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gimp/app/widgets/gimpbrusheditor.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpbrusheditor.c
* Copyright 1998 Jay Cox <jaycox@earthlink.net>
*
* 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 <string.h>
#ifdef __GNUC__
#warning GTK_DISABLE_DEPRECATED
#endif
#undef GTK_DISABLE_DEPRECATED
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "widgets-types.h"
#include "base/temp-buf.h"
#include "core/gimpbrushgenerated.h"
#include "gimpbrusheditor.h"
#include "libgimp/gimpintl.h"
/* local function prototypes */
static void gimp_brush_editor_class_init (GimpBrushEditorClass *klass);
static void gimp_brush_editor_init (GimpBrushEditor *editor);
static void gimp_brush_editor_set_data (GimpDataEditor *editor,
GimpData *data);
static void gimp_brush_editor_update_brush (GtkAdjustment *adjustment,
GimpBrushEditor *editor);
static void gimp_brush_editor_preview_resize (GtkWidget *widget,
GtkAllocation *allocation,
GimpBrushEditor *editor);
static void gimp_brush_editor_clear_preview (GimpBrushEditor *editor);
static void gimp_brush_editor_brush_dirty (GimpBrush *brush,
GimpBrushEditor *editor);
static GimpDataEditorClass *parent_class = NULL;
GType
gimp_brush_editor_get_type (void)
{
static GType type = 0;
if (! type)
{
static const GTypeInfo info =
{
sizeof (GimpBrushEditorClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gimp_brush_editor_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpBrushEditor),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_brush_editor_init,
};
type = g_type_register_static (GIMP_TYPE_DATA_EDITOR,
"GimpBrushEditor",
&info, 0);
}
return type;
}
static void
gimp_brush_editor_class_init (GimpBrushEditorClass *klass)
{
GimpDataEditorClass *editor_class;
editor_class = GIMP_DATA_EDITOR_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
editor_class->set_data = gimp_brush_editor_set_data;
}
static void
gimp_brush_editor_init (GimpBrushEditor *editor)
{
/* brush's preview widget w/frame */
editor->frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (editor->frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (editor), editor->frame,
TRUE, TRUE, 0);
gtk_widget_show (editor->frame);
editor->preview = gtk_preview_new (GTK_PREVIEW_GRAYSCALE);
gtk_preview_size (GTK_PREVIEW (editor->preview), 125, 100);
/* Enable auto-resizing of the preview but ensure a minimal size */
gtk_widget_set_size_request (editor->preview, 125, 100);
gtk_preview_set_expand (GTK_PREVIEW (editor->preview), TRUE);
gtk_container_add (GTK_CONTAINER (editor->frame), editor->preview);
gtk_widget_show (editor->preview);
g_signal_connect_after (G_OBJECT (editor->frame), "size_allocate",
G_CALLBACK (gimp_brush_editor_preview_resize),
editor);
/* table for sliders/labels */
editor->scale_label = gtk_label_new ("-1:1");
gtk_box_pack_start (GTK_BOX (editor), editor->scale_label, FALSE, FALSE, 0);
gtk_widget_show (editor->scale_label);
editor->scale = -1;
/* table for sliders/labels */
editor->options_table = gtk_table_new (4, 3, FALSE);
gtk_table_set_row_spacings (GTK_TABLE (editor->options_table), 2);
gtk_table_set_col_spacings (GTK_TABLE (editor->options_table), 2);
gtk_box_pack_start (GTK_BOX (editor), editor->options_table, FALSE, FALSE, 0);
gtk_widget_show (editor->options_table);
/* brush radius scale */
editor->radius_data =
GTK_ADJUSTMENT (gimp_scale_entry_new (GTK_TABLE (editor->options_table),
0, 0,
_("Radius:"), -1, 50,
0.0, 1.0, 100.0, 0.1, 1.0, 1,
TRUE, 0.0, 0.0,
NULL, NULL));
g_signal_connect (G_OBJECT (editor->radius_data), "value_changed",
G_CALLBACK (gimp_brush_editor_update_brush),
editor);
/* brush hardness scale */
editor->hardness_data =
GTK_ADJUSTMENT (gimp_scale_entry_new (GTK_TABLE (editor->options_table),
0, 1,
_("Hardness:"), -1, 50,
0.0, 0.0, 1.0, 0.01, 0.1, 2,
TRUE, 0.0, 0.0,
NULL, NULL));
g_signal_connect (G_OBJECT (editor->hardness_data), "value_changed",
G_CALLBACK (gimp_brush_editor_update_brush),
editor);
/* brush aspect ratio scale */
editor->aspect_ratio_data =
GTK_ADJUSTMENT (gimp_scale_entry_new (GTK_TABLE (editor->options_table),
0, 2,
_("Aspect Ratio:"), -1, 50,
0.0, 1.0, 20.0, 0.1, 1.0, 1,
TRUE, 0.0, 0.0,
NULL, NULL));
g_signal_connect (G_OBJECT (editor->aspect_ratio_data),"value_changed",
G_CALLBACK (gimp_brush_editor_update_brush),
editor);
/* brush angle scale */
editor->angle_data =
GTK_ADJUSTMENT (gimp_scale_entry_new (GTK_TABLE (editor->options_table),
0, 3,
_("Angle:"), -1, 50,
0.0, 0.0, 180.0, 0.1, 1.0, 1,
TRUE, 0.0, 0.0,
NULL, NULL));
g_signal_connect (G_OBJECT (editor->angle_data), "value_changed",
G_CALLBACK (gimp_brush_editor_update_brush),
editor);
}
static void
gimp_brush_editor_set_data (GimpDataEditor *editor,
GimpData *data)
{
GimpBrushEditor *brush_editor;
brush_editor = GIMP_BRUSH_EDITOR (editor);
if (editor->data)
{
g_signal_handlers_disconnect_by_func (G_OBJECT (editor->data),
gimp_brush_editor_brush_dirty,
editor);
}
GIMP_DATA_EDITOR_CLASS (parent_class)->set_data (editor, data);
if (editor->data)
{
gdouble radius = 0.0;
gdouble hardness = 0.0;
gdouble angle = 0.0;
gdouble ratio = 0.0;
g_signal_connect (G_OBJECT (editor->data), "invalidate_preview",
G_CALLBACK (gimp_brush_editor_brush_dirty),
editor);
if (GIMP_IS_BRUSH_GENERATED (editor->data))
{
GimpBrushGenerated *brush;
brush = GIMP_BRUSH_GENERATED (editor->data);
radius = gimp_brush_generated_get_radius (brush);
hardness = gimp_brush_generated_get_hardness (brush);
angle = gimp_brush_generated_get_angle (brush);
ratio = gimp_brush_generated_get_aspect_ratio (brush);
gtk_widget_set_sensitive (brush_editor->options_table, TRUE);
}
else
{
gtk_widget_set_sensitive (brush_editor->options_table, FALSE);
}
gtk_adjustment_set_value (brush_editor->radius_data, radius);
gtk_adjustment_set_value (brush_editor->hardness_data, hardness);
gtk_adjustment_set_value (brush_editor->angle_data, angle);
gtk_adjustment_set_value (brush_editor->aspect_ratio_data, ratio);
gimp_brush_editor_brush_dirty (GIMP_BRUSH (editor->data), brush_editor);
}
}
/* public functions */
GimpDataEditor *
gimp_brush_editor_new (Gimp *gimp)
{
GimpBrushEditor *brush_editor;
brush_editor = g_object_new (GIMP_TYPE_BRUSH_EDITOR, NULL);
gimp_data_editor_construct (GIMP_DATA_EDITOR (brush_editor),
gimp,
GIMP_TYPE_BRUSH);
return GIMP_DATA_EDITOR (brush_editor);
}
/* private functions */
static void
gimp_brush_editor_update_brush (GtkAdjustment *adjustment,
GimpBrushEditor *editor)
{
GimpBrushGenerated *brush = NULL;
if (GIMP_IS_BRUSH_GENERATED (GIMP_DATA_EDITOR (editor)->data))
brush = GIMP_BRUSH_GENERATED (GIMP_DATA_EDITOR (editor)->data);
if (brush &&
((editor->radius_data->value
!= gimp_brush_generated_get_radius (brush))
|| (editor->hardness_data->value
!= gimp_brush_generated_get_hardness (brush))
|| (editor->aspect_ratio_data->value
!= gimp_brush_generated_get_aspect_ratio (brush))
|| (editor->angle_data->value
!= gimp_brush_generated_get_angle (brush))))
{
gimp_brush_generated_freeze (brush);
gimp_brush_generated_set_radius (brush,
editor->radius_data->value);
gimp_brush_generated_set_hardness (brush,
editor->hardness_data->value);
gimp_brush_generated_set_aspect_ratio (brush,
editor->aspect_ratio_data->value);
gimp_brush_generated_set_angle (brush,
editor->angle_data->value);
gimp_brush_generated_thaw (brush);
}
}
static void
gimp_brush_editor_preview_resize (GtkWidget *widget,
GtkAllocation *allocation,
GimpBrushEditor *editor)
{
if (GIMP_DATA_EDITOR (editor)->data)
gimp_brush_editor_brush_dirty (GIMP_BRUSH (GIMP_DATA_EDITOR (editor)->data),
editor);
}
static void
gimp_brush_editor_clear_preview (GimpBrushEditor *editor)
{
guchar *buf;
gint i;
buf = g_new (guchar, editor->preview->allocation.width);
/* Set the buffer to white */
memset (buf, 255, editor->preview->allocation.width);
/* Set the image buffer to white */
for (i = 0; i < editor->preview->allocation.height; i++)
gtk_preview_draw_row (GTK_PREVIEW (editor->preview), buf, 0, i,
editor->preview->allocation.width);
g_free (buf);
}
static void
gimp_brush_editor_brush_dirty (GimpBrush *brush,
GimpBrushEditor *editor)
{
gint x, y, width, yend, ystart, xo;
gint scale;
guchar *src, *buf;
gimp_brush_editor_clear_preview (editor);
if (! (brush && brush->mask))
return;
scale = MAX (ceil (brush->mask->width/
(float) editor->preview->allocation.width),
ceil (brush->mask->height/
(float) editor->preview->allocation.height));
ystart = 0;
xo = editor->preview->allocation.width / 2 - brush->mask->width / (2 * scale);
ystart = editor->preview->allocation.height / 2 - brush->mask->height / (2 * scale);
yend = ystart + brush->mask->height / scale;
width = CLAMP (brush->mask->width/scale, 0, editor->preview->allocation.width);
buf = g_new (guchar, width);
src = (guchar *) temp_buf_data (brush->mask);
for (y = ystart; y < yend; y++)
{
/* Invert the mask for display.
*/
for (x = 0; x < width; x++)
buf[x] = 255 - src[x * scale];
gtk_preview_draw_row (GTK_PREVIEW (editor->preview), buf,
xo, y, width);
src += brush->mask->width * scale;
}
g_free (buf);
if (editor->scale != scale)
{
gchar str[255];
editor->scale = scale;
g_snprintf (str, sizeof (str), "%d:1", scale);
gtk_label_set_text (GTK_LABEL (editor->scale_label), str);
}
gtk_widget_queue_draw (editor->preview);
}
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