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gimp/app/tools/gimpbrushtool.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 <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpbase/gimpbase.h"
#include "tools-types.h"
#include "core/gimp.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "core/gimpimage-pick-color.h"
#include "core/gimptoolinfo.h"
#include "paint/gimppaintcore.h"
#include "paint/gimppaintoptions.h"
#include "widgets/gimpdevices.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpstatusbar.h"
#include "gimpcolorpickeroptions.h"
#include "gimpcolorpickertool.h"
#include "gimppainttool.h"
#include "tool_manager.h"
#include "undo.h"
#include "libgimp/gimpintl.h"
#define TARGET_SIZE 15
#define STATUSBAR_SIZE 128
static void gimp_paint_tool_class_init (GimpPaintToolClass *klass);
static void gimp_paint_tool_init (GimpPaintTool *paint_tool);
static void gimp_paint_tool_finalize (GObject *object);
static void gimp_paint_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *gdisp);
static void gimp_paint_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_paint_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_paint_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_paint_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp);
static void gimp_paint_tool_draw (GimpDrawTool *draw_tool);
static void gimp_paint_tool_sample_color (GimpDrawable *drawable,
gint x,
gint y,
gint state);
static GimpDrawToolClass *parent_class = NULL;
GType
gimp_paint_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpPaintToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_paint_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpPaintTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_paint_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_DRAW_TOOL,
"GimpPaintTool",
&tool_info, 0);
}
return tool_type;
}
static void
gimp_paint_tool_class_init (GimpPaintToolClass *klass)
{
GObjectClass *object_class;
GimpToolClass *tool_class;
GimpDrawToolClass *draw_tool_class;
object_class = G_OBJECT_CLASS (klass);
tool_class = GIMP_TOOL_CLASS (klass);
draw_tool_class = GIMP_DRAW_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_paint_tool_finalize;
tool_class->control = gimp_paint_tool_control;
tool_class->button_press = gimp_paint_tool_button_press;
tool_class->button_release = gimp_paint_tool_button_release;
tool_class->motion = gimp_paint_tool_motion;
tool_class->cursor_update = gimp_paint_tool_cursor_update;
draw_tool_class->draw = gimp_paint_tool_draw;
}
static void
gimp_paint_tool_init (GimpPaintTool *paint_tool)
{
GimpTool *tool;
tool = GIMP_TOOL (paint_tool);
gimp_tool_control_set_motion_mode (tool->control, GIMP_MOTION_MODE_EXACT);
paint_tool->pick_colors = FALSE;
paint_tool->pick_state = FALSE;
}
static void
gimp_paint_tool_finalize (GObject *object)
{
GimpPaintTool *paint_tool;
paint_tool = GIMP_PAINT_TOOL (object);
if (paint_tool->core)
{
g_object_unref (paint_tool->core);
paint_tool->core = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_paint_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *gdisp)
{
GimpPaintTool *paint_tool;
GimpDrawable *drawable;
paint_tool = GIMP_PAINT_TOOL (tool);
drawable = gimp_image_active_drawable (gdisp->gimage);
switch (action)
{
case PAUSE:
break;
case RESUME:
break;
case HALT:
gimp_paint_core_paint (paint_tool->core,
drawable,
GIMP_PAINT_OPTIONS (tool->tool_info->tool_options),
FINISH_PAINT);
gimp_paint_core_cleanup (paint_tool->core);
#if 0
/* evil hack i'm thinking about... --mitch */
{
/* HALT means the current display is going to go away (TM),
* so try to find another display of the same image to make
* straight line drawing continue to work...
*/
GSList *list;
for (list = display_list; list; list = g_slist_next (list))
{
GimpDisplay *tmp_disp;
tmp_disp = (GimpDisplay *) list->data;
if (tmp_disp != gdisp && tmp_disp->gimage == gdisp->gimage)
{
tool->gdisp = tmp_disp;
break;
}
}
}
#endif
break;
default:
break;
}
GIMP_TOOL_CLASS (parent_class)->control (tool, action, gdisp);
}
static void
gimp_paint_tool_button_press (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpDrawTool *draw_tool;
GimpPaintTool *paint_tool;
GimpPaintOptions *paint_options;
GimpPaintCore *core;
GimpBrush *current_brush;
GimpDrawable *drawable;
GimpCoords curr_coords;
gboolean draw_line = FALSE;
draw_tool = GIMP_DRAW_TOOL (tool);
paint_tool = GIMP_PAINT_TOOL (tool);
paint_options = GIMP_PAINT_OPTIONS (tool->tool_info->tool_options);
core = paint_tool->core;
drawable = gimp_image_active_drawable (gdisp->gimage);
curr_coords = *coords;
{
gint off_x, off_y;
gimp_drawable_offsets (drawable, &off_x, &off_y);
curr_coords.x -= off_x;
curr_coords.y -= off_y;
}
if (draw_tool->gdisp)
gimp_draw_tool_stop (draw_tool);
if (tool->gdisp &&
tool->gdisp != gdisp &&
tool->gdisp->gimage == gdisp->gimage)
{
/* if this is a different display, but the same image, HACK around
* in tool internals AFTER stopping the current draw_tool, so
* straight line drawing works across different views of the
* same image.
*/
tool->gdisp = gdisp;
}
if (gimp_devices_get_current (gdisp->gimage->gimp) ==
gdk_device_get_core_pointer ())
{
core->use_pressure = FALSE;
}
else
{
core->use_pressure = TRUE;
}
if (! gimp_paint_core_start (core, drawable, paint_options, &curr_coords))
return;
if ((gdisp != tool->gdisp) || ! (state & GDK_SHIFT_MASK))
{
/* if this is a new image, reinit the core vals */
core->start_coords = core->cur_coords;
core->last_coords = core->cur_coords;
}
else if (state & GDK_SHIFT_MASK)
{
/* If shift is down and this is not the first paint
* stroke, then draw a line from the last coords to the pointer
*/
draw_line = TRUE;
core->start_coords = core->last_coords;
if (state & GDK_CONTROL_MASK)
{
/* Restrict to multiples of 15 degrees if ctrl is pressed */
gimp_paint_core_constrain (core);
}
}
gimp_tool_control_activate (tool->control);
tool->gdisp = gdisp;
/* pause the current selection */
gimp_image_selection_control (gdisp->gimage, GIMP_SELECTION_PAUSE);
/* Let the specific painting function initialize itself */
gimp_paint_core_paint (core, drawable, paint_options, INIT_PAINT);
if (paint_tool->pick_colors &&
! (state & GDK_SHIFT_MASK) &&
(state & (GDK_CONTROL_MASK | GDK_MOD1_MASK)))
{
gimp_paint_tool_sample_color (drawable,
coords->x,
coords->y,
state);
paint_tool->pick_state = TRUE;
gimp_draw_tool_start (draw_tool, gdisp);
return;
}
else
{
paint_tool->pick_state = FALSE;
}
/* store the current brush pointer */
current_brush = core->brush;
if (core->flags & CORE_TRACES_ON_WINDOW)
gimp_paint_core_paint (core, drawable, paint_options, PRETRACE_PAINT);
/* Paint to the image */
if (draw_line)
{
gimp_paint_core_interpolate (core, drawable, paint_options);
core->last_coords = core->cur_coords;
}
else
{
gimp_paint_core_paint (core, drawable, paint_options, MOTION_PAINT);
}
gimp_display_flush_now (gdisp);
if (core->flags & CORE_TRACES_ON_WINDOW)
gimp_paint_core_paint (core, drawable, paint_options, POSTTRACE_PAINT);
/* restore the current brush pointer */
core->brush = current_brush;
}
static void
gimp_paint_tool_button_release (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpPaintTool *paint_tool;
GimpPaintOptions *paint_options;
GimpPaintCore *core;
GimpDrawable *drawable;
paint_tool = GIMP_PAINT_TOOL (tool);
paint_options = GIMP_PAINT_OPTIONS (tool->tool_info->tool_options);
core = paint_tool->core;
drawable = gimp_image_active_drawable (gdisp->gimage);
if (paint_tool->pick_state)
{
gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));
paint_tool->pick_state = FALSE;
}
/* Let the specific painting function finish up */
gimp_paint_core_paint (core, drawable, paint_options, FINISH_PAINT);
/* resume the current selection */
gimp_image_selection_control (gdisp->gimage, GIMP_SELECTION_RESUME);
/* Set tool state to inactive -- no longer painting */
gimp_tool_control_halt (tool->control);
gimp_paint_core_finish (core, drawable);
gimp_image_flush (gdisp->gimage);
}
static void
gimp_paint_tool_motion (GimpTool *tool,
GimpCoords *coords,
guint32 time,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpPaintTool *paint_tool;
GimpPaintOptions *paint_options;
GimpPaintCore *core;
GimpDrawable *drawable;
paint_tool = GIMP_PAINT_TOOL (tool);
paint_options = GIMP_PAINT_OPTIONS (tool->tool_info->tool_options);
core = paint_tool->core;
drawable = gimp_image_active_drawable (gdisp->gimage);
if (paint_tool->pick_state)
{
gimp_draw_tool_pause (GIMP_DRAW_TOOL (paint_tool));
}
core->cur_coords = *coords;
{
gint off_x, off_y;
gimp_drawable_offsets (drawable, &off_x, &off_y);
core->cur_coords.x -= off_x;
core->cur_coords.y -= off_y;
}
if (paint_tool->pick_state)
{
gimp_paint_tool_sample_color (drawable,
coords->x,
coords->y,
state);
gimp_draw_tool_resume (GIMP_DRAW_TOOL (paint_tool));
return;
}
if (core->flags & CORE_TRACES_ON_WINDOW)
gimp_paint_core_paint (core, drawable, paint_options, PRETRACE_PAINT);
gimp_paint_core_interpolate (core, drawable, paint_options);
gimp_display_flush_now (gdisp);
if (core->flags & CORE_TRACES_ON_WINDOW)
gimp_paint_core_paint (core, drawable, paint_options, POSTTRACE_PAINT);
core->last_coords = core->cur_coords;
}
static void
gimp_paint_tool_cursor_update (GimpTool *tool,
GimpCoords *coords,
GdkModifierType state,
GimpDisplay *gdisp)
{
GimpPaintTool *paint_tool;
GimpDrawTool *draw_tool;
GimpPaintCore *core;
GimpDisplayShell *shell;
GimpLayer *layer;
paint_tool = GIMP_PAINT_TOOL (tool);
draw_tool = GIMP_DRAW_TOOL (tool);
core = paint_tool->core;
shell = GIMP_DISPLAY_SHELL (gdisp->shell);
/* undraw the old line (if any) */
if (draw_tool->gdisp)
gimp_draw_tool_stop (draw_tool);
gimp_statusbar_pop (GIMP_STATUSBAR (shell->statusbar),
g_type_name (G_TYPE_FROM_INSTANCE (tool)));
if (tool->gdisp &&
tool->gdisp != gdisp &&
tool->gdisp->gimage == gdisp->gimage)
{
/* if this is a different display, but the same image, HACK around
* in tool internals AFTER stopping the current draw_tool, so
* straight line drawing works across different views of the
* same image.
*/
tool->gdisp = gdisp;
}
if ((layer = gimp_image_get_active_layer (gdisp->gimage)))
{
if (gdisp == tool->gdisp && (state & GDK_SHIFT_MASK))
{
/* If shift is down and this is not the first paint stroke,
* draw a line
*/
gdouble dx, dy, dist;
gchar status_str[STATUSBAR_SIZE];
core->cur_coords = *coords;
{
gint off_x, off_y;
gimp_drawable_offsets (GIMP_DRAWABLE (layer), &off_x, &off_y);
core->cur_coords.x -= off_x;
core->cur_coords.y -= off_y;
}
if (state & GDK_CONTROL_MASK)
{
/* Restrict to multiples of 15 degrees if ctrl is pressed */
gimp_paint_core_constrain (core);
}
dx = core->cur_coords.x - core->last_coords.x;
dy = core->cur_coords.y - core->last_coords.y;
/* show distance in statusbar */
if (shell->dot_for_dot)
{
dist = sqrt (SQR (dx) + SQR (dy));
g_snprintf (status_str, sizeof (status_str), "%.1f %s",
dist, _("pixels"));
}
else
{
gchar format_str[64];
g_snprintf (format_str, sizeof (format_str), "%%.%df %s",
gimp_unit_get_digits (gdisp->gimage->unit),
gimp_unit_get_symbol (gdisp->gimage->unit));
dist = (gimp_unit_get_factor (gdisp->gimage->unit) *
sqrt (SQR (dx / gdisp->gimage->xresolution) +
SQR (dy / gdisp->gimage->yresolution)));
g_snprintf (status_str, sizeof (status_str), format_str,
dist);
}
gimp_statusbar_push (GIMP_STATUSBAR (shell->statusbar),
g_type_name (G_TYPE_FROM_INSTANCE (tool)),
status_str);
gimp_draw_tool_start (draw_tool, gdisp);
}
else if (paint_tool->pick_colors &&
! (state & GDK_SHIFT_MASK) &&
(state & (GDK_CONTROL_MASK | GDK_MOD1_MASK)))
{
/* If Ctrl or Mod1 is pressed, pick colors */
gimp_tool_set_cursor (tool, gdisp,
GIMP_COLOR_PICKER_CURSOR,
GIMP_COLOR_PICKER_TOOL_CURSOR,
GIMP_CURSOR_MODIFIER_NONE);
return;
}
}
GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, gdisp);
}
static void
gimp_paint_tool_draw (GimpDrawTool *draw_tool)
{
GimpPaintTool *paint_tool;
GimpPaintCore *core;
paint_tool = GIMP_PAINT_TOOL (draw_tool);
core = paint_tool->core;
if (paint_tool->pick_state)
{
GimpToolInfo *info;
GimpColorPickerOptions *options;
info = tool_manager_get_info_by_type (GIMP_TOOL (draw_tool)->tool_info->gimp,
GIMP_TYPE_COLOR_PICKER_TOOL);
options = GIMP_COLOR_PICKER_OPTIONS (info->tool_options);
if (options->sample_average)
{
gimp_draw_tool_draw_rectangle (draw_tool,
FALSE,
(core->cur_coords.x -
options->average_radius),
(core->cur_coords.y -
options->average_radius),
2 * options->average_radius + 1,
2 * options->average_radius + 1,
TRUE);
}
}
else
{
/* Draw start target */
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_CROSS,
floor (core->last_coords.x) + 0.5,
floor (core->last_coords.y) + 0.5,
TARGET_SIZE,
TARGET_SIZE,
GTK_ANCHOR_CENTER,
TRUE);
/* Draw end target */
gimp_draw_tool_draw_handle (draw_tool,
GIMP_HANDLE_CROSS,
floor (core->cur_coords.x) + 0.5,
floor (core->cur_coords.y) + 0.5,
TARGET_SIZE,
TARGET_SIZE,
GTK_ANCHOR_CENTER,
TRUE);
/* Draw the line between the start and end coords */
gimp_draw_tool_draw_line (draw_tool,
floor (core->last_coords.x) + 0.5,
floor (core->last_coords.y) + 0.5,
floor (core->cur_coords.x) + 0.5,
floor (core->cur_coords.y) + 0.5,
TRUE);
}
}
static void
gimp_paint_tool_sample_color (GimpDrawable *drawable,
gint x,
gint y,
gint state)
{
GimpToolInfo *picker_info;
GimpColorPickerOptions *picker_options;
GimpImage *gimage;
GimpRGB color;
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
picker_info = tool_manager_get_info_by_type (gimage->gimp,
GIMP_TYPE_COLOR_PICKER_TOOL);
picker_options = GIMP_COLOR_PICKER_OPTIONS (picker_info->tool_options);
if (gimp_image_pick_color (gimage,
drawable,
picker_options->sample_merged,
x, y,
picker_options->sample_average,
picker_options->average_radius,
&color,
NULL,
NULL))
{
if ((state & GDK_CONTROL_MASK))
gimp_context_set_foreground (gimp_get_user_context (gimage->gimp),
&color);
else
gimp_context_set_background (gimp_get_user_context (gimage->gimp),
&color);
}
}
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