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gimp/app/paint/gimpairbrush.c

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/* 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.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "base/temp-buf.h"
#include "paint-funcs/paint-funcs.h"
#include "core/gimp.h"
#include "core/gimpbrush.h"
#include "core/gimpcontext.h"
#include "core/gimpdrawable.h"
#include "core/gimpgradient.h"
#include "core/gimpimage.h"
#include "core/gimptoolinfo.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplay-foreach.h"
#include "gimpairbrushtool.h"
#include "paint_options.h"
#include "gimptool.h"
#include "tool_manager.h"
#include "libgimp/gimpintl.h"
/* The maximum amount of pressure that can be exerted */
#define MAX_PRESSURE 0.075
/* Default pressure setting */
#define AIRBRUSH_DEFAULT_RATE 0.0
#define AIRBRUSH_DEFAULT_PRESSURE 10.0
#define AIRBRUSH_DEFAULT_INCREMENTAL FALSE
#define OFF 0
#define ON 1
/* the airbrush structures */
typedef struct _AirbrushTimeout AirbrushTimeout;
struct _AirbrushTimeout
{
GimpPaintTool *paint_tool;
GimpDrawable *drawable;
};
typedef struct _AirbrushOptions AirbrushOptions;
struct _AirbrushOptions
{
PaintOptions paint_options;
gdouble rate;
gdouble rate_d;
GtkObject *rate_w;
gdouble pressure;
gdouble pressure_d;
GtkObject *pressure_w;
};
/* local function prototypes */
static void gimp_airbrush_tool_class_init (GimpAirbrushToolClass *klass);
static void gimp_airbrush_tool_init (GimpAirbrushTool *airbrush);
static void gimp_airbrush_tool_finalize (GObject *object);
static void gimp_airbrush_tool_paint (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintState state);
static void gimp_airbrush_tool_motion (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintPressureOptions *pressure_options,
gdouble pressure,
gboolean incremental);
static gint airbrush_time_out (gpointer data);
static GimpToolOptions * airbrush_options_new (GimpToolInfo *tool_info);
static void airbrush_options_reset (GimpToolOptions *tool_options);
/* local variables */
static gint timer; /* timer for successive paint applications */
static gint timer_state = OFF; /* state of airbrush tool */
static AirbrushTimeout airbrush_timeout;
static gdouble non_gui_rate;
static gdouble non_gui_pressure;
static gboolean non_gui_incremental;
static GimpPaintToolClass *parent_class = NULL;
/* functions */
void
gimp_airbrush_tool_register (Gimp *gimp,
GimpToolRegisterCallback callback)
{
(* callback) (gimp,
GIMP_TYPE_AIRBRUSH_TOOL,
airbrush_options_new,
TRUE,
"gimp:airbrush_tool",
_("Airbrush"),
_("Airbrush with variable pressure"),
N_("/Tools/Paint Tools/Airbrush"), "A",
NULL, "tools/airbrush.html",
GIMP_STOCK_TOOL_AIRBRUSH);
}
GType
gimp_airbrush_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpAirbrushToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_airbrush_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpAirbrushTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_airbrush_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_PAINT_TOOL,
"GimpAirbrushTool",
&tool_info, 0);
}
return tool_type;
}
static void
gimp_airbrush_tool_class_init (GimpAirbrushToolClass *klass)
{
GObjectClass *object_class;
GimpPaintToolClass *paint_tool_class;
object_class = G_OBJECT_CLASS (klass);
paint_tool_class = GIMP_PAINT_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_airbrush_tool_finalize;
paint_tool_class->paint = gimp_airbrush_tool_paint;
}
static void
gimp_airbrush_tool_init (GimpAirbrushTool *airbrush)
{
GimpTool *tool;
GimpPaintTool *paint_tool;
tool = GIMP_TOOL (airbrush);
paint_tool = GIMP_PAINT_TOOL (airbrush);
tool->tool_cursor = GIMP_AIRBRUSH_TOOL_CURSOR;
paint_tool->pick_colors = TRUE;
paint_tool->flags |= TOOL_CAN_HANDLE_CHANGING_BRUSH;
}
static void
gimp_airbrush_tool_finalize (GObject *object)
{
if (timer_state == ON)
{
gtk_timeout_remove (timer);
timer_state = OFF;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_airbrush_tool_paint (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintState state)
{
AirbrushOptions *options;
PaintPressureOptions *pressure_options;
gdouble pressure;
gdouble rate;
gboolean incremental;
GimpBrush *brush;
if (! drawable)
return;
options = (AirbrushOptions *) GIMP_TOOL (paint_tool)->tool_info->tool_options;
if (options)
{
pressure_options = options->paint_options.pressure_options;
pressure = options->pressure;
rate = options->rate;
incremental = options->paint_options.incremental;
}
else
{
pressure_options = &non_gui_pressure_options;
pressure = non_gui_pressure;
rate = non_gui_rate;
incremental = non_gui_incremental;
}
brush =
gimp_context_get_brush (gimp_get_current_context (drawable->gimage->gimp));
switch (state)
{
case INIT_PAINT:
if (timer_state == ON)
{
g_warning ("killing stray timer, please report to lewing@gimp.org");
gtk_timeout_remove (timer);
timer_state = OFF;
}
break;
case MOTION_PAINT:
if (timer_state == ON)
{
gtk_timeout_remove (timer);
timer_state = OFF;
}
gimp_airbrush_tool_motion (paint_tool,
drawable,
pressure_options,
pressure,
incremental);
if (rate != 0.0)
{
gdouble timeout;
airbrush_timeout.paint_tool = paint_tool;
airbrush_timeout.drawable = drawable;
timeout = (pressure_options->rate ?
(10000 / (rate * 2.0 * paint_tool->cur_coords.pressure)) :
(10000 / rate));
timer = gtk_timeout_add (timeout, airbrush_time_out, paint_tool);
timer_state = ON;
}
break;
case FINISH_PAINT:
if (timer_state == ON)
{
gtk_timeout_remove (timer);
timer_state = OFF;
}
break;
default:
break;
}
}
static gint
airbrush_time_out (gpointer client_data)
{
GimpTool *tool;
AirbrushOptions *options;
PaintPressureOptions *pressure_options;
gdouble pressure;
gdouble rate;
gboolean incremental;
tool = GIMP_TOOL (client_data);
options = (AirbrushOptions *) tool->tool_info->tool_options;
if (options)
{
pressure_options = options->paint_options.pressure_options;
pressure = options->pressure;
rate = options->rate;
incremental = options->paint_options.incremental;
}
else
{
pressure_options = &non_gui_pressure_options;
pressure = non_gui_pressure;
rate = non_gui_rate;
incremental = non_gui_incremental;
}
gimp_airbrush_tool_motion (airbrush_timeout.paint_tool,
airbrush_timeout.drawable,
pressure_options,
pressure,
incremental);
gdisplays_flush ();
/* restart the timer */
if (rate != 0.0)
{
if (pressure_options->rate)
{
/* set a new timer */
timer = gtk_timeout_add ((10000 / (rate * 2.0 * airbrush_timeout.paint_tool->cur_coords.pressure)),
airbrush_time_out, NULL);
return FALSE;
}
return TRUE;
}
return FALSE;
}
static void
gimp_airbrush_tool_motion (GimpPaintTool *paint_tool,
GimpDrawable *drawable,
PaintPressureOptions *pressure_options,
gdouble pressure,
gboolean incremental)
{
GimpImage *gimage;
GimpContext *context;
TempBuf *area;
guchar col[MAX_CHANNELS];
gdouble scale;
PaintApplicationMode paint_appl_mode = incremental ? INCREMENTAL : CONSTANT;
if (!drawable)
return;
if (! (gimage = gimp_drawable_gimage (drawable)))
return;
context = gimp_get_current_context (gimage->gimp);
if (pressure_options->size)
scale = paint_tool->cur_coords.pressure;
else
scale = 1.0;
if (! (area = gimp_paint_tool_get_paint_area (paint_tool, drawable, scale)))
return;
/* color the pixels */
if (pressure_options->color)
{
GimpRGB color;
gimp_gradient_get_color_at (gimp_context_get_gradient (context),
paint_tool->cur_coords.pressure, &color);
gimp_rgba_get_uchar (&color,
&col[RED_PIX],
&col[GREEN_PIX],
&col[BLUE_PIX],
&col[ALPHA_PIX]);
paint_appl_mode = INCREMENTAL;
color_pixels (temp_buf_data (area), col,
area->width * area->height, area->bytes);
}
else if (paint_tool->brush && paint_tool->brush->pixmap)
{
paint_appl_mode = INCREMENTAL;
gimp_paint_tool_color_area_with_pixmap (paint_tool, gimage,
drawable, area,
scale, SOFT);
}
else
{
gimp_image_get_foreground (gimage, drawable, col);
col[area->bytes - 1] = OPAQUE_OPACITY;
color_pixels (temp_buf_data (area), col,
area->width * area->height, area->bytes);
}
if (pressure_options->pressure)
pressure = pressure * 2.0 * paint_tool->cur_coords.pressure;
/* paste the newly painted area to the image */
gimp_paint_tool_paste_canvas (paint_tool, drawable,
MIN (pressure, 255),
(gint) (gimp_context_get_opacity (context) * 255),
gimp_context_get_paint_mode (gimp_get_current_context (gimage->gimp)),
SOFT, scale, paint_appl_mode);
}
gboolean
airbrush_non_gui_default (GimpDrawable *drawable,
gint num_strokes,
gdouble *stroke_array)
{
GimpToolInfo *tool_info;
AirbrushOptions *options;
gdouble pressure = AIRBRUSH_DEFAULT_PRESSURE;
tool_info = tool_manager_get_info_by_type (drawable->gimage->gimp,
GIMP_TYPE_AIRBRUSH_TOOL);
options = (AirbrushOptions *) tool_info->tool_options;
if (options)
pressure = options->pressure;
return airbrush_non_gui (drawable, pressure, num_strokes, stroke_array);
}
gboolean
airbrush_non_gui (GimpDrawable *drawable,
gdouble pressure,
gint num_strokes,
gdouble *stroke_array)
{
static GimpAirbrushTool *non_gui_airbrush = NULL;
GimpPaintTool *paint_tool;
gint i;
if (! non_gui_airbrush)
{
non_gui_airbrush = g_object_new (GIMP_TYPE_AIRBRUSH_TOOL, NULL);
}
paint_tool = GIMP_PAINT_TOOL (non_gui_airbrush);
if (gimp_paint_tool_start (paint_tool, drawable,
stroke_array[0],
stroke_array[1]))
{
non_gui_rate = AIRBRUSH_DEFAULT_RATE;
non_gui_pressure = pressure;
non_gui_incremental = AIRBRUSH_DEFAULT_INCREMENTAL;
paint_tool->start_coords.x = paint_tool->last_coords.x = stroke_array[0];
paint_tool->start_coords.y = paint_tool->last_coords.y = stroke_array[1];
gimp_airbrush_tool_paint (paint_tool, drawable, MOTION_PAINT);
for (i = 1; i < num_strokes; i++)
{
paint_tool->cur_coords.x = stroke_array[i * 2 + 0];
paint_tool->cur_coords.y = stroke_array[i * 2 + 1];
gimp_paint_tool_interpolate (paint_tool, drawable);
paint_tool->last_coords.x = paint_tool->cur_coords.x;
paint_tool->last_coords.y = paint_tool->cur_coords.y;
}
gimp_paint_tool_finish (paint_tool, drawable);
return TRUE;
}
return FALSE;
}
static GimpToolOptions *
airbrush_options_new (GimpToolInfo *tool_info)
{
AirbrushOptions *options;
GtkWidget *vbox;
GtkWidget *table;
GtkWidget *scale;
options = g_new0 (AirbrushOptions, 1);
paint_options_init ((PaintOptions *) options, tool_info);
((GimpToolOptions *) options)->reset_func = airbrush_options_reset;
options->rate = options->rate_d = 80.0;
options->pressure = options->pressure_d = AIRBRUSH_DEFAULT_PRESSURE;
/* the main vbox */
vbox = ((GimpToolOptions *) options)->main_vbox;
/* the rate scale */
table = gtk_table_new (2, 2, FALSE);
gtk_table_set_col_spacing (GTK_TABLE (table), 0, 4);
gtk_table_set_row_spacings (GTK_TABLE (table), 1);
gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
options->rate_w =
gtk_adjustment_new (options->rate_d, 0.0, 150.0, 1.0, 1.0, 0.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (options->rate_w));
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
g_signal_connect (G_OBJECT (options->rate_w), "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&options->rate);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
_("Rate:"), 1.0, 1.0,
scale, 1, FALSE);
/* the pressure scale */
options->pressure_w =
gtk_adjustment_new (options->pressure_d, 0.0, 100.0, 1.0, 1.0, 0.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (options->pressure_w));
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
g_signal_connect (G_OBJECT (options->pressure_w), "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&options->pressure);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
_("Pressure:"), 1.0, 1.0,
scale, 1, FALSE);
gtk_widget_show (table);
return (GimpToolOptions *) options;
}
static void
airbrush_options_reset (GimpToolOptions *tool_options)
{
AirbrushOptions *options;
options = (AirbrushOptions *) tool_options;
paint_options_reset (tool_options);
gtk_adjustment_set_value (GTK_ADJUSTMENT (options->rate_w),
options->rate_d);
gtk_adjustment_set_value (GTK_ADJUSTMENT (options->pressure_w),
options->pressure_d);
}
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