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gimp/app/tools/gimpdrawtool.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
*
* 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 "libgimpmath/gimpmath.h"
#include "tools-types.h"
#include "base/boundary.h"
#include "core/gimpimage.h"
#include "core/gimplist.h"
#include "vectors/gimpanchor.h"
#include "vectors/gimpstroke.h"
#include "vectors/gimpvectors.h"
#include "display/gimpcanvas.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-transform.h"
#include "gimpdrawtool.h"
static void gimp_draw_tool_finalize (GObject *object);
static gboolean gimp_draw_tool_has_display (GimpTool *tool,
GimpDisplay *display);
static GimpDisplay * gimp_draw_tool_has_image (GimpTool *tool,
GimpImage *image);
static void gimp_draw_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display);
static void gimp_draw_tool_draw (GimpDrawTool *draw_tool);
static void gimp_draw_tool_real_draw (GimpDrawTool *draw_tool);
static inline void gimp_draw_tool_shift_to_north_west
(gdouble x,
gdouble y,
gint handle_width,
gint handle_height,
GtkAnchorType anchor,
gdouble *shifted_x,
gdouble *shifted_y);
static inline void gimp_draw_tool_shift_to_center
(gdouble x,
gdouble y,
gint handle_width,
gint handle_height,
GtkAnchorType anchor,
gdouble *shifted_x,
gdouble *shifted_y);
G_DEFINE_TYPE (GimpDrawTool, gimp_draw_tool, GIMP_TYPE_TOOL)
#define parent_class gimp_draw_tool_parent_class
static void
gimp_draw_tool_class_init (GimpDrawToolClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpToolClass *tool_class = GIMP_TOOL_CLASS (klass);
object_class->finalize = gimp_draw_tool_finalize;
tool_class->has_display = gimp_draw_tool_has_display;
tool_class->has_image = gimp_draw_tool_has_image;
tool_class->control = gimp_draw_tool_control;
klass->draw = gimp_draw_tool_real_draw;
}
static void
gimp_draw_tool_init (GimpDrawTool *draw_tool)
{
draw_tool->display = NULL;
draw_tool->paused_count = 0;
draw_tool->vectors = NULL;
draw_tool->transform = NULL;
}
static void
gimp_draw_tool_finalize (GObject *object)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (object);
if (draw_tool->vectors)
{
g_list_foreach (draw_tool->vectors, (GFunc) g_object_unref, NULL);
g_list_free (draw_tool->vectors);
draw_tool->vectors = NULL;
}
if (draw_tool->transform)
{
g_free (draw_tool->transform);
draw_tool->transform = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gimp_draw_tool_has_display (GimpTool *tool,
GimpDisplay *display)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
return (display == draw_tool->display ||
GIMP_TOOL_CLASS (parent_class)->has_display (tool, display));
}
static GimpDisplay *
gimp_draw_tool_has_image (GimpTool *tool,
GimpImage *image)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
GimpDisplay *display;
display = GIMP_TOOL_CLASS (parent_class)->has_image (tool, image);
if (! display && draw_tool->display)
{
if (image && draw_tool->display->image == image)
display = draw_tool->display;
/* NULL image means any display */
if (! image)
display = draw_tool->display;
}
return display;
}
static void
gimp_draw_tool_control (GimpTool *tool,
GimpToolAction action,
GimpDisplay *display)
{
GimpDrawTool *draw_tool = GIMP_DRAW_TOOL (tool);
switch (action)
{
case GIMP_TOOL_ACTION_PAUSE:
gimp_draw_tool_pause (draw_tool);
break;
case GIMP_TOOL_ACTION_RESUME:
gimp_draw_tool_resume (draw_tool);
break;
case GIMP_TOOL_ACTION_HALT:
gimp_draw_tool_stop (draw_tool);
break;
}
GIMP_TOOL_CLASS (parent_class)->control (tool, action, display);
}
static void
gimp_draw_tool_draw (GimpDrawTool *draw_tool)
{
if (draw_tool->paused_count == 0 && draw_tool->display)
{
GIMP_DRAW_TOOL_GET_CLASS (draw_tool)->draw (draw_tool);
}
}
static void
gimp_draw_tool_real_draw (GimpDrawTool *draw_tool)
{
GList *list;
if (! draw_tool->vectors)
return;
for (list = draw_tool->vectors; list; list = g_list_next (list))
{
GimpVectors *vectors = list->data;
GimpStroke *stroke = NULL;
while ((stroke = gimp_vectors_stroke_get_next (vectors, stroke)))
{
GArray *coords;
gboolean closed;
coords = gimp_stroke_interpolate (stroke, 1.0, &closed);
if (coords && coords->len)
{
if (draw_tool->transform)
{
gint i;
for (i = 0; i < coords->len; i++)
{
GimpCoords *curr = &g_array_index (coords, GimpCoords, i);
gimp_matrix3_transform_point (draw_tool->transform,
curr->x, curr->y,
&curr->x, &curr->y);
}
}
gimp_draw_tool_draw_strokes (draw_tool,
&g_array_index (coords,
GimpCoords, 0),
coords->len, FALSE, FALSE);
}
if (coords)
g_array_free (coords, TRUE);
}
}
}
void
gimp_draw_tool_start (GimpDrawTool *draw_tool,
GimpDisplay *display)
{
GimpDisplayShell *shell;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
g_return_if_fail (GIMP_IS_DISPLAY (display));
shell = GIMP_DISPLAY_SHELL (display->shell);
gimp_draw_tool_stop (draw_tool);
draw_tool->display = display;
gimp_draw_tool_draw (draw_tool);
}
void
gimp_draw_tool_stop (GimpDrawTool *draw_tool)
{
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
gimp_draw_tool_draw (draw_tool);
draw_tool->display = NULL;
}
gboolean
gimp_draw_tool_is_active (GimpDrawTool *draw_tool)
{
g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), FALSE);
return draw_tool->display != NULL;
}
void
gimp_draw_tool_pause (GimpDrawTool *draw_tool)
{
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
gimp_draw_tool_draw (draw_tool);
draw_tool->paused_count++;
}
void
gimp_draw_tool_resume (GimpDrawTool *draw_tool)
{
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
if (draw_tool->paused_count > 0)
{
draw_tool->paused_count--;
gimp_draw_tool_draw (draw_tool);
}
else
{
g_warning ("%s: called with draw_tool->paused_count == 0", G_STRFUNC);
}
}
void
gimp_draw_tool_set_vectors (GimpDrawTool *draw_tool,
GList *vectors)
{
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
gimp_draw_tool_pause (draw_tool);
if (draw_tool->vectors)
{
g_list_foreach (draw_tool->vectors, (GFunc) g_object_unref, NULL);
g_list_free (draw_tool->vectors);
draw_tool->vectors = NULL;
}
if (vectors)
{
draw_tool->vectors = g_list_copy (vectors);
g_list_foreach (draw_tool->vectors, (GFunc) g_object_ref, NULL);
}
gimp_draw_tool_resume (draw_tool);
}
void
gimp_draw_tool_set_transform (GimpDrawTool *draw_tool,
GimpMatrix3 *transform)
{
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
gimp_draw_tool_pause (draw_tool);
if (draw_tool->transform)
{
g_free (draw_tool->transform);
draw_tool->transform = NULL;
}
if (transform)
draw_tool->transform = g_memdup (transform, sizeof (GimpMatrix3));
gimp_draw_tool_resume (draw_tool);
}
/**
* gimp_draw_tool_calc_distance:
* @draw_tool: a #GimpDrawTool
* @display: a #GimpDisplay
* @x1: start point X in image coordinates
* @y1: start point Y in image coordinates
* @x1: end point X in image coordinates
* @y1: end point Y in image coordinates
*
* Returns: the distance between the given points in display coordinates
**/
gdouble
gimp_draw_tool_calc_distance (GimpDrawTool *draw_tool,
GimpDisplay *display,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
GimpDisplayShell *shell;
gdouble tx1, ty1;
gdouble tx2, ty2;
g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), 0.0);
g_return_val_if_fail (GIMP_IS_DISPLAY (display), 0.0);
shell = GIMP_DISPLAY_SHELL (display->shell);
gimp_display_shell_transform_xy_f (shell, x1, y1, &tx1, &ty1, FALSE);
gimp_display_shell_transform_xy_f (shell, x2, y2, &tx2, &ty2, FALSE);
return sqrt (SQR (tx2 - tx1) + SQR (ty2 - ty1));
}
/**
* gimp_draw_tool_in_radius:
* @draw_tool: a #GimpDrawTool
* @display: a #GimpDisplay
* @x1: start point X in image coordinates
* @y1: start point Y in image coordinates
* @x1: end point X in image coordinates
* @y1: end point Y in image coordinates
* @radius: distance in screen coordinates, not image coordinates
*
* The points are in image space coordinates.
*
* Returns: %TRUE if the points are within radius of each other,
* %FALSE otherwise
**/
gboolean
gimp_draw_tool_in_radius (GimpDrawTool *draw_tool,
GimpDisplay *display,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2,
gint radius)
{
GimpDisplayShell *shell;
gdouble tx1, ty1;
gdouble tx2, ty2;
g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), FALSE);
g_return_val_if_fail (GIMP_IS_DISPLAY (display), FALSE);
shell = GIMP_DISPLAY_SHELL (display->shell);
gimp_display_shell_transform_xy_f (shell, x1, y1, &tx1, &ty1, FALSE);
gimp_display_shell_transform_xy_f (shell, x2, y2, &tx2, &ty2, FALSE);
return (SQR (tx2 - tx1) + SQR (ty2 - ty1)) < SQR (radius);
}
/**
* gimp_draw_tool_draw_line:
* @draw_tool: the #GimpDrawTool
* @x1: start point X in image coordinates
* @y1: start point Y in image coordinates
* @x1: end point X in image coordinates
* @y1: end point Y in image coordinates
* @use_offsets: whether to use the image pixel offsets of the tool's display
*
* This function takes image space coordinates and transforms them to
* screen window coordinates, then draws a line between the resulting
* coordindates.
**/
void
gimp_draw_tool_draw_line (GimpDrawTool *draw_tool,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2,
gboolean use_offsets)
{
GimpDisplayShell *shell;
gint tx1, ty1;
gint tx2, ty2;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
shell = GIMP_DISPLAY_SHELL (draw_tool->display->shell);
gimp_display_shell_transform_xy (shell,
x1, y1,
&tx1, &ty1,
use_offsets);
gimp_display_shell_transform_xy (shell,
x2, y2,
&tx2, &ty2,
use_offsets);
gimp_canvas_draw_line (GIMP_CANVAS (shell->canvas), GIMP_CANVAS_STYLE_XOR,
tx1, ty1,
tx2, ty2);
}
/**
* gimp_draw_tool_draw_dashed_line:
* @draw_tool: the #GimpDrawTool
* @x1: start point X in image coordinates
* @y1: start point Y in image coordinates
* @x1: end point X in image coordinates
* @y1: end point Y in image coordinates
* @use_offsets: whether to use the image pixel offsets of the tool's display
*
* This function takes image space coordinates and transforms them to
* screen window coordinates, then draws a dashed line between the
* resulting coordindates.
**/
void
gimp_draw_tool_draw_dashed_line (GimpDrawTool *draw_tool,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2,
gboolean use_offsets)
{
GimpDisplayShell *shell;
gint tx1, ty1;
gint tx2, ty2;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
shell = GIMP_DISPLAY_SHELL (draw_tool->display->shell);
gimp_display_shell_transform_xy (shell,
x1, y1,
&tx1, &ty1,
use_offsets);
gimp_display_shell_transform_xy (shell,
x2, y2,
&tx2, &ty2,
use_offsets);
gimp_canvas_draw_line (GIMP_CANVAS (shell->canvas),
GIMP_CANVAS_STYLE_XOR_DASHED,
tx1, ty1,
tx2, ty2);
}
/**
* gimp_draw_tool_draw_rectangle:
* @draw_tool: the #GimpDrawTool
* @filled: whether to fill the rectangle
* @x: horizontal image coordinate
* @y: vertical image coordinate
* @width: width in image coordinates
* @height: height in image coordinates
* @use_offsets: whether to use the image pixel offsets of the tool's display
*
* This function takes image space coordinates and transforms them to
* screen window coordinates, then draws the resulting rectangle.
**/
void
gimp_draw_tool_draw_rectangle (GimpDrawTool *draw_tool,
gboolean filled,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
gboolean use_offsets)
{
GimpDisplayShell *shell;
gint tx1, ty1;
gint tx2, ty2;
guint w, h;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
shell = GIMP_DISPLAY_SHELL (draw_tool->display->shell);
gimp_display_shell_transform_xy (shell,
MIN (x, x + width), MIN (y, y + height),
&tx1, &ty1,
use_offsets);
gimp_display_shell_transform_xy (shell,
MAX (x, x + width), MAX (y, y + height),
&tx2, &ty2,
use_offsets);
tx1 = CLAMP (tx1, -1, shell->disp_width + 1);
ty1 = CLAMP (ty1, -1, shell->disp_height + 1);
tx2 = CLAMP (tx2, -1, shell->disp_width + 1);
ty2 = CLAMP (ty2, -1, shell->disp_height + 1);
tx2 -= tx1;
ty2 -= ty1;
w = MAX (0, tx2);
h = MAX (0, ty2);
if (w > 0 && h > 0)
gimp_canvas_draw_rectangle (GIMP_CANVAS (shell->canvas),
GIMP_CANVAS_STYLE_XOR,
filled,
tx1, ty1,
w - 1, h - 1);
}
void
gimp_draw_tool_draw_arc (GimpDrawTool *draw_tool,
gboolean filled,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
gint angle1,
gint angle2,
gboolean use_offsets)
{
GimpDisplayShell *shell;
gint tx1, ty1;
gint tx2, ty2;
guint w, h;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
shell = GIMP_DISPLAY_SHELL (draw_tool->display->shell);
gimp_display_shell_transform_xy (shell,
MIN (x, x + width), MIN (y, y + height),
&tx1, &ty1,
use_offsets);
gimp_display_shell_transform_xy (shell,
MAX (x, x + width), MAX (y, y + height),
&tx2, &ty2,
use_offsets);
tx2 -= tx1;
ty2 -= ty1;
w = MAX (0, tx2);
h = MAX (0, ty2);
if (w > 0 && h > 0)
{
if (w != 1 && h != 1)
{
gimp_canvas_draw_arc (GIMP_CANVAS (shell->canvas),
GIMP_CANVAS_STYLE_XOR,
filled,
tx1, ty1,
w - 1, h - 1,
angle1, angle2);
}
else
{
/* work around the problem of an 1xN or Nx1 arc not being shown
properly */
gimp_canvas_draw_rectangle (GIMP_CANVAS (shell->canvas),
GIMP_CANVAS_STYLE_XOR,
filled,
tx1, ty1,
w - 1, h - 1);
}
}
}
void
gimp_draw_tool_draw_rectangle_by_anchor (GimpDrawTool *draw_tool,
gboolean filled,
gdouble x,
gdouble y,
gint width,
gint height,
GtkAnchorType anchor,
gboolean use_offsets)
{
GimpDisplayShell *shell;
gdouble tx, ty;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
shell = GIMP_DISPLAY_SHELL (draw_tool->display->shell);
gimp_display_shell_transform_xy_f (shell,
x, y,
&tx, &ty,
use_offsets);
gimp_draw_tool_shift_to_north_west (tx, ty,
width, height,
anchor,
&tx, &ty);
if (! filled)
{
width -= 1;
height -= 1;
}
gimp_canvas_draw_rectangle (GIMP_CANVAS (shell->canvas),
GIMP_CANVAS_STYLE_XOR,
filled,
PROJ_ROUND (tx), PROJ_ROUND (ty),
width, height);
}
void
gimp_draw_tool_draw_arc_by_anchor (GimpDrawTool *draw_tool,
gboolean filled,
gdouble x,
gdouble y,
gint radius_x,
gint radius_y,
gint angle1,
gint angle2,
GtkAnchorType anchor,
gboolean use_offsets)
{
GimpDisplayShell *shell;
gdouble tx, ty;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
shell = GIMP_DISPLAY_SHELL (draw_tool->display->shell);
gimp_display_shell_transform_xy_f (shell,
x, y,
&tx, &ty,
use_offsets);
/* well... */
radius_x *= 2;
radius_y *= 2;
gimp_draw_tool_shift_to_north_west (tx, ty,
radius_x, radius_y,
anchor,
&tx, &ty);
if (! filled)
{
radius_x -= 1;
radius_y -= 1;
}
gimp_canvas_draw_arc (GIMP_CANVAS (shell->canvas), GIMP_CANVAS_STYLE_XOR,
filled,
PROJ_ROUND (tx), PROJ_ROUND (ty),
radius_x, radius_y,
angle1, angle2);
}
void
gimp_draw_tool_draw_cross_by_anchor (GimpDrawTool *draw_tool,
gdouble x,
gdouble y,
gint width,
gint height,
GtkAnchorType anchor,
gboolean use_offsets)
{
GimpDisplayShell *shell;
gdouble tx, ty;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
shell = GIMP_DISPLAY_SHELL (draw_tool->display->shell);
gimp_display_shell_transform_xy_f (shell,
x, y,
&tx, &ty,
use_offsets);
gimp_draw_tool_shift_to_center (tx, ty,
width, height,
anchor,
&tx, &ty);
gimp_canvas_draw_line (GIMP_CANVAS (shell->canvas), GIMP_CANVAS_STYLE_XOR,
PROJ_ROUND (tx), PROJ_ROUND (ty) - (height >> 1),
PROJ_ROUND (tx), PROJ_ROUND (ty) + (height >> 1));
gimp_canvas_draw_line (GIMP_CANVAS (shell->canvas), GIMP_CANVAS_STYLE_XOR,
PROJ_ROUND (tx) - (width >> 1), PROJ_ROUND (ty),
PROJ_ROUND (tx) + (width >> 1), PROJ_ROUND (ty));
}
void
gimp_draw_tool_draw_handle (GimpDrawTool *draw_tool,
GimpHandleType type,
gdouble x,
gdouble y,
gint width,
gint height,
GtkAnchorType anchor,
gboolean use_offsets)
{
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
switch (type)
{
case GIMP_HANDLE_SQUARE:
gimp_draw_tool_draw_rectangle_by_anchor (draw_tool,
FALSE,
x, y,
width,
height,
anchor,
use_offsets);
break;
case GIMP_HANDLE_FILLED_SQUARE:
gimp_draw_tool_draw_rectangle_by_anchor (draw_tool,
TRUE,
x, y,
width,
height,
anchor,
use_offsets);
break;
case GIMP_HANDLE_CIRCLE:
gimp_draw_tool_draw_arc_by_anchor (draw_tool,
FALSE,
x, y,
width >> 1,
height >> 1,
0, 360 * 64,
anchor,
use_offsets);
break;
case GIMP_HANDLE_FILLED_CIRCLE:
gimp_draw_tool_draw_arc_by_anchor (draw_tool,
TRUE,
x, y,
width >> 1,
height >> 1,
0, 360 * 64,
anchor,
use_offsets);
break;
case GIMP_HANDLE_CROSS:
gimp_draw_tool_draw_cross_by_anchor (draw_tool,
x, y,
width,
height,
anchor,
use_offsets);
break;
default:
g_warning ("%s: invalid handle type %d", G_STRFUNC, type);
break;
}
}
gboolean
gimp_draw_tool_on_handle (GimpDrawTool *draw_tool,
GimpDisplay *display,
gdouble x,
gdouble y,
GimpHandleType type,
gdouble handle_x,
gdouble handle_y,
gint width,
gint height,
GtkAnchorType anchor,
gboolean use_offsets)
{
GimpDisplayShell *shell;
gdouble tx, ty;
gdouble handle_tx, handle_ty;
g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), FALSE);
g_return_val_if_fail (GIMP_IS_DISPLAY (display), FALSE);
shell = GIMP_DISPLAY_SHELL (display->shell);
gimp_display_shell_transform_xy_f (shell,
x, y,
&tx, &ty,
use_offsets);
gimp_display_shell_transform_xy_f (shell,
handle_x, handle_y,
&handle_tx, &handle_ty,
use_offsets);
switch (type)
{
case GIMP_HANDLE_SQUARE:
case GIMP_HANDLE_FILLED_SQUARE:
case GIMP_HANDLE_CROSS:
gimp_draw_tool_shift_to_north_west (handle_tx, handle_ty,
width, height,
anchor,
&handle_tx, &handle_ty);
return (tx == CLAMP (tx, handle_tx, handle_tx + width) &&
ty == CLAMP (ty, handle_ty, handle_ty + height));
case GIMP_HANDLE_CIRCLE:
case GIMP_HANDLE_FILLED_CIRCLE:
gimp_draw_tool_shift_to_center (handle_tx, handle_ty,
width, height,
anchor,
&handle_tx, &handle_ty);
/* FIXME */
if (width != height)
width = (width + height) / 2;
width /= 2;
return ((SQR (handle_tx - tx) + SQR (handle_ty - ty)) < SQR (width));
default:
g_warning ("%s: invalid handle type %d", G_STRFUNC, type);
break;
}
return FALSE;
}
gboolean
gimp_draw_tool_on_vectors_handle (GimpDrawTool *draw_tool,
GimpDisplay *display,
GimpVectors *vectors,
const GimpCoords *coord,
gint width,
gint height,
GimpAnchorType preferred,
gboolean exclusive,
GimpAnchor **ret_anchor,
GimpStroke **ret_stroke)
{
GimpStroke *stroke = NULL;
GimpStroke *pref_stroke = NULL;
GimpAnchor *anchor = NULL;
GimpAnchor *pref_anchor = NULL;
GList *list;
gdouble dx, dy;
gdouble pref_mindist = -1;
gdouble mindist = -1;
g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), FALSE);
g_return_val_if_fail (GIMP_IS_DISPLAY (display), FALSE);
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), FALSE);
g_return_val_if_fail (coord != NULL, FALSE);
if (ret_anchor) *ret_anchor = NULL;
if (ret_stroke) *ret_stroke = NULL;
while ((stroke = gimp_vectors_stroke_get_next (vectors, stroke)))
{
GList *anchor_list;
anchor_list = gimp_stroke_get_draw_anchors (stroke);
list = gimp_stroke_get_draw_controls (stroke);
anchor_list = g_list_concat (anchor_list, list);
while (anchor_list)
{
dx = coord->x - GIMP_ANCHOR (anchor_list->data)->position.x;
dy = coord->y - GIMP_ANCHOR (anchor_list->data)->position.y;
if (mindist < 0 || mindist > dx * dx + dy * dy)
{
mindist = dx * dx + dy * dy;
anchor = GIMP_ANCHOR (anchor_list->data);
if (ret_stroke)
*ret_stroke = stroke;
}
if ((pref_mindist < 0 || pref_mindist > dx * dx + dy * dy) &&
GIMP_ANCHOR (anchor_list->data)->type == preferred)
{
pref_mindist = dx * dx + dy * dy;
pref_anchor = GIMP_ANCHOR (anchor_list->data);
pref_stroke = stroke;
}
anchor_list = anchor_list->next;
}
g_list_free (anchor_list);
}
/* If the data passed into ret_anchor is a preferred anchor, return it. */
if (ret_anchor && *ret_anchor &&
gimp_draw_tool_on_handle (draw_tool, display,
coord->x,
coord->y,
GIMP_HANDLE_CIRCLE,
(*ret_anchor)->position.x,
(*ret_anchor)->position.y,
width, height,
GTK_ANCHOR_CENTER,
FALSE) &&
(*ret_anchor)->type == preferred)
{
if (ret_stroke) *ret_stroke = pref_stroke;
return TRUE;
}
if (pref_anchor && gimp_draw_tool_on_handle (draw_tool, display,
coord->x,
coord->y,
GIMP_HANDLE_CIRCLE,
pref_anchor->position.x,
pref_anchor->position.y,
width, height,
GTK_ANCHOR_CENTER,
FALSE))
{
if (ret_anchor) *ret_anchor = pref_anchor;
if (ret_stroke) *ret_stroke = pref_stroke;
return TRUE;
}
else if (!exclusive && anchor &&
gimp_draw_tool_on_handle (draw_tool, display,
coord->x,
coord->y,
GIMP_HANDLE_CIRCLE,
anchor->position.x,
anchor->position.y,
width, height,
GTK_ANCHOR_CENTER,
FALSE))
{
if (ret_anchor)
*ret_anchor = anchor;
/* *ret_stroke already set correctly. */
return TRUE;
}
if (ret_anchor)
*ret_anchor = NULL;
if (ret_stroke)
*ret_stroke = NULL;
return FALSE;
}
gboolean
gimp_draw_tool_on_vectors_curve (GimpDrawTool *draw_tool,
GimpDisplay *display,
GimpVectors *vectors,
const GimpCoords *coord,
gint width,
gint height,
GimpCoords *ret_coords,
gdouble *ret_pos,
GimpAnchor **ret_segment_start,
GimpAnchor **ret_segment_end,
GimpStroke **ret_stroke)
{
GimpStroke *stroke = NULL;
GimpAnchor *segment_start;
GimpAnchor *segment_end;
GimpCoords min_coords = GIMP_COORDS_DEFAULT_VALUES;
GimpCoords cur_coords;
gdouble min_dist, cur_dist, cur_pos;
g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), FALSE);
g_return_val_if_fail (GIMP_IS_DISPLAY (display), FALSE);
g_return_val_if_fail (GIMP_IS_VECTORS (vectors), FALSE);
g_return_val_if_fail (coord != NULL, FALSE);
if (ret_coords) *ret_coords = *coord;
if (ret_pos) *ret_pos = -1.0;
if (ret_segment_start) *ret_segment_start = NULL;
if (ret_segment_start) *ret_segment_end = NULL;
if (ret_stroke) *ret_stroke = NULL;
min_dist = -1.0;
while ((stroke = gimp_vectors_stroke_get_next (vectors, stroke)))
{
cur_dist = gimp_stroke_nearest_point_get (stroke, coord, 1.0,
&cur_coords,
&segment_start,
&segment_end,
&cur_pos);
if (cur_dist >= 0 && (min_dist < 0 || cur_dist < min_dist))
{
min_dist = cur_dist;
min_coords = cur_coords;
if (ret_coords) *ret_coords = cur_coords;
if (ret_pos) *ret_pos = cur_pos;
if (ret_segment_start) *ret_segment_start = segment_start;
if (ret_segment_end) *ret_segment_end = segment_end;
if (ret_stroke) *ret_stroke = stroke;
}
}
if (min_dist >= 0 &&
gimp_draw_tool_on_handle (draw_tool, display,
coord->x,
coord->y,
GIMP_HANDLE_CIRCLE,
min_coords.x,
min_coords.y,
width, height,
GTK_ANCHOR_CENTER,
FALSE))
{
return TRUE;
}
return FALSE;
}
gboolean
gimp_draw_tool_on_vectors (GimpDrawTool *draw_tool,
GimpDisplay *display,
const GimpCoords *coords,
gint width,
gint height,
GimpCoords *ret_coords,
gdouble *ret_pos,
GimpAnchor **ret_segment_start,
GimpAnchor **ret_segment_end,
GimpStroke **ret_stroke,
GimpVectors **ret_vectors)
{
GList *list;
if (ret_coords) *ret_coords = *coords;
if (ret_pos) *ret_pos = -1.0;
if (ret_segment_start) *ret_segment_start = NULL;
if (ret_segment_end) *ret_segment_end = NULL;
if (ret_stroke) *ret_stroke = NULL;
if (ret_vectors) *ret_vectors = NULL;
for (list = GIMP_LIST (display->image->vectors)->list;
list;
list = g_list_next (list))
{
GimpVectors *vectors = list->data;
if (! gimp_item_get_visible (GIMP_ITEM (vectors)))
continue;
if (gimp_draw_tool_on_vectors_curve (draw_tool,
display,
vectors, coords,
width, height,
ret_coords,
ret_pos,
ret_segment_start,
ret_segment_end,
ret_stroke))
{
if (ret_vectors)
*ret_vectors = vectors;
return TRUE;
}
}
return FALSE;
}
void
gimp_draw_tool_draw_lines (GimpDrawTool *draw_tool,
const gdouble *points,
gint n_points,
gboolean filled,
gboolean use_offsets)
{
GimpDisplayShell *shell;
GdkPoint *coords;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
if (n_points == 0)
return;
shell = GIMP_DISPLAY_SHELL (draw_tool->display->shell);
coords = g_new (GdkPoint, n_points);
gimp_display_shell_transform_points (shell,
points, coords, n_points, use_offsets);
if (filled)
{
gimp_canvas_draw_polygon (GIMP_CANVAS (shell->canvas),
GIMP_CANVAS_STYLE_XOR,
TRUE, coords, n_points);
}
else
{
gimp_canvas_draw_lines (GIMP_CANVAS (shell->canvas),
GIMP_CANVAS_STYLE_XOR,
coords, n_points);
}
g_free (coords);
}
void
gimp_draw_tool_draw_strokes (GimpDrawTool *draw_tool,
const GimpCoords *points,
gint n_points,
gboolean filled,
gboolean use_offsets)
{
GimpDisplayShell *shell;
GdkPoint *coords;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
if (n_points == 0)
return;
shell = GIMP_DISPLAY_SHELL (draw_tool->display->shell);
coords = g_new (GdkPoint, n_points);
gimp_display_shell_transform_coords (shell,
points, coords, n_points, use_offsets);
if (filled)
{
gimp_canvas_draw_polygon (GIMP_CANVAS (shell->canvas),
GIMP_CANVAS_STYLE_XOR,
TRUE, coords, n_points);
}
else
{
gimp_canvas_draw_lines (GIMP_CANVAS (shell->canvas),
GIMP_CANVAS_STYLE_XOR,
coords, n_points);
}
g_free (coords);
}
/**
* gimp_draw_tool_draw_boundary:
* @draw_tool: a #GimpDrawTool
* @bound_segs: the sorted brush outline
* @n_bound_segs: the number of segments in @bound_segs
* @offset_x: x offset
* @offset_y: y offset
* @use_offsets: whether to use offsets
*
* Draw the boundary of the brush that @draw_tool uses. The boundary
* should be sorted with sort_boundary(), and @n_bound_segs should
* include the sentinel segments inserted by sort_boundary() that
* indicate the end of connected segment sequences (groups) .
*/
void
gimp_draw_tool_draw_boundary (GimpDrawTool *draw_tool,
const BoundSeg *bound_segs,
gint n_bound_segs,
gdouble offset_x,
gdouble offset_y,
gboolean use_offsets)
{
GimpDisplayShell *shell;
GdkPoint *gdk_points;
gint n_gdk_points;
gint xmax, ymax;
gint x, y;
gint i;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
g_return_if_fail (n_bound_segs > 0);
g_return_if_fail (bound_segs != NULL);
shell = GIMP_DISPLAY_SHELL (draw_tool->display->shell);
gdk_points = g_new0 (GdkPoint, n_bound_segs + 1);
n_gdk_points = 0;
xmax = shell->disp_width + 1;
ymax = shell->disp_height + 1;
/* The sorted boundary has sentinel segments inserted at the end of
* each group.
*/
for (i = 0; i < n_bound_segs; i++)
{
if (bound_segs[i].x1 == -1 &&
bound_segs[i].y1 == -1 &&
bound_segs[i].x2 == -1 &&
bound_segs[i].y2 == -1)
{
/* Group ends */
gimp_canvas_draw_lines (GIMP_CANVAS (shell->canvas),
GIMP_CANVAS_STYLE_XOR_DOTTED,
gdk_points, n_gdk_points);
n_gdk_points = 0;
continue;
}
if (n_gdk_points == 0)
{
gimp_display_shell_transform_xy (shell,
bound_segs[i].x1 + offset_x,
bound_segs[i].y1 + offset_y,
&x, &y,
use_offsets);
gdk_points[0].x = CLAMP (x, -1, xmax);
gdk_points[0].y = CLAMP (y, -1, ymax);
n_gdk_points++;
}
g_assert (n_gdk_points < n_bound_segs + 1);
gimp_display_shell_transform_xy (shell,
bound_segs[i].x2 + offset_x,
bound_segs[i].y2 + offset_y,
&x, &y,
use_offsets);
gdk_points[n_gdk_points].x = CLAMP (x, -1, xmax);
gdk_points[n_gdk_points].y = CLAMP (y, -1, ymax);
n_gdk_points++;
}
g_free (gdk_points);
}
/* private functions */
static inline void
gimp_draw_tool_shift_to_north_west (gdouble x,
gdouble y,
gint handle_width,
gint handle_height,
GtkAnchorType anchor,
gdouble *shifted_x,
gdouble *shifted_y)
{
switch (anchor)
{
case GTK_ANCHOR_CENTER:
x -= (handle_width >> 1);
y -= (handle_height >> 1);
break;
case GTK_ANCHOR_NORTH:
x -= (handle_width >> 1);
break;
case GTK_ANCHOR_NORTH_WEST:
/* nothing, this is the default */
break;
case GTK_ANCHOR_NORTH_EAST:
x -= handle_width;
break;
case GTK_ANCHOR_SOUTH:
x -= (handle_width >> 1);
y -= handle_height;
break;
case GTK_ANCHOR_SOUTH_WEST:
y -= handle_height;
break;
case GTK_ANCHOR_SOUTH_EAST:
x -= handle_width;
y -= handle_height;
break;
case GTK_ANCHOR_WEST:
y -= (handle_height >> 1);
break;
case GTK_ANCHOR_EAST:
x -= handle_width;
y -= (handle_height >> 1);
break;
default:
break;
}
if (shifted_x)
*shifted_x = x;
if (shifted_y)
*shifted_y = y;
}
static inline void
gimp_draw_tool_shift_to_center (gdouble x,
gdouble y,
gint handle_width,
gint handle_height,
GtkAnchorType anchor,
gdouble *shifted_x,
gdouble *shifted_y)
{
switch (anchor)
{
case GTK_ANCHOR_CENTER:
/* nothing, this is the default */
break;
case GTK_ANCHOR_NORTH:
y += (handle_height >> 1);
break;
case GTK_ANCHOR_NORTH_WEST:
x += (handle_width >> 1);
y += (handle_height >> 1);
break;
case GTK_ANCHOR_NORTH_EAST:
x -= (handle_width >> 1);
y += (handle_height >> 1);
break;
case GTK_ANCHOR_SOUTH:
y -= (handle_height >> 1);
break;
case GTK_ANCHOR_SOUTH_WEST:
x += (handle_width >> 1);
y -= (handle_height >> 1);
break;
case GTK_ANCHOR_SOUTH_EAST:
x -= (handle_width >> 1);
y -= (handle_height >> 1);
break;
case GTK_ANCHOR_WEST:
x += (handle_width >> 1);
break;
case GTK_ANCHOR_EAST:
x -= (handle_width >> 1);
break;
default:
break;
}
if (shifted_x)
*shifted_x = x;
if (shifted_y)
*shifted_y = y;
}
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