/*______________________________________________________________________________________ | | | waveforms image | | Copyright (c) 2000 stranded UFO productions | | Written by Paul Juhasz | |______________________________________________________________________________________*/ #include "waveforms.h" #include "waveforms_protos.h" #undef SysBase #undef GfxBase #undef IntuitionBase #undef UtilityBase #define SysBase cb->cb_SysBase #define GfxBase cb->cb_GfxBase #define IntuitionBase cb->cb_IntuitionBase #define UtilityBase cb->cb_UtilityBase #ifdef DOUBLEMATH #define MathIeeeDoubBasBase cb->cb_MathIeeeDoubBasBase #define MathIeeeDoubTransBase cb->cb_MathIeeeDoubTransBase #endif /* DOUBLEMATH */ /*______________________________________________________________________________________ | | | Inquire for attribute tag values of the waveform.image | |______________________________________________________________________________________*/ STATIC ULONG getAttrsMethod( Class *cl, struct Image *im, struct opGet *msg ) { struct waveformData *wfd = INST_DATA( cl, im ); switch ( msg->opg_AttrID ) { case WFI_WaveType: *msg->opg_Storage = (ULONG)wfd->wf_WaveType; break; case WFI_WaveShape: *msg->opg_Storage = (ULONG)wfd->wf_WaveShape; break; case WFI_Outline: *msg->opg_Storage = (ULONG)wfd->wf_Outline; break; case WFI_OsciPen: *msg->opg_Storage = (ULONG)wfd->wf_OsciPen; break; case WFI_ZeroPen: *msg->opg_Storage = (ULONG)wfd->wf_ZeroPen; break; /* Let the superclass try */ default: return((ULONG)DoSuperMethodA( cl, (Object *)im, (Msg)msg )); } return( 1UL ); } /*______________________________________________________________________________________ | | | Update the waveform.image from tag values and prepare it | |______________________________________________________________________________________*/ STATIC LONG setAttrsMethod( Class *cl, struct Image *im, struct opSet *msg, BOOL init ) { struct WFIBase *cb = (struct WFIBase *)cl->cl_Dispatcher.h_Data; struct waveformData *wfd = INST_DATA( cl, im ); struct TagItem *tags = msg->ops_AttrList, *tstate, *tag; ULONG tidata; LONG refresh = 0L; /* Initialize the variables */ tstate = tags; if ( init ) im->Width = im->Height = 64; else refresh = DoSuperMethodA( cl, (Object *)im, (Msg)msg ); while ( tag = NextTagItem( &tstate )) { tidata = tag->ti_Data; switch ( tag->ti_Tag ) { case SYSIA_DrawInfo: wfd->wf_DrawInfo = (struct DrawInfo *)tidata; break; case IA_BGPen: wfd->wf_ShadowPen = (WORD)tidata; refresh = 1; break; case IA_FGPen: wfd->wf_HiLitePen = (WORD)tidata; refresh = 1; break; case IA_Width: im->Width = (WORD)tidata; refresh = 1; break; case IA_Height: im->Height = (WORD)tidata; refresh = 1; break; case WFI_OsciPen: wfd->wf_OsciPen = (WORD)tidata; refresh = 1; break; case WFI_WavePen: wfd->wf_WavePen = (WORD)tidata; refresh = 1; break; case WFI_ZeroPen: wfd->wf_ZeroPen = (WORD)tidata; refresh = 1; break; case WFI_WaveShape: wfd->wf_WaveShape = tidata; refresh = 1; break; case WFI_WaveType: wfd->wf_WaveType = tidata; refresh = 1; break; case WFI_Outline: wfd->wf_Outline = tidata; refresh = 1; break; case WFI_BoxFrame: wfd->wf_BoxFrame = tidata; refresh = 1; break; default: break; } } /* Make sure we have valid pens and other sanity checks... */ if ( wfd->wf_DrawInfo ) { if ( wfd->wf_ShadowPen == -1 ) wfd->wf_ShadowPen = wfd->wf_DrawInfo->dri_Pens[BLOCKPEN]; if ( wfd->wf_HiLitePen == -1 ) wfd->wf_HiLitePen = wfd->wf_DrawInfo->dri_Pens[DETAILPEN]; if ( wfd->wf_OsciPen == -1 ) wfd->wf_OsciPen = wfd->wf_DrawInfo->dri_Pens[BARBLOCKPEN]; if ( wfd->wf_WavePen == -1 ) wfd->wf_WavePen = wfd->wf_DrawInfo->dri_Pens[BARDETAILPEN]; } if ( wfd->wf_ZeroPen == -1 ) wfd->wf_ZeroPen = wfd->wf_DrawInfo->dri_Pens[BARTRIMPEN]; //(LONG)wfd->wf_OsciPen; if (( wfd->wf_WaveType > WF_SQUARE_WAVE ) || ( wfd->wf_WaveType < WF_SINE_WAVE )) wfd->wf_WaveType = WF_SINE_WAVE; if (( wfd->wf_WaveShape > 98L ) || ( wfd->wf_WaveShape < -98L )) wfd->wf_WaveShape = 0L; if (( wfd->wf_Outline != WF_SOLID_DISPLAY ) && ( wfd->wf_Outline != WF_DOTTED_DISPLAY )) wfd->wf_Outline = WF_DOTTED_DISPLAY; return( refresh ); } /*__________________________________________________________________________________________ | | | Data for Sintable | | As using Floating Point Numbers would be Tooooo Slow for the Computer to | | attain a suitable frame rate the values are first all multiplied by 16384 | | which just happens to be 14 shifts left (very helpfull) which gets | | rid of the decimal Point and then when multiplied with X or Y are then | | Divided by 16384 (14 shifts right) | | Using this technique fast 3d graphics can be possible. | |__________________________________________________________________________________________*/ /*__________________________________________________________________________________________ | | | Draw the selected waveform.image into the window | |__________________________________________________________________________________________*/ STATIC LONG drawMethod( Class *cl, struct Image *im, struct impDraw *msg ) { struct WFIBase *cb = (struct WFIBase *)cl->cl_Dispatcher.h_Data; struct waveformData *wfd = INST_DATA( cl, im ); struct RastPort *rp = msg->imp_RPort; LONG wwid = im->Width - 1L, whgt = im->Height - 1L; LONG tx = msg->imp_Offset.X, ty = msg->imp_Offset.Y, ix, gwid, ghgt, ghlf, gmid, shape, samval, samdiv, halfw, quart, incr, fram = 1L, dfram, amplitude; #ifdef DOUBLEMATH double sinstep; #else LONG sinstep; const WORD sin_tab[] = { 0, 286, 572, 857, 1143, 1428, 1713, 1997, 2280, 2563, 2845, 3126, 3406, 3686, 3964, 4240, 4516, 4790, 5063, 5334, 5604, 5872, 6138, 6402, 6664, 6924, 7182, 7438, 7692, 7943, 8192, 8438, 8682, 8923, 9162, 9397, 9630, 9860, 10087, 10311, 10531, 10749, 10963, 11174, 11381, 11585, 11786, 11982, 12176, 12365, 12551, 12733, 12911, 13085, 13255, 13421, 13583, 13741, 13894, 14044, 14189, 14330, 14466, 14598, 14726, 14849, 14968, 15082, 15191, 15296, 15396, 15491, 15582, 15668, 15749, 15826, 15897, 15964, 16026, 16083, 16135, 16182, 16225, 16262, 16294, 16322, 16344, 16362, 16374, 16382, 16384, /* 90 */ 16382, 16374, 16362, 16344, 16322, 16294, 16262, 16225, 16182, 16135, 16083, 16026, 15964, 15897, 15826, 15749, 15668, 15582, 15491, 15396, 15296, 15191, 15082, 14967, 14849, 14726, 14598, 14466, 14330, 14189, 14044, 13894, 13741, 13583, 13421, 13255, 13085, 12911, 12733, 12551, 12365, 12176, 11982, 11786, 11585, 11381, 11174, 10963, 10749, 10531, 10311, 10087, 9860, 9630, 9397, 9162, 8923, 8682, 8438, 8192, 7943, 7692, 7438, 7182, 6924, 6664, 6402, 6138, 5872, 5604, 5334, 5063, 4790, 4516, 4240, 3964, 3686, 3406, 3126, 2845, 2563, 2280, 1997, 1713, 1428, 1143, 857, 572, 286, 0, /* 180 */ -286, -572, -857, -1143, -1428, -1713, -1997, -2280, -2563, -2845, -3126, -3406, -3686, -3964, -4240, -4516, -4790, -5063, -5334, -5604, -5872, -6138, -6402, -6664, -6924, -7182, -7438, -7692, -7943, -8192, -8438, -8682, -8923, -9162, -9397, -9630, -9860,-10087,-10311, -10531,-10749,-10963,-11174,-11381,-11585,-11786,-11982,-12176,-12365,-12551,-12733,-12911, -13085,-13255,-13421,-13583,-13741,-13894,-14044,-14189,-14330,-14466,-14598,-14726,-14849, -14968,-15082,-15191,-15296,-15396,-15491,-15582,-15668,-15749,-15826,-15897,-15964,-16026, -16083,-16135,-16182,-16225,-16262,-16294,-16322,-16344,-16362,-16374,-16382,-16384, /* 270 */ -16382,-16374,-16362,-16344,-16322,-16294,-16262,-16225,-16182,-16135,-16083,-16026,-15964, -15897,-15826,-15749,-15668,-15582,-15491,-15396,-15296,-15191,-15082,-14967,-14849,-14726, -14598,-14466,-14330,-14189,-14044,-13894,-13741,-13583,-13421,-13255,-13085,-12911,-12733, -12551,-12365,-12176,-11982,-11786,-11585,-11381,-11174,-10963,-10749,-10531,-10311,-10087, -9860, -9630, -9397, -9162, -8923, -8682, -8438, -8192, -7943, -7692, -7438, -7182, -6924, -6664, -6402, -6138, -5872, -5604, -5334, -5063, -4790, -4516, -4240, -3964, -3686, -3406, -3126, -2845, -2563, -2280, -1997, -1713, -1428, -1143, -857, -572, -286, 0, 0 }; #endif /* DOUBLEMATH */ /* Initialise the constants and variables that we need */ shape = wfd->wf_WaveShape; SetBPen( rp, wfd->wf_OsciPen ); SetAPen( rp, wfd->wf_OsciPen ); /* switching to 'oscilloscope' colour */ RectFill( rp, tx, ty, tx + wwid, ty + whgt ); /* for the background */ if ( wfd->wf_BoxFrame ) { SetAPen( rp, wfd->wf_ShadowPen ); /* switching to shadow outline */ Move( rp, tx, ty + whgt ); Draw( rp, tx, ty ); /* Draw half of the box */ Draw( rp, tx + wwid, ty ); SetAPen( rp, wfd->wf_HiLitePen ); /* switching to hilite outline */ Draw( rp, tx + wwid, ty + whgt ); Draw( rp, tx, ty + whgt ); /* draw other half of box */ fram = ( wwid >= 25L ) ? ( wwid / 12L ) : 2L; /* adjust waveform to fit inside frame */ } dfram = fram * 2L; /* adjust frame thickness and inside area */ tx += fram; ty += fram; gwid = wwid - dfram; ghgt = whgt - dfram; gmid = ( gwid / 2 ); ghlf = ( ghgt / 2 ); if ( wfd->wf_Outline == WF_DOTTED_DISPLAY ) { if ( wfd->wf_ZeroPen ) { SetAPen( rp, wfd->wf_ZeroPen ); /* Draw the zero line when needed */ Move( rp, tx, ty + ghlf ); Draw( rp, tx + gwid, ty + ghlf ); } } /* ...and all is ready now, so let's draw up the wave for display */ SetAPen( rp, wfd->wf_WavePen ); switch ( wfd->wf_WaveType ) { #ifdef DOUBLEMATH /* calculate sine wave using ieee library. */ /* ...... doesn't quite work yet */ case WF_SINE_WAVE: /* try: radiant = degrees * Pi / 180 */ sinstep = gwid / 360.0; for ( ix = 0; ix < gwid; ix++ ) { amplitude = IEEEDPSin( sinstep * ix ) * ghlf; if ( wfd->wf_Outline == WF_SOLID_DISPLAY ) { Move( rp, tx + ix, ty + ghlf ); Draw( rp, tx + ix, (LONG)(( ty + ghlf ) - amplitude )); } else WritePixel( rp, tx + ix, (LONG)(( ty + ghlf ) - amplitude )); } break; #else /* use the above pre-calculated sine-table. */ case WF_SINE_WAVE: ix = 0L; sinstep = 0; while ( ix < gwid ) { amplitude = (( sin_tab[( sinstep / 100 )] * ghlf ) >> 14 ); sinstep += ( 36000 / gwid ); if ( wfd->wf_Outline == WF_SOLID_DISPLAY ) { Move( rp, tx + ix, ty + ghlf ); Draw( rp, tx + ix, ((ty + ghlf ) - amplitude )); } else WritePixel( rp, tx + ix, (( ty + ghlf ) - amplitude )); ix++; } break; #endif /* DOUBLEMATH */ case WF_TRIANGULAR_WAVE: quart = gmid >> 1; samval = 0; incr = ( ghlf * 1000 ) / quart; for ( ix = 0; ix <= quart; ix++ ) { samdiv = samval / 1000; if ( wfd->wf_Outline == WF_SOLID_DISPLAY ) { Move( rp, tx + ix, ty + ghlf ); Draw( rp, tx + ix, ty + ghlf - samdiv ); /* first quarter */ Move( rp, tx + ( gmid - ix ), ty + ghlf ); Draw( rp, tx + ( gmid - ix ), ty + ghlf - samdiv ); /* second quarter */ Move( rp, tx + gmid + ix, ty + ghlf ); Draw( rp, tx + gmid + ix, ty + ghlf + samdiv ); /* third quarter */ Move( rp, tx + gmid + gmid - ix, ty + ghlf ); Draw( rp, tx + gmid + gmid - ix, ty + ghlf + samdiv ); /* fourth quarter */ } else { WritePixel( rp, tx + ix, ( ty + ghlf - samdiv )); WritePixel( rp, tx + ( gmid - ix ), ( ty + ghlf - samdiv )); WritePixel( rp, tx + ( gmid + ix ), ( ty + ghlf + samdiv )); WritePixel( rp, tx + ( gwid - ix ), ( ty + ghlf + samdiv )); } samval += incr; } break; case WF_RAMPUP_WAVE: samval = ( ghlf * 1000 ); incr = -(( ghlf * 1000 ) / gmid ); if ( wfd->wf_Outline == WF_DOTTED_DISPLAY ) { /* first vertical */ Move( rp, tx, ty + ghlf ); Draw( rp, tx, ty + ghlf + ghlf ); } for ( ix = 1; ix < gwid; ix++ ) { if ( wfd->wf_Outline == WF_SOLID_DISPLAY ) { Move( rp, tx + ix, ty + ghlf ); Draw( rp, tx + ix, ty + ghlf + samval / 1000 ); } else WritePixel( rp, tx + ix, ( ty + ghlf + samval / 1000 )); samval += incr; } if ( wfd->wf_Outline == WF_DOTTED_DISPLAY ) { Move( rp, tx + ix, ty ); Draw( rp, tx + ix, ty + ghlf ); /* last vertical */ } break; case WF_RAMPDOWN_WAVE: samval = -( ghlf * 1000 ); incr = (( ghlf * 1000 ) / gmid ); if ( wfd->wf_Outline == WF_DOTTED_DISPLAY ) { /* first vertical */ Move( rp, tx, ty ); Draw( rp, tx, ty + ghlf ); } for ( ix = 1; ix < gwid; ix++ ) { if ( wfd->wf_Outline == WF_SOLID_DISPLAY ) { Move( rp, tx + ix, ty + ghlf ); Draw( rp, tx + ix, ty + ghlf + samval / 1000 ); } else WritePixel( rp, tx + ix, ( ty + ghlf + samval / 1000 )); samval += incr; } if ( wfd->wf_Outline == WF_DOTTED_DISPLAY ) { Move( rp, tx + ix, ty + ghlf ); Draw( rp, tx + ix, ty + ghlf + samval / 1000 ); /* last vertical */ } break; case WF_SQUARE_WAVE: halfw = gmid; halfw += (( gmid * shape ) / 100 ); if ( halfw <= 1 ) halfw += 1; if ( halfw >= ( gwid - 1 )) halfw -= 1; if ( wfd->wf_Outline == WF_DOTTED_DISPLAY ) { /* first vertical */ Move( rp, tx, ty + ghlf ); Draw( rp, tx, ty + 1 ); } for ( ix = 1; ix < halfw; ix++ ) { if ( wfd->wf_Outline == WF_SOLID_DISPLAY ) { Move( rp, tx + ix, ty + ghlf ); Draw( rp, tx + ix, ty + 1 ); } else WritePixel( rp, tx + ix, ( ty + 1 )); } if ( wfd->wf_Outline == WF_DOTTED_DISPLAY ) { /* middle vertical */ Move( rp, tx + ix, ty + 1 ); Draw( rp, tx + ix, ty + ghgt - 1 ); } for ( ix = halfw; ix < gwid; ix++ ) { if ( wfd->wf_Outline == WF_SOLID_DISPLAY ) { Move( rp, tx + ix, ty + ghlf ); Draw( rp, tx + ix, ty + ghgt - 1 ); } else WritePixel( rp, tx + ix, ( ty + ghgt - 1 )); } if ( wfd->wf_Outline == WF_DOTTED_DISPLAY ) { /* last vertical */ Move( rp, tx + ix, ty + ghlf ); Draw( rp, tx + ix, ty + ghgt - 1 ); } break; default: break; } tx -= fram; ty -= fram; /* reset frame coordinates */ SetAPen( rp, TEXTPEN ); return( 0 ); } /*______________________________________________________________________________________ | | | Create a new waveform.image | |______________________________________________________________________________________*/ STATIC LONG newMethod( Class *cl, struct Image *im, struct opSet *msg ) { struct Image *newobj; /* Create the new object */ if ( newobj = (struct Image *)DoSuperMethodA( cl, (Object *)im, (Msg)msg )) setAttrsMethod( cl, newobj, msg, TRUE ); /* Update the attributes */ return((LONG)newobj ); } /*______________________________________________________________________________________ | | | The waveform.image class dispatcher | |______________________________________________________________________________________*/ LONG __asm dispatchWFI( REGISTER __a0 Class *cl, REGISTER __a2 struct Image *im, REGISTER __a1 ULONG *msg ) { LONG retval; if ( cl->cl_UserData ) putreg( REG_A4, (LONG)cl->cl_UserData ); switch ( *msg ) { case OM_NEW: retval = newMethod( cl, im, (struct opSet *)msg ); break; case OM_SET: case OM_UPDATE: retval = setAttrsMethod( cl, im, (struct opSet *)msg, FALSE ); break; case OM_GET: retval = getAttrsMethod( cl, im, (struct opGet *)msg ); break; case IM_DRAW: retval = drawMethod( cl, im, (struct impDraw *)msg ); break; case OM_DISPOSE: retval = (LONG)DoSuperMethodA( cl, (Object *)im, ( Msg )msg ); break; default: retval = (LONG)DoSuperMethodA( cl, (Object *)im, ( Msg )msg ); break; } return( retval ); }