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gimp/app/gimpbrushpipe.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* Copyright (C) 1999 Adrian Likins and Tor Lillqvist
*
* 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.
*/
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#ifndef _O_BINARY
#define _O_BINARY 0
#endif
#include <gtk/gtk.h>
#ifdef G_OS_WIN32
#include <io.h>
#endif
#include "libgimpmath/gimpmath.h"
#include "apptypes.h"
#include "appenv.h"
#include "brush_header.h"
#include "pattern_header.h"
#include "patterns.h"
#include "gimpbrush.h"
#include "gimpbrushpipe.h"
#include "gimprc.h"
/* this needs to go away */
#include "tools/paint_core.h"
#include "libgimp/gimpparasiteio.h"
#include "libgimp/gimpintl.h"
static GimpBrush * gimp_brush_pipe_select_brush (PaintCore *paint_core);
static gboolean gimp_brush_pipe_want_null_motion (PaintCore *paint_core);
static void gimp_brush_pipe_destroy (GtkObject *object);
static GimpBrushClass *parent_class = NULL;
static GimpBrush *
gimp_brush_pipe_select_brush (PaintCore *paint_core)
{
GimpBrushPipe *pipe;
gint i, brushix, ix;
gdouble angle;
g_return_val_if_fail (paint_core != NULL, NULL);
g_return_val_if_fail (GIMP_IS_BRUSH_PIPE (paint_core->brush), NULL);
pipe = GIMP_BRUSH_PIPE (paint_core->brush);
if (pipe->nbrushes == 1)
return GIMP_BRUSH (pipe->current);
brushix = 0;
for (i = 0; i < pipe->dimension; i++)
{
switch (pipe->select[i])
{
case PIPE_SELECT_INCREMENTAL:
ix = (pipe->index[i] + 1) % pipe->rank[i];
break;
case PIPE_SELECT_ANGULAR:
angle = atan2 (paint_core->cury - paint_core->lasty,
paint_core->curx - paint_core->lastx);
/* Offset angle to be compatible with PSP tubes */
angle += G_PI_2;
/* Map it to the [0..2*G_PI) interval */
if (angle < 0)
angle += 2.0 * G_PI;
else if (angle > 2.0 * G_PI)
angle -= 2.0 * G_PI;
ix = RINT (angle / (2.0 * G_PI) * pipe->rank[i]);
break;
case PIPE_SELECT_RANDOM:
/* This probably isn't the right way */
ix = rand () % pipe->rank[i];
break;
case PIPE_SELECT_PRESSURE:
ix = RINT (paint_core->curpressure * (pipe->rank[i] - 1));
break;
case PIPE_SELECT_TILT_X:
ix = RINT (paint_core->curxtilt / 2.0 * pipe->rank[i]) + pipe->rank[i]/2;
break;
case PIPE_SELECT_TILT_Y:
ix = RINT (paint_core->curytilt / 2.0 * pipe->rank[i]) + pipe->rank[i]/2;
break;
case PIPE_SELECT_CONSTANT:
default:
ix = pipe->index[i];
break;
}
pipe->index[i] = CLAMP (ix, 0, pipe->rank[i]-1);
brushix += pipe->stride[i] * pipe->index[i];
}
/* Make sure is inside bounds */
brushix = CLAMP (brushix, 0, pipe->nbrushes-1);
pipe->current = pipe->brushes[brushix];
return GIMP_BRUSH (pipe->current);
}
static gboolean
gimp_brush_pipe_want_null_motion (PaintCore *paint_core)
{
GimpBrushPipe *pipe;
gint i;
g_return_val_if_fail (paint_core != NULL, TRUE);
g_return_val_if_fail (GIMP_IS_BRUSH_PIPE (paint_core->brush), TRUE);
pipe = GIMP_BRUSH_PIPE (paint_core->brush);
if (pipe->nbrushes == 1)
return TRUE;
for (i = 0; i < pipe->dimension; i++)
if (pipe->select[i] == PIPE_SELECT_ANGULAR)
return FALSE;
return TRUE;
}
static void
gimp_brush_pipe_destroy (GtkObject *object)
{
GimpBrushPipe *pipe;
gint i;
g_return_if_fail (object != NULL);
g_return_if_fail (GIMP_IS_BRUSH_PIPE (object));
pipe = GIMP_BRUSH_PIPE (object);
g_free (pipe->rank);
g_free (pipe->stride);
for (i = 1; i < pipe->nbrushes; i++)
if (pipe->brushes[i])
gtk_object_unref (GTK_OBJECT (pipe->brushes[i]));
g_free (pipe->brushes);
g_free (pipe->select);
g_free (pipe->index);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static void
gimp_brush_pipe_class_init (GimpBrushPipeClass *klass)
{
GtkObjectClass *object_class;
GimpBrushClass *brush_class;
object_class = (GtkObjectClass *) klass;
brush_class = (GimpBrushClass *) klass;
parent_class = gtk_type_class (GIMP_TYPE_BRUSH);
brush_class->select_brush = gimp_brush_pipe_select_brush;
brush_class->want_null_motion = gimp_brush_pipe_want_null_motion;
object_class->destroy = gimp_brush_pipe_destroy;
}
void
gimp_brush_pipe_init (GimpBrushPipe *pipe)
{
pipe->current = NULL;
pipe->dimension = 0;
pipe->rank = NULL;
pipe->stride = NULL;
pipe->nbrushes = 0;
pipe->brushes = NULL;
pipe->select = NULL;
pipe->index = NULL;
}
GtkType
gimp_brush_pipe_get_type (void)
{
static GtkType type = 0;
if (!type)
{
GtkTypeInfo info =
{
"GimpBrushPipe",
sizeof (GimpBrushPipe),
sizeof (GimpBrushPipeClass),
(GtkClassInitFunc) gimp_brush_pipe_class_init,
(GtkObjectInitFunc) gimp_brush_pipe_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL
};
type = gtk_type_unique (GIMP_TYPE_BRUSH, &info);
}
return type;
}
GimpBrush *
gimp_brush_pipe_load (const gchar *filename)
{
GimpBrushPipe *pipe = NULL;
GimpPixPipeParams params;
gint i;
gint num_of_brushes = 0;
gint totalcells;
gchar *paramstring;
GString *buffer;
gchar c;
gint fd;
g_return_val_if_fail (filename != NULL, NULL);
fd = open (filename, O_RDONLY | _O_BINARY);
if (fd == -1)
{
g_message ("Couldn't open file '%s'", filename);
return NULL;
}
/* The file format starts with a painfully simple text header */
/* get the name */
buffer = g_string_new (NULL);
while (read (fd, &c, 1) == 1 && c != '\n' && buffer->len < 1024)
g_string_append_c (buffer, c);
if (buffer->len > 0 && buffer->len < 1024)
{
pipe = GIMP_BRUSH_PIPE (gtk_type_new (GIMP_TYPE_BRUSH_PIPE));
gimp_object_set_name (GIMP_OBJECT (pipe), buffer->str);
}
g_string_free (buffer, TRUE);
if (!pipe)
{
g_message ("Couldn't read name for brush pipe from file '%s'\n",
filename);
close (fd);
return NULL;
}
/* get the number of brushes */
buffer = g_string_new (NULL);
while (read (fd, &c, 1) == 1 && c != '\n' && buffer->len < 1024)
g_string_append_c (buffer, c);
if (buffer->len > 0 && buffer->len < 1024)
{
num_of_brushes = strtol (buffer->str, &paramstring, 10);
}
if (num_of_brushes < 1)
{
g_message (_("Brush pipes should have at least one brush:\n\"%s\""),
filename);
close (fd);
gtk_object_sink (GTK_OBJECT (pipe));
g_string_free (buffer, TRUE);
return NULL;
}
while (*paramstring && isspace (*paramstring))
paramstring++;
if (*paramstring)
{
gimp_pixpipe_params_init (&params);
gimp_pixpipe_params_parse (paramstring, &params);
pipe->dimension = params.dim;
pipe->rank = g_new0 (gint, pipe->dimension);
pipe->select = g_new0 (PipeSelectModes, pipe->dimension);
pipe->index = g_new0 (gint, pipe->dimension);
/* placement is not used at all ?? */
if (params.free_placement_string)
g_free (params.placement);
for (i = 0; i < pipe->dimension; i++)
{
pipe->rank[i] = params.rank[i];
if (strcmp (params.selection[i], "incremental") == 0)
pipe->select[i] = PIPE_SELECT_INCREMENTAL;
else if (strcmp (params.selection[i], "angular") == 0)
pipe->select[i] = PIPE_SELECT_ANGULAR;
else if (strcmp (params.selection[i], "velocity") == 0)
pipe->select[i] = PIPE_SELECT_VELOCITY;
else if (strcmp (params.selection[i], "random") == 0)
pipe->select[i] = PIPE_SELECT_RANDOM;
else if (strcmp (params.selection[i], "pressure") == 0)
pipe->select[i] = PIPE_SELECT_PRESSURE;
else if (strcmp (params.selection[i], "xtilt") == 0)
pipe->select[i] = PIPE_SELECT_TILT_X;
else if (strcmp (params.selection[i], "ytilt") == 0)
pipe->select[i] = PIPE_SELECT_TILT_Y;
else
pipe->select[i] = PIPE_SELECT_CONSTANT;
if (params.free_selection_string)
g_free (params.selection[i]);
pipe->index[i] = 0;
}
}
else
{
pipe->dimension = 1;
pipe->rank = g_new (gint, 1);
pipe->rank[0] = num_of_brushes;
pipe->select = g_new (PipeSelectModes, 1);
pipe->select[0] = PIPE_SELECT_INCREMENTAL;
pipe->index = g_new (gint, 1);
pipe->index[0] = 0;
}
g_string_free (buffer, TRUE);
totalcells = 1; /* Not all necessarily present, maybe */
for (i = 0; i < pipe->dimension; i++)
totalcells *= pipe->rank[i];
pipe->stride = g_new0 (gint, pipe->dimension);
for (i = 0; i < pipe->dimension; i++)
{
if (i == 0)
pipe->stride[i] = totalcells / pipe->rank[i];
else
pipe->stride[i] = pipe->stride[i-1] / pipe->rank[i];
}
g_assert (pipe->stride[pipe->dimension-1] == 1);
pipe->brushes = g_new0 (GimpBrush *, num_of_brushes);
while (pipe->nbrushes < num_of_brushes)
{
pipe->brushes[pipe->nbrushes] = gimp_brush_load_brush (fd, filename);
if (pipe->brushes[pipe->nbrushes])
{
gtk_object_ref (GTK_OBJECT (pipe->brushes[pipe->nbrushes]));
gtk_object_sink (GTK_OBJECT (pipe->brushes[pipe->nbrushes]));
gimp_object_set_name (GIMP_OBJECT (pipe->brushes[pipe->nbrushes]),
NULL);
}
else
{
g_message (_("Failed to load one of the brushes in the brush pipe\n\"%s\""),
filename);
close (fd);
gtk_object_sink (GTK_OBJECT (pipe));
return NULL;
}
pipe->nbrushes++;
}
/* Current brush is the first one. */
pipe->current = pipe->brushes[0];
/* just to satisfy the code that relies on this crap */
GIMP_BRUSH (pipe)->filename = g_strdup (filename);
GIMP_BRUSH (pipe)->spacing = pipe->current->spacing;
GIMP_BRUSH (pipe)->x_axis = pipe->current->x_axis;
GIMP_BRUSH (pipe)->y_axis = pipe->current->y_axis;
GIMP_BRUSH (pipe)->mask = pipe->current->mask;
GIMP_BRUSH (pipe)->pixmap = pipe->current->pixmap;
close (fd);
return GIMP_BRUSH (pipe);
}
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