/***************************************************************
**
** Broadcom Corp. Confidential
** Copyright 2002 Broadcom Corp. All Rights Reserved.
**
** THIS SOFTWARE MAY ONLY BE USED SUBJECT TO AN EXECUTED 
** SOFTWARE LICENSE AGREEMENT BETWEEN THE USER AND BROADCOM. 
** YOU HAVE NO RIGHT TO USE OR EXPLOIT THIS MATERIAL EXCEPT 
** SUBJECT TO THE TERMS OF SUCH AN AGREEMENT.
**
** Description: sgil platform definitions
**
** Created: 8/22/2002 by Jeffrey P. Fisher
**
**
**
****************************************************************/

/** include files **/
#include "bgfx_defs.h"

/** local types, definitions and data **/
static int g_bgfx_debug_level = 1;
static bgfx_io_t *g_p_io = NULL;
static bgfx_prot_t *g_prot_t = NULL;
static bgfx_hw_t *g_hw_t = NULL;
/****************************************************************}
* INPUTS:	none
* OUTPUTS:	none
* RETURNS:	debug level 
* FUNCTION: get the debug level
*
****************************************************************/

int bgfx_get_debug_level()
{
	return g_bgfx_debug_level;
}
/****************************************************************}
* INPUTS:	debug level
* OUTPUTS:	none
* RETURNS:	none 
* FUNCTION: set the debug level
*
****************************************************************/
void bgfx_set_debug_level(int level)
{
	g_bgfx_debug_level = level;
}


/****************************************************************
* INPUTS:	none
* OUTPUTS:	none
* RETURNS:	none 
* FUNCTION:	Called to protect internal global structures.  Supplied
*			callback function should function as a mutual exclusion
*			semaphore.
****************************************************************/
void bgfx_lock(void)
{
	if (g_prot_t)
	{
		g_prot_t->lock();   
	}
}
/****************************************************************
* INPUTS:	none
* OUTPUTS:	none
* RETURNS:	none 
* FUNCTION:	Called to release protection of internal global structures.
*			Supplied callback function should release mutual exclusion
*			semaphore.
****************************************************************/
void bgfx_unlock(void)
{
	if (g_prot_t)
	{
		g_prot_t->unlock();
	}
}

/****************************************************************
* INPUTS:	same as standard file IO (see fread)
* OUTPUTS:	none
* RETURNS:	none 
* FUNCTION:	Read data from the file stream.  Supplied callback function
*			should load count elements of size bytes into the supplied
*			buffer and return the number of bytes actualy loaded or
*			value < 0 when an error occurs.
*
*
****************************************************************/
long bgfx_read(void *buffer, long size, long count, void *fp )
{
	if (!g_p_io || !g_p_io->read)
		return -1;

	return g_p_io->read(buffer,size,count,fp);   
}

/****************************************************************
* INPUTS:	same as standard file IO (see fread)
* OUTPUTS:	none
* RETURNS:	none 
* FUNCTION:	Read data from the file stream.  Supplied callback function
*			should load count elements of size bytes into the supplied
*			buffer and return the number of bytes actualy loaded or
*			value < 0 when an error occurs.
*
*
****************************************************************/
unsigned int bgfx_tell(void *fp )
{
	if (!g_p_io || !g_p_io->tell)
		return -1;
	return g_p_io->tell(fp);   
}

/****************************************************************
* INPUTS:	same as standard file IO (see fseek)
* OUTPUTS:	none
* RETURNS:	none 
* FUNCTION:	Set the current file pointer. (only uses SEEK_SET = 0)
*
*
****************************************************************/
int bgfx_set( void *fp,int offset, int whence)
{
	if (!g_p_io || !g_p_io->set)
		return -1;
	return g_p_io->set(fp, offset, whence);   
}

/****************************************************************}
* INPUTS:	io and protection function structures
* OUTPUTS:	none
* RETURNS:	non-zero on failure 
* FUNCTION: initialize sgl, primarily for protection of freetype global
*			structures.
*
****************************************************************/
void bgfx_config(bgfx_io_t *io_p,bgfx_prot_t *prot_p,bgfx_hw_t *hw_p)
{
	g_p_io = io_p;
	g_prot_t = prot_p;
	g_hw_t = hw_p;
}
/****************************************************************}
* INPUTS:	ptr - address to flush
*			nbytes - number of bytes
* OUTPUTS:	none
* RETURNS:	none 
* FUNCTION: Perform a cache flush for the address and size specified.
*
****************************************************************/
void bgfx_cacheflush(void *ptr,int nbytes)
{
	/* not implemented in uclibc cacheflush(ptr,nbytes,DCACHE);
	BROKEN syscall(__NR_cacheflush,ptr,nbytes,DCACHE);
	*/
}
int bgfx_hw_fill( void *surf, bgfx_rect *r, uint32_t pixel )
{
	if (!g_hw_t || !g_hw_t->fill_cb)
	{
		return -1;
	}
	return g_hw_t->fill_cb(surf,r,pixel);
}
int bgfx_hw_blit( void *src_surf, bgfx_rect *src_r, 
							 void *dst_surf, bgfx_rect *dst_r,
							 void *out_surf, bgfx_rect *out_r )
{
	if (!g_hw_t || !g_hw_t->blit_cb)
	{
		return -1;
	}
	return g_hw_t->blit_cb(src_surf,src_r,dst_surf,dst_r,out_surf,out_r);
}

int bgfx_hw_surf_create(uint32_t width, 
								uint32_t height, 
								int format, 
								uint8_t **mem, 
								uint32_t *pitch, 
								void **p_settop_surf )
{
	if (!g_hw_t || !g_hw_t->create_cb)
	{
		return -1;
	}
	return g_hw_t->create_cb(width, height, format, mem, pitch, p_settop_surf);
}

void bgfx_hw_surf_destroy(void *p_settop_surf )
{
	if (!g_hw_t || !g_hw_t->destroy_cb)
	{
		return;
	}
	g_hw_t->destroy_cb(p_settop_surf);
}
bgfx_hw_t *bgfx_hw_get_fcn()
{
	return g_hw_t;
}