summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--sys/src/games/snes/ppu.c160
-rw-r--r--sys/src/games/snes/snes.c2
2 files changed, 114 insertions, 48 deletions
diff --git a/sys/src/games/snes/ppu.c b/sys/src/games/snes/ppu.c
index eb0d222f6..0ae2ccfb9 100644
--- a/sys/src/games/snes/ppu.c
+++ b/sys/src/games/snes/ppu.c
@@ -5,7 +5,7 @@
#include "fns.h"
int ppux, ppuy, rx;
-static u8int mode, bright, pixelpri[2];
+static u8int mode, bright, pixelpri[2], hires;
static u32int pixelcol[2];
u16int vtime = 0x1ff, htime = 0x1ff, subcolor;
uchar pic[256*239*2*3];
@@ -38,13 +38,13 @@ darken(u16int v)
}
static void
-pixeldraw(int x, int y, u16int v)
+pixeldraw(int x, int y, u16int v, int s)
{
uchar *p;
u16int *q;
union { u16int w; u8int b[2]; } u;
- if(bright != 0xf)
+ if(bright != 0xf && s >= 0)
v = darken(v);
if(scale == 1){
p = pic + (x + y * 256) * 2;
@@ -56,7 +56,8 @@ pixeldraw(int x, int y, u16int v)
u.b[1] = v >> 8;
if(scale == 2){
q = (u16int*)pic + (x + y * 256) * 2;
- q[0] = u.w;
+ if(s < 1)
+ q[0] = u.w;
q[1] = u.w;
}else{
q = (u16int*)pic + (x + y * 256) * 3;
@@ -94,7 +95,7 @@ window(int n)
}
static void
-pixel(int n, int v, int pri)
+npixel(int n, int v, int pri)
{
int a;
@@ -109,6 +110,32 @@ pixel(int n, int v, int pri)
}
}
+static void
+spixel(int n, int v, int pri)
+{
+ int a;
+
+ a = 1<<n;
+ if((reg[TS] & a) != 0 && pri > pixelpri[1] && ((reg[TSW] & a) == 0 || !window(n))){
+ pixelcol[1] = v;
+ pixelpri[1] = pri;
+ }
+}
+
+static void
+mpixel(int n, int v, int pri)
+{
+ int a;
+
+ a = 1<<n;
+ if((reg[TM] & a) != 0 && pri > pixelpri[0] && ((reg[TMW] & a) == 0 || !window(n))){
+ pixelcol[0] = v;
+ pixelpri[0] = pri;
+ }
+}
+
+static void (*pixel)(int, int, int) = npixel;
+
static u16int
tile(int n, int tx, int ty)
{
@@ -127,16 +154,18 @@ tile(int n, int tx, int ty)
}
static void
-chr(int n, int nb, int sz, u16int t, int x, int y, u32int c[])
+chr(int n, int nb, int w, int h, u16int t, int x, int y, u32int c[])
{
u16int a;
- if(sz == 16){
+ if(w == 16)
+ t += (x >> 3 ^ t >> 14) & 1;
+ if(h == 16){
if(y >= 8){
- t += ((x >> 3 ^ t >> 14) & 1) + ((~t >> 11) & 16);
+ t += (~t >> 11) & 16;
y -= 8;
}else
- t += ((x >> 3 ^ t >> 14) & 1) + ((t >> 11) & 16);
+ t += (t >> 11) & 16;
}
if((t & 0x8000) != 0)
y = 7 - y;
@@ -235,7 +264,7 @@ bgpixel(u32int *c, int nb, int d)
}
static struct bgctxt {
- u8int sz, szsh, nb, pri[2];
+ u8int w, h, wsh, hsh, nb, pri[2];
u16int tx, ty, tnx, tny;
u16int t;
u32int c[2];
@@ -251,8 +280,10 @@ bginit(int n, int nb, int prilo, int prihi)
int sx, sy;
p = bgctxts + n;
- p->szsh = (reg[BGMODE] & (1<<(4+n))) != 0 ? 4 : 3;
- p->sz = 1<<p->szsh;
+ p->hsh = ((reg[BGMODE] & (1<<(4+n))) != 0) ? 4 : 3;
+ p->wsh = mode >= 5 ? 4 : p->hsh;
+ p->h = 1<<p->hsh;
+ p->w = 1<<p->wsh;
p->nb = nb;
p->pri[0] = prilo;
p->pri[1] = prihi;
@@ -266,13 +297,15 @@ bginit(int n, int nb, int prilo, int prihi)
}
}else
p->msz = 1;
+ if(mode >= 5)
+ sx <<= 1;
redo:
- p->tx = sx >> p->szsh;
- p->tnx = sx & (p->sz - 1);
- p->ty = sy >> p->szsh;
- p->tny = sy & (p->sz - 1);
+ p->tx = sx >> p->wsh;
+ p->tnx = sx & (p->w - 1);
+ p->ty = sy >> p->hsh;
+ p->tny = sy & (p->h - 1);
p->t = tile(n, p->tx, p->ty);
- chr(n, nb, p->sz, p->t, p->tnx, p->tny, p->c);
+ chr(n, nb, p->w, p->h, p->t, p->tnx, p->tny, p->c);
p->pal = palette(n, p->t >> 10 & 7);
if((p->tnx & 7) != 0)
shift(p->c, nb, p->tnx & 7, p->t & 0x4000);
@@ -305,14 +338,14 @@ bg(int n)
}
if(v != 0)
pixel(n, p->pal + v, p->pri[(p->t & 0x2000) != 0]);
- if(++p->tnx == p->sz){
+ if(++p->tnx == p->w){
p->tx++;
p->tnx = 0;
p->t = tile(n, p->tx, p->ty);
p->pal = palette(n, p->t >> 10 & 7);
}
if((p->tnx & 7) == 0)
- chr(n, p->nb, p->sz, p->t, p->tnx, p->tny, p->c);
+ chr(n, p->nb, p->w, p->h, p->t, p->tnx, p->tny, p->c);
}
static void
@@ -321,10 +354,12 @@ optinit(void)
struct bgctxt *p;
p = bgctxts + 2;
- p->szsh = (reg[BGMODE] & (1<<6)) != 0 ? 4 : 3;
- p->sz = 1<<p->szsh;
- p->tnx = hofs[2] & (p->sz - 1);
- p->tx = hofs[2] >> p->szsh;
+ p->hsh = (reg[BGMODE] & (1<<6)) != 0 ? 4 : 3;
+ p->wsh = mode >= 5 ? 4 : p->hsh;
+ p->w = 1<<p->wsh;
+ p->h = 1<<p->hsh;
+ p->tnx = hofs[2] & (p->w - 1);
+ p->tx = hofs[2] >> p->wsh;
bgctxts[0].otx = bgctxts[1].otx = 0xffff;
bgctxts[0].oty = bgctxts[0].ty;
bgctxts[0].otny = bgctxts[0].tny;
@@ -340,40 +375,40 @@ opt(void)
int sx, sy;
p = bgctxts + 2;
- if(++p->tnx == p->sz){
+ if(++p->tnx == p->w){
if(mode == 4){
- hval = tile(2, p->tx, vofs[2] >> p->szsh);
+ hval = tile(2, p->tx, vofs[2] >> p->hsh);
if((hval & 0x8000) != 0){
vval = hval;
hval = 0;
}else
vval = 0;
}else{
- hval = tile(2, p->tx, vofs[2] >> p->szsh);
- vval = tile(2, p->tx, (vofs[2]+8) >> p->szsh);
+ hval = tile(2, p->tx, vofs[2] >> p->hsh);
+ vval = tile(2, p->tx, (vofs[2]+8) >> p->hsh);
}
sx = (rx & ~7) + (hval & 0x1ff8);
sy = ppuy + (vval & 0x1fff);
if((vval & 0x2000) != 0){
- bgctxts[0].oty = sy >> bgctxts[0].szsh;
- bgctxts[0].otny = sy & (bgctxts[0].sz - 1);
+ bgctxts[0].oty = sy >> bgctxts[0].hsh;
+ bgctxts[0].otny = sy & (bgctxts[0].h - 1);
}else{
bgctxts[0].oty = bgctxts[0].ty;
bgctxts[0].otny = bgctxts[0].tny;
}
if((vval & 0x4000) != 0){
- bgctxts[1].oty = sy >> bgctxts[1].szsh;
- bgctxts[1].otny = sy & (bgctxts[1].sz - 1);
+ bgctxts[1].oty = sy >> bgctxts[1].hsh;
+ bgctxts[1].otny = sy & (bgctxts[1].h - 1);
}else{
bgctxts[1].oty = bgctxts[1].ty;
bgctxts[1].otny = bgctxts[1].tny;
}
if((hval & 0x2000) != 0)
- bgctxts[0].otx = sx >> bgctxts[0].szsh;
+ bgctxts[0].otx = sx >> bgctxts[0].wsh;
else
bgctxts[0].otx = 0xffff;
if((hval & 0x4000) != 0)
- bgctxts[1].otx = sx >> bgctxts[1].szsh;
+ bgctxts[1].otx = sx >> bgctxts[1].wsh;
else
bgctxts[1].otx = 0xffff;
p->tnx = 0;
@@ -399,14 +434,14 @@ bgopt(int n)
}
if(v != 0)
pixel(n, p->pal + v, p->pri[(p->t & 0x2000) != 0]);
- if(++p->tnx == p->sz){
+ if(++p->tnx == p->w){
p->tx++;
p->tnx = 0;
}
if((p->tnx & 7) == 0){
p->t = tile(n, p->otx == 0xffff ? p->tx : p->otx, p->oty);
p->pal = palette(n, p->t >> 10 & 7);
- chr(n, p->nb, p->sz, p->t, p->tnx, p->otny, p->c);
+ chr(n, p->nb, p->w, p->h, p->t, p->tnx, p->otny, p->c);
}
}
@@ -526,6 +561,7 @@ bgsinit(void)
{
static int bitch[8];
+ pixel = npixel;
switch(mode){
case 0:
bginit(0, 2, 0x80, 0xb0);
@@ -552,13 +588,21 @@ bgsinit(void)
bginit(1, 2, 0x11, 0x71);
optinit();
break;
+ case 5:
+ bginit(0, 4, 0x40, 0xa0);
+ bginit(1, 2, 0x11, 0x71);
+ break;
+ case 6:
+ bginit(0, 4, 0x40, 0xa0);
+ optinit();
+ break;
case 7:
bg7init(0);
if((reg[SETINI] & EXTBG) != 0)
bg7init(1);
break;
default:
- bgctxts[0].sz = bgctxts[1].sz = 0;
+ bgctxts[0].w = bgctxts[1].w = 0;
if(bitch[mode]++ == 0)
print("bg mode %d not implemented\n", mode);
}
@@ -589,6 +633,23 @@ bgs(void)
bg(0);
bg(1);
break;
+ case 5:
+ pixel = spixel;
+ bg(0);
+ bg(1);
+ pixel = mpixel;
+ bg(0);
+ bg(1);
+ pixel = npixel;
+ break;
+ case 6:
+ opt();
+ pixel = spixel;
+ bgopt(0);
+ pixel = mpixel;
+ bgopt(0);
+ pixel = npixel;
+ break;
case 7:
bg7(0);
if((reg[SETINI] & EXTBG) != 0)
@@ -759,7 +820,7 @@ nope:
}
static u16int
-colormath(void)
+colormath(int n)
{
u16int v, w, r, g, b;
u8int m, m2, div;
@@ -775,12 +836,12 @@ colormath(void)
case 3: v = 0; break;
}
if(v){
- if((pixelcol[0] & 0x10000) != 0)
- v = pixelcol[0];
+ if((pixelcol[n] & 0x10000) != 0)
+ v = pixelcol[n];
else
- v = cgram[pixelcol[0] & 0xff];
+ v = cgram[pixelcol[n] & 0xff];
}
- if((m2 & (1 << (pixelpri[0] & 0xf))) == 0)
+ if((m2 & (1 << (pixelpri[n] & 0xf))) == 0)
return v;
switch((m >> 4) & 3){
case 0: break;
@@ -790,11 +851,11 @@ colormath(void)
}
div = (m2 & 0x40) != 0;
if((m & 2) != 0){
- if((pixelcol[1] & 0x10000) != 0)
- w = pixelcol[1];
+ if((pixelcol[1-n] & 0x10000) != 0)
+ w = pixelcol[1-n];
else
- w = cgram[pixelcol[1] & 0xff];
- div = div && (pixelpri[1] & 0xf) != COL;
+ w = cgram[pixelcol[1-n] & 0xff];
+ div = div && (pixelpri[1-n] & 0xf) != COL;
}else
w = subcolor;
if((m2 & 0x80) != 0){
@@ -833,6 +894,7 @@ ppustep(void)
mode = reg[BGMODE] & 7;
bright = reg[INIDISP] & 0xf;
+ hires = mode >= 5 && mode < 7 || (reg[SETINI] & 8) != 0;
yvbl = (reg[SETINI] & OVERSCAN) != 0 ? 0xf0 : 0xe1;
if(ppux >= XLEFT && ppux <= XRIGHT && ppuy < 0xf0){
@@ -845,9 +907,13 @@ ppustep(void)
bgs();
sprites();
if(ppuy != 0)
- pixeldraw(rx, ppuy - 1, colormath());
+ if(hires){
+ pixeldraw(rx, ppuy - 1, colormath(1), 0);
+ pixeldraw(rx, ppuy - 1, colormath(0), 1);
+ }else
+ pixeldraw(rx, ppuy - 1, colormath(0), 0);
}else if(ppuy != 0)
- pixeldraw(rx, ppuy - 1, ppuy >= yvbl ? 0x31c8 : 0);
+ pixeldraw(rx, ppuy - 1, ppuy >= yvbl ? 0x6739 : 0, -1);
}
if(ppux == 134)
diff --git a/sys/src/games/snes/snes.c b/sys/src/games/snes/snes.c
index 303139f92..27f515155 100644
--- a/sys/src/games/snes/snes.c
+++ b/sys/src/games/snes/snes.c
@@ -178,7 +178,7 @@ screeninit(void)
originwindow(screen, Pt(0, 0), screen->r.min);
p = divpt(addpt(screen->r.min, screen->r.max), 2);
- picr = (Rectangle){subpt(p, Pt(scale * 128, scale * 112)), addpt(p, Pt(scale * 128, scale * 112))};
+ picr = (Rectangle){subpt(p, Pt(scale * 128, scale * 112)), addpt(p, Pt(scale * 128, scale * 127))};
tmp = allocimage(display, Rect(0, 0, scale * 256, scale > 1 ? 1 : scale * 239), RGB15, scale > 1, 0);
bg = allocimage(display, Rect(0, 0, 1, 1), screen->chan, 1, 0xCCCCCCFF);
draw(screen, screen->r, bg, nil, ZP);
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-21 15:03:34 +0000