games/snes: mode 5/6; overscan fix
This commit is contained in:
aiju
parent
0753d7852d
commit
bfbe480319
2 changed files with 114 additions and 48 deletions
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@ -5,7 +5,7 @@
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#include "fns.h"
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int ppux, ppuy, rx;
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static u8int mode, bright, pixelpri[2];
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static u8int mode, bright, pixelpri[2], hires;
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static u32int pixelcol[2];
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u16int vtime = 0x1ff, htime = 0x1ff, subcolor;
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uchar pic[256*239*2*3];
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@ -38,13 +38,13 @@ darken(u16int v)
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}
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static void
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pixeldraw(int x, int y, u16int v)
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pixeldraw(int x, int y, u16int v, int s)
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{
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uchar *p;
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u16int *q;
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union { u16int w; u8int b[2]; } u;
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if(bright != 0xf)
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if(bright != 0xf && s >= 0)
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v = darken(v);
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if(scale == 1){
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p = pic + (x + y * 256) * 2;
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@ -56,7 +56,8 @@ pixeldraw(int x, int y, u16int v)
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u.b[1] = v >> 8;
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if(scale == 2){
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q = (u16int*)pic + (x + y * 256) * 2;
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q[0] = u.w;
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if(s < 1)
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q[0] = u.w;
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q[1] = u.w;
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}else{
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q = (u16int*)pic + (x + y * 256) * 3;
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@ -94,7 +95,7 @@ window(int n)
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}
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static void
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pixel(int n, int v, int pri)
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npixel(int n, int v, int pri)
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{
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int a;
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@ -109,6 +110,32 @@ pixel(int n, int v, int pri)
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}
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}
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static void
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spixel(int n, int v, int pri)
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{
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int a;
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a = 1<<n;
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if((reg[TS] & a) != 0 && pri > pixelpri[1] && ((reg[TSW] & a) == 0 || !window(n))){
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pixelcol[1] = v;
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pixelpri[1] = pri;
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}
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}
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static void
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mpixel(int n, int v, int pri)
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{
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int a;
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a = 1<<n;
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if((reg[TM] & a) != 0 && pri > pixelpri[0] && ((reg[TMW] & a) == 0 || !window(n))){
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pixelcol[0] = v;
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pixelpri[0] = pri;
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}
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}
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static void (*pixel)(int, int, int) = npixel;
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static u16int
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tile(int n, int tx, int ty)
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{
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@ -127,16 +154,18 @@ tile(int n, int tx, int ty)
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}
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static void
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chr(int n, int nb, int sz, u16int t, int x, int y, u32int c[])
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chr(int n, int nb, int w, int h, u16int t, int x, int y, u32int c[])
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{
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u16int a;
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if(sz == 16){
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if(w == 16)
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t += (x >> 3 ^ t >> 14) & 1;
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if(h == 16){
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if(y >= 8){
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t += ((x >> 3 ^ t >> 14) & 1) + ((~t >> 11) & 16);
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t += (~t >> 11) & 16;
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y -= 8;
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}else
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t += ((x >> 3 ^ t >> 14) & 1) + ((t >> 11) & 16);
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t += (t >> 11) & 16;
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}
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if((t & 0x8000) != 0)
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y = 7 - y;
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@ -235,7 +264,7 @@ bgpixel(u32int *c, int nb, int d)
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}
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static struct bgctxt {
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u8int sz, szsh, nb, pri[2];
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u8int w, h, wsh, hsh, nb, pri[2];
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u16int tx, ty, tnx, tny;
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u16int t;
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u32int c[2];
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@ -251,8 +280,10 @@ bginit(int n, int nb, int prilo, int prihi)
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int sx, sy;
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p = bgctxts + n;
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p->szsh = (reg[BGMODE] & (1<<(4+n))) != 0 ? 4 : 3;
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p->sz = 1<<p->szsh;
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p->hsh = ((reg[BGMODE] & (1<<(4+n))) != 0) ? 4 : 3;
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p->wsh = mode >= 5 ? 4 : p->hsh;
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p->h = 1<<p->hsh;
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p->w = 1<<p->wsh;
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p->nb = nb;
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p->pri[0] = prilo;
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p->pri[1] = prihi;
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@ -266,13 +297,15 @@ bginit(int n, int nb, int prilo, int prihi)
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}
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}else
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p->msz = 1;
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if(mode >= 5)
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sx <<= 1;
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redo:
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p->tx = sx >> p->szsh;
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p->tnx = sx & (p->sz - 1);
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p->ty = sy >> p->szsh;
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p->tny = sy & (p->sz - 1);
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p->tx = sx >> p->wsh;
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p->tnx = sx & (p->w - 1);
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p->ty = sy >> p->hsh;
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p->tny = sy & (p->h - 1);
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p->t = tile(n, p->tx, p->ty);
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chr(n, nb, p->sz, p->t, p->tnx, p->tny, p->c);
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chr(n, nb, p->w, p->h, p->t, p->tnx, p->tny, p->c);
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p->pal = palette(n, p->t >> 10 & 7);
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if((p->tnx & 7) != 0)
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shift(p->c, nb, p->tnx & 7, p->t & 0x4000);
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@ -305,14 +338,14 @@ bg(int n)
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}
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if(v != 0)
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pixel(n, p->pal + v, p->pri[(p->t & 0x2000) != 0]);
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if(++p->tnx == p->sz){
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if(++p->tnx == p->w){
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p->tx++;
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p->tnx = 0;
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p->t = tile(n, p->tx, p->ty);
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p->pal = palette(n, p->t >> 10 & 7);
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}
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if((p->tnx & 7) == 0)
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chr(n, p->nb, p->sz, p->t, p->tnx, p->tny, p->c);
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chr(n, p->nb, p->w, p->h, p->t, p->tnx, p->tny, p->c);
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}
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static void
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@ -321,10 +354,12 @@ optinit(void)
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struct bgctxt *p;
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p = bgctxts + 2;
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p->szsh = (reg[BGMODE] & (1<<6)) != 0 ? 4 : 3;
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p->sz = 1<<p->szsh;
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p->tnx = hofs[2] & (p->sz - 1);
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p->tx = hofs[2] >> p->szsh;
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p->hsh = (reg[BGMODE] & (1<<6)) != 0 ? 4 : 3;
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p->wsh = mode >= 5 ? 4 : p->hsh;
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p->w = 1<<p->wsh;
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p->h = 1<<p->hsh;
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p->tnx = hofs[2] & (p->w - 1);
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p->tx = hofs[2] >> p->wsh;
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bgctxts[0].otx = bgctxts[1].otx = 0xffff;
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bgctxts[0].oty = bgctxts[0].ty;
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bgctxts[0].otny = bgctxts[0].tny;
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@ -340,40 +375,40 @@ opt(void)
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int sx, sy;
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p = bgctxts + 2;
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if(++p->tnx == p->sz){
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if(++p->tnx == p->w){
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if(mode == 4){
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hval = tile(2, p->tx, vofs[2] >> p->szsh);
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hval = tile(2, p->tx, vofs[2] >> p->hsh);
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if((hval & 0x8000) != 0){
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vval = hval;
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hval = 0;
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}else
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vval = 0;
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}else{
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hval = tile(2, p->tx, vofs[2] >> p->szsh);
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vval = tile(2, p->tx, (vofs[2]+8) >> p->szsh);
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hval = tile(2, p->tx, vofs[2] >> p->hsh);
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vval = tile(2, p->tx, (vofs[2]+8) >> p->hsh);
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}
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sx = (rx & ~7) + (hval & 0x1ff8);
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sy = ppuy + (vval & 0x1fff);
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if((vval & 0x2000) != 0){
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bgctxts[0].oty = sy >> bgctxts[0].szsh;
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bgctxts[0].otny = sy & (bgctxts[0].sz - 1);
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bgctxts[0].oty = sy >> bgctxts[0].hsh;
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bgctxts[0].otny = sy & (bgctxts[0].h - 1);
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}else{
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bgctxts[0].oty = bgctxts[0].ty;
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bgctxts[0].otny = bgctxts[0].tny;
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}
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if((vval & 0x4000) != 0){
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bgctxts[1].oty = sy >> bgctxts[1].szsh;
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bgctxts[1].otny = sy & (bgctxts[1].sz - 1);
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bgctxts[1].oty = sy >> bgctxts[1].hsh;
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bgctxts[1].otny = sy & (bgctxts[1].h - 1);
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}else{
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bgctxts[1].oty = bgctxts[1].ty;
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bgctxts[1].otny = bgctxts[1].tny;
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}
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if((hval & 0x2000) != 0)
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bgctxts[0].otx = sx >> bgctxts[0].szsh;
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bgctxts[0].otx = sx >> bgctxts[0].wsh;
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else
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bgctxts[0].otx = 0xffff;
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if((hval & 0x4000) != 0)
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bgctxts[1].otx = sx >> bgctxts[1].szsh;
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bgctxts[1].otx = sx >> bgctxts[1].wsh;
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else
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bgctxts[1].otx = 0xffff;
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p->tnx = 0;
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@ -399,14 +434,14 @@ bgopt(int n)
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}
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if(v != 0)
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pixel(n, p->pal + v, p->pri[(p->t & 0x2000) != 0]);
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if(++p->tnx == p->sz){
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if(++p->tnx == p->w){
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p->tx++;
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p->tnx = 0;
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}
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if((p->tnx & 7) == 0){
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p->t = tile(n, p->otx == 0xffff ? p->tx : p->otx, p->oty);
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p->pal = palette(n, p->t >> 10 & 7);
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chr(n, p->nb, p->sz, p->t, p->tnx, p->otny, p->c);
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chr(n, p->nb, p->w, p->h, p->t, p->tnx, p->otny, p->c);
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}
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}
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@ -526,6 +561,7 @@ bgsinit(void)
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{
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static int bitch[8];
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pixel = npixel;
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switch(mode){
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case 0:
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bginit(0, 2, 0x80, 0xb0);
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@ -552,13 +588,21 @@ bgsinit(void)
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bginit(1, 2, 0x11, 0x71);
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optinit();
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break;
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case 5:
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bginit(0, 4, 0x40, 0xa0);
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bginit(1, 2, 0x11, 0x71);
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break;
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case 6:
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bginit(0, 4, 0x40, 0xa0);
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optinit();
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break;
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case 7:
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bg7init(0);
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if((reg[SETINI] & EXTBG) != 0)
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bg7init(1);
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break;
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default:
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bgctxts[0].sz = bgctxts[1].sz = 0;
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bgctxts[0].w = bgctxts[1].w = 0;
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if(bitch[mode]++ == 0)
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print("bg mode %d not implemented\n", mode);
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}
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@ -589,6 +633,23 @@ bgs(void)
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bg(0);
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bg(1);
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break;
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case 5:
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pixel = spixel;
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bg(0);
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bg(1);
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pixel = mpixel;
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bg(0);
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bg(1);
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pixel = npixel;
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break;
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case 6:
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opt();
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pixel = spixel;
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bgopt(0);
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pixel = mpixel;
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bgopt(0);
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pixel = npixel;
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break;
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case 7:
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bg7(0);
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if((reg[SETINI] & EXTBG) != 0)
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@ -759,7 +820,7 @@ nope:
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}
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static u16int
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colormath(void)
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colormath(int n)
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{
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u16int v, w, r, g, b;
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u8int m, m2, div;
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@ -775,12 +836,12 @@ colormath(void)
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case 3: v = 0; break;
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}
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if(v){
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if((pixelcol[0] & 0x10000) != 0)
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v = pixelcol[0];
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if((pixelcol[n] & 0x10000) != 0)
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v = pixelcol[n];
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else
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v = cgram[pixelcol[0] & 0xff];
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v = cgram[pixelcol[n] & 0xff];
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}
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if((m2 & (1 << (pixelpri[0] & 0xf))) == 0)
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if((m2 & (1 << (pixelpri[n] & 0xf))) == 0)
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return v;
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switch((m >> 4) & 3){
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case 0: break;
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@ -790,11 +851,11 @@ colormath(void)
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}
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div = (m2 & 0x40) != 0;
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if((m & 2) != 0){
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if((pixelcol[1] & 0x10000) != 0)
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w = pixelcol[1];
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if((pixelcol[1-n] & 0x10000) != 0)
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w = pixelcol[1-n];
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else
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w = cgram[pixelcol[1] & 0xff];
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div = div && (pixelpri[1] & 0xf) != COL;
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w = cgram[pixelcol[1-n] & 0xff];
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div = div && (pixelpri[1-n] & 0xf) != COL;
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}else
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w = subcolor;
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if((m2 & 0x80) != 0){
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@ -833,6 +894,7 @@ ppustep(void)
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mode = reg[BGMODE] & 7;
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bright = reg[INIDISP] & 0xf;
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hires = mode >= 5 && mode < 7 || (reg[SETINI] & 8) != 0;
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yvbl = (reg[SETINI] & OVERSCAN) != 0 ? 0xf0 : 0xe1;
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if(ppux >= XLEFT && ppux <= XRIGHT && ppuy < 0xf0){
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@ -845,9 +907,13 @@ ppustep(void)
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bgs();
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sprites();
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if(ppuy != 0)
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pixeldraw(rx, ppuy - 1, colormath());
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if(hires){
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pixeldraw(rx, ppuy - 1, colormath(1), 0);
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pixeldraw(rx, ppuy - 1, colormath(0), 1);
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}else
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pixeldraw(rx, ppuy - 1, colormath(0), 0);
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}else if(ppuy != 0)
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pixeldraw(rx, ppuy - 1, ppuy >= yvbl ? 0x31c8 : 0);
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pixeldraw(rx, ppuy - 1, ppuy >= yvbl ? 0x6739 : 0, -1);
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}
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if(ppux == 134)
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@ -178,7 +178,7 @@ screeninit(void)
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originwindow(screen, Pt(0, 0), screen->r.min);
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p = divpt(addpt(screen->r.min, screen->r.max), 2);
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picr = (Rectangle){subpt(p, Pt(scale * 128, scale * 112)), addpt(p, Pt(scale * 128, scale * 112))};
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picr = (Rectangle){subpt(p, Pt(scale * 128, scale * 112)), addpt(p, Pt(scale * 128, scale * 127))};
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tmp = allocimage(display, Rect(0, 0, scale * 256, scale > 1 ? 1 : scale * 239), RGB15, scale > 1, 0);
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bg = allocimage(display, Rect(0, 0, 1, 1), screen->chan, 1, 0xCCCCCCFF);
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draw(screen, screen->r, bg, nil, ZP);
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