/* 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 __handleFogData( GLenum pname, const GLfloat *params )
{
	GET_PACKER_CONTEXT(pc);
	int params_length = 0;
	int packet_length = sizeof( int ) + sizeof( pname );
	unsigned char *data_ptr;
	switch( pname )
	{
		case GL_FOG_MODE:
		case GL_FOG_DENSITY:
		case GL_FOG_START:
		case GL_FOG_END:
		case GL_FOG_INDEX:
			params_length = sizeof( *params );
			break;
		case GL_FOG_COLOR:
			params_length = 4*sizeof( *params );
			break;
		default:
			params_length = __packFogParamsLength( pname );
			if (!params_length)
			{
				char msg[100];
				sprintf(msg, "Invalid pname in Fog: %d", (int) pname );
				__PackError( __LINE__, __FILE__, GL_INVALID_ENUM, msg);
				return GL_FALSE;
			}
			break;
	}
	packet_length += params_length;

	GET_BUFFERED_POINTER(pc, packet_length );
	WRITE_DATA( 0, int, packet_length );
	WRITE_DATA( 4, GLenum, pname );
	WRITE_DATA( 8, GLfloat, params[0] );
	if (packet_length > 12)
	{
		WRITE_DATA( 12, GLfloat, params[1] );
		WRITE_DATA( 16, GLfloat, params[2] );
		WRITE_DATA( 20, GLfloat, params[3] );
	}
	return GL_TRUE;
}

void PACK_APIENTRY crPackFogfv(GLenum pname, const GLfloat *params)
{
	GET_PACKER_CONTEXT(pc);
	if (__handleFogData( pname, params ))
		WRITE_OPCODE( pc, CR_FOGFV_OPCODE );
}

void PACK_APIENTRY crPackFogiv(GLenum pname, const GLint *params)
{
	GET_PACKER_CONTEXT(pc);
	/* floats and ints are the same size, so the packing should be the same */
	if (__handleFogData( pname, (const GLfloat *) params ))
		WRITE_OPCODE( pc, CR_FOGIV_OPCODE );
}
