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Diffstat (limited to 'src/xine-engine/vo_scale.h')
| -rw-r--r-- | src/xine-engine/vo_scale.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/src/xine-engine/vo_scale.h b/src/xine-engine/vo_scale.h new file mode 100644 index 000000000..934da69e5 --- /dev/null +++ b/src/xine-engine/vo_scale.h @@ -0,0 +1,178 @@ +/* + * 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 + |