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gimp/plug-ins/common/curve_bend.c

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/* curve_bend plugin for the GIMP */
/* The GIMP -- an image manipulation program
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* 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 gimp_undo_push_group_end
* after gimp_displays_flush
* (1999/09/13) v1.01 hof: PDB-calls updated for gimp 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 <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
/* Defines */
#define PLUG_IN_PROC "plug-in-curve-bend"
#define PLUG_IN_BINARY "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 SIGNED_ROUND(x) ((int) (((x < 0) ? (x) - 0.5 : (x) + 0.5) ))
#define MIX_CHANNEL(a, b, m) (((a * m) + (b * (255 - m))) / 255)
#define UP_GRAPH 0x1
#define UP_XRANGE_TOP 0x2
#define UP_PREVIEW_EXPOSE 0x4
#define UP_PREVIEW 0x8
#define UP_DRAW 0x10
#define UP_ALL 0xFF
#define ENTRY_WIDTH 50
#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 */
int 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;
GdkPixmap *pixmap;
GtkWidget *filechooser;
GdkCursor *cursor_busy;
GimpDrawable *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];
gint show_progress;
gint smoothing;
gint antialias;
gint work_on_copy;
gdouble rotation;
gint32 preview_image_id;
gint32 preview_layer_id1;
gint32 preview_layer_id2;
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
{
GimpDrawable *drawable;
gint x1;
gint y1;
gint x2;
gint y2;
gint index_alpha; /* 0 == no alpha, 1 == GREYA, 3 == RGBA */
gint bpp;
GimpPixelFetcher *pft;
gint tile_width;
gint tile_height;
} t_GDRW;
typedef struct
{
gint32 y;
guchar color[4];
} t_Last;
/* curves action functions */
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static BenderDialog * bender_new_dialog (GimpDrawable *);
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 void bender_CR_compose (CRMatrix, CRMatrix,
CRMatrix);
static void bender_init_min_max (BenderDialog *, gint32);
static BenderDialog * do_dialog (GimpDrawable *);
static void p_init_gdrw (t_GDRW *gdrw, GimpDrawable *drawable,
int dirty, int shadow);
static void p_end_gdrw (t_GDRW *gdrw);
static gint32 p_main_bend (BenderDialog *, GimpDrawable *, gint);
static gint32 p_create_pv_image (GimpDrawable *src_drawable, gint32 *layer_id);
static void p_render_preview (BenderDialog *cd, gint32 layer_id);
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_gdouble (double *val, double val_from, double val_to,
gint32 total_steps, gdouble current_step);
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, gdouble *floatarray);
static void p_copy_yval (BenderDialog *cd, int outline,
int argc, gint8 *int8array);
static int p_save_pointfile (BenderDialog *cd, const gchar *filename);
/* Global Variables */
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run /* run_proc */
};
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;
/* Functions */
/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX PDB_STUFF XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
#ifdef ROTATE_OPTIMIZE
/* ============================================================================
* p_pdb_procedure_available
* if requested procedure is available in the PDB return the number of args
* (0 upto n) that are needed to call the procedure.
* if not available return -1
* ============================================================================
*/
static gint
p_pdb_procedure_available (const gchar *proc_name)
{
gint l_nparams;
gint l_nreturn_vals;
GimpPDBProcType l_proc_type;
gchar *l_proc_blurb;
gchar *l_proc_help;
gchar *l_proc_author;
gchar *l_proc_copyright;
gchar *l_proc_date;
GimpParamDef *l_params;
GimpParamDef *l_return_vals;
gint l_rc;
l_rc = 0;
/* Query the gimp application's procedural database
* regarding a particular procedure.
*/
if (gimp_procedural_db_proc_info (proc_name,
&l_proc_blurb,
&l_proc_help,
&l_proc_author,
&l_proc_copyright,
&l_proc_date,
&l_proc_type,
&l_nparams, &l_nreturn_vals,
&l_params, &l_return_vals))
{
/* procedure found in PDB */
return l_nparams;
}
g_printerr ("Warning: Procedure %s not found.\n", proc_name);
return -1;
}
#endif /* ROTATE_OPTIMIZE */
static gint
p_gimp_rotate (gint32 image_id,
gint32 drawable_id,
gint32 interpolation,
gdouble angle_deg)
{
gdouble l_angle_rad;
gint l_rc;
#ifdef ROTATE_OPTIMIZE
static gchar *l_rotate_proc = "plug-in-rotate";
GimpParam *return_vals;
gint nreturn_vals;
gint32 l_angle_step;
gint l_nparams;
if (angle_deg == 90.0) { l_angle_step = 1; }
else if(angle_deg == 180.0) { l_angle_step = 2; }
else if(angle_deg == 270.0) { l_angle_step = 3; }
else { l_angle_step = 0; }
if (l_angle_step != 0)
{
l_nparams = p_pdb_procedure_available (l_rotate_proc);
if (l_nparams == 5)
{
/* use faster rotate plugin on multiples of 90 degrees */
return_vals = gimp_run_procedure (l_rotate_proc,
&nreturn_vals,
GIMP_PDB_INT32, GIMP_RUN_NONINTERACTIVE,
GIMP_PDB_IMAGE, image_id,
GIMP_PDB_DRAWABLE, drawable_id,
GIMP_PDB_INT32, l_angle_step,
GIMP_PDB_INT32, FALSE, /* dont rotate the whole image */
GIMP_PDB_END);
if (return_vals[0].data.d_status == GIMP_PDB_SUCCESS)
{
return 0;
}
}
}
#endif /* ROTATE_OPTIMIZE */
l_angle_rad = (angle_deg * G_PI) / 180.0;
l_rc = gimp_drawable_transform_rotate_default (drawable_id, l_angle_rad,
TRUE, 0, 0, interpolation,
FALSE);
if (l_rc == -1)
g_printerr ("Error: gimp_drawable_transform_rotate_default call failed\n");
return l_rc;
}
/* ============================================================================
* p_if_selection_float_it
* ============================================================================
*/
static gint32
p_if_selection_float_it (gint32 image_id,
gint32 layer_id)
{
if (! gimp_layer_is_floating_sel (layer_id))
{
gint32 l_sel_channel_id;
gint32 l_x1, l_x2, l_y1, l_y2;
gint32 non_empty;
/* check and see if we have a selection mask */
l_sel_channel_id = gimp_image_get_selection (image_id);
gimp_selection_bounds (image_id, &non_empty, &l_x1, &l_y1, &l_x2, &l_y2);
if (non_empty && l_sel_channel_id >= 0)
{
/* selection is TRUE, make a layer (floating selection) from
the selection */
if (gimp_edit_copy (layer_id))
{
layer_id = gimp_edit_paste (layer_id, FALSE);
}
else
{
return -1;
}
}
}
return layer_id;
}
/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX END_PDB_STUFF XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
/*
* M M AAAAA IIIIII N N
* M M M M A A II NN N
* M M M AAAAAAA II N N N
* M M A A II N NN
* M M A A IIIIII N N
*/
MAIN ()
static void
query (void)
{
static const GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive"},
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable (must be a layer without layermask)"},
{ GIMP_PDB_FLOAT, "rotation", "Direction {angle 0 to 360 degree } of the bend effect"},
{ GIMP_PDB_INT32, "smoothing", "Smoothing { TRUE, FALSE }"},
{ GIMP_PDB_INT32, "antialias", "Antialias { TRUE, FALSE }"},
{ GIMP_PDB_INT32, "work_on_copy", "{ TRUE, FALSE } TRUE: copy the drawable and bend the copy"},
{ GIMP_PDB_INT32, "curve_type", " { 0, 1 } 0 == smooth (use 17 points), 1 == freehand (use 256 val_y) "},
{ GIMP_PDB_INT32, "argc_upper_point_x", "{2 <= argc <= 17} "},
{ GIMP_PDB_FLOATARRAY, "upper_point_x", "array of 17 x point_koords { 0.0 <= x <= 1.0 or -1 for unused point }"},
{ GIMP_PDB_INT32, "argc_upper_point_y", "{2 <= argc <= 17} "},
{ GIMP_PDB_FLOATARRAY, "upper_point_y", "array of 17 y point_koords { 0.0 <= y <= 1.0 or -1 for unused point }"},
{ GIMP_PDB_INT32, "argc_lower_point_x", "{2 <= argc <= 17} "},
{ GIMP_PDB_FLOATARRAY, "lower_point_x", "array of 17 x point_koords { 0.0 <= x <= 1.0 or -1 for unused point }"},
{ GIMP_PDB_INT32, "argc_lower_point_y", "{2 <= argc <= 17} "},
{ GIMP_PDB_FLOATARRAY, "lower_point_y", "array of 17 y point_koords { 0.0 <= y <= 1.0 or -1 for unused point }"},
{ GIMP_PDB_INT32, "argc_upper_val_y", "{ 256 } "},
{ GIMP_PDB_INT8ARRAY, "upper_val_y", "array of 256 y freehand koord { 0 <= y <= 255 }"},
{ GIMP_PDB_INT32, "argc_lower_val_y", "{ 256 } "},
{ GIMP_PDB_INT8ARRAY, "lower_val_y", "array of 256 y freehand koord { 0 <= y <= 255 }"}
};
static const GimpParamDef return_vals[] =
{
{ GIMP_PDB_LAYER, "bent_layer", "the handled layer" }
};
static const GimpParamDef args_iter[] =
{
{ GIMP_PDB_INT32, "run_mode", "non-interactive" },
{ GIMP_PDB_INT32, "total_steps", "total number of steps (# of layers-1 to apply the related plug-in)" },
{ GIMP_PDB_FLOAT, "current_step", "current (for linear iterations this is the layerstack position, otherwise some value inbetween)" },
{ GIMP_PDB_INT32, "len_struct", "length of stored data structure with id is equal to the plug_in proc_name" },
};
/* the actual installation of the bend plugin */
gimp_install_procedure (PLUG_IN_PROC,
N_("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 plugin sets the offsets "
"of the handled layer to keep its center at the "
"same position",
PLUG_IN_AUTHOR,
PLUG_IN_COPYRIGHT,
PLUG_IN_VERSION,
N_("_Curve Bend..."),
PLUG_IN_IMAGE_TYPES,
GIMP_PLUGIN,
G_N_ELEMENTS (args),
G_N_ELEMENTS (return_vals),
args,
return_vals);
gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Filters/Distorts");
/* the installation of the Iterator procedure for the bend plugin */
gimp_install_procedure (PLUG_IN_ITER_NAME,
"This procedure calculates the modified values "
"for one iterationstep for the call of "
"plug_in_curve_bend",
"",
PLUG_IN_AUTHOR,
PLUG_IN_COPYRIGHT,
PLUG_IN_VERSION,
NULL, /* do not appear in menus */
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (args_iter), 0,
args_iter, NULL);
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
const gchar *l_env;
BenderDialog *cd;
GimpDrawable *l_active_drawable = NULL;
gint32 l_active_drawable_id = -1;
gint32 l_image_id = -1;
gint32 l_layer_id = -1;
gint32 l_layer_mask_id = -1;
gint32 l_bent_layer_id = -1;
/* Get the runmode from the in-parameters */
GimpRunMode run_mode = param[0].data.d_int32;
/* status variable, use it to check for errors in invocation usualy only
during non-interactive calling */
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
/*always return at least the status to the caller. */
static GimpParam values[2];
INIT_I18N ();
cd = NULL;
l_env = g_getenv ("BEND_DEBUG");
if (l_env != NULL)
{
if((*l_env != 'n') && (*l_env != 'N')) gb_debug = 1;
}
if (gb_debug) g_printerr ("\n\nDEBUG: run %s\n", name);
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
values[1].type = GIMP_PDB_LAYER;
values[1].data.d_int32 = -1;
*nreturn_vals = 2;
*return_vals = values;
if (strcmp (name, PLUG_IN_ITER_NAME) == 0)
{
gint32 len_struct;
gint32 total_steps;
gdouble current_step;
BenderValues bval; /* current values while iterating */
BenderValues bval_from, bval_to; /* start and end values */
/* Iterator procedure for animated calls is usually called from
* "plug_in_gap_layers_run_animfilter"
* (always run noninteractive)
*/
if ((run_mode == GIMP_RUN_NONINTERACTIVE) && (nparams == 4))
{
total_steps = param[1].data.d_int32;
current_step = param[2].data.d_float;
len_struct = param[3].data.d_int32;
if (len_struct == sizeof (bval))
{
/* get _FROM and _TO data,
* This data was stored by plug_in_gap_layers_run_animfilter
*/
gimp_get_data (PLUG_IN_DATA_ITER_FROM, &bval_from);
gimp_get_data (PLUG_IN_DATA_ITER_TO, &bval_to);
bval = bval_from;
p_delta_gdouble (&bval.rotation, bval_from.rotation,
bval_to.rotation, total_steps, current_step);
/* note: iteration of curve and points arrays would not give useful results.
* (there might be different number of points in the from/to bender values )
* the iteration is done later, (see p_bender_calculate_iter_curve)
* when the curve is calculated.
*/
bval.total_steps = total_steps;
bval.current_step = current_step;
gimp_set_data (PLUG_IN_PROC, &bval, sizeof (bval));
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
values[0].data.d_status = status;
return;
}
/* get image and drawable */
l_image_id = param[1].data.d_int32;
l_layer_id = param[2].data.d_drawable;
gimp_image_undo_group_start (l_image_id);
if (! gimp_drawable_is_layer (l_layer_id))
{
g_message (_("Can operate on layers only (but was called on channel or mask)."));
status = GIMP_PDB_EXECUTION_ERROR;
}
/* check for layermask */
l_layer_mask_id = gimp_layer_get_mask (l_layer_id);
if (l_layer_mask_id >= 0)
{
/* apply the layermask
* some transitions (especially rotate) cant operate proper on
* layers with masks !
*/
if (run_mode == GIMP_RUN_NONINTERACTIVE)
{
gimp_layer_remove_mask (l_layer_id, 0 /* 0==APPLY */ );
}
else
{
g_message (_("Cannot operate on layers with masks."));
status = GIMP_PDB_EXECUTION_ERROR;
}
}
/* if there is a selection, make it the floating selection layer */
l_active_drawable_id = p_if_selection_float_it (l_image_id, l_layer_id);
if (l_active_drawable_id < 0)
{
/* could not float the selection because selection rectangle
* is completely empty return GIMP_PDB_EXECUTION_ERROR
*/
status = GIMP_PDB_EXECUTION_ERROR;
if (run_mode != GIMP_RUN_NONINTERACTIVE)
{
g_message (_("Cannot operate on empty selections."));
}
}
else
{
l_active_drawable = gimp_drawable_get (l_active_drawable_id);
}
/* how are we running today? */
if (status == GIMP_PDB_SUCCESS)
{
/* how are we running today? */
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data from a previous run */
/* gimp_get_data (PLUG_IN_PROC, &g_bndvals); */
/* Get information from the dialog */
cd = do_dialog (l_active_drawable);
cd->show_progress = TRUE;
break;
case GIMP_RUN_NONINTERACTIVE:
/* check to see if invoked with the correct number of parameters */
if (nparams >= 20)
{
cd = g_new (BenderDialog, 1);
cd->run = TRUE;
cd->show_progress = TRUE;
cd->drawable = l_active_drawable;
cd->rotation = (gdouble) param[3].data.d_float;
cd->smoothing = (gint) param[4].data.d_int32;
cd->antialias = (gint) param[5].data.d_int32;
cd->work_on_copy = (gint) param[6].data.d_int32;
cd->curve_type = (gint) param[7].data.d_int32;
p_copy_points (cd, OUTLINE_UPPER, 0,
param[8].data.d_int32,
param[9].data.d_floatarray);
p_copy_points (cd, OUTLINE_UPPER, 1,
param[10].data.d_int32,
param[11].data.d_floatarray);
p_copy_points (cd, OUTLINE_LOWER, 0,
param[12].data.d_int32,
param[13].data.d_floatarray);
p_copy_points (cd, OUTLINE_LOWER, 1,
param[14].data.d_int32,
param[15].data.d_floatarray);
p_copy_yval (cd, OUTLINE_UPPER,
param[16].data.d_int32,
param[17].data.d_int8array);
p_copy_yval (cd, OUTLINE_UPPER,
param[18].data.d_int32,
param[19].data.d_int8array);
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
break;
case GIMP_RUN_WITH_LAST_VALS:
cd = g_new (BenderDialog, 1);
cd->run = TRUE;
cd->show_progress = TRUE;
cd->drawable = l_active_drawable;
p_retrieve_values (cd); /* Possibly retrieve data from a previous run */
break;
default:
break;
}
}
if (! cd)
{
status = GIMP_PDB_EXECUTION_ERROR;
}
if (status == GIMP_PDB_SUCCESS)
{
/* Run the main function */
if (cd->run)
{
l_bent_layer_id = p_main_bend (cd, cd->drawable, cd->work_on_copy);
/* Store variable states for next run */
if (run_mode == GIMP_RUN_INTERACTIVE)
{
p_store_values (cd);
}
}
else
{
status = GIMP_PDB_CANCEL;
}
gimp_image_undo_group_end (l_image_id);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
}
else
{
gimp_image_undo_group_end (l_image_id);
}
values[0].data.d_status = status;
values[1].data.d_int32 = l_bent_layer_id; /* return the id of handled layer */
}
static int
p_save_pointfile (BenderDialog *cd,
const gchar *filename)
{
gint j;
FILE *l_fp;
l_fp = g_fopen(filename, "w+");
if (!l_fp)
{
g_message (_("Could not open '%s' for writing: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return -1;
}
fprintf(l_fp, "%s\n", KEY_POINTFILE);
fprintf(l_fp, "VERSION 1.0\n\n");
fprintf(l_fp, "# points for upper and lower smooth curve (0.0 <= pt <= 1.0)\n");
fprintf(l_fp, "# there are upto 17 points where unused points are set to -1\n");
fprintf(l_fp, "# UPPERX UPPERY LOWERX LOWERY\n");
fprintf(l_fp, "\n");
for(j = 0; j < 17; j++)
{
fprintf(l_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(l_fp, "\n");
fprintf(l_fp, "# y values for upper/lower freehand curve (0 <= y <= 255) \n");
fprintf(l_fp, "# there must be exactly 256 y values \n");
fprintf(l_fp, "# UPPER_Y LOWER_Y\n");
fprintf(l_fp, "\n");
for (j = 0; j < 256; j++)
{
fprintf(l_fp, "%s %3d %3d\n", KEY_VAL_Y,
(int)cd->curve[OUTLINE_UPPER][j],
(int)cd->curve[OUTLINE_LOWER][j]);
}
fclose(l_fp);
return 0;
}
static int
p_load_pointfile (BenderDialog *cd,
const gchar *filename)
{
gint l_pi, l_ci, l_n, l_len;
FILE *l_fp;
char l_buff[2000];
float l_fux, l_fuy, l_flx, l_fly;
gint l_iuy, l_ily ;
l_fp = g_fopen(filename, "r");
if (!l_fp)
{
g_message (_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return -1;
}
l_pi = 0;
l_ci = 0;
fgets (l_buff, 2000 - 1, l_fp);
if (strncmp(l_buff, KEY_POINTFILE, strlen(KEY_POINTFILE)) == 0)
{
while (NULL != fgets (l_buff, 2000-1, l_fp))
{
l_len = strlen(KEY_POINTS);
if(strncmp(l_buff, KEY_POINTS, l_len) == 0)
{
l_n = sscanf(&l_buff[l_len], "%f %f %f %f", &l_fux, &l_fuy, &l_flx, &l_fly);
if((l_n == 4) && (l_pi < 17))
{
cd->points[OUTLINE_UPPER][l_pi][0] = l_fux;
cd->points[OUTLINE_UPPER][l_pi][1] = l_fuy;
cd->points[OUTLINE_LOWER][l_pi][0] = l_flx;
cd->points[OUTLINE_LOWER][l_pi][1] = l_fly;
l_pi++;
}
else
{
printf("warnig: BAD points[%d] in file %s are ignored\n", l_pi, filename);
}
}
l_len = strlen(KEY_VAL_Y);
if (strncmp(l_buff, KEY_VAL_Y, l_len) == 0)
{
l_n = sscanf(&l_buff[l_len], "%d %d", &l_iuy, &l_ily);
if ((l_n == 2) && (l_ci < 256))
{
cd->curve[OUTLINE_UPPER][l_ci] = l_iuy;
cd->curve[OUTLINE_LOWER][l_ci] = l_ily;
l_ci++;
}
else
{
printf("warnig: BAD y_vals[%d] in file %s are ignored\n", l_ci, filename);
}
}
}
}
fclose(l_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 l_bval;
p_cd_to_bval(cd, &l_bval);
gimp_set_data(PLUG_IN_PROC, &l_bval, sizeof(l_bval));
}
static void
p_retrieve_values (BenderDialog *cd)
{
BenderValues l_bval;
l_bval.total_steps = 0;
l_bval.current_step = -444.4; /* init with an invalid dummy value */
gimp_get_data (PLUG_IN_PROC, &l_bval);
if (l_bval.total_steps == 0)
{
cd->bval_from = NULL;
cd->bval_to = NULL;
if(l_bval.current_step != -444.4)
{
/* last_value data was retrieved (and dummy value was overwritten) */
p_cd_from_bval(cd, &l_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 = l_bval;
/* it seems that we are called from GAP with "Varying Values" */
gimp_get_data(PLUG_IN_DATA_ITER_FROM, cd->bval_from);
gimp_get_data(PLUG_IN_DATA_ITER_TO, cd->bval_to);
*cd->bval_curr = l_bval;
p_cd_from_bval(cd, cd->bval_curr);
cd->work_on_copy = FALSE;
}
}
static void
p_delta_gdouble (double *val,
double val_from,
double 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_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;
}
void
p_copy_points (BenderDialog *cd,
int outline,
int xy,
int argc,
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];
}
}
void
p_copy_yval (BenderDialog *cd,
int outline,
int argc,
gint8 *int8array)
{
int j;
guchar fill;
fill = MIDDLE;
for (j = 0; j < 256; j++)
{
if (j < argc)
{
fill = cd->curve[outline][j] = int8array[j];
}
else
{
cd->curve[outline][j] = fill;
}
}
}
/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
/* curves machinery */
/* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
static BenderDialog *
do_dialog (GimpDrawable *drawable)
{
BenderDialog *cd;
/* Init GTK */
gimp_ui_init (PLUG_IN_BINARY, TRUE);
/* The curve_bend dialog */
cd = bender_new_dialog (drawable);
/* create temporary image (with a small copy of drawable) for the preview */
cd->preview_image_id = p_create_pv_image(drawable, &cd->preview_layer_id1);
cd->preview_layer_id2 = -1;
if (!GTK_WIDGET_VISIBLE (cd->shell))
gtk_widget_show (cd->shell);
bender_update (cd, UP_GRAPH | UP_DRAW | UP_PREVIEW_EXPOSE);
gtk_main ();
gdk_flush ();
gimp_image_delete(cd->preview_image_id);
cd->preview_image_id = -1;
cd->preview_layer_id1 = -1;
cd->preview_layer_id2 = -1;
return cd;
}
/**************************/
/* Select Curves dialog */
/**************************/
static BenderDialog *
bender_new_dialog (GimpDrawable *drawable)
{
BenderDialog *cd;
GtkWidget *main_hbox;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *vbox2;
GtkWidget *abox;
GtkWidget *frame;
GtkWidget *upper, *lower;
GtkWidget *smooth, *freew;
GtkWidget *toggle;
GtkWidget *button;
GtkWidget *spinbutton;
GtkWidget *label;
GtkObject *data;
GdkDisplay *display;
gint i, j;
cd = g_new (BenderDialog, 1);
cd->preview = FALSE;
cd->curve_type = SMOOTH;
cd->pixmap = NULL;
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 = gimp_drawable_is_rgb (cd->drawable->drawable_id);
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 = gimp_dialog_new (_("Curve Bend"), PLUG_IN_BINARY,
NULL, 0,
gimp_standard_help_func, PLUG_IN_PROC,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (cd->shell),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gimp_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_hbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_hbox), 12);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (cd->shell)->vbox), main_hbox);
gtk_widget_show (main_hbox);
/* Left side column */
vbox = gtk_vbox_new (FALSE, 12);
gtk_container_add (GTK_CONTAINER (main_hbox), vbox);
gtk_widget_show (vbox);
/* Preview area, top of column */
frame = gimp_frame_new (_("Preview"));
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
vbox2 = gtk_vbox_new (FALSE, 6);
gtk_container_add (GTK_CONTAINER (frame), vbox2);
gtk_widget_show (vbox2);
abox = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
gtk_box_pack_start (GTK_BOX (vbox2), abox, FALSE, FALSE, 0);
gtk_widget_show (abox);
/* The range drawing area */
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_container_add (GTK_CONTAINER (abox), frame);
gtk_widget_show (frame);
cd->pv_widget = gimp_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_hbox_new (FALSE, 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 = gimp_frame_new (_("Options"));
gtk_box_pack_end (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
vbox = gtk_vbox_new (FALSE, 6);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
/* Render Options */
hbox = gtk_hbox_new (FALSE, 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);
spinbutton = gimp_spin_button_new (&data,
0, 0.0, 360.0, 1, 45, 90,
0.5, 1);
cd->rotate_data = GTK_ADJUSTMENT (data);
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 = gimp_frame_new (_("Modify Curves"));
gtk_container_add (GTK_CONTAINER (main_hbox), frame);
gtk_widget_show (frame);
vbox = gtk_vbox_new (FALSE, 12);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_widget_show (vbox);
abox = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
gtk_box_pack_start (GTK_BOX (vbox), abox, FALSE, FALSE, 0);
gtk_widget_show (abox);
cd->graph = gtk_drawing_area_new ();
gtk_widget_set_size_request (cd->graph,
GRAPH_WIDTH + RADIUS * 2,
GRAPH_HEIGHT + RADIUS * 2);
gtk_widget_set_events (cd->graph, GRAPH_MASK);
gtk_container_add (GTK_CONTAINER (abox), cd->graph);
gtk_widget_show (cd->graph);
g_signal_connect (cd->graph, "event",
G_CALLBACK (bender_graph_events),
cd);
hbox = gtk_hbox_new (FALSE, 12);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
frame = gimp_int_radio_group_new (TRUE, _("Curve for Border"),
G_CALLBACK (bender_border_callback),
&cd->outline, cd->outline,
_("_Upper"), OUTLINE_UPPER, &upper,
_("_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 = gimp_int_radio_group_new (TRUE, _("Curve Type"),
G_CALLBACK (bender_type_callback),
&cd->curve_type, 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_hbox_new (FALSE, 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);
gimp_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);
gimp_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);
gimp_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_from_stock (GIMP_STOCK_RESET);
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
gimp_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_hbox_new (FALSE, 4);
gtk_box_pack_end (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* The Load button */
button = gtk_button_new_from_stock (GTK_STOCK_OPEN);
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
gimp_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_from_stock (GTK_STOCK_SAVE);
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
gimp_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)
{
gint i;
gint other;
if (update & UP_PREVIEW)
{
gdk_window_set_cursor (GTK_WIDGET (cd->shell)->window, cd->cursor_busy);
gdk_flush ();
if (cd->preview_layer_id2 >= 0)
gimp_image_remove_layer(cd->preview_image_id, cd->preview_layer_id2);
cd->preview_layer_id2 = p_main_bend(cd, gimp_drawable_get (cd->preview_layer_id1), TRUE /* work_on_copy*/ );
p_render_preview(cd, cd->preview_layer_id2);
if (update & UP_DRAW)
gtk_widget_queue_draw (cd->pv_widget);
gdk_window_set_cursor (GTK_WIDGET (cd->shell)->window, NULL);
}
if (update & UP_PREVIEW_EXPOSE)
{
/* on expose just redraw cd->preview_layer_id2
* that holds the bent version of the preview (if there is one)
*/
if (cd->preview_layer_id2 < 0)
cd->preview_layer_id2 = p_main_bend(cd, gimp_drawable_get (cd->preview_layer_id1), TRUE /* work_on_copy*/ );
p_render_preview(cd, cd->preview_layer_id2);
if (update & UP_DRAW)
gtk_widget_queue_draw (cd->pv_widget);
}
if ((update & UP_GRAPH) && (update & UP_DRAW) && cd->pixmap != NULL)
{
GdkPoint points[256];
/* Clear the pixmap */
gdk_draw_rectangle (cd->pixmap, cd->graph->style->bg_gc[GTK_STATE_NORMAL],
TRUE, 0, 0, GRAPH_WIDTH + RADIUS * 2, GRAPH_HEIGHT + RADIUS * 2);
/* Draw the grid lines */
for (i = 0; i < 5; i++)
{
gdk_draw_line (cd->pixmap, cd->graph->style->dark_gc[GTK_STATE_NORMAL],
RADIUS, i * (GRAPH_HEIGHT / 4) + RADIUS,
GRAPH_WIDTH + RADIUS, i * (GRAPH_HEIGHT / 4) + RADIUS);
gdk_draw_line (cd->pixmap, cd->graph->style->dark_gc[GTK_STATE_NORMAL],
i * (GRAPH_WIDTH / 4) + RADIUS, RADIUS,
i * (GRAPH_WIDTH / 4) + RADIUS, GRAPH_HEIGHT + RADIUS);
}
/* Draw the other curve */
other = (cd->outline == 0) ? 1 : 0;
for (i = 0; i < 256; i++)
{
points[i].x = i + RADIUS;
points[i].y = 255 - cd->curve[other][i] + RADIUS;
}
gdk_draw_points (cd->pixmap, cd->graph->style->dark_gc[GTK_STATE_NORMAL], points, 256);
/* Draw the active curve */
for (i = 0; i < 256; i++)
{
points[i].x = i + RADIUS;
points[i].y = 255 - cd->curve[cd->outline][i] + RADIUS;
}
gdk_draw_points (cd->pixmap, cd->graph->style->black_gc, points, 256);
/* Draw the points */
if (cd->curve_type == SMOOTH)
{
for (i = 0; i < 17; i++)
{
if (cd->points[cd->outline][i][0] != -1)
gdk_draw_arc (cd->pixmap, cd->graph->style->black_gc, TRUE,
(cd->points[cd->outline][i][0] * 255.0),
255 - (cd->points[cd->outline][i][1] * 255.0),
RADIUS * 2, RADIUS * 2, 0, 23040);
}
}
gdk_draw_drawable (cd->graph->window, cd->graph->style->black_gc, cd->pixmap,
0, 0, 0, 0, GRAPH_WIDTH + RADIUS * 2, GRAPH_HEIGHT + RADIUS * 2);
}
}
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) 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) 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 = (BenderDialog*) client_data;
if (adjustment->value != cd->rotation)
{
cd->rotation = adjustment->value;
if (cd->preview)
bender_update (cd, UP_PREVIEW | UP_DRAW);
}
}
static void
bender_border_callback (GtkWidget *widget,
gpointer data)
{
BenderDialog *cd;
gimp_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;
gimp_radio_button_update (widget, data);
cd = g_object_get_data (G_OBJECT (widget), "cd");
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;
int i;
cd = (BenderDialog *) client_data;
/* 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,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OPEN, GTK_RESPONSE_OK,
NULL);
gtk_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,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_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;
GdkEventButton *bevent;
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;
/* get the pointer position */
gdk_window_get_pointer (cd->graph->window, &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 (x - (cd->points[cd->outline][i][0] * 255.0)) < distance)
{
distance = abs (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_EXPOSE:
if (cd->pixmap == NULL)
cd->pixmap = gdk_pixmap_new (cd->graph->window,
GRAPH_WIDTH + RADIUS * 2,
GRAPH_HEIGHT + RADIUS * 2, -1);
bender_update (cd, UP_GRAPH | UP_DRAW);
break;
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
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 (cd->graph->window, cursor_type); */
}
break;
default:
break;
}
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,
gint32 layer_id)
{
guchar l_pixel[4];
guchar *l_buf, *l_ptr;
GimpDrawable *l_pv_drawable;
gint l_x, l_y;
gint l_ofx, l_ofy;
t_GDRW l_gdrw;
t_GDRW *gdrw;
l_pv_drawable = gimp_drawable_get (layer_id);
l_ptr = l_buf = g_new (guchar, PREVIEW_BPP * PREVIEW_SIZE_X * PREVIEW_SIZE_Y);
gdrw = &l_gdrw;
p_init_gdrw(gdrw, l_pv_drawable, FALSE, FALSE);
/* offsets to set bend layer to preview center */
l_ofx = (l_pv_drawable->width / 2) - (PREVIEW_SIZE_X / 2);
l_ofy = (l_pv_drawable->height / 2) - (PREVIEW_SIZE_Y / 2);
/* render preview */
for (l_y = 0; l_y < PREVIEW_SIZE_Y; l_y++)
{
for (l_x = 0; l_x < PREVIEW_SIZE_X; l_x++)
{
p_get_pixel(gdrw, l_x + l_ofx, l_y + l_ofy, &l_pixel[0]);
if (cd->color)
{
l_ptr[0] = l_pixel[0];
l_ptr[1] = l_pixel[1];
l_ptr[2] = l_pixel[2];
}
else
{
l_ptr[0] = l_pixel[0];
l_ptr[1] = l_pixel[0];
l_ptr[2] = l_pixel[0];
}
l_ptr[3] = l_pixel[gdrw->index_alpha];
l_ptr += PREVIEW_BPP;
}
}
gimp_preview_area_draw (GIMP_PREVIEW_AREA (cd->pv_widget),
0, 0, PREVIEW_SIZE_X, PREVIEW_SIZE_Y,
GIMP_RGBA_IMAGE,
l_buf,
PREVIEW_BPP * PREVIEW_SIZE_X);
g_free (l_buf);
p_end_gdrw(gdrw);
} /* end p_render_preview */
/* ===================================================== */
/* curve_bend worker procedures */
/* ===================================================== */
static void
p_stretch_curves (BenderDialog *cd,
gint32 xmax,
gint32 ymax)
{
gint32 l_x1, l_x2;
gdouble l_ya, l_yb;
gdouble l_rest;
int l_outline;
for(l_outline = 0; l_outline < 2; l_outline++)
{
for(l_x1 = 0; l_x1 <= xmax; l_x1++)
{
l_x2 = (l_x1 * 255) / xmax;
if((xmax <= 255) && (l_x2 < 255))
{
cd->curve_ptr[l_outline][l_x1] = ROUND((cd->curve[l_outline][l_x2] * ymax) / 255);
}
else
{
/* interpolate */
l_rest = (((gdouble)l_x1 * 255.0) / (gdouble)xmax) - l_x2;
l_ya = cd->curve[l_outline][l_x2]; /* y of this point */
l_yb = cd->curve[l_outline][l_x2 +1]; /* y of next point */
cd->curve_ptr[l_outline][l_x1] = ROUND (((l_ya + ((l_yb -l_ya) * l_rest)) * ymax) / 255);
}
{
int l_debugY;
l_debugY = ROUND((cd->curve[l_outline][l_x2] * 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 inbetween
*/
gdouble l_y1, l_y2;
gdouble delta;
l_y1 = cd->zero2[OUTLINE_UPPER] - cd->curve_ptr[OUTLINE_UPPER][x];
l_y2 = cd->zero2[OUTLINE_LOWER] - cd->curve_ptr[OUTLINE_LOWER][x];
delta = ((double)(l_y2 - l_y1) / (double)(total_steps -1)) * current_step;
return SIGNED_ROUND(l_y1 + delta);
}
static gint32
p_upper_curve_extend (BenderDialog *cd,
gint32 drawable_width,
gint32 drawable_height)
{
gint32 l_y1, l_y2;
l_y1 = cd->max2[OUTLINE_UPPER] - cd->zero2[OUTLINE_UPPER];
l_y2 = (cd->max2[OUTLINE_LOWER] - cd->zero2[OUTLINE_LOWER]) - drawable_height;
return MAX(l_y1, l_y2);
}
static gint32
p_lower_curve_extend (BenderDialog *cd,
gint32 drawable_width,
gint32 drawable_height)
{
gint32 l_y1, l_y2;
l_y1 = cd->zero2[OUTLINE_LOWER] - cd->min2[OUTLINE_LOWER];
l_y2 = (cd->zero2[OUTLINE_UPPER] - cd->min2[OUTLINE_UPPER]) - drawable_height;
return MAX(l_y1, l_y2);
}
static void
p_end_gdrw (t_GDRW *gdrw)
{
gimp_pixel_fetcher_destroy (gdrw->pft);
}
static void
p_init_gdrw (t_GDRW *gdrw,
GimpDrawable *drawable,
int dirty,
int shadow)
{
gdrw->drawable = drawable;
gdrw->pft = gimp_pixel_fetcher_new (drawable, FALSE);
gimp_pixel_fetcher_set_edge_mode (gdrw->pft, GIMP_PIXEL_FETCHER_EDGE_BLACK);
gdrw->tile_width = gimp_tile_width ();
gdrw->tile_height = gimp_tile_height ();
gimp_drawable_mask_bounds (drawable->drawable_id, &gdrw->x1,
&gdrw->y1, &gdrw->x2, &gdrw->y2);
gdrw->bpp = drawable->bpp;
if (gimp_drawable_has_alpha(drawable->drawable_id))
{
/* 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 */
gimp_pixel_fetcher_get_pixel (gdrw->pft, x, y, pixel);
}
static void
p_put_pixel (t_GDRW *gdrw,
gint32 x,
gint32 y,
guchar *pixel)
{
gimp_pixel_fetcher_put_pixel (gdrw->pft, x, y, pixel);
}
void
p_put_mix_pixel (t_GDRW *gdrw,
gint32 x,
gint32 y,
guchar *color,
gint32 nb_curvy,
gint32 nb2_curvy,
gint32 curvy)
{
guchar l_pixel[4];
guchar l_mixmask;
gint l_idx;
gint l_diff;
l_mixmask = 255 - 96;
l_diff = abs(nb_curvy - curvy);
if (l_diff == 0)
{
l_mixmask = 255 - 48;
l_diff = abs(nb2_curvy - curvy);
if (l_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, &l_pixel[0]);
if (l_pixel[gdrw->index_alpha] < 10)
{
/* neighbour is (nearly or full) transparent, do not mix */
p_put_pixel(gdrw, x, y, color);
return;
}
for (l_idx = 0; l_idx < gdrw->index_alpha ; l_idx++)
{
/* mix in left neighbour color */
l_pixel[l_idx] = MIX_CHANNEL(color[l_idx], l_pixel[l_idx], l_mixmask);
}
l_pixel[gdrw->index_alpha] = color[gdrw->index_alpha];
p_put_pixel(gdrw, x, y, &l_pixel[0]);
}
/* ============================================================================
* p_clear_drawable
* ============================================================================
*/
static void
p_clear_drawable (GimpDrawable *drawable)
{
GimpPixelRgn pixel_rgn;
gpointer pr;
guint l_row;
guchar *l_ptr;
gimp_pixel_rgn_init (&pixel_rgn, drawable,
0, 0, drawable->width, drawable->height,
TRUE, /* dirty */
FALSE /* shadow */
);
/* clear the drawable with 0 Bytes (black full-transparent pixels) */
for (pr = gimp_pixel_rgns_register (1, &pixel_rgn);
pr != NULL; pr = gimp_pixel_rgns_process (pr))
{
l_ptr = pixel_rgn.data;
for ( l_row = 0; l_row < pixel_rgn.h; l_row++ )
{
memset(l_ptr, 0, pixel_rgn.w * drawable->bpp);
l_ptr += pixel_rgn.rowstride;
}
}
} /* end p_clear_drawable */
/* ============================================================================
* p_create_pv_image
* ============================================================================
*/
gint32
p_create_pv_image (GimpDrawable *src_drawable,
gint32 *layer_id)
{
gint32 l_new_image_id;
guint l_new_width;
guint l_new_height;
GimpImageType l_type;
guint l_x, l_y;
double l_scale;
guchar l_pixel[4];
GimpDrawable *dst_drawable;
t_GDRW l_src_gdrw;
t_GDRW l_dst_gdrw;
l_new_image_id = gimp_image_new (PREVIEW_SIZE_X, PREVIEW_SIZE_Y,
gimp_image_base_type (gimp_drawable_get_image (src_drawable->drawable_id)));
gimp_image_undo_disable (l_new_image_id);
l_type = gimp_drawable_type(src_drawable->drawable_id);
if (src_drawable->height > src_drawable->width)
{
l_new_height = PV_IMG_HEIGHT;
l_new_width = (src_drawable->width * l_new_height) / src_drawable->height;
l_scale = (float)src_drawable->height / PV_IMG_HEIGHT;
}
else
{
l_new_width = PV_IMG_WIDTH;
l_new_height = (src_drawable->height * l_new_width) / src_drawable->width;
l_scale = (float)src_drawable->width / PV_IMG_WIDTH;
}
*layer_id = gimp_layer_new(l_new_image_id, "preview_original",
l_new_width, l_new_height,
l_type,
100.0, /* opacity */
0); /* mode NORMAL */
if (!gimp_drawable_has_alpha(*layer_id))
{
/* always add alpha channel */
gimp_layer_add_alpha(*layer_id);
}
gimp_image_add_layer(l_new_image_id, *layer_id, 0);
dst_drawable = gimp_drawable_get (*layer_id);
p_init_gdrw(&l_src_gdrw, src_drawable, FALSE, FALSE);
p_init_gdrw(&l_dst_gdrw, dst_drawable, TRUE, FALSE);
for (l_y = 0; l_y < l_new_height; l_y++)
{
for (l_x = 0; l_x < l_new_width; l_x++)
{
p_get_pixel(&l_src_gdrw, l_x * l_scale, l_y * l_scale, &l_pixel[0]);
p_put_pixel(&l_dst_gdrw, l_x, l_y, &l_pixel[0]);
}
}
p_end_gdrw(&l_src_gdrw);
p_end_gdrw(&l_dst_gdrw);
/* gimp_display_new(l_new_image_id); */
return l_new_image_id;
}
/* ============================================================================
* p_add_layer
* ============================================================================
*/
static GimpDrawable*
p_add_layer (gint width,
gint height,
GimpDrawable *src_drawable)
{
GimpImageType l_type;
static GimpDrawable *l_new_drawable;
gint32 l_new_layer_id;
char *l_name;
char *l_name2;
gdouble l_opacity;
GimpLayerModeEffects l_mode;
gint l_visible;
gint32 image_id;
gint stack_position;
image_id = gimp_drawable_get_image (src_drawable->drawable_id);
stack_position = 0; /* TODO: should be same as src_layer */
/* copy type, name, opacity and mode from src_drawable */
l_type = gimp_drawable_type (src_drawable->drawable_id);
l_visible = gimp_drawable_get_visible (src_drawable->drawable_id);
l_name2 = gimp_drawable_get_name (src_drawable->drawable_id);
l_name = g_strdup_printf ("%s_b", l_name2);
g_free (l_name2);
l_mode = gimp_layer_get_mode (src_drawable->drawable_id);
l_opacity = gimp_layer_get_opacity (src_drawable->drawable_id); /* full opacity */
l_new_layer_id = gimp_layer_new (image_id, l_name,
width, height,
l_type,
l_opacity,
l_mode);
g_free (l_name);
if (!gimp_drawable_has_alpha (l_new_layer_id))
{
/* always add alpha channel */
gimp_layer_add_alpha (l_new_layer_id);
}
l_new_drawable = gimp_drawable_get (l_new_layer_id);
if (!l_new_drawable)
{
fprintf (stderr, "p_ad_layer: cant get new_drawable\n");
return NULL;
}
/* add the copied layer to the temp. working image */
gimp_image_add_layer (image_id, l_new_layer_id, stack_position);
/* copy visiblity state */
gimp_drawable_set_visible (l_new_layer_id, l_visible);
return l_new_drawable;
}
/* ============================================================================
* p_bender_calculate_iter_curve
* ============================================================================
*/
void
p_bender_calculate_iter_curve (BenderDialog *cd,
gint32 xmax,
gint32 ymax)
{
int l_x;
gint l_outline;
BenderDialog *cd_from;
BenderDialog *cd_to;
l_outline = cd->outline;
if ((cd->bval_from == NULL) ||
(cd->bval_to == NULL) ||
(cd->bval_curr == NULL))
{
if(gb_debug) 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) 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 (l_x = 0; l_x <= xmax; l_x++)
{
p_delta_gint32 (&cd->curve_ptr[OUTLINE_UPPER][l_x],
cd_from->curve_ptr[OUTLINE_UPPER][l_x],
cd_to->curve_ptr[OUTLINE_UPPER][l_x],
cd->bval_curr->total_steps,
cd->bval_curr->current_step);
p_delta_gint32 (&cd->curve_ptr[OUTLINE_LOWER][l_x],
cd_from->curve_ptr[OUTLINE_LOWER][l_x],
cd_to->curve_ptr[OUTLINE_LOWER][l_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 = l_outline;
}
/* ============================================================================
* p_vertical_bend
* ============================================================================
*/
static void
p_vertical_bend (BenderDialog *cd,
t_GDRW *src_gdrw,
t_GDRW *dst_gdrw)
{
gint32 l_row, l_col;
gint32 l_first_row, l_first_col, l_last_row, l_last_col;
gint32 l_x, l_y;
gint32 l_x2, l_y2;
gint32 l_curvy, l_nb_curvy, l_nb2_curvy;
gint32 l_desty, l_othery;
gint32 l_miny, l_maxy;
gint32 l_sign, l_dy, l_diff;
gint32 l_topshift;
float l_progress_step;
float l_progress_max;
float l_progress;
t_Last *last_arr;
t_Last *first_arr;
guchar color[4];
guchar mixcolor[4];
guchar l_alpha_lo;
gint l_alias_dir;
guchar l_mixmask;
l_topshift = p_upper_curve_extend (cd, src_gdrw->drawable->width,
src_gdrw->drawable->height);
l_diff = l_curvy = l_nb_curvy = l_nb2_curvy= l_miny = l_maxy = 0;
l_alpha_lo = 20;
/* allocate array of last values (one element foreach x koordinate) */
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 (l_x/l_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)
*/
l_first_row = src_gdrw->y1 / src_gdrw->tile_height;
l_last_row = (src_gdrw->y2 / src_gdrw->tile_height);
l_first_col = src_gdrw->x1 / src_gdrw->tile_width;
l_last_col = (src_gdrw->x2 / src_gdrw->tile_width);
/* init progress */
l_progress_max = (1 + l_last_row - l_first_row) * (1 + l_last_col - l_first_col);
l_progress_step = 1.0 / l_progress_max;
l_progress = 0.0;
if (cd->show_progress)
gimp_progress_init ( _("Curve Bend"));
for (l_row = l_first_row; l_row <= l_last_row; l_row++)
{
for (l_col = l_first_col; l_col <= l_last_col; l_col++)
{
if (l_col == l_first_col)
l_x = src_gdrw->x1;
else
l_x = l_col * src_gdrw->tile_width;
if (l_col == l_last_col)
l_x2 = src_gdrw->x2;
else
l_x2 = (l_col +1) * src_gdrw->tile_width;
if (cd->show_progress)
gimp_progress_update (l_progress += l_progress_step);
for( ; l_x < l_x2; l_x++)
{
if (l_row == l_first_row)
l_y = src_gdrw->y1;
else
l_y = l_row * src_gdrw->tile_height;
if(l_row == l_last_row)
l_y2 = src_gdrw->y2;
else
l_y2 = (l_row +1) * src_gdrw->tile_height ;
for( ; l_y < l_y2; l_y++)
{
/* ---------- copy SRC_PIXEL to curve position ------ */
p_get_pixel(src_gdrw, l_x, l_y, color);
l_curvy = p_curve_get_dy(cd, l_x,
(gint32)src_gdrw->drawable->width,
(gint32)src_gdrw->drawable->height, (gdouble)l_y);
l_desty = l_y + l_topshift + l_curvy;
/* ----------- SMOOTING ------------------ */
if (cd->smoothing && (l_x > 0))
{
l_nb_curvy = p_curve_get_dy(cd, l_x -1,
(gint32)src_gdrw->drawable->width,
(gint32)src_gdrw->drawable->height, (gdouble)l_y);
if ((l_nb_curvy == l_curvy) && (l_x > 1))
{
l_nb2_curvy = p_curve_get_dy(cd, l_x -2,
(gint32)src_gdrw->drawable->width,
(gint32)src_gdrw->drawable->height, (gdouble)l_y);
}
else
{
l_nb2_curvy = l_nb_curvy;
}
p_put_mix_pixel(dst_gdrw, l_x, l_desty, color, l_nb_curvy, l_nb2_curvy, l_curvy );
}
else
{
p_put_pixel(dst_gdrw, l_x, l_desty, color);
}
/* ----------- render ANTIALIAS ------------------ */
if(cd->antialias)
{
l_othery = l_desty;
if(l_y == src_gdrw->y1) /* Upper outline */
{
first_arr[l_x].y = l_curvy;
memcpy(first_arr[l_x].color, color,
dst_gdrw->drawable->bpp);
if (l_x > 0)
{
memcpy(mixcolor, first_arr[l_x-1].color,
dst_gdrw->drawable->bpp);
l_diff = abs(first_arr[l_x - 1].y - l_curvy) +1;
l_miny = MIN(first_arr[l_x - 1].y, l_curvy) -1;
l_maxy = MAX(first_arr[l_x - 1].y, l_curvy) +1;
l_othery = (src_gdrw->y2 -1)
+ l_topshift
+ p_curve_get_dy(cd, l_x,
(gint32)src_gdrw->drawable->width,
(gint32)src_gdrw->drawable->height,
(gdouble)(src_gdrw->y2 -1));
}
}
if (l_y == src_gdrw->y2 - 1) /* Lower outline */
{
if (l_x > 0)
{
memcpy(mixcolor, last_arr[l_x-1].color,
dst_gdrw->drawable->bpp);
l_diff = abs(last_arr[l_x - 1].y - l_curvy) +1;
l_maxy = MAX(last_arr[l_x - 1].y, l_curvy) +1;
l_miny = MIN(last_arr[l_x - 1].y, l_curvy) -1;
}
l_othery = (src_gdrw->y1)
+ l_topshift
+ p_curve_get_dy(cd, l_x,
(gint32)src_gdrw->drawable->width,
(gint32)src_gdrw->drawable->height,
(gdouble)(src_gdrw->y1));
}
if(l_desty < l_othery) { l_alias_dir = 1; } /* fade to transp. with descending dy */
else if(l_desty > l_othery) { l_alias_dir = -1; } /* fade to transp. with ascending dy */
else { l_alias_dir = 0; } /* no antialias at curve crossing point(s) */
if (l_alias_dir != 0)
{
l_alpha_lo = 20;
if (gimp_drawable_has_alpha(src_gdrw->drawable->drawable_id))
{
l_alpha_lo = MIN(20, mixcolor[src_gdrw->index_alpha]);
}
for(l_dy = 0; l_dy < l_diff; l_dy++)
{
/* iterate for fading alpha channel */
l_mixmask = 255 * ((gdouble)(l_dy+1) / (gdouble)(l_diff+1));
mixcolor[dst_gdrw->index_alpha] = MIX_CHANNEL(color[dst_gdrw->index_alpha], l_alpha_lo, l_mixmask);
if(l_alias_dir > 0)
{
p_put_pixel(dst_gdrw, l_x -1, l_y + l_topshift + l_miny + l_dy, mixcolor);
}
else
{
p_put_pixel(dst_gdrw, l_x -1, l_y + l_topshift + (l_maxy - l_dy), mixcolor);
}
}
}
}
/* ------------------ FILL HOLES ------------------ */
if (l_y == src_gdrw->y1)
{
l_diff = 0;
l_sign = 1;
}
else
{
l_diff = last_arr[l_x].y - l_curvy;
if (l_diff < 0)
{
l_diff = 0 - l_diff;
l_sign = -1;
}
else
{
l_sign = 1;
}
memcpy(mixcolor, color, dst_gdrw->drawable->bpp);
}
for (l_dy = 1; l_dy <= l_diff; l_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)
{
/* smooting is on, so we are using a mixed color */
gulong alpha1 = last_arr[l_x].color[3];
gulong alpha2 = color[3];
gulong alpha;
l_mixmask = 255 * ((gdouble)(l_dy) / (gdouble)(l_diff+1));
alpha = alpha1 * l_mixmask + alpha2 * (255 - l_mixmask);
mixcolor[3] = alpha/255;
if (mixcolor[3])
{
mixcolor[0] = (alpha1 * l_mixmask * last_arr[l_x].color[0]
+ alpha2 * (255 - l_mixmask) * color[0])/alpha;
mixcolor[1] = (alpha1 * l_mixmask * last_arr[l_x].color[1]
+ alpha2 * (255 - l_mixmask) * color[1])/alpha;
mixcolor[2] = (alpha1 * l_mixmask * last_arr[l_x].color[2]
+ alpha2 * (255 - l_mixmask) * color[2])/alpha;
/*mixcolor[2] = MIX_CHANNEL(last_arr[l_x].color[2], color[2], l_mixmask);*/
}
}
else
{
/* smooting is off, so we are using this color or
the last color */
if (l_dy < l_diff / 2)
{
memcpy(mixcolor, color,
dst_gdrw->drawable->bpp);
}
else
{
memcpy(mixcolor, last_arr[l_x].color,
dst_gdrw->drawable->bpp);
}
}
if (cd->smoothing)
{
p_put_mix_pixel(dst_gdrw, l_x,
l_desty + (l_dy * l_sign),
mixcolor,
l_nb_curvy, l_nb2_curvy, l_curvy );
}
else
{
p_put_pixel(dst_gdrw, l_x,
l_desty + (l_dy * l_sign), mixcolor);
}
}
/* store y and color */
last_arr[l_x].y = l_curvy;
memcpy(last_arr[l_x].color, color, dst_gdrw->drawable->bpp);
}
}
}
}
}
/* ============================================================================
* p_main_bend
* ============================================================================
*/
gint32
p_main_bend (BenderDialog *cd,
GimpDrawable *original_drawable,
gint work_on_copy)
{
t_GDRW l_src_gdrw;
t_GDRW l_dst_gdrw;
GimpDrawable *dst_drawable;
GimpDrawable *src_drawable;
gint32 l_dst_height;
gint32 l_image_id;
gint32 l_tmp_layer_id;
gint32 l_interpolation;
gint l_offset_x, l_offset_y;
gint l_center_x, l_center_y;
gint32 xmax, ymax;
l_interpolation = cd->smoothing;
l_image_id = gimp_drawable_get_image (original_drawable->drawable_id);
gimp_drawable_offsets(original_drawable->drawable_id, &l_offset_x, &l_offset_y);
l_center_x = l_offset_x + (gimp_drawable_width (original_drawable->drawable_id) / 2 );
l_center_y = l_offset_y + (gimp_drawable_height (original_drawable->drawable_id) / 2 );
/* always copy original_drawable to a tmp src_layer */
l_tmp_layer_id = gimp_layer_copy(original_drawable->drawable_id);
/* set layer invisible and dummyname and
* add at top of the image while working
* (for the case of undo the gimp must know,
* that the layer was part of the image)
*/
gimp_image_add_layer (l_image_id, l_tmp_layer_id, 0);
gimp_drawable_set_visible (l_tmp_layer_id, FALSE);
gimp_drawable_set_name (l_tmp_layer_id, "curve_bend_dummylayer");
if(gb_debug) printf("p_main_bend l_tmp_layer_id %d\n", (int)l_tmp_layer_id);
if (cd->rotation != 0.0)
{
if(gb_debug) printf("p_main_bend rotate: %f\n", (float)cd->rotation);
p_gimp_rotate(l_image_id, l_tmp_layer_id, l_interpolation, cd->rotation);
}
src_drawable = gimp_drawable_get (l_tmp_layer_id);
xmax = ymax = src_drawable->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);
l_dst_height = src_drawable->height
+ p_upper_curve_extend(cd, src_drawable->width, src_drawable->height)
+ p_lower_curve_extend(cd, src_drawable->width, src_drawable->height);
if(gb_debug) printf("p_main_bend: l_dst_height:%d\n", (int)l_dst_height);
if(work_on_copy)
{
dst_drawable = p_add_layer(src_drawable->width, l_dst_height, src_drawable);
if(gb_debug) printf("p_main_bend: DONE add layer\n");
}
else
{
/* work on the original */
gimp_layer_resize(original_drawable->drawable_id,
src_drawable->width,
l_dst_height,
l_offset_x, l_offset_y);
if(gb_debug) printf("p_main_bend: DONE layer resize\n");
if(!gimp_drawable_has_alpha(original_drawable->drawable_id))
{
/* always add alpha channel */
gimp_layer_add_alpha(original_drawable->drawable_id);
}
dst_drawable = gimp_drawable_get (original_drawable->drawable_id);
}
p_clear_drawable(dst_drawable);
p_init_gdrw(&l_src_gdrw, src_drawable, FALSE, FALSE);
p_init_gdrw(&l_dst_gdrw, dst_drawable, TRUE, FALSE);
p_vertical_bend(cd, &l_src_gdrw, &l_dst_gdrw);
if(gb_debug) printf("p_main_bend: DONE vertical bend\n");
p_end_gdrw(&l_src_gdrw);
p_end_gdrw(&l_dst_gdrw);
if(cd->rotation != 0.0)
{
p_gimp_rotate (l_image_id, dst_drawable->drawable_id,
l_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)
*/
l_offset_x = l_center_x - (gimp_drawable_width (dst_drawable->drawable_id) / 2 );
l_offset_y = l_center_y - (gimp_drawable_height (dst_drawable->drawable_id) / 2 );
gimp_layer_set_offsets (dst_drawable->drawable_id, l_offset_x, l_offset_y);
/* delete the temp layer */
gimp_image_remove_layer (l_image_id, l_tmp_layer_id);
g_free (cd->curve_ptr[OUTLINE_UPPER]);
g_free (cd->curve_ptr[OUTLINE_LOWER]);
if (gb_debug) printf("p_main_bend: DONE bend main\n");
return dst_drawable->drawable_id;
}
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