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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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.
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#ifndef SCI_INCLUDE_ENGINE_H
#define SCI_INCLUDE_ENGINE_H
#include "common/scummsys.h"
#include "common/array.h"
#include "common/serializer.h"
namespace Common {
class SeekableReadStream;
class WriteStream;
}
#include "sci/sci.h"
#include "sci/vocabulary.h"
#include "sci/resource.h"
#include "sci/engine/kernel.h" // for kfunct_sig_pair_t
#include "sci/engine/message.h" // for MessageState
#include "sci/engine/script.h"
#include "sci/engine/seg_manager.h"
#include "sci/gfx/gfx_system.h"
#include "sci/sfx/core.h"
namespace Sci {
class Menubar;
struct GfxState;
struct GfxPort;
struct GfxVisual;
struct GfxContainer;
struct GfxList;
class DirSeeker {
protected:
EngineState *_vm;
reg_t _outbuffer;
Common::StringList _savefiles;
Common::StringList::const_iterator _iter;
public:
DirSeeker(EngineState *s) : _vm(s) {
_outbuffer = NULL_REG;
_iter = _savefiles.begin();
}
void firstFile(const char *mask, reg_t buffer);
void nextFile();
};
enum {
CURRENT_SAVEGAME_VERSION = 9,
MINIMUM_SAVEGAME_VERSION = 9,
MAX_SAVE_DIR_SIZE = MAXPATHLEN
};
/** values for EngineState.restarting_flag */
enum {
SCI_GAME_IS_NOT_RESTARTING = 0,
SCI_GAME_WAS_RESTARTED = 1,
SCI_GAME_IS_RESTARTING_NOW = 2,
SCI_GAME_WAS_RESTARTED_AT_LEAST_ONCE = 4
};
struct drawn_pic_t {
int nr;
int palette;
};
class FileHandle {
public:
Common::String _name;
Common::SeekableReadStream *_in;
Common::WriteStream *_out;
public:
FileHandle();
~FileHandle();
void close();
bool isOpen() const;
};
struct EngineState : public Common::Serializable {
public:
EngineState();
virtual ~EngineState();
virtual void saveLoadWithSerializer(Common::Serializer &ser);
public:
int widget_serial_counter; /**< Used for savegames */
ResourceManager *resmgr; /**< The resource manager */
Common::String _gameName; /**< Designation of the primary object (which inherits from Game) */
char *game_version;
/* Non-VM information */
GfxState *gfx_state; /**< Graphics state and driver */
gfx_pixmap_t *old_screen; /**< Old screen content: Stored during kDrawPic() for kAnimate() */
SfxState _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 pic_not_valid; /**< Is 0 if the background picture is "valid" */
byte pic_is_new; /**< New pic was loaded or port was opened */
int *pic_priority_table; /**< 16 entries with priorities or NULL if not present */
/** Text on the status bar, or NULL if the title bar is blank */
Common::String _statusBarText;
int status_bar_foreground, status_bar_background;
long game_time; /**< Counted at 60 ticks per second, reset during start time */
GfxPort *port; /**< The currently active port */
gfx_color_t ega_colors[16]; /**< The 16 EGA colors- for SCI0(1) */
GfxVisual *visual; /**< A visual widget, containing all ports */
GfxPort *titlebar_port; /**< Title bar viewport (0,0,9,319) */
GfxPort *wm_port; /**< window manager viewport and designated &heap[0] view (10,0,199,319) */
GfxPort *picture_port; /**< The background picture viewport (10,0,199,319) */
GfxPort *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 */
GfxList *dyn_views; /**< Pointers to pic and dynamic view lists */
GfxList *drop_views; /**< A list Animate() can dump dropped dynviews into */
int animation_granularity; /**< Number of animation steps to perform betwen updates for transition animations */
Menubar *_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 */
Common::Array<drawn_pic_t> _pics;
uint32 game_start_time; /**< The time at which the interpreter was started */
uint32 last_wait_time; /**< The last time the game invoked Wait() */
sci_version_t version; /**< The approximated patchlevel of the version to emulate */
uint32 flags; /**< Specific game flags */
unsigned int kernel_opt_flags; /**< Kernel optimization flags- used for performance tweaking */
/* Kernel File IO stuff */
Common::Array<FileHandle> _fileHandles; /**< Array of file handles. Dynamically increased if required. */
DirSeeker _dirseeker;
/* VM Information */
Common::List<ExecStack> _executionStack; /**< The execution stack */
/**
* 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_base;
bool _executionStackPosChanged; /**< Set to true 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 */
SegmentId stack_segment; /**< Heap area for the stack to use */
StackPtr stack_base; /**< Pointer to the least stack element */
StackPtr stack_top; /**< First invalid stack element */
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() */
Script *script_000; /**< script 000, e.g. for globals */
uint16 currentRoomNumber() const;
/* Debugger data: */
Breakpoint *bp_list; /**< List of breakpoints */
int have_bp; /**< Bit mask specifying which types of breakpoints are used in bp_list */
/* System strings */
SegmentId sys_strings_segment;
SystemStrings *sys_strings;
SegmentId string_frag_segment;
/* Parser data: */
parse_tree_node_t parser_nodes[VOCAB_TREE_NODES]; /**< The parse tree */
int parser_valid; /**< If something has been correctly parsed */
SynonymList _synonyms; /**< The list of synonyms */
reg_t game_obj; /**< Pointer to the game object */
Common::Array<Class> _classtable; /**< Table of all classes */
SegManager *seg_manager;
int gc_countdown; /**< Number of kernel calls until next gc */
MessageState _msgState;
Vocabulary *_vocabulary;
Kernel *_kernel;
EngineState *successor; /**< Successor of this state: Used for restoring */
};
/**
* Retrieves the gfx_pixmap_color_t associated with a game color index.
* @param s game state
* @param color color to look up
* @return the requested color
*/
PaletteEntry get_pic_color(EngineState *s, int color);
// FIXME: Document this strange function.
// It seems to negate the given register but only if the "cantBeHere" exists.
// My guess: Since some SCI versions have cantBeHere and some have canBeHere,
// this function allows unifying the code, making it look identical for both
// kinds of SCI games. That's fine, but the name not_register is rather
// misleading. A different name (and a different place for declaring this)
// would be highly welcome.
static inline reg_t not_register(EngineState *s, reg_t r) {
if (s->_kernel->_selectorMap.cantBeHere != -1)
return make_reg(0, !r.offset);
else
return r;
}
} // End of namespace Sci
#endif // SCI_INCLUDE_ENGINE_H
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