gimp/app/widgets/gimprender.c

198 lines
5.1 KiB
C
Raw Normal View History

/* GIMP - The GNU 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "widgets-types.h"
#include "core/gimp.h"
#include "core/gimpviewable.h"
#include "gimprender.h"
static void gimp_render_setup_notify (gpointer config,
GParamSpec *param_spec,
Gimp *gimp);
/* accelerate blending on the checkerboard */
guchar *gimp_render_check_buf = NULL;
guchar *gimp_render_empty_buf = NULL;
guchar *gimp_render_white_buf = NULL;
guchar *gimp_render_blend_dark_check = NULL;
guchar *gimp_render_blend_light_check = NULL;
guchar *gimp_render_blend_white = NULL;
static GimpRGB light;
static GimpRGB dark;
void
gimp_render_init (Gimp *gimp)
{
g_return_if_fail (GIMP_IS_GIMP (gimp));
g_signal_connect (gimp->config, "notify::transparency-type",
G_CALLBACK (gimp_render_setup_notify),
gimp);
gimp_render_setup_notify (gimp->config, NULL, gimp);
}
void
gimp_render_exit (Gimp *gimp)
{
g_return_if_fail (GIMP_IS_GIMP (gimp));
g_signal_handlers_disconnect_by_func (gimp->config,
gimp_render_setup_notify,
gimp);
if (gimp_render_blend_dark_check)
{
g_free (gimp_render_blend_dark_check);
gimp_render_blend_dark_check = NULL;
}
if (gimp_render_blend_light_check)
{
g_free (gimp_render_blend_light_check);
gimp_render_blend_light_check = NULL;
}
if (gimp_render_blend_white)
{
g_free (gimp_render_blend_white);
gimp_render_blend_white = NULL;
}
if (gimp_render_check_buf)
{
g_free (gimp_render_check_buf);
gimp_render_check_buf = NULL;
}
if (gimp_render_empty_buf)
{
g_free (gimp_render_empty_buf);
gimp_render_empty_buf = NULL;
}
if (gimp_render_white_buf)
{
g_free (gimp_render_white_buf);
gimp_render_white_buf = NULL;
}
}
const GimpRGB *
gimp_render_light_check_color (void)
{
return &light;
}
const GimpRGB *
gimp_render_dark_check_color (void)
{
return &dark;
}
static void
gimp_render_setup_notify (gpointer config,
GParamSpec *param_spec,
Gimp *gimp)
{
GimpCheckType check_type;
guchar dark_check;
guchar light_check;
gint i, j;
g_object_get (config,
"transparency-type", &check_type,
NULL);
gimp_checks_get_shades (check_type, &light_check, &dark_check);
gimp_rgba_set_uchar (&light, light_check, light_check, light_check, 255);
gimp_rgba_set_uchar (&dark, dark_check, dark_check, dark_check, 255);
if (! gimp_render_blend_dark_check)
gimp_render_blend_dark_check = g_new (guchar, 65536);
if (! gimp_render_blend_light_check)
gimp_render_blend_light_check = g_new (guchar, 65536);
if (! gimp_render_blend_white)
gimp_render_blend_white = g_new (guchar, 65536);
for (i = 0; i < 256; i++)
for (j = 0; j < 256; j++)
{
gimp_render_blend_dark_check [(i << 8) + j] =
(guchar) ((j * i + dark_check * (255 - i)) / 255);
gimp_render_blend_light_check [(i << 8) + j] =
(guchar) ((j * i + light_check * (255 - i)) / 255);
gimp_render_blend_white [(i << 8) + j] =
(guchar) ((j * i + 255 * (255 - i)) / 255);
}
g_free (gimp_render_check_buf);
g_free (gimp_render_empty_buf);
g_free (gimp_render_white_buf);
#define BUF_SIZE (GIMP_VIEWABLE_MAX_PREVIEW_SIZE + 4)
gimp_render_check_buf = g_new (guchar, BUF_SIZE * 3);
gimp_render_empty_buf = g_new0 (guchar, BUF_SIZE * 3);
gimp_render_white_buf = g_new (guchar, BUF_SIZE * 3);
/* calculate check buffer for previews */
memset (gimp_render_white_buf, 255, BUF_SIZE * 3);
for (i = 0; i < BUF_SIZE; i++)
{
if (i & 0x4)
{
gimp_render_check_buf[i * 3 + 0] = dark_check;
gimp_render_check_buf[i * 3 + 1] = dark_check;
gimp_render_check_buf[i * 3 + 2] = dark_check;
}
else
{
gimp_render_check_buf[i * 3 + 0] = light_check;
gimp_render_check_buf[i * 3 + 1] = light_check;
gimp_render_check_buf[i * 3 + 2] = light_check;
}
}
#undef BUF_SIZE
}