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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.
*
*/
#ifndef __OSYS_N64_H__
#define __OSYS_N64_H__
#include "common/rect.h"
#include "common/config-manager.h"
#include "backends/base-backend.h"
#include "base/main.h"
#include "graphics/surface.h"
#include "graphics/colormasks.h"
#include "graphics/palette.h"
#include "graphics/pixelformat.h"
#include "audio/mixer_intern.h"
#include <libn64.h>
#include <n64utils.h>
#define DEFAULT_SOUND_SAMPLE_RATE 8000 // 8 kHz
//#define DEFAULT_SOUND_SAMPLE_RATE 11025 // 11 kHz
#define N64_PAL_FPS 25
#define N64_NTSC_FPS 30
typedef int (*TimerProc)(int interval);
// Interrupt callback functions
void vblCallback(void);
void sndCallback(void);
void refillAudioBuffers(void);
// External utility functions
void enableAudioPlayback(void);
void disableAudioPlayback(void);
void checkTimers(void);
int timer_handler(int t);
static volatile bool _audioEnabled = false; // Used by interrupt callbacks
/* Graphic mode identifiers */
enum GraphicModeID {
OVERS_NTSC_340X240,
NORM_NTSC_320X240,
NORM_PAL_320X240,
OVERS_PAL_340X240,
NORM_MPAL_320X240,
OVERS_MPAL_340X240
};
class OSystem_N64 : public BaseBackend, public PaletteManager {
protected:
Audio::MixerImpl *_mixer;
FilesystemFactory *_fsFactory;
struct display_context * _dc; // Display context for N64 on screen buffer switching
Graphics::Surface _framebuffer;
uint16 *_offscreen_hic; // Offscreen converted to 16bit surface
uint8 *_offscreen_pal; // Offscreen with palette indexes
OverlayColor *_overlayBuffer; // Offscreen for the overlay (16 bit)
uint16 *_screenPalette; // Array for palette entries (256 colors max)
#ifndef N64_EXTREME_MEMORY_SAVING
uint8 *_screenExactPalette; // Array for palette entries, as received by setPalette(), no precision loss
#endif
uint16 _cursorPalette[256]; // Palette entries for the cursor
int _graphicMode; // Graphic mode
uint16 _screenWidth, _screenHeight;
uint16 _gameWidth, _gameHeight;
uint16 _frameBufferWidth; // Width of framebuffer in N64 memory
uint8 _offscrPixels; // Pixels to skip on each line before start drawing, used to center image
uint8 _maxFps; // Max frames-per-second which can be shown on screen
int _shakeOffset;
uint8 *_cursor_pal; // Cursor buffer, palettized
uint16 *_cursor_hic; // Cursor buffer, 16bit
bool _cursorPaletteDisabled;
bool _dirtyPalette;
// FIXME: This must be left as "int" for now, to fix the sign-comparison problem
// there is a little more work involved than an int->uint change
int _cursorWidth, _cursorHeight;
int _cursorKeycolor;
uint16 _overlayHeight, _overlayWidth;
bool _overlayVisible;
bool _disableFpsLimit; // When this is enabled, the system doesn't limit screen updates
bool _mouseVisible;
volatile int _mouseX, _mouseY;
volatile float _tempMouseX, _tempMouseY;
volatile int _mouseMaxX, _mouseMaxY;
int _mouseHotspotX, _mouseHotspotY;
int8 _controllerPort;
int8 _mousePort;
bool _controllerHasRumble; // Gets enabled if rumble-pak is detected
bool _dirtyOffscreen;
public:
/* These have to be accessed by interrupt callbacks */
uint16 _audioBufferSize;
uint32 _viClockRate; // Clock rate of video system, depending on VI mode
uint32 _timerCallbackNext;
uint32 _timerCallbackTimer;
TimerProc _timerCallback;
/* *** */
OSystem_N64();
virtual ~OSystem_N64();
virtual void initBackend();
virtual bool hasFeature(Feature f);
virtual void setFeatureState(Feature f, bool enable);
virtual bool getFeatureState(Feature f);
virtual const GraphicsMode *getSupportedGraphicsModes() const;
virtual int getDefaultGraphicsMode() const;
bool setGraphicsMode(const char *name);
virtual bool setGraphicsMode(int mode);
virtual int getGraphicsMode() const;
virtual void initSize(uint width, uint height, const Graphics::PixelFormat *format);
virtual int16 getHeight();
virtual int16 getWidth();
virtual PaletteManager *getPaletteManager() { return this; }
protected:
// PaletteManager API
virtual void setPalette(const byte *colors, uint start, uint num);
virtual void grabPalette(byte *colors, uint start, uint num);
public:
virtual void copyRectToScreen(const byte *buf, int pitch, int x, int y, int w, int h);
virtual void updateScreen();
virtual Graphics::Surface *lockScreen();
virtual void unlockScreen();
virtual void setShakePos(int shakeOffset);
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 getOverlayHeight();
virtual int16 getOverlayWidth();
virtual Graphics::PixelFormat getOverlayFormat() const {
return Graphics::createPixelFormat<555>();
}
virtual bool showMouse(bool visible);
virtual void warpMouse(int x, int y);
virtual void setMouseCursor(const byte *buf, uint w, uint h, int hotspotX, int hotspotY, uint32 keycolor, int cursorTargetScale, const Graphics::PixelFormat *format);
virtual void setCursorPalette(const byte *colors, uint start, uint num);
virtual bool pollEvent(Common::Event &event);
virtual uint32 getMillis();
virtual void delayMillis(uint msecs);
virtual MutexRef createMutex(void);
virtual void lockMutex(MutexRef mutex);
virtual void unlockMutex(MutexRef mutex);
virtual void deleteMutex(MutexRef mutex);
virtual void quit();
virtual Audio::Mixer *getMixer();
virtual void getTimeAndDate(TimeDate &t) const;
virtual void setTimerCallback(TimerProc callback, int interval);
FilesystemFactory *getFilesystemFactory();
void rebuildOffscreenGameBuffer(void);
void rebuildOffscreenMouseBuffer(void);
void switchGraphicModeId(int mode);
void setupMixer(void);
void detectControllers(void);
void readControllerAnalogInput(void); // read controller analog nub position
};
#endif /* __OSYS_N64_H__ */
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