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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2004 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#ifndef SDL_COMMON_H
#define SDL_COMMON_H
#include "common/stdafx.h"
#include "common/scummsys.h"
#include "common/scaler.h"
#include "common/system.h"
#include "backends/intern.h"
#include <SDL.h>
// Uncomment this to enable the 'on screen display' code.
#define USE_OSD 1
class OSystem_SDL : public OSystem {
public:
OSystem_SDL();
virtual ~OSystem_SDL();
// Set the size of the video bitmap.
// Typically, 320x200
void initSize(uint w, uint h);
// Set colors of the palette
void setPalette(const byte *colors, uint start, uint num);
// Draw a bitmap to screen.
// The screen will not be updated to reflect the new bitmap
void copyRectToScreen(const byte *src, int pitch, int x, int y, int w, int h);
void move_screen(int dx, int dy, int height);
// Update the dirty areas of the screen
void updateScreen();
// Either show or hide the mouse cursor
bool showMouse(bool visible);
// Warp the mouse cursor. Where set_mouse_pos() only informs the
// backend of the mouse cursor's current position, this function
// actually moves the cursor to the specified position.
void warpMouse(int x, int y);
// Set the bitmap that's used when drawing the cursor.
void setMouseCursor(const byte *buf, uint w, uint h, int hotspot_x, int hotspot_y);
// Shaking is used in SCUMM. Set current shake position.
void set_shake_pos(int shake_pos);
// Get the number of milliseconds since the program was started.
uint32 get_msecs();
// Delay for a specified amount of milliseconds
void delay_msecs(uint msecs);
// Get the next event.
// Returns true if an event was retrieved.
bool poll_event(Event *event);
// Set function that generates samples
bool setSoundCallback(SoundProc proc, void *param);
void clearSoundCallback();
// Poll CD status
// Returns true if cd audio is playing
bool poll_cdrom();
// Play CD audio track
void play_cdrom(int track, int num_loops, int start_frame, int duration);
// Stop CD audio track
void stop_cdrom();
// Update CD audio status
void update_cdrom();
// Quit
void quit();
// Add a callback timer
void setTimerCallback(TimerProc callback, int timer);
// Mutex handling
MutexRef createMutex();
void lockMutex(MutexRef mutex);
void unlockMutex(MutexRef mutex);
void deleteMutex(MutexRef mutex);
// Overlay
virtual void showOverlay();
virtual void hideOverlay();
virtual void clearOverlay();
virtual void grabOverlay(OverlayColor *buf, int pitch);
virtual void copyRectToOverlay(const OverlayColor *buf, int pitch, int x, int y, int w, int h);
virtual int16 getHeight();
virtual int16 getWidth();
// Methods that convert RGB to/from colors suitable for the overlay.
virtual OverlayColor RGBToColor(uint8 r, uint8 g, uint8 b);
virtual void colorToRGB(OverlayColor color, uint8 &r, uint8 &g, uint8 &b);
virtual const GraphicsMode *getSupportedGraphicsModes() const;
virtual int getDefaultGraphicsMode() const;
virtual bool setGraphicsMode(int mode);
virtual int getGraphicsMode() const;
virtual void setWindowCaption(const char *caption);
virtual bool openCD(int drive);
virtual int getOutputSampleRate() const;
virtual bool hasFeature(Feature f);
virtual void setFeatureState(Feature f, bool enable);
virtual bool getFeatureState(Feature f);
#ifdef USE_OSD
void displayMessageOnOSD(const char *msg);
#endif
protected:
void init_intern();
#ifdef USE_OSD
SDL_Surface *_osdSurface;
Uint8 _osdAlpha; // Transparency level of the OSD
uint32 _osdFadeStartTime; // When to start the fade out
enum {
kOSDFadeOutDelay = 2 * 1000, // Delay before the OSD is faded out (in milliseconds)
kOSDFadeOutDuration = 500, // Duration of the OSD fade out (in milliseconds)
kOSDColorKey = 1,
kOSDInitialAlpha = 80 // Initial alpha level, in percent
};
#endif
// hardware screen
SDL_Surface *_hwscreen;
// unseen game screen
SDL_Surface *_screen;
int _screenWidth, _screenHeight;
// temporary screen (for scalers/overlay)
SDL_Surface *_tmpscreen;
bool _overlayVisible;
// CD Audio
SDL_CD *_cdrom;
int cd_track, cd_num_loops, cd_start_frame, cd_duration;
Uint32 cd_end_time, cd_stop_time;
enum {
DF_WANT_RECT_OPTIM = 1 << 0,
DF_UPDATE_EXPAND_1_PIXEL = 1 << 1
};
bool _forceFull; // Force full redraw on next updateScreen
ScalerProc *_scaler_proc;
int _scaleFactor;
int _mode;
bool _full_screen;
uint32 _mode_flags;
bool _modeChanged;
/** True if aspect ratio correction is enabled. */
bool _adjustAspectRatio;
enum {
NUM_DIRTY_RECT = 100,
MAX_MOUSE_W = 80,
MAX_MOUSE_H = 80,
MAX_SCALING = 3
};
// Dirty rect managment
SDL_Rect _dirty_rect_list[NUM_DIRTY_RECT];
int _num_dirty_rects;
uint32 *_dirty_checksums;
bool cksum_valid;
int CKSUM_NUM;
// Keyboard mouse emulation
struct KbdMouse {
int16 x, y, x_vel, y_vel, x_max, y_max, x_down_count, y_down_count;
uint32 last_time, delay_time, x_down_time, y_down_time;
} km;
struct MousePos {
int16 x, y, w, h;
MousePos() : x(0), y(0), w(0), h(0) {}
};
// mouse
bool _mouseVisible;
bool _mouseDrawn;
const byte *_mouseData;
byte *_mouseBackup;
MousePos _mouseCurState;
int16 _mouseHotspotX;
int16 _mouseHotspotY;
// joystick
SDL_Joystick *_joystick;
// Shake mode
int _currentShakePos;
int _newShakePos;
// Palette data
SDL_Color *_currentPalette;
uint _paletteDirtyStart, _paletteDirtyEnd;
/**
* Mutex which prevents multiple threads from interfering with each other
* when accessing the screen.
*/
MutexRef _graphicsMutex;
void add_dirty_rgn_auto(const byte *buf);
void mk_checksums(const byte *buf);
void add_dirty_rect(int x, int y, int w, int h);
void draw_mouse();
void undraw_mouse();
/** Set the position of the virtual mouse cursor. */
void set_mouse_pos(int x, int y);
void fillMouseEvent(Event &event, int x, int y);
void toggleMouseGrab();
virtual void internUpdateScreen();
void load_gfx_mode();
void unload_gfx_mode();
void hotswap_gfx_mode();
void setFullscreenMode(bool enable);
bool save_screenshot(const char *filename);
int effectiveScreenHeight() { return (_adjustAspectRatio ? 240 : _screenHeight) * _scaleFactor; }
void setup_icon();
void kbd_mouse();
void init_joystick(int joystick_num) { _joystick = SDL_JoystickOpen(joystick_num); }
};
#endif
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