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md vdp, fix sprite parsing (done on previous line)

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This commit is contained in:
kub 2023-03-26 10:33:29 +00:00
parent e5a1d4c5f1
commit ac89144969
3 changed files with 20 additions and 16 deletions
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26
pico/draw.c
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@ -63,7 +63,7 @@ static u32 HighCacheA[41*2+1]; // caches for high layers
static u32 HighCacheB[41*2+1];
static s32 HighPreSpr[80*2+1]; // slightly preprocessed sprites
u32 VdpSATCache[128]; // VDP sprite cache (1st 32 sprite attr bits)
u32 VdpSATCache[2*128]; // VDP sprite cache (1st 32 sprite attr bits)
// NB don't change any defines without checking their usage in ASM
@ -1401,7 +1401,7 @@ static void DrawSpritesForced(unsigned char *sprited)
// Index + 0 : hhhhvvvv ----hhvv yyyyyyyy yyyyyyyy // v, h: vert./horiz. size
// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
static NOINLINE void PrepareSprites(int max_lines)
static NOINLINE void ParseSprites(int max_lines)
{
const struct PicoVideo *pvid=&Pico.video;
const struct PicoEState *est=&Pico.est;
@ -1411,6 +1411,12 @@ static NOINLINE void PrepareSprites(int max_lines)
int max_sprites = 80, max_width = 328;
int max_line_sprites = 20; // 20 sprites, 40 tiles
// SAT scanning is one line ahead, but don't overshoot. Technically, SAT
// parsing for line 0 is on the last line of the previous frame.
int first_line = Pico.est.DrawScanline + !!Pico.est.DrawScanline;
if (max_lines > rendlines-1)
max_lines = rendlines-1;
if (!(Pico.video.reg[12]&1))
max_sprites = 64, max_line_sprites = 16, max_width = 264;
if (*est->PicoOpt & POPT_DIS_SPRITE_LIM)
@ -1422,7 +1428,7 @@ static NOINLINE void PrepareSprites(int max_lines)
if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
table<<=8; // Get sprite table address/2
for (u = est->DrawScanline; u < max_lines; u++)
for (u = first_line; u <= max_lines; u++)
*((int *)&HighLnSpr[u][0]) = 0;
for (u = 0; u < max_sprites && link < max_sprites; u++)
@ -1434,7 +1440,7 @@ static NOINLINE void PrepareSprites(int max_lines)
// parse sprite info. the 1st half comes from the VDPs internal cache,
// the 2nd half is read from VRAM
code = CPU_LE2(VdpSATCache[link]); // normally same as sprite[0]
code = CPU_LE2(VdpSATCache[2*link]); // normally same as sprite[0]
sy = (code&0x1ff)-0x80;
hv = (code>>24)&0xf;
height = (hv&3)+1;
@ -1444,7 +1450,7 @@ static NOINLINE void PrepareSprites(int max_lines)
sx = (code2>>16)&0x1ff;
sx -= 0x78; // Get X coordinate + 8
if (sy < max_lines && sy + (height<<3) >= est->DrawScanline) // sprite onscreen (y)?
if (sy <= max_lines && sy + (height<<3) >= first_line) // sprite onscreen (y)?
{
int entry, y, w, sx_min, onscr_x, maybe_op = 0;
@ -1454,8 +1460,8 @@ static NOINLINE void PrepareSprites(int max_lines)
maybe_op = SPRL_MAY_HAVE_OP;
entry = ((pd - HighPreSpr) / 2) | ((code2>>8)&0x80);
y = (sy >= est->DrawScanline) ? sy : est->DrawScanline;
for (; y < sy + (height<<3) && y < max_lines; y++)
y = (sy >= first_line) ? sy : first_line;
for (; y < sy + (height<<3) && y <= max_lines; y++)
{
unsigned char *p = &HighLnSpr[y][0];
int cnt = p[0];
@ -1501,7 +1507,7 @@ static NOINLINE void PrepareSprites(int max_lines)
*pd = 0;
#if 0
for (u = 0; u < max_lines; u++)
for (u = first_line; u <= max_lines; u++)
{
int y;
printf("c%03i: f %x c %2i/%2i w %2i: ", u, HighLnSpr[u][1],
@ -1982,9 +1988,9 @@ void PicoDrawSync(int to, int blank_last_line)
if (to > 223)
to = 223;
}
if (est->DrawScanline <= to - blank_last_line && (est->rendstatus &
if (est->DrawScanline <= to && (est->rendstatus &
(PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES|PDRAW_PARSE_SPRITES)))
PrepareSprites(to - blank_last_line + 1);
ParseSprites(to + 1);
for (line = est->DrawScanline; line < to; line++)
PicoLine(line, offs, sh, bgc);