8934d43975
- Make the various virtual methods of GimpPaintCore use a list of drawables as argument instead of a single drawable. - gimp_brush_core_eval_transform_dynamics() can work with an image as argument rather than a drawable as it doesn't actually depends on specific drawable data. - New function gimp_paint_tool_enable_multi_paint() to be used in init() method of paint tools to announce that this tool can work with multiple layers selected. - Use gimp_paint_tool_enable_multi_paint() in the GimpSourceTool base class only for now. This is a first step for multi-layer drawing, but we don't want it to be possible in just any random cases, which is why I add a special function to advertize this capability. We will use it for special-casing the clone (as well as heal and perspective tools most likely) tool to work on several layers at once. At this step, it is still very bugged and not really working properly. In particular, since we don't process the drawable offset early anymore (because it makes no sense when we pass a list of drawables with different offsets), I suspect that all the offset-related code will be very broken.
642 lines
23 KiB
C
642 lines
23 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpheal.c
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* Copyright (C) Jean-Yves Couleaud <cjyves@free.fr>
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* Copyright (C) 2013 Loren Merritt
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <stdint.h>
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#include <string.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include "libgimpbase/gimpbase.h"
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#include "libgimpmath/gimpmath.h"
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#include "paint-types.h"
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#include "gegl/gimp-gegl-apply-operation.h"
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#include "gegl/gimp-gegl-loops.h"
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#include "core/gimpbrush.h"
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#include "core/gimpdrawable.h"
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#include "core/gimpdynamics.h"
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#include "core/gimperror.h"
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#include "core/gimpimage.h"
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#include "core/gimppickable.h"
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#include "core/gimptempbuf.h"
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#include "gimpheal.h"
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#include "gimpsourceoptions.h"
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#include "gimp-intl.h"
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/* NOTES
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*
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* The method used here is similar to the lighting invariant correction
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* method but slightly different: we do not divide the RGB components,
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* but subtract them I2 = I0 - I1, where I0 is the sample image to be
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* corrected, I1 is the reference pattern. Then we solve DeltaI=0
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* (Laplace) with I2 Dirichlet conditions at the borders of the
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* mask. The solver is a red/black checker Gauss-Seidel with over-relaxation.
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* It could benefit from a multi-grid evaluation of an initial solution
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* before the main iteration loop.
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*
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* I reduced the convergence criteria to 0.1% (0.001) as we are
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* dealing here with RGB integer components, more is overkill.
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*
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* Jean-Yves Couleaud cjyves@free.fr
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*/
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static gboolean gimp_heal_start (GimpPaintCore *paint_core,
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GList *drawables,
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GimpPaintOptions *paint_options,
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const GimpCoords *coords,
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GError **error);
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static GeglBuffer * gimp_heal_get_paint_buffer (GimpPaintCore *core,
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GimpDrawable *drawable,
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GimpPaintOptions *paint_options,
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GimpLayerMode paint_mode,
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const GimpCoords *coords,
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gint *paint_buffer_x,
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gint *paint_buffer_y,
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gint *paint_width,
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gint *paint_height);
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static void gimp_heal_motion (GimpSourceCore *source_core,
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GimpDrawable *drawable,
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GimpPaintOptions *paint_options,
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const GimpCoords *coords,
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GeglNode *op,
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gdouble opacity,
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GimpPickable *src_pickable,
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GeglBuffer *src_buffer,
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GeglRectangle *src_rect,
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gint src_offset_x,
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gint src_offset_y,
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GeglBuffer *paint_buffer,
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gint paint_buffer_x,
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gint paint_buffer_y,
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gint paint_area_offset_x,
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gint paint_area_offset_y,
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gint paint_area_width,
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gint paint_area_height);
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G_DEFINE_TYPE (GimpHeal, gimp_heal, GIMP_TYPE_SOURCE_CORE)
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#define parent_class gimp_heal_parent_class
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void
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gimp_heal_register (Gimp *gimp,
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GimpPaintRegisterCallback callback)
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{
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(* callback) (gimp,
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GIMP_TYPE_HEAL,
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GIMP_TYPE_SOURCE_OPTIONS,
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"gimp-heal",
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_("Healing"),
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"gimp-tool-heal");
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}
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static void
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gimp_heal_class_init (GimpHealClass *klass)
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{
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GimpPaintCoreClass *paint_core_class = GIMP_PAINT_CORE_CLASS (klass);
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GimpSourceCoreClass *source_core_class = GIMP_SOURCE_CORE_CLASS (klass);
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paint_core_class->start = gimp_heal_start;
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paint_core_class->get_paint_buffer = gimp_heal_get_paint_buffer;
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source_core_class->motion = gimp_heal_motion;
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}
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static void
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gimp_heal_init (GimpHeal *heal)
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{
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}
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static gboolean
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gimp_heal_start (GimpPaintCore *paint_core,
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GList *drawables,
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GimpPaintOptions *paint_options,
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const GimpCoords *coords,
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GError **error)
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{
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GimpSourceCore *source_core = GIMP_SOURCE_CORE (paint_core);
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if (! GIMP_PAINT_CORE_CLASS (parent_class)->start (paint_core, drawables,
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paint_options, coords,
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error))
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{
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return FALSE;
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}
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if (! source_core->set_source && gimp_drawable_is_indexed (drawables->data))
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{
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g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
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_("Healing does not operate on indexed layers."));
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return FALSE;
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}
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return TRUE;
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}
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static GeglBuffer *
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gimp_heal_get_paint_buffer (GimpPaintCore *core,
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GimpDrawable *drawable,
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GimpPaintOptions *paint_options,
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GimpLayerMode paint_mode,
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const GimpCoords *coords,
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gint *paint_buffer_x,
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gint *paint_buffer_y,
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gint *paint_width,
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gint *paint_height)
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{
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return GIMP_PAINT_CORE_CLASS (parent_class)->get_paint_buffer (core,
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drawable,
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paint_options,
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GIMP_LAYER_MODE_NORMAL,
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coords,
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paint_buffer_x,
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paint_buffer_y,
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paint_width,
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paint_height);
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}
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/* Subtract bottom from top and store in result as a float
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*/
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static void
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gimp_heal_sub (GeglBuffer *top_buffer,
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const GeglRectangle *top_rect,
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GeglBuffer *bottom_buffer,
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const GeglRectangle *bottom_rect,
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GeglBuffer *result_buffer,
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const GeglRectangle *result_rect)
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{
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GeglBufferIterator *iter;
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const Babl *format = gegl_buffer_get_format (top_buffer);
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gint n_components = babl_format_get_n_components (format);
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if (n_components == 2)
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format = babl_format ("Y'A float");
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else if (n_components == 4)
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format = babl_format ("R'G'B'A float");
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else
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g_return_if_reached ();
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iter = gegl_buffer_iterator_new (top_buffer, top_rect, 0, format,
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GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 3);
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gegl_buffer_iterator_add (iter, bottom_buffer, bottom_rect, 0, format,
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GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
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gegl_buffer_iterator_add (iter, result_buffer, result_rect, 0,
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babl_format_n (babl_type ("float"), n_components),
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GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE);
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while (gegl_buffer_iterator_next (iter))
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{
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gfloat *t = iter->items[0].data;
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gfloat *b = iter->items[1].data;
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gfloat *r = iter->items[2].data;
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gint length = iter->length * n_components;
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while (length--)
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*r++ = *t++ - *b++;
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}
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}
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/* Add first to second and store in result
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*/
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static void
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gimp_heal_add (GeglBuffer *first_buffer,
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const GeglRectangle *first_rect,
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GeglBuffer *second_buffer,
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const GeglRectangle *second_rect,
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GeglBuffer *result_buffer,
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const GeglRectangle *result_rect)
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{
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GeglBufferIterator *iter;
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const Babl *format = gegl_buffer_get_format (result_buffer);
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gint n_components = babl_format_get_n_components (format);
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if (n_components == 2)
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format = babl_format ("Y'A float");
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else if (n_components == 4)
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format = babl_format ("R'G'B'A float");
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else
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g_return_if_reached ();
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iter = gegl_buffer_iterator_new (first_buffer, first_rect, 0,
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babl_format_n (babl_type ("float"),
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n_components),
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GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 3);
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gegl_buffer_iterator_add (iter, second_buffer, second_rect, 0, format,
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GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
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gegl_buffer_iterator_add (iter, result_buffer, result_rect, 0, format,
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GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE);
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while (gegl_buffer_iterator_next (iter))
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{
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gfloat *f = iter->items[0].data;
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gfloat *s = iter->items[1].data;
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gfloat *r = iter->items[2].data;
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gint length = iter->length * n_components;
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while (length--)
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*r++ = *f++ + *s++;
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}
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}
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#if defined(__SSE__) && defined(__GNUC__) && __GNUC__ >= 4
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static float
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gimp_heal_laplace_iteration_sse (gfloat *pixels,
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gfloat *Adiag,
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gint *Aidx,
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gfloat w,
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gint nmask)
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{
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typedef float v4sf __attribute__((vector_size(16)));
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gint i;
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v4sf wv = { w, w, w, w };
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v4sf err = { 0, 0, 0, 0 };
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union { v4sf v; float f[4]; } erru;
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#define Xv(j) (*(v4sf*)&pixels[Aidx[i * 5 + j]])
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for (i = 0; i < nmask; i++)
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{
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v4sf a = { Adiag[i], Adiag[i], Adiag[i], Adiag[i] };
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v4sf diff = a * Xv(0) - wv * (Xv(1) + Xv(2) + Xv(3) + Xv(4));
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Xv(0) -= diff;
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err += diff * diff;
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}
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erru.v = err;
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return erru.f[0] + erru.f[1] + erru.f[2] + erru.f[3];
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}
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#endif
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/* Perform one iteration of Gauss-Seidel, and return the sum squared residual.
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*/
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static float
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gimp_heal_laplace_iteration (gfloat *pixels,
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gfloat *Adiag,
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gint *Aidx,
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gfloat w,
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gint nmask,
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gint depth)
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{
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gint i, k;
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gfloat err = 0;
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#if defined(__SSE__) && defined(__GNUC__) && __GNUC__ >= 4
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if (depth == 4)
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return gimp_heal_laplace_iteration_sse (pixels, Adiag, Aidx, w, nmask);
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#endif
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for (i = 0; i < nmask; i++)
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{
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gint j0 = Aidx[i * 5 + 0];
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gint j1 = Aidx[i * 5 + 1];
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gint j2 = Aidx[i * 5 + 2];
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gint j3 = Aidx[i * 5 + 3];
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gint j4 = Aidx[i * 5 + 4];
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gfloat a = Adiag[i];
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for (k = 0; k < depth; k++)
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{
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gfloat diff = (a * pixels[j0 + k] -
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w * (pixels[j1 + k] +
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pixels[j2 + k] +
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pixels[j3 + k] +
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pixels[j4 + k]));
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pixels[j0 + k] -= diff;
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err += diff * diff;
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}
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}
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return err;
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}
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/* Solve the laplace equation for pixels and store the result in-place.
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*/
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static void
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gimp_heal_laplace_loop (gfloat *pixels,
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gint height,
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gint depth,
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gint width,
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guchar *mask)
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{
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/* Tolerate a total deviation-from-smoothness of 0.1 LSBs at 8bit depth. */
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#define EPSILON (0.1/255)
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#define MAX_ITER 500
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gint i, j, iter, parity, nmask, zero;
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gfloat *Adiag;
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gint *Aidx;
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gfloat w;
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Adiag = g_new (gfloat, width * height);
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Aidx = g_new (gint, 5 * width * height);
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/* All off-diagonal elements of A are either -1 or 0. We could store it as a
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* general-purpose sparse matrix, but that adds some unnecessary overhead to
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* the inner loop. Instead, assume exactly 4 off-diagonal elements in each
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* row, all of which have value -1. Any row that in fact wants less than 4
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* coefs can put them in a dummy column to be multiplied by an empty pixel.
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*/
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zero = depth * width * height;
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memset (pixels + zero, 0, depth * sizeof (gfloat));
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/* Construct the system of equations.
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* Arrange Aidx in checkerboard order, so that a single linear pass over that
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* array results updating all of the red cells and then all of the black cells.
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*/
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nmask = 0;
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for (parity = 0; parity < 2; parity++)
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for (i = 0; i < height; i++)
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for (j = (i&1)^parity; j < width; j+=2)
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if (mask[j + i * width])
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{
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#define A_NEIGHBOR(o,di,dj) \
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if ((dj<0 && j==0) || (dj>0 && j==width-1) || (di<0 && i==0) || (di>0 && i==height-1)) \
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Aidx[o + nmask * 5] = zero; \
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else \
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Aidx[o + nmask * 5] = ((i + di) * width + (j + dj)) * depth;
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/* Omit Dirichlet conditions for any neighbors off the
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* edge of the canvas.
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*/
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Adiag[nmask] = 4 - (i==0) - (j==0) - (i==height-1) - (j==width-1);
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A_NEIGHBOR (0, 0, 0);
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A_NEIGHBOR (1, 0, 1);
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A_NEIGHBOR (2, 1, 0);
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A_NEIGHBOR (3, 0, -1);
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A_NEIGHBOR (4, -1, 0);
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nmask++;
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}
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/* Empirically optimal over-relaxation factor. (Benchmarked on
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* round brushes, at least. I don't know whether aspect ratio
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* affects it.)
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*/
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w = 2.0 - 1.0 / (0.1575 * sqrt (nmask) + 0.8);
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w *= 0.25;
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for (i = 0; i < nmask; i++)
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Adiag[i] *= w;
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/* Gauss-Seidel with successive over-relaxation */
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for (iter = 0; iter < MAX_ITER; iter++)
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{
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gfloat err = gimp_heal_laplace_iteration (pixels, Adiag, Aidx,
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w, nmask, depth);
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if (err < EPSILON * EPSILON * w * w)
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break;
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}
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g_free (Adiag);
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g_free (Aidx);
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}
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/* Original Algorithm Design:
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*
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* T. Georgiev, "Photoshop Healing Brush: a Tool for Seamless Cloning
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* http://www.tgeorgiev.net/Photoshop_Healing.pdf
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*/
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static void
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gimp_heal (GeglBuffer *src_buffer,
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const GeglRectangle *src_rect,
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GeglBuffer *dest_buffer,
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const GeglRectangle *dest_rect,
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GeglBuffer *mask_buffer,
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const GeglRectangle *mask_rect)
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{
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const Babl *src_format;
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const Babl *dest_format;
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gint src_components;
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gint dest_components;
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gint width;
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gint height;
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gfloat *diff, *diff_alloc;
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GeglBuffer *diff_buffer;
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guchar *mask;
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src_format = gegl_buffer_get_format (src_buffer);
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dest_format = gegl_buffer_get_format (dest_buffer);
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src_components = babl_format_get_n_components (src_format);
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dest_components = babl_format_get_n_components (dest_format);
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width = gegl_buffer_get_width (src_buffer);
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height = gegl_buffer_get_height (src_buffer);
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g_return_if_fail (src_components == dest_components);
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diff_alloc = g_new (gfloat, 4 + (width * height + 1) * src_components);
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diff = (gfloat*)(((uintptr_t)diff_alloc + 15) & ~15);
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diff_buffer =
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gegl_buffer_linear_new_from_data (diff,
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babl_format_n (babl_type ("float"),
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src_components),
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GEGL_RECTANGLE (0, 0, width, height),
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GEGL_AUTO_ROWSTRIDE,
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(GDestroyNotify) g_free, diff_alloc);
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/* subtract pattern from image and store the result as a float in diff */
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gimp_heal_sub (dest_buffer, dest_rect,
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src_buffer, src_rect,
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diff_buffer, GEGL_RECTANGLE (0, 0, width, height));
|
|
|
|
mask = g_new (guchar, mask_rect->width * mask_rect->height);
|
|
|
|
gegl_buffer_get (mask_buffer, mask_rect, 1.0, babl_format ("Y u8"),
|
|
mask, GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
|
|
|
|
gimp_heal_laplace_loop (diff, height, src_components, width, mask);
|
|
|
|
g_free (mask);
|
|
|
|
/* add solution to original image and store in dest */
|
|
gimp_heal_add (diff_buffer, GEGL_RECTANGLE (0, 0, width, height),
|
|
src_buffer, src_rect,
|
|
dest_buffer, dest_rect);
|
|
|
|
g_object_unref (diff_buffer);
|
|
}
|
|
|
|
static void
|
|
gimp_heal_motion (GimpSourceCore *source_core,
|
|
GimpDrawable *drawable,
|
|
GimpPaintOptions *paint_options,
|
|
const GimpCoords *coords,
|
|
GeglNode *op,
|
|
gdouble opacity,
|
|
GimpPickable *src_pickable,
|
|
GeglBuffer *src_buffer,
|
|
GeglRectangle *src_rect,
|
|
gint src_offset_x,
|
|
gint src_offset_y,
|
|
GeglBuffer *paint_buffer,
|
|
gint paint_buffer_x,
|
|
gint paint_buffer_y,
|
|
gint paint_area_offset_x,
|
|
gint paint_area_offset_y,
|
|
gint paint_area_width,
|
|
gint paint_area_height)
|
|
{
|
|
GimpPaintCore *paint_core = GIMP_PAINT_CORE (source_core);
|
|
GimpContext *context = GIMP_CONTEXT (paint_options);
|
|
GimpSourceOptions *src_options = GIMP_SOURCE_OPTIONS (paint_options);
|
|
GimpDynamics *dynamics = GIMP_BRUSH_CORE (paint_core)->dynamics;
|
|
GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
|
|
GeglBuffer *src_copy;
|
|
GeglBuffer *mask_buffer;
|
|
GimpPickable *dest_pickable;
|
|
const GimpTempBuf *mask_buf;
|
|
gdouble fade_point;
|
|
gdouble force;
|
|
gint mask_off_x;
|
|
gint mask_off_y;
|
|
gint dest_pickable_off_x;
|
|
gint dest_pickable_off_y;
|
|
|
|
fade_point = gimp_paint_options_get_fade (paint_options, image,
|
|
paint_core->pixel_dist);
|
|
|
|
if (gimp_dynamics_is_output_enabled (dynamics, GIMP_DYNAMICS_OUTPUT_FORCE))
|
|
force = gimp_dynamics_get_linear_value (dynamics,
|
|
GIMP_DYNAMICS_OUTPUT_FORCE,
|
|
coords,
|
|
paint_options,
|
|
fade_point);
|
|
else
|
|
force = paint_options->brush_force;
|
|
|
|
mask_buf = gimp_brush_core_get_brush_mask (GIMP_BRUSH_CORE (source_core),
|
|
coords,
|
|
GIMP_BRUSH_HARD,
|
|
force);
|
|
|
|
if (! mask_buf)
|
|
return;
|
|
|
|
/* check that all buffers are of the same size */
|
|
if (src_rect->width != gegl_buffer_get_width (paint_buffer) ||
|
|
src_rect->height != gegl_buffer_get_height (paint_buffer))
|
|
{
|
|
/* this generally means that the source point has hit the edge
|
|
* of the layer, so it is not an error and we should not
|
|
* complain, just don't do anything
|
|
*/
|
|
return;
|
|
}
|
|
|
|
/* heal should work in perceptual space, use R'G'B' instead of RGB */
|
|
src_copy = gegl_buffer_new (GEGL_RECTANGLE (paint_area_offset_x,
|
|
paint_area_offset_y,
|
|
src_rect->width,
|
|
src_rect->height),
|
|
babl_format ("R'G'B'A float"));
|
|
|
|
if (! op)
|
|
{
|
|
gimp_gegl_buffer_copy (src_buffer, src_rect, GEGL_ABYSS_NONE,
|
|
src_copy, gegl_buffer_get_extent (src_copy));
|
|
}
|
|
else
|
|
{
|
|
gimp_gegl_apply_operation (src_buffer, NULL, NULL, op,
|
|
src_copy, gegl_buffer_get_extent (src_copy),
|
|
FALSE);
|
|
}
|
|
|
|
if (src_options->sample_merged)
|
|
{
|
|
dest_pickable = GIMP_PICKABLE (image);
|
|
|
|
gimp_item_get_offset (GIMP_ITEM (drawable),
|
|
&dest_pickable_off_x,
|
|
&dest_pickable_off_y);
|
|
}
|
|
else
|
|
{
|
|
dest_pickable = GIMP_PICKABLE (drawable);
|
|
|
|
dest_pickable_off_x = 0;
|
|
dest_pickable_off_y = 0;
|
|
}
|
|
|
|
gimp_gegl_buffer_copy (gimp_pickable_get_buffer (dest_pickable),
|
|
GEGL_RECTANGLE (paint_buffer_x + dest_pickable_off_x,
|
|
paint_buffer_y + dest_pickable_off_y,
|
|
gegl_buffer_get_width (paint_buffer),
|
|
gegl_buffer_get_height (paint_buffer)),
|
|
GEGL_ABYSS_NONE,
|
|
paint_buffer,
|
|
GEGL_RECTANGLE (paint_area_offset_x,
|
|
paint_area_offset_y,
|
|
paint_area_width,
|
|
paint_area_height));
|
|
|
|
mask_buffer = gimp_temp_buf_create_buffer ((GimpTempBuf *) mask_buf);
|
|
|
|
/* find the offset of the brush mask's rect */
|
|
{
|
|
gint x = (gint) floor (coords->x) - (gegl_buffer_get_width (mask_buffer) >> 1);
|
|
gint y = (gint) floor (coords->y) - (gegl_buffer_get_height (mask_buffer) >> 1);
|
|
|
|
mask_off_x = (x < 0) ? -x : 0;
|
|
mask_off_y = (y < 0) ? -y : 0;
|
|
}
|
|
|
|
gimp_heal (src_copy, gegl_buffer_get_extent (src_copy),
|
|
paint_buffer,
|
|
GEGL_RECTANGLE (paint_area_offset_x,
|
|
paint_area_offset_y,
|
|
paint_area_width,
|
|
paint_area_height),
|
|
mask_buffer,
|
|
GEGL_RECTANGLE (mask_off_x, mask_off_y,
|
|
paint_area_width,
|
|
paint_area_height));
|
|
|
|
g_object_unref (src_copy);
|
|
g_object_unref (mask_buffer);
|
|
|
|
/* replace the canvas with our healed data */
|
|
gimp_brush_core_replace_canvas (GIMP_BRUSH_CORE (paint_core), drawable,
|
|
coords,
|
|
MIN (opacity, GIMP_OPACITY_OPAQUE),
|
|
gimp_context_get_opacity (context),
|
|
gimp_paint_options_get_brush_mode (paint_options),
|
|
force,
|
|
GIMP_PAINT_INCREMENTAL);
|
|
}
|