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desmume
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some cleaning so that it can be understood easier

This commit is contained in:
damdoum 2007-01-07 18:59:59 +00:00
parent 6c383a2ce2
commit d1a207c73f
1 changed files with 77 additions and 107 deletions
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184
desmume/src/GPU.c
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@ -775,6 +775,7 @@ INLINE void renderline_textBG(GPU * gpu, u8 num, u8 * DST, u16 X, u16 Y, u16 LG)
}
}
}
#undef RENDERL
}
INLINE void rotBG2(GPU * gpu, u8 num, u8 * DST, u16 H, s32 X, s32 Y, s16 PA, s16 PB, s16 PC, s16 PD, u16 LG)
@ -832,115 +833,84 @@ INLINE void rotBG2(GPU * gpu, u8 num, u8 * DST, u16 H, s32 X, s32 Y, s16 PA, s16
INLINE void extRotBG2(GPU * gpu, u8 num, u8 * DST, u16 H, s32 X, s32 Y, s16 PA, s16 PB, s16 PC, s16 PD, s16 LG)
{
u32 bgprop = gpu->BGProp[num];
u32 bgprop = gpu->BGProp[num];
s32 x = X + (s32)PB*(s32)H;
s32 y = Y + (s32)PD*(s32)H;
s32 dx = PA;
s32 dy = PC;
s32 auxX;
s32 auxY;
s16 lg = gpu->BGSize[num][0];
s16 ht = gpu->BGSize[num][1];
u16 lgmap = (lg>>3);
u8 * tile = (u8 *)gpu->BG_tile_ram[num];
u8 * dst = DST;
u16 mapinfo;
u8 coul;
switch(((bgprop>>2)&1)|((bgprop>>6)&2))
{
case 0 :
case 1 :
{
u8 * pal = ARM9Mem.ExtPal[gpu->core][gpu->BGExtPalSlot[num]];
if(!pal) return;
s32 x = X + (s32)PB*(s32)H;
s32 y = Y + (s32)PD*(s32)H;
#define LOOP(c) \
u16 i; \
for(i = 0; i < LG; ++i) { \
auxX = x>>8; auxY = y>>8; \
if(bgprop&(1<<13)) { \
auxX &= (lg-1); auxY &= (ht-1); \
} \
if ((auxX >= 0) && (auxX < lg) && (auxY >= 0) && (auxY < ht)) c \
dst += 2; x += dx; y += dy; \
}
u8 * map = gpu->BG_map_ram[num];
LOOP(
{
u16 x1;
u16 y1;
mapinfo = T1ReadWord(map, ((auxX>>3) + (auxY>>3) * lgmap) << 1);
s32 dx = PA;
s32 dy = PC;
s32 auxX;
s32 auxY;
s16 lg = gpu->BGSize[num][0];
s16 ht = gpu->BGSize[num][1];
u16 lgmap = (lg>>3);
u8 * tile = (u8 *)gpu->BG_tile_ram[num];
u8 * dst = DST;
u16 mapinfo;
u8 coul;
switch(((bgprop>>2)&1)|((bgprop>>6)&2))
{
case 0 :
case 1 :
{
u8 * map = gpu->BG_map_ram[num];
u8 * pal = ARM9Mem.ExtPal[gpu->core][gpu->BGExtPalSlot[num]];
u16 i;
if(!pal) return;
for(i = 0; i < LG; ++i)
{
auxX = x>>8;
auxY = y>>8;
if(bgprop&(1<<13))
{
auxX &= (lg-1);
auxY &= (ht-1);
}
if ((auxX >= 0) && (auxX < lg) && (auxY >= 0) && (auxY < ht))
{
u16 x1;
u16 y1;
mapinfo = T1ReadWord(map, ((auxX>>3) + (auxY>>3) * lgmap) << 1);
x1 = (mapinfo & 0x400) ? 7 - (auxX&7) : (auxX&7);
y1 = (mapinfo & 0x800) ? 7 - (auxY&7) : (auxY&7);
coul = tile[(mapinfo&0x3FF)*64 + x1 + (y1<<3)];
if(coul)
renderline_setFinalColor(gpu,0,num,dst, T1ReadWord(pal, (coul + (mapinfo>>12)*0x100) << 1));
}
dst += 2;
x += dx;
y += dy;
}
}
return;
case 2 :
{
u8 * map = gpu->BG_bmp_ram[num];
u8 * pal = ARM9Mem.ARM9_VMEM + gpu->core * 0x400;
u16 i;
for(i = 0; i < LG; ++i)
{
auxX = x>>8;
auxY = y>>8;
if(bgprop&(1<<13))
{
auxX &= (lg-1);
auxY &= (ht-1);
}
if ((auxX >= 0) && (auxX < lg) && (auxY >= 0) && (auxY < ht))
{
mapinfo = map[auxX + auxY * lg];
if(mapinfo)
renderline_setFinalColor(gpu,0,num,dst, T1ReadWord(pal, mapinfo << 1));
}
dst += 2;
x += dx;
y += dy;
}
}
return;
case 3 :
{
u8 * map = gpu->BG_bmp_ram[num];
u16 i;
for(i = 0; i < LG; ++i)
{
auxX = x>>8;
auxY = y>>8;
if(bgprop&(1<<13))
{
auxX &= (lg-1);
auxY &= (ht-1);
}
if ((auxX >= 0) && (auxX < lg) && (auxY >= 0) && (auxY < ht))
{
mapinfo = T1ReadWord(map, (auxX + auxY * lg) << 1);
if(mapinfo)
renderline_setFinalColor(gpu,0,num,dst, mapinfo);
}
dst += 2;
x += dx;
y += dy;
}
}
return;
x1 = (mapinfo & 0x400) ? 7 - (auxX&7) : (auxX&7);
y1 = (mapinfo & 0x800) ? 7 - (auxY&7) : (auxY&7);
coul = tile[(mapinfo&0x3FF)*64 + x1 + (y1<<3)];
if(coul)
renderline_setFinalColor(gpu,0,num,dst, T1ReadWord(pal, (coul + (mapinfo>>12)*0x100) << 1));
})
}
return;
case 2 :
{
u8 * pal = ARM9Mem.ARM9_VMEM + gpu->core * 0x400;
u8 * map = gpu->BG_bmp_ram[num];
LOOP(
{
mapinfo = map[auxX + auxY * lg];
if(mapinfo)
renderline_setFinalColor(gpu,0,num,dst, T1ReadWord(pal, mapinfo << 1));
})
}
return;
case 3 :
{
u8 * map = gpu->BG_bmp_ram[num];
LOOP(
{
mapinfo = T1ReadWord(map, (auxX + auxY * lg) << 1);
if(mapinfo)
renderline_setFinalColor(gpu,0,num,dst, mapinfo);
})
}
return;
#undef LOOP
}
}