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PIKApp/plug-ins/common/curve-bend.c

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/* curve_bend plugin for PIKA */
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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/>.
*/
/* Revision history
* (2004/02/08) v1.3.18 hof: #133244 exit with execution error if there is
* an empty selection
* (2003/08/24) v1.3.18 hof: #119937 show busy cursor when recalculating
* preview
* (2002/09/xx) v1.1.18 mitch and gsr: clean interface
* (2000/02/16) v1.1.17b hof: added spinbuttons for rotate entry
* (2000/02/16) v1.1.17 hof: undo bugfix (#6012)
* don't call pika_undo_push_group_end
* after pika_displays_flush
* (1999/09/13) v1.01 hof: PDB-calls updated for pika 1.1.9
* (1999/05/10) v1.0 hof: first public release
* (1999/04/23) v0.0 hof: coding started,
* splines and dialog parts are similar to curves.c
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <glib/gstdio.h>
#include <libpika/pika.h>
#include <libpika/pikaui.h>
#include "libpika/stdplugins-intl.h"
/* Defines */
#define PLUG_IN_PROC "plug-in-curve-bend"
#define PLUG_IN_BINARY "curve-bend"
#define PLUG_IN_ROLE "pika-curve-bend"
#define PLUG_IN_VERSION "v1.3.18 (2003/08/26)"
#define PLUG_IN_IMAGE_TYPES "RGB*, GRAY*"
#define PLUG_IN_AUTHOR "Wolfgang Hofer (hof@hotbot.com)"
#define PLUG_IN_COPYRIGHT "Wolfgang Hofer"
#define PLUG_IN_ITER_NAME "plug-in-curve-bend-Iterator"
#define PLUG_IN_DATA_ITER_FROM "plug_in_curve_bend_ITER_FROM"
#define PLUG_IN_DATA_ITER_TO "plug_in_curve_bend_ITER_TO"
#define KEY_POINTFILE "POINTFILE_CURVE_BEND"
#define KEY_POINTS "POINTS"
#define KEY_VAL_Y "VAL_Y"
#define MIDDLE 127
#define MIX_CHANNEL(a, b, m) (((a * m) + (b * (255 - m))) / 255)
#define UP_GRAPH 0x1
#define UP_PREVIEW_EXPOSE 0x4
#define UP_PREVIEW 0x8
#define UP_DRAW 0x10
#define UP_ALL 0xFF
#define GRAPH_WIDTH 256
#define GRAPH_HEIGHT 256
#define PREVIEW_SIZE_X 256
#define PREVIEW_SIZE_Y 256
#define PV_IMG_WIDTH 128
#define PV_IMG_HEIGHT 128
#define RADIUS 3
#define MIN_DISTANCE 8
#define PREVIEW_BPP 4
#define SMOOTH 0
#define GFREE 1
#define GRAPH_MASK GDK_EXPOSURE_MASK | \
GDK_POINTER_MOTION_MASK | \
GDK_POINTER_MOTION_HINT_MASK | \
GDK_ENTER_NOTIFY_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON_RELEASE_MASK | \
GDK_BUTTON1_MOTION_MASK
#define OUTLINE_UPPER 0
#define OUTLINE_LOWER 1
typedef struct _BenderValues BenderValues;
struct _BenderValues
{
guchar curve[2][256]; /* for curve_type freehand mode 0 <= curve <= 255 */
gdouble points[2][17][2]; /* for curve_type smooth mode 0.0 <= points <= 1.0 */
gint curve_type;
gint smoothing;
gint antialias;
gint work_on_copy;
gdouble rotation;
gint32 total_steps;
gdouble current_step;
};
typedef struct _Curves Curves;
struct _Curves
{
int x, y; /* coords for last mouse click */
};
typedef struct _BenderDialog BenderDialog;
struct _BenderDialog
{
GtkWidget *shell;
GtkWidget *outline_menu;
GtkWidget *pv_widget;
GtkWidget *graph;
GtkAdjustment *rotate_data;
GtkWidget *filechooser;
GdkCursor *cursor_busy;
PikaDrawable *drawable;
int color;
int outline;
gint preview;
int grab_point;
int last;
int leftmost;
int rightmost;
int curve_type;
gdouble points[2][17][2]; /* 0.0 <= points <= 1.0 */
guchar curve[2][256]; /* 0 <= curve <= 255 */
gint32 *curve_ptr[2]; /* 0 <= curve_ptr <= src_drawable_width
* both arrays are allocated dynamic,
* depending on drawable width
*/
gint32 min2[2];
gint32 max2[2];
gint32 zero2[2];
gboolean show_progress;
gboolean smoothing;
gboolean antialias;
gboolean work_on_copy;
gdouble rotation;
PikaImage *preview_image;
PikaLayer *preview_layer1;
PikaLayer *preview_layer2;
BenderValues *bval_from;
BenderValues *bval_to;
BenderValues *bval_curr;
gboolean run;
};
/* points Coords:
*
* 1.0 +----+----+----+----+
* | . | | |
* +--.-+--.-+----+----+
* . | . | |
* 0.5 +----+----+-.--+----+
* | | | . .
* +----+----+----+-.-.+
* | | | | |
* 0.0 +----+----+----+----+
* 0.0 0.5 1.0
*
* curve Coords:
*
* OUTLINE_UPPER OUTLINE_LOWER
*
* 255 +----+----+----+----+ 255 +----+----+----+----+
* | . | | | --- max | . | | | --- max
* +--.-+--.-+----+----+ +--.-+--.-+----+----+
* . | . | | zero ___ . | . | |
* +----+----+-.--+----+ +----+----+-.--+----+
* | | | . . --- zero | | | . .
* +----+----+----+-.-.+ ___ min +----+----+----+-.-.+ ___ min
* | | | | | | | | | |
* 0 +----+----+----+----+ 0 +----+----+----+----+
* 0 255 0 255
*/
typedef double CRMatrix[4][4];
typedef struct
{
PikaDrawable *drawable;
gint width;
gint height;
GeglBuffer *buffer;
const Babl *format;
gint x1;
gint y1;
gint x2;
gint y2;
gint index_alpha; /* 0 == no alpha, 1 == GREYA, 3 == RGBA */
gint bpp;
gint tile_width;
gint tile_height;
} t_GDRW;
typedef struct
{
gint32 y;
guchar color[4];
} t_Last;
typedef struct _Bender Bender;
typedef struct _BenderClass BenderClass;
struct _Bender
{
PikaPlugIn parent_instance;
};
struct _BenderClass
{
PikaPlugInClass parent_class;
};
#define BENDER_TYPE (bender_get_type ())
#define BENDER (obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), BENDER_TYPE, Bender))
GType bender_get_type (void) G_GNUC_CONST;
static GList * bender_query_procedures (PikaPlugIn *plug_in);
static PikaProcedure * bender_create_procedure (PikaPlugIn *plug_in,
const gchar *name);
static PikaValueArray * bender_run (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
const PikaValueArray *args,
gpointer run_data);
static BenderDialog * bender_new_dialog (PikaDrawable *drawable);
static void bender_update (BenderDialog *,
int);
static void bender_plot_curve (BenderDialog *,
int,
int,
int,
int,
gint32,
gint32,
gint);
static void bender_calculate_curve (BenderDialog *,
gint32,
gint32,
gint);
static void bender_rotate_adj_callback (GtkAdjustment *,
gpointer);
static void bender_border_callback (GtkWidget *,
gpointer);
static void bender_type_callback (GtkWidget *,
gpointer);
static void bender_reset_callback (GtkWidget *,
gpointer);
static void bender_copy_callback (GtkWidget *,
gpointer);
static void bender_copy_inv_callback (GtkWidget *,
gpointer);
static void bender_swap_callback (GtkWidget *,
gpointer);
static void bender_response (GtkWidget *,
gint,
BenderDialog *);
static void bender_smoothing_callback (GtkWidget *,
gpointer);
static void bender_antialias_callback (GtkWidget *,
gpointer);
static void bender_work_on_copy_callback (GtkWidget *,
gpointer);
static void bender_preview_update (GtkWidget *,
gpointer);
static void bender_preview_update_once (GtkWidget *,
gpointer);
static void bender_load_callback (GtkWidget *,
BenderDialog *);
static void bender_save_callback (GtkWidget *,
BenderDialog *);
static gint bender_graph_events (GtkWidget *,
GdkEvent *,
BenderDialog *);
static gint bender_graph_draw (GtkWidget *,
cairo_t *,
BenderDialog *);
static void bender_CR_compose (CRMatrix,
CRMatrix,
CRMatrix);
static void bender_init_min_max (BenderDialog *,
gint32);
static BenderDialog * do_dialog (PikaDrawable *drawable);
static void p_init_gdrw (t_GDRW *gdrw,
PikaDrawable *drawable,
int shadow);
static void p_end_gdrw (t_GDRW *gdrw);
static PikaLayer * p_main_bend (BenderDialog *cd,
PikaDrawable *,
gint);
static PikaImage * p_create_pv_image (PikaDrawable *src_drawable,
PikaLayer **layer);
static void p_render_preview (BenderDialog *cd,
PikaLayer *layer);
static void p_get_pixel (t_GDRW *gdrw,
gint32 x,
gint32 y,
guchar *pixel);
static void p_put_pixel (t_GDRW *gdrw,
gint32 x,
gint32 y,
guchar *pixel);
static void p_put_mix_pixel (t_GDRW *gdrw,
gint32 x,
gint32 y,
guchar *color,
gint32 nb_curvy,
gint32 nb2_curvy,
gint32 curvy);
static void p_stretch_curves (BenderDialog *cd,
gint32 xmax,
gint32 ymax);
static void p_cd_to_bval (BenderDialog *cd,
BenderValues *bval);
static void p_cd_from_bval (BenderDialog *cd,
BenderValues *bval);
static void p_store_values (BenderDialog *cd);
static void p_retrieve_values (BenderDialog *cd);
static void p_bender_calculate_iter_curve (BenderDialog *cd,
gint32 xmax,
gint32 ymax);
static void p_delta_gint32 (gint32 *val,
gint32 val_from,
gint32 val_to,
gint32 total_steps,
gdouble current_step);
static void p_copy_points (BenderDialog *cd,
int outline,
int xy,
int argc,
const gdouble *floatarray);
static void p_copy_yval (BenderDialog *cd,
int outline,
GBytes *bytes);
static int p_save_pointfile (BenderDialog *cd,
const gchar *filename);
G_DEFINE_TYPE (Bender, bender, PIKA_TYPE_PLUG_IN)
PIKA_MAIN (BENDER_TYPE)
DEFINE_STD_SET_I18N
static CRMatrix CR_basis =
{
{ -0.5, 1.5, -1.5, 0.5 },
{ 1.0, -2.5, 2.0, -0.5 },
{ -0.5, 0.0, 0.5, 0.0 },
{ 0.0, 1.0, 0.0, 0.0 },
};
static int gb_debug = FALSE;
static void
bender_class_init (BenderClass *klass)
{
PikaPlugInClass *plug_in_class = PIKA_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = bender_query_procedures;
plug_in_class->create_procedure = bender_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
bender_init (Bender *bender)
{
}
static GList *
bender_query_procedures (PikaPlugIn *plug_in)
{
return g_list_append (NULL, g_strdup (PLUG_IN_PROC));
}
static PikaProcedure *
bender_create_procedure (PikaPlugIn *plug_in,
const gchar *name)
{
PikaProcedure *procedure = NULL;
if (! strcmp (name, PLUG_IN_PROC))
{
procedure = pika_image_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
bender_run, NULL, NULL);
pika_procedure_set_image_types (procedure, PLUG_IN_IMAGE_TYPES);
pika_procedure_set_sensitivity_mask (procedure,
PIKA_PROCEDURE_SENSITIVE_DRAWABLE);
pika_procedure_set_menu_label (procedure, _("_Curve Bend..."));
pika_procedure_add_menu_path (procedure, "<Image>/Filters/Distorts");
pika_procedure_set_documentation
(procedure,
_("Bend the image using two control curves"),
"This plug-in does bend the active layer "
"If there is a current selection it is copied to "
"floating selection and the curve_bend distortion "
"is done on the floating selection. If "
"work_on_copy parameter is TRUE, the curve_bend "
"distortion is done on a copy of the active layer "
"(or floating selection). The upper and lower edges "
"are bent in shape of 2 spline curves. both (upper "
"and lower) curves are determined by upto 17 points "
"or by 256 Y-Values if curve_type == 1 (freehand "
"mode) If rotation is not 0, the layer is rotated "
"before and rotated back after the bend operation. "
"This enables bending in other directions than "
"vertical. bending usually changes the size of "
"the handled layer. this plug-in sets the offsets "
"of the handled layer to keep its center at the "
"same position",
name);
pika_procedure_set_attribution (procedure,
PLUG_IN_AUTHOR,
PLUG_IN_COPYRIGHT,
PLUG_IN_VERSION);
PIKA_PROC_ARG_DOUBLE (procedure, "rotation",
"Rotation",
"Direction {angle 0 to 360 degree } "
"of the bend effect",
0, 360, 0,
G_PARAM_READWRITE);
PIKA_PROC_ARG_BOOLEAN (procedure, "smoothing",
"Smoothing",
"Smoothing",
TRUE,
G_PARAM_READWRITE);
PIKA_PROC_ARG_BOOLEAN (procedure, "antialias",
"Antialias",
"Antialias",
TRUE,
G_PARAM_READWRITE);
PIKA_PROC_ARG_BOOLEAN (procedure, "work-on-copy",
"Work on copy",
"Copy the drawable and bend the copy",
FALSE,
G_PARAM_READWRITE);
PIKA_PROC_ARG_INT (procedure, "curve-type",
"Curve type",
"{ 0 == smooth (use 17 points), "
"1 == freehand (use 256 val_y) }",
0, 1, 0,
G_PARAM_READWRITE);
PIKA_PROC_ARG_INT (procedure, "argc-upper-point-x",
"Argc upper point X",
"Argc upper point X",
2, 17, 2,
G_PARAM_READWRITE);
PIKA_PROC_ARG_FLOAT_ARRAY (procedure, "upper-point-x",
"Upper point X",
"Array of 17 x point coords "
"{ 0.0 <= x <= 1.0 or -1 for unused point }",
G_PARAM_READWRITE);
PIKA_PROC_ARG_INT (procedure, "argc-upper-point-y",
"Argc upper point Y",
"Argc upper point Y",
2, 17, 2,
G_PARAM_READWRITE);
PIKA_PROC_ARG_FLOAT_ARRAY (procedure, "upper-point-y",
"Upper point Y",
"Array of 17 y point coords "
"{ 0.0 <= y <= 1.0 or -1 for unused point }",
G_PARAM_READWRITE);
PIKA_PROC_ARG_INT (procedure, "argc-lower-point-x",
"Argc lower point X",
"Argc lower point X",
2, 17, 2,
G_PARAM_READWRITE);
PIKA_PROC_ARG_FLOAT_ARRAY (procedure, "lower-point-x",
"Lower point X",
"Array of 17 x point coords "
"{ 0.0 <= x <= 1.0 or -1 for unused point }",
G_PARAM_READWRITE);
PIKA_PROC_ARG_INT (procedure, "argc-lower-point-y",
"Argc lower point Y",
"Argc lower point Y",
2, 17, 2,
G_PARAM_READWRITE);
PIKA_PROC_ARG_FLOAT_ARRAY (procedure, "lower-point-y",
"Lower point Y",
"Array of 17 y point coords "
"{ 0.0 <= y <= 1.0 or -1 for unused point }",
G_PARAM_READWRITE);
PIKA_PROC_ARG_BYTES (procedure, "upper-val-y",
"Upper val Y",
"Array of 256 y freehand coords "
"{ 0 <= y <= 255 }",
G_PARAM_READWRITE);
PIKA_PROC_ARG_BYTES (procedure, "lower-val-y",
"Lower val Y",
"Array of 256 y freehand coords "
"{ 0 <= y <= 255 }",
G_PARAM_READWRITE);
PIKA_PROC_VAL_LAYER (procedure, "bent-layer",
"Bent layer",
"The transformed layer",
FALSE,
G_PARAM_READWRITE);
}
return procedure;
}
/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX PDB_STUFF XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
static PikaItem *
p_pika_rotate (PikaImage *image,
PikaDrawable *drawable,
gint32 interpolation,
gdouble angle_deg)
{
gdouble angle_rad;
PikaItem *rc;
angle_rad = (angle_deg * G_PI) / 180.0;
pika_context_push ();
if (! interpolation)
pika_context_set_interpolation (PIKA_INTERPOLATION_NONE);
pika_context_set_transform_resize (PIKA_TRANSFORM_RESIZE_ADJUST);
rc = pika_item_transform_rotate (PIKA_ITEM (drawable),
angle_rad,
TRUE /*auto_center*/,
-1.0 /*center_x*/,
-1.0 /*center_y*/);
pika_context_pop ();
if (! rc)
g_printerr ("Error: pika_drawable_transform_rotate_default call failed\n");
return rc;
}
/* ============================================================================
* p_if_selection_float_it
* ============================================================================
*/
static PikaLayer *
p_if_selection_float_it (PikaImage *image,
PikaLayer *layer)
{
if (! pika_layer_is_floating_sel (layer))
{
PikaSelection *sel_channel;
gint32 x1, x2, y1, y2;
gint32 non_empty;
/* check and see if we have a selection mask */
sel_channel = pika_image_get_selection (image);
pika_selection_bounds (image, &non_empty, &x1, &y1, &x2, &y2);
if (non_empty && sel_channel)
{
/* selection is TRUE, make a layer (floating selection) from
the selection */
if (pika_edit_copy (1, (const PikaItem **) &layer))
{
PikaLayer **layers;
gint num_layers;
layers = pika_edit_paste (PIKA_DRAWABLE (layer), FALSE, &num_layers);
/* Since we explicitly copied a single layer, there should
* be no more than a single layer in the paste as well.
*/
layer = num_layers ? layers[0] : NULL;
g_free (layers);
}
else
{
return NULL;
}
}
}
return layer;
}
/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX END_PDB_STUFF XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
static PikaValueArray *
bender_run (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
const PikaValueArray *args,
gpointer run_data)
{
const gchar *env;
PikaValueArray *return_vals;
BenderDialog *cd = NULL;
PikaDrawable *active_drawable = NULL;
PikaDrawable *drawable;
PikaLayer *layer = NULL;
PikaLayer *bent_layer = NULL;
GError *error = NULL;
gegl_init (NULL, NULL);
if (n_drawables != 1)
{
GError *error = NULL;
g_set_error (&error, PIKA_PLUG_IN_ERROR, 0,
_("Procedure '%s' only works with one drawable."),
PLUG_IN_PROC);
return pika_procedure_new_return_values (procedure,
PIKA_PDB_EXECUTION_ERROR,
error);
}
else
{
drawable = drawables[0];
}
env = g_getenv ("BEND_DEBUG");
if (env != NULL)
if ((*env != 'n') && (*env != 'N')) gb_debug = 1;
if (! PIKA_IS_LAYER (drawable))
{
g_set_error (&error, 0, 0, "%s",
_("Can operate on layers only "
"(but was called on channel or mask)."));
return pika_procedure_new_return_values (procedure,
PIKA_PDB_EXECUTION_ERROR,
error);
}
layer = PIKA_LAYER (drawable);
/* check for layermask */
if (pika_layer_get_mask (layer))
{
g_set_error (&error, 0, 0, "%s",
_("Cannot operate on layers with masks."));
return pika_procedure_new_return_values (procedure,
PIKA_PDB_EXECUTION_ERROR,
error);
}
/* if there is a selection, make it the floating selection layer */
active_drawable = PIKA_DRAWABLE (p_if_selection_float_it (image, layer));
if (! active_drawable)
{
/* could not float the selection because selection rectangle
* is completely empty return PIKA_PDB_EXECUTION_ERROR
*/
g_set_error (&error, 0, 0, "%s",
_("Cannot operate on empty selections."));
return pika_procedure_new_return_values (procedure,
PIKA_PDB_EXECUTION_ERROR,
error);
}
switch (run_mode)
{
case PIKA_RUN_INTERACTIVE:
/* pika_get_data (PLUG_IN_PROC, &g_bndvals); */
/* Get information from the dialog */
cd = do_dialog (active_drawable);
cd->show_progress = TRUE;
break;
case PIKA_RUN_NONINTERACTIVE:
cd = g_new (BenderDialog, 1);
cd->run = TRUE;
cd->show_progress = TRUE;
cd->drawable = active_drawable;
cd->rotation = PIKA_VALUES_GET_DOUBLE (args, 0);
cd->smoothing = PIKA_VALUES_GET_BOOLEAN (args, 1);
cd->antialias = PIKA_VALUES_GET_BOOLEAN (args, 2);
cd->work_on_copy = PIKA_VALUES_GET_BOOLEAN (args, 3);
cd->curve_type = PIKA_VALUES_GET_INT (args, 4);
p_copy_points (cd, OUTLINE_UPPER, 0,
PIKA_VALUES_GET_INT (args, 5),
PIKA_VALUES_GET_FLOAT_ARRAY (args, 6));
p_copy_points (cd, OUTLINE_UPPER, 1,
PIKA_VALUES_GET_INT (args, 7),
PIKA_VALUES_GET_FLOAT_ARRAY (args, 8));
p_copy_points (cd, OUTLINE_LOWER, 0,
PIKA_VALUES_GET_INT (args, 9),
PIKA_VALUES_GET_FLOAT_ARRAY (args, 10));
p_copy_points (cd, OUTLINE_LOWER, 1,
PIKA_VALUES_GET_INT (args, 11),
PIKA_VALUES_GET_FLOAT_ARRAY (args, 12));
p_copy_yval (cd, OUTLINE_UPPER,
PIKA_VALUES_GET_BYTES (args, 13));
p_copy_yval (cd, OUTLINE_LOWER,
PIKA_VALUES_GET_BYTES (args, 14));
break;
case PIKA_RUN_WITH_LAST_VALS:
cd = g_new (BenderDialog, 1);
cd->run = TRUE;
cd->show_progress = TRUE;
cd->drawable = active_drawable;
p_retrieve_values (cd); /* Possibly retrieve data from a previous run */
break;
}
if (! cd)
{
return pika_procedure_new_return_values (procedure,
PIKA_PDB_EXECUTION_ERROR,
error);
}
if (cd->run)
{
pika_image_undo_group_start (image);
bent_layer = p_main_bend (cd, cd->drawable,
cd->work_on_copy);
pika_image_undo_group_end (image);
/* Store variable states for next run */
if (run_mode == PIKA_RUN_INTERACTIVE)
p_store_values (cd);
}
else
{
return pika_procedure_new_return_values (procedure,
PIKA_PDB_CANCEL,
NULL);
}
if (run_mode != PIKA_RUN_NONINTERACTIVE)
pika_displays_flush ();
return_vals = pika_procedure_new_return_values (procedure,
PIKA_PDB_SUCCESS,
NULL);
PIKA_VALUES_SET_LAYER (return_vals, 1, bent_layer);
return return_vals;
}
static int
p_save_pointfile (BenderDialog *cd,
const gchar *filename)
{
FILE *fp;
gint j;
fp = g_fopen(filename, "w+b");
if (! fp)
{
g_message (_("Could not open '%s' for writing: %s"),
pika_filename_to_utf8 (filename), g_strerror (errno));
return -1;
}
fprintf (fp, "%s\n", KEY_POINTFILE);
fprintf (fp, "VERSION 1.0\n\n");
fprintf (fp, "# points for upper and lower smooth curve (0.0 <= pt <= 1.0)\n");
fprintf (fp, "# there are upto 17 points where unused points are set to -1\n");
fprintf (fp, "# UPPERX UPPERY LOWERX LOWERY\n");
fprintf (fp, "\n");
for(j = 0; j < 17; j++)
{
fprintf (fp, "%s %+.6f %+.6f %+.6f %+.6f\n", KEY_POINTS,
(float)cd->points[OUTLINE_UPPER][j][0],
(float)cd->points[OUTLINE_UPPER][j][1],
(float)cd->points[OUTLINE_LOWER][j][0],
(float)cd->points[OUTLINE_LOWER][j][1] );
}
fprintf (fp, "\n");
fprintf (fp, "# y values for upper/lower freehand curve (0 <= y <= 255) \n");
fprintf (fp, "# there must be exactly 256 y values \n");
fprintf (fp, "# UPPER_Y LOWER_Y\n");
fprintf (fp, "\n");
for (j = 0; j < 256; j++)
{
fprintf (fp, "%s %3d %3d\n", KEY_VAL_Y,
(int)cd->curve[OUTLINE_UPPER][j],
(int)cd->curve[OUTLINE_LOWER][j]);
}
fclose (fp);
return 0;
}
static int
p_load_pointfile (BenderDialog *cd,
const gchar *filename)
{
gint pi, ci, n, len;
FILE *fp;
char buff[2000];
float fux, fuy, flx, fly;
gint iuy, ily ;
fp = g_fopen(filename, "rb");
if (! fp)
{
g_message (_("Could not open '%s' for reading: %s"),
pika_filename_to_utf8 (filename), g_strerror (errno));
return -1;
}
pi = 0;
ci = 0;
if (! fgets (buff, 2000 - 1, fp))
{
g_message (_("Error while reading '%s': %s"),
pika_filename_to_utf8 (filename), g_strerror (errno));
fclose (fp);
return -1;
}
if (strncmp (buff, KEY_POINTFILE, strlen(KEY_POINTFILE)) == 0)
{
while (NULL != fgets (buff, 2000-1, fp))
{
len = strlen(KEY_POINTS);
if (strncmp (buff, KEY_POINTS, len) == 0)
{
n = sscanf (&buff[len],
"%f %f %f %f", &fux, &fuy, &flx, &fly);
if ((n == 4) && (pi < 17))
{
cd->points[OUTLINE_UPPER][pi][0] = fux;
cd->points[OUTLINE_UPPER][pi][1] = fuy;
cd->points[OUTLINE_LOWER][pi][0] = flx;
cd->points[OUTLINE_LOWER][pi][1] = fly;
pi++;
}
else
{
g_printf("warning: BAD points[%d] in file %s are ignored\n", pi, filename);
}
}
len = strlen (KEY_VAL_Y);
if (strncmp (buff, KEY_VAL_Y, len) == 0)
{
n = sscanf (&buff[len], "%d %d", &iuy, &ily);
if ((n == 2) && (ci < 256))
{
cd->curve[OUTLINE_UPPER][ci] = iuy;
cd->curve[OUTLINE_LOWER][ci] = ily;
ci++;
}
else
{
g_printf("warning: BAD y_vals[%d] in file %s are ignored\n", ci, filename);
}
}
}
}
fclose (fp);
return 0;
}
static void
p_cd_to_bval (BenderDialog *cd,
BenderValues *bval)
{
gint i, j;
for (i = 0; i < 2; i++)
{
for (j = 0; j < 256; j++)
{
bval->curve[i][j] = cd->curve[i][j];
}
for (j = 0; j < 17; j++)
{
bval->points[i][j][0] = cd->points[i][j][0]; /* x */
bval->points[i][j][1] = cd->points[i][j][1]; /* y */
}
}
bval->curve_type = cd->curve_type;
bval->smoothing = cd->smoothing;
bval->antialias = cd->antialias;
bval->work_on_copy = cd->work_on_copy;
bval->rotation = cd->rotation;
bval->total_steps = 0;
bval->current_step = 0.0;
}
static void
p_cd_from_bval (BenderDialog *cd,
BenderValues *bval)
{
gint i, j;
for (i = 0; i < 2; i++)
{
for (j = 0; j < 256; j++)
{
cd->curve[i][j] = bval->curve[i][j];
}
for (j = 0; j < 17; j++)
{
cd->points[i][j][0] = bval->points[i][j][0]; /* x */
cd->points[i][j][1] = bval->points[i][j][1]; /* y */
}
}
cd->curve_type = bval->curve_type;
cd->smoothing = bval->smoothing;
cd->antialias = bval->antialias;
cd->work_on_copy = bval->work_on_copy;
cd->rotation = bval->rotation;
}
static void
p_store_values (BenderDialog *cd)
{
BenderValues bval;
p_cd_to_bval (cd, &bval);
pika_set_data (PLUG_IN_PROC, &bval, sizeof (bval));
}
static void
p_retrieve_values (BenderDialog *cd)
{
BenderValues bval;
bval.total_steps = 0;
bval.current_step = -444.4; /* init with an invalid dummy value */
pika_get_data (PLUG_IN_PROC, &bval);
if (bval.total_steps == 0)
{
cd->bval_from = NULL;
cd->bval_to = NULL;
if(bval.current_step != -444.4)
{
/* last_value data was retrieved (and dummy value was overwritten) */
p_cd_from_bval(cd, &bval);
}
}
else
{
cd->bval_from = g_new (BenderValues, 1);
cd->bval_to = g_new (BenderValues, 1);
cd->bval_curr = g_new (BenderValues, 1);
*cd->bval_curr = bval;
/* it seems that we are called from GAP with "Varying Values" */
pika_get_data(PLUG_IN_DATA_ITER_FROM, cd->bval_from);
pika_get_data(PLUG_IN_DATA_ITER_TO, cd->bval_to);
*cd->bval_curr = bval;
p_cd_from_bval(cd, cd->bval_curr);
cd->work_on_copy = FALSE;
}
}
static void
p_delta_gint32 (gint32 *val,
gint32 val_from,
gint32 val_to,
gint32 total_steps,
gdouble current_step)
{
double delta;
if (total_steps < 1)
return;
delta = ((double)(val_to - val_from) / (double)total_steps) * ((double)total_steps - current_step);
*val = val_from + delta;
}
static void
p_copy_points (BenderDialog *cd,
int outline,
int xy,
int argc,
const gdouble *floatarray)
{
int j;
for (j = 0; j < 17; j++)
{
cd->points[outline][j][xy] = -1;
}
for (j = 0; j < argc; j++)
{
cd->points[outline][j][xy] = floatarray[j];
}
}
static void
p_copy_yval (BenderDialog *cd,
int outline,
GBytes *bytes)
{
const guint8 *array = g_bytes_get_data (bytes, NULL);
guchar fill = MIDDLE;
for (int j = 0; j < 256; j++)
{
if (j < g_bytes_get_size (bytes))
{
fill = cd->curve[outline][j] = array[j];
}
else
{
cd->curve[outline][j] = fill;
}
}
}
/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
/* curves machinery */
/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
static BenderDialog *
do_dialog (PikaDrawable *drawable)
{
BenderDialog *cd;
/* Init GTK */
pika_ui_init (PLUG_IN_BINARY);
/* The curve_bend dialog */
cd = bender_new_dialog (drawable);
/* create temporary image (with a small copy of drawable) for the preview */
cd->preview_image = p_create_pv_image (drawable,
&cd->preview_layer1);
cd->preview_layer2 = NULL;
if (! gtk_widget_get_visible (cd->shell))
gtk_widget_show (cd->shell);
bender_update (cd, UP_GRAPH | UP_DRAW | UP_PREVIEW_EXPOSE);
gtk_main ();
pika_image_delete (cd->preview_image);
cd->preview_image = NULL;
cd->preview_layer1 = NULL;
cd->preview_layer2 = NULL;
return cd;
}
/**************************/
/* Select Curves dialog */
/**************************/
static BenderDialog *
bender_new_dialog (PikaDrawable *drawable)
{
BenderDialog *cd;
GtkWidget *main_hbox;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *vbox2;
GtkWidget *frame;
GtkWidget *upper, *lower;
GtkWidget *smooth, *freew;
GtkWidget *toggle;
GtkWidget *button;
GtkWidget *spinbutton;
GtkWidget *label;
GdkDisplay *display;
gint i, j;
cd = g_new (BenderDialog, 1);
cd->preview = FALSE;
cd->curve_type = SMOOTH;
cd->filechooser = NULL;
cd->outline = OUTLINE_UPPER;
cd->show_progress = FALSE;
cd->smoothing = TRUE;
cd->antialias = TRUE;
cd->work_on_copy = FALSE;
cd->rotation = 0.0; /* vertical bend */
cd->drawable = drawable;
cd->color = pika_drawable_is_rgb (drawable);
cd->run = FALSE;
cd->bval_from = NULL;
cd->bval_to = NULL;
cd->bval_curr = NULL;
for (i = 0; i < 2; i++)
for (j = 0; j < 256; j++)
cd->curve[i][j] = MIDDLE;
cd->grab_point = -1;
for (i = 0; i < 2; i++)
{
for (j = 0; j < 17; j++)
{
cd->points[i][j][0] = -1;
cd->points[i][j][1] = -1;
}
cd->points[i][0][0] = 0.0; /* x */
cd->points[i][0][1] = 0.5; /* y */
cd->points[i][16][0] = 1.0; /* x */
cd->points[i][16][1] = 0.5; /* y */
}
p_retrieve_values(cd); /* Possibly retrieve data from a previous run */
/* The shell and main vbox */
cd->shell = pika_dialog_new (_("Curve Bend"), PLUG_IN_ROLE,
NULL, 0,
pika_standard_help_func, PLUG_IN_PROC,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_OK"), GTK_RESPONSE_OK,
NULL);
pika_dialog_set_alternative_button_order (GTK_DIALOG (cd->shell),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
pika_window_set_transient (GTK_WINDOW (cd->shell));
g_signal_connect (cd->shell, "response",
G_CALLBACK (bender_response),
cd);
/* busy cursor */
display = gtk_widget_get_display (cd->shell);
cd->cursor_busy = gdk_cursor_new_for_display (display, GDK_WATCH);
/* The main hbox */
main_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_hbox), 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (cd->shell))),
main_hbox, TRUE, TRUE, 0);
gtk_widget_show (main_hbox);
/* Left side column */
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_box_pack_start (GTK_BOX (main_hbox), vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
/* Preview area, top of column */
frame = pika_frame_new (_("Preview"));
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
vbox2 = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
gtk_container_add (GTK_CONTAINER (frame), vbox2);
gtk_widget_show (vbox2);
/* The range drawing area */
frame = gtk_frame_new (NULL);
gtk_widget_set_halign (frame, GTK_ALIGN_CENTER);
gtk_widget_set_valign (frame, GTK_ALIGN_CENTER);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox2), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
cd->pv_widget = pika_preview_area_new ();
gtk_widget_set_size_request (cd->pv_widget,
PREVIEW_SIZE_X, PREVIEW_SIZE_Y);
gtk_container_add (GTK_CONTAINER (frame), cd->pv_widget);
gtk_widget_show (cd->pv_widget);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_end (GTK_BOX (vbox2), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* The preview button */
button = gtk_button_new_with_mnemonic (_("_Preview Once"));
gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (bender_preview_update_once),
cd);
/* The preview toggle */
toggle = gtk_check_button_new_with_mnemonic (_("Automatic pre_view"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), cd->preview);
gtk_box_pack_start (GTK_BOX (hbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (bender_preview_update),
cd);
/* Options area, bottom of column */
frame = pika_frame_new (_("Options"));
gtk_box_pack_end (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
/* Render Options */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* Rotate spinbutton */
label = gtk_label_new_with_mnemonic (_("Rotat_e:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
cd->rotate_data = gtk_adjustment_new (0, 0.0, 360.0, 1, 45, 0);
gtk_adjustment_set_value (cd->rotate_data, cd->rotation);
spinbutton = pika_spin_button_new (cd->rotate_data, 0.5, 1);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), spinbutton);
g_signal_connect (cd->rotate_data, "value-changed",
G_CALLBACK (bender_rotate_adj_callback),
cd);
/* The smoothing toggle */
toggle = gtk_check_button_new_with_mnemonic (_("Smoo_thing"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), cd->smoothing);
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (bender_smoothing_callback),
cd);
/* The antialiasing toggle */
toggle = gtk_check_button_new_with_mnemonic (_("_Antialiasing"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), cd->antialias);
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (bender_antialias_callback),
cd);
/* The work_on_copy toggle */
toggle = gtk_check_button_new_with_mnemonic (_("Work on cop_y"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), cd->work_on_copy);
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (bender_work_on_copy_callback),
cd);
/* The curves graph */
frame = pika_frame_new (_("Modify Curves"));
gtk_box_pack_start (GTK_BOX (main_hbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
cd->graph = gtk_drawing_area_new ();
gtk_widget_set_halign (cd->graph, GTK_ALIGN_CENTER);
gtk_widget_set_valign (cd->graph, GTK_ALIGN_CENTER);
gtk_widget_set_size_request (cd->graph,
GRAPH_WIDTH + RADIUS * 2,
GRAPH_HEIGHT + RADIUS * 2);
gtk_widget_set_events (cd->graph, GRAPH_MASK);
gtk_box_pack_start (GTK_BOX (vbox), cd->graph, FALSE, FALSE, 0);
gtk_widget_show (cd->graph);
g_signal_connect (cd->graph, "event",
G_CALLBACK (bender_graph_events),
cd);
g_signal_connect (cd->graph, "draw",
G_CALLBACK (bender_graph_draw),
cd);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
frame = pika_int_radio_group_new (TRUE, _("Curve for Border"),
G_CALLBACK (bender_border_callback),
&cd->outline, NULL, cd->outline,
C_("curve-border", "_Upper"), OUTLINE_UPPER, &upper,
C_("curve-border", "_Lower"), OUTLINE_LOWER, &lower,
NULL);
g_object_set_data (G_OBJECT (upper), "cd", cd);
g_object_set_data (G_OBJECT (lower), "cd", cd);
gtk_box_pack_start (GTK_BOX (hbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
frame = pika_int_radio_group_new (TRUE, _("Curve Type"),
G_CALLBACK (bender_type_callback),
&cd->curve_type, NULL, cd->curve_type,
_("Smoot_h"), SMOOTH, &smooth,
_("_Free"), GFREE, &freew,
NULL);
g_object_set_data (G_OBJECT (smooth), "cd", cd);
g_object_set_data (G_OBJECT (freew), "cd", cd);
gtk_box_pack_start (GTK_BOX (hbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
/* hbox for curve options */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* The Copy button */
button = gtk_button_new_with_mnemonic (_("_Copy"));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
pika_help_set_help_data (button,
_("Copy the active curve to the other border"), NULL);
g_signal_connect (button, "clicked",
G_CALLBACK (bender_copy_callback),
cd);
/* The CopyInv button */
button = gtk_button_new_with_mnemonic (_("_Mirror"));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
pika_help_set_help_data (button,
_("Mirror the active curve to the other border"),
NULL);
g_signal_connect (button, "clicked",
G_CALLBACK (bender_copy_inv_callback),
cd);
/* The Swap button */
button = gtk_button_new_with_mnemonic (_("S_wap"));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
pika_help_set_help_data (button,
_("Swap the two curves"), NULL);
g_signal_connect (button, "clicked",
G_CALLBACK (bender_swap_callback),
cd);
/* The Reset button */
button = gtk_button_new_with_mnemonic (_("_Reset"));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
pika_help_set_help_data (button,
_("Reset the active curve"), NULL);
g_signal_connect (button, "clicked",
G_CALLBACK (bender_reset_callback),
cd);
/* hbox for curve load and save */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 4);
gtk_box_pack_end (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* The Load button */
button = gtk_button_new_with_mnemonic (_("_Open"));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
pika_help_set_help_data (button,
_("Load the curves from a file"), NULL);
g_signal_connect (button, "clicked",
G_CALLBACK (bender_load_callback),
cd);
/* The Save button */
button = gtk_button_new_with_mnemonic (_("_Save"));
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
pika_help_set_help_data (button,
_("Save the curves to a file"), NULL);
g_signal_connect (button, "clicked",
G_CALLBACK (bender_save_callback),
cd);
gtk_widget_show (main_hbox);
return cd;
}
static void
bender_update (BenderDialog *cd,
int update)
{
if (update & UP_PREVIEW)
{
gdk_window_set_cursor (gtk_widget_get_window (GTK_WIDGET (cd->shell)),
cd->cursor_busy);
gdk_display_flush (gtk_widget_get_display (cd->shell));
if (cd->preview_layer2)
pika_image_remove_layer (cd->preview_image, cd->preview_layer2);
cd->preview_layer2 = p_main_bend (cd, PIKA_DRAWABLE (cd->preview_layer1),
TRUE /* work_on_copy*/ );
p_render_preview (cd, cd->preview_layer2);
if (update & UP_DRAW)
gtk_widget_queue_draw (cd->pv_widget);
gdk_window_set_cursor (gtk_widget_get_window (GTK_WIDGET (cd->shell)),
NULL);
}
if (update & UP_PREVIEW_EXPOSE)
{
/* on expose just redraw cd->preview_layer2
* that holds the bent version of the preview (if there is one)
*/
if (! cd->preview_layer2)
cd->preview_layer2 = p_main_bend (cd, PIKA_DRAWABLE (cd->preview_layer1),
TRUE /* work_on_copy*/ );
p_render_preview (cd, cd->preview_layer2);
if (update & UP_DRAW)
gtk_widget_queue_draw (cd->pv_widget);
}
if ((update & UP_GRAPH) && (update & UP_DRAW))
gtk_widget_queue_draw (cd->graph);
}
static void
bender_plot_curve (BenderDialog *cd,
int p1,
int p2,
int p3,
int p4,
gint32 xmax,
gint32 ymax,
gint fix255)
{
CRMatrix geometry;
CRMatrix tmp1, tmp2;
CRMatrix deltas;
double x, dx, dx2, dx3;
double y, dy, dy2, dy3;
double d, d2, d3;
int lastx, lasty;
gint32 newx, newy;
gint32 ntimes;
gint32 i;
/* construct the geometry matrix from the segment */
for (i = 0; i < 4; i++)
{
geometry[i][2] = 0;
geometry[i][3] = 0;
}
geometry[0][0] = (cd->points[cd->outline][p1][0] * xmax);
geometry[1][0] = (cd->points[cd->outline][p2][0] * xmax);
geometry[2][0] = (cd->points[cd->outline][p3][0] * xmax);
geometry[3][0] = (cd->points[cd->outline][p4][0] * xmax);
geometry[0][1] = (cd->points[cd->outline][p1][1] * ymax);
geometry[1][1] = (cd->points[cd->outline][p2][1] * ymax);
geometry[2][1] = (cd->points[cd->outline][p3][1] * ymax);
geometry[3][1] = (cd->points[cd->outline][p4][1] * ymax);
/* subdivide the curve ntimes (1000) times */
ntimes = 4 * xmax;
/* ntimes can be adjusted to give a finer or coarser curve */
d = 1.0 / ntimes;
d2 = d * d;
d3 = d * d * d;
/* construct a temporary matrix for determining the forward differencing deltas */
tmp2[0][0] = 0; tmp2[0][1] = 0; tmp2[0][2] = 0; tmp2[0][3] = 1;
tmp2[1][0] = d3; tmp2[1][1] = d2; tmp2[1][2] = d; tmp2[1][3] = 0;
tmp2[2][0] = 6*d3; tmp2[2][1] = 2*d2; tmp2[2][2] = 0; tmp2[2][3] = 0;
tmp2[3][0] = 6*d3; tmp2[3][1] = 0; tmp2[3][2] = 0; tmp2[3][3] = 0;
/* compose the basis and geometry matrices */
bender_CR_compose (CR_basis, geometry, tmp1);
/* compose the above results to get the deltas matrix */
bender_CR_compose (tmp2, tmp1, deltas);
/* extract the x deltas */
x = deltas[0][0];
dx = deltas[1][0];
dx2 = deltas[2][0];
dx3 = deltas[3][0];
/* extract the y deltas */
y = deltas[0][1];
dy = deltas[1][1];
dy2 = deltas[2][1];
dy3 = deltas[3][1];
lastx = CLAMP (x, 0, xmax);
lasty = CLAMP (y, 0, ymax);
if (fix255)
{
cd->curve[cd->outline][lastx] = lasty;
}
else
{
cd->curve_ptr[cd->outline][lastx] = lasty;
if(gb_debug) g_printf("bender_plot_curve xmax:%d ymax:%d\n",
(int)xmax, (int)ymax);
}
/* loop over the curve */
for (i = 0; i < ntimes; i++)
{
/* increment the x values */
x += dx;
dx += dx2;
dx2 += dx3;
/* increment the y values */
y += dy;
dy += dy2;
dy2 += dy3;
newx = CLAMP ((ROUND (x)), 0, xmax);
newy = CLAMP ((ROUND (y)), 0, ymax);
/* if this point is different than the last one...then draw it */
if ((lastx != newx) || (lasty != newy))
{
if (fix255)
{
/* use fixed array size (for the curve graph) */
cd->curve[cd->outline][newx] = newy;
}
else
{
/* use dynamic allocated curve_ptr (for the real curve) */
cd->curve_ptr[cd->outline][newx] = newy;
if(gb_debug) g_printf("outline: %d cX: %d cY: %d\n",
(int)cd->outline, (int)newx, (int)newy);
}
}
lastx = newx;
lasty = newy;
}
}
static void
bender_calculate_curve (BenderDialog *cd,
gint32 xmax,
gint32 ymax,
gint fix255)
{
int i;
int points[17];
int num_pts;
int p1, p2, p3, p4;
int xmid;
int yfirst, ylast;
switch (cd->curve_type)
{
case GFREE:
break;
case SMOOTH:
/* cycle through the curves */
num_pts = 0;
for (i = 0; i < 17; i++)
if (cd->points[cd->outline][i][0] != -1)
points[num_pts++] = i;
xmid = xmax / 2;
/* Initialize boundary curve points */
if (num_pts != 0)
{
if (fix255)
{
for (i = 0; i < (cd->points[cd->outline][points[0]][0] * 255); i++)
cd->curve[cd->outline][i] =
(cd->points[cd->outline][points[0]][1] * 255);
for (i = (cd->points[cd->outline][points[num_pts - 1]][0] * 255); i < 256; i++)
cd->curve[cd->outline][i] =
(cd->points[cd->outline][points[num_pts - 1]][1] * 255);
}
else
{
yfirst = cd->points[cd->outline][points[0]][1] * ymax;
ylast = cd->points[cd->outline][points[num_pts - 1]][1] * ymax;
for (i = 0; i < xmid; i++)
{
cd->curve_ptr[cd->outline][i] = yfirst;
}
for (i = xmid; i <= xmax; i++)
{
cd->curve_ptr[cd->outline][i] = ylast;
}
}
}
for (i = 0; i < num_pts - 1; i++)
{
p1 = (i == 0) ? points[i] : points[(i - 1)];
p2 = points[i];
p3 = points[(i + 1)];
p4 = (i == (num_pts - 2)) ? points[(num_pts - 1)] : points[(i + 2)];
bender_plot_curve (cd, p1, p2, p3, p4, xmax, ymax, fix255);
}
break;
}
}
static void
bender_rotate_adj_callback (GtkAdjustment *adjustment,
gpointer client_data)
{
BenderDialog *cd = client_data;
if (gtk_adjustment_get_value (adjustment) != cd->rotation)
{
cd->rotation = gtk_adjustment_get_value (adjustment);
if (cd->preview)
bender_update (cd, UP_PREVIEW | UP_DRAW);
}
}
static void
bender_border_callback (GtkWidget *widget,
gpointer data)
{
BenderDialog *cd;
pika_radio_button_update (widget, data);
cd = g_object_get_data (G_OBJECT (widget), "cd");
bender_update (cd, UP_GRAPH | UP_DRAW);
}
static void
bender_type_callback (GtkWidget *widget,
gpointer data)
{
BenderDialog *cd;
pika_radio_button_update (widget, data);
cd = g_object_get_data (G_OBJECT (widget), "cd");
if (! cd)
return;
if (cd->curve_type == SMOOTH)
{
gint i;
/* pick representative points from the curve and make them control points */
for (i = 0; i <= 8; i++)
{
gint index = CLAMP ((i * 32), 0, 255);
cd->points[cd->outline][i * 2][0] = (gdouble)index / 255.0;
cd->points[cd->outline][i * 2][1] = (gdouble)cd->curve[cd->outline][index] / 255.0;
}
bender_calculate_curve (cd, 255, 255, TRUE);
bender_update (cd, UP_GRAPH | UP_DRAW);
if (cd->preview)
bender_update (cd, UP_PREVIEW | UP_DRAW);
}
else
{
bender_update (cd, UP_GRAPH | UP_DRAW);
}
}
static void
bender_reset_callback (GtkWidget *widget,
gpointer client_data)
{
BenderDialog *cd = (BenderDialog *) client_data;
gint i;
/* Initialize the values */
for (i = 0; i < 256; i++)
cd->curve[cd->outline][i] = MIDDLE;
cd->grab_point = -1;
for (i = 0; i < 17; i++)
{
cd->points[cd->outline][i][0] = -1;
cd->points[cd->outline][i][1] = -1;
}
cd->points[cd->outline][0][0] = 0.0; /* x */
cd->points[cd->outline][0][1] = 0.5; /* y */
cd->points[cd->outline][16][0] = 1.0; /* x */
cd->points[cd->outline][16][1] = 0.5; /* y */
bender_update (cd, UP_GRAPH | UP_DRAW);
if (cd->preview)
bender_update (cd, UP_PREVIEW | UP_DRAW);
}
static void
bender_copy_callback (GtkWidget *widget,
gpointer client_data)
{
BenderDialog *cd = (BenderDialog *) client_data;
int i;
int other;
other = (cd->outline) ? 0 : 1;
for (i = 0; i < 17; i++)
{
cd->points[other][i][0] = cd->points[cd->outline][i][0];
cd->points[other][i][1] = cd->points[cd->outline][i][1];
}
for (i= 0; i < 256; i++)
{
cd->curve[other][i] = cd->curve[cd->outline][i];
}
bender_update (cd, UP_GRAPH | UP_DRAW);
if (cd->preview)
bender_update (cd, UP_PREVIEW | UP_DRAW);
}
static void
bender_copy_inv_callback (GtkWidget *widget,
gpointer client_data)
{
BenderDialog *cd = (BenderDialog*) client_data;
int i;
int other;
other = (cd->outline) ? 0 : 1;
for (i = 0; i < 17; i++)
{
cd->points[other][i][0] = cd->points[cd->outline][i][0]; /* x */
cd->points[other][i][1] = 1.0 - cd->points[cd->outline][i][1]; /* y */
}
for (i= 0; i < 256; i++)
{
cd->curve[other][i] = 255 - cd->curve[cd->outline][i];
}
bender_update (cd, UP_GRAPH | UP_DRAW);
if (cd->preview)
bender_update (cd, UP_PREVIEW | UP_DRAW);
}
static void
bender_swap_callback (GtkWidget *widget,
gpointer client_data)
{
#define SWAP_VALUE(a, b, h) { h=a; a=b; b=h; }
BenderDialog *cd = (BenderDialog*) client_data;
int i;
int other;
gdouble hd;
guchar hu;
other = (cd->outline) ? 0 : 1;
for (i = 0; i < 17; i++)
{
SWAP_VALUE(cd->points[other][i][0], cd->points[cd->outline][i][0], hd); /* x */
SWAP_VALUE(cd->points[other][i][1], cd->points[cd->outline][i][1], hd); /* y */
}
for (i= 0; i < 256; i++)
{
SWAP_VALUE(cd->curve[other][i], cd->curve[cd->outline][i], hu);
}
bender_update (cd, UP_GRAPH | UP_DRAW);
if (cd->preview)
bender_update (cd, UP_PREVIEW | UP_DRAW);
}
static void
bender_response (GtkWidget *widget,
gint response_id,
BenderDialog *cd)
{
if (response_id == GTK_RESPONSE_OK)
cd->run = TRUE;
gtk_widget_destroy (GTK_WIDGET (cd->shell));
gtk_main_quit ();
}
static void
bender_preview_update (GtkWidget *widget,
gpointer data)
{
BenderDialog *cd = (BenderDialog*) data;
cd->preview = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget));
if(cd->preview)
bender_update (cd, UP_PREVIEW | UP_DRAW);
}
static void
bender_preview_update_once (GtkWidget *widget,
gpointer data)
{
BenderDialog *cd = (BenderDialog*) data;
bender_update (cd, UP_PREVIEW | UP_DRAW);
}
static void
p_points_save_to_file_response (GtkWidget *dialog,
gint response_id,
BenderDialog *cd)
{
if (response_id == GTK_RESPONSE_OK)
{
gchar *filename;
filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
p_save_pointfile (cd, filename);
g_free (filename);
}
gtk_widget_destroy (dialog);
}
static void
p_points_load_from_file_response (GtkWidget *dialog,
gint response_id,
BenderDialog *cd)
{
if (response_id == GTK_RESPONSE_OK)
{
gchar *filename;
filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
p_load_pointfile (cd, filename);
bender_update (cd, UP_ALL);
g_free (filename);
}
gtk_widget_destroy (dialog);
}
static void
bender_load_callback (GtkWidget *w,
BenderDialog *cd)
{
if (! cd->filechooser)
{
cd->filechooser =
gtk_file_chooser_dialog_new (_("Load Curve Points from File"),
GTK_WINDOW (gtk_widget_get_toplevel (w)),
GTK_FILE_CHOOSER_ACTION_OPEN,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_Open"), GTK_RESPONSE_OK,
NULL);
pika_dialog_set_alternative_button_order (GTK_DIALOG (cd->filechooser),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gtk_dialog_set_default_response (GTK_DIALOG (cd->filechooser),
GTK_RESPONSE_OK);
g_signal_connect (cd->filechooser, "response",
G_CALLBACK (p_points_load_from_file_response),
cd);
g_signal_connect (cd->filechooser, "destroy",
G_CALLBACK (gtk_widget_destroyed),
&cd->filechooser);
}
gtk_window_present (GTK_WINDOW (cd->filechooser));
}
static void
bender_save_callback (GtkWidget *w,
BenderDialog *cd)
{
if (! cd->filechooser)
{
cd->filechooser =
gtk_file_chooser_dialog_new (_("Save Curve Points to File"),
GTK_WINDOW (gtk_widget_get_toplevel (w)),
GTK_FILE_CHOOSER_ACTION_SAVE,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_Save"), GTK_RESPONSE_OK,
NULL);
g_signal_connect (cd->filechooser, "response",
G_CALLBACK (p_points_save_to_file_response),
cd);
g_signal_connect (cd->filechooser, "destroy",
G_CALLBACK (gtk_widget_destroyed),
&cd->filechooser);
gtk_file_chooser_set_current_name (GTK_FILE_CHOOSER (cd->filechooser),
"curve_bend.points");
}
gtk_window_present (GTK_WINDOW (cd->filechooser));
}
static void
bender_smoothing_callback (GtkWidget *w,
gpointer data)
{
BenderDialog *cd = (BenderDialog*) data;
cd->smoothing = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (w));
if(cd->preview)
bender_update (cd, UP_PREVIEW | UP_DRAW);
}
static void
bender_antialias_callback (GtkWidget *w,
gpointer data)
{
BenderDialog *cd = (BenderDialog*) data;
cd->antialias = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (w));
if (cd->preview)
bender_update (cd, UP_PREVIEW | UP_DRAW);
}
static void
bender_work_on_copy_callback (GtkWidget *w,
gpointer data)
{
BenderDialog *cd = (BenderDialog*) data;
cd->work_on_copy = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (w));
}
static gboolean
bender_graph_events (GtkWidget *widget,
GdkEvent *event,
BenderDialog *cd)
{
static GdkCursorType cursor_type = GDK_TOP_LEFT_ARROW;
GdkCursorType new_type;
GdkEventMotion *mevent;
int i;
int tx, ty;
int x, y;
int closest_point;
int distance;
int x1, x2, y1, y2;
new_type = GDK_X_CURSOR;
closest_point = 0;
if (! gdk_event_get_device (event))
return FALSE;
/* get the pointer position */
gdk_window_get_device_position (gtk_widget_get_window (cd->graph),
gdk_event_get_device (event),
&tx, &ty, NULL);
x = CLAMP ((tx - RADIUS), 0, 255);
y = CLAMP ((ty - RADIUS), 0, 255);
distance = G_MAXINT;
for (i = 0; i < 17; i++)
{
if (cd->points[cd->outline][i][0] != -1)
if (abs ((int) (x - (cd->points[cd->outline][i][0] * 255.0))) < distance)
{
distance = abs ((int) (x - (cd->points[cd->outline][i][0] * 255.0)));
closest_point = i;
}
}
if (distance > MIN_DISTANCE)
closest_point = (x + 8) / 16;
switch (event->type)
{
case GDK_BUTTON_PRESS:
new_type = GDK_TCROSS;
switch (cd->curve_type)
{
case SMOOTH:
/* determine the leftmost and rightmost points */
cd->leftmost = -1;
for (i = closest_point - 1; i >= 0; i--)
if (cd->points[cd->outline][i][0] != -1)
{
cd->leftmost = (cd->points[cd->outline][i][0] * 255.0);
break;
}
cd->rightmost = 256;
for (i = closest_point + 1; i < 17; i++)
if (cd->points[cd->outline][i][0] != -1)
{
cd->rightmost = (cd->points[cd->outline][i][0] * 255.0);
break;
}
cd->grab_point = closest_point;
cd->points[cd->outline][cd->grab_point][0] = (gdouble)x / 255.0;
cd->points[cd->outline][cd->grab_point][1] = (gdouble)(255 - y) / 255.0;
bender_calculate_curve (cd, 255, 255, TRUE);
break;
case GFREE:
cd->curve[cd->outline][x] = 255 - y;
cd->grab_point = x;
cd->last = y;
break;
}
bender_update (cd, UP_GRAPH | UP_DRAW);
break;
case GDK_BUTTON_RELEASE:
new_type = GDK_FLEUR;
cd->grab_point = -1;
if (cd->preview)
bender_update (cd, UP_PREVIEW | UP_DRAW);
break;
case GDK_MOTION_NOTIFY:
mevent = (GdkEventMotion *) event;
if (mevent->is_hint)
{
mevent->x = tx;
mevent->y = ty;
}
switch (cd->curve_type)
{
case SMOOTH:
/* If no point is grabbed... */
if (cd->grab_point == -1)
{
if (cd->points[cd->outline][closest_point][0] != -1)
new_type = GDK_FLEUR;
else
new_type = GDK_TCROSS;
}
/* Else, drag the grabbed point */
else
{
new_type = GDK_TCROSS;
cd->points[cd->outline][cd->grab_point][0] = -1;
if (x > cd->leftmost && x < cd->rightmost)
{
closest_point = (x + 8) / 16;
if (cd->points[cd->outline][closest_point][0] == -1)
cd->grab_point = closest_point;
cd->points[cd->outline][cd->grab_point][0] = (gdouble)x / 255.0;
cd->points[cd->outline][cd->grab_point][1] = (gdouble)(255 - y) / 255.0;
}
bender_calculate_curve (cd, 255, 255, TRUE);
bender_update (cd, UP_GRAPH | UP_DRAW);
}
break;
case GFREE:
if (cd->grab_point != -1)
{
if (cd->grab_point > x)
{
x1 = x;
x2 = cd->grab_point;
y1 = y;
y2 = cd->last;
}
else
{
x1 = cd->grab_point;
x2 = x;
y1 = cd->last;
y2 = y;
}
if (x2 != x1)
for (i = x1; i <= x2; i++)
cd->curve[cd->outline][i] = 255 - (y1 + ((y2 - y1) * (i - x1)) / (x2 - x1));
else
cd->curve[cd->outline][x] = 255 - y;
cd->grab_point = x;
cd->last = y;
bender_update (cd, UP_GRAPH | UP_DRAW);
}
if (mevent->state & GDK_BUTTON1_MASK)
new_type = GDK_TCROSS;
else
new_type = GDK_PENCIL;
break;
}
if (new_type != cursor_type)
{
cursor_type = new_type;
/* change_win_cursor (gtk_widget_get_window (cd->graph), cursor_type); */
}
break;
default:
break;
}
return FALSE;
}
static gboolean
bender_graph_draw (GtkWidget *widget,
cairo_t *cr,
BenderDialog *cd)
{
GdkRGBA black = { 0.0, 0.0, 0.0, 1.0 };
GdkRGBA white = { 1.0, 1.0, 1.0, 1.0 };
GdkRGBA gray = { 0.5, 0.5, 0.5, 1.0 };
gint i;
gint other;
cairo_set_line_width (cr, 1.0);
cairo_translate (cr, 0.5, 0.5);
/* Clear the background */
gdk_cairo_set_source_rgba (cr, &white);
cairo_paint (cr);
/* Draw the grid lines */
for (i = 0; i < 5; i++)
{
cairo_move_to (cr, RADIUS, i * (GRAPH_HEIGHT / 4) + RADIUS);
cairo_line_to (cr, GRAPH_WIDTH + RADIUS, i * (GRAPH_HEIGHT / 4) + RADIUS);
cairo_move_to (cr, i * (GRAPH_WIDTH / 4) + RADIUS, RADIUS);
cairo_line_to (cr, i * (GRAPH_WIDTH / 4) + RADIUS, GRAPH_HEIGHT + RADIUS);
}
gdk_cairo_set_source_rgba (cr, &gray);
cairo_stroke (cr);
/* Draw the other curve */
other = (cd->outline == 0) ? 1 : 0;
cairo_move_to (cr, RADIUS, 255 - cd->curve[other][0] + RADIUS);
for (i = 1; i < 256; i++)
{
cairo_line_to (cr, i + RADIUS, 255 - cd->curve[other][i] + RADIUS);
}
gdk_cairo_set_source_rgba (cr, &gray);
cairo_stroke (cr);
/* Draw the active curve */
cairo_move_to (cr, RADIUS, 255 - cd->curve[cd->outline][0] + RADIUS);
for (i = 1; i < 256; i++)
{
cairo_line_to (cr, i + RADIUS, 255 - cd->curve[cd->outline][i] + RADIUS);
}
/* Draw the points */
if (cd->curve_type == SMOOTH)
{
for (i = 0; i < 17; i++)
{
if (cd->points[cd->outline][i][0] != -1)
{
cairo_new_sub_path (cr);
cairo_arc (cr,
(cd->points[cd->outline][i][0] * 255.0) + RADIUS,
255 - (cd->points[cd->outline][i][1] * 255.0) + RADIUS,
RADIUS,
0, 2 * G_PI);
}
}
}
gdk_cairo_set_source_rgba (cr, &black);
cairo_stroke (cr);
return FALSE;
}
static void
bender_CR_compose (CRMatrix a,
CRMatrix b,
CRMatrix ab)
{
gint i, j;
for (i = 0; i < 4; i++)
{
for (j = 0; j < 4; j++)
{
ab[i][j] = (a[i][0] * b[0][j] +
a[i][1] * b[1][j] +
a[i][2] * b[2][j] +
a[i][3] * b[3][j]);
}
}
}
static void
p_render_preview (BenderDialog *cd,
PikaLayer *layer)
{
guchar pixel[4];
guchar *buf, *ptr;
gint x, y;
gint ofx, ofy;
gint width, height;
t_GDRW l_gdrw;
t_GDRW *gdrw;
width = pika_drawable_get_width (PIKA_DRAWABLE (layer));
height = pika_drawable_get_height (PIKA_DRAWABLE (layer));
ptr = buf = g_new (guchar, PREVIEW_BPP * PREVIEW_SIZE_X * PREVIEW_SIZE_Y);
gdrw = &l_gdrw;
p_init_gdrw (gdrw, PIKA_DRAWABLE (layer), FALSE);
/* offsets to set bend layer to preview center */
ofx = (width / 2) - (PREVIEW_SIZE_X / 2);
ofy = (height / 2) - (PREVIEW_SIZE_Y / 2);
/* render preview */
for (y = 0; y < PREVIEW_SIZE_Y; y++)
{
for (x = 0; x < PREVIEW_SIZE_X; x++)
{
p_get_pixel (gdrw, x + ofx, y + ofy, &pixel[0]);
if (cd->color)
{
ptr[0] = pixel[0];
ptr[1] = pixel[1];
ptr[2] = pixel[2];
}
else
{
ptr[0] = pixel[0];
ptr[1] = pixel[0];
ptr[2] = pixel[0];
}
ptr[3] = pixel[gdrw->index_alpha];
ptr += PREVIEW_BPP;
}
}
pika_preview_area_draw (PIKA_PREVIEW_AREA (cd->pv_widget),
0, 0, PREVIEW_SIZE_X, PREVIEW_SIZE_Y,
PIKA_RGBA_IMAGE,
buf,
PREVIEW_BPP * PREVIEW_SIZE_X);
g_free (buf);
p_end_gdrw(gdrw);
}
/* ===================================================== */
/* curve_bend worker procedures */
/* ===================================================== */
static void
p_stretch_curves (BenderDialog *cd,
gint32 xmax,
gint32 ymax)
{
gint32 x1, x2;
gdouble ya, yb;
gdouble rest;
int outline;
for (outline = 0; outline < 2; outline++)
{
for(x1 = 0; x1 <= xmax; x1++)
{
x2 = (x1 * 255) / xmax;
if ((xmax <= 255) && (x2 < 255))
{
cd->curve_ptr[outline][x1] =
ROUND ((cd->curve[outline][x2] * ymax) / 255);
}
else
{
/* interpolate */
rest = (((gdouble)x1 * 255.0) / (gdouble)xmax) - x2;
ya = cd->curve[outline][x2]; /* y of this point */
yb = cd->curve[outline][x2 +1]; /* y of next point */
cd->curve_ptr[outline][x1] =
ROUND (((ya + ((yb -ya) * rest)) * ymax) / 255);
}
}
}
}
static void
bender_init_min_max (BenderDialog *cd,
gint32 xmax)
{
int i, j;
for (i = 0; i < 2; i++)
{
cd->min2[i] = 65000;
cd->max2[i] = 0;
for (j = 0; j <= xmax; j++)
{
if(cd->curve_ptr[i][j] > cd->max2[i])
{
cd->max2[i] = cd->curve_ptr[i][j];
}
if(cd->curve_ptr[i][j] < cd->min2[i])
{
cd->min2[i] = cd->curve_ptr[i][j];
}
}
}
/* for UPPER outline : y-zero line is assumed at the min leftmost or
* rightmost point
*/
cd->zero2[OUTLINE_UPPER] = MIN (cd->curve_ptr[OUTLINE_UPPER][0],
cd->curve_ptr[OUTLINE_UPPER][xmax]);
/* for LOWER outline : y-zero line is assumed at the min leftmost or
* rightmost point
*/
cd->zero2[OUTLINE_LOWER] = MAX (cd->curve_ptr[OUTLINE_LOWER][0],
cd->curve_ptr[OUTLINE_LOWER][xmax]);
}
static gint32
p_curve_get_dy (BenderDialog *cd,
gint32 x,
gint32 drawable_width,
gint32 total_steps,
gdouble current_step)
{
/* get y values of both upper and lower curve,
* and return the iterated value in between
*/
gdouble y1, y2;
gdouble delta;
y1 = cd->zero2[OUTLINE_UPPER] - cd->curve_ptr[OUTLINE_UPPER][x];
y2 = cd->zero2[OUTLINE_LOWER] - cd->curve_ptr[OUTLINE_LOWER][x];
delta = ((double)(y2 - y1) / (double)(total_steps - 1)) * current_step;
return SIGNED_ROUND (y1 + delta);
}
static gint32
p_upper_curve_extend (BenderDialog *cd,
gint32 drawable_width,
gint32 drawable_height)
{
gint32 y1, y2;
y1 = cd->max2[OUTLINE_UPPER] - cd->zero2[OUTLINE_UPPER];
y2 = (cd->max2[OUTLINE_LOWER] - cd->zero2[OUTLINE_LOWER]) - drawable_height;
return MAX (y1, y2);
}
static gint32
p_lower_curve_extend (BenderDialog *cd,
gint32 drawable_width,
gint32 drawable_height)
{
gint32 y1, y2;
y1 = cd->zero2[OUTLINE_LOWER] - cd->min2[OUTLINE_LOWER];
y2 = (cd->zero2[OUTLINE_UPPER] - cd->min2[OUTLINE_UPPER]) - drawable_height;
return MAX (y1, y2);
}
static void
p_end_gdrw (t_GDRW *gdrw)
{
g_object_unref (gdrw->buffer);
}
static void
p_init_gdrw (t_GDRW *gdrw,
PikaDrawable *drawable,
int shadow)
{
gint w, h;
gdrw->drawable = drawable;
if (shadow)
gdrw->buffer = pika_drawable_get_shadow_buffer (drawable);
else
gdrw->buffer = pika_drawable_get_buffer (drawable);
gdrw->width = pika_drawable_get_width (gdrw->drawable);
gdrw->height = pika_drawable_get_height (gdrw->drawable);
gdrw->tile_width = pika_tile_width ();
gdrw->tile_height = pika_tile_height ();
if (! pika_drawable_mask_intersect (gdrw->drawable,
&gdrw->x1, &gdrw->y1, &w, &h))
{
w = 0;
h = 0;
}
gdrw->x2 = gdrw->x1 + w;
gdrw->y2 = gdrw->y1 + h;
if (pika_drawable_has_alpha (drawable))
gdrw->format = babl_format ("R'G'B'A u8");
else
gdrw->format = babl_format ("R'G'B' u8");
gdrw->bpp = babl_format_get_bytes_per_pixel (gdrw->format);
if (pika_drawable_has_alpha (drawable))
{
/* index of the alpha channelbyte {1|3} */
gdrw->index_alpha = gdrw->bpp - 1;
}
else
{
gdrw->index_alpha = 0; /* there is no alpha channel */
}
}
/* get pixel value
* return light transparent black gray pixel if out of bounds
* (should occur in the previews only)
*/
static void
p_get_pixel (t_GDRW *gdrw,
gint32 x,
gint32 y,
guchar *pixel)
{
pixel[1] = 255;
pixel[3] = 255; /* simulate full visible alpha channel */
gegl_buffer_sample (gdrw->buffer, x, y, NULL, pixel, gdrw->format,
GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
}
static void
p_put_pixel (t_GDRW *gdrw,
gint32 x,
gint32 y,
guchar *pixel)
{
gegl_buffer_set (gdrw->buffer, GEGL_RECTANGLE (x, y, 1, 1), 0,
gdrw->format, pixel, GEGL_AUTO_ROWSTRIDE);
}
static void
p_put_mix_pixel (t_GDRW *gdrw,
gint32 x,
gint32 y,
guchar *color,
gint32 nb_curvy,
gint32 nb2_curvy,
gint32 curvy)
{
guchar pixel[4];
guchar mixmask;
gint idx;
gint diff;
mixmask = 255 - 96;
diff = abs(nb_curvy - curvy);
if (diff == 0)
{
mixmask = 255 - 48;
diff = abs(nb2_curvy - curvy);
if (diff == 0)
{
/* last 2 neighbours were not shifted against current pixel, do not mix */
p_put_pixel(gdrw, x, y, color);
return;
}
}
/* get left neighbour pixel */
p_get_pixel(gdrw, x-1, y, &pixel[0]);
if (pixel[gdrw->index_alpha] < 10)
{
/* neighbour is (nearly or full) transparent, do not mix */
p_put_pixel(gdrw, x, y, color);
return;
}
for (idx = 0; idx < gdrw->index_alpha ; idx++)
{
/* mix in left neighbour color */
pixel[idx] = MIX_CHANNEL(color[idx], pixel[idx], mixmask);
}
pixel[gdrw->index_alpha] = color[gdrw->index_alpha];
p_put_pixel(gdrw, x, y, &pixel[0]);
}
/* ============================================================================
* p_create_pv_image
* ============================================================================
*/
static PikaImage *
p_create_pv_image (PikaDrawable *src_drawable,
PikaLayer **layer)
{
PikaImage *new_image;
guint new_width;
guint new_height;
PikaImageType type;
guint x, y;
double scale;
guchar pixel[4];
t_GDRW src_gdrw;
t_GDRW dst_gdrw;
gint src_width;
gint src_height;
src_width = pika_drawable_get_width (src_drawable);
src_height = pika_drawable_get_height (src_drawable);
new_image = pika_image_new (PREVIEW_SIZE_X, PREVIEW_SIZE_Y,
pika_image_get_base_type (pika_item_get_image (PIKA_ITEM (src_drawable))));
pika_image_undo_disable (new_image);
type = pika_drawable_type (src_drawable);
if (src_height > src_width)
{
new_height = PV_IMG_HEIGHT;
new_width = (src_width * new_height) / src_height;
scale = (float) src_height / PV_IMG_HEIGHT;
}
else
{
new_width = PV_IMG_WIDTH;
new_height = (src_height * new_width) / src_width;
scale = (float) src_width / PV_IMG_WIDTH;
}
*layer = pika_layer_new (new_image, "preview_original",
new_width, new_height,
type,
100.0, /* opacity */
0); /* mode NORMAL */
if (! pika_drawable_has_alpha (PIKA_DRAWABLE (*layer)))
{
/* always add alpha channel */
pika_layer_add_alpha (*layer);
}
pika_image_insert_layer (new_image, *layer, NULL, 0);
p_init_gdrw (&src_gdrw, src_drawable, FALSE);
p_init_gdrw (&dst_gdrw, PIKA_DRAWABLE (*layer), FALSE);
for (y = 0; y < new_height; y++)
{
for (x = 0; x < new_width; x++)
{
p_get_pixel(&src_gdrw, x * scale, y * scale, &pixel[0]);
p_put_pixel(&dst_gdrw, x, y, &pixel[0]);
}
}
p_end_gdrw (&src_gdrw);
p_end_gdrw (&dst_gdrw);
return new_image;
}
/* ============================================================================
* p_add_layer
* ============================================================================
*/
static PikaLayer *
p_add_layer (gint width,
gint height,
PikaDrawable *src_drawable)
{
PikaImageType type;
PikaLayer *new_layer;
char *name;
char *name2;
gdouble opacity;
PikaLayerMode mode;
gint visible;
PikaImage *image;
gint stack_position;
image = pika_item_get_image (PIKA_ITEM (src_drawable));
stack_position = 0; /* TODO: should be same as src_layer */
/* copy type, name, opacity and mode from src_drawable */
type = pika_drawable_type (src_drawable);
visible = pika_item_get_visible (PIKA_ITEM (src_drawable));
name2 = pika_item_get_name (PIKA_ITEM (src_drawable));
name = g_strdup_printf ("%s_b", name2);
g_free (name2);
mode = pika_layer_get_mode (PIKA_LAYER (src_drawable));
opacity = pika_layer_get_opacity (PIKA_LAYER (src_drawable)); /* full opacity */
new_layer = pika_layer_new (image, name,
width, height,
type,
opacity,
mode);
g_free (name);
if (! pika_drawable_has_alpha (PIKA_DRAWABLE (new_layer)))
{
/* always add alpha channel */
pika_layer_add_alpha (new_layer);
}
/* add the copied layer to the temp. working image */
pika_image_insert_layer (image, new_layer, NULL, stack_position);
/* copy visibility state */
pika_item_set_visible (PIKA_ITEM (new_layer), visible);
return new_layer;
}
/* ============================================================================
* p_bender_calculate_iter_curve
* ============================================================================
*/
static void
p_bender_calculate_iter_curve (BenderDialog *cd,
gint32 xmax,
gint32 ymax)
{
gint x;
gint outline;
BenderDialog *cd_from;
BenderDialog *cd_to;
outline = cd->outline;
if ((cd->bval_from == NULL) ||
(cd->bval_to == NULL) ||
(cd->bval_curr == NULL))
{
if(gb_debug) g_printf("p_bender_calculate_iter_curve NORMAL1\n");
if (cd->curve_type == SMOOTH)
{
cd->outline = OUTLINE_UPPER;
bender_calculate_curve (cd, xmax, ymax, FALSE);
cd->outline = OUTLINE_LOWER;
bender_calculate_curve (cd, xmax, ymax, FALSE);
}
else
{
p_stretch_curves(cd, xmax, ymax);
}
}
else
{
/* compose curves by iterating between FROM/TO values */
if(gb_debug) g_printf ("p_bender_calculate_iter_curve ITERmode 1\n");
/* init FROM curves */
cd_from = g_new (BenderDialog, 1);
p_cd_from_bval (cd_from, cd->bval_from);
cd_from->curve_ptr[OUTLINE_UPPER] = g_new (gint32, 1+xmax);
cd_from->curve_ptr[OUTLINE_LOWER] = g_new (gint32, 1+xmax);
/* init TO curves */
cd_to = g_new (BenderDialog, 1);
p_cd_from_bval (cd_to, cd->bval_to);
cd_to->curve_ptr[OUTLINE_UPPER] = g_new (gint32, 1+xmax);
cd_to->curve_ptr[OUTLINE_LOWER] = g_new (gint32, 1+xmax);
if (cd_from->curve_type == SMOOTH)
{
/* calculate FROM curves */
cd_from->outline = OUTLINE_UPPER;
bender_calculate_curve (cd_from, xmax, ymax, FALSE);
cd_from->outline = OUTLINE_LOWER;
bender_calculate_curve (cd_from, xmax, ymax, FALSE);
}
else
{
p_stretch_curves (cd_from, xmax, ymax);
}
if (cd_to->curve_type == SMOOTH)
{
/* calculate TO curves */
cd_to->outline = OUTLINE_UPPER;
bender_calculate_curve (cd_to, xmax, ymax, FALSE);
cd_to->outline = OUTLINE_LOWER;
bender_calculate_curve (cd_to, xmax, ymax, FALSE);
}
else
{
p_stretch_curves (cd_to, xmax, ymax);
}
/* MIX Y-koords of the curves according to current iteration step */
for (x = 0; x <= xmax; x++)
{
p_delta_gint32 (&cd->curve_ptr[OUTLINE_UPPER][x],
cd_from->curve_ptr[OUTLINE_UPPER][x],
cd_to->curve_ptr[OUTLINE_UPPER][x],
cd->bval_curr->total_steps,
cd->bval_curr->current_step);
p_delta_gint32 (&cd->curve_ptr[OUTLINE_LOWER][x],
cd_from->curve_ptr[OUTLINE_LOWER][x],
cd_to->curve_ptr[OUTLINE_LOWER][x],
cd->bval_curr->total_steps,
cd->bval_curr->current_step);
}
g_free (cd_from->curve_ptr[OUTLINE_UPPER]);
g_free (cd_from->curve_ptr[OUTLINE_LOWER]);
g_free (cd_from);
g_free (cd_to);
}
cd->outline = outline;
}
/* ============================================================================
* p_vertical_bend
* ============================================================================
*/
static void
p_vertical_bend (BenderDialog *cd,
t_GDRW *src_gdrw,
t_GDRW *dst_gdrw)
{
gint32 row, col;
gint32 first_row, first_col, last_row, last_col;
gint32 x, y;
gint32 x2, y2;
gint32 curvy, nb_curvy, nb2_curvy;
gint32 desty, othery;
gint32 miny, maxy;
gint32 sign, dy, diff;
gint32 topshift;
float progress_step;
float progress_max;
float progress;
t_Last *last_arr;
t_Last *first_arr;
guchar color[4];
guchar mixcolor[4];
gint alias_dir;
guchar mixmask;
topshift = p_upper_curve_extend (cd,
src_gdrw->width,
src_gdrw->height);
diff = curvy = nb_curvy = nb2_curvy= miny = maxy = 0;
/* allocate array of last values (one element foreach x coordinate) */
last_arr = g_new (t_Last, src_gdrw->x2);
first_arr = g_new (t_Last, src_gdrw->x2);
/* ------------------------------------------------
* foreach pixel in the SAMPLE_drawable:
* ------------------------------------------------
* the inner loops (x/y) are designed to process
* all pixels of one tile in the sample drawable, the outer loops (row/col) do step
* to the next tiles. (this was done to reduce tile swapping)
*/
first_row = src_gdrw->y1 / src_gdrw->tile_height;
last_row = (src_gdrw->y2 / src_gdrw->tile_height);
first_col = src_gdrw->x1 / src_gdrw->tile_width;
last_col = (src_gdrw->x2 / src_gdrw->tile_width);
/* init progress */
progress_max = (1 + last_row - first_row) * (1 + last_col - first_col);
progress_step = 1.0 / progress_max;
progress = 0.0;
if (cd->show_progress)
pika_progress_init ( _("Curve Bend"));
for (row = first_row; row <= last_row; row++)
{
for (col = first_col; col <= last_col; col++)
{
if (col == first_col)
x = src_gdrw->x1;
else
x = col * src_gdrw->tile_width;
if (col == last_col)
x2 = src_gdrw->x2;
else
x2 = (col +1) * src_gdrw->tile_width;
if (cd->show_progress)
pika_progress_update (progress += progress_step);
for( ; x < x2; x++)
{
if (row == first_row)
y = src_gdrw->y1;
else
y = row * src_gdrw->tile_height;
if (row == last_row)
y2 = src_gdrw->y2;
else
y2 = (row +1) * src_gdrw->tile_height ;
for( ; y < y2; y++)
{
/* ---------- copy SRC_PIXEL to curve position ------ */
p_get_pixel (src_gdrw, x, y, color);
curvy = p_curve_get_dy (cd, x,
(gint32)src_gdrw->width,
(gint32)src_gdrw->height,
(gdouble)y);
desty = y + topshift + curvy;
/* ----------- SMOOTHING ------------------ */
if (cd->smoothing && (x > 0))
{
nb_curvy = p_curve_get_dy (cd, x -1,
(gint32)src_gdrw->width,
(gint32)src_gdrw->height,
(gdouble)y);
if ((nb_curvy == curvy) && (x > 1))
{
nb2_curvy = p_curve_get_dy (cd, x -2,
(gint32)src_gdrw->width,
(gint32)src_gdrw->height,
(gdouble)y);
}
else
{
nb2_curvy = nb_curvy;
}
p_put_mix_pixel (dst_gdrw, x, desty, color, nb_curvy, nb2_curvy, curvy);
}
else
{
p_put_pixel (dst_gdrw, x, desty, color);
}
/* ----------- render ANTIALIAS ------------------ */
if (cd->antialias)
{
othery = desty;
if (y == src_gdrw->y1) /* Upper outline */
{
first_arr[x].y = curvy;
memcpy (first_arr[x].color, color,
dst_gdrw->bpp);
if (x > 0)
{
memcpy (mixcolor, first_arr[x-1].color,
dst_gdrw->bpp);
diff = abs(first_arr[x - 1].y - curvy) +1;
miny = MIN(first_arr[x - 1].y, curvy) -1;
maxy = MAX(first_arr[x - 1].y, curvy) +1;
othery = (src_gdrw->y2 -1)
+ topshift
+ p_curve_get_dy(cd, x,
(gint32)src_gdrw->width,
(gint32)src_gdrw->height,
(gdouble)(src_gdrw->y2 -1));
}
}
if (y == src_gdrw->y2 - 1) /* Lower outline */
{
if (x > 0)
{
memcpy (mixcolor, last_arr[x-1].color,
dst_gdrw->bpp);
diff = abs (last_arr[x - 1].y - curvy) +1;
maxy = MAX (last_arr[x - 1].y, curvy) +1;
miny = MIN (last_arr[x - 1].y, curvy) -1;
}
othery = (src_gdrw->y1)
+ topshift
+ p_curve_get_dy(cd, x,
(gint32)src_gdrw->width,
(gint32)src_gdrw->height,
(gdouble)(src_gdrw->y1));
}
if(desty < othery) { alias_dir = 1; } /* fade to transp. with descending dy */
else if(desty > othery) { alias_dir = -1; } /* fade to transp. with ascending dy */
else { alias_dir = 0; } /* no antialias at curve crossing point(s) */
if (alias_dir != 0)
{
guchar alpha_lo = 20;
if (pika_drawable_has_alpha (src_gdrw->drawable))
{
alpha_lo = MIN (20, mixcolor[src_gdrw->index_alpha]);
}
for (dy = 0; dy < diff; dy++)
{
/* iterate for fading alpha channel */
mixmask = 255 * ((gdouble)(dy + 1) / (gdouble) (diff+1));
mixcolor[dst_gdrw->index_alpha] = MIX_CHANNEL(color[dst_gdrw->index_alpha], alpha_lo, mixmask);
if(alias_dir > 0)
{
p_put_pixel (dst_gdrw, x -1, y + topshift + miny + dy, mixcolor);
}
else
{
p_put_pixel (dst_gdrw, x -1, y + topshift + (maxy - dy), mixcolor);
}
}
}
}
/* ------------------ FILL HOLES ------------------ */
if (y == src_gdrw->y1)
{
diff = 0;
sign = 1;
}
else
{
diff = last_arr[x].y - curvy;
if (diff < 0)
{
diff = 0 - diff;
sign = -1;
}
else
{
sign = 1;
}
memcpy (mixcolor, color, dst_gdrw->bpp);
}
for (dy = 1; dy <= diff; dy++)
{
/* y differs more than 1 pixel from last y in the
* destination drawable. So we have to fill the empty
* space between using a mixed color
*/
if (cd->smoothing)
{
/* smoothing is on, so we are using a mixed color */
gulong alpha1 = last_arr[x].color[3];
gulong alpha2 = color[3];
gulong alpha;
mixmask = 255 * ((gdouble)(dy) / (gdouble)(diff+1));
alpha = alpha1 * mixmask + alpha2 * (255 - mixmask);
mixcolor[3] = alpha/255;
if (mixcolor[3])
{
mixcolor[0] = (alpha1 * mixmask * last_arr[x].color[0]
+ alpha2 * (255 - mixmask) * color[0])/alpha;
mixcolor[1] = (alpha1 * mixmask * last_arr[x].color[1]
+ alpha2 * (255 - mixmask) * color[1])/alpha;
mixcolor[2] = (alpha1 * mixmask * last_arr[x].color[2]
+ alpha2 * (255 - mixmask) * color[2])/alpha;
/*mixcolor[2] = MIX_CHANNEL(last_arr[x].color[2], color[2], mixmask);*/
}
}
else
{
/* smoothing is off, so we are using this color or
the last color */
if (dy < diff / 2)
{
memcpy (mixcolor, color,
dst_gdrw->bpp);
}
else
{
memcpy (mixcolor, last_arr[x].color,
dst_gdrw->bpp);
}
}
if (cd->smoothing)
{
p_put_mix_pixel (dst_gdrw, x,
desty + (dy * sign),
mixcolor,
nb_curvy, nb2_curvy, curvy );
}
else
{
p_put_pixel (dst_gdrw, x,
desty + (dy * sign), mixcolor);
}
}
/* store y and color */
last_arr[x].y = curvy;
memcpy (last_arr[x].color, color, dst_gdrw->bpp);
}
}
}
}
pika_progress_update (1.0);
g_free (last_arr);
g_free (first_arr);
}
/* ============================================================================
* p_main_bend
* ============================================================================
*/
static PikaLayer *
p_main_bend (BenderDialog *cd,
PikaDrawable *original_drawable,
gint work_on_copy)
{
t_GDRW src_gdrw;
t_GDRW dst_gdrw;
PikaDrawable *src_drawable;
PikaDrawable *dst_drawable;
gint src_width;
gint src_height;
gint32 dst_height;
PikaImage *image;
PikaLayer *tmp_layer;
gint32 interpolation;
gint offset_x, offset_y;
gint center_x, center_y;
gint32 xmax, ymax;
interpolation = cd->smoothing;
image = pika_item_get_image (PIKA_ITEM (original_drawable));
pika_drawable_get_offsets (original_drawable, &offset_x, &offset_y);
center_x = offset_x + (pika_drawable_get_width (original_drawable) / 2 );
center_y = offset_y + (pika_drawable_get_height (original_drawable) / 2 );
/* always copy original_drawable to a tmp src_layer */
tmp_layer = pika_layer_copy (PIKA_LAYER (original_drawable));
/* set layer invisible and dummyname and
* add at top of the image while working
* (for the case of undo PIKA must know,
* that the layer was part of the image)
*/
pika_image_insert_layer (image, tmp_layer, NULL, 0);
pika_item_set_visible (PIKA_ITEM (tmp_layer), FALSE);
pika_item_set_name (PIKA_ITEM (tmp_layer), "curve_bend_dummylayer");
if(gb_debug) g_printf("p_main_bend tmp_layer_id %d\n",
(int) pika_item_get_id (PIKA_ITEM (tmp_layer)));
if (cd->rotation != 0.0)
{
if(gb_debug) g_printf("p_main_bend rotate: %f\n", (float)cd->rotation);
p_pika_rotate (image, PIKA_DRAWABLE (tmp_layer),
interpolation, cd->rotation);
}
src_drawable = PIKA_DRAWABLE (tmp_layer);
src_width = pika_drawable_get_width (PIKA_DRAWABLE (tmp_layer));
src_height = pika_drawable_get_height (PIKA_DRAWABLE (tmp_layer));
xmax = ymax = src_width -1;
cd->curve_ptr[OUTLINE_UPPER] = g_new (gint32, 1+xmax);
cd->curve_ptr[OUTLINE_LOWER] = g_new (gint32, 1+xmax);
p_bender_calculate_iter_curve(cd, xmax, ymax);
bender_init_min_max(cd, xmax);
dst_height = src_height
+ p_upper_curve_extend(cd, src_width, src_height)
+ p_lower_curve_extend(cd, src_width, src_height);
if(gb_debug) g_printf("p_main_bend: dst_height:%d\n", dst_height);
if (work_on_copy)
{
dst_drawable = PIKA_DRAWABLE (p_add_layer (src_width, dst_height,
src_drawable));
if (gb_debug) g_printf("p_main_bend: DONE add layer\n");
}
else
{
/* work on the original */
pika_layer_resize (PIKA_LAYER (original_drawable),
src_width,
dst_height,
offset_x, offset_y);
if (gb_debug) g_printf("p_main_bend: DONE layer resize\n");
if (! pika_drawable_has_alpha (original_drawable))
{
/* always add alpha channel */
pika_layer_add_alpha (PIKA_LAYER (original_drawable));
}
dst_drawable = original_drawable;
}
pika_drawable_fill (dst_drawable, PIKA_FILL_TRANSPARENT);
p_init_gdrw (&src_gdrw, src_drawable, FALSE);
p_init_gdrw (&dst_gdrw, dst_drawable, FALSE);
p_vertical_bend (cd, &src_gdrw, &dst_gdrw);
if(gb_debug) g_printf("p_main_bend: DONE vertical bend\n");
p_end_gdrw (&src_gdrw);
p_end_gdrw (&dst_gdrw);
if (cd->rotation != 0.0)
{
p_pika_rotate (image, dst_drawable,
interpolation, (gdouble)(360.0 - cd->rotation));
/* TODO: here we should crop dst_drawable to cut off full transparent borderpixels */
}
/* set offsets of the resulting new layer
*(center == center of original_drawable)
*/
offset_x = center_x - (pika_drawable_get_width (dst_drawable) / 2 );
offset_y = center_y - (pika_drawable_get_height (dst_drawable) / 2 );
pika_layer_set_offsets (PIKA_LAYER (dst_drawable), offset_x, offset_y);
/* delete the temp layer */
pika_image_remove_layer (image, tmp_layer);
g_free (cd->curve_ptr[OUTLINE_UPPER]);
g_free (cd->curve_ptr[OUTLINE_LOWER]);
if (gb_debug) g_printf("p_main_bend: DONE bend main\n");
return PIKA_LAYER (dst_drawable);
}
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