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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_SLOTS 6000
+#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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