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/*
* Copyright (C) 2000-2002 the xine project
*
* This file is part of xine, a free video player.
*
* xine is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* xine 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
*
* $Id: vo_scale.h,v 1.1 2002/08/15 03:12:27 miguelfreitas Exp $
*
* vo_scale.h
*
* keeps video scaling information
*/
#ifndef HAVE_VO_SCALE_H
#define HAVE_VO_SCALE_H
#ifdef __cplusplus
extern "C" {
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
typedef struct {
int x, y;
int w, h;
} vo_scale_rect_t;
struct vo_scale_s {
/* display anatomy */
double display_ratio; /* given by visual parameter
from init function */
/* true if driver supports frame zooming */
int support_zoom;
/* forces direct mapping between frame pixels and screen pixels */
int scaling_disabled;
/* size / aspect ratio calculations */
/*
* "delivered" size:
* frame dimension / aspect as delivered by the decoder
* used (among other things) to detect frame size changes
* units: frame pixels
*/
int delivered_width;
int delivered_height;
int delivered_ratio_code;
/*
* displayed part of delivered images,
* taking zoom into account
* units: frame pixels
*/
int displayed_xoffset;
int displayed_yoffset;
int displayed_width;
int displayed_height;
double zoom_factor_x, zoom_factor_y;
/*
* "ideal" size :
* delivered width/height corrected by aspect ratio and display_ratio
* units: screen pixels
*/
int ideal_width, ideal_height;
int user_ratio;
/*
* "gui" size / offset:
* what gui told us about where to display the video
* units: screen pixels
*/
int gui_x, gui_y;
int gui_width, gui_height;
int gui_win_x, gui_win_y;
/*
* "output" size:
*
* this is finally the ideal size "fitted" into the
* gui size while maintaining the aspect ratio
* units: screen pixels
*/
int output_width;
int output_height;
int output_xoffset;
int output_yoffset;
/* */
int force_redraw;
/* gui callbacks */
void *user_data;
void (*frame_output_cb) (void *user_data,
int video_width, int video_height,
int *dest_x, int *dest_y,
int *dest_height, int *dest_width,
int *win_x, int *win_y);
void (*dest_size_cb) (void *user_data,
int video_width, int video_height,
int *dest_width, int *dest_height);
/* borders */
vo_scale_rect_t border[4];
};
typedef struct vo_scale_s vo_scale_t;
/*
* convert delivered height/width to ideal width/height
* taking into account aspect ratio and zoom factor
*/
void vo_scale_compute_ideal_size (vo_scale_t *this);
/*
* make ideal width/height "fit" into the gui
*/
void vo_scale_compute_output_size (vo_scale_t *this);
/*
* return true if a redraw is needed due resizing, zooming,
* aspect ratio changing, etc.
*/
int vo_scale_redraw_needed (vo_scale_t *this);
/*
*
*/
void vo_scale_translate_gui2video(vo_scale_t *this,
int x, int y,
int *vid_x, int *vid_y);
/*
* Returns description of a given ratio code
*/
char *vo_scale_aspect_ratio_name(int a);
/*
* initialize rescaling struct
*/
void vo_scale_init(vo_scale_t *this, double display_ratio,
int support_zoom, int scaling_disabled );
#ifdef __cplusplus
}
#endif
#endif
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