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gimp/libgimp/gimpdrawablepreview.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpdrawablepreview.c
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
/* we use our own deprecated API here */
#define GIMP_DISABLE_DEPRECATION_WARNINGS
#include "libgimpwidgets/gimpwidgets.h"
#include "gimpuitypes.h"
#include "gimp.h"
#include "gimpdrawablepreview.h"
/**
* SECTION: gimpdrawablepreview
* @title: GimpDrawablePreview
* @short_description: A widget providing a preview of a #GimpDrawable.
*
* A widget providing a preview of a #GimpDrawable.
**/
#define SELECTION_BORDER 8
enum
{
PROP_0,
PROP_DRAWABLE,
PROP_DRAWABLE_ID
};
typedef struct
{
gint32 drawable_ID;
} GimpDrawablePreviewPrivate;
typedef struct
{
gint x;
gint y;
gboolean update;
} PreviewSettings;
#define GIMP_DRAWABLE_PREVIEW_GET_PRIVATE(obj) \
G_TYPE_INSTANCE_GET_PRIVATE (preview, \
GIMP_TYPE_DRAWABLE_PREVIEW, \
GimpDrawablePreviewPrivate)
static void gimp_drawable_preview_constructed (GObject *object);
static void gimp_drawable_preview_dispose (GObject *object);
static void gimp_drawable_preview_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_drawable_preview_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_drawable_preview_style_set (GtkWidget *widget,
GtkStyle *prev_style);
static void gimp_drawable_preview_draw_original (GimpPreview *preview);
static void gimp_drawable_preview_draw_thumb (GimpPreview *preview,
GimpPreviewArea *area,
gint width,
gint height);
static void gimp_drawable_preview_draw_buffer (GimpPreview *preview,
const guchar *buffer,
gint rowstride);
static void gimp_drawable_preview_set_drawable (GimpDrawablePreview *preview,
GimpDrawable *drawable);
static void gimp_drawable_preview_set_drawable_id
(GimpDrawablePreview *preview,
gint32 drawable_ID);
G_DEFINE_TYPE (GimpDrawablePreview, gimp_drawable_preview,
GIMP_TYPE_SCROLLED_PREVIEW)
#define parent_class gimp_drawable_preview_parent_class
static gint gimp_drawable_preview_counter = 0;
static void
gimp_drawable_preview_class_init (GimpDrawablePreviewClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GimpPreviewClass *preview_class = GIMP_PREVIEW_CLASS (klass);
object_class->constructed = gimp_drawable_preview_constructed;
object_class->dispose = gimp_drawable_preview_dispose;
object_class->get_property = gimp_drawable_preview_get_property;
object_class->set_property = gimp_drawable_preview_set_property;
widget_class->style_set = gimp_drawable_preview_style_set;
preview_class->draw = gimp_drawable_preview_draw_original;
preview_class->draw_thumb = gimp_drawable_preview_draw_thumb;
preview_class->draw_buffer = gimp_drawable_preview_draw_buffer;
g_type_class_add_private (object_class, sizeof (GimpDrawablePreviewPrivate));
/**
* GimpDrawablePreview:drawable:
*
* Deprecated: use the drawable-id property instead.
*
* Since: 2.4
*/
g_object_class_install_property (object_class, PROP_DRAWABLE,
g_param_spec_pointer ("drawable", NULL, NULL,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
/**
* GimpDrawablePreview:drawable-id:
*
* The drawable the #GimpDrawablePreview is attached to.
*
* Since: 2.10
*/
g_object_class_install_property (object_class, PROP_DRAWABLE_ID,
g_param_spec_int ("drawable-id", NULL, NULL,
-1, G_MAXINT, -1,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
}
static void
gimp_drawable_preview_init (GimpDrawablePreview *preview)
{
g_object_set (GIMP_PREVIEW (preview)->area,
"check-size", gimp_check_size (),
"check-type", gimp_check_type (),
NULL);
}
static void
gimp_drawable_preview_constructed (GObject *object)
{
gchar *data_name;
PreviewSettings settings;
G_OBJECT_CLASS (parent_class)->constructed (object);
data_name = g_strdup_printf ("%s-drawable-preview-%d",
g_get_prgname (),
++gimp_drawable_preview_counter);
if (gimp_get_data (data_name, &settings))
{
gimp_preview_set_update (GIMP_PREVIEW (object), settings.update);
gimp_scrolled_preview_set_position (GIMP_SCROLLED_PREVIEW (object),
settings.x, settings.y);
}
g_object_set_data_full (object, "gimp-drawable-preview-data-name",
data_name, (GDestroyNotify) g_free);
}
static void
gimp_drawable_preview_dispose (GObject *object)
{
const gchar *data_name = g_object_get_data (G_OBJECT (object),
"gimp-drawable-preview-data-name");
if (data_name)
{
GimpPreview *preview = GIMP_PREVIEW (object);
PreviewSettings settings;
settings.x = preview->xoff + preview->xmin;
settings.y = preview->yoff + preview->ymin;
settings.update = gimp_preview_get_update (preview);
gimp_set_data (data_name, &settings, sizeof (PreviewSettings));
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gimp_drawable_preview_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpDrawablePreview *preview = GIMP_DRAWABLE_PREVIEW (object);
switch (property_id)
{
case PROP_DRAWABLE:
g_value_set_pointer (value, preview->drawable);
break;
case PROP_DRAWABLE_ID:
g_value_set_int (value,
gimp_drawable_preview_get_drawable_id (preview));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_drawable_preview_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpDrawablePreview *preview = GIMP_DRAWABLE_PREVIEW (object);
GimpDrawablePreviewPrivate *priv = GIMP_DRAWABLE_PREVIEW_GET_PRIVATE (preview);
switch (property_id)
{
case PROP_DRAWABLE:
g_return_if_fail (priv->drawable_ID < 1);
if (g_value_get_pointer (value))
gimp_drawable_preview_set_drawable (preview,
g_value_get_pointer (value));
break;
case PROP_DRAWABLE_ID:
gimp_drawable_preview_set_drawable_id (preview,
g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_drawable_preview_style_set (GtkWidget *widget,
GtkStyle *prev_style)
{
GimpPreview *preview = GIMP_PREVIEW (widget);
gint width = preview->xmax - preview->xmin;
gint height = preview->ymax - preview->ymin;
gint size;
if (GTK_WIDGET_CLASS (parent_class)->style_set)
GTK_WIDGET_CLASS (parent_class)->style_set (widget, prev_style);
gtk_widget_style_get (widget,
"size", &size,
NULL);
gtk_widget_set_size_request (GIMP_PREVIEW (preview)->area,
MIN (width, size), MIN (height, size));
}
static void
gimp_drawable_preview_draw_original (GimpPreview *preview)
{
GimpDrawablePreviewPrivate *priv = GIMP_DRAWABLE_PREVIEW_GET_PRIVATE (preview);
guchar *buffer;
gint width, height;
gint bpp;
GimpImageType type;
if (priv->drawable_ID < 1)
return;
preview->xoff = CLAMP (preview->xoff,
0, preview->xmax - preview->xmin - preview->width);
preview->yoff = CLAMP (preview->yoff,
0, preview->ymax - preview->ymin - preview->height);
width = preview->width;
height = preview->height;
buffer = gimp_drawable_get_sub_thumbnail_data (priv->drawable_ID,
preview->xoff + preview->xmin,
preview->yoff + preview->ymin,
preview->width, preview->height,
&width, &height, &bpp);
switch (bpp)
{
case 1: type = GIMP_GRAY_IMAGE; break;
case 2: type = GIMP_GRAYA_IMAGE; break;
case 3: type = GIMP_RGB_IMAGE; break;
case 4: type = GIMP_RGBA_IMAGE; break;
default:
g_free (buffer);
return;
}
gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview->area),
0, 0, width, height, type, buffer, width * bpp);
g_free (buffer);
}
static void
gimp_drawable_preview_draw_thumb (GimpPreview *preview,
GimpPreviewArea *area,
gint width,
gint height)
{
GimpDrawablePreviewPrivate *priv = GIMP_DRAWABLE_PREVIEW_GET_PRIVATE (preview);
if (priv->drawable_ID > 0)
_gimp_drawable_preview_area_draw_thumb (area, priv->drawable_ID,
width, height);
}
void
_gimp_drawable_preview_area_draw_thumb (GimpPreviewArea *area,
gint32 drawable_ID,
gint width,
gint height)
{
guchar *buffer;
gint x1, y1, x2, y2;
gint bpp;
gint size = 100;
gint nav_width, nav_height;
g_return_if_fail (GIMP_IS_PREVIEW_AREA (area));
g_return_if_fail (gimp_item_is_valid (drawable_ID));
g_return_if_fail (gimp_item_is_drawable (drawable_ID));
if (_gimp_drawable_preview_get_bounds (drawable_ID, &x1, &y1, &x2, &y2))
{
width = x2 - x1;
height = y2 - y1;
}
else
{
width = gimp_drawable_width (drawable_ID);
height = gimp_drawable_height (drawable_ID);
}
if (width > height)
{
nav_width = MIN (width, size);
nav_height = (height * nav_width) / width;
}
else
{
nav_height = MIN (height, size);
nav_width = (width * nav_height) / height;
}
if (_gimp_drawable_preview_get_bounds (drawable_ID, &x1, &y1, &x2, &y2))
{
buffer = gimp_drawable_get_sub_thumbnail_data (drawable_ID,
x1, y1, x2 - x1, y2 - y1,
&nav_width, &nav_height,
&bpp);
}
else
{
buffer = gimp_drawable_get_thumbnail_data (drawable_ID,
&nav_width, &nav_height,
&bpp);
}
if (buffer)
{
GimpImageType type;
gtk_widget_set_size_request (GTK_WIDGET (area), nav_width, nav_height);
gtk_widget_show (GTK_WIDGET (area));
gtk_widget_realize (GTK_WIDGET (area));
switch (bpp)
{
case 1: type = GIMP_GRAY_IMAGE; break;
case 2: type = GIMP_GRAYA_IMAGE; break;
case 3: type = GIMP_RGB_IMAGE; break;
case 4: type = GIMP_RGBA_IMAGE; break;
default:
g_free (buffer);
return;
}
gimp_preview_area_draw (area,
0, 0, nav_width, nav_height,
type, buffer, bpp * nav_width);
g_free (buffer);
}
}
static void
gimp_drawable_preview_draw_area (GimpDrawablePreview *preview,
gint x,
gint y,
gint width,
gint height,
const guchar *buf,
gint rowstride)
{
GimpDrawablePreviewPrivate *priv = GIMP_DRAWABLE_PREVIEW_GET_PRIVATE (preview);
GimpPreview *gimp_preview = GIMP_PREVIEW (preview);
gint32 image_ID;
image_ID = gimp_item_get_image (priv->drawable_ID);
if (gimp_selection_is_empty (image_ID))
{
gimp_preview_area_draw (GIMP_PREVIEW_AREA (gimp_preview->area),
x - gimp_preview->xoff - gimp_preview->xmin,
y - gimp_preview->yoff - gimp_preview->ymin,
width,
height,
gimp_drawable_type (priv->drawable_ID),
buf, rowstride);
}
else
{
gint offset_x, offset_y;
gint mask_x, mask_y;
gint mask_width, mask_height;
gint draw_x, draw_y;
gint draw_width, draw_height;
gimp_drawable_offsets (priv->drawable_ID, &offset_x, &offset_y);
if (gimp_drawable_mask_intersect (priv->drawable_ID,
&mask_x, &mask_y,
&mask_width, &mask_height) &&
gimp_rectangle_intersect (mask_x, mask_y,
mask_width, mask_height,
x, y, width, height,
&draw_x, &draw_y,
&draw_width, &draw_height))
{
GimpImageType type;
gint32 selection_ID;
guchar *src;
guchar *sel;
gint d_w, d_h, d_bpp;
gint s_w, s_h, s_bpp;
d_w = draw_width;
d_h = draw_height;
s_w = draw_width;
s_h = draw_height;
selection_ID = gimp_image_get_selection (image_ID);
src = gimp_drawable_get_sub_thumbnail_data (priv->drawable_ID,
draw_x, draw_y,
draw_width, draw_height,
&d_w, &d_h,
&d_bpp);
sel = gimp_drawable_get_sub_thumbnail_data (selection_ID,
draw_x + offset_x,
draw_y + offset_y,
draw_width, draw_height,
&s_w, &s_h,
&s_bpp);
switch (d_bpp)
{
case 1: type = GIMP_GRAY_IMAGE; break;
case 2: type = GIMP_GRAYA_IMAGE; break;
case 3: type = GIMP_RGB_IMAGE; break;
case 4: type = GIMP_RGBA_IMAGE; break;
default:
g_free (sel);
g_free (src);
return;
}
gimp_preview_area_mask (GIMP_PREVIEW_AREA (gimp_preview->area),
draw_x - gimp_preview->xoff - gimp_preview->xmin,
draw_y - gimp_preview->yoff - gimp_preview->ymin,
draw_width,
draw_height,
type,
src, draw_width * d_bpp,
(buf +
(draw_x - x) * d_bpp +
(draw_y - y) * d_w * d_bpp),
rowstride,
sel, s_w);
g_free (sel);
g_free (src);
}
}
}
static void
gimp_drawable_preview_draw_buffer (GimpPreview *preview,
const guchar *buffer,
gint rowstride)
{
gimp_drawable_preview_draw_area (GIMP_DRAWABLE_PREVIEW (preview),
preview->xmin + preview->xoff,
preview->ymin + preview->yoff,
preview->width,
preview->height,
buffer, rowstride);
}
static void
gimp_drawable_preview_set_drawable (GimpDrawablePreview *drawable_preview,
GimpDrawable *drawable)
{
GimpPreview *preview = GIMP_PREVIEW (drawable_preview);
GimpDrawablePreviewPrivate *priv = GIMP_DRAWABLE_PREVIEW_GET_PRIVATE (preview);
g_return_if_fail (drawable_preview->drawable == NULL);
g_return_if_fail (priv->drawable_ID < 1);
drawable_preview->drawable = drawable;
gimp_drawable_preview_set_drawable_id (drawable_preview,
drawable->drawable_id);
}
static void
gimp_drawable_preview_set_drawable_id (GimpDrawablePreview *drawable_preview,
gint32 drawable_ID)
{
GimpPreview *preview = GIMP_PREVIEW (drawable_preview);
GimpDrawablePreviewPrivate *priv = GIMP_DRAWABLE_PREVIEW_GET_PRIVATE (preview);
gint x1, y1, x2, y2;
g_return_if_fail (priv->drawable_ID < 1);
priv->drawable_ID = drawable_ID;
_gimp_drawable_preview_get_bounds (drawable_ID, &x1, &y1, &x2, &y2);
gimp_preview_set_bounds (preview, x1, y1, x2, y2);
if (gimp_drawable_is_indexed (drawable_ID))
{
guint32 image_ID = gimp_item_get_image (drawable_ID);
guchar *cmap;
gint num_colors;
cmap = gimp_image_get_colormap (image_ID, &num_colors);
gimp_preview_area_set_colormap (GIMP_PREVIEW_AREA (preview->area),
cmap, num_colors);
g_free (cmap);
}
}
#define MAX3(a, b, c) (MAX (MAX ((a), (b)), (c)))
#define MIN3(a, b, c) (MIN (MIN ((a), (b)), (c)))
gboolean
_gimp_drawable_preview_get_bounds (gint32 drawable_ID,
gint *xmin,
gint *ymin,
gint *xmax,
gint *ymax)
{
gint width;
gint height;
gint offset_x;
gint offset_y;
gint x1, y1;
gint x2, y2;
gboolean retval;
g_return_val_if_fail (gimp_item_is_valid (drawable_ID), FALSE);
g_return_val_if_fail (gimp_item_is_drawable (drawable_ID), FALSE);
width = gimp_drawable_width (drawable_ID);
height = gimp_drawable_height (drawable_ID);
retval = gimp_drawable_mask_bounds (drawable_ID, &x1, &y1, &x2, &y2);
gimp_drawable_offsets (drawable_ID, &offset_x, &offset_y);
*xmin = MAX3 (x1 - SELECTION_BORDER, 0, - offset_x);
*ymin = MAX3 (y1 - SELECTION_BORDER, 0, - offset_y);
*xmax = MIN3 (x2 + SELECTION_BORDER, width, width + offset_x);
*ymax = MIN3 (y2 + SELECTION_BORDER, height, height + offset_y);
return retval;
}
/**
* gimp_drawable_preview_new_from_drawable_id:
* @drawable_ID: a drawable ID
*
* Creates a new #GimpDrawablePreview widget for @drawable_ID.
*
* Returns: A pointer to the new #GimpDrawablePreview widget.
*
* Since: 2.10
**/
GtkWidget *
gimp_drawable_preview_new_from_drawable_id (gint32 drawable_ID)
{
g_return_val_if_fail (gimp_item_is_valid (drawable_ID), NULL);
g_return_val_if_fail (gimp_item_is_drawable (drawable_ID), NULL);
return g_object_new (GIMP_TYPE_DRAWABLE_PREVIEW,
"drawable-id", drawable_ID,
NULL);
}
/**
* gimp_drawable_preview_get_drawable_id:
* @preview: a #GimpDrawablePreview widget
*
* Return value: the drawable_ID that has been passed to
* gimp_drawable_preview_new_from_drawable_id().
*
* Since: 2.10
**/
gint32
gimp_drawable_preview_get_drawable_id (GimpDrawablePreview *preview)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE_PREVIEW (preview), -1);
return GIMP_DRAWABLE_PREVIEW_GET_PRIVATE (preview)->drawable_ID;
}
/**
* gimp_drawable_preview_new:
* @drawable: a #GimpDrawable
* @toggle: unused
*
* Creates a new #GimpDrawablePreview widget for @drawable.
*
* In GIMP 2.2 the @toggle parameter was provided to conviently access
* the state of the "Preview" check-button. This is not any longer
* necessary as the preview itself now stores this state, as well as
* the scroll offset.
*
* Returns: A pointer to the new #GimpDrawablePreview widget.
*
* Deprecated: Use gimp_drawable_preview_new_from_drawable_id() instead.
*
* Since: 2.2
**/
GtkWidget *
gimp_drawable_preview_new (GimpDrawable *drawable,
gboolean *toggle)
{
g_return_val_if_fail (drawable != NULL, NULL);
return g_object_new (GIMP_TYPE_DRAWABLE_PREVIEW,
"drawable", drawable,
NULL);
}
/**
* gimp_drawable_preview_get_drawable:
* @preview: a #GimpDrawablePreview widget
*
* Return value: the #GimpDrawable that has been passed to
* gimp_drawable_preview_new().
*
* Deprecated: use gimp_drawable_preview_get_drawable_id() instead.
*
* Since: 2.2
**/
GimpDrawable *
gimp_drawable_preview_get_drawable (GimpDrawablePreview *preview)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE_PREVIEW (preview), NULL);
return preview->drawable;
}
/**
* gimp_drawable_preview_draw_region:
* @preview: a #GimpDrawablePreview widget
* @region: a #GimpPixelRgn
*
* Since: 2.2
**/
void
gimp_drawable_preview_draw_region (GimpDrawablePreview *preview,
const GimpPixelRgn *region)
{
GimpDrawablePreviewPrivate *priv;
g_return_if_fail (GIMP_IS_DRAWABLE_PREVIEW (preview));
g_return_if_fail (region != NULL);
priv = GIMP_DRAWABLE_PREVIEW_GET_PRIVATE (preview);
g_return_if_fail (priv->drawable_ID > 0);
/* If the data field is initialized, this region is currently being
* processed and we can access it directly.
*/
if (region->data)
{
gimp_drawable_preview_draw_area (preview,
region->x,
region->y,
region->w,
region->h,
region->data,
region->rowstride);
}
else
{
GimpPixelRgn src = *region;
gpointer iter;
src.dirty = FALSE; /* we don't dirty the tiles, just read them */
for (iter = gimp_pixel_rgns_register (1, &src);
iter != NULL;
iter = gimp_pixel_rgns_process (iter))
{
gimp_drawable_preview_draw_area (preview,
src.x,
src.y,
src.w,
src.h,
src.data,
src.rowstride);
}
}
}
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