| 1 | /* Copyright (c) 2001, Stanford University
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| 2 | * All rights reserved.
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| 3 | *
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| 4 | * See the file LICENSE.txt for information on redistributing this software.
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| 5 | */
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| 6 |
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| 7 | #ifndef CR_PROTOCOL_H
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| 8 | #define CR_PROTOCOL_H
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| 9 |
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| 10 | #include <iprt/cdefs.h>
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| 11 |
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| 12 | #ifdef __cplusplus
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| 13 | extern "C" {
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| 14 | #endif
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| 15 |
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| 16 | typedef enum {
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| 17 | /* first message types is 'wGL\001', so we can immediately
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| 18 | recognize bad message types */
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| 19 | CR_MESSAGE_OPCODES = 0x77474c01,
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| 20 | CR_MESSAGE_WRITEBACK,
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| 21 | CR_MESSAGE_READBACK,
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| 22 | CR_MESSAGE_READ_PIXELS,
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| 23 | CR_MESSAGE_MULTI_BODY,
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| 24 | CR_MESSAGE_MULTI_TAIL,
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| 25 | CR_MESSAGE_FLOW_CONTROL,
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| 26 | CR_MESSAGE_OOB,
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| 27 | CR_MESSAGE_NEWCLIENT,
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| 28 | CR_MESSAGE_GATHER,
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| 29 | CR_MESSAGE_ERROR,
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| 30 | CR_MESSAGE_CRUT,
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| 31 | CR_MESSAGE_REDIR_PTR
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| 32 | } CRMessageType;
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| 33 |
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| 34 | typedef union {
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| 35 | /* pointers are usually 4 bytes, but on 64-bit machines (Alpha,
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| 36 | * SGI-n64, etc.) they are 8 bytes. Pass network pointers around
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| 37 | * as an opaque array of bytes, since the interpretation & size of
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| 38 | * the pointer only matter to the machine which emitted the
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| 39 | * pointer (and will eventually receive the pointer back again) */
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| 40 | unsigned int ptrAlign[2];
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| 41 | unsigned char ptrSize[8];
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| 42 | /* hack to make this packet big */
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| 43 | /* unsigned int junk[512]; */
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| 44 | } CRNetworkPointer;
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| 45 |
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| 46 | typedef struct {
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| 47 | CRMessageType type;
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| 48 | unsigned int conn_id;
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| 49 | } CRMessageHeader;
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| 50 |
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| 51 | typedef struct CRMessageOpcodes {
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| 52 | CRMessageHeader header;
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| 53 | unsigned int numOpcodes;
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| 54 | } CRMessageOpcodes;
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| 55 |
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| 56 | typedef struct CRMessageRedirPtr {
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| 57 | CRMessageHeader header;
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| 58 | CRMessageHeader* pMessage;
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| 59 | } CRMessageRedirPtr;
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| 60 |
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| 61 | typedef struct CRMessageWriteback {
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| 62 | CRMessageHeader header;
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| 63 | CRNetworkPointer writeback_ptr;
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| 64 | } CRMessageWriteback;
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| 65 |
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| 66 | typedef struct CRMessageReadback {
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| 67 | CRMessageHeader header;
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| 68 | CRNetworkPointer writeback_ptr;
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| 69 | CRNetworkPointer readback_ptr;
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| 70 | } CRMessageReadback;
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| 71 |
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| 72 | typedef struct CRMessageMulti {
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| 73 | CRMessageHeader header;
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| 74 | } CRMessageMulti;
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| 75 |
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| 76 | typedef struct CRMessageFlowControl {
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| 77 | CRMessageHeader header;
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| 78 | unsigned int credits;
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| 79 | } CRMessageFlowControl;
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| 80 |
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| 81 | typedef struct CRMessageReadPixels {
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| 82 | CRMessageHeader header;
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| 83 | int width, height;
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| 84 | unsigned int bytes_per_row;
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| 85 | unsigned int stride;
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| 86 | int alignment;
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| 87 | int skipRows;
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| 88 | int skipPixels;
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| 89 | int rowLength;
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| 90 | int format;
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| 91 | int type;
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| 92 | CRNetworkPointer pixels;
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| 93 | } CRMessageReadPixels;
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| 94 |
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| 95 | typedef struct CRMessageNewClient {
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| 96 | CRMessageHeader header;
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| 97 | } CRMessageNewClient;
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| 98 |
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| 99 | typedef struct CRMessageGather {
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| 100 | CRMessageHeader header;
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| 101 | unsigned long offset;
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| 102 | unsigned long len;
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| 103 | } CRMessageGather;
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| 104 |
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| 105 | typedef union {
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| 106 | CRMessageHeader header;
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| 107 | CRMessageOpcodes opcodes;
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| 108 | CRMessageRedirPtr redirptr;
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| 109 | CRMessageWriteback writeback;
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| 110 | CRMessageReadback readback;
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| 111 | CRMessageReadPixels readPixels;
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| 112 | CRMessageMulti multi;
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| 113 | CRMessageFlowControl flowControl;
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| 114 | CRMessageNewClient newclient;
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| 115 | CRMessageGather gather;
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| 116 | } CRMessage;
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| 117 |
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| 118 | DECLEXPORT(void) crNetworkPointerWrite( CRNetworkPointer *dst, void *src );
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| 119 |
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| 120 | #ifdef __cplusplus
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| 121 | }
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| 122 | #endif
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| 123 |
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| 124 | #endif /* CR_PROTOCOL_H */
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