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/*
Copyright (C) 2000 Eazel, Inc.
Copyright (C) 2002 Dom Lachowicz <cinamod@hotmail.com>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library 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: Raph Levien <raph@artofcode.com>
*/
#include "config.h"
#include "rsvg-size-callback.h"
#include <math.h>
void
_rsvg_size_callback (int *width, int *height, gpointer data)
{
struct RsvgSizeCallbackData *real_data = (struct RsvgSizeCallbackData *) data;
double zoomx, zoomy, zoom;
int in_width, in_height;
in_width = *width;
in_height = *height;
switch (real_data->type) {
case RSVG_SIZE_ZOOM:
if (*width < 0 || *height < 0)
return;
*width = floor (real_data->x_zoom * *width + 0.5);
*height = floor (real_data->y_zoom * *height + 0.5);
break;
case RSVG_SIZE_ZOOM_MAX:
if (*width < 0 || *height < 0)
return;
*width = floor (real_data->x_zoom * *width + 0.5);
*height = floor (real_data->y_zoom * *height + 0.5);
if (*width > real_data->width || *height > real_data->height) {
zoomx = (double) real_data->width / *width;
zoomy = (double) real_data->height / *height;
zoom = MIN (zoomx, zoomy);
*width = floor (zoom * *width + 0.5);
*height = floor (zoom * *height + 0.5);
}
break;
case RSVG_SIZE_WH_MAX:
if (*width < 0 || *height < 0)
return;
zoomx = (double) real_data->width / *width;
zoomy = (double) real_data->height / *height;
if (zoomx < 0)
zoom = zoomy;
else if (zoomy < 0)
zoom = zoomx;
else
zoom = MIN (zoomx, zoomy);
*width = floor (zoom * *width + 0.5);
*height = floor (zoom * *height + 0.5);
break;
case RSVG_SIZE_WH:
if (real_data->width != -1)
*width = real_data->width;
if (real_data->height != -1)
*height = real_data->height;
break;
default:
g_assert_not_reached ();
}
if (real_data->keep_aspect_ratio) {
int out_min = MIN (*width, *height);
if (out_min == *width) {
*height = in_height * ((double) *width / (double) in_width);
} else {
*width = in_width * ((double) *height / (double) in_height);
}
}
}
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