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-rw-r--r--app/operations/gimpoperationborder.c748
1 files changed, 748 insertions, 0 deletions
diff --git a/app/operations/gimpoperationborder.c b/app/operations/gimpoperationborder.c
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index 0000000..e08481c
--- /dev/null
+++ b/app/operations/gimpoperationborder.c
@@ -0,0 +1,748 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationborder.c
+ * Copyright (C) 2012 Michael Natterer <mitch@gimp.org>
+ *
+ * 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 <cairo.h>
+#include <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "operations-types.h"
+
+#include "gimpoperationborder.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_RADIUS_X,
+ PROP_RADIUS_Y,
+ PROP_FEATHER,
+ PROP_EDGE_LOCK
+};
+
+
+static void gimp_operation_border_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gimp_operation_border_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+
+static GeglRectangle
+gimp_operation_border_get_required_for_output (GeglOperation *self,
+ const gchar *input_pad,
+ const GeglRectangle *roi);
+static GeglRectangle
+ gimp_operation_border_get_cached_region (GeglOperation *self,
+ const GeglRectangle *roi);
+static void gimp_operation_border_prepare (GeglOperation *operation);
+static gboolean gimp_operation_border_process (GeglOperation *operation,
+ GeglBuffer *input,
+ GeglBuffer *output,
+ const GeglRectangle *roi,
+ gint level);
+
+
+G_DEFINE_TYPE (GimpOperationBorder, gimp_operation_border,
+ GEGL_TYPE_OPERATION_FILTER)
+
+#define parent_class gimp_operation_border_parent_class
+
+
+static void
+gimp_operation_border_class_init (GimpOperationBorderClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
+ GeglOperationFilterClass *filter_class = GEGL_OPERATION_FILTER_CLASS (klass);
+
+ object_class->set_property = gimp_operation_border_set_property;
+ object_class->get_property = gimp_operation_border_get_property;
+
+ gegl_operation_class_set_keys (operation_class,
+ "name", "gimp:border",
+ "categories", "gimp",
+ "description", "GIMP Border operation",
+ NULL);
+
+ operation_class->prepare = gimp_operation_border_prepare;
+ operation_class->get_required_for_output = gimp_operation_border_get_required_for_output;
+ operation_class->get_cached_region = gimp_operation_border_get_cached_region;
+ operation_class->threaded = FALSE;
+
+ filter_class->process = gimp_operation_border_process;
+
+ g_object_class_install_property (object_class, PROP_RADIUS_X,
+ g_param_spec_int ("radius-x",
+ "Radius X",
+ "Border radius in X diection",
+ 1, 2342, 1,
+ G_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+
+ g_object_class_install_property (object_class, PROP_RADIUS_Y,
+ g_param_spec_int ("radius-y",
+ "Radius Y",
+ "Border radius in Y diection",
+ 1, 2342, 1,
+ G_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+
+ g_object_class_install_property (object_class, PROP_FEATHER,
+ g_param_spec_boolean ("feather",
+ "Feather",
+ "Feather the border",
+ FALSE,
+ G_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+
+ g_object_class_install_property (object_class, PROP_EDGE_LOCK,
+ g_param_spec_boolean ("edge-lock",
+ "Edge Lock",
+ "Shrink from border",
+ FALSE,
+ G_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+}
+
+static void
+gimp_operation_border_init (GimpOperationBorder *self)
+{
+}
+
+static void
+gimp_operation_border_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpOperationBorder *self = GIMP_OPERATION_BORDER (object);
+
+ switch (property_id)
+ {
+ case PROP_RADIUS_X:
+ g_value_set_int (value, self->radius_x);
+ break;
+
+ case PROP_RADIUS_Y:
+ g_value_set_int (value, self->radius_y);
+ break;
+
+ case PROP_FEATHER:
+ g_value_set_boolean (value, self->feather);
+ break;
+
+ case PROP_EDGE_LOCK:
+ g_value_set_boolean (value, self->edge_lock);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_operation_border_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpOperationBorder *self = GIMP_OPERATION_BORDER (object);
+
+ switch (property_id)
+ {
+ case PROP_RADIUS_X:
+ self->radius_x = g_value_get_int (value);
+ break;
+
+ case PROP_RADIUS_Y:
+ self->radius_y = g_value_get_int (value);
+ break;
+
+ case PROP_FEATHER:
+ self->feather = g_value_get_boolean (value);
+ break;
+
+ case PROP_EDGE_LOCK:
+ self->edge_lock = g_value_get_boolean (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_operation_border_prepare (GeglOperation *operation)
+{
+ const Babl *space = gegl_operation_get_source_space (operation, "input");
+ gegl_operation_set_format (operation, "input", babl_format_with_space ("Y float", space));
+ gegl_operation_set_format (operation, "output", babl_format_with_space ("Y float", space));
+}
+
+static GeglRectangle
+gimp_operation_border_get_required_for_output (GeglOperation *self,
+ const gchar *input_pad,
+ const GeglRectangle *roi)
+{
+ return *gegl_operation_source_get_bounding_box (self, "input");
+}
+
+static GeglRectangle
+gimp_operation_border_get_cached_region (GeglOperation *self,
+ const GeglRectangle *roi)
+{
+ return *gegl_operation_source_get_bounding_box (self, "input");
+}
+
+static inline void
+rotate_pointers (gfloat **p,
+ guint32 n)
+{
+ guint32 i;
+ gfloat *tmp;
+
+ tmp = p[0];
+
+ for (i = 0; i < n - 1; i++)
+ p[i] = p[i + 1];
+
+ p[i] = tmp;
+}
+
+/* Computes whether pixels in `buf[1]', if they are selected, have neighbouring
+ pixels that are unselected. Put result in `transition'. */
+static void
+compute_transition (gfloat *transition,
+ gfloat **buf,
+ gint32 width,
+ gboolean edge_lock)
+{
+ register gint32 x = 0;
+
+ if (width == 1)
+ {
+ if (buf[1][0] >= 0.5 && (buf[0][0] < 0.5 || buf[2][0] < 0.5))
+ transition[0] = 1.0;
+ else
+ transition[0] = 0.0;
+ return;
+ }
+
+ if (buf[1][0] >= 0.5 && edge_lock)
+ {
+ /* The pixel to the left (outside of the canvas) is considered selected,
+ so we check if there are any unselected pixels in neighbouring pixels
+ _on_ the canvas. */
+ if (buf[0][x] < 0.5 || buf[0][x + 1] < 0.5 ||
+ buf[1][x + 1] < 0.5 ||
+ buf[2][x] < 0.5 || buf[2][x + 1] < 0.5 )
+ {
+ transition[x] = 1.0;
+ }
+ else
+ {
+ transition[x] = 0.0;
+ }
+ }
+ else if (buf[1][0] >= 0.5 && !edge_lock)
+ {
+ /* We must not care about neighbouring pixels on the image canvas since
+ there always are unselected pixels to the left (which is outside of
+ the image canvas). */
+ transition[x] = 1.0;
+ }
+ else
+ {
+ transition[x] = 0.0;
+ }
+
+ for (x = 1; x < width - 1; x++)
+ {
+ if (buf[1][x] >= 0.5)
+ {
+ if (buf[0][x - 1] < 0.5 || buf[0][x] < 0.5 || buf[0][x + 1] < 0.5 ||
+ buf[1][x - 1] < 0.5 || buf[1][x + 1] < 0.5 ||
+ buf[2][x - 1] < 0.5 || buf[2][x] < 0.5 || buf[2][x + 1] < 0.5)
+ transition[x] = 1.0;
+ else
+ transition[x] = 0.0;
+ }
+ else
+ {
+ transition[x] = 0.0;
+ }
+ }
+
+ if (buf[1][width - 1] >= 0.5 && edge_lock)
+ {
+ /* The pixel to the right (outside of the canvas) is considered selected,
+ so we check if there are any unselected pixels in neighbouring pixels
+ _on_ the canvas. */
+ if ( buf[0][x - 1] < 0.5 || buf[0][x] < 0.5 ||
+ buf[1][x - 1] < 0.5 ||
+ buf[2][x - 1] < 0.5 || buf[2][x] < 0.5)
+ {
+ transition[width - 1] = 1.0;
+ }
+ else
+ {
+ transition[width - 1] = 0.0;
+ }
+ }
+ else if (buf[1][width - 1] >= 0.5 && !edge_lock)
+ {
+ /* We must not care about neighbouring pixels on the image canvas since
+ there always are unselected pixels to the right (which is outside of
+ the image canvas). */
+ transition[width - 1] = 1.0;
+ }
+ else
+ {
+ transition[width - 1] = 0.0;
+ }
+}
+
+static gboolean
+gimp_operation_border_process (GeglOperation *operation,
+ GeglBuffer *input,
+ GeglBuffer *output,
+ const GeglRectangle *roi,
+ gint level)
+{
+ /* This function has no bugs, but if you imagine some you can blame
+ * them on jaycox@gimp.org
+ */
+ GimpOperationBorder *self = GIMP_OPERATION_BORDER (operation);
+ const Babl *input_format = gegl_operation_get_format (operation, "input");
+ const Babl *output_format = gegl_operation_get_format (operation, "output");
+
+ gint32 i, j, x, y;
+
+ /* A cache used in the algorithm as it works its way down. `buf[1]' is the
+ current row. Thus, at algorithm initialization, `buf[0]' represents the
+ row 'above' the first row of the region. */
+ gfloat *buf[3];
+
+ /* The resulting selection is calculated row by row, and this buffer holds the
+ output for each individual row, on each iteration. */
+ gfloat *out;
+
+ /* Keeps track of transitional pixels (pixels that are selected and have
+ unselected neighbouring pixels). */
+ gfloat **transition;
+
+ /* TODO: Figure out role clearly in algorithm. */
+ gint16 *max;
+
+ /* TODO: Figure out role clearly in algorithm. */
+ gfloat **density;
+
+ gint16 last_index;
+
+ /* optimize this case specifically */
+ if (self->radius_x == 1 && self->radius_y == 1)
+ {
+ gfloat *transition;
+ gfloat *source[3];
+
+ for (i = 0; i < 3; i++)
+ source[i] = g_new (gfloat, roi->width);
+
+ transition = g_new (gfloat, roi->width);
+
+ /* With `self->edge_lock', initialize row above image as
+ * selected, otherwise, initialize as unselected.
+ */
+ if (self->edge_lock)
+ {
+ for (i = 0; i < roi->width; i++)
+ source[0][i] = 1.0;
+ }
+ else
+ {
+ memset (source[0], 0, roi->width * sizeof (gfloat));
+ }
+
+ gegl_buffer_get (input,
+ GEGL_RECTANGLE (roi->x, roi->y + 0,
+ roi->width, 1),
+ 1.0, input_format, source[1],
+ GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+ if (roi->height > 1)
+ gegl_buffer_get (input,
+ GEGL_RECTANGLE (roi->x, roi->y + 1,
+ roi->width, 1),
+ 1.0, input_format, source[2],
+ GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+ else
+ memcpy (source[2], source[1], roi->width * sizeof (gfloat));
+
+ compute_transition (transition, source, roi->width, self->edge_lock);
+ gegl_buffer_set (output,
+ GEGL_RECTANGLE (roi->x, roi->y,
+ roi->width, 1),
+ 0, output_format, transition,
+ GEGL_AUTO_ROWSTRIDE);
+
+ for (y = 1; y < roi->height; y++)
+ {
+ rotate_pointers (source, 3);
+
+ if (y + 1 < roi->height)
+ {
+ gegl_buffer_get (input,
+ GEGL_RECTANGLE (roi->x, roi->y + y + 1,
+ roi->width, 1),
+ 1.0, input_format, source[2],
+ GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+ }
+ else
+ {
+ /* Depending on `self->edge_lock', set the row below the
+ * image as either selected or non-selected.
+ */
+ if (self->edge_lock)
+ {
+ for (i = 0; i < roi->width; i++)
+ source[2][i] = 1.0;
+ }
+ else
+ {
+ memset (source[2], 0, roi->width * sizeof (gfloat));
+ }
+ }
+
+ compute_transition (transition, source, roi->width, self->edge_lock);
+ gegl_buffer_set (output,
+ GEGL_RECTANGLE (roi->x, roi->y + y,
+ roi->width, 1),
+ 0, output_format, transition,
+ GEGL_AUTO_ROWSTRIDE);
+ }
+
+ for (i = 0; i < 3; i++)
+ g_free (source[i]);
+
+ g_free (transition);
+
+ /* Finished handling the radius = 1 special case, return here. */
+ return TRUE;
+ }
+
+ max = g_new (gint16, roi->width + 2 * self->radius_x);
+
+ for (i = 0; i < (roi->width + 2 * self->radius_x); i++)
+ max[i] = self->radius_y + 2;
+
+ max += self->radius_x;
+
+ for (i = 0; i < 3; i++)
+ buf[i] = g_new (gfloat, roi->width);
+
+ transition = g_new (gfloat *, self->radius_y + 1);
+
+ for (i = 0; i < self->radius_y + 1; i++)
+ {
+ transition[i] = g_new (gfloat, roi->width + 2 * self->radius_x);
+ memset (transition[i], 0,
+ (roi->width + 2 * self->radius_x) * sizeof (gfloat));
+ transition[i] += self->radius_x;
+ }
+
+ out = g_new (gfloat, roi->width);
+
+ density = g_new (gfloat *, 2 * self->radius_x + 1);
+ density += self->radius_x;
+
+ /* allocate density[][] */
+ for (x = 0; x < (self->radius_x + 1); x++)
+ {
+ density[ x] = g_new (gfloat, 2 * self->radius_y + 1);
+ density[ x] += self->radius_y;
+ density[-x] = density[x];
+ }
+
+ /* compute density[][] */
+ for (x = 0; x < (self->radius_x + 1); x++)
+ {
+ gdouble tmpx, tmpy, dist;
+ gfloat a;
+
+ if (x > 0)
+ tmpx = x - 0.5;
+ else if (x < 0)
+ tmpx = x + 0.5;
+ else
+ tmpx = 0.0;
+
+ for (y = 0; y < (self->radius_y + 1); y++)
+ {
+ if (y > 0)
+ tmpy = y - 0.5;
+ else if (y < 0)
+ tmpy = y + 0.5;
+ else
+ tmpy = 0.0;
+
+ dist = ((tmpy * tmpy) / (self->radius_y * self->radius_y) +
+ (tmpx * tmpx) / (self->radius_x * self->radius_x));
+
+ if (dist < 1.0)
+ {
+ if (self->feather)
+ a = 1.0 - sqrt (dist);
+ else
+ a = 1.0;
+ }
+ else
+ {
+ a = 0.0;
+ }
+
+ density[ x][ y] = a;
+ density[ x][-y] = a;
+ density[-x][ y] = a;
+ density[-x][-y] = a;
+ }
+ }
+
+ /* Since the algorithm considerers `buf[0]' to be 'over' the row
+ * currently calculated, we must start with `buf[0]' as non-selected
+ * if there is no `self->edge_lock. If there is an
+ * 'self->edge_lock', initialize the first row to 'selected'. Refer
+ * to bug #350009.
+ */
+ if (self->edge_lock)
+ {
+ for (i = 0; i < roi->width; i++)
+ buf[0][i] = 1.0;
+ }
+ else
+ {
+ memset (buf[0], 0, roi->width * sizeof (gfloat));
+ }
+
+ gegl_buffer_get (input,
+ GEGL_RECTANGLE (roi->x, roi->y + 0,
+ roi->width, 1),
+ 1.0, input_format, buf[1],
+ GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+ if (roi->height > 1)
+ gegl_buffer_get (input,
+ GEGL_RECTANGLE (roi->x, roi->y + 1,
+ roi->width, 1),
+ 1.0, input_format, buf[2],
+ GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+ else
+ memcpy (buf[2], buf[1], roi->width * sizeof (gfloat));
+
+ compute_transition (transition[1], buf, roi->width, self->edge_lock);
+
+ /* set up top of image */
+ for (y = 1; y < self->radius_y && y + 1 < roi->height; y++)
+ {
+ rotate_pointers (buf, 3);
+ gegl_buffer_get (input,
+ GEGL_RECTANGLE (roi->x, roi->y + y + 1,
+ roi->width, 1),
+ 1.0, input_format, buf[2],
+ GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+ compute_transition (transition[y + 1], buf, roi->width, self->edge_lock);
+ }
+
+ /* set up max[] for top of image */
+ for (x = 0; x < roi->width; x++)
+ {
+ max[x] = -(self->radius_y + 7);
+
+ for (j = 1; j < self->radius_y + 1; j++)
+ if (transition[j][x])
+ {
+ max[x] = j;
+ break;
+ }
+ }
+
+ /* main calculation loop */
+ for (y = 0; y < roi->height; y++)
+ {
+ rotate_pointers (buf, 3);
+ rotate_pointers (transition, self->radius_y + 1);
+
+ if (y < roi->height - (self->radius_y + 1))
+ {
+ gegl_buffer_get (input,
+ GEGL_RECTANGLE (roi->x,
+ roi->y + y + self->radius_y + 1,
+ roi->width, 1),
+ 1.0, input_format, buf[2],
+ GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+ compute_transition (transition[self->radius_y], buf, roi->width, self->edge_lock);
+ }
+ else
+ {
+ if (self->edge_lock)
+ {
+ memcpy (transition[self->radius_y], transition[self->radius_y - 1], roi->width * sizeof (gfloat));
+ }
+ else
+ {
+ /* No edge lock, set everything 'below canvas' as seen
+ * from the algorithm as unselected.
+ */
+ memset (buf[2], 0, roi->width * sizeof (gfloat));
+ compute_transition (transition[self->radius_y], buf, roi->width, self->edge_lock);
+ }
+ }
+
+ /* update max array */
+ for (x = 0; x < roi->width; x++)
+ {
+ if (max[x] < 1)
+ {
+ if (max[x] <= -self->radius_y)
+ {
+ if (transition[self->radius_y][x])
+ max[x] = self->radius_y;
+ else
+ max[x]--;
+ }
+ else
+ {
+ if (transition[-max[x]][x])
+ max[x] = -max[x];
+ else if (transition[-max[x] + 1][x])
+ max[x] = -max[x] + 1;
+ else
+ max[x]--;
+ }
+ }
+ else
+ {
+ max[x]--;
+ }
+
+ if (max[x] < -self->radius_y - 1)
+ max[x] = -self->radius_y - 1;
+ }
+
+ last_index = 1;
+
+ /* render scan line */
+ for (x = 0 ; x < roi->width; x++)
+ {
+ gfloat last_max;
+
+ last_index--;
+
+ if (last_index >= 0)
+ {
+ last_max = 0.0;
+
+ for (i = self->radius_x; i >= 0; i--)
+ if (max[x + i] <= self->radius_y && max[x + i] >= -self->radius_y &&
+ density[i][max[x+i]] > last_max)
+ {
+ last_max = density[i][max[x + i]];
+ last_index = i;
+ }
+
+ out[x] = last_max;
+ }
+ else
+ {
+ last_max = 0.0;
+
+ for (i = self->radius_x; i >= -self->radius_x; i--)
+ if (max[x + i] <= self->radius_y && max[x + i] >= -self->radius_y &&
+ density[i][max[x + i]] > last_max)
+ {
+ last_max = density[i][max[x + i]];
+ last_index = i;
+ }
+
+ out[x] = last_max;
+ }
+
+ if (last_max <= 0.0)
+ {
+ for (i = x + 1; i < roi->width; i++)
+ {
+ if (max[i] >= -self->radius_y)
+ break;
+ }
+
+ if (i - x > self->radius_x)
+ {
+ for (; x < i - self->radius_x; x++)
+ out[x] = 0;
+
+ x--;
+ }
+
+ last_index = self->radius_x;
+ }
+ }
+
+ gegl_buffer_set (output,
+ GEGL_RECTANGLE (roi->x, roi->y + y,
+ roi->width, 1),
+ 0, output_format, out,
+ GEGL_AUTO_ROWSTRIDE);
+ }
+
+ g_free (out);
+
+ for (i = 0; i < 3; i++)
+ g_free (buf[i]);
+
+ max -= self->radius_x;
+ g_free (max);
+
+ for (i = 0; i < self->radius_y + 1; i++)
+ {
+ transition[i] -= self->radius_x;
+ g_free (transition[i]);
+ }
+
+ g_free (transition);
+
+ for (i = 0; i < self->radius_x + 1 ; i++)
+ {
+ density[i] -= self->radius_y;
+ g_free (density[i]);
+ }
+
+ density -= self->radius_x;
+ g_free (density);
+
+ return TRUE;
+}
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