source: trunk/third/evolution/shell/e-shell-corba-icon-utils.c @ 18142

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-shell-corba-icon-utils.c
 *
 * Copyright (C) 2002  Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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.
 *
 * Author: Ettore Perazzoli
 */

#include "e-shell-corba-icon-utils.h"



/**
 * e_store_corba_icon_from_pixbuf:
 * @pixbuf: 
 * @icon_return: 
 * 
 * Store a CORBA Evolution::Icon in *@icon_return.  @icon_return is not
 * supposed to point to allocated memory, so all of its pointers are just
 * overwritten.
 **/
void
e_store_corba_icon_from_pixbuf (GdkPixbuf *pixbuf,
                                GNOME_Evolution_Icon *icon_return)
{
        const char *sp;
        CORBA_octet *dp;
        int width, height, total_width, rowstride;
        int i, j;
        gboolean has_alpha;

        if (pixbuf == NULL) {
                icon_return->width = 0;
                icon_return->height = 0;
                icon_return->hasAlpha = FALSE;
                icon_return->rgbaData._length = 0;
                icon_return->rgbaData._maximum = 0;
                icon_return->rgbaData._buffer = NULL;
                return;
        }

        width     = gdk_pixbuf_get_width (pixbuf);
        height    = gdk_pixbuf_get_height (pixbuf);
        rowstride = gdk_pixbuf_get_rowstride (pixbuf);
        has_alpha = gdk_pixbuf_get_has_alpha (pixbuf);

        if (has_alpha)
                total_width = 4 * width;
        else
                total_width = 3 * width;

        icon_return->width = width;
        icon_return->height = height;
        icon_return->hasAlpha = has_alpha;

        icon_return->rgbaData._length = icon_return->height * total_width;
        icon_return->rgbaData._maximum = icon_return->rgbaData._length;
        icon_return->rgbaData._buffer = CORBA_sequence_CORBA_octet_allocbuf (icon_return->rgbaData._maximum);

        sp = gdk_pixbuf_get_pixels (pixbuf);
        dp = icon_return->rgbaData._buffer;
        for (i = 0; i < height; i ++) {
                for (j = 0; j < total_width; j++)
                        *(dp ++) = sp[j];
                sp += rowstride;
        }

        CORBA_sequence_set_release (& icon_return->rgbaData, TRUE);
}

/**
 * e_new_corba_icon_from_pixbuf:
 * @pixbuf: 
 * 
 * Create a CORBA Evolution::Icon from the specified @pixbuf.
 * 
 * Return value: The new Evolution::Icon.
 **/
GNOME_Evolution_Icon *
e_new_corba_icon_from_pixbuf (GdkPixbuf *pixbuf)
{
        GNOME_Evolution_Icon *icon;

        icon = GNOME_Evolution_Icon__alloc ();
        e_store_corba_icon_from_pixbuf (pixbuf, icon);

        return icon;
}

/**
 * e_new_corba_animated_icon_from_pixbuf_array:
 * @pixbuf_array: 
 * 
 * Generate a CORBA Evolution::AnimatedIcon from a NULL-terminated
 * @pixbuf_array.
 * 
 * Return value: The new Evolution::AnimatedIcon.
 **/
GNOME_Evolution_AnimatedIcon *
e_new_corba_animated_icon_from_pixbuf_array (GdkPixbuf **pixbuf_array)
{
        GNOME_Evolution_AnimatedIcon *animated_icon;
        GdkPixbuf **p;
        int num_frames;
        int i;

        g_return_val_if_fail (pixbuf_array != NULL, NULL);

        num_frames = 0;
        for (p = pixbuf_array; *p != NULL; p++)
                num_frames++; 

        if (num_frames == 0)
                return NULL;

        animated_icon = GNOME_Evolution_AnimatedIcon__alloc ();

        animated_icon->_length = num_frames;
        animated_icon->_maximum = num_frames;
        animated_icon->_buffer = CORBA_sequence_GNOME_Evolution_Icon_allocbuf (animated_icon->_maximum);

        for (i = 0; i < num_frames; i++)
                e_store_corba_icon_from_pixbuf (pixbuf_array[i], & animated_icon->_buffer[i]);

        CORBA_sequence_set_release (animated_icon, TRUE);

        return animated_icon;
}


/**
 * e_new_gdk_pixbuf_from_corba_icon:
 * @icon: A CORBA Evolution::Icon.
 * @scaled_width: Width of the GdkPixbuf to obtain.
 * @scaled_height: Width of the GdkPixbuf to obtain.
 *
 * If @scaled_width or @scaled_height is -1, do not scale.
 * 
 * Create a GdkPixbuf for the specified CORBA @icon.
 * 
 * Return value: The newly created GdkPixbuf.
 **/
GdkPixbuf *
e_new_gdk_pixbuf_from_corba_icon  (const GNOME_Evolution_Icon *icon,
                                   int scaled_width,
                                   int scaled_height)
{
        GdkPixbuf *pixbuf;
        GdkPixbuf *scaled_pixbuf;
        unsigned char *p;
        int src_offset;
        int i, j;
        int rowstride;
        int total_width;

        g_return_val_if_fail (icon != NULL, NULL);

        if (scaled_width == -1)
                scaled_width = icon->width;

        if (scaled_height == -1)
                scaled_height = icon->height;

        pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, icon->hasAlpha, 8, icon->width, icon->height);

        if (icon->hasAlpha)
                total_width = 4 * icon->width;
        else
                total_width = 3 * icon->width;

        rowstride = gdk_pixbuf_get_rowstride (pixbuf);
        src_offset = 0;
        p = gdk_pixbuf_get_pixels (pixbuf);

        for (i = 0; i < icon->height; i++) {
                for (j = 0; j < total_width; j++)
                        p[j] = icon->rgbaData._buffer[src_offset ++];
                p += rowstride;
        }

        if (icon->width == scaled_width && icon->height == scaled_height)
                return pixbuf;
                
        scaled_pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, icon->hasAlpha, 8, scaled_width, scaled_height);
        gdk_pixbuf_scale (pixbuf, scaled_pixbuf,
                          0, 0, scaled_width, scaled_height,
                          0, 0, (double) scaled_width / icon->width, (double) scaled_height / icon->height,
                          GDK_INTERP_HYPER);

        gdk_pixbuf_unref (pixbuf);

        return scaled_pixbuf;
}