/* Copyright (c) 2001, Stanford University
 * All rights reserved.
 *
 * See the file LICENSE.txt for information on redistributing this software.
 */

#ifndef INCLUDE_CR_SERVER_H
#define INCLUDE_CR_SERVER_H

#include "cr_spu.h"
#include "cr_net.h"
#include "cr_hash.h"
#include "cr_protocol.h"
#include "cr_glstate.h"
#include "spu_dispatch_table.h"

#include "state/cr_currentpointers.h"

#include <iprt/types.h>
#include <iprt/err.h>

#include <VBox/ssm.h>

#ifdef __cplusplus
extern "C" {
#endif

#define CR_MAX_WINDOWS 100
#define CR_MAX_CLIENTS 20

typedef struct {
    CRrecti imagewindow;    /**< coordinates in mural space */
    CRrectf bounds;         /**< normalized coordinates in [-1,-1] x [1,1] */
    CRrecti outputwindow;   /**< coordinates in server's rendering window */
    CRrecti clippedImagewindow;  /**< imagewindow clipped to current viewport */
    CRmatrix baseProjection;  /**< pre-multiplied onto projection matrix */
    CRrecti scissorBox;     /**< passed to back-end OpenGL */
    CRrecti viewport;       /**< passed to back-end OpenGL */
    GLuint serialNo;        /**< an optimization */
} CRExtent;

struct BucketingInfo;

/**
 * Mural info
 */
typedef struct {
    int width, height;
    CRrecti imagespace;                /**< the whole mural rectangle */
    int curExtent;
    int numExtents;                    /**< number of tiles */
    CRExtent extents[CR_MAX_EXTENTS];  /**< per-tile info */
    int maxTileHeight;                 /**< the tallest tile's height */

    /** optimized, hash-based tile bucketing */
    int optimizeBucket;
    struct BucketingInfo *bucketInfo;

    unsigned int underlyingDisplay[4]; /**< needed for laying out the extents */

    GLboolean viewportValidated;

    int spuWindow;                     /**< the SPU's corresponding window ID */
} CRMuralInfo;

/**
 * A client is basically an upstream Cr Node (connected via mothership)
 */
typedef struct _crclient {
    int spu_id;        /**< id of the last SPU in the client's SPU chain */
    CRConnection *conn;       /**< network connection from the client */
    int number;        /**< a unique number for each client */
    GLint currentContextNumber;
    CRContext *currentCtx;
    GLint currentWindow;
    CRMuralInfo *currentMural;
    GLint windowList[CR_MAX_WINDOWS];
    GLint contextList[CR_MAX_CONTEXTS];
} CRClient;


typedef struct CRPoly_t {
    int npoints;
    double *points;
    struct CRPoly_t *next;
} CRPoly;

/**
 * There's one of these run queue entries per client
 * The run queue is a circular, doubly-linked list of these objects.
 */
typedef struct RunQueue_t {
    CRClient *client;
    int blocked;
    struct RunQueue_t *next;
    struct RunQueue_t *prev;
} RunQueue;

typedef struct {
    GLint freeWindowID;
    GLint freeContextID;
    GLint freeClientID;
} CRServerFreeIDsPool_t;

typedef struct {
    unsigned short tcpip_port;

    int numClients;
    CRClient *clients[CR_MAX_CLIENTS];  /**< array [numClients] */
    CRClient *curClient;
    CRCurrentStatePointers current;

    GLboolean firstCallCreateContext;
    GLboolean firstCallMakeCurrent;
    GLboolean bIsInLoadingState; /* Indicates if we're in process of loading VM snapshot */
    GLboolean bIsInSavingState; /* Indicates if we're in process of saving VM snapshot */
    GLint currentWindow;
    GLint currentNativeWindow;

    CRHashTable *muralTable;  /**< hash table where all murals are stored */
    CRHashTable *pWindowCreateInfoTable; /**< hash table with windows creation info */

    int client_spu_id;

    CRServerFreeIDsPool_t idsPool;

    int mtu;
    int buffer_size;
    char protocol[1024];

    SPU *head_spu;
    SPUDispatchTable dispatch;

    CRNetworkPointer return_ptr;
    CRNetworkPointer writeback_ptr;

    CRLimitsState limits; /**< GL limits for any contexts we create */

    int SpuContext; /**< Rendering context for the head SPU */
    int SpuContextVisBits; /**< Context's visual attributes */
    char *SpuContextDpyName; /**< Context's dpyName */

    CRHashTable *contextTable;  /**< hash table for rendering contexts */
    CRHashTable *pContextCreateInfoTable; /**< hash table with contexts creation info */
    CRContext *DummyContext;    /**< used when no other bound context */

    CRHashTable *programTable;  /**< for vertex programs */
    GLuint currentProgram;

    /** configuration options */
    /*@{*/
    int useL2;
    int ignore_papi;
    unsigned int maxBarrierCount;
    unsigned int clearCount;
    int optimizeBucket;
    int only_swap_once;
    int debug_barriers;
    int sharedDisplayLists;
    int sharedTextureObjects;
    int sharedPrograms;
    int sharedWindows;
    int uniqueWindows;
    int localTileSpec;
    int useDMX;
    int overlapBlending;
    int vpProjectionMatrixParameter;
    const char *vpProjectionMatrixVariable;
    int stereoView;
    int vncMode;   /* cmd line option */
    /*@}*/
    /** view_matrix config */
    /*@{*/
    GLboolean viewOverride;
    CRmatrix viewMatrix[2];  /**< left and right eye */
    /*@}*/
    /** projection_matrix config */
    /*@{*/
    GLboolean projectionOverride;
    CRmatrix projectionMatrix[2];  /**< left and right eye */
    int currentEye;
    /*@}*/

    /** for warped tiles */
    /*@{*/
    GLfloat alignment_matrix[16], unnormalized_alignment_matrix[16];
    /*@}*/
    
    /** tile overlap/blending info - this should probably be per-mural */
    /*@{*/
    CRPoly **overlap_geom;
    CRPoly *overlap_knockout;
    float *overlap_intens;
    int num_overlap_intens;
    int num_overlap_levels;
    /*@}*/

    CRHashTable *barriers, *semaphores;

    RunQueue *run_queue;

    GLuint currentSerialNo;
} CRServer;


extern DECLEXPORT(void) crServerInit( int argc, char *argv[] );
extern DECLEXPORT(int)  CRServerMain( int argc, char *argv[] );
extern DECLEXPORT(void) crServerServiceClients(void);
extern DECLEXPORT(void) crServerAddNewClient(void);
extern DECLEXPORT(SPU*) crServerHeadSPU(void);
extern DECLEXPORT(void) crServerSetPort(int port);

extern DECLEXPORT(GLboolean) crVBoxServerInit(void);
extern DECLEXPORT(void) crVBoxServerTearDown(void);
extern DECLEXPORT(void) crVBoxServerAddClient(uint32_t u32ClientID);
extern DECLEXPORT(void) crVBoxServerRemoveClient(uint32_t u32ClientID);
extern DECLEXPORT(void) crVBoxServerClientWrite(uint32_t u32ClientID, uint8_t *pBuffer, uint32_t cbBuffer);
extern DECLEXPORT(int32_t) crVBoxServerClientRead(uint32_t u32ClientID, uint8_t *pBuffer, uint32_t *pcbBuffer);

extern DECLEXPORT(int32_t) crVBoxServerSaveState(PSSMHANDLE pSSM);
extern DECLEXPORT(int32_t) crVBoxServerLoadState(PSSMHANDLE pSSM);
#ifdef __cplusplus
}
#endif

#endif