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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 "gui/gui-types.h"
#include "core/gimpimage.h"
#include "core/gimpdrawable-transform.h"
#include "core/gimpdrawable-transform-utils.h"
#include "core/gimptoolinfo.h"
#include "display/gimpdisplay.h"
#include "gui/info-dialog.h"
#include "gimpscaletool.h"
#include "transform_options.h"
#include "libgimp/gimpintl.h"
/* local function prototypes */
static void gimp_scale_tool_class_init (GimpScaleToolClass *klass);
static void gimp_scale_tool_init (GimpScaleTool *sc_tool);
static TileManager * gimp_scale_tool_transform (GimpTransformTool *tr_tool,
GimpDisplay *gdisp,
TransformState state);
static void gimp_scale_tool_recalc (GimpTransformTool *tr_tool,
GimpDisplay *gdisp);
static void gimp_scale_tool_motion (GimpTransformTool *tr_tool,
GimpDisplay *gdisp);
static void gimp_scale_tool_info_update (GimpTransformTool *tr_tool);
static void gimp_scale_tool_size_changed (GtkWidget *widget,
gpointer data);
static void gimp_scale_tool_unit_changed (GtkWidget *widget,
gpointer data);
/* 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;
/* public functions */
void
gimp_scale_tool_register (Gimp *gimp,
GimpToolRegisterCallback callback)
{
(* callback) (gimp,
GIMP_TYPE_SCALE_TOOL,
transform_options_new,
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)
{
static const GTypeInfo tool_info =
{
sizeof (GimpScaleToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_scale_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpScaleTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_scale_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_TRANSFORM_TOOL,
"GimpScaleTool",
&tool_info, 0);
}
return tool_type;
}
/* private functions */
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 *scale_tool)
{
GimpTool *tool;
tool = GIMP_TOOL (scale_tool);
tool->tool_cursor = GIMP_RESIZE_TOOL_CURSOR;
}
static TileManager *
gimp_scale_tool_transform (GimpTransformTool *transform_tool,
GimpDisplay *gdisp,
TransformState state)
{
switch (state)
{
case TRANSFORM_INIT:
size_vals[0] = transform_tool->x2 - transform_tool->x1;
size_vals[1] = transform_tool->y2 - transform_tool->y1;
if (! transform_tool->info_dialog)
{
GtkWidget *spinbutton;
transform_tool->info_dialog =
info_dialog_new (_("Scaling Information"),
gimp_standard_help_func,
"tools/transform_scale.html");
gimp_transform_tool_info_dialog_connect (transform_tool,
GIMP_STOCK_TOOL_SCALE);
info_dialog_add_label (transform_tool->info_dialog,
_("Original Width:"),
orig_width_buf);
info_dialog_add_label (transform_tool->info_dialog,
_("Height:"),
orig_height_buf);
spinbutton =
info_dialog_add_spinbutton (transform_tool->info_dialog,
_("Current Width:"),
NULL, -1, 1, 1, 10, 1, 1, 2, NULL, NULL);
sizeentry =
info_dialog_add_sizeentry (transform_tool->info_dialog,
_("Height:"),
size_vals, 1,
gdisp->gimage->unit, "%a",
TRUE, TRUE, FALSE,
GIMP_SIZE_ENTRY_UPDATE_SIZE,
G_CALLBACK (gimp_scale_tool_size_changed),
transform_tool);
g_signal_connect (G_OBJECT (sizeentry), "unit_changed",
G_CALLBACK (gimp_scale_tool_unit_changed),
transform_tool);
gimp_size_entry_add_field (GIMP_SIZE_ENTRY (sizeentry),
GTK_SPIN_BUTTON (spinbutton), NULL);
info_dialog_add_label (transform_tool->info_dialog,
_("Scale Ratio X:"),
x_ratio_buf);
info_dialog_add_label (transform_tool->info_dialog,
_("Y:"),
y_ratio_buf);
gtk_table_set_row_spacing
(GTK_TABLE (transform_tool->info_dialog->info_table), 1, 4);
gtk_table_set_row_spacing
(GTK_TABLE (transform_tool->info_dialog->info_table), 2, 0);
}
g_signal_handlers_block_by_func (G_OBJECT (sizeentry),
gimp_scale_tool_size_changed,
transform_tool);
g_signal_handlers_block_by_func (G_OBJECT (sizeentry),
gimp_scale_tool_unit_changed,
transform_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]);
g_signal_handlers_unblock_by_func (G_OBJECT (sizeentry),
gimp_scale_tool_size_changed,
transform_tool);
g_signal_handlers_unblock_by_func (G_OBJECT (sizeentry),
gimp_scale_tool_unit_changed,
transform_tool);
gtk_widget_set_sensitive (GTK_WIDGET (transform_tool->info_dialog->shell),
TRUE);
transform_tool->trans_info[X0] = (gdouble) transform_tool->x1;
transform_tool->trans_info[Y0] = (gdouble) transform_tool->y1;
transform_tool->trans_info[X1] = (gdouble) transform_tool->x2;
transform_tool->trans_info[Y1] = (gdouble) transform_tool->y2;
break;
case TRANSFORM_MOTION:
gimp_scale_tool_motion (transform_tool, gdisp);
gimp_scale_tool_recalc (transform_tool, gdisp);
break;
case TRANSFORM_RECALC:
gimp_scale_tool_recalc (transform_tool, gdisp);
break;
case TRANSFORM_FINISH:
return gimp_transform_tool_transform_tiles (transform_tool,
_("Scaling..."));
break;
}
return NULL;
}
static void
gimp_scale_tool_info_update (GimpTransformTool *transform_tool)
{
GimpTool *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 (transform_tool);
unit = gimp_size_entry_get_unit (GIMP_SIZE_ENTRY (sizeentry));;
/* Find original sizes */
x1 = transform_tool->x1;
y1 = transform_tool->y1;
x2 = transform_tool->x2;
y2 = transform_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 = (gint) transform_tool->trans_info[X0];
y3 = (gint) transform_tool->trans_info[Y0];
x4 = (gint) transform_tool->trans_info[X1];
y4 = (gint) transform_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, sizeof (x_ratio_buf), "%0.2f", ratio_x);
g_snprintf (y_ratio_buf, sizeof (y_ratio_buf), "%0.2f", ratio_y);
info_dialog_update (transform_tool->info_dialog);
info_dialog_popup (transform_tool->info_dialog);
}
static void
gimp_scale_tool_size_changed (GtkWidget *widget,
gpointer data)
{
GimpTransformTool *transform_tool;
GimpTool *tool;
gint width;
gint height;
transform_tool = GIMP_TRANSFORM_TOOL (data);
tool = GIMP_TOOL (data);
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 != (transform_tool->trans_info[X1] -
transform_tool->trans_info[X0])) ||
(height != (transform_tool->trans_info[Y1] -
transform_tool->trans_info[Y0])))
{
gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
transform_tool->trans_info[X1] = transform_tool->trans_info[X0] + width;
transform_tool->trans_info[Y1] = transform_tool->trans_info[Y0] + height;
gimp_scale_tool_recalc (transform_tool, tool->gdisp);
gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}
}
static void
gimp_scale_tool_unit_changed (GtkWidget *widget,
gpointer data)
{
gimp_scale_tool_info_update (GIMP_TRANSFORM_TOOL (data));
}
static void
gimp_scale_tool_motion (GimpTransformTool *transform_tool,
GimpDisplay *gdisp)
{
TransformOptions *options;
gdouble ratio;
gdouble *x1;
gdouble *y1;
gdouble *x2;
gdouble *y2;
gint w, h;
gint dir_x, dir_y;
gdouble diff_x, diff_y;
options = (TransformOptions *) GIMP_TOOL (transform_tool)->tool_info->tool_options;
diff_x = transform_tool->curx - transform_tool->lastx;
diff_y = transform_tool->cury - transform_tool->lasty;
switch (transform_tool->function)
{
case TRANSFORM_HANDLE_1:
x1 = &transform_tool->trans_info[X0];
y1 = &transform_tool->trans_info[Y0];
x2 = &transform_tool->trans_info[X1];
y2 = &transform_tool->trans_info[Y1];
dir_x = dir_y = 1;
break;
case TRANSFORM_HANDLE_2:
x1 = &transform_tool->trans_info[X1];
y1 = &transform_tool->trans_info[Y0];
x2 = &transform_tool->trans_info[X0];
y2 = &transform_tool->trans_info[Y1];
dir_x = -1;
dir_y = 1;
break;
case TRANSFORM_HANDLE_3:
x1 = &transform_tool->trans_info[X0];
y1 = &transform_tool->trans_info[Y1];
x2 = &transform_tool->trans_info[X1];
y2 = &transform_tool->trans_info[Y0];
dir_x = 1;
dir_y = -1;
break;
case TRANSFORM_HANDLE_4:
x1 = &transform_tool->trans_info[X1];
y1 = &transform_tool->trans_info[Y1];
x2 = &transform_tool->trans_info[X0];
y2 = &transform_tool->trans_info[Y0];
dir_x = dir_y = -1;
break;
case TRANSFORM_HANDLE_CENTER:
transform_tool->trans_info[X0] += diff_x;
transform_tool->trans_info[Y0] += diff_y;
transform_tool->trans_info[X1] += diff_x;
transform_tool->trans_info[Y1] += diff_y;
transform_tool->trans_info[X2] += diff_x;
transform_tool->trans_info[Y2] += diff_y;
transform_tool->trans_info[X3] += diff_x;
transform_tool->trans_info[Y3] += diff_y;
return;
default:
return;
}
/* if just the mod1 key is down, affect only the height */
if (options->constrain_2 && ! options->constrain_1)
{
diff_x = 0;
}
/* if just the control key is down, affect only the width */
else if (options->constrain_1 && ! options->constrain_2)
{
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 (options->constrain_1 && options->constrain_2)
{
ratio = ((gdouble) (transform_tool->x2 - transform_tool->x1) /
(gdouble) (transform_tool->y2 - transform_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 (GimpTransformTool *transform_tool,
GimpDisplay *gdisp)
{
gimp_drawable_transform_matrix_scale (transform_tool->x1,
transform_tool->y1,
transform_tool->x2,
transform_tool->y2,
transform_tool->trans_info[X0],
transform_tool->trans_info[Y0],
transform_tool->trans_info[X1],
transform_tool->trans_info[Y1],
transform_tool->transform);
/* transform the bounding box */
gimp_transform_tool_transform_bounding_box (transform_tool);
/* update the information dialog */
gimp_scale_tool_info_update (transform_tool);
}
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