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backends/platform/n64/osys_n64.h
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209
backends/platform/n64/osys_n64.h
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/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef __OSYS_N64_H__
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#define __OSYS_N64_H__
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#include "common/rect.h"
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#include "common/config-manager.h"
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#include "backends/base-backend.h"
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#include "base/main.h"
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#include "graphics/surface.h"
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#include "graphics/paletteman.h"
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#include "graphics/pixelformat.h"
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#include "audio/mixer_intern.h"
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#include <libn64.h>
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#include <n64utils.h>
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#define DEFAULT_SOUND_SAMPLE_RATE 8000 // 8 kHz
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//#define DEFAULT_SOUND_SAMPLE_RATE 11025 // 11 kHz
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#define N64_PAL_FPS 25
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#define N64_NTSC_FPS 30
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typedef int (*TimerProc)(int interval);
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// Interrupt callback functions
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void vblCallback(void);
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void sndCallback(void);
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void refillAudioBuffers(void);
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// External utility functions
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void enableAudioPlayback(void);
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void disableAudioPlayback(void);
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void checkTimers(void);
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int timer_handler(int t);
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static volatile bool _audioEnabled = false; // Used by interrupt callbacks
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/* Graphic mode identifiers */
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enum GraphicModeID {
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OVERS_NTSC_340X240,
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NORM_NTSC_320X240,
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NORM_PAL_320X240,
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OVERS_PAL_340X240,
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NORM_MPAL_320X240,
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OVERS_MPAL_340X240
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};
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class OSystem_N64 : public EventsBaseBackend, public PaletteManager {
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protected:
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Audio::MixerImpl *_mixer;
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struct display_context * _dc; // Display context for N64 on screen buffer switching
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Graphics::Surface _framebuffer;
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uint16 *_offscreen_hic; // Offscreen converted to 16bit surface
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uint8 *_offscreen_pal; // Offscreen with palette indexes
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uint16 *_overlayBuffer; // Offscreen for the overlay (16 bit)
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uint16 *_screenPalette; // Array for palette entries (256 colors max)
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#ifndef N64_EXTREME_MEMORY_SAVING
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uint8 *_screenExactPalette; // Array for palette entries, as received by setPalette(), no precision loss
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#endif
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uint16 _cursorPalette[256]; // Palette entries for the cursor
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int _graphicMode; // Graphic mode
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uint16 _screenWidth, _screenHeight;
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uint16 _gameWidth, _gameHeight;
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uint16 _frameBufferWidth; // Width of framebuffer in N64 memory
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uint8 _offscrPixels; // Pixels to skip on each line before start drawing, used to center image
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uint8 _maxFps; // Max frames-per-second which can be shown on screen
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int _shakeXOffset;
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int _shakeYOffset;
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uint8 *_cursor_pal; // Cursor buffer, palettized
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uint16 *_cursor_hic; // Cursor buffer, 16bit
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bool _cursorPaletteDisabled;
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bool _dirtyPalette;
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uint _cursorWidth, _cursorHeight;
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int _cursorKeycolor;
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uint16 _overlayHeight, _overlayWidth;
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bool _overlayVisible;
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bool _overlayInGUI;
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bool _disableFpsLimit; // When this is enabled, the system doesn't limit screen updates
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bool _mouseVisible;
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volatile int _mouseX, _mouseY;
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volatile float _tempMouseX, _tempMouseY;
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volatile int _mouseMaxX, _mouseMaxY;
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int _mouseHotspotX, _mouseHotspotY;
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int8 _controllerPort;
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int8 _mousePort;
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bool _controllerHasRumble; // Gets enabled if rumble-pak is detected
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bool _dirtyOffscreen;
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public:
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/* These have to be accessed by interrupt callbacks */
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uint16 _audioBufferSize;
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uint32 _viClockRate; // Clock rate of video system, depending on VI mode
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uint32 _timerCallbackNext;
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uint32 _timerCallbackTimer;
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TimerProc _timerCallback;
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/* *** */
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OSystem_N64();
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virtual ~OSystem_N64();
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virtual void initBackend();
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virtual bool hasFeature(Feature f);
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virtual void setFeatureState(Feature f, bool enable);
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virtual bool getFeatureState(Feature f);
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virtual const GraphicsMode *getSupportedGraphicsModes() const;
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virtual int getDefaultGraphicsMode() const;
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virtual bool setGraphicsMode(int mode, uint flags = OSystem::kGfxModeNoFlags);
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virtual int getGraphicsMode() const;
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virtual void initSize(uint width, uint height, const Graphics::PixelFormat *format);
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virtual int16 getHeight();
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virtual int16 getWidth();
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virtual PaletteManager *getPaletteManager() { return this; }
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protected:
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// PaletteManager API
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virtual void setPalette(const byte *colors, uint start, uint num);
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virtual void grabPalette(byte *colors, uint start, uint num) const;
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public:
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virtual void copyRectToScreen(const void *buf, int pitch, int x, int y, int w, int h);
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virtual void updateScreen();
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virtual Graphics::Surface *lockScreen();
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virtual void unlockScreen();
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virtual void setShakePos(int shakeXOffset, int shakeYOffset);
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virtual void showOverlay(bool inGUI);
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virtual void hideOverlay();
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virtual bool isOverlayVisible() const { return _overlayVisible; }
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virtual void clearOverlay();
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virtual void grabOverlay(Graphics::Surface &surface);
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virtual void copyRectToOverlay(const void *buf, int pitch, int x, int y, int w, int h);
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virtual int16 getOverlayHeight() const;
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virtual int16 getOverlayWidth() const;
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virtual Graphics::PixelFormat getOverlayFormat() const {
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return Graphics::PixelFormat(2, 5, 5, 5, 0, 11, 6, 1, 0);
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}
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virtual bool showMouse(bool visible);
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virtual void warpMouse(int x, int y);
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virtual void setMouseCursor(const void *buf, uint w, uint h, int hotspotX, int hotspotY, uint32 keycolor, bool dontScale, const Graphics::PixelFormat *format, const byte *mask);
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virtual void setCursorPalette(const byte *colors, uint start, uint num);
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virtual bool pollEvent(Common::Event &event);
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virtual uint32 getMillis(bool skipRecord = false);
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virtual void delayMillis(uint msecs);
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virtual Common::MutexInternal *createMutex(void);
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virtual void quit();
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virtual Audio::Mixer *getMixer();
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virtual void getTimeAndDate(TimeDate &t, bool skipRecord = false) const;
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virtual void setTimerCallback(TimerProc callback, int interval);
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virtual void logMessage(LogMessageType::Type type, const char *message);
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void rebuildOffscreenGameBuffer(void);
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void rebuildOffscreenMouseBuffer(void);
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void switchGraphicModeId(int mode);
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void setupMixer(void);
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void detectControllers(void);
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void readControllerAnalogInput(void); // read controller analog nub position
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};
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#endif /* __OSYS_N64_H__ */
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