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cr_pack.h
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cr_pack.h
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/* Copyright (c) 2001, Stanford University
* All rights reserved.
*
* See the file LICENSE.txt for information on redistributing this software.
*/
#ifndef CR_PACK_H
#define CR_PACK_H
#include "cr_compiler.h"
#include "cr_error.h"
#include "cr_protocol.h"
#include "cr_opcodes.h"
#include "cr_endian.h"
#include "state/cr_statetypes.h"
#include "state/cr_currentpointers.h"
#include "state/cr_client.h"
#ifdef CHROMIUM_THREADSAFE
#include "cr_threads.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
typedef struct CRPackContext_t CRPackContext;
/**
* Packer buffer
*/
typedef struct
{
void *pack; /**< the actual storage space/buffer */
unsigned int size; /**< size of pack[] buffer */
unsigned int mtu;
unsigned char *data_start, *data_current, *data_end;
unsigned char *opcode_start, *opcode_current, *opcode_end;
GLboolean geometry_only; /**< just used for debugging */
GLboolean holds_BeginEnd;
GLboolean in_BeginEnd;
GLboolean canBarf;
GLboolean holds_List;
GLboolean in_List;
CRPackContext *context;
} CRPackBuffer;
typedef void (*CRPackFlushFunc)(void *arg);
typedef void (*CRPackSendHugeFunc)(CROpcode, void *);
typedef void (*CRPackErrorHandlerFunc)(int line, const char *file, GLenum error, const char *info);
/**
* Packer context
*/
struct CRPackContext_t
{
CRPackBuffer buffer; /**< not a pointer, see comments in pack_buffer.c */
CRPackFlushFunc Flush;
void *flush_arg;
CRPackSendHugeFunc SendHuge;
CRPackErrorHandlerFunc Error;
CRCurrentStatePointers current;
GLvectorf bounds_min, bounds_max;
int updateBBOX;
int swapping;
CRPackBuffer *currentBuffer;
char *file; /**< for debugging only */
int line; /**< for debugging only */
};
CRPackContext *crPackNewContext(int swapping);
void crPackSetContext( CRPackContext *pc );
CRPackContext *crPackGetContext( void );
void crPackSetBuffer( CRPackContext *pc, CRPackBuffer *buffer );
void crPackSetBufferDEBUG( const char *file, int line, CRPackContext *pc, CRPackBuffer *buffer );
void crPackReleaseBuffer( CRPackContext *pc );
void crPackResetPointers( CRPackContext *pc );
int crPackMaxOpcodes( int buffer_size );
int crPackMaxData( int buffer_size );
void crPackInitBuffer( CRPackBuffer *buffer, void *buf, int size, int mtu );
void crPackFlushFunc( CRPackContext *pc, CRPackFlushFunc ff );
void crPackFlushArg( CRPackContext *pc, void *flush_arg );
void crPackSendHugeFunc( CRPackContext *pc, CRPackSendHugeFunc shf );
void crPackErrorFunction( CRPackContext *pc, CRPackErrorHandlerFunc errf );
void crPackOffsetCurrentPointers( int offset );
void crPackNullCurrentPointers( void );
void crPackResetBoundingBox( CRPackContext *pc );
GLboolean crPackGetBoundingBox( CRPackContext *pc,
GLfloat *xmin, GLfloat *ymin, GLfloat *zmin,
GLfloat *xmax, GLfloat *ymax, GLfloat *zmax);
void crPackAppendBuffer( const CRPackBuffer *buffer );
void crPackAppendBoundedBuffer( const CRPackBuffer *buffer, const CRrecti *bounds );
int crPackCanHoldBuffer( const CRPackBuffer *buffer );
int crPackCanHoldBoundedBuffer( const CRPackBuffer *buffer );
#if defined(LINUX) || defined(WINDOWS)
#define CR_UNALIGNED_ACCESS_OKAY
#else
#undef CR_UNALIGNED_ACCESS_OKAY
#endif
void crWriteUnalignedDouble( void *buffer, double d );
void crWriteSwappedDouble( void *buffer, double d );
void *crPackAlloc( unsigned int len );
void crHugePacket( CROpcode op, void *ptr );
void crPackFree( void *ptr );
void crNetworkPointerWrite( CRNetworkPointer *, void * );
void crPackExpandDrawArrays(GLenum mode, GLint first, GLsizei count, CRClientState *c);
void crPackExpandDrawArraysSWAP(GLenum mode, GLint first, GLsizei count, CRClientState *c);
void crPackUnrollDrawElements(GLsizei count, GLenum type, const GLvoid *indices);
void crPackUnrollDrawElementsSWAP(GLsizei count, GLenum type, const GLvoid *indices);
void crPackExpandDrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, CRClientState *c);
void crPackExpandDrawElementsSWAP(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices, CRClientState *c);
void crPackExpandDrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices, CRClientState *c);
void crPackExpandDrawRangeElementsSWAP(GLenum mode, GLuint start, GLuint end, GLsizei count, GLenum type, const GLvoid *indices, CRClientState *c);
void crPackExpandArrayElement(GLint index, CRClientState *c);
void crPackExpandArrayElementSWAP(GLint index, CRClientState *c);
void crPackExpandMultiDrawArraysEXT( GLenum mode, GLint *first, GLsizei *count, GLsizei primcount, CRClientState *c );
void crPackExpandMultiDrawArraysEXTSWAP( GLenum mode, GLint *first, GLsizei *count, GLsizei primcount, CRClientState *c );
void crPackExpandMultiDrawElementsEXT( GLenum mode, const GLsizei *count, GLenum type, const GLvoid **indices, GLsizei primcount, CRClientState *c );
void crPackExpandMultiDrawElementsEXTSWAP( GLenum mode, const GLsizei *count, GLenum type, const GLvoid **indices, GLsizei primcount, CRClientState *c );
#ifdef CHROMIUM_THREADSAFE
extern CRtsd _PackerTSD;
#define GET_PACKER_CONTEXT(C) CRPackContext *C = (CRPackContext *) crGetTSD(&_PackerTSD)
#else
extern DLLDATA CRPackContext cr_packer_globals;
#define GET_PACKER_CONTEXT(C) CRPackContext *C = &cr_packer_globals
#endif
/**
* Return number of opcodes in given buffer.
*/
static INLINE int
crPackNumOpcodes(const CRPackBuffer *buffer)
{
CRASSERT(buffer->opcode_start - buffer->opcode_current >= 0);
return buffer->opcode_start - buffer->opcode_current;
}
/**
* Return amount of data (in bytes) in buffer.
*/
static INLINE int
crPackNumData(const CRPackBuffer *buffer)
{
CRASSERT(buffer->data_current - buffer->data_start >= 0);
return buffer->data_current - buffer->data_start; /* in bytes */
}
static INLINE int
crPackCanHoldOpcode(const CRPackContext *pc, int num_opcode, int num_data)
{
int fitsInMTU, opcodesFit, dataFits;
CRASSERT(pc->currentBuffer);
fitsInMTU = (((pc->buffer.data_current - pc->buffer.opcode_current - 1
+ num_opcode + num_data
+ 0x3 ) & ~0x3) + sizeof(CRMessageOpcodes)
<= pc->buffer.mtu);
opcodesFit = (pc->buffer.opcode_current - num_opcode >= pc->buffer.opcode_end);
dataFits = (pc->buffer.data_current + num_data <= pc->buffer.data_end);
return fitsInMTU && opcodesFit && dataFits;
}
/**
* Alloc space for a message of 'len' bytes (plus 1 opcode).
* Only flush if buffer is full.
*/
#define GET_BUFFERED_POINTER_NO_BEGINEND_FLUSH( pc, len ) \
do { \
THREADASSERT( pc ); \
CRASSERT( pc->currentBuffer ); \
if ( !crPackCanHoldOpcode( pc, 1, (len) ) ) { \
pc->Flush( pc->flush_arg ); \
CRASSERT(crPackCanHoldOpcode( pc, 1, (len) ) ); \
} \
data_ptr = pc->buffer.data_current; \
pc->buffer.data_current += (len); \
} while (0)
/**
* As above, flush if the buffer contains vertex data and we're
* no longer inside glBegin/glEnd.
*/
#define GET_BUFFERED_POINTER( pc, len ) \
do { \
CRASSERT( pc->currentBuffer ); \
if ( pc->buffer.holds_BeginEnd && !pc->buffer.in_BeginEnd ) { \
pc->Flush( pc->flush_arg ); \
pc->buffer.holds_BeginEnd = 0; \
} \
GET_BUFFERED_POINTER_NO_BEGINEND_FLUSH( pc, len ); \
} while (0)
/**
* As above, but for vertex data between glBegin/End (counts vertices).
*/
#define GET_BUFFERED_COUNT_POINTER( pc, len ) \
do { \
CRASSERT( pc->currentBuffer ); \
if ( !crPackCanHoldOpcode( pc, 1, (len) ) ) { \
pc->Flush( pc->flush_arg ); \
CRASSERT( crPackCanHoldOpcode( pc, 1, (len) ) ); \
} \
data_ptr = pc->buffer.data_current; \
pc->current.vtx_count++; \
pc->buffer.data_current += (len); \
} while (0)
/**
* Allocate space for a msg/command that has no arguments, such
* as glFinish().
*/
#define GET_BUFFERED_POINTER_NO_ARGS( pc ) \
GET_BUFFERED_POINTER( pc, 4 ); \
WRITE_DATA( 0, GLuint, 0xdeadbeef )
#define WRITE_DATA( offset, type, data ) \
*( (type *) (data_ptr + (offset))) = (data)
#ifdef CR_UNALIGNED_ACCESS_OKAY
#define WRITE_DOUBLE( offset, data ) \
WRITE_DATA( offset, GLdouble, data )
#else
#define WRITE_DOUBLE( offset, data ) \
crWriteUnalignedDouble( data_ptr + (offset), (data) )
#endif
#define WRITE_SWAPPED_DOUBLE( offset, data ) \
crWriteSwappedDouble( data_ptr + (offset), (data) )
#define WRITE_OPCODE( pc, opcode ) \
*(pc->buffer.opcode_current--) = (unsigned char) opcode
#define WRITE_NETWORK_POINTER( offset, data ) \
crNetworkPointerWrite( (CRNetworkPointer *) ( data_ptr + (offset) ), (data) )
#ifdef __cplusplus
}
#endif
#endif /* CR_PACK_H */