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/**************************************************************************/
/* */
/* Copyright (c) 2001, 2010 NoMachine, http://www.nomachine.com/. */
/* */
/* NXCOMP, NX protocol compression and NX extensions to this software */
/* are copyright of NoMachine. Redistribution and use of the present */
/* software is allowed according to terms specified in the file LICENSE */
/* which comes in the source distribution. */
/* */
/* Check http://www.nomachine.com/licensing.html for applicability. */
/* */
/* NX and NoMachine are trademarks of Medialogic S.p.A. */
/* */
/* All rights reserved. */
/* */
/**************************************************************************/
#ifndef RenderExtension_H
#define RenderExtension_H
#include "Message.h"
//
// Set the verbosity level.
//
#define PANIC
#define WARNING
#undef TEST
#undef DEBUG
#undef DUMP
//
// Compression of data part is not enabled as
// most messages of this type are smaller than
// the current data size compression threshold.
//
#define RENDEREXTENSION_ENABLE_CACHE 1
#define RENDEREXTENSION_ENABLE_DATA 0
#define RENDEREXTENSION_ENABLE_SPLIT 0
#define RENDEREXTENSION_ENABLE_COMPRESS 0
#define RENDEREXTENSION_DATA_LIMIT 6144
#define RENDEREXTENSION_DATA_OFFSET 36
#define RENDEREXTENSION_CACHE_THRESHOLD 20
#define RENDEREXTENSION_CACHE_LOWER_THRESHOLD 10
#define RENDEREXTENSION_CACHE_SLOTS_IF_PROTO_STEP_7 8000
//
// Used to build the table of minor opcodes.
//
#define RENDEREXTENSION_MINOR_OPCODE_LIMIT 256
//
// The message class.
//
class RenderMinorExtensionStore;
class RenderExtensionMessage : public Message
{
friend class RenderExtensionStore;
friend class RenderMinorExtensionStore;
friend class RenderGenericRequestStore;
friend class RenderCreatePictureStore;
friend class RenderChangePictureStore;
friend class RenderFreePictureStore;
friend class RenderPictureClipStore;
friend class RenderPictureTransformStore;
friend class RenderPictureFilterStore;
friend class RenderCreateGlyphSetStore;
friend class RenderFreeGlyphSetStore;
friend class RenderAddGlyphsStore;
friend class RenderCompositeStore;
friend class RenderCompositeGlyphsStore;
friend class RenderFillRectanglesStore;
friend class RenderTrapezoidsStore;
friend class RenderTrianglesStore;
friend class RenderCreatePictureCompatStore;
friend class RenderFreePictureCompatStore;
friend class RenderPictureClipCompatStore;
friend class RenderCreateGlyphSetCompatStore;
friend class RenderCompositeCompatStore;
friend class RenderCompositeGlyphsCompatStore;
public:
RenderExtensionMessage()
{
}
~RenderExtensionMessage()
{
}
//
// We consider for this message a data offset of 36,
// that is size of the biggest among all requests of
// this extension. The most common requests have a
// specific differential encoding, others are simply
// encoded through an array of int or char caches.
//
private:
union
{
struct
{
unsigned char type;
unsigned char char_data[32];
unsigned short short_data[16];
unsigned short long_data[8];
}
any;
struct
{
unsigned char type;
unsigned int src_id;
unsigned int dst_id;
unsigned int format;
unsigned int mask;
}
create_picture;
struct
{
unsigned char type;
unsigned int src_id;
}
change_picture;
struct
{
unsigned char type;
unsigned int src_id;
}
free_picture;
struct
{
unsigned char type;
unsigned int src_id;
unsigned short src_x;
unsigned short src_y;
}
picture_clip;
struct
{
unsigned char type;
unsigned int src_id;
}
picture_transform;
struct
{
unsigned char type;
unsigned int src_id;
unsigned int num_elm;
}
picture_filter;
struct
{
unsigned char type;
unsigned int set_id;
unsigned int format;
}
create_set;
struct
{
unsigned char type;
unsigned int set_id;
}
free_set;
struct
{
unsigned char type;
unsigned int set_id;
unsigned int num_elm;
}
add_glyphs;
struct
{
unsigned char type;
unsigned char op;
unsigned int src_id;
unsigned int msk_id;
unsigned int dst_id;
unsigned short src_x;
unsigned short src_y;
unsigned short msk_x;
unsigned short msk_y;
unsigned short dst_x;
unsigned short dst_y;
unsigned short width;
unsigned short height;
}
composite;
struct
{
unsigned char type;
unsigned char op;
unsigned char num_elm;
unsigned int src_id;
unsigned int dst_id;
unsigned int format;
unsigned int set_id;
unsigned short src_x;
unsigned short src_y;
unsigned short offset_x;
unsigned short offset_y;
}
composite_glyphs;
struct
{
unsigned char type;
unsigned char op;
unsigned int dst_id;
}
fill_rectangles;
struct
{
unsigned char type;
unsigned char op;
unsigned int src_id;
unsigned int dst_id;
unsigned int format;
unsigned short src_x;
unsigned short src_y;
}
trapezoids;
struct
{
unsigned char type;
unsigned char op;
unsigned int src_id;
unsigned int dst_id;
unsigned int format;
unsigned short src_x;
unsigned short src_y;
}
triangles;
struct
{
unsigned char type;
unsigned char op;
unsigned char num_elm;
unsigned int src_id;
unsigned int dst_id;
unsigned int format;
unsigned int set_id;
unsigned short src_x;
unsigned short src_y;
unsigned short delta_x;
unsigned short delta_y;
}
composite_glyphs_compat;
}
data;
};
class RenderExtensionStore : public MessageStore
{
public:
RenderExtensionStore(StaticCompressor *compressor);
virtual ~RenderExtensionStore();
virtual const char *name() const
{
return "RenderExtension";
}
virtual unsigned char opcode() const
{
return opcode_;
}
virtual unsigned int storage() const
{
return sizeof(RenderExtensionMessage);
}
//
// Message handling methods.
//
public:
virtual Message *create() const
{
return new RenderExtensionMessage();
}
virtual Message *create(const Message &message) const
{
return new RenderExtensionMessage((const RenderExtensionMessage &) message);
}
virtual void destroy(Message *message) const
{
delete (RenderExtensionMessage *) message;
}
//
// Determine if the message must be stored
// in the cache.
//
virtual int validateMessage(const unsigned char *buffer, int size);
//
// Since protocol step 5 these methods are
// specialized in their minor opcode stores.
//
virtual int identitySize(const unsigned char *buffer, unsigned int size);
virtual int encodeIdentity(EncodeBuffer &encodeBuffer, const unsigned char *buffer,
const unsigned int size, int bigEndian,
ChannelCache *channelCache) const;
virtual int decodeIdentity(DecodeBuffer &decodeBuffer, unsigned char *&buffer,
unsigned int &size, int bigEndian, WriteBuffer *writeBuffer,
ChannelCache *channelCache) const;
virtual int parseIdentity(Message *message, const unsigned char *buffer,
unsigned int size, int bigEndian) const;
virtual int unparseIdentity(const Message *message, unsigned char *buffer,
unsigned int size, int bigEndian) const;
virtual void updateIdentity(EncodeBuffer &encodeBuffer, const Message *message,
const Message *cachedMessage,
ChannelCache *channelCache) const;
virtual void updateIdentity(DecodeBuffer &decodeBuffer, const Message *message,
ChannelCache *channelCache) const;
virtual void identityChecksum(const Message *message, const unsigned char *buffer,
unsigned int size, int bigEndian) const;
virtual void dumpIdentity(const Message *message) const;
private:
unsigned char opcode_;
//
// Keep pointers to specialized classes.
//
RenderMinorExtensionStore *minors_[RENDEREXTENSION_MINOR_OPCODE_LIMIT];
RenderMinorExtensionStore *generic_;
};
class RenderMinorExtensionStore : public MinorMessageStore
{
public:
virtual const char *name() const = 0;
virtual int identitySize(const unsigned char *buffer, unsigned int size) = 0;
virtual int encodeMessage(EncodeBuffer &encodeBuffer, const unsigned char *buffer,
const unsigned int size, int bigEndian,
ChannelCache *channelCache) const = 0;
virtual int decodeMessage(DecodeBuffer &decodeBuffer, unsigned char *&buffer,
unsigned int &size, unsigned char type, int bigEndian,
WriteBuffer *writeBuffer, ChannelCache *channelCache) const = 0;
virtual int parseIdentity(Message *message, const unsigned char *buffer,
unsigned int size, int bigEndian) const = 0;
virtual int unparseIdentity(const Message *message, unsigned char *buffer,
unsigned int size, int bigEndian) const = 0;
virtual void updateIdentity(EncodeBuffer &encodeBuffer, const Message *message,
const Message *cachedMessage,
ChannelCache *channelCache) const = 0;
virtual void updateIdentity(DecodeBuffer &decodeBuffer, const Message *message,
ChannelCache *channelCache) const = 0;
virtual void identityChecksum(const Message *message, const unsigned char *buffer,
unsigned int size, md5_state_t *md5_state,
int bigEndian) const = 0;
//
// Internal encode and decode utilities.
//
protected:
void encodeLongData(EncodeBuffer &encodeBuffer, const unsigned char *buffer,
unsigned int offset, unsigned int size, int bigEndian,
ChannelCache *channelCache) const;
void encodeIntData(EncodeBuffer &encodeBuffer, const unsigned char *buffer,
unsigned int offset, unsigned int size, int bigEndian,
ChannelCache *channelCache) const;
void encodeCharData(EncodeBuffer &encodeBuffer, const unsigned char *buffer,
unsigned int offset, unsigned int size, int bigEndian,
ChannelCache *channelCache) const;
void decodeLongData(DecodeBuffer &decodeBuffer, unsigned char *buffer,
unsigned int offset, unsigned int size, int bigEndian,
ChannelCache *channelCache) const;
void decodeIntData(DecodeBuffer &decodeBuffer, unsigned char *buffer,
unsigned int offset, unsigned int size, int bigEndian,
ChannelCache *channelCache) const;
void decodeCharData(DecodeBuffer &decodeBuffer, unsigned char *buffer,
unsigned int offset, unsigned int size, int bigEndian,
ChannelCache *channelCache) const;
/*
* The following methods are only used in the
* encoding of the generic render request. To
* be removed in future.
*/
void parseIntData(const Message *message, const unsigned char *buffer,
unsigned int offset, unsigned int size,
int bigEndian) const;
void unparseIntData(const Message *message, unsigned char *buffer,
unsigned int offset, unsigned int size,
int bigEndian) const;
void updateIntData(EncodeBuffer &encodeBuffer, const Message *message,
const Message *cachedMessage, unsigned int offset,
unsigned int size, ChannelCache *channelCache) const;
void updateIntData(DecodeBuffer &decodeBuffer, const Message *message,
unsigned int offset, unsigned int size,
ChannelCache *channelCache) const;
};
#endif /* RenderExtension_H */
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