gimp/libgimp/gimpdrawablepreview.c

523 lines
17 KiB
C

/* 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 2 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "gimpuitypes.h"
#include "gimp.h"
#include "gimpdrawablepreview.h"
#define SELECTION_BORDER 2
typedef struct
{
gint x, y;
gboolean update;
} PreviewSettings;
static void gimp_drawable_preview_class_init (GimpDrawablePreviewClass *klass);
static void gimp_drawable_preview_init (GimpDrawablePreview *preview);
static void gimp_drawable_preview_destroy (GtkObject *object);
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 gboolean gimp_drawable_preview_get_bounds (GimpDrawable *drawable,
gint *xmin,
gint *ymin,
gint *xmax,
gint *ymax);
static GimpScrolledPreviewClass *parent_class = NULL;
GType
gimp_drawable_preview_get_type (void)
{
static GType preview_type = 0;
if (!preview_type)
{
static const GTypeInfo drawable_preview_info =
{
sizeof (GimpDrawablePreviewClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_drawable_preview_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpDrawablePreview),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_drawable_preview_init
};
preview_type = g_type_register_static (GIMP_TYPE_SCROLLED_PREVIEW,
"GimpDrawablePreview",
&drawable_preview_info, 0);
}
return preview_type;
}
static void
gimp_drawable_preview_class_init (GimpDrawablePreviewClass *klass)
{
GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GimpPreviewClass *preview_class = GIMP_PREVIEW_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->destroy = gimp_drawable_preview_destroy;
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;
}
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_destroy (GtkObject *object)
{
GimpPreview *preview = GIMP_PREVIEW (object);
PreviewSettings settings;
gchar *data_name;
settings.x = preview->xoff + preview->xmin;
settings.y = preview->yoff + preview->ymin;
data_name = g_strconcat (g_get_prgname (), "-preview", NULL);
gimp_set_data (data_name, &settings, sizeof (PreviewSettings));
g_free (data_name);
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
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)
{
GimpDrawablePreview *drawable_preview = GIMP_DRAWABLE_PREVIEW (preview);
GimpDrawable *drawable = drawable_preview->drawable;
guchar *buffer;
GimpPixelRgn srcPR;
guint rowstride;
if (! drawable)
return;
rowstride = preview->width * drawable->bpp;
buffer = g_new (guchar, rowstride * preview->height);
preview->xoff = CLAMP (preview->xoff,
0, preview->xmax - preview->xmin - preview->width);
preview->yoff = CLAMP (preview->yoff,
0, preview->ymax - preview->ymin - preview->height);
gimp_pixel_rgn_init (&srcPR, drawable,
preview->xoff + preview->xmin,
preview->yoff + preview->ymin,
preview->width, preview->height,
FALSE, FALSE);
gimp_pixel_rgn_get_rect (&srcPR, buffer,
preview->xoff + preview->xmin,
preview->yoff + preview->ymin,
preview->width, preview->height);
gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview->area),
0, 0, preview->width, preview->height,
gimp_drawable_type (drawable->drawable_id),
buffer,
rowstride);
g_free (buffer);
}
static void
gimp_drawable_preview_draw_thumb (GimpPreview *preview,
GimpPreviewArea *area,
gint width,
gint height)
{
GimpDrawablePreview *drawable_preview = GIMP_DRAWABLE_PREVIEW (preview);
GimpDrawable *drawable = drawable_preview->drawable;
guchar *buffer;
gint x1, y1, x2, y2;
gint bpp;
if (! drawable)
return;
if (gimp_drawable_preview_get_bounds (drawable, &x1, &y1, &x2, &y2))
{
buffer = gimp_drawable_get_sub_thumbnail_data (drawable->drawable_id,
x1, y1, x2 - x1, y2 - y1,
&width, &height, &bpp);
}
else
{
buffer = gimp_drawable_get_thumbnail_data (drawable->drawable_id,
&width, &height, &bpp);
}
if (buffer)
{
GimpImageType type;
gtk_widget_set_size_request (GTK_WIDGET (area), width, 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, width, height,
type, buffer, bpp * 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)
{
GimpPreview *gimp_preview = GIMP_PREVIEW (preview);
GimpDrawable *drawable = preview->drawable;
gint32 image_id;
image_id = gimp_drawable_get_image (drawable->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 (drawable->drawable_id),
buf, rowstride);
}
else
{
GimpPixelRgn drawable_rgn;
GimpPixelRgn selection_rgn;
guchar *src;
guchar *sel;
gint offset_x;
gint offset_y;
gint selection_id;
selection_id = gimp_image_get_selection (image_id);
gimp_drawable_offsets (drawable->drawable_id, &offset_x, &offset_y);
gimp_pixel_rgn_init (&drawable_rgn, drawable,
x, y, width, height,
FALSE, FALSE);
gimp_pixel_rgn_init (&selection_rgn, gimp_drawable_get (selection_id),
x + offset_x, y + offset_y, width, height,
FALSE, FALSE);
src = g_new (guchar, width * height * drawable->bpp);
sel = g_new (guchar, width * height);
gimp_pixel_rgn_get_rect (&drawable_rgn,
src, x, y, width, height);
gimp_pixel_rgn_get_rect (&selection_rgn,
sel, x + offset_x, y + offset_y, width, height);
gimp_preview_area_mask (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 (drawable->drawable_id),
src, width * drawable->bpp,
buf, rowstride,
sel, width);
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);
gint x1, y1, x2, y2;
drawable_preview->drawable = drawable;
gimp_drawable_preview_get_bounds (drawable, &x1, &y1, &x2, &y2);
gimp_preview_set_bounds (preview, x1, y1, x2, y2);
if (gimp_drawable_is_indexed (drawable->drawable_id))
{
guint32 image = gimp_drawable_get_image (drawable->drawable_id);
guchar *cmap;
gint num_colors;
cmap = gimp_image_get_colormap (image, &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)))
static gboolean
gimp_drawable_preview_get_bounds (GimpDrawable *drawable,
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;
width = gimp_drawable_width (drawable->drawable_id);
height = gimp_drawable_height (drawable->drawable_id);
retval = gimp_drawable_mask_bounds (drawable->drawable_id,
&x1, &y1, &x2, &y2);
gimp_drawable_offsets (drawable->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;
}
static void
gimp_drawable_preview_notify_update (GimpPreview *preview,
GParamSpec *pspec,
gboolean *toggle)
{
*toggle = gimp_preview_get_update (preview);
}
/**
* gimp_drawable_preview_new:
* @drawable: a #GimpDrawable
* @toggle: pointer to a #gboolean variable to sync with the "Preview"
* check-button or %NULL
*
* Creates a new #GimpDrawablePreview widget for @drawable. If
* updating the preview takes considerable time, you will want to
* store the state of the "Preview" check-button in the plug-in
* data. For convenience you can pass a pointer to the #gboolean as
* @toggle.
*
* Returns: A pointer to the new #GimpDrawablePreview widget.
*
* Since: GIMP 2.2
**/
GtkWidget *
gimp_drawable_preview_new (GimpDrawable *drawable,
gboolean *toggle)
{
GimpDrawablePreview *preview;
gchar *data_name;
PreviewSettings settings;
g_return_val_if_fail (drawable != NULL, NULL);
preview = g_object_new (GIMP_TYPE_DRAWABLE_PREVIEW, NULL);
if (toggle)
{
gimp_preview_set_update (GIMP_PREVIEW (preview), *toggle);
g_signal_connect (preview, "notify::update",
G_CALLBACK (gimp_drawable_preview_notify_update),
toggle);
}
gimp_drawable_preview_set_drawable (preview, drawable);
data_name = g_strconcat (g_get_prgname (), "-preview", NULL);
if (gimp_get_data (data_name, &settings))
{
gimp_scrolled_preview_set_position (GIMP_SCROLLED_PREVIEW (preview),
settings.x, settings.y);
}
g_free (data_name);
return GTK_WIDGET (preview);
}
/**
* gimp_drawable_preview_get_drawable:
* @preview: a #GimpDrawablePreview widget
*
* Return value: the #GimpDrawable that has been passed to
* gimp_drawable_preview_new().
*
* Since: GIMP 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: GIMP 2.2
**/
void
gimp_drawable_preview_draw_region (GimpDrawablePreview *preview,
const GimpPixelRgn *region)
{
g_return_if_fail (GIMP_IS_DRAWABLE_PREVIEW (preview));
g_return_if_fail (preview->drawable != NULL);
g_return_if_fail (region != NULL);
/* 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);
}
}
}