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gimp/app/core/gimpbuffer.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 <glib-object.h>
#include "libgimpmath/gimpmath.h"
#include "core-types.h"
#include "base/pixel-region.h"
#include "base/tile-manager.h"
#include "base/temp-buf.h"
#include "paint-funcs/paint-funcs.h"
#include "gimpbuffer.h"
static void gimp_buffer_class_init (GimpBufferClass *klass);
static void gimp_buffer_init (GimpBuffer *buffer);
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 TempBuf * gimp_buffer_get_new_preview (GimpViewable *viewable,
gint width,
gint height);
static gchar * gimp_buffer_get_description (GimpViewable *viewable,
gchar **tooltip);
static GimpViewableClass *parent_class = NULL;
GType
gimp_buffer_get_type (void)
{
static GType buffer_type = 0;
if (! buffer_type)
{
static const GTypeInfo buffer_info =
{
sizeof (GimpBufferClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_buffer_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpBuffer),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_buffer_init,
};
buffer_type = g_type_register_static (GIMP_TYPE_VIEWABLE,
"GimpBuffer",
&buffer_info, 0);
}
return buffer_type;
}
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);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_buffer_finalize;
gimp_object_class->get_memsize = gimp_buffer_get_memsize;
viewable_class->default_stock_id = "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)
{
buffer->tiles = NULL;
}
static void
gimp_buffer_finalize (GObject *object)
{
GimpBuffer *buffer = GIMP_BUFFER (object);
if (buffer->tiles)
{
tile_manager_unref (buffer->tiles);
buffer->tiles = 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;
if (buffer->tiles)
memsize += tile_manager_get_memsize (buffer->tiles, FALSE);
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 TempBuf *
gimp_buffer_get_new_preview (GimpViewable *viewable,
gint width,
gint height)
{
GimpBuffer *buffer = GIMP_BUFFER (viewable);
TempBuf *temp_buf;
gint buffer_width;
gint buffer_height;
PixelRegion srcPR;
PixelRegion destPR;
gint bytes;
buffer_width = tile_manager_width (buffer->tiles);
buffer_height = tile_manager_height (buffer->tiles);
bytes = tile_manager_bpp (buffer->tiles);
pixel_region_init (&srcPR, buffer->tiles,
0, 0,
buffer_width,
buffer_height,
FALSE);
if (buffer_height > height || buffer_width > width)
temp_buf = temp_buf_new (width, height, bytes, 0, 0, NULL);
else
temp_buf = temp_buf_new (buffer_width, buffer_height, bytes, 0, 0, NULL);
destPR.bytes = temp_buf->bytes;
destPR.x = 0;
destPR.y = 0;
destPR.w = temp_buf->width;
destPR.h = temp_buf->height;
destPR.rowstride = temp_buf->width * destPR.bytes;
destPR.data = temp_buf_data (temp_buf);
if (buffer_height > height || buffer_width > width)
{
gint subsample;
/* calculate 'acceptable' subsample */
subsample = 1;
while ((width * (subsample + 1) * 2 < buffer_width) &&
(height * (subsample + 1) * 2 < buffer_height))
subsample += 1;
subsample_region (&srcPR, &destPR, subsample);
}
else
{
copy_region (&srcPR, &destPR);
}
return temp_buf;
}
static gchar *
gimp_buffer_get_description (GimpViewable *viewable,
gchar **tooltip)
{
GimpBuffer *buffer = GIMP_BUFFER (viewable);
if (tooltip)
*tooltip = NULL;
return g_strdup_printf ("%s (%d x %d)",
GIMP_OBJECT (buffer)->name,
gimp_buffer_get_width (buffer),
gimp_buffer_get_height (buffer));
}
GimpBuffer *
gimp_buffer_new (TileManager *tiles,
const gchar *name,
gboolean copy_pixels)
{
GimpBuffer *buffer;
gint width, height;
g_return_val_if_fail (tiles != NULL, NULL);
g_return_val_if_fail (name != NULL, NULL);
width = tile_manager_width (tiles);
height = tile_manager_height (tiles);
buffer = g_object_new (GIMP_TYPE_BUFFER, NULL);
gimp_object_set_name (GIMP_OBJECT (buffer), name);
if (copy_pixels)
{
PixelRegion srcPR, destPR;
buffer->tiles = tile_manager_new (width, height,
tile_manager_bpp (tiles));
pixel_region_init (&srcPR, tiles, 0, 0, width, height, FALSE);
pixel_region_init (&destPR, buffer->tiles, 0, 0, width, height, TRUE);
copy_region (&srcPR, &destPR);
}
else
{
buffer->tiles = tiles;
}
return buffer;
}
GimpBuffer *
gimp_buffer_new_from_pixbuf (GdkPixbuf *pixbuf,
const gchar *name)
{
TileManager *tiles;
guchar *pixels;
PixelRegion destPR;
gint width;
gint height;
gint rowstride;
gint channels;
gint y;
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
g_return_val_if_fail (name != NULL, NULL);
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
channels = gdk_pixbuf_get_n_channels (pixbuf);
tiles = tile_manager_new (width, height, channels);
pixel_region_init (&destPR, tiles, 0, 0, width, height, TRUE);
for (y = 0, pixels = gdk_pixbuf_get_pixels (pixbuf);
y < height;
y++, pixels += rowstride)
{
pixel_region_set_row (&destPR, 0, y, width, pixels);
}
return gimp_buffer_new (tiles, name, FALSE);
}
gint
gimp_buffer_get_width (const GimpBuffer *buffer)
{
g_return_val_if_fail (GIMP_IS_BUFFER (buffer), 0);
return tile_manager_width (buffer->tiles);
}
gint
gimp_buffer_get_height (const GimpBuffer *buffer)
{
g_return_val_if_fail (GIMP_IS_BUFFER (buffer), 0);
return tile_manager_height (buffer->tiles);
}
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