +
(gdouble) (tr_tool->x2 - tr_tool->x1) / 2.0);
break;
case GIMP_ORIENTATION_VERTICAL:
axis = ((gdouble) tr_tool->y1 +
(gdouble) (tr_tool->y2 - tr_tool->y1) / 2.0);
break;
default:
break;
}
}
switch (tr_options->clip)
{
case GIMP_TRANSFORM_RESIZE_ADJUST:
clip_result = FALSE;
break;
case GIMP_TRANSFORM_RESIZE_CLIP:
clip_result = TRUE;
break;
default:
g_return_val_if_reached (NULL);
}
if (orig_buffer)
{
/* this happens when transforming a selection cut out of a
* normal drawable, or the selection
*/
/* always clip the selection and unfloated channels
* so they keep their size
*/
if (GIMP_IS_CHANNEL (active_item) &&
! babl_format_has_alpha (gegl_buffer_get_format (orig_buffer)))
clip_result = TRUE;
ret = gimp_drawable_transform_buffer_flip (GIMP_DRAWABLE (active_item),
context,
orig_buffer,
orig_offset_x,
orig_offset_y,
flip_type, axis,
clip_result,
buffer_profile,
new_offset_x,
new_offset_y);
}
else
{
/* this happens for entire drawables, paths and layer groups */
/* always clip layer masks so they keep their size
*/
if (GIMP_IS_CHANNEL (active_item))
clip_result = TRUE;
if (gimp_item_get_linked (active_item))
{
gimp_item_linked_flip (active_item, context,
flip_type, axis, clip_result);
}
else
{
gimp_item_flip (active_item, context,
flip_type, axis, clip_result);
}
}
return ret;
}
