pack_regcombiner.c revision a0d1e40cc56a54314af0a1a4b5e13905ffd78393
/* Copyright (c) 2001, Stanford University
* All rights reserved
*
* See the file LICENSE.txt for information on redistributing this software.
*/
#include "packer.h"
#include "cr_opcodes.h"
static GLboolean __handleCombinerParameterData( GLenum pname, const GLfloat *params, GLenum extended_opcode )
{
GET_PACKER_CONTEXT(pc);
unsigned int params_length = 0;
unsigned int packet_length = sizeof( int ) + sizeof( extended_opcode ) + sizeof( pname );
unsigned char *data_ptr;
switch( pname )
{
case GL_CONSTANT_COLOR0_NV:
case GL_CONSTANT_COLOR1_NV:
params_length = 4 * sizeof( *params );
break;
case GL_NUM_GENERAL_COMBINERS_NV:
case GL_COLOR_SUM_CLAMP_NV:
params_length = sizeof( *params );
break;
default:
__PackError( __LINE__, __FILE__, GL_INVALID_ENUM,
"crPackCombinerParameter(bad pname)" );
CRASSERT(0);
return GL_FALSE;
}
packet_length += params_length;
GET_BUFFERED_POINTER(pc, packet_length );
WRITE_DATA( 0, int, packet_length );
WRITE_DATA( sizeof( int ) + 0, GLenum, extended_opcode );
WRITE_DATA( sizeof( int ) + 4, GLenum, pname );
WRITE_DATA( sizeof( int ) + 8, GLfloat, params[0] );
if (params_length > sizeof( *params ))
{
WRITE_DATA( sizeof( int ) + 12, GLfloat, params[1] );
WRITE_DATA( sizeof( int ) + 16, GLfloat, params[2] );
WRITE_DATA( sizeof( int ) + 20, GLfloat, params[3] );
CRASSERT(packet_length == sizeof(int) + 20 + 4);
}
return GL_TRUE;
}
void PACK_APIENTRY crPackCombinerParameterfvNV( GLenum pname, const GLfloat *params )
{
GET_PACKER_CONTEXT(pc);
if (__handleCombinerParameterData( pname, params, CR_COMBINERPARAMETERFVNV_EXTEND_OPCODE ))
WRITE_OPCODE( pc, CR_EXTEND_OPCODE );
}
void PACK_APIENTRY crPackCombinerParameterivNV( GLenum pname, const GLint *params )
{
/* floats and ints are the same size, so the packing should be the same */
GET_PACKER_CONTEXT(pc);
if (__handleCombinerParameterData( pname, (const GLfloat *) params, CR_COMBINERPARAMETERIVNV_EXTEND_OPCODE ))
WRITE_OPCODE( pc, CR_EXTEND_OPCODE );
}
void PACK_APIENTRY crPackCombinerStageParameterfvNV( GLenum stage, GLenum pname, const GLfloat *params )
{
GET_PACKER_CONTEXT(pc);
unsigned char *data_ptr;
GET_BUFFERED_POINTER(pc, 32 );
WRITE_DATA( 0, GLint, 32 );
WRITE_DATA( 4, GLenum, CR_COMBINERSTAGEPARAMETERFVNV_EXTEND_OPCODE );
WRITE_DATA( 8, GLenum, stage );
WRITE_DATA( 12, GLenum, pname );
WRITE_DATA( 16, GLfloat, params[0] );
WRITE_DATA( 20, GLfloat, params[1] );
WRITE_DATA( 24, GLfloat, params[2] );
WRITE_DATA( 28, GLfloat, params[3] );
WRITE_OPCODE( pc, CR_EXTEND_OPCODE );
}