vbagx/source/vba/Mode1.cpp

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2008-09-14 22:40:26 +02:00
// VisualBoyAdvance - Nintendo Gameboy/GameboyAdvance (TM) emulator.
// Copyright (C) 1999-2003 Forgotten
// Copyright (C) 2004 Forgotten and the VBA development team
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or(at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include "GBA.h"
#include "Globals.h"
#include "Gfx.h"
void mode1RenderLine()
{
u16 *palette = (u16 *)paletteRAM;
if(DISPCNT & 0x80)
{
for(int x = 0; x < 240; x++)
{
lineMix[x] = 0x7fff;
}
gfxLastVCOUNT = VCOUNT;
return;
}
if(layerEnable & 0x0100)
{
gfxDrawTextScreen(BG0CNT, BG0HOFS, BG0VOFS, line0);
}
if(layerEnable & 0x0200)
{
gfxDrawTextScreen(BG1CNT, BG1HOFS, BG1VOFS, line1);
}
if(layerEnable & 0x0400)
{
int changed = gfxBG2Changed;
if(gfxLastVCOUNT > VCOUNT)
changed = 3;
gfxDrawRotScreen(BG2CNT, BG2X_L, BG2X_H, BG2Y_L, BG2Y_H,
BG2PA, BG2PB, BG2PC, BG2PD,
gfxBG2X, gfxBG2Y, changed, line2);
}
gfxDrawSprites(lineOBJ);
u32 backdrop = (READ16LE(&palette[0]) | 0x30000000);
for(int x = 0; x < 240; x++)
{
u32 color = backdrop;
u8 top = 0x20;
if(line0[x] < color)
{
color = line0[x];
top = 0x01;
}
if((u8)(line1[x]>>24) < (u8)(color >> 24))
{
color = line1[x];
top = 0x02;
}
if((u8)(line2[x]>>24) < (u8)(color >> 24))
{
color = line2[x];
top = 0x04;
}
if((u8)(lineOBJ[x]>>24) < (u8)(color >> 24))
{
color = lineOBJ[x];
top = 0x10;
}
if((top & 0x10) && (color & 0x00010000))
{
// semi-transparent OBJ
u32 back = backdrop;
u8 top2 = 0x20;
if((u8)(line0[x]>>24) < (u8)(back >> 24))
{
back = line0[x];
top2 = 0x01;
}
if((u8)(line1[x]>>24) < (u8)(back >> 24))
{
back = line1[x];
top2 = 0x02;
}
if((u8)(line2[x]>>24) < (u8)(back >> 24))
{
back = line2[x];
top2 = 0x04;
}
if(top2 & (BLDMOD>>8))
color = gfxAlphaBlend(color, back,
coeff[COLEV & 0x1F],
coeff[(COLEV >> 8) & 0x1F]);
else
{
switch((BLDMOD >> 6) & 3)
{
case 2:
if(BLDMOD & top)
color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
break;
case 3:
if(BLDMOD & top)
color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
break;
}
}
}
lineMix[x] = color;
}
gfxBG2Changed = 0;
gfxLastVCOUNT = VCOUNT;
}
void mode1RenderLineNoWindow()
{
u16 *palette = (u16 *)paletteRAM;
if(DISPCNT & 0x80)
{
for(int x = 0; x < 240; x++)
{
lineMix[x] = 0x7fff;
}
gfxLastVCOUNT = VCOUNT;
return;
}
if(layerEnable & 0x0100)
{
gfxDrawTextScreen(BG0CNT, BG0HOFS, BG0VOFS, line0);
}
if(layerEnable & 0x0200)
{
gfxDrawTextScreen(BG1CNT, BG1HOFS, BG1VOFS, line1);
}
if(layerEnable & 0x0400)
{
int changed = gfxBG2Changed;
if(gfxLastVCOUNT > VCOUNT)
changed = 3;
gfxDrawRotScreen(BG2CNT, BG2X_L, BG2X_H, BG2Y_L, BG2Y_H,
BG2PA, BG2PB, BG2PC, BG2PD,
gfxBG2X, gfxBG2Y, changed, line2);
}
gfxDrawSprites(lineOBJ);
u32 backdrop = (READ16LE(&palette[0]) | 0x30000000);
for(int x = 0; x < 240; x++)
{
u32 color = backdrop;
u8 top = 0x20;
if(line0[x] < color)
{
color = line0[x];
top = 0x01;
}
if((u8)(line1[x]>>24) < (u8)(color >> 24))
{
color = line1[x];
top = 0x02;
}
if((u8)(line2[x]>>24) < (u8)(color >> 24))
{
color = line2[x];
top = 0x04;
}
if((u8)(lineOBJ[x]>>24) < (u8)(color >> 24))
{
color = lineOBJ[x];
top = 0x10;
}
if(!(color & 0x00010000))
{
switch((BLDMOD >> 6) & 3)
{
case 0:
break;
case 1:
{
if(top & BLDMOD)
{
u32 back = backdrop;
u8 top2 = 0x20;
if((u8)(line0[x]>>24) < (u8)(back >> 24))
{
if(top != 0x01)
{
back = line0[x];
top2 = 0x01;
}
}
if((u8)(line1[x]>>24) < (u8)(back >> 24))
{
if(top != 0x02)
{
back = line1[x];
top2 = 0x02;
}
}
if((u8)(line2[x]>>24) < (u8)(back >> 24))
{
if(top != 0x04)
{
back = line2[x];
top2 = 0x04;
}
}
if((u8)(lineOBJ[x]>>24) < (u8)(back >> 24))
{
if(top != 0x10)
{
back = lineOBJ[x];
top2 = 0x10;
}
}
if(top2 & (BLDMOD>>8))
color = gfxAlphaBlend(color, back,
coeff[COLEV & 0x1F],
coeff[(COLEV >> 8) & 0x1F]);
}
}
break;
case 2:
if(BLDMOD & top)
color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
break;
case 3:
if(BLDMOD & top)
color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
break;
}
}
else
{
// semi-transparent OBJ
u32 back = backdrop;
u8 top2 = 0x20;
if((u8)(line0[x]>>24) < (u8)(back >> 24))
{
back = line0[x];
top2 = 0x01;
}
if((u8)(line1[x]>>24) < (u8)(back >> 24))
{
back = line1[x];
top2 = 0x02;
}
if((u8)(line2[x]>>24) < (u8)(back >> 24))
{
back = line2[x];
top2 = 0x04;
}
if(top2 & (BLDMOD>>8))
color = gfxAlphaBlend(color, back,
coeff[COLEV & 0x1F],
coeff[(COLEV >> 8) & 0x1F]);
else
{
switch((BLDMOD >> 6) & 3)
{
case 2:
if(BLDMOD & top)
color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
break;
case 3:
if(BLDMOD & top)
color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
break;
}
}
}
lineMix[x] = color;
}
gfxBG2Changed = 0;
gfxLastVCOUNT = VCOUNT;
}
void mode1RenderLineAll()
{
u16 *palette = (u16 *)paletteRAM;
if(DISPCNT & 0x80)
{
for(int x = 0; x < 240; x++)
{
lineMix[x] = 0x7fff;
}
gfxLastVCOUNT = VCOUNT;
return;
}
bool inWindow0 = false;
bool inWindow1 = false;
if(layerEnable & 0x2000)
{
u8 v0 = WIN0V >> 8;
u8 v1 = WIN0V & 255;
inWindow0 = ((v0 == v1) && (v0 >= 0xe8));
if(v1 >= v0)
inWindow0 |= (VCOUNT >= v0 && VCOUNT < v1);
else
inWindow0 |= (VCOUNT >= v0 || VCOUNT < v1);
}
if(layerEnable & 0x4000)
{
u8 v0 = WIN1V >> 8;
u8 v1 = WIN1V & 255;
inWindow1 = ((v0 == v1) && (v0 >= 0xe8));
if(v1 >= v0)
inWindow1 |= (VCOUNT >= v0 && VCOUNT < v1);
else
inWindow1 |= (VCOUNT >= v0 || VCOUNT < v1);
}
if(layerEnable & 0x0100)
{
gfxDrawTextScreen(BG0CNT, BG0HOFS, BG0VOFS, line0);
}
if(layerEnable & 0x0200)
{
gfxDrawTextScreen(BG1CNT, BG1HOFS, BG1VOFS, line1);
}
if(layerEnable & 0x0400)
{
int changed = gfxBG2Changed;
if(gfxLastVCOUNT > VCOUNT)
changed = 3;
gfxDrawRotScreen(BG2CNT, BG2X_L, BG2X_H, BG2Y_L, BG2Y_H,
BG2PA, BG2PB, BG2PC, BG2PD,
gfxBG2X, gfxBG2Y, changed, line2);
}
gfxDrawSprites(lineOBJ);
gfxDrawOBJWin(lineOBJWin);
u32 backdrop = (READ16LE(&palette[0]) | 0x30000000);
u8 inWin0Mask = WININ & 0xFF;
u8 inWin1Mask = WININ >> 8;
u8 outMask = WINOUT & 0xFF;
for(int x = 0; x < 240; x++)
{
u32 color = backdrop;
u8 top = 0x20;
u8 mask = outMask;
if(!(lineOBJWin[x] & 0x80000000))
{
mask = WINOUT >> 8;
}
if(inWindow1)
{
if(gfxInWin1[x])
mask = inWin1Mask;
}
if(inWindow0)
{
if(gfxInWin0[x])
{
mask = inWin0Mask;
}
}
if(line0[x] < color && (mask & 1))
{
color = line0[x];
top = 0x01;
}
if((u8)(line1[x]>>24) < (u8)(color >> 24) && (mask & 2))
{
color = line1[x];
top = 0x02;
}
if((u8)(line2[x]>>24) < (u8)(color >> 24) && (mask & 4))
{
color = line2[x];
top = 0x04;
}
if((u8)(lineOBJ[x]>>24) < (u8)(color >> 24) && (mask & 16))
{
color = lineOBJ[x];
top = 0x10;
}
// special FX on the window
if(mask & 32)
{
if(!(color & 0x00010000))
{
switch((BLDMOD >> 6) & 3)
{
case 0:
break;
case 1:
{
if(top & BLDMOD)
{
u32 back = backdrop;
u8 top2 = 0x20;
if((mask & 1) && (u8)(line0[x]>>24) < (u8)(back >> 24))
{
if(top != 0x01)
{
back = line0[x];
top2 = 0x01;
}
}
if((mask & 2) && (u8)(line1[x]>>24) < (u8)(back >> 24))
{
if(top != 0x02)
{
back = line1[x];
top2 = 0x02;
}
}
if((mask & 4) && (u8)(line2[x]>>24) < (u8)(back >> 24))
{
if(top != 0x04)
{
back = line2[x];
top2 = 0x04;
}
}
if((mask & 16) && (u8)(lineOBJ[x]>>24) < (u8)(back >> 24))
{
if(top != 0x10)
{
back = lineOBJ[x];
top2 = 0x10;
}
}
if(top2 & (BLDMOD>>8))
color = gfxAlphaBlend(color, back,
coeff[COLEV & 0x1F],
coeff[(COLEV >> 8) & 0x1F]);
}
}
break;
case 2:
if(BLDMOD & top)
color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
break;
case 3:
if(BLDMOD & top)
color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
break;
}
}
else
{
// semi-transparent OBJ
u32 back = backdrop;
u8 top2 = 0x20;
if((mask & 1) && (u8)(line0[x]>>24) < (u8)(back >> 24))
{
back = line0[x];
top2 = 0x01;
}
if((mask & 2) && (u8)(line1[x]>>24) < (u8)(back >> 24))
{
back = line1[x];
top2 = 0x02;
}
if((mask & 4) && (u8)(line2[x]>>24) < (u8)(back >> 24))
{
back = line2[x];
top2 = 0x04;
}
if(top2 & (BLDMOD>>8))
color = gfxAlphaBlend(color, back,
coeff[COLEV & 0x1F],
coeff[(COLEV >> 8) & 0x1F]);
else
{
switch((BLDMOD >> 6) & 3)
{
case 2:
if(BLDMOD & top)
color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
break;
case 3:
if(BLDMOD & top)
color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
break;
}
}
}
}
else if(color & 0x00010000)
{
// semi-transparent OBJ
u32 back = backdrop;
u8 top2 = 0x20;
if((mask & 1) && (u8)(line0[x]>>24) < (u8)(back >> 24))
{
back = line0[x];
top2 = 0x01;
}
if((mask & 2) && (u8)(line1[x]>>24) < (u8)(back >> 24))
{
back = line1[x];
top2 = 0x02;
}
if((mask & 4) && (u8)(line2[x]>>24) < (u8)(back >> 24))
{
back = line2[x];
top2 = 0x04;
}
if(top2 & (BLDMOD>>8))
color = gfxAlphaBlend(color, back,
coeff[COLEV & 0x1F],
coeff[(COLEV >> 8) & 0x1F]);
else
{
switch((BLDMOD >> 6) & 3)
{
case 2:
if(BLDMOD & top)
color = gfxIncreaseBrightness(color, coeff[COLY & 0x1F]);
break;
case 3:
if(BLDMOD & top)
color = gfxDecreaseBrightness(color, coeff[COLY & 0x1F]);
break;
}
}
}
lineMix[x] = color;
}
gfxBG2Changed = 0;
gfxLastVCOUNT = VCOUNT;
}