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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:30:19 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:30:19 +0000
commit5c1676dfe6d2f3c837a5e074117b45613fd29a72 (patch)
treecbffb45144febf451e54061db2b21395faf94bfe /plug-ins/common/warp.c
parentInitial commit. (diff)
downloadgimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.tar.xz
gimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.zip
Adding upstream version 2.10.34.upstream/2.10.34upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'plug-ins/common/warp.c')
-rw-r--r--plug-ins/common/warp.c1793
1 files changed, 1793 insertions, 0 deletions
diff --git a/plug-ins/common/warp.c b/plug-ins/common/warp.c
new file mode 100644
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--- /dev/null
+++ b/plug-ins/common/warp.c
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+/* Warp --- image filter plug-in for GIMP
+ * Copyright (C) 1997 John P. Beale
+ * Much of the 'warp' is from the Displace plug-in: 1996 Stephen Robert Norris
+ * Much of the 'displace' code taken in turn from the pinch plug-in
+ * which is by 1996 Federico Mena Quintero
+ *
+ * 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/>.
+ *
+ * You can contact me (the warp author) at beale@best.com
+ * Please send me any patches or enhancements to this code.
+ * You can contact the original GIMP authors at gimp@xcf.berkeley.edu
+ *
+ * --------------------------------------------------------------------
+ * Warp Program structure: after running the user interface and setting the
+ * parameters, warp generates a brand-new image (later to be deleted
+ * before the user ever sees it) which contains two grayscale layers,
+ * representing the X and Y gradients of the "control" image. For this
+ * purpose, all channels of the control image are summed for a scalar
+ * value at each pixel coordinate for the gradient operation.
+ *
+ * The X,Y components of the calculated gradient are then used to
+ * displace pixels from the source image into the destination
+ * image. The displacement vector is rotated a user-specified amount
+ * first. This displacement operation happens iteratively, generating
+ * a new displaced image from each prior image.
+ * -------------------------------------------------------------------
+ *
+ * Revision History:
+ * Version 0.37 12/19/98 Fixed Tooltips and freeing memory
+ * Version 0.36 11/9/97 Changed XY vector layers back to own image
+ * fixed 'undo' problem (hopefully)
+ *
+ * Version 0.35 11/3/97 Added vector-map, mag-map, grad-map to
+ * diff vector instead of separate operation
+ * further futzing with drawable updates
+ * starting adding tooltips
+ *
+ * Version 0.34 10/30/97 'Fixed' drawable update problem
+ * Added 16-bit resolution to differential map
+ * Added substep increments for finer control
+ *
+ * Version 0.33 10/26/97 Added 'angle increment' to user interface
+ *
+ * Version 0.32 10/25/97 Added magnitude control map (secondary control)
+ * Changed undo behavior to be one undo-step per warp call.
+ *
+ * Version 0.31 10/25/97 Fixed src/dest pixregions so program works
+ * with multiple-layer images. Still don't know
+ * exactly what I did to fix it :-/ Also, added 'color' option
+ * for border pixels to use the current selected foreground color.
+ *
+ * Version 0.3 10/20/97 Initial release for Gimp 0.99.xx
+ */
+
+#include "config.h"
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "libgimp/stdplugins-intl.h"
+
+
+/* Some useful macros */
+
+#define PLUG_IN_PROC "plug-in-warp"
+#define PLUG_IN_BINARY "warp"
+#define PLUG_IN_ROLE "gimp-warp"
+#define ENTRY_WIDTH 75
+#define MIN_ARGS 6 /* minimum number of arguments required */
+
+enum
+{
+ WRAP,
+ SMEAR,
+ BLACK,
+ COLOR
+};
+
+typedef struct
+{
+ gdouble amount;
+ gint warp_map;
+ gint iter;
+ gdouble dither;
+ gdouble angle;
+ gint wrap_type;
+ gint mag_map;
+ gint mag_use;
+ gint substeps;
+ gint grad_map;
+ gdouble grad_scale;
+ gint vector_map;
+ gdouble vector_scale;
+ gdouble vector_angle;
+} WarpVals;
+
+
+/*
+ * Function prototypes.
+ */
+
+static void query (void);
+static void run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals);
+
+static void blur16 (gint32 drawable_id);
+
+static void diff (gint32 drawable_id,
+ gint32 *xl_id,
+ gint32 *yl_id);
+
+static void diff_prepare_row (GeglBuffer *buffer,
+ const Babl *format,
+ guchar *data,
+ gint x,
+ gint y,
+ gint w);
+
+static void warp_one (gint32 draw_id,
+ gint32 new_id,
+ gint32 map_x_id,
+ gint32 map_y_id,
+ gint32 mag_draw_id,
+ gboolean first_time,
+ gint step);
+
+static void warp (gint32 drawable_id);
+
+static gboolean warp_dialog (gint32 drawable_id);
+static void warp_pixel (GeglBuffer *buffer,
+ const Babl *format,
+ gint width,
+ gint height,
+ gint x1,
+ gint y1,
+ gint x2,
+ gint y2,
+ gint x,
+ gint y,
+ guchar *pixel);
+
+static gboolean warp_map_constrain (gint32 image_id,
+ gint32 drawable_id,
+ gpointer data);
+static gdouble warp_map_mag_give_value (guchar *pt,
+ gint alpha,
+ gint bytes);
+
+/* -------------------------------------------------------------------------- */
+/* Variables global over entire plug-in scope */
+/* -------------------------------------------------------------------------- */
+
+const GimpPlugInInfo PLUG_IN_INFO =
+{
+ NULL, /* init_proc */
+ NULL, /* quit_proc */
+ query, /* query_proc */
+ run, /* run_proc */
+};
+
+static WarpVals dvals =
+{
+ 10.0, /* amount */
+ -1, /* warp_map */
+ 5, /* iterations */
+ 0.0, /* dither */
+ 90.0, /* angle */
+ WRAP, /* wrap_type */
+ -1, /* mag_map */
+ FALSE, /* mag_use */
+ 1, /* substeps */
+ -1, /* grad_map */
+ 0.0, /* grad_scale */
+ -1, /* vector_map */
+ 0.0, /* vector_scale */
+ 0.0 /* vector_angle */
+};
+
+/* -------------------------------------------------------------------------- */
+
+static gint progress = 0; /* progress indicator bar */
+static GimpRunMode run_mode; /* interactive, non-, etc. */
+static guchar color_pixel[4] = {0, 0, 0, 255}; /* current fg color */
+
+/* -------------------------------------------------------------------------- */
+
+/***** Functions *****/
+
+MAIN ()
+
+static void
+query (void)
+{
+ static const GimpParamDef args[] =
+ {
+ { GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
+ { GIMP_PDB_IMAGE, "image", "Input image (unused)" },
+ { GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
+ { GIMP_PDB_FLOAT, "amount", "Pixel displacement multiplier" },
+ { GIMP_PDB_DRAWABLE, "warp-map", "Displacement control map" },
+ { GIMP_PDB_INT32, "iter", "Iteration count (last required argument)" },
+ { GIMP_PDB_FLOAT, "dither", "Random dither amount (first optional argument)" },
+ { GIMP_PDB_FLOAT, "angle", "Angle of gradient vector rotation" },
+ { GIMP_PDB_INT32, "wrap-type", "Edge behavior: { WRAP (0), SMEAR (1), BLACK (2), COLOR (3) }" },
+ { GIMP_PDB_DRAWABLE, "mag-map", "Magnitude control map" },
+ { GIMP_PDB_INT32, "mag-use", "Use magnitude map: { FALSE (0), TRUE (1) }" },
+ { GIMP_PDB_INT32, "substeps", "Substeps between image updates" },
+ { GIMP_PDB_INT32, "grad-map", "Gradient control map" },
+ { GIMP_PDB_FLOAT, "grad-scale", "Scaling factor for gradient map (0=don't use)" },
+ { GIMP_PDB_INT32, "vector-map", "Fixed vector control map" },
+ { GIMP_PDB_FLOAT, "vector-scale", "Scaling factor for fixed vector map (0=don't use)" },
+ { GIMP_PDB_FLOAT, "vector-angle", "Angle for fixed vector map" }
+ };
+
+ gimp_install_procedure (PLUG_IN_PROC,
+ N_("Twist or smear image in many different ways"),
+ "Smears an image along vector paths calculated as "
+ "the gradient of a separate control matrix. The "
+ "effect can look like brushstrokes of acrylic or "
+ "watercolor paint, in some cases.",
+ "John P. Beale",
+ "John P. Beale",
+ "1997",
+ N_("_Warp..."),
+ "RGB*, GRAY*",
+ GIMP_PLUGIN,
+ G_N_ELEMENTS (args), 0,
+ args, NULL);
+
+ gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Filters/Map");
+}
+
+static void
+run (const gchar *name,
+ gint nparams,
+ const GimpParam *param,
+ gint *nreturn_vals,
+ GimpParam **return_vals)
+{
+ static GimpParam values[1];
+ GimpPDBStatusType status = GIMP_PDB_SUCCESS;
+ gint32 drawable_id;
+ GimpRGB color;
+
+ INIT_I18N ();
+ gegl_init (NULL, NULL);
+
+ /* get currently selected foreground pixel color */
+ gimp_context_get_foreground (&color);
+ gimp_rgb_get_uchar (&color,
+ &color_pixel[0],
+ &color_pixel[1],
+ &color_pixel[2]);
+
+ run_mode = param[0].data.d_int32;
+ drawable_id = param[2].data.d_drawable;
+
+ *nreturn_vals = 1;
+ *return_vals = values;
+
+ values[0].type = GIMP_PDB_STATUS;
+ values[0].data.d_status = status;
+
+ switch (run_mode)
+ {
+ case GIMP_RUN_INTERACTIVE:
+ /* Possibly retrieve data */
+ gimp_get_data (PLUG_IN_PROC, &dvals);
+
+ /* First acquire information with a dialog */
+ if (! warp_dialog (drawable_id))
+ return;
+ break;
+
+ case GIMP_RUN_NONINTERACTIVE:
+ /* Make sure minimum args
+ * (mode, image, draw, amount, warp_map, iter) are there
+ */
+ if (nparams < MIN_ARGS)
+ {
+ status = GIMP_PDB_CALLING_ERROR;
+ }
+ else
+ {
+ gint pcnt = MIN_ARGS;
+
+ dvals.amount = param[3].data.d_float;
+ dvals.warp_map = param[4].data.d_int32;
+ dvals.iter = param[5].data.d_int32;
+
+ if (nparams > pcnt++) dvals.dither = param[6].data.d_float;
+ if (nparams > pcnt++) dvals.angle = param[7].data.d_float;
+ if (nparams > pcnt++) dvals.wrap_type = param[8].data.d_int32;
+ if (nparams > pcnt++) dvals.mag_map = param[9].data.d_int32;
+ if (nparams > pcnt++) dvals.mag_use = param[10].data.d_int32;
+ if (nparams > pcnt++) dvals.substeps = param[11].data.d_int32;
+ if (nparams > pcnt++) dvals.grad_map = param[12].data.d_int32;
+ if (nparams > pcnt++) dvals.grad_scale = param[13].data.d_float;
+ if (nparams > pcnt++) dvals.vector_map = param[14].data.d_int32;
+ if (nparams > pcnt++) dvals.vector_scale = param[15].data.d_float;
+ if (nparams > pcnt++) dvals.vector_angle = param[16].data.d_float;
+ }
+ break;
+
+ case GIMP_RUN_WITH_LAST_VALS:
+ /* Possibly retrieve data */
+ gimp_get_data (PLUG_IN_PROC, &dvals);
+ break;
+
+ default:
+ break;
+ }
+
+ if (status == GIMP_PDB_SUCCESS)
+ {
+ /* run the warp effect */
+ warp (drawable_id);
+
+ /* Store data */
+ if (run_mode == GIMP_RUN_INTERACTIVE)
+ gimp_set_data (PLUG_IN_PROC, &dvals, sizeof (WarpVals));
+ }
+
+ if (run_mode != GIMP_RUN_NONINTERACTIVE)
+ gimp_displays_flush ();
+
+ values[0].data.d_status = status;
+}
+
+static gboolean
+warp_dialog (gint32 drawable_id)
+{
+ GtkWidget *dlg;
+ GtkWidget *vbox;
+ GtkWidget *label;
+ GtkWidget *toggle;
+ GtkWidget *toggle_hbox;
+ GtkWidget *frame;
+ GtkWidget *table;
+ GtkWidget *spinbutton;
+ GtkObject *adj;
+ GtkWidget *combo;
+ GtkSizeGroup *label_group;
+ GtkSizeGroup *spin_group;
+ GSList *group = NULL;
+ gboolean run;
+
+ gimp_ui_init (PLUG_IN_BINARY, FALSE);
+
+ dlg = gimp_dialog_new (_("Warp"), PLUG_IN_ROLE,
+ NULL, 0,
+ gimp_standard_help_func, PLUG_IN_PROC,
+
+ _("_Cancel"), GTK_RESPONSE_CANCEL,
+ _("_OK"), GTK_RESPONSE_OK,
+
+ NULL);
+
+ gtk_dialog_set_alternative_button_order (GTK_DIALOG (dlg),
+ GTK_RESPONSE_OK,
+ GTK_RESPONSE_CANCEL,
+ -1);
+
+ gimp_window_set_transient (GTK_WINDOW (dlg));
+
+ vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+ gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
+ gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dlg))),
+ vbox, TRUE, TRUE, 0);
+ gtk_widget_show (vbox);
+
+ frame = gimp_frame_new (_("Basic Options"));
+ gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+ gtk_widget_show (frame);
+
+ table = gtk_table_new (3, 3, FALSE);
+ gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+ gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+ gtk_table_set_col_spacing (GTK_TABLE (table), 1, 12);
+ gtk_container_add (GTK_CONTAINER (frame), table);
+ gtk_widget_show (table);
+
+ spin_group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
+ label_group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
+
+ /* amount, iter */
+ spinbutton = gimp_spin_button_new (&adj, dvals.amount,
+ -1000, 1000, /* ??? */
+ 1, 10, 0, 1, 2);
+ gtk_size_group_add_widget (spin_group, spinbutton);
+ g_object_unref (spin_group);
+
+ label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
+ _("Step size:"), 0.0, 0.5,
+ spinbutton, 1, FALSE);
+ gtk_size_group_add_widget (label_group, label);
+ g_object_unref (label_group);
+
+ g_signal_connect (adj, "value-changed",
+ G_CALLBACK (gimp_double_adjustment_update),
+ &dvals.amount);
+
+ spinbutton = gimp_spin_button_new (&adj, dvals.iter,
+ 1, 100, 1, 5, 0, 1, 0);
+ gtk_size_group_add_widget (spin_group, spinbutton);
+
+ label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
+ _("Iterations:"), 0.0, 0.5,
+ spinbutton, 1, FALSE);
+ gtk_size_group_add_widget (label_group, label);
+
+ g_signal_connect (adj, "value-changed",
+ G_CALLBACK (gimp_int_adjustment_update),
+ &dvals.iter);
+
+ /* Displacement map menu */
+ label = gtk_label_new (_("Displacement map:"));
+ gtk_label_set_xalign (GTK_LABEL (label), 0.0);
+ gtk_label_set_yalign (GTK_LABEL (label), 1.0);
+ gtk_table_attach (GTK_TABLE (table), label, 2, 3, 0, 1,
+ GTK_FILL, GTK_FILL, 0, 0);
+ gtk_widget_show (label);
+
+ combo = gimp_drawable_combo_box_new (warp_map_constrain,
+ GINT_TO_POINTER (drawable_id));
+ gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), dvals.warp_map,
+ G_CALLBACK (gimp_int_combo_box_get_active),
+ &dvals.warp_map);
+
+ gtk_table_attach (GTK_TABLE (table), combo, 2, 3, 1, 2,
+ GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
+ gtk_widget_show (combo);
+
+ /* ======================================================================= */
+
+ /* Displacement Type */
+ label = gtk_label_new (_("On edges:"));
+ gtk_label_set_xalign (GTK_LABEL (label), 0.0);
+ gtk_table_attach (GTK_TABLE (table), label, 0, 1, 2, 3,
+ GTK_FILL, GTK_FILL, 0, 0);
+ gtk_widget_show (label);
+
+ toggle_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+ gtk_table_attach (GTK_TABLE (table), toggle_hbox, 1, 3, 2, 3,
+ GTK_FILL, GTK_FILL, 0, 0);
+ gtk_widget_show (toggle_hbox);
+
+ toggle = gtk_radio_button_new_with_label (group, _("Wrap"));
+ group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (toggle));
+ gtk_box_pack_start (GTK_BOX (toggle_hbox), toggle, FALSE, FALSE, 0);
+ gtk_widget_show (toggle);
+
+ g_object_set_data (G_OBJECT (toggle), "gimp-item-data",
+ GINT_TO_POINTER (WRAP));
+
+ g_signal_connect (toggle, "toggled",
+ G_CALLBACK (gimp_radio_button_update),
+ &dvals.wrap_type);
+
+ gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
+ dvals.wrap_type == WRAP);
+
+ toggle = gtk_radio_button_new_with_label (group, _("Smear"));
+ group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (toggle));
+ gtk_box_pack_start (GTK_BOX (toggle_hbox), toggle, FALSE, FALSE, 0);
+ gtk_widget_show (toggle);
+
+ g_object_set_data (G_OBJECT (toggle), "gimp-item-data",
+ GINT_TO_POINTER (SMEAR));
+
+ g_signal_connect (toggle, "toggled",
+ G_CALLBACK (gimp_radio_button_update),
+ &dvals.wrap_type);
+
+ gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
+ dvals.wrap_type == SMEAR);
+
+ toggle = gtk_radio_button_new_with_label (group, _("Black"));
+ group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (toggle));
+ gtk_box_pack_start (GTK_BOX (toggle_hbox), toggle, FALSE, FALSE, 0);
+ gtk_widget_show (toggle);
+
+ g_object_set_data (G_OBJECT (toggle), "gimp-item-data",
+ GINT_TO_POINTER (BLACK));
+
+ g_signal_connect (toggle, "toggled",
+ G_CALLBACK (gimp_radio_button_update),
+ &dvals.wrap_type);
+
+ gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
+ dvals.wrap_type == BLACK);
+
+ toggle = gtk_radio_button_new_with_label (group, _("Foreground color"));
+ group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (toggle));
+ gtk_box_pack_start (GTK_BOX (toggle_hbox), toggle, FALSE, FALSE, 0);
+ gtk_widget_show (toggle);
+
+ g_object_set_data (G_OBJECT (toggle), "gimp-item-data",
+ GINT_TO_POINTER (COLOR));
+
+ g_signal_connect (toggle, "toggled",
+ G_CALLBACK (gimp_radio_button_update),
+ &dvals.wrap_type);
+
+ gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
+ dvals.wrap_type == COLOR);
+
+
+
+ /* -------------------------------------------------------------------- */
+ /* --------- The secondary table -------------------------- */
+
+ frame = gimp_frame_new (_("Advanced Options"));
+ gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+ gtk_widget_show (frame);
+
+ table = gtk_table_new (3, 3, FALSE);
+ gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+ gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+ gtk_table_set_col_spacing (GTK_TABLE (table), 1, 12);
+ gtk_container_add (GTK_CONTAINER (frame), table);
+ gtk_widget_show (table);
+
+ spinbutton = gimp_spin_button_new (&adj, dvals.dither,
+ 0, 100, 1, 10, 0, 1, 2);
+ gtk_size_group_add_widget (spin_group, spinbutton);
+
+ label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
+ _("Dither size:"), 0.0, 0.5,
+ spinbutton, 1, FALSE);
+ gtk_size_group_add_widget (label_group, label);
+
+ g_signal_connect (adj, "value-changed",
+ G_CALLBACK (gimp_double_adjustment_update),
+ &dvals.dither);
+
+ spinbutton = gimp_spin_button_new (&adj, dvals.angle,
+ 0, 360, 1, 15, 0, 1, 1);
+ gtk_size_group_add_widget (spin_group, spinbutton);
+
+ label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
+ _("Rotation angle:"), 0.0, 0.5,
+ spinbutton, 1, FALSE);
+ gtk_size_group_add_widget (label_group, label);
+
+ g_signal_connect (adj, "value-changed",
+ G_CALLBACK (gimp_double_adjustment_update),
+ &dvals.angle);
+
+ spinbutton = gimp_spin_button_new (&adj, dvals.substeps,
+ 1, 100, 1, 5, 0, 1, 0);
+ gtk_size_group_add_widget (spin_group, spinbutton);
+
+ label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 2,
+ _("Substeps:"), 0.0, 0.5,
+ spinbutton, 1, FALSE);
+ gtk_size_group_add_widget (label_group, label);
+
+ g_signal_connect (adj, "value-changed",
+ G_CALLBACK (gimp_int_adjustment_update),
+ &dvals.substeps);
+
+ /* Magnitude map menu */
+ label = gtk_label_new (_("Magnitude map:"));
+ gtk_label_set_xalign (GTK_LABEL (label), 0.0);
+ gtk_label_set_yalign (GTK_LABEL (label), 1.0);
+ gtk_table_attach (GTK_TABLE (table), label, 2, 3, 0, 1,
+ GTK_FILL, GTK_FILL, 0, 0);
+ gtk_widget_show (label);
+
+ combo = gimp_drawable_combo_box_new (warp_map_constrain,
+ GINT_TO_POINTER (drawable_id));
+ gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), dvals.mag_map,
+ G_CALLBACK (gimp_int_combo_box_get_active),
+ &dvals.mag_map);
+
+ gtk_table_attach (GTK_TABLE (table), combo, 2, 3, 1, 2,
+ GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
+ gtk_widget_show (combo);
+
+ /* Magnitude Usage */
+ toggle_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
+ gtk_container_set_border_width (GTK_CONTAINER (toggle_hbox), 1);
+ gtk_table_attach (GTK_TABLE (table), toggle_hbox, 2, 3, 2, 3,
+ GTK_FILL, GTK_FILL, 0, 0);
+ gtk_widget_show (toggle_hbox);
+
+ toggle = gtk_check_button_new_with_label (_("Use magnitude map"));
+ gtk_box_pack_start (GTK_BOX (toggle_hbox), toggle, FALSE, FALSE, 0);
+ gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), dvals.mag_use);
+ gtk_widget_show (toggle);
+
+ g_signal_connect (toggle, "toggled",
+ G_CALLBACK (gimp_toggle_button_update),
+ &dvals.mag_use);
+
+
+ /* -------------------------------------------------------------------- */
+ /* --------- The "other" table -------------------------- */
+
+ frame = gimp_frame_new (_("More Advanced Options"));
+ gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+ gtk_widget_show (frame);
+
+ table = gtk_table_new (3, 3, FALSE);
+ gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+ gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+ gtk_table_set_col_spacing (GTK_TABLE (table), 1, 12);
+ gtk_container_add (GTK_CONTAINER (frame), table);
+ gtk_widget_show (table);
+
+ spinbutton = gimp_spin_button_new (&adj, dvals.grad_scale,
+ -1000, 1000, /* ??? */
+ 0.01, 0.1, 0, 1, 3);
+ gtk_size_group_add_widget (spin_group, spinbutton);
+
+ label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
+ _("Gradient scale:"), 0.0, 0.5,
+ spinbutton, 1, FALSE);
+ gtk_size_group_add_widget (label_group, label);
+
+ g_signal_connect (adj, "value-changed",
+ G_CALLBACK (gimp_double_adjustment_update),
+ &dvals.grad_scale);
+
+ /* --------- Gradient map menu ---------------- */
+
+ combo = gimp_drawable_combo_box_new (warp_map_constrain,
+ GINT_TO_POINTER (drawable_id));
+ gtk_table_attach (GTK_TABLE (table), combo, 2, 3, 0, 1,
+ GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
+ gtk_widget_show (combo);
+
+ gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), dvals.grad_map,
+ G_CALLBACK (gimp_int_combo_box_get_active),
+ &dvals.grad_map);
+
+ gimp_help_set_help_data (combo, _("Gradient map selection menu"), NULL);
+
+ /* ---------------------------------------------- */
+
+ spinbutton = gimp_spin_button_new (&adj, dvals.vector_scale,
+ -1000, 1000, /* ??? */
+ 0.01, 0.1, 0, 1, 3);
+ gtk_size_group_add_widget (spin_group, spinbutton);
+
+ label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
+ _("Vector mag:"), 0.0, 0.5,
+ spinbutton, 1, FALSE);
+ gtk_size_group_add_widget (label_group, label);
+
+ g_signal_connect (adj, "value-changed",
+ G_CALLBACK (gimp_double_adjustment_update),
+ &dvals.vector_scale);
+
+ /* -------------------------------------------------------- */
+
+ spinbutton = gimp_spin_button_new (&adj, dvals.vector_angle,
+ 0, 360, 1, 15, 0, 1, 1);
+ gtk_size_group_add_widget (spin_group, spinbutton);
+
+ label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 2,
+ _("Angle:"), 0.0, 0.5,
+ spinbutton, 1, FALSE);
+ gtk_size_group_add_widget (label_group, label);
+
+ g_signal_connect (adj, "value-changed",
+ G_CALLBACK (gimp_double_adjustment_update),
+ &dvals.vector_angle);
+
+ /* --------- Vector map menu ---------------- */
+ combo = gimp_drawable_combo_box_new (warp_map_constrain,
+ GINT_TO_POINTER (drawable_id));
+ gtk_table_attach (GTK_TABLE (table), combo, 2, 3, 1, 2,
+ GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
+ gtk_widget_show (combo);
+
+ gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo), dvals.vector_map,
+ G_CALLBACK (gimp_int_combo_box_get_active),
+ &dvals.vector_map);
+
+ gimp_help_set_help_data (combo,
+ _("Fixed-direction-vector map selection menu"),
+ NULL);
+
+ gtk_widget_show (dlg);
+
+ run = (gimp_dialog_run (GIMP_DIALOG (dlg)) == GTK_RESPONSE_OK);
+
+ gtk_widget_destroy (dlg);
+
+ return run;
+}
+
+/* ---------------------------------------------------------------------- */
+
+static const Babl *
+get_u8_format (gint32 drawable_id)
+{
+ if (gimp_drawable_is_rgb (drawable_id))
+ {
+ if (gimp_drawable_has_alpha (drawable_id))
+ return babl_format ("R'G'B'A u8");
+ else
+ return babl_format ("R'G'B' u8");
+ }
+ else
+ {
+ if (gimp_drawable_has_alpha (drawable_id))
+ return babl_format ("Y'A u8");
+ else
+ return babl_format ("Y' u8");
+ }
+}
+
+static void
+blur16 (gint32 drawable_id)
+{
+ /* blur a 2-or-more byte-per-pixel drawable,
+ * 1st 2 bytes interpreted as a 16-bit height field.
+ */
+ GeglBuffer *src_buffer;
+ GeglBuffer *dest_buffer;
+ const Babl *format;
+ gint width, height;
+ gint src_bytes;
+ gint dest_bytes;
+ gint dest_bytes_inc;
+ gint offb, off1;
+
+ guchar *dest, *d; /* pointers to rows of X and Y diff. data */
+ guchar *prev_row, *pr;
+ guchar *cur_row, *cr;
+ guchar *next_row, *nr;
+ guchar *tmp;
+ gint row, col; /* relating to indexing into pixel row arrays */
+ gint x1, y1, x2, y2;
+ gdouble pval; /* average pixel value of pixel & neighbors */
+
+ /* --------------------------------------- */
+
+ if (! gimp_drawable_mask_intersect (drawable_id,
+ &x1, &y1, &width, &height))
+ return;
+
+ x2 = x1 + width;
+ y2 = y1 + height;
+
+ width = gimp_drawable_width (drawable_id); /* size of input drawable*/
+ height = gimp_drawable_height (drawable_id);
+
+ format = get_u8_format (drawable_id);
+
+ /* bytes per pixel in SOURCE drawable, must be 2 or more */
+ src_bytes = babl_format_get_bytes_per_pixel (format);
+
+ dest_bytes = src_bytes; /* bytes per pixel in SOURCE drawable, >= 2 */
+ dest_bytes_inc = dest_bytes - 2; /* this is most likely zero, but I guess it's more conservative... */
+
+ /* allocate row buffers for source & dest. data */
+
+ prev_row = g_new (guchar, (x2 - x1 + 2) * src_bytes);
+ cur_row = g_new (guchar, (x2 - x1 + 2) * src_bytes);
+ next_row = g_new (guchar, (x2 - x1 + 2) * src_bytes);
+ dest = g_new (guchar, (x2 - x1) * src_bytes);
+
+ /* initialize the pixel regions (read from source, write into dest) */
+ src_buffer = gimp_drawable_get_buffer (drawable_id);
+ dest_buffer = gimp_drawable_get_shadow_buffer (drawable_id);
+
+ pr = prev_row + src_bytes; /* row arrays are prepared for indexing to -1 (!) */
+ cr = cur_row + src_bytes;
+ nr = next_row + src_bytes;
+
+ diff_prepare_row (src_buffer, format, pr, x1, y1, (x2 - x1));
+ diff_prepare_row (src_buffer, format, cr, x1, y1+1, (x2 - x1));
+
+ /* loop through the rows, applying the smoothing function */
+ for (row = y1; row < y2; row++)
+ {
+ /* prepare the next row */
+ diff_prepare_row (src_buffer, format, nr, x1, row + 1, (x2 - x1));
+
+ d = dest;
+ for (col = 0; col < (x2 - x1); col++) /* over columns of pixels */
+ {
+ offb = col*src_bytes; /* base of byte pointer offset */
+ off1 = offb+1; /* offset into row arrays */
+
+ pval = (256.0 * pr[offb - src_bytes] + pr[off1 - src_bytes] +
+ 256.0 * pr[offb] + pr[off1] +
+ 256.0 * pr[offb + src_bytes] + pr[off1 + src_bytes] +
+ 256.0 * cr[offb - src_bytes] + cr[off1 - src_bytes] +
+ 256.0 * cr[offb] + cr[off1] +
+ 256.0 * cr[offb + src_bytes] + cr[off1 + src_bytes] +
+ 256.0 * nr[offb - src_bytes] + nr[off1 - src_bytes] +
+ 256.0 * nr[offb] + nr[off1] +
+ 256.0 * nr[offb + src_bytes]) + nr[off1 + src_bytes];
+
+ pval /= 9.0; /* take the average */
+ *d++ = (guchar) (((gint) pval) >> 8); /* high-order byte */
+ *d++ = (guchar) (((gint) pval) % 256); /* low-order byte */
+ d += dest_bytes_inc; /* move data pointer on to next destination pixel */
+ }
+
+ /* store the dest */
+ gegl_buffer_set (dest_buffer, GEGL_RECTANGLE (x1, row, (x2 - x1), 1), 0,
+ format, dest,
+ GEGL_AUTO_ROWSTRIDE);
+
+ /* shuffle the row pointers */
+ tmp = pr;
+ pr = cr;
+ cr = nr;
+ nr = tmp;
+
+ if ((row % 8) == 0)
+ gimp_progress_update ((double) row / (double) (y2 - y1));
+ }
+
+ g_object_unref (src_buffer);
+ g_object_unref (dest_buffer);
+
+ gimp_progress_update (1.0);
+
+ gimp_drawable_merge_shadow (drawable_id, TRUE);
+ gimp_drawable_update (drawable_id, x1, y1, (x2 - x1), (y2 - y1));
+
+ g_free (prev_row); /* row buffers allocated at top of fn. */
+ g_free (cur_row);
+ g_free (next_row);
+ g_free (dest);
+
+}
+
+
+/* ====================================================================== */
+/* Get one row of pixels from the PixelRegion and put them in 'data' */
+
+static void
+diff_prepare_row (GeglBuffer *buffer,
+ const Babl *format,
+ guchar *data,
+ gint x,
+ gint y,
+ gint w)
+{
+ gint bpp = babl_format_get_bytes_per_pixel (format);
+ gint b;
+
+ /* y = CLAMP (y, 0, pixel_rgn->h - 1); FIXME? */
+
+ gegl_buffer_get (buffer, GEGL_RECTANGLE (x, y, w, 1), 1.0,
+ format, data,
+ GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
+
+ /* Fill in edge pixels */
+ for (b = 0; b < bpp; b++)
+ {
+ data[b - (gint) bpp] = data[b];
+ data[w * bpp + b] = data[(w - 1) * bpp + b];
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+/* 'diff' combines the input drawables to prepare the two */
+/* 16-bit (X,Y) vector displacement maps */
+/* -------------------------------------------------------------------------- */
+
+static void
+diff (gint32 drawable_id,
+ gint32 *xl_id,
+ gint32 *yl_id)
+{
+ gint32 draw_xd_id;
+ gint32 draw_yd_id; /* vector disp. drawables */
+ gint32 mdraw_id;
+ gint32 vdraw_id;
+ gint32 gdraw_id;
+ gint32 image_id; /* image holding X and Y diff. arrays */
+ gint32 new_image_id; /* image holding X and Y diff. layers */
+ gint32 layer_active; /* currently active layer */
+ gint32 xlayer_id, ylayer_id; /* individual X and Y layer ID numbers */
+ GeglBuffer *src_buffer;
+ GeglBuffer *destx_buffer;
+ const Babl *destx_format;
+ GeglBuffer *desty_buffer;
+ const Babl *desty_format;
+ GeglBuffer *vec_buffer;
+ GeglBuffer *mag_buffer = NULL;
+ GeglBuffer *grad_buffer;
+ gint width, height;
+ const Babl *src_format;
+ gint src_bytes;
+ const Babl *mformat = NULL;
+ gint mbytes = 0;
+ const Babl *vformat = NULL;
+ gint vbytes = 0;
+ const Babl *gformat = NULL;
+ gint gbytes = 0; /* bytes-per-pixel of various source drawables */
+ const Babl *dest_format;
+ gint dest_bytes;
+ gint dest_bytes_inc;
+ gint do_gradmap = FALSE; /* whether to add in gradient of gradmap to final diff. map */
+ gint do_vecmap = FALSE; /* whether to add in a fixed vector scaled by the vector map */
+ gint do_magmap = FALSE; /* whether to multiply result by the magnitude map */
+
+ guchar *destx, *dx, *desty, *dy; /* pointers to rows of X and Y diff. data */
+ guchar *tmp;
+ guchar *prev_row, *pr;
+ guchar *cur_row, *cr;
+ guchar *next_row, *nr;
+ guchar *prev_row_g, *prg = NULL; /* pointers to gradient map data */
+ guchar *cur_row_g, *crg = NULL;
+ guchar *next_row_g, *nrg = NULL;
+ guchar *cur_row_v, *crv = NULL; /* pointers to vector map data */
+ guchar *cur_row_m, *crm = NULL; /* pointers to magnitude map data */
+ gint row, col, offb, off, bytes; /* relating to indexing into pixel row arrays */
+ gint x1, y1, x2, y2;
+ gint dvalx, dvaly; /* differential value at particular pixel */
+ gdouble tx, ty; /* temporary x,y differential value increments from gradmap, etc. */
+ gdouble rdx, rdy; /* x,y differential values: real #s */
+ gdouble rscalefac; /* scaling factor for x,y differential of 'curl' map */
+ gdouble gscalefac; /* scaling factor for x,y differential of 'gradient' map */
+ gdouble r, theta, dtheta; /* rectangular<-> spherical coordinate transform for vector rotation */
+ gdouble scale_vec_x, scale_vec_y; /* fixed vector X,Y component scaling factors */
+
+ /* ----------------------------------------------------------------------- */
+
+ if (dvals.grad_scale != 0.0)
+ do_gradmap = TRUE; /* add in gradient of gradmap if scale != 0.000 */
+
+ if (dvals.vector_scale != 0.0) /* add in gradient of vectormap if scale != 0.000 */
+ do_vecmap = TRUE;
+
+ do_magmap = (dvals.mag_use == TRUE); /* multiply by magnitude map if so requested */
+
+ /* Get the input area. This is the bounding box of the selection in
+ * the image (or the entire image if there is no selection). Only
+ * operating on the input area is simply an optimization. It doesn't
+ * need to be done for correct operation. (It simply makes it go
+ * faster, since fewer pixels need to be operated on).
+ */
+ if (! gimp_drawable_mask_intersect (drawable_id,
+ &x1, &y1, &width, &height))
+ return;
+
+ x2 = x1 + width;
+ y2 = y1 + height;
+
+ /* Get the size of the input image. (This will/must be the same
+ * as the size of the output image.
+ */
+ width = gimp_drawable_width (drawable_id);
+ height = gimp_drawable_height (drawable_id);
+
+ src_format = get_u8_format (drawable_id);
+ src_bytes = babl_format_get_bytes_per_pixel (src_format);
+
+ /* -- Add two layers: X and Y Displacement vectors -- */
+ /* -- I'm using a RGB drawable and using the first two bytes for a
+ 16-bit pixel value. This is either clever, or a kluge,
+ depending on your point of view. */
+
+ image_id = gimp_item_get_image (drawable_id);
+ layer_active = gimp_image_get_active_layer (image_id);
+
+ /* create new image for X,Y diff */
+ new_image_id = gimp_image_new (width, height, GIMP_RGB);
+
+ xlayer_id = gimp_layer_new (new_image_id, "Warp_X_Vectors",
+ width, height,
+ GIMP_RGB_IMAGE,
+ 100.0,
+ gimp_image_get_default_new_layer_mode (new_image_id));
+
+ ylayer_id = gimp_layer_new (new_image_id, "Warp_Y_Vectors",
+ width, height,
+ GIMP_RGB_IMAGE,
+ 100.0,
+ gimp_image_get_default_new_layer_mode (new_image_id));
+
+ draw_yd_id = ylayer_id;
+ draw_xd_id = xlayer_id;
+
+ gimp_image_insert_layer (new_image_id, xlayer_id, -1, 1);
+ gimp_image_insert_layer (new_image_id, ylayer_id, -1, 1);
+ gimp_drawable_fill (xlayer_id, GIMP_FILL_BACKGROUND);
+ gimp_drawable_fill (ylayer_id, GIMP_FILL_BACKGROUND);
+ gimp_image_set_active_layer (image_id, layer_active);
+
+ dest_format = get_u8_format (draw_xd_id);
+ dest_bytes = babl_format_get_bytes_per_pixel (dest_format);
+ /* for a GRAYA drawable, I would expect this to be two bytes; any more would be excess */
+ dest_bytes_inc = dest_bytes - 2;
+
+ /* allocate row buffers for source & dest. data */
+
+ prev_row = g_new (guchar, (x2 - x1 + 2) * src_bytes);
+ cur_row = g_new (guchar, (x2 - x1 + 2) * src_bytes);
+ next_row = g_new (guchar, (x2 - x1 + 2) * src_bytes);
+
+ prev_row_g = g_new (guchar, (x2 - x1 + 2) * src_bytes);
+ cur_row_g = g_new (guchar, (x2 - x1 + 2) * src_bytes);
+ next_row_g = g_new (guchar, (x2 - x1 + 2) * src_bytes);
+
+ cur_row_v = g_new (guchar, (x2 - x1 + 2) * src_bytes); /* vector map */
+ cur_row_m = g_new (guchar, (x2 - x1 + 2) * src_bytes); /* magnitude map */
+
+ destx = g_new (guchar, (x2 - x1) * dest_bytes);
+ desty = g_new (guchar, (x2 - x1) * dest_bytes);
+
+ /* initialize the source and destination pixel regions */
+
+ /* 'curl' vector-rotation input */
+ src_buffer = gimp_drawable_get_buffer (drawable_id);
+
+ /* destination: X diff output */
+ destx_buffer = gimp_drawable_get_buffer (draw_xd_id);
+ destx_format = get_u8_format (draw_xd_id);
+
+ /* Y diff output */
+ desty_buffer = gimp_drawable_get_buffer (draw_yd_id);
+ desty_format = get_u8_format (draw_yd_id);
+
+ pr = prev_row + src_bytes;
+ cr = cur_row + src_bytes;
+ nr = next_row + src_bytes;
+
+ diff_prepare_row (src_buffer, src_format, pr, x1, y1, (x2 - x1));
+ diff_prepare_row (src_buffer, src_format, cr, x1, y1+1, (x2 - x1));
+
+ /* fixed-vector (x,y) component scale factors */
+ scale_vec_x = (dvals.vector_scale *
+ cos ((90 - dvals.vector_angle) * G_PI / 180.0) * 256.0 / 10);
+ scale_vec_y = (dvals.vector_scale *
+ sin ((90 - dvals.vector_angle) * G_PI / 180.0) * 256.0 / 10);
+
+ if (do_vecmap)
+ {
+ vdraw_id = dvals.vector_map;
+
+ /* bytes per pixel in SOURCE drawable */
+ vformat = get_u8_format (vdraw_id);
+ vbytes = babl_format_get_bytes_per_pixel (vformat);
+
+ /* fixed-vector scale-map */
+ vec_buffer = gimp_drawable_get_buffer (vdraw_id);
+
+ crv = cur_row_v + vbytes;
+ diff_prepare_row (vec_buffer, vformat, crv, x1, y1, (x2 - x1));
+ }
+
+ if (do_gradmap)
+ {
+ gdraw_id = dvals.grad_map;
+
+ gformat = get_u8_format (gdraw_id);
+ gbytes = babl_format_get_bytes_per_pixel (gformat);
+
+ /* fixed-vector scale-map */
+ grad_buffer = gimp_drawable_get_buffer (gdraw_id);
+
+ prg = prev_row_g + gbytes;
+ crg = cur_row_g + gbytes;
+ nrg = next_row_g + gbytes;
+ diff_prepare_row (grad_buffer, gformat, prg, x1, y1 - 1, (x2 - x1));
+ diff_prepare_row (grad_buffer, gformat, crg, x1, y1, (x2 - x1));
+ }
+
+ if (do_magmap)
+ {
+ mdraw_id = dvals.mag_map;
+
+ mformat = get_u8_format (mdraw_id);
+ mbytes = babl_format_get_bytes_per_pixel (mformat);
+
+ /* fixed-vector scale-map */
+ mag_buffer = gimp_drawable_get_buffer (mdraw_id);
+
+ crm = cur_row_m + mbytes;
+ diff_prepare_row (mag_buffer, mformat, crm, x1, y1, (x2 - x1));
+ }
+
+ dtheta = dvals.angle * G_PI / 180.0;
+ /* note that '3' is rather arbitrary here. */
+ rscalefac = 256.0 / (3 * src_bytes);
+ /* scale factor for gradient map components */
+ gscalefac = dvals.grad_scale * 256.0 / (3 * gbytes);
+
+ /* loop through the rows, applying the differential convolution */
+ for (row = y1; row < y2; row++)
+ {
+ /* prepare the next row */
+ diff_prepare_row (src_buffer, src_format, nr, x1, row + 1, (x2 - x1));
+
+ if (do_magmap)
+ diff_prepare_row (mag_buffer, mformat, crm, x1, row + 1, (x2 - x1));
+ if (do_vecmap)
+ diff_prepare_row (vec_buffer, vformat, crv, x1, row + 1, (x2 - x1));
+ if (do_gradmap)
+ diff_prepare_row (grad_buffer, gformat, crg, x1, row + 1, (x2 - x1));
+
+ dx = destx;
+ dy = desty;
+
+ for (col = 0; col < (x2 - x1); col++) /* over columns of pixels */
+ {
+ rdx = 0.0;
+ rdy = 0.0;
+ ty = 0.0;
+ tx = 0.0;
+
+ offb = col * src_bytes; /* base of byte pointer offset */
+ for (bytes=0; bytes < src_bytes; bytes++) /* add all channels together */
+ {
+ off = offb+bytes; /* offset into row arrays */
+ rdx += ((gint) -pr[off - src_bytes] + (gint) pr[off + src_bytes] +
+ (gint) -2*cr[off - src_bytes] + (gint) 2*cr[off + src_bytes] +
+ (gint) -nr[off - src_bytes] + (gint) nr[off + src_bytes]);
+
+ rdy += ((gint) -pr[off - src_bytes] - (gint)2*pr[off] - (gint) pr[off + src_bytes] +
+ (gint) nr[off - src_bytes] + (gint)2*nr[off] + (gint) nr[off + src_bytes]);
+ }
+
+ rdx *= rscalefac; /* take average, then reduce. Assume max. rdx now 65535 */
+ rdy *= rscalefac; /* take average, then reduce */
+
+ theta = atan2(rdy,rdx); /* convert to polar, then back to rectang. coords */
+ r = sqrt(rdy*rdy + rdx*rdx);
+ theta += dtheta; /* rotate gradient vector by this angle (radians) */
+ rdx = r * cos(theta);
+ rdy = r * sin(theta);
+
+ if (do_gradmap)
+ {
+ offb = col*gbytes; /* base of byte pointer offset into pixel values (R,G,B,Alpha, etc.) */
+ for (bytes=0; bytes < src_bytes; bytes++) /* add all channels together */
+ {
+ off = offb+bytes; /* offset into row arrays */
+ tx += ((gint) -prg[off - gbytes] + (gint) prg[off + gbytes] +
+ (gint) -2*crg[off - gbytes] + (gint) 2*crg[off + gbytes] +
+ (gint) -nrg[off - gbytes] + (gint) nrg[off + gbytes]);
+
+ ty += ((gint) -prg[off - gbytes] - (gint)2*prg[off] - (gint) prg[off + gbytes] +
+ (gint) nrg[off - gbytes] + (gint)2*nrg[off] + (gint) nrg[off + gbytes]);
+ }
+ tx *= gscalefac;
+ ty *= gscalefac;
+
+ rdx += tx; /* add gradient component in to the other one */
+ rdy += ty;
+
+ } /* if (do_gradmap) */
+
+ if (do_vecmap)
+ { /* add in fixed vector scaled by vec. map data */
+ tx = (gdouble) crv[col*vbytes]; /* use first byte only */
+ rdx += scale_vec_x * tx;
+ rdy += scale_vec_y * tx;
+ } /* if (do_vecmap) */
+
+ if (do_magmap)
+ { /* multiply result by mag. map data */
+ tx = (gdouble) crm[col*mbytes];
+ rdx = (rdx * tx)/(255.0);
+ rdy = (rdy * tx)/(255.0);
+ } /* if do_magmap */
+
+ dvalx = rdx + (2<<14); /* take zero point to be 2^15, since this is two bytes */
+ dvaly = rdy + (2<<14);
+
+ if (dvalx < 0)
+ dvalx = 0;
+
+ if (dvalx > 65535)
+ dvalx = 65535;
+
+ *dx++ = (guchar) (dvalx >> 8); /* store high order byte in value channel */
+ *dx++ = (guchar) (dvalx % 256); /* store low order byte in alpha channel */
+ dx += dest_bytes_inc; /* move data pointer on to next destination pixel */
+
+ if (dvaly < 0)
+ dvaly = 0;
+
+ if (dvaly > 65535)
+ dvaly = 65535;
+
+ *dy++ = (guchar) (dvaly >> 8);
+ *dy++ = (guchar) (dvaly % 256);
+ dy += dest_bytes_inc;
+
+ } /* ------------------------------- for (col...) ---------------- */
+
+ /* store the dest */
+ gegl_buffer_set (destx_buffer,
+ GEGL_RECTANGLE (x1, row, (x2 - x1), 1), 0,
+ destx_format, destx,
+ GEGL_AUTO_ROWSTRIDE);
+
+ gegl_buffer_set (desty_buffer,
+ GEGL_RECTANGLE (x1, row, (x2 - x1), 1), 0,
+ desty_format, desty,
+ GEGL_AUTO_ROWSTRIDE);
+
+ /* swap around the pointers to row buffers */
+ tmp = pr;
+ pr = cr;
+ cr = nr;
+ nr = tmp;
+
+ if (do_gradmap)
+ {
+ tmp = prg;
+ prg = crg;
+ crg = nrg;
+ nrg = tmp;
+ }
+
+ if ((row % 8) == 0)
+ gimp_progress_update ((gdouble) row / (gdouble) (y2 - y1));
+
+ } /* for (row..) */
+
+ gimp_progress_update (1.0);
+
+ g_object_unref (src_buffer);
+ g_object_unref (destx_buffer);
+ g_object_unref (desty_buffer);
+
+ gimp_drawable_update (draw_xd_id, x1, y1, (x2 - x1), (y2 - y1));
+ gimp_drawable_update (draw_yd_id, x1, y1, (x2 - x1), (y2 - y1));
+
+ gimp_displays_flush (); /* make sure layer is visible */
+
+ gimp_progress_init (_("Smoothing X gradient"));
+ blur16 (draw_xd_id);
+
+ gimp_progress_init (_("Smoothing Y gradient"));
+ blur16 (draw_yd_id);
+
+ g_free (prev_row); /* row buffers allocated at top of fn. */
+ g_free (cur_row);
+ g_free (next_row);
+ g_free (prev_row_g); /* row buffers allocated at top of fn. */
+ g_free (cur_row_g);
+ g_free (next_row_g);
+ g_free (cur_row_v);
+ g_free (cur_row_m);
+
+ g_free (destx);
+ g_free (desty);
+
+ *xl_id = xlayer_id; /* pass back the X and Y layer ID numbers */
+ *yl_id = ylayer_id;
+}
+
+/* -------------------------------------------------------------------------- */
+/* The Warp displacement is done here. */
+/* -------------------------------------------------------------------------- */
+
+static void
+warp (gint32 orig_draw_id)
+{
+ gint32 disp_map_id; /* Displacement map, ie, control array */
+ gint32 mag_draw_id; /* Magnitude multiplier factor map */
+ gint32 map_x_id = -1;
+ gint32 map_y_id = -1;
+ gboolean first_time = TRUE;
+ gint width;
+ gint height;
+ gint x1, y1, x2, y2;
+ gint32 image_ID;
+
+ /* index var. over all "warp" Displacement iterations */
+ gint warp_iter;
+
+ disp_map_id = dvals.warp_map;
+ mag_draw_id = dvals.mag_map;
+
+ /* calculate new X,Y Displacement image maps */
+
+ gimp_progress_init (_("Finding XY gradient"));
+
+ /* Get selection area */
+ if (! gimp_drawable_mask_intersect (orig_draw_id,
+ &x1, &y1, &width, &height))
+ return;
+
+ x2 = x1 + width;
+ y2 = y1 + height;
+
+ width = gimp_drawable_width (orig_draw_id);
+ height = gimp_drawable_height (orig_draw_id);
+
+ /* generate x,y differential images (arrays) */
+ diff (disp_map_id, &map_x_id, &map_y_id);
+
+ for (warp_iter = 0; warp_iter < dvals.iter; warp_iter++)
+ {
+ gimp_progress_init_printf (_("Flow step %d"), warp_iter+1);
+ progress = 0;
+
+ warp_one (orig_draw_id, orig_draw_id,
+ map_x_id, map_y_id, mag_draw_id,
+ first_time, warp_iter);
+
+ gimp_drawable_update (orig_draw_id,
+ x1, y1, (x2 - x1), (y2 - y1));
+
+ if (run_mode != GIMP_RUN_NONINTERACTIVE)
+ gimp_displays_flush ();
+
+ first_time = FALSE;
+ }
+
+ image_ID = gimp_item_get_image (map_x_id);
+
+ gimp_image_delete (image_ID);
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void
+warp_one (gint32 draw_id,
+ gint32 new_id,
+ gint32 map_x_id,
+ gint32 map_y_id,
+ gint32 mag_draw_id,
+ gboolean first_time,
+ gint step)
+{
+ GeglBuffer *src_buffer;
+ GeglBuffer *dest_buffer;
+ GeglBuffer *map_x_buffer;
+ GeglBuffer *map_y_buffer;
+ GeglBuffer *mag_buffer = NULL;
+
+ GeglBufferIterator *iter;
+
+ gint width;
+ gint height;
+
+ const Babl *src_format;
+ gint src_bytes;
+ const Babl *dest_format;
+ gint dest_bytes;
+
+ guchar pixel[4][4];
+ gint x1, y1, x2, y2;
+ gint x, y;
+ gint max_progress;
+
+ gdouble needx, needy;
+ gdouble xval=0; /* initialize to quiet compiler grumbles */
+ gdouble yval=0; /* interpolated vector displacement */
+ gdouble scalefac; /* multiplier for vector displacement scaling */
+ gdouble dscalefac; /* multiplier for incremental displacement vectors */
+ gint xi, yi;
+ gint substep; /* loop variable counting displacement vector substeps */
+
+ guchar values[4];
+ guint32 ivalues[4];
+ guchar val;
+
+ gint k;
+
+ gdouble dx, dy; /* X and Y Displacement, integer from GRAY map */
+
+ const Babl *map_x_format;
+ gint map_x_bytes;
+ const Babl *map_y_format;
+ gint map_y_bytes;
+ const Babl *mag_format;
+ gint mag_bytes = 1;
+ gboolean mag_alpha = FALSE;
+
+ GRand *gr;
+
+ gr = g_rand_new (); /* Seed Pseudo Random Number Generator */
+
+ /* ================ Outer Loop calculation ================================ */
+
+ /* Get selection area */
+
+ if (! gimp_drawable_mask_intersect (draw_id,
+ &x1, &y1, &width, &height))
+ return;
+
+ x2 = x1 + width;
+ y2 = y1 + height;
+
+ width = gimp_drawable_width (draw_id);
+ height = gimp_drawable_height (draw_id);
+
+
+ max_progress = (x2 - x1) * (y2 - y1);
+
+
+ /* --------- Register the (many) pixel regions ---------- */
+
+ src_buffer = gimp_drawable_get_buffer (draw_id);
+
+ src_format = get_u8_format (draw_id);
+ src_bytes = babl_format_get_bytes_per_pixel (src_format);
+
+ iter = gegl_buffer_iterator_new (src_buffer,
+ GEGL_RECTANGLE (x1, y1, (x2 - x1), (y2 - y1)),
+ 0, src_format,
+ GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 5);
+
+
+ dest_buffer = gimp_drawable_get_shadow_buffer (new_id);
+
+ dest_format = get_u8_format (new_id);
+ dest_bytes = babl_format_get_bytes_per_pixel (dest_format);
+
+ gegl_buffer_iterator_add (iter, dest_buffer,
+ GEGL_RECTANGLE (x1, y1, (x2 - x1), (y2 - y1)),
+ 0, dest_format,
+ GEGL_ACCESS_WRITE, GEGL_ABYSS_NONE);
+
+
+ map_x_buffer = gimp_drawable_get_buffer (map_x_id);
+
+ map_x_format = get_u8_format (map_x_id);
+ map_x_bytes = babl_format_get_bytes_per_pixel (map_x_format);
+
+ gegl_buffer_iterator_add (iter, map_x_buffer,
+ GEGL_RECTANGLE (x1, y1, (x2 - x1), (y2 - y1)),
+ 0, map_x_format,
+ GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
+
+
+ map_y_buffer = gimp_drawable_get_buffer (map_y_id);
+
+ map_y_format = get_u8_format (map_y_id);
+ map_y_bytes = babl_format_get_bytes_per_pixel (map_y_format);
+
+ gegl_buffer_iterator_add (iter, map_y_buffer,
+ GEGL_RECTANGLE (x1, y1, (x2 - x1), (y2 - y1)),
+ 0, map_y_format,
+ GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
+
+
+ if (dvals.mag_use)
+ {
+ mag_buffer = gimp_drawable_get_buffer (mag_draw_id);
+
+ mag_format = get_u8_format (mag_draw_id);
+ mag_bytes = babl_format_get_bytes_per_pixel (mag_format);
+
+ mag_alpha = gimp_drawable_has_alpha (mag_draw_id);
+
+ gegl_buffer_iterator_add (iter, mag_buffer,
+ GEGL_RECTANGLE (x1, y1, (x2 - x1), (y2 - y1)),
+ 0, mag_format,
+ GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
+ }
+
+ /* substep displacement vector scale factor */
+ dscalefac = dvals.amount / (256 * 127.5 * dvals.substeps);
+
+ while (gegl_buffer_iterator_next (iter))
+ {
+ GeglRectangle roi = iter->items[1].roi;
+ guchar *srcrow = iter->items[0].data;
+ guchar *destrow = iter->items[1].data;
+ guchar *mxrow = iter->items[2].data;
+ guchar *myrow = iter->items[3].data;
+ guchar *mmagrow = NULL;
+
+ if (dvals.mag_use)
+ mmagrow = iter->items[4].data;
+
+ /* loop over destination pixels */
+ for (y = roi.y; y < (roi.y + roi.height); y++)
+ {
+ guchar *dest = destrow;
+ guchar *mx = mxrow;
+ guchar *my = myrow;
+ guchar *mmag = NULL;
+
+ if (dvals.mag_use == TRUE)
+ mmag = mmagrow;
+
+ for (x = roi.x; x < (roi.x + roi.width); x++)
+ {
+ /* ----- Find displacement vector (amnt_x, amnt_y) ------------ */
+
+ dx = dscalefac * ((256.0 * mx[0]) + mx[1] -32768); /* 16-bit values */
+ dy = dscalefac * ((256.0 * my[0]) + my[1] -32768);
+
+ if (dvals.mag_use)
+ {
+ scalefac = warp_map_mag_give_value (mmag,
+ mag_alpha,
+ mag_bytes) / 255.0;
+ dx *= scalefac;
+ dy *= scalefac;
+ }
+
+ if (dvals.dither != 0.0)
+ { /* random dither is +/- dvals.dither pixels */
+ dx += g_rand_double_range (gr, -dvals.dither, dvals.dither);
+ dy += g_rand_double_range (gr, -dvals.dither, dvals.dither);
+ }
+
+ if (dvals.substeps != 1)
+ { /* trace (substeps) iterations of displacement vector */
+ for (substep = 1; substep < dvals.substeps; substep++)
+ {
+ /* In this (substep) loop, (x,y) remain fixed. (dx,dy) vary each step. */
+ needx = x + dx;
+ needy = y + dy;
+
+ if (needx >= 0.0)
+ xi = (gint) needx;
+ else
+ xi = -((gint) -needx + 1);
+
+ if (needy >= 0.0)
+ yi = (gint) needy;
+ else
+ yi = -((gint) -needy + 1);
+
+ /* get 4 neighboring DX values from DiffX drawable for linear interpolation */
+ warp_pixel (map_x_buffer, map_x_format,
+ width, height,
+ x1, y1, x2, y2,
+ xi, yi,
+ pixel[0]);
+ warp_pixel (map_x_buffer, map_x_format,
+ width, height,
+ x1, y1, x2, y2,
+ xi + 1, yi,
+ pixel[1]);
+ warp_pixel (map_x_buffer, map_x_format,
+ width, height,
+ x1, y1, x2, y2,
+ xi, yi + 1,
+ pixel[2]);
+ warp_pixel (map_x_buffer, map_x_format,
+ width, height,
+ x1, y1, x2, y2,
+ xi + 1, yi + 1,
+ pixel[3]);
+
+ ivalues[0] = 256 * pixel[0][0] + pixel[0][1];
+ ivalues[1] = 256 * pixel[1][0] + pixel[1][1];
+ ivalues[2] = 256 * pixel[2][0] + pixel[2][1];
+ ivalues[3] = 256 * pixel[3][0] + pixel[3][1];
+
+ xval = gimp_bilinear_32 (needx, needy, ivalues);
+
+ /* get 4 neighboring DY values from DiffY drawable for linear interpolation */
+ warp_pixel (map_y_buffer, map_y_format,
+ width, height,
+ x1, y1, x2, y2,
+ xi, yi,
+ pixel[0]);
+ warp_pixel (map_y_buffer, map_y_format,
+ width, height,
+ x1, y1, x2, y2,
+ xi + 1, yi,
+ pixel[1]);
+ warp_pixel (map_y_buffer, map_y_format,
+ width, height,
+ x1, y1, x2, y2,
+ xi, yi + 1,
+ pixel[2]);
+ warp_pixel (map_y_buffer, map_y_format,
+ width, height,
+ x1, y1, x2, y2,
+ xi + 1, yi + 1,
+ pixel[3]);
+
+ ivalues[0] = 256 * pixel[0][0] + pixel[0][1];
+ ivalues[1] = 256 * pixel[1][0] + pixel[1][1];
+ ivalues[2] = 256 * pixel[2][0] + pixel[2][1];
+ ivalues[3] = 256 * pixel[3][0] + pixel[3][1];
+
+ yval = gimp_bilinear_32 (needx, needy, ivalues);
+
+ /* move displacement vector to this new value */
+ dx += dscalefac * (xval - 32768);
+ dy += dscalefac * (yval - 32768);
+
+ } /* for (substep) */
+ } /* if (substeps != 0) */
+
+ /* --------------------------------------------------------- */
+
+ needx = x + dx;
+ needy = y + dy;
+
+ mx += map_x_bytes; /* pointers into x,y displacement maps */
+ my += map_y_bytes;
+
+ if (dvals.mag_use == TRUE)
+ mmag += mag_bytes;
+
+ /* Calculations complete; now copy the proper pixel */
+
+ if (needx >= 0.0)
+ xi = (gint) needx;
+ else
+ xi = -((gint) -needx + 1);
+
+ if (needy >= 0.0)
+ yi = (gint) needy;
+ else
+ yi = -((gint) -needy + 1);
+
+ /* get 4 neighboring pixel values from source drawable
+ * for linear interpolation
+ */
+ warp_pixel (src_buffer, src_format,
+ width, height,
+ x1, y1, x2, y2,
+ xi, yi,
+ pixel[0]);
+ warp_pixel (src_buffer, src_format,
+ width, height,
+ x1, y1, x2, y2,
+ xi + 1, yi,
+ pixel[1]);
+ warp_pixel (src_buffer, src_format,
+ width, height,
+ x1, y1, x2, y2,
+ xi, yi + 1,
+ pixel[2]);
+ warp_pixel (src_buffer, src_format,
+ width, height,
+ x1, y1, x2, y2,
+ xi + 1, yi + 1,
+ pixel[3]);
+
+ for (k = 0; k < dest_bytes; k++)
+ {
+ values[0] = pixel[0][k];
+ values[1] = pixel[1][k];
+ values[2] = pixel[2][k];
+ values[3] = pixel[3][k];
+
+ val = gimp_bilinear_8 (needx, needy, values);
+
+ *dest++ = val;
+ }
+ }
+
+ /* srcrow += src_rgn.rowstride; */
+ srcrow += src_bytes * roi.width;
+ destrow += dest_bytes * roi.width;
+ mxrow += map_x_bytes * roi.width;
+ myrow += map_y_bytes * roi.width;
+
+ if (dvals.mag_use == TRUE)
+ mmagrow += mag_bytes * roi.width;
+ }
+
+ progress += (roi.width * roi.height);
+ gimp_progress_update ((double) progress / (double) max_progress);
+ }
+
+ g_object_unref (src_buffer);
+ g_object_unref (dest_buffer);
+ g_object_unref (map_x_buffer);
+ g_object_unref (map_y_buffer);
+
+ if (dvals.mag_use == TRUE)
+ g_object_unref (mag_buffer);
+
+ gimp_progress_update (1.0);
+
+ gimp_drawable_merge_shadow (draw_id, first_time);
+
+ g_rand_free (gr);
+}
+
+/* ------------------------------------------------------------------------- */
+
+static gdouble
+warp_map_mag_give_value (guchar *pt,
+ gint alpha,
+ gint bytes)
+{
+ gdouble ret, val_alpha;
+
+ if (bytes >= 3)
+ ret = (pt[0] + pt[1] + pt[2])/3.0;
+ else
+ ret = (gdouble) *pt;
+
+ if (alpha)
+ {
+ val_alpha = pt[bytes - 1];
+ ret = (ret * val_alpha / 255.0);
+ };
+
+ return (ret);
+}
+
+
+static void
+warp_pixel (GeglBuffer *buffer,
+ const Babl *format,
+ gint width,
+ gint height,
+ gint x1,
+ gint y1,
+ gint x2,
+ gint y2,
+ gint x,
+ gint y,
+ guchar *pixel)
+{
+ static guchar empty_pixel[4] = { 0, 0, 0, 0 };
+ guchar *data;
+
+ /* Tile the image. */
+ if (dvals.wrap_type == WRAP)
+ {
+ if (x < 0)
+ x = width - (-x % width);
+ else
+ x %= width;
+
+ if (y < 0)
+ y = height - (-y % height);
+ else
+ y %= height;
+ }
+ /* Smear out the edges of the image by repeating pixels. */
+ else if (dvals.wrap_type == SMEAR)
+ {
+ if (x < 0)
+ x = 0;
+ else if (x > width - 1)
+ x = width - 1;
+
+ if (y < 0)
+ y = 0;
+ else if (y > height - 1)
+ y = height - 1;
+ }
+
+ if (x >= x1 && y >= y1 && x < x2 && y < y2)
+ {
+ gegl_buffer_sample (buffer, x, y, NULL, pixel, format,
+ GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
+ }
+ else
+ {
+ gint bpp = babl_format_get_bytes_per_pixel (format);
+ gint b;
+
+ if (dvals.wrap_type == BLACK)
+ data = empty_pixel;
+ else
+ data = color_pixel; /* must have selected COLOR type */
+
+ for (b = 0; b < bpp; b++)
+ pixel[b] = data[b];
+ }
+}
+
+/* Warp interface functions */
+
+static gboolean
+warp_map_constrain (gint32 image_id,
+ gint32 drawable_id,
+ gpointer data)
+{
+ gint32 d_id = GPOINTER_TO_INT (data);
+
+ return (gimp_drawable_width (drawable_id) == gimp_drawable_width (d_id) &&
+ gimp_drawable_height (drawable_id) == gimp_drawable_height (d_id));
+}