SBSPSS/source/frontend/scrollbg.cpp

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/*=========================================================================
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scrollbg.cpp
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Author: PKG
Created:
Project: Spongebob
Purpose:
Copyright (c) 2000 Climax Development Ltd
===========================================================================*/
/*----------------------------------------------------------------------
Includes
-------- */
#include "frontend\scrollbg.h"
//#ifndef __UTILS_HEADER__
//#include "utils\utils.h"
//#endif
#ifndef __GFX_SPRBANK_H__
#include "gfx\sprbank.h"
#endif
/* Std Lib
------- */
/* Data
---- */
#ifndef __SPR_FRONTEND_H__
#include <frontend.h>
#endif
/*----------------------------------------------------------------------
Tyepdefs && Defines
------------------- */
/*----------------------------------------------------------------------
Structure defintions
-------------------- */
/*----------------------------------------------------------------------
Function Prototypes
------------------- */
/*----------------------------------------------------------------------
Vars
---- */
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CScrollyBackground::init()
{
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m_sprites=new ("Scrolly Background sprites") SpriteBank;
m_sprites->load(FRONTEND_FRONTEND_SPR);
m_xOff=m_yOff=0;
setSpeed(DEFAULT_X_SPEED,DEFAULT_Y_SPEED);
setSpeedScale(DEFAULT_SPEED_SCALE);
setOt(DEFAULT_OT);
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setFrame(FRM__BG1);
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}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CScrollyBackground::shutdown()
{
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m_sprites->dump(); delete m_sprites; m_sprites=NULL;
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}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CScrollyBackground::render()
{
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POLY_FT4 *ft4;
sFrameHdr *fh;
int x,y,w,h;
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fh=m_sprites->getFrameHeader(m_frame);
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w=fh->W;
h=fh->H;
y=(m_yOff>>m_speedScale)-h;
do
{
x=(m_xOff>>m_speedScale)-w;
do
{
ft4=m_sprites->printFT4(fh,x,y,0,0,m_ot);
setSemiTrans(ft4,true);
x+=w;
}
while(x<512);
y+=h;
}
while(y<256);
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}
/*----------------------------------------------------------------------
Function:
Purpose:
Params:
Returns:
---------------------------------------------------------------------- */
void CScrollyBackground::think(int _frames)
{
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sFrameHdr *fh;
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fh=m_sprites->getFrameHeader(m_frame);
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m_xOff=(m_xOff+(_frames*m_xSpeed))%(fh->W<<m_speedScale);
m_yOff=(m_yOff+(_frames*m_ySpeed))%(fh->H<<m_speedScale);
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}
/*===========================================================================
end */