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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 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
static void gimp_drawable_preview_class_init (GimpDrawablePreviewClass *klass);
static void gimp_drawable_preview_init (GimpDrawablePreview *preview);
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)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GimpPreviewClass *preview_class = GIMP_PREVIEW_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
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_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 gboolean
gimp_rectangle_intersect (gint x1,
gint y1,
gint width1,
gint height1,
gint x2,
gint y2,
gint width2,
gint height2,
gint *dest_x,
gint *dest_y,
gint *dest_width,
gint *dest_height)
{
gint d_x, d_y;
gint d_w, d_h;
d_x = MAX (x1, x2);
d_y = MAX (y1, y2);
d_w = MIN (x1 + width1, x2 + width2) - d_x;
d_h = MIN (y1 + height1, y2 + height2) - d_y;
if (dest_x) *dest_x = d_x;
if (dest_y) *dest_y = d_y;
if (dest_width) *dest_width = d_w;
if (dest_height) *dest_height = d_h;
return (d_w > 0 && d_h > 0);
}
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
{
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 (drawable->drawable_id, &offset_x, &offset_y);
if (gimp_drawable_mask_intersect (drawable->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))
{
GimpDrawable *selection;
GimpPixelRgn drawable_rgn;
GimpPixelRgn selection_rgn;
guchar *src;
guchar *sel;
selection = gimp_drawable_get (gimp_image_get_selection (image_id));
gimp_pixel_rgn_init (&drawable_rgn, drawable,
draw_x, draw_y, draw_width, draw_height,
FALSE, FALSE);
gimp_pixel_rgn_init (&selection_rgn, selection,
draw_x + offset_x, draw_y + offset_y,
draw_width, draw_height,
FALSE, FALSE);
src = g_new (guchar, draw_width * draw_height * drawable->bpp);
sel = g_new (guchar, draw_width * draw_height);
gimp_pixel_rgn_get_rect (&drawable_rgn, src,
draw_x, draw_y,
draw_width, draw_height);
gimp_pixel_rgn_get_rect (&selection_rgn, sel,
draw_x + offset_x, draw_y + offset_y,
draw_width, draw_height);
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,
gimp_drawable_type (drawable->drawable_id),
src, draw_width * drawable->bpp,
buf + (draw_x - x) + (draw_y - y) * rowstride,
rowstride,
sel, draw_width);
g_free (sel);
g_free (src);
gimp_drawable_detach (selection);
}
}
}
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;
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);
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);
}
}
}
|
