gimp/app/core/gimpbuffer.c

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/* 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 <cairo.h>
#include <gegl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libgimpcolor/gimpcolor.h"
#include "core-types.h"
#include "gegl/gimp-babl.h"
#include "gimp-utils.h"
#include "gimpbuffer.h"
#include "gimpimage.h"
#include "gimptempbuf.h"
static void gimp_buffer_finalize (GObject *object);
static gint64 gimp_buffer_get_memsize (GimpObject *object,
gint64 *gui_size);
static gboolean gimp_buffer_get_size (GimpViewable *viewable,
gint *width,
gint *height);
static void gimp_buffer_get_preview_size (GimpViewable *viewable,
gint size,
gboolean is_popup,
gboolean dot_for_dot,
gint *popup_width,
gint *popup_height);
static gboolean gimp_buffer_get_popup_size (GimpViewable *viewable,
gint width,
gint height,
gboolean dot_for_dot,
gint *popup_width,
gint *popup_height);
static GimpTempBuf * gimp_buffer_get_new_preview (GimpViewable *viewable,
GimpContext *context,
gint width,
gint height);
static gchar * gimp_buffer_get_description (GimpViewable *viewable,
gchar **tooltip);
G_DEFINE_TYPE (GimpBuffer, gimp_buffer, GIMP_TYPE_VIEWABLE)
#define parent_class gimp_buffer_parent_class
static void
gimp_buffer_class_init (GimpBufferClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
object_class->finalize = gimp_buffer_finalize;
gimp_object_class->get_memsize = gimp_buffer_get_memsize;
viewable_class->default_icon_name = "gtk-paste";
viewable_class->get_size = gimp_buffer_get_size;
viewable_class->get_preview_size = gimp_buffer_get_preview_size;
viewable_class->get_popup_size = gimp_buffer_get_popup_size;
viewable_class->get_new_preview = gimp_buffer_get_new_preview;
viewable_class->get_description = gimp_buffer_get_description;
}
static void
gimp_buffer_init (GimpBuffer *buffer)
{
}
static void
gimp_buffer_finalize (GObject *object)
{
GimpBuffer *buffer = GIMP_BUFFER (object);
if (buffer->buffer)
{
g_object_unref (buffer->buffer);
buffer->buffer = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gint64
gimp_buffer_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpBuffer *buffer = GIMP_BUFFER (object);
gint64 memsize = 0;
memsize += gimp_gegl_buffer_get_memsize (buffer->buffer);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static gboolean
gimp_buffer_get_size (GimpViewable *viewable,
gint *width,
gint *height)
{
GimpBuffer *buffer = GIMP_BUFFER (viewable);
*width = gimp_buffer_get_width (buffer);
*height = gimp_buffer_get_height (buffer);
return TRUE;
}
static void
gimp_buffer_get_preview_size (GimpViewable *viewable,
gint size,
gboolean is_popup,
gboolean dot_for_dot,
gint *width,
gint *height)
{
GimpBuffer *buffer = GIMP_BUFFER (viewable);
gimp_viewable_calc_preview_size (gimp_buffer_get_width (buffer),
gimp_buffer_get_height (buffer),
size,
size,
dot_for_dot, 1.0, 1.0,
width,
height,
NULL);
}
static gboolean
gimp_buffer_get_popup_size (GimpViewable *viewable,
gint width,
gint height,
gboolean dot_for_dot,
gint *popup_width,
gint *popup_height)
{
GimpBuffer *buffer;
gint buffer_width;
gint buffer_height;
buffer = GIMP_BUFFER (viewable);
buffer_width = gimp_buffer_get_width (buffer);
buffer_height = gimp_buffer_get_height (buffer);
if (buffer_width > width || buffer_height > height)
{
gboolean scaling_up;
gimp_viewable_calc_preview_size (buffer_width,
buffer_height,
width * 2,
height * 2,
dot_for_dot, 1.0, 1.0,
popup_width,
popup_height,
&scaling_up);
if (scaling_up)
{
*popup_width = buffer_width;
*popup_height = buffer_height;
}
return TRUE;
}
return FALSE;
}
static GimpTempBuf *
gimp_buffer_get_new_preview (GimpViewable *viewable,
GimpContext *context,
gint width,
gint height)
{
GimpBuffer *buffer = GIMP_BUFFER (viewable);
const Babl *format = gimp_buffer_get_format (buffer);
GimpTempBuf *preview;
if (babl_format_is_palette (format))
format = gimp_babl_format (GIMP_RGB, GIMP_PRECISION_U8_GAMMA,
babl_format_has_alpha (format));
else
format = gimp_babl_format (gimp_babl_format_get_base_type (format),
GIMP_PRECISION_U8_GAMMA,
babl_format_has_alpha (format));
preview = gimp_temp_buf_new (width, height, format);
gegl_buffer_get (buffer->buffer, GEGL_RECTANGLE (0, 0, width, height),
MIN ((gdouble) width / (gdouble) gimp_buffer_get_width (buffer),
(gdouble) height / (gdouble) gimp_buffer_get_height (buffer)),
format,
gimp_temp_buf_get_data (preview),
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
return preview;
}
static gchar *
gimp_buffer_get_description (GimpViewable *viewable,
gchar **tooltip)
{
GimpBuffer *buffer = GIMP_BUFFER (viewable);
return g_strdup_printf ("%s (%d × %d)",
gimp_object_get_name (buffer),
gimp_buffer_get_width (buffer),
gimp_buffer_get_height (buffer));
}
GimpBuffer *
gimp_buffer_new (GeglBuffer *buffer,
const gchar *name,
gint offset_x,
gint offset_y,
gboolean copy_pixels)
{
GimpBuffer *gimp_buffer;
g_return_val_if_fail (GEGL_IS_BUFFER (buffer), NULL);
g_return_val_if_fail (name != NULL, NULL);
gimp_buffer = g_object_new (GIMP_TYPE_BUFFER,
"name", name,
NULL);
if (copy_pixels)
gimp_buffer->buffer = gegl_buffer_dup (buffer);
else
gimp_buffer->buffer = g_object_ref (buffer);
gimp_buffer->offset_x = offset_x;
gimp_buffer->offset_y = offset_y;
return gimp_buffer;
}
GimpBuffer *
gimp_buffer_new_from_pixbuf (GdkPixbuf *pixbuf,
const gchar *name,
gint offset_x,
gint offset_y)
{
GimpBuffer *gimp_buffer;
GeglBuffer *buffer;
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
g_return_val_if_fail (name != NULL, NULL);
buffer = gimp_pixbuf_create_buffer (pixbuf);
gimp_buffer = gimp_buffer_new (buffer, name,
offset_x, offset_y, FALSE);
g_object_unref (buffer);
return gimp_buffer;
}
gint
gimp_buffer_get_width (const GimpBuffer *buffer)
{
g_return_val_if_fail (GIMP_IS_BUFFER (buffer), 0);
return gegl_buffer_get_width (buffer->buffer);
}
gint
gimp_buffer_get_height (const GimpBuffer *buffer)
{
g_return_val_if_fail (GIMP_IS_BUFFER (buffer), 0);
return gegl_buffer_get_height (buffer->buffer);
}
const Babl *
gimp_buffer_get_format (const GimpBuffer *buffer)
{
g_return_val_if_fail (GIMP_IS_BUFFER (buffer), NULL);
return gegl_buffer_get_format (buffer->buffer);
}
GeglBuffer *
gimp_buffer_get_buffer (const GimpBuffer *buffer)
{
g_return_val_if_fail (GIMP_IS_BUFFER (buffer), NULL);
return buffer->buffer;
}