| 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_PACK_H
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| 8 | #define CR_PACK_H
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| 9 |
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| 10 | #include "cr_compiler.h"
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| 11 | #include "cr_error.h"
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| 12 | #include "cr_protocol.h"
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| 13 | #include "cr_opcodes.h"
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| 14 | #include "cr_endian.h"
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| 15 | #include "state/cr_statetypes.h"
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| 16 | #include "state/cr_currentpointers.h"
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| 17 | #include "state/cr_client.h"
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| 18 | #ifdef CHROMIUM_THREADSAFE
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| 19 | #include "cr_threads.h"
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| 20 | #endif
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| 21 |
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| 22 | #include <iprt/types.h>
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| 23 |
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| 24 | #ifdef __cplusplus
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| 25 | extern "C" {
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| 26 | #endif
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| 27 |
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| 28 | typedef struct CRPackContext_t CRPackContext;
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| 29 |
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| 30 | /**
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| 31 | * Packer buffer
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| 32 | */
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| 33 | typedef struct
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| 34 | {
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| 35 | void *pack; /**< the actual storage space/buffer */
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| 36 | unsigned int size; /**< size of pack[] buffer */
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| 37 | unsigned int mtu;
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| 38 | unsigned char *data_start, *data_current, *data_end;
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| 39 | unsigned char *opcode_start, *opcode_current, *opcode_end;
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| 40 | GLboolean geometry_only; /**< just used for debugging */
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| 41 | GLboolean holds_BeginEnd;
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| 42 | GLboolean in_BeginEnd;
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| 43 | GLboolean canBarf;
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| 44 | GLboolean holds_List;
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| 45 | GLboolean in_List;
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| 46 | CRPackContext *context;
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| 47 | } CRPackBuffer;
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| 48 |
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| 49 | typedef void (*CRPackFlushFunc)(void *arg);
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| 50 | typedef void (*CRPackSendHugeFunc)(CROpcode, void *);
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| 51 | typedef void (*CRPackErrorHandlerFunc)(int line, const char *file, GLenum error, const char *info);
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| 52 |
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| 53 |
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| 54 | /**
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| 55 | * Packer context
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| 56 | */
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| 57 | struct CRPackContext_t
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| 58 | {
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| 59 | CRPackBuffer buffer; /**< not a pointer, see comments in pack_buffer.c */
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| 60 | CRPackFlushFunc Flush;
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| 61 | void *flush_arg;
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| 62 | CRPackSendHugeFunc SendHuge;
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| 63 | CRPackErrorHandlerFunc Error;
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| 64 | CRCurrentStatePointers current;
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| 65 | GLvectorf bounds_min, bounds_max;
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| 66 | int updateBBOX;
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| 67 | int swapping;
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| 68 | CRPackBuffer *currentBuffer;
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| 69 | char *file; /**< for debugging only */
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| 70 | int line; /**< for debugging only */
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| 71 | };
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| 72 |
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| 73 |
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| 74 | extern DECLEXPORT(CRPackContext *) crPackNewContext(int swapping);
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| 75 | extern DECLEXPORT(void) crPackSetContext( CRPackContext *pc );
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| 76 | extern DECLEXPORT(CRPackContext *) crPackGetContext( void );
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| 77 |
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| 78 | extern DECLEXPORT(void) crPackSetBuffer( CRPackContext *pc, CRPackBuffer *buffer );
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| 79 | extern DECLEXPORT(void) crPackSetBufferDEBUG( const char *file, int line, CRPackContext *pc, CRPackBuffer *buffer );
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| 80 | extern DECLEXPORT(void) crPackReleaseBuffer( CRPackContext *pc );
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| 81 | extern DECLEXPORT(void) crPackResetPointers( CRPackContext *pc );
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| 82 |
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| 83 | extern DECLEXPORT(int) crPackMaxOpcodes( int buffer_size );
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| 84 | extern DECLEXPORT(int) crPackMaxData( int buffer_size );
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| 85 | extern DECLEXPORT(void) crPackInitBuffer( CRPackBuffer *buffer, void *buf, int size, int mtu );
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| 86 | extern DECLEXPORT(void) crPackFlushFunc( CRPackContext *pc, CRPackFlushFunc ff );
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| 87 | extern DECLEXPORT(void) crPackFlushArg( CRPackContext *pc, void *flush_arg );
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| 88 | extern DECLEXPORT(void) crPackSendHugeFunc( CRPackContext *pc, CRPackSendHugeFunc shf );
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| 89 | extern DECLEXPORT(void) crPackErrorFunction( CRPackContext *pc, CRPackErrorHandlerFunc errf );
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| 90 | extern DECLEXPORT(void) crPackOffsetCurrentPointers( int offset );
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| 91 | extern DECLEXPORT(void) crPackNullCurrentPointers( void );
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| 92 |
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| 93 | extern DECLEXPORT(void) crPackResetBoundingBox( CRPackContext *pc );
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| 94 | extern DECLEXPORT(GLboolean) crPackGetBoundingBox( CRPackContext *pc,
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| 95 | GLfloat *xmin, GLfloat *ymin, GLfloat *zmin,
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| 96 | GLfloat *xmax, GLfloat *ymax, GLfloat *zmax);
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| 97 |
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| 98 | extern DECLEXPORT(void) crPackAppendBuffer( const CRPackBuffer *buffer );
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| 99 | extern DECLEXPORT(void) crPackAppendBoundedBuffer( const CRPackBuffer *buffer, const CRrecti *bounds );
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| 100 | extern DECLEXPORT(int) crPackCanHoldBuffer( const CRPackBuffer *buffer );
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| 101 | extern DECLEXPORT(int) crPackCanHoldBoundedBuffer( const CRPackBuffer *buffer );
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| 102 |
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| 103 | #if defined(LINUX) || defined(WINDOWS)
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| 104 | #define CR_UNALIGNED_ACCESS_OKAY
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| 105 | #else
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| 106 | #undef CR_UNALIGNED_ACCESS_OKAY
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| 107 | #endif
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| 108 | extern DECLEXPORT(void) crWriteUnalignedDouble( void *buffer, double d );
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| 109 | extern DECLEXPORT(void) crWriteSwappedDouble( void *buffer, double d );
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| 110 |
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| 111 | extern DECLEXPORT(void) *crPackAlloc( unsigned int len );
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| 112 | extern DECLEXPORT(void) crHugePacket( CROpcode op, void *ptr );
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| 113 | extern DECLEXPORT(void) crPackFree( void *ptr );
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| 114 | extern DECLEXPORT(void) crNetworkPointerWrite( CRNetworkPointer *, void * );
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| 115 |
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| 116 | extern DECLEXPORT(void) crPackExpandDrawArrays(GLenum mode, GLint first, GLsizei count, CRClientState *c);
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| 117 | extern DECLEXPORT(void) crPackExpandDrawArraysSWAP(GLenum mode, GLint first, GLsizei count, CRClientState *c);
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| 118 |
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| 119 | extern DECLEXPORT(void) crPackUnrollDrawElements(GLsizei count, GLenum type, const GLvoid *indices);
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| 120 | extern DECLEXPORT(void) crPackUnrollDrawElementsSWAP(GLsizei count, GLenum type, const GLvoid *indices);
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| 121 |
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| 122 | extern DECLEXPORT(void) crPackExpandDrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, CRClientState *c);
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| 123 | extern DECLEXPORT(void) crPackExpandDrawElementsSWAP(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, CRClientState *c);
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| 124 |
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| 125 | extern DECLEXPORT(void) crPackExpandDrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices, CRClientState *c);
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| 126 | extern DECLEXPORT(void) crPackExpandDrawRangeElementsSWAP(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices, CRClientState *c);
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| 127 |
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| 128 | extern DECLEXPORT(void) crPackExpandArrayElement(GLint index, CRClientState *c);
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| 129 | extern DECLEXPORT(void) crPackExpandArrayElementSWAP(GLint index, CRClientState *c);
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| 130 |
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| 131 | extern DECLEXPORT(void) crPackExpandMultiDrawArraysEXT( GLenum mode, GLint *first, GLsizei *count, GLsizei primcount, CRClientState *c );
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| 132 | extern DECLEXPORT(void) crPackExpandMultiDrawArraysEXTSWAP( GLenum mode, GLint *first, GLsizei *count, GLsizei primcount, CRClientState *c );
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| 133 |
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| 134 | extern DECLEXPORT(void) crPackExpandMultiDrawElementsEXT( GLenum mode, const GLsizei *count, GLenum type, const GLvoid **indices, GLsizei primcount, CRClientState *c );
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| 135 | extern DECLEXPORT(void) crPackExpandMultiDrawElementsEXTSWAP( GLenum mode, const GLsizei *count, GLenum type, const GLvoid **indices, GLsizei primcount, CRClientState *c );
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| 136 |
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| 137 |
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| 138 | #ifdef CHROMIUM_THREADSAFE
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| 139 | extern CRtsd _PackerTSD;
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| 140 | #define GET_PACKER_CONTEXT(C) CRPackContext *C = (CRPackContext *) crGetTSD(&_PackerTSD)
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| 141 | #else
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| 142 | extern DLLDATA(CRPackContext) cr_packer_globals;
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| 143 | #define GET_PACKER_CONTEXT(C) CRPackContext *C = &cr_packer_globals
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| 144 | #endif
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| 145 |
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| 146 |
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| 147 | /**
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| 148 | * Return number of opcodes in given buffer.
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| 149 | */
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| 150 | static INLINE int
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| 151 | crPackNumOpcodes(const CRPackBuffer *buffer)
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| 152 | {
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| 153 | CRASSERT(buffer->opcode_start - buffer->opcode_current >= 0);
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| 154 | return buffer->opcode_start - buffer->opcode_current;
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| 155 | }
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| 156 |
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| 157 |
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| 158 | /**
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| 159 | * Return amount of data (in bytes) in buffer.
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| 160 | */
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| 161 | static INLINE int
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| 162 | crPackNumData(const CRPackBuffer *buffer)
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| 163 | {
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| 164 | CRASSERT(buffer->data_current - buffer->data_start >= 0);
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| 165 | return buffer->data_current - buffer->data_start; /* in bytes */
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| 166 | }
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| 167 |
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| 168 |
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| 169 | static INLINE int
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| 170 | crPackCanHoldOpcode(const CRPackContext *pc, int num_opcode, int num_data)
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| 171 | {
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| 172 | int fitsInMTU, opcodesFit, dataFits;
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| 173 |
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| 174 | CRASSERT(pc->currentBuffer);
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| 175 |
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| 176 | fitsInMTU = (((pc->buffer.data_current - pc->buffer.opcode_current - 1
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| 177 | + num_opcode + num_data
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| 178 | + 0x3 ) & ~0x3) + sizeof(CRMessageOpcodes)
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| 179 | <= pc->buffer.mtu);
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| 180 | opcodesFit = (pc->buffer.opcode_current - num_opcode >= pc->buffer.opcode_end);
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| 181 | dataFits = (pc->buffer.data_current + num_data <= pc->buffer.data_end);
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| 182 |
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| 183 | return fitsInMTU && opcodesFit && dataFits;
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| 184 | }
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| 185 |
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| 186 |
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| 187 | /**
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| 188 | * Alloc space for a message of 'len' bytes (plus 1 opcode).
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| 189 | * Only flush if buffer is full.
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| 190 | */
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| 191 | #define GET_BUFFERED_POINTER_NO_BEGINEND_FLUSH( pc, len ) \
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| 192 | do { \
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| 193 | THREADASSERT( pc ); \
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| 194 | CRASSERT( pc->currentBuffer ); \
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| 195 | if ( !crPackCanHoldOpcode( pc, 1, (len) ) ) { \
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| 196 | pc->Flush( pc->flush_arg ); \
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| 197 | CRASSERT(crPackCanHoldOpcode( pc, 1, (len) ) ); \
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| 198 | } \
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| 199 | data_ptr = pc->buffer.data_current; \
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| 200 | pc->buffer.data_current += (len); \
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| 201 | } while (0)
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| 202 |
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| 203 |
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| 204 | /**
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| 205 | * As above, flush if the buffer contains vertex data and we're
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| 206 | * no longer inside glBegin/glEnd.
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| 207 | */
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| 208 | #define GET_BUFFERED_POINTER( pc, len ) \
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| 209 | do { \
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| 210 | CRASSERT( pc->currentBuffer ); \
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| 211 | if ( pc->buffer.holds_BeginEnd && !pc->buffer.in_BeginEnd ) { \
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| 212 | pc->Flush( pc->flush_arg ); \
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| 213 | pc->buffer.holds_BeginEnd = 0; \
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| 214 | } \
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| 215 | GET_BUFFERED_POINTER_NO_BEGINEND_FLUSH( pc, len ); \
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| 216 | } while (0)
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| 217 |
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| 218 |
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| 219 | /**
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| 220 | * As above, but for vertex data between glBegin/End (counts vertices).
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| 221 | */
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| 222 | #define GET_BUFFERED_COUNT_POINTER( pc, len ) \
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| 223 | do { \
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| 224 | CRASSERT( pc->currentBuffer ); \
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| 225 | if ( !crPackCanHoldOpcode( pc, 1, (len) ) ) { \
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| 226 | pc->Flush( pc->flush_arg ); \
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| 227 | CRASSERT( crPackCanHoldOpcode( pc, 1, (len) ) ); \
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| 228 | } \
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| 229 | data_ptr = pc->buffer.data_current; \
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| 230 | pc->current.vtx_count++; \
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| 231 | pc->buffer.data_current += (len); \
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| 232 | } while (0)
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| 233 |
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| 234 |
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| 235 | /**
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| 236 | * Allocate space for a msg/command that has no arguments, such
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| 237 | * as glFinish().
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| 238 | */
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| 239 | #define GET_BUFFERED_POINTER_NO_ARGS( pc ) \
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| 240 | GET_BUFFERED_POINTER( pc, 4 ); \
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| 241 | WRITE_DATA( 0, GLuint, 0xdeadbeef )
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| 242 |
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| 243 | #define WRITE_DATA( offset, type, data ) \
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| 244 | *( (type *) (data_ptr + (offset))) = (data)
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| 245 |
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| 246 | /* Write data to current location and auto increment */
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| 247 | #define WRITE_DATA_AI(type, data) \
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| 248 | { \
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| 249 | *((type*) (data_ptr)) = (data); \
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| 250 | data_ptr += sizeof(type); \
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| 251 | }
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| 252 |
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| 253 | #ifdef CR_UNALIGNED_ACCESS_OKAY
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| 254 | #define WRITE_DOUBLE( offset, data ) \
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| 255 | WRITE_DATA( offset, GLdouble, data )
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| 256 | #else
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| 257 | #define WRITE_DOUBLE( offset, data ) \
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| 258 | crWriteUnalignedDouble( data_ptr + (offset), (data) )
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| 259 | #endif
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| 260 |
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| 261 | #define WRITE_SWAPPED_DOUBLE( offset, data ) \
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| 262 | crWriteSwappedDouble( data_ptr + (offset), (data) )
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| 263 |
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| 264 | #define WRITE_OPCODE( pc, opcode ) \
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| 265 | *(pc->buffer.opcode_current--) = (unsigned char) opcode
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| 266 |
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| 267 | #define WRITE_NETWORK_POINTER( offset, data ) \
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| 268 | crNetworkPointerWrite( (CRNetworkPointer *) ( data_ptr + (offset) ), (data) )
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| 269 |
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| 270 | #ifdef __cplusplus
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| 271 | }
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| 272 | #endif
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| 273 |
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| 274 | #endif /* CR_PACK_H */
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