自学教程：C++ CR_GET_PACKER_CONTEXT函数代码示例

void PACK_APIENTRY crPackCombinerParameterfvNV( GLenum pname, const GLfloat *params ){    CR_GET_PACKER_CONTEXT(pc);    if (__handleCombinerParameterData( pname, params, CR_COMBINERPARAMETERFVNV_EXTEND_OPCODE ))        WRITE_OPCODE( pc, CR_EXTEND_OPCODE );    CR_UNLOCK_PACKER_CONTEXT(pc);}

int crPackCanHoldBoundedBuffer( const CRPackBuffer *src ){	const int len_aligned = (src->data_current - src->opcode_current - 1 + 3) & ~3;	CR_GET_PACKER_CONTEXT(pc);	/* 24 is the size of the bounds-info packet... */	return crPackCanHoldOpcode( pc, 1, len_aligned + 24 );}

void PACK_APIENTRYcrPackAreProgramsResidentNV(GLsizei n, const GLuint * programs,                                                        GLboolean *residences, GLboolean *return_val,                                                        int *writeback){    CR_GET_PACKER_CONTEXT(pc);    unsigned char *data_ptr;    int packet_length;    (void) return_val; /* Caller must compute this from residences!!! */    packet_length = sizeof(int) +   /* packet length */        sizeof(GLenum) +                        /* extend opcode */        sizeof(n) +                                 /* num programs */        n * sizeof(*programs) +         /* programs */        8 + 8;    CR_GET_BUFFERED_POINTER(pc, packet_length);    WRITE_DATA(0, int, packet_length);    WRITE_DATA(4, GLenum, CR_AREPROGRAMSRESIDENTNV_EXTEND_OPCODE);    WRITE_DATA(8, GLsizei, n);    crMemcpy(data_ptr + 12, programs, n * sizeof(*programs));    WRITE_NETWORK_POINTER(12 + n * sizeof(*programs),   (void *) residences);    WRITE_NETWORK_POINTER(20 + n * sizeof(*programs), (void *) writeback);    WRITE_OPCODE(pc, CR_EXTEND_OPCODE);    CR_CMDBLOCK_CHECK_FLUSH(pc);    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackLoadTransposeMatrixfARB( const GLfloat *m ){    CR_GET_PACKER_CONTEXT(pc);    unsigned char *data_ptr;    int packet_length = 16*sizeof( *m ) + sizeof(GLint) + sizeof(GLenum);    CR_GET_BUFFERED_POINTER(pc, packet_length );    WRITE_DATA( 0, GLint, packet_length );    WRITE_DATA( 4, GLenum, CR_LOADTRANSPOSEMATRIXFARB_EXTEND_OPCODE );    WRITE_DATA( 8 + 0*sizeof(GLfloat), GLfloat, m[ 0] );    WRITE_DATA( 8 + 1*sizeof(GLfloat), GLfloat, m[ 1] );    WRITE_DATA( 8 + 2*sizeof(GLfloat), GLfloat, m[ 2] );    WRITE_DATA( 8 + 3*sizeof(GLfloat), GLfloat, m[ 3] );    WRITE_DATA( 8 + 4*sizeof(GLfloat), GLfloat, m[ 4] );    WRITE_DATA( 8 + 5*sizeof(GLfloat), GLfloat, m[ 5] );    WRITE_DATA( 8 + 6*sizeof(GLfloat), GLfloat, m[ 6] );    WRITE_DATA( 8 + 7*sizeof(GLfloat), GLfloat, m[ 7] );    WRITE_DATA( 8 + 8*sizeof(GLfloat), GLfloat, m[ 8] );    WRITE_DATA( 8 + 9*sizeof(GLfloat), GLfloat, m[ 9] );    WRITE_DATA( 8 + 10*sizeof(GLfloat), GLfloat, m[10] );    WRITE_DATA( 8 + 11*sizeof(GLfloat), GLfloat, m[11] );    WRITE_DATA( 8 + 12*sizeof(GLfloat), GLfloat, m[12] );    WRITE_DATA( 8 + 13*sizeof(GLfloat), GLfloat, m[13] );    WRITE_DATA( 8 + 14*sizeof(GLfloat), GLfloat, m[14] );    WRITE_DATA( 8 + 15*sizeof(GLfloat), GLfloat, m[15] );    WRITE_OPCODE( pc, CR_EXTEND_OPCODE );    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackLightfvSWAP (GLenum light, GLenum pname, const GLfloat *params){    CR_GET_PACKER_CONTEXT(pc);    if (__handleLightData( light, pname, params ))        WRITE_OPCODE( pc, CR_LIGHTFV_OPCODE );    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackPolygonStipple( const GLubyte *mask ){    CR_GET_PACKER_CONTEXT(pc);    unsigned char *data_ptr;    int nodata = crStateIsBufferBound(GL_PIXEL_UNPACK_BUFFER_ARB);    int packet_length = sizeof(int);    if (nodata)        packet_length += sizeof(GLint);    else        packet_length += 32*32/8;    CR_GET_BUFFERED_POINTER(pc, packet_length );    WRITE_DATA_AI(int, nodata);    if (nodata)    {        WRITE_DATA_AI(GLint, (GLint)(uintptr_t)mask);    }    else    {       crMemcpy( data_ptr, mask, 32*32/8 );    }    WRITE_OPCODE( pc, CR_POLYGONSTIPPLE_OPCODE );    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackLoadMatrixf( const GLfloat *m ){    CR_GET_PACKER_CONTEXT(pc);    unsigned char *data_ptr;    int packet_length = 16*sizeof( *m );    CR_GET_BUFFERED_POINTER(pc, packet_length );    WRITE_DATA( 0*sizeof(GLfloat), GLfloat, m[ 0] );    WRITE_DATA( 1*sizeof(GLfloat), GLfloat, m[ 1] );    WRITE_DATA( 2*sizeof(GLfloat), GLfloat, m[ 2] );    WRITE_DATA( 3*sizeof(GLfloat), GLfloat, m[ 3] );    WRITE_DATA( 4*sizeof(GLfloat), GLfloat, m[ 4] );    WRITE_DATA( 5*sizeof(GLfloat), GLfloat, m[ 5] );    WRITE_DATA( 6*sizeof(GLfloat), GLfloat, m[ 6] );    WRITE_DATA( 7*sizeof(GLfloat), GLfloat, m[ 7] );    WRITE_DATA( 8*sizeof(GLfloat), GLfloat, m[ 8] );    WRITE_DATA( 9*sizeof(GLfloat), GLfloat, m[ 9] );    WRITE_DATA( 10*sizeof(GLfloat), GLfloat, m[10] );    WRITE_DATA( 11*sizeof(GLfloat), GLfloat, m[11] );    WRITE_DATA( 12*sizeof(GLfloat), GLfloat, m[12] );    WRITE_DATA( 13*sizeof(GLfloat), GLfloat, m[13] );    WRITE_DATA( 14*sizeof(GLfloat), GLfloat, m[14] );    WRITE_DATA( 15*sizeof(GLfloat), GLfloat, m[15] );    WRITE_OPCODE( pc, CR_LOADMATRIXF_OPCODE );    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackWindowVisibleRegion( CR_PACKER_CONTEXT_ARGDECL GLint window, GLint cRects, const GLint * pRects ){    GLint i, size, cnt;    CR_GET_PACKER_CONTEXT(pc);    unsigned char *data_ptr;    (void) pc;    size = 16 + cRects * 4 * sizeof(GLint);    CR_GET_BUFFERED_POINTER( pc, size );    WRITE_DATA( 0, GLint, size );    WRITE_DATA( 4, GLenum, CR_WINDOWVISIBLEREGION_EXTEND_OPCODE );    WRITE_DATA( 8, GLint, window );    WRITE_DATA( 12, GLint, cRects );    cnt = 16;    for (i=0; i<cRects; ++i)    {        WRITE_DATA(cnt, GLint, (GLint) pRects[4*i+0]);        WRITE_DATA(cnt+4, GLint, (GLint) pRects[4*i+1]);        WRITE_DATA(cnt+8, GLint, (GLint) pRects[4*i+2]);        WRITE_DATA(cnt+12, GLint, (GLint) pRects[4*i+3]);        cnt += 16;    }    WRITE_OPCODE( pc, CR_EXTEND_OPCODE );    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackMultMatrixd( const GLdouble *m ){    CR_GET_PACKER_CONTEXT(pc);    unsigned char *data_ptr;    int packet_length = 16*sizeof( *m );    CR_GET_BUFFERED_POINTER(pc, packet_length );    WRITE_DOUBLE( 0*sizeof(double), m[ 0] );    WRITE_DOUBLE( 1*sizeof(double), m[ 1] );    WRITE_DOUBLE( 2*sizeof(double), m[ 2] );    WRITE_DOUBLE( 3*sizeof(double), m[ 3] );    WRITE_DOUBLE( 4*sizeof(double), m[ 4] );    WRITE_DOUBLE( 5*sizeof(double), m[ 5] );    WRITE_DOUBLE( 6*sizeof(double), m[ 6] );    WRITE_DOUBLE( 7*sizeof(double), m[ 7] );    WRITE_DOUBLE( 8*sizeof(double), m[ 8] );    WRITE_DOUBLE( 9*sizeof(double), m[ 9] );    WRITE_DOUBLE( 10*sizeof(double), m[10] );    WRITE_DOUBLE( 11*sizeof(double), m[11] );    WRITE_DOUBLE( 12*sizeof(double), m[12] );    WRITE_DOUBLE( 13*sizeof(double), m[13] );    WRITE_DOUBLE( 14*sizeof(double), m[14] );    WRITE_DOUBLE( 15*sizeof(double), m[15] );    WRITE_OPCODE( pc, CR_MULTMATRIXD_OPCODE );    CR_UNLOCK_PACKER_CONTEXT(pc);}

static GLboolean __handleLightModelData( GLenum pname, const GLfloat *params ){    CR_GET_PACKER_CONTEXT(pc);    unsigned int packet_length = sizeof( int ) + sizeof( pname );    unsigned int params_length = 0;    unsigned char *data_ptr;    switch( pname )    {        case GL_LIGHT_MODEL_AMBIENT:            params_length = 4*sizeof( *params );            break;        case GL_LIGHT_MODEL_TWO_SIDE:        case GL_LIGHT_MODEL_LOCAL_VIEWER:            params_length = sizeof( *params );            break;        default:            __PackError( __LINE__, __FILE__, GL_INVALID_ENUM,                                     "crPackLightModelSWAP(bad pname)" );            return GL_FALSE;    }    packet_length += params_length;    CR_GET_BUFFERED_POINTER(pc, packet_length );    WRITE_DATA( 0, int, SWAP32(packet_length) );    WRITE_DATA( sizeof( int ) + 0, GLenum, SWAP32(pname) );    WRITE_DATA( sizeof( int ) + 4, GLuint, SWAPFLOAT(params[0]) );    if (params_length > sizeof( *params ))    {        WRITE_DATA( sizeof( int ) + 8, GLuint, SWAPFLOAT(params[1]) );        WRITE_DATA( sizeof( int ) + 12, GLuint, SWAPFLOAT(params[2]) );        WRITE_DATA( sizeof( int ) + 16, GLuint, SWAPFLOAT(params[3]) );    }    return GL_TRUE;}

void PACK_APIENTRY crPackRequestResidentProgramsNV(GLsizei n, const GLuint *ids){    CR_GET_PACKER_CONTEXT(pc);    (void) pc;    (void) n;    (void) ids;    /* We're no-op'ing this function for now. */}

void PACK_APIENTRY crPackDrawBuffersSWAP(GLsizei n, const GLenum *bufs){    CR_GET_PACKER_CONTEXT(pc);    (void)n;    (void)bufs;    (void)pc;    crError ("No swap version");}

void PACK_APIENTRY crPackLightivSWAP (GLenum light, GLenum pname, const GLint *params){    /* floats and ints are the same size, so the packing should be the same */    CR_GET_PACKER_CONTEXT(pc);    if (__handleLightData( light, pname, (const GLfloat *) params ))        WRITE_OPCODE( pc, CR_LIGHTIV_OPCODE );    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackCombinerParameterivNV( GLenum pname, const GLint *params ){    /* floats and ints are the same size, so the packing should be the same */    CR_GET_PACKER_CONTEXT(pc);    if (__handleCombinerParameterData( pname, (const GLfloat *) params, CR_COMBINERPARAMETERIVNV_EXTEND_OPCODE ))        WRITE_OPCODE( pc, CR_EXTEND_OPCODE );    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackUniform4ivSWAP(GLint location, GLsizei count, const GLint *value){    CR_GET_PACKER_CONTEXT(pc);    (void)location;    (void)count;    (void)value;    (void)pc;    crError ("No swap version");}

void PACK_APIENTRY crPackBindAttribLocationSWAP(GLuint program, GLuint index, const char *name){    CR_GET_PACKER_CONTEXT(pc);    (void)program;    (void)index;    (void)name;    (void)pc;    crError ("No swap version");}

void PACK_APIENTRY crPackShaderSourceSWAP(GLuint shader, GLsizei count, const char **string, const GLint *length){    CR_GET_PACKER_CONTEXT(pc);    (void)shader;    (void)count;    (void)string;    (void)length;    (void)pc;    crError ("No swap version");}

void PACK_APIENTRY crPackUniformMatrix4x3fvSWAP(GLint location, GLsizei count, GLboolean transpose, const GLfloat *value){    CR_GET_PACKER_CONTEXT(pc);    (void)location;    (void)count;    (void)transpose;    (void)value;    (void)pc;    crError ("No swap version");}

void PACK_APIENTRY crPackGetUniformLocationSWAP(GLuint program, const char * name, GLint * return_value, int * writeback){    CR_GET_PACKER_CONTEXT(pc);    (void)program;    (void)name;    (void)return_value;    (void)writeback;    (void)pc;    crError ("No swap version");}

int crPackCanHoldBuffer( const CRPackBuffer *src ){	const int num_data = crPackNumData(src);	const int num_opcode = crPackNumOpcodes(src);    int res;	CR_GET_PACKER_CONTEXT(pc);    CR_LOCK_PACKER_CONTEXT(pc);	res = crPackCanHoldOpcode( pc, num_opcode, num_data );    CR_UNLOCK_PACKER_CONTEXT(pc);    return res;}

void PACK_APIENTRY crPackEndListSWAP( void ){    CR_GET_PACKER_CONTEXT(pc);    unsigned char *data_ptr;    (void) pc;    CR_GET_BUFFERED_POINTER( pc, 8 );    WRITE_DATA( 0, GLint, SWAP32(8) );    WRITE_DATA( 4, GLenum, SWAP32(CR_ENDLIST_EXTEND_OPCODE) );    WRITE_OPCODE( pc, CR_EXTEND_OPCODE );    pc->buffer.in_List = GL_FALSE;    CR_UNLOCK_PACKER_CONTEXT(pc);}

/* * Transmit a packet which was allocated with crPackAlloc. */void crHugePacket( CROpcode opcode, void *packet ){	CR_GET_PACKER_CONTEXT(pc);#ifndef CHROMIUM_THREADSAFE	CRASSERT(sanityCheckPointer == packet);	sanityCheckPointer = NULL;#endif	if ( IS_BUFFERED( packet ) )		WRITE_OPCODE( pc, opcode );	else		pc->SendHuge( opcode, packet );}

void PACK_APIENTRY crPackEdgeFlagPointer( GLsizei stride, const GLvoid *pointer ){	CR_GET_PACKER_CONTEXT(pc);	unsigned char *data_ptr;	int packet_length = 16;	CR_GET_BUFFERED_POINTER( pc, packet_length );	WRITE_DATA( 0, GLint, packet_length );	WRITE_DATA( 4, GLenum, CR_EDGEFLAGPOINTER_EXTEND_OPCODE );	WRITE_DATA( 8, GLsizei, stride );	WRITE_DATA( 12, GLuint, (GLuint) ((uintptr_t) pointer) );	WRITE_OPCODE( pc, CR_EXTEND_OPCODE );    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackFogCoordPointerEXT( GLenum type, GLsizei stride, const GLvoid * pointer ){	CR_GET_PACKER_CONTEXT(pc);	unsigned char *data_ptr;	int packet_length = 20;	CR_GET_BUFFERED_POINTER( pc, packet_length );	WRITE_DATA( 0, GLint, packet_length );	WRITE_DATA( 4, GLenum, CR_FOGCOORDPOINTEREXT_EXTEND_OPCODE );	WRITE_DATA( 8, GLenum, type );	WRITE_DATA( 12, GLsizei, stride );	WRITE_DATA( 16, GLuint, (GLuint) ((uintptr_t) pointer) );	WRITE_OPCODE( pc, CR_EXTEND_OPCODE );    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackInterleavedArrays( GLenum format, GLsizei stride, const GLvoid *pointer ){	CR_GET_PACKER_CONTEXT(pc);	unsigned char *data_ptr;	int packet_length = 20;	CR_GET_BUFFERED_POINTER( pc, packet_length );	WRITE_DATA( 0, GLint, packet_length );	WRITE_DATA( 4, GLenum, CR_INTERLEAVEDARRAYS_EXTEND_OPCODE );	WRITE_DATA( 8, GLenum, format );	WRITE_DATA( 12, GLsizei, stride );	WRITE_DATA( 16, GLuint, (GLuint) ((uintptr_t) pointer) );	WRITE_OPCODE( pc, CR_EXTEND_OPCODE );    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackDrawBuffers(GLsizei n, const GLenum *bufs){    CR_GET_PACKER_CONTEXT(pc);    unsigned char *data_ptr;    int packet_length = sizeof(int)+sizeof(GLenum)+sizeof(n) + n*sizeof(*bufs);    CR_GET_BUFFERED_POINTER(pc, packet_length);    WRITE_DATA_AI(int, packet_length);    WRITE_DATA_AI(GLenum, CR_DRAWBUFFERS_EXTEND_OPCODE);    WRITE_DATA_AI(GLsizei, n);    crMemcpy(data_ptr, bufs, n*sizeof(*bufs));    WRITE_OPCODE(pc, CR_EXTEND_OPCODE);    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackReadPixels(GLint x, GLint y, GLsizei width,                                     GLsizei height, GLenum format,                                    GLenum type, GLvoid *pixels,                                    const CRPixelPackState *packstate,                                    int *writeback){    CR_GET_PACKER_CONTEXT(pc);    unsigned char *data_ptr;    GLint stride = 0;    GLint bytes_per_row;    int bytes_per_pixel;    *writeback = 0;    bytes_per_pixel = crPixelSize(format, type);    if (bytes_per_pixel <= 0) {        char string[80];        sprintf(string, "crPackReadPixels(format 0x%x or type 0x%x)", format, type);        __PackError(__LINE__, __FILE__, GL_INVALID_ENUM, string);        return;    }    /* default bytes_per_row so crserver can allocate memory */    bytes_per_row = width * bytes_per_pixel;    stride = bytes_per_row;    if (packstate->alignment != 1) {         GLint remainder = bytes_per_row % packstate->alignment;         if (remainder)                stride = bytes_per_row + (packstate->alignment - remainder);    }    CR_GET_BUFFERED_POINTER(pc, 48 + sizeof(CRNetworkPointer) );    WRITE_DATA( 0,  GLint,  x );    WRITE_DATA( 4,  GLint,  y );    WRITE_DATA( 8,  GLsizei,  width );    WRITE_DATA( 12, GLsizei,  height );    WRITE_DATA( 16, GLenum, format );    WRITE_DATA( 20, GLenum, type );    WRITE_DATA( 24, GLint,  stride ); /* XXX not really used! */    WRITE_DATA( 28, GLint, packstate->alignment );    WRITE_DATA( 32, GLint, packstate->skipRows );    WRITE_DATA( 36, GLint, packstate->skipPixels );    WRITE_DATA( 40, GLint, bytes_per_row );    WRITE_DATA( 44, GLint, packstate->rowLength );    WRITE_NETWORK_POINTER( 48, (char *) pixels );    WRITE_OPCODE( pc, CR_READPIXELS_OPCODE );    CR_CMDBLOCK_CHECK_FLUSH(pc);    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackGetInfoLogARB(GLhandleARB obj, GLsizei maxLength, GLsizei * length, GLcharARB * infoLog, int * writeback){	CR_GET_PACKER_CONTEXT(pc);	unsigned char *data_ptr;	(void) pc;	CR_GET_BUFFERED_POINTER(pc, 32);	WRITE_DATA(0, GLint, 32);	WRITE_DATA(4, GLenum, CR_GETINFOLOGARB_EXTEND_OPCODE);	WRITE_DATA(8, GLhandleARB, obj);	WRITE_DATA(12, GLsizei, maxLength);	WRITE_NETWORK_POINTER(16, (void *) length);	WRITE_NETWORK_POINTER(24, (void *) writeback);	WRITE_OPCODE(pc, CR_EXTEND_OPCODE);    CR_UNLOCK_PACKER_CONTEXT(pc);}

void PACK_APIENTRY crPackGetUniformsLocations(GLuint program, GLsizei maxcbData, GLsizei * cbData, GLvoid * pData, int * writeback){	CR_GET_PACKER_CONTEXT(pc);    unsigned char *data_ptr;    (void) pData;    CR_GET_BUFFERED_POINTER(pc, 32);    WRITE_DATA(0, GLint, 32);    WRITE_DATA(4, GLenum, CR_GETUNIFORMSLOCATIONS_EXTEND_OPCODE);    WRITE_DATA(8, GLuint, program);    WRITE_DATA(12, GLsizei, maxcbData);    WRITE_NETWORK_POINTER(16, (void *) cbData);    WRITE_NETWORK_POINTER(24, (void *) writeback);    WRITE_OPCODE(pc, CR_EXTEND_OPCODE);    CR_UNLOCK_PACKER_CONTEXT(pc);}