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gimp/app/tools/gimpscaletool.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 "libgimpmath/gimpmath.h"
#include "libgimpbase/gimpbase.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "core/gimpimage.h"
#include "gui/info-dialog.h"
#include "gimpscaletool.h"
#include "tool_manager.h"
#include "tool_options.h"
#include "transform_options.h"
#include "gdisplay.h"
#include "gimpprogress.h"
#include "undo.h"
#include "libgimp/gimpintl.h"
/* forward function declarations */
static TileManager * gimp_scale_tool_transform (GimpTransformTool *tool,
GDisplay *gdisp,
TransformState state);
static void gimp_scale_tool_recalc (GimpScaleTool *tool,
GDisplay *gdisp);
static void gimp_scale_tool_motion (GimpScaleTool *tool,
GDisplay *gdisp);
static void gimp_scale_tool_info_update (GimpScaleTool *tool);
static void gimp_scale_tool_size_changed (GtkWidget *widget,
gpointer data);
static void gimp_scale_tool_unit_changed (GtkWidget *widget,
gpointer data);
static void gimp_scale_tool_class_init (GimpScaleToolClass *klass);
static void gimp_scale_tool_init (GimpScaleTool *sc_tool);
/* storage for information dialog fields */
static gchar orig_width_buf[MAX_INFO_BUF];
static gchar orig_height_buf[MAX_INFO_BUF];
static gdouble size_vals[2];
static gchar x_ratio_buf[MAX_INFO_BUF];
static gchar y_ratio_buf[MAX_INFO_BUF];
/* needed for original size unit update */
static GtkWidget *sizeentry = NULL;
static GimpTransformToolClass *parent_class = NULL;
static TransformOptions *scale_options = NULL;
void
gimp_scale_tool_register (Gimp *gimp)
{
tool_manager_register_tool (gimp,
GIMP_TYPE_SCALE_TOOL,
FALSE,
"gimp:scale_tool",
_("Scale Tool"),
_("Scale the layer or selection"),
N_("/Tools/Transform Tools/Scale"), "<shift>T",
NULL, "tools/transform.html",
GIMP_STOCK_TOOL_SCALE);
}
GType
gimp_scale_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
GtkTypeInfo tool_info =
{
"GimpScaleTool",
sizeof (GimpScaleTool),
sizeof (GimpScaleToolClass),
(GtkClassInitFunc) gimp_scale_tool_class_init,
(GtkObjectInitFunc) gimp_scale_tool_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
tool_type = gtk_type_unique (GIMP_TYPE_TRANSFORM_TOOL, &tool_info);
}
return tool_type;
}
static void
gimp_scale_tool_class_init (GimpScaleToolClass *klass)
{
GtkObjectClass *object_class;
GimpToolClass *tool_class;
GimpTransformToolClass *transform_class;
object_class = (GtkObjectClass *) klass;
tool_class = (GimpToolClass *) klass;
transform_class = (GimpTransformToolClass *) klass;
parent_class = g_type_class_peek_parent (klass);
transform_class->transform = gimp_scale_tool_transform;
}
static void
gimp_scale_tool_init (GimpScaleTool *sc_tool)
{
GimpTool *tool;
GimpTransformTool *tr_tool;
tool = GIMP_TOOL (sc_tool);
tr_tool = GIMP_TRANSFORM_TOOL (sc_tool);
if (! scale_options)
{
scale_options = transform_options_new (GIMP_TYPE_SCALE_TOOL,
transform_options_reset);
tool_manager_register_tool_options (GIMP_TYPE_SCALE_TOOL,
(GimpToolOptions *) scale_options);
}
tool->tool_cursor = GIMP_RESIZE_TOOL_CURSOR;
/* set the scale specific transformation attributes */
tr_tool->trans_info[X0] = 0.0;
tr_tool->trans_info[Y0] = 0.0;
tr_tool->trans_info[X1] = 0.0;
tr_tool->trans_info[Y1] = 0.0;
/* assemble the transformation matrix */
gimp_matrix3_identity (tr_tool->transform); /* FIXME name is confusing */
}
static TileManager *
gimp_scale_tool_transform (GimpTransformTool *tr_tool,
GDisplay *gdisp,
TransformState state)
{
GimpScaleTool *sc_tool;
GtkWidget *spinbutton;
GimpTool *tool;
sc_tool = GIMP_SCALE_TOOL (tr_tool);
tool = GIMP_TOOL (sc_tool);
switch (state)
{
case TRANSFORM_INIT:
size_vals[0] = tr_tool->x2 - tr_tool->x1;
size_vals[1] = tr_tool->y2 - tr_tool->y1;
if (!transform_info)
{
transform_info = info_dialog_new (_("Scaling Information"),
gimp_standard_help_func,
"tools/transform_scale.html");
info_dialog_add_label (transform_info, _("Original Width:"),
orig_width_buf);
info_dialog_add_label (transform_info, _("Height:"),
orig_height_buf);
spinbutton =
info_dialog_add_spinbutton (transform_info, _("Current Width:"),
NULL, -1, 1, 1, 10, 1, 1, 2, NULL, NULL);
sizeentry =
info_dialog_add_sizeentry (transform_info, _("Height:"),
size_vals, 1,
gdisp->gimage->unit, "%a",
TRUE, TRUE, FALSE,
GIMP_SIZE_ENTRY_UPDATE_SIZE,
G_CALLBACK (gimp_scale_tool_size_changed),
tool);
g_signal_connect (G_OBJECT (sizeentry), "unit_changed",
G_CALLBACK (gimp_scale_tool_unit_changed),
tool);
gimp_size_entry_add_field (GIMP_SIZE_ENTRY (sizeentry),
GTK_SPIN_BUTTON (spinbutton), NULL);
info_dialog_add_label (transform_info, _("Scale Ratio X:"),
x_ratio_buf);
info_dialog_add_label (transform_info, _("Y:"),
y_ratio_buf);
gtk_table_set_row_spacing (GTK_TABLE (transform_info->info_table),
1, 4);
gtk_table_set_row_spacing (GTK_TABLE (transform_info->info_table),
2, 0);
}
g_signal_handlers_block_by_func (G_OBJECT (sizeentry),
gimp_scale_tool_size_changed,
tool);
g_signal_handlers_block_by_func (G_OBJECT (sizeentry),
gimp_scale_tool_unit_changed,
tool);
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (sizeentry),
gdisp->gimage->unit);
if (gdisp->dot_for_dot)
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (sizeentry), GIMP_UNIT_PIXEL);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (sizeentry), 0,
gdisp->gimage->xresolution, FALSE);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (sizeentry), 1,
gdisp->gimage->yresolution, FALSE);
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (sizeentry), 0,
GIMP_MIN_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE);
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (sizeentry), 1,
GIMP_MIN_IMAGE_SIZE,
GIMP_MAX_IMAGE_SIZE);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (sizeentry), 0,
0, size_vals[0]);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (sizeentry), 1,
0, size_vals[1]);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (sizeentry), 0,
size_vals[0]);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (sizeentry), 1,
size_vals[1]);
gtk_widget_set_sensitive (GTK_WIDGET (transform_info->shell), TRUE);
g_signal_handlers_unblock_by_func (G_OBJECT (sizeentry),
gimp_scale_tool_size_changed,
tool);
g_signal_handlers_unblock_by_func (G_OBJECT (sizeentry),
gimp_scale_tool_unit_changed,
tool);
tr_tool->trans_info [X0] = (double) tr_tool->x1;
tr_tool->trans_info [Y0] = (double) tr_tool->y1;
tr_tool->trans_info [X1] = (double) tr_tool->x2;
tr_tool->trans_info [Y1] = (double) tr_tool->y2;
return NULL;
break;
case TRANSFORM_MOTION:
gimp_scale_tool_motion (sc_tool, gdisp);
gimp_scale_tool_recalc (sc_tool, gdisp);
break;
case TRANSFORM_RECALC:
gimp_scale_tool_recalc (sc_tool, gdisp);
break;
case TRANSFORM_FINISH:
gtk_widget_set_sensitive (GTK_WIDGET (transform_info->shell), FALSE);
return gimp_scale_tool_scale (gdisp->gimage,
gimp_image_active_drawable (gdisp->gimage),
gdisp,
tr_tool->trans_info,
tr_tool->original,
gimp_transform_tool_smoothing (),
tr_tool->transform);
break;
}
return NULL;
}
static void
gimp_scale_tool_info_update (GimpScaleTool *sc_tool)
{
GimpTool *tool;
GimpTransformTool *tr_tool;
gdouble ratio_x, ratio_y;
gint x1, y1, x2, y2, x3, y3, x4, y4;
GimpUnit unit;
gdouble unit_factor;
gchar format_buf[16];
static GimpUnit label_unit = GIMP_UNIT_PIXEL;
tool = GIMP_TOOL (sc_tool);
tr_tool = GIMP_TRANSFORM_TOOL (sc_tool);
unit = gimp_size_entry_get_unit (GIMP_SIZE_ENTRY (sizeentry));;
/* Find original sizes */
x1 = tr_tool->x1;
y1 = tr_tool->y1;
x2 = tr_tool->x2;
y2 = tr_tool->y2;
if (unit != GIMP_UNIT_PERCENT)
label_unit = unit;
unit_factor = gimp_unit_get_factor (label_unit);
if (label_unit) /* unit != GIMP_UNIT_PIXEL */
{
g_snprintf (format_buf, sizeof (format_buf), "%%.%df %s",
gimp_unit_get_digits (label_unit) + 1,
gimp_unit_get_symbol (label_unit));
g_snprintf (orig_width_buf, MAX_INFO_BUF, format_buf,
(x2 - x1) * unit_factor / tool->gdisp->gimage->xresolution);
g_snprintf (orig_height_buf, MAX_INFO_BUF, format_buf,
(y2 - y1) * unit_factor / tool->gdisp->gimage->yresolution);
}
else /* unit == GIMP_UNIT_PIXEL */
{
g_snprintf (orig_width_buf, MAX_INFO_BUF, "%d", x2 - x1);
g_snprintf (orig_height_buf, MAX_INFO_BUF, "%d", y2 - y1);
}
/* Find current sizes */
x3 = (int) tr_tool->trans_info [X0];
y3 = (int) tr_tool->trans_info [Y0];
x4 = (int) tr_tool->trans_info [X1];
y4 = (int) tr_tool->trans_info [Y1];
size_vals[0] = x4 - x3;
size_vals[1] = y4 - y3;
ratio_x = ratio_y = 0.0;
if (x2 - x1)
ratio_x = (double) (x4 - x3) / (double) (x2 - x1);
if (y2 - y1)
ratio_y = (double) (y4 - y3) / (double) (y2 - y1);
g_snprintf (x_ratio_buf, MAX_INFO_BUF, "%0.2f", ratio_x);
g_snprintf (y_ratio_buf, MAX_INFO_BUF, "%0.2f", ratio_y);
info_dialog_update (transform_info);
info_dialog_popup (transform_info);
}
static void
gimp_scale_tool_size_changed (GtkWidget *widget,
gpointer data)
{
GimpTool *tool;
GimpTransformTool *tr_tool;
GimpDrawTool *dr_tool;
gint width;
gint height;
tool = GIMP_TOOL(data);
if (tool)
{
tr_tool = GIMP_TRANSFORM_TOOL(tool);
dr_tool = GIMP_DRAW_TOOL(tool);
width = RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0));
height = RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 1));
if ((width != (tr_tool->trans_info[X1] -
tr_tool->trans_info[X0])) ||
(height != (tr_tool->trans_info[Y1] -
tr_tool->trans_info[Y0])))
{
gimp_draw_tool_pause (dr_tool);
tr_tool->trans_info[X1] =
tr_tool->trans_info[X0] + width;
tr_tool->trans_info[Y1] =
tr_tool->trans_info[Y0] + height;
gimp_scale_tool_recalc (GIMP_SCALE_TOOL(tool), tool->gdisp);
gimp_draw_tool_resume (dr_tool);
}
}
}
static void
gimp_scale_tool_unit_changed (GtkWidget *widget,
gpointer data)
{
gimp_scale_tool_info_update (GIMP_SCALE_TOOL (data));
}
static void
gimp_scale_tool_motion (GimpScaleTool *sc_tool,
GDisplay *gdisp)
{
GimpTransformTool *tr_tool;
gdouble ratio;
gdouble *x1;
gdouble *y1;
gdouble *x2;
gdouble *y2;
gint w, h;
gint dir_x, dir_y;
gint diff_x, diff_y;
tr_tool = GIMP_TRANSFORM_TOOL(sc_tool);
diff_x = tr_tool->curx - tr_tool->lastx;
diff_y = tr_tool->cury - tr_tool->lasty;
switch (tr_tool->function)
{
case TRANSFORM_HANDLE_1:
x1 = &tr_tool->trans_info [X0];
y1 = &tr_tool->trans_info [Y0];
x2 = &tr_tool->trans_info [X1];
y2 = &tr_tool->trans_info [Y1];
dir_x = dir_y = 1;
break;
case TRANSFORM_HANDLE_2:
x1 = &tr_tool->trans_info [X1];
y1 = &tr_tool->trans_info [Y0];
x2 = &tr_tool->trans_info [X0];
y2 = &tr_tool->trans_info [Y1];
dir_x = -1;
dir_y = 1;
break;
case TRANSFORM_HANDLE_3:
x1 = &tr_tool->trans_info [X0];
y1 = &tr_tool->trans_info [Y1];
x2 = &tr_tool->trans_info [X1];
y2 = &tr_tool->trans_info [Y0];
dir_x = 1;
dir_y = -1;
break;
case TRANSFORM_HANDLE_4:
x1 = &tr_tool->trans_info [X1];
y1 = &tr_tool->trans_info [Y1];
x2 = &tr_tool->trans_info [X0];
y2 = &tr_tool->trans_info [Y0];
dir_x = dir_y = -1;
break;
case TRANSFORM_HANDLE_CENTER:
return;
default:
return;
}
/* if just the mod1 key is down, affect only the height */
if (tr_tool->state & GDK_MOD1_MASK &&
! (tr_tool->state & GDK_CONTROL_MASK))
diff_x = 0;
/* if just the control key is down, affect only the width */
else if (tr_tool->state & GDK_CONTROL_MASK &&
! (tr_tool->state & GDK_MOD1_MASK))
diff_y = 0;
*x1 += diff_x;
*y1 += diff_y;
if (dir_x > 0)
{
if (*x1 >= *x2) *x1 = *x2 - 1;
}
else
{
if (*x1 <= *x2) *x1 = *x2 + 1;
}
if (dir_y > 0)
{
if (*y1 >= *y2) *y1 = *y2 - 1;
}
else
{
if (*y1 <= *y2) *y1 = *y2 + 1;
}
/* if both the control key & mod1 keys are down,
* keep the aspect ratio intact
*/
if (tr_tool->state & GDK_CONTROL_MASK &&
tr_tool->state & GDK_MOD1_MASK)
{
ratio = (double) (tr_tool->x2 - tr_tool->x1) /
(double) (tr_tool->y2 - tr_tool->y1);
w = ABS ((*x2 - *x1));
h = ABS ((*y2 - *y1));
if (w > h * ratio)
h = w / ratio;
else
w = h * ratio;
*y1 = *y2 - dir_y * h;
*x1 = *x2 - dir_x * w;
}
}
static void
gimp_scale_tool_recalc (GimpScaleTool *sc_tool,
GDisplay *gdisp)
{
GimpTransformTool *tr_tool;
gint x1, y1, x2, y2;
gint diffx, diffy;
gint cx, cy;
gdouble scalex, scaley;
tr_tool = GIMP_TRANSFORM_TOOL (sc_tool);
x1 = (int) tr_tool->trans_info [X0];
y1 = (int) tr_tool->trans_info [Y0];
x2 = (int) tr_tool->trans_info [X1];
y2 = (int) tr_tool->trans_info [Y1];
scalex = scaley = 1.0;
if (tr_tool->x2 - tr_tool->x1)
scalex = (double) (x2 - x1) / (double) (tr_tool->x2 - tr_tool->x1);
if (tr_tool->y2 - tr_tool->y1)
scaley = (double) (y2 - y1) / (double) (tr_tool->y2 - tr_tool->y1);
switch (tr_tool->function)
{
case TRANSFORM_HANDLE_1:
cx = x2; cy = y2;
diffx = x2 - tr_tool->x2;
diffy = y2 - tr_tool->y2;
break;
case TRANSFORM_HANDLE_2:
cx = x1; cy = y2;
diffx = x1 - tr_tool->x1;
diffy = y2 - tr_tool->y2;
break;
case TRANSFORM_HANDLE_3:
cx = x2; cy = y1;
diffx = x2 - tr_tool->x2;
diffy = y1 - tr_tool->y1;
break;
case TRANSFORM_HANDLE_4:
cx = x1; cy = y1;
diffx = x1 - tr_tool->x1;
diffy = y1 - tr_tool->y1;
break;
case TRANSFORM_HANDLE_CENTER:
cx = x1; cy = y1;
diffx = diffy = 0;
break;
default:
cx = x1; cy = y1;
diffx = diffy = 0;
break;
}
/* assemble the transformation matrix */
gimp_matrix3_identity (tr_tool->transform);
gimp_matrix3_translate (tr_tool->transform,
(double) -cx + diffx, (double) -cy + diffy);
gimp_matrix3_scale (tr_tool->transform, scalex, scaley);
gimp_matrix3_translate (tr_tool->transform, (double) cx, (double) cy);
/* transform the bounding box */
gimp_transform_tool_transform_bounding_box (tr_tool);
/* update the information dialog */
gimp_scale_tool_info_update (sc_tool);
}
TileManager *
gimp_scale_tool_scale (GimpImage *gimage,
GimpDrawable *drawable,
GDisplay *gdisp,
gdouble *trans_info,
TileManager *float_tiles,
gboolean interpolation,
GimpMatrix3 matrix)
{
GimpProgress *progress;
TileManager *ret;
progress = progress_start (gdisp, _("Scaling..."), FALSE, NULL, NULL);
ret = gimp_transform_tool_do (gimage, drawable, float_tiles,
interpolation, matrix,
progress ? progress_update_and_flush :
(GimpProgressFunc) NULL,
progress);
if (progress)
progress_end (progress);
return ret;
}
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