path: root/engines/sci/include/engine.h

/***************************************************************************
 engine.h Copyright (C) 1999,2000,01 Christoph Reichenbach

 This program may be modified and copied freely according to the terms of
 the GNU general public license (GPL), as long as the above copyright
 notice and the licensing information contained herein are preserved.

 Please refer to www.gnu.org for licensing details.

 This work is provided AS IS, without warranty of any kind, expressed or
 implied, including but not limited to the warranties of merchantibility,
 noninfringement, and fitness for a specific purpose. The author will not
 be held liable for any damage caused by this work or derivatives of it.

 By using this source code, you agree to the licensing terms as stated
 above.


 Please contact the maintainer for bug reports or inquiries.

 Current Maintainer:

    Christoph Reichenbach (CJR) [creichen@rbg.informatik.tu-darmstadt.de]

***************************************************************************/
#ifndef _SCI_ENGINE_H
#define _SCI_ENGINE_H

#include "common/scummsys.h"

// FIXME. Remove after transiton to File class
#include <sys/stat.h>

#include "sci/include/resource.h"
#include "sci/include/sciresource.h"
#include "sci/include/script.h"
#include "sci/include/vocabulary.h"
#include "sci/include/console.h"
#include "sci/include/vm.h"
#include "sci/include/menubar.h"
#include <time.h>
#include "sci/include/versions.h"
#include "sci/include/kernel.h"
#include "sci/include/gfx_state_internal.h"
#include "sci/include/sfx_engine.h"

#define FREESCI_CURRENT_SAVEGAME_VERSION 7
#define FREESCI_MINIMUM_SAVEGAME_VERSION 7

#ifdef WIN32
#  define FREESCI_GAMEDIR "FreeSCI"
#  define STRLEN_FREESCI_GAMEDIR 7
#else
#  define FREESCI_GAMEDIR ".freesci"
#  define STRLEN_FREESCI_GAMEDIR 8
#endif

#define FREESCI_CONFFILE "config"
#define FREESCI_SAVEDIR_PREFIX "save_"
#define FREESCI_CONFFILE_DOS "freesci.cfg"
#define FREESCI_GAMES_DIR "games"

#define FREESCI_FILE_STATE "state"
#define FREESCI_ID_SUFFIX ".id"
/* Used for <gamename>.id files ("real" save games) */

#define MAX_GAMEDIR_SIZE 32 /* Used for subdirectory inside of "~/.freesci/" */
#define MAX_SAVEGAME_NR 20 /* Maximum number of savegames */

#define MAX_SAVE_DIR_SIZE MAX_HOMEDIR_SIZE + STRLEN_FREESCI_GAMEDIR + MAX_GAMEDIR_SIZE + 4
/* +4 for the three slashes and trailing \0 */

/* values for state_t.restarting_flag */
#define SCI_GAME_IS_NOT_RESTARTING 0
#define SCI_GAME_WAS_RESTARTED 1
#define SCI_GAME_IS_RESTARTING_NOW 2
#define SCI_GAME_WAS_RESTARTED_AT_LEAST_ONCE 4

typedef struct {
	int nr;
	int palette;
} drawn_pic_t;

typedef struct _state {
	int savegame_version;

	int widget_serial_counter; /* Used for savegames */

	char *resource_dir; /* Directory the resource files are kept in */
	char *work_dir; /* Directory the game metadata should be written to */
	resource_mgr_t *resmgr; /* The resource manager */

	char *game_name; /* Designation of the primary object (which inherits from Game) */
	char *game_version;

	/* Non-VM information */

	gfx_state_t *gfx_state; /* Graphics state and driver */
	gfx_pixmap_t *old_screen; /* Old screen content: Stored during kDrawPic() for kAnimate() */

	sfx_state_t sound; /* sound subsystem */
	int sfx_init_flags; /* flags the sfx subsystem was initialised with */
	unsigned int sound_volume; /* 0x0 -> 0xf Current volume of sound system */
	unsigned int sound_mute; /* 0 = not, else == saved value */

	byte restarting_flags; /* Flags used for restarting */
	byte have_mouse_flag;  /* Do we have a hardware pointing device? */

	byte pic_not_valid; /* Is 0 if the background picture is "valid" */
	byte pic_is_new; /* New pic was loaded or port was opened */
	byte onscreen_console;  /* Use the onscreen console for debugging */
	byte *osc_backup; /* Backup of the pre-onscreen console screen data */

	int *pic_priority_table; /* 16 entries with priorities or NULL if not present */

	char *status_bar_text; /* Text on the status bar, or NULL if the title bar is blank */

	int status_bar_foreground, status_bar_background;

	long game_time; /* Counted at 60 ticks per second, reset during start time */

	reg_t save_dir_copy; /* Last copy of the save dir */
	int save_dir_edit_offset; /* For kEdit(): Display offset for editing the savedir */
	char *save_dir_copy_buf; /* Temp savedir buffer for kEdit() */

	int mouse_pointer_view; /* Mouse pointer resource, or -1 if disabled */
	int mouse_pointer_loop; /* Mouse pointer resource, or -1 if disabled */
	int mouse_pointer_cel; /* Mouse pointer resource, or -1 if disabled */
	int save_mouse_pointer_view; /* Temporary storage for mouse pointer resource, when the pointer is hidden */
	int save_mouse_pointer_loop; /* Temporary storage for mouse pointer resource, when the pointer is hidden */
	int save_mouse_pointer_cel; /* Temporary storage for mouse pointer resource, when the pointer is hidden */

	int port_serial; /* Port serial number, for save/restore */
	gfxw_port_t *port; /* The currently active port */

	gfx_color_t ega_colors[16]; /* The 16 EGA colors- for SCI0(1) */

	gfxw_visual_t *visual; /* A visual widget, containing all ports */

	gfxw_port_t *titlebar_port; /* Title bar viewport (0,0,9,319) */
	gfxw_port_t *wm_port; /* window manager viewport and designated &heap[0] view (10,0,199,319) */
	gfxw_port_t *picture_port; /* The background picture viewport (10,0,199,319) */
	gfxw_port_t *iconbar_port; /* Full-screen port used for non-clipped icon bar draw in SCI1 */

	gfx_map_mask_t pic_visible_map; /* The number of the map to display in update commands */
	int pic_animate; /* The animation used by Animate() to display the picture */

	int dyn_views_list_serial; /* Used for save/restore */
	gfxw_list_t *dyn_views; /* Pointers to pic and dynamic view lists */

	int drop_views_list_serial; /* Used for save/restore */
	gfxw_list_t *drop_views; /* A list Animate() can dump dropped dynviews into */

	long animation_delay; /* A delay factor for pic opening animations. Defaults to 500. */
	int animation_granularity; /* Number of animation steps to perform betwen updates for transition animations */

	menubar_t *menubar; /* The menu bar */

	int priority_first; /* The line where priority zone 0 ends */
	int priority_last; /* The line where the highest priority zone starts */

	int pics_drawn_nr;
	int pics_nr;
	drawn_pic_t *pics;

	GTimeVal game_start_time; /* The time at which the interpreter was started */
	GTimeVal last_wait_time; /* The last time the game invoked Wait() */

	byte version_lock_flag; /* Set to 1 to disable any autodetection mechanisms */
	sci_version_t version; /* The approximated patchlevel of the version to emulate */
	sci_version_t max_version, min_version; /* Used for autodetect sanity checks */

	unsigned int kernel_opt_flags; /* Kernel optimization flags- used for performance tweaking */

	/* Kernel File IO stuff */

	int file_handles_nr; /* maximum numer of allowed file handles */
	FILE **file_handles; /* Array of file handles. Dynamically increased if required. */

	reg_t dirseeker_outbuffer;
	sci_dir_t dirseeker;

	/* VM Information */

	exec_stack_t *execution_stack; /* The execution stack */
	int execution_stack_size;      /* Number of stack frames allocated */
	int execution_stack_pos;       /* Position on the execution stack */
	int execution_stack_base;      /* When called from kernel functions, the vm
				       ** is re-started recursively on the same stack.
				       ** This variable contains the stack base for the
				       ** current vm.
				       */
	int execution_stack_pos_changed;   /* Set to 1 if the execution stack position
					   ** should be re-evaluated by the vm
					   */

	reg_t r_acc; /* Accumulator */
	unsigned int r_amp_rest; /* &rest register (only used for save games) */
	reg_t r_prev; /* previous comparison result */

	seg_id_t stack_segment; /* Heap area for the stack to use */
	stack_ptr_t stack_base; /* Pointer to the least stack element */
	stack_ptr_t stack_top; /* First invalid stack element */

	seg_id_t parser_segment;  /* A heap area used by the parser for error reporting */
	reg_t parser_base; /* Base address for the parser error reporting mechanism */
	reg_t parser_event; /* The event passed to Parse() and later used by Said() */
	seg_id_t script_000_segment;
	script_t *script_000;  /* script 000, e.g. for globals */

	int parser_lastmatch_word; /* Position of the input word the parser last matched on, or SAID_NO_MATCH */

	/* Debugger data: */
	breakpoint_t *bp_list;   /* List of breakpoints */
	int have_bp;  /* Bit mask specifying which types of breakpoints are used in bp_list */
	unsigned int debug_mode; /* Contains flags for the various debug modes */

	/* System strings */
	seg_id_t sys_strings_segment;
	sys_strings_t *sys_strings;

	/* Parser data: */
	word_t **parser_words;
	int parser_words_nr;
	suffix_t **parser_suffices;
	int parser_suffices_nr;
	parse_tree_branch_t *parser_branches;
	parse_rule_list_t *parser_rules; /* GNF rules used in the parser algorithm */
	int parser_branches_nr;
	parse_tree_node_t parser_nodes[VOCAB_TREE_NODES]; /* The parse tree */

	int parser_valid; /* If something has been correctly parsed */

	synonym_t *synonyms; /* The list of synonyms */
	int synonyms_nr;

	reg_t game_obj; /* Pointer to the game object */

	int classtable_size; /* Number of classes in the table- for debugging */
	class_t *classtable; /* Table of all classes */

	seg_manager_t seg_manager;
	int gc_countdown; /* Number of kernel calls until next gc */

	int selector_names_nr; /* Number of selector names */
	char **selector_names; /* Zero-terminated selector name list */
	int kernel_names_nr; /* Number of kernel function names */
	char **kernel_names; /* List of kernel names */

	kfunct_sig_pair_t *kfunct_table; /* Table of kernel functions */
	int kfunct_nr; /* Number of mapped kernel functions; may be more than
		       ** kernel_names_nr  */

	opcode *opcodes;

	selector_map_t selector_map; /* Shortcut list for important selectors */

	/* Backwards compatibility crap */
	int port_ID;

	struct _state *successor; /* Successor of this state: Used for restoring */

} state_t;


#define STATE_T_DEFINED

int
gamestate_save(state_t *s, char *dirname);
/* Saves a game state to the hard disk in a portable way
** Parameters: (state_t *) s: The state to save
**             (char *) dirname: The subdirectory to store it in
** Returns   : (int) 0 on success, 1 otherwise
*/

state_t *
gamestate_restore(state_t *s, char *dirname);
/* Restores a game state from a directory
** Parameters: (state_t *) s: An older state from the same game
**             (char *) dirname: The subdirectory to restore from
** Returns   : (state_t *) NULL on failure, a pointer to a valid state_t otherwise
*/

gfx_pixmap_color_t *
get_pic_color(state_t *s, int color);
/* Retrieves the gfx_pixmap_color_t associated with a game color index
** Parameters: (state_t *) s: The game state
**             (int) color: The color to look up
** Returns   : (gfx_pixmap_color_t *) The requested color.
*/

void
other_libs_exit(void);
/* Called directly before FreeSCI ends to allow libraries to clean up
*/

static inline
reg_t not_register(state_t *s, reg_t r) {
	if (s->version >= SCI_VERSION_FTU_INVERSE_CANBEHERE)
		return make_reg(0, !r.offset);
	else
		return r;

}

#endif /* !_SCI_ENGINE_H */