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vdp renderer, partial sync 8bit fast ARM asm with C code

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This commit is contained in:
kub 2021-01-21 19:09:17 +01:00
parent 1cc774814d
commit 959ea39b23
4 changed files with 59 additions and 38 deletions
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37
pico/draw2.c
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@ -34,7 +34,7 @@ void (*PicoPrepareCram)()=0; // prepares PicoCramHigh for renderer to
// stuff available in asm:
#ifdef _ASM_DRAW_C
void BackFillFull(void *dst, int reg7);
void BackFillFull(void *dst, int reg7, int lwidth);
void DrawLayerFull(int plane, u32 *hcache, int planestart, int planeend,
struct PicoEState *est);
void DrawTilesFromCacheF(u32 *hc, struct PicoEState *est);
@ -183,7 +183,7 @@ static void DrawWindowFull(int start, int end, int prio, struct PicoEState *est)
nametab += nametab_step*(start-scrstart);
// check priority
code=PicoMem.vram[nametab+tile_start];
code=est->PicoMem_vram[nametab+tile_start];
if ((code>>15) != prio) return; // hack: just assume that whole window uses same priority
scrpos+=8*est->Draw2Width+8;
@ -197,7 +197,7 @@ static void DrawWindowFull(int start, int end, int prio, struct PicoEState *est)
// unsigned short *pal=NULL;
unsigned char pal;
code=PicoMem.vram[nametab+tilex];
code=est->PicoMem_vram[nametab+tilex];
if (code==blank) continue;
// Get tile address/2:
@ -250,7 +250,7 @@ static void DrawLayerFull(int plane, u32 *hcache, int planestart, int planeend,
if(!(pvid->reg[11]&3)) { // full screen scroll
// Get horizontal scroll value
hscroll=PicoMem.vram[htab&0x7fff];
hscroll=est->PicoMem_vram[htab&0x7fff];
htab = 0; // this marks that we don't have to update scroll value
}
@ -297,7 +297,7 @@ static void DrawLayerFull(int plane, u32 *hcache, int planestart, int planeend,
if(htab) {
int htaddr=htab+(trow<<4);
if(trow) htaddr-=(vscroll&7)<<1;
hscroll=PicoMem.vram[htaddr&0x7fff];
hscroll=est->PicoMem_vram[htaddr&0x7fff];
}
// Draw tiles across screen:
@ -323,7 +323,7 @@ static void DrawLayerFull(int plane, u32 *hcache, int planestart, int planeend,
#endif
vsidx++;
code=PicoMem.vram[nametab_row+(tilex&xmask)];
code=est->PicoMem_vram[nametab_row+(tilex&xmask)];
if (code==blank) continue;
if (code>>15) { // high priority tile
@ -442,18 +442,19 @@ static void DrawSpriteFull(unsigned int *sprite, struct PicoEState *est)
pal=(unsigned char)((code>>9)&0x30);
// goto first vertically visible tile
while(sy <= scrstart*8) { sy+=8; tile+=tdeltay; height--; }
sy -= scrstart*8;
while(sy <= 0) { sy+=8; tile+=tdeltay; height--; }
scrpos = est->Draw2FB;
if (est->rendstatus&PDRAW_BORDER_32)
scrpos += 32;
scrpos+=(sy-scrstart*8)*est->Draw2Width;
scrpos+=sy*est->Draw2Width;
for (; height > 0; height--, sy+=8, tile+=tdeltay)
{
int w = width, x=sx, t=tile, s;
if((sy-scrstart*8) >= END_ROW*8+8) return; // offscreen
if(sy >= END_ROW*8+8) return; // offscreen
for (; w; w--,x+=8,t+=tdeltax)
{
@ -502,7 +503,7 @@ static void DrawAllSpritesFull(int prio, int maxwidth, struct PicoEState *est)
unsigned int *sprite=NULL;
int code, code2, sx, sy, height;
sprite=(u32 *)(PicoMem.vram+((table+(link<<2))&0x7ffc)); // Find sprite
sprite=(u32 *)(est->PicoMem_vram+((table+(link<<2))&0x7ffc)); // Find sprite
// get sprite info
code = sprite[0];
@ -559,16 +560,18 @@ static void DrawAllSpritesFull(int prio, int maxwidth, struct PicoEState *est)
}
#ifndef _ASM_DRAW_C
static void BackFillFull(void *dst, int reg7)
static void BackFillFull(unsigned char *dst, int reg7, int lwidth)
{
unsigned int back;
int i;
// Start with a background color:
back=reg7&0x3f;
back|=back<<8;
back|=back<<16;
memset32(dst, back, Pico.est.Draw2Width*(8+(END_ROW-START_ROW)*8)/4);
for (i = 0, dst += 8*lwidth; i < (END_ROW-START_ROW)*8; i++, dst += lwidth)
memset32(dst+8, back, 320/4);
}
#endif
@ -589,19 +592,19 @@ static void DrawDisplayFull(void)
}
if(est->rendstatus & PDRAW_30_ROWS) {
// In 240 line mode, the top and bottom 8 lines are omitted
// since this renderer always renderers 224 lines
// since this renderer always renders 224 lines
scrstart ++, scrend ++;
}
est->Draw2Start = scrstart;
planestart = scrstart, planeend = scrend;
winstart = scrstart, winend = scrend;
// 32C border for centering? (for asm)
est->rendstatus &= ~PDRAW_BORDER_32;
if ((est->rendstatus&PDRAW_32_COLS) && !(PicoIn.opt&POPT_DIS_32C_BORDER))
est->rendstatus |= PDRAW_BORDER_32;
planestart = scrstart, planeend = scrend;
winstart = scrstart, winend = scrend;
// horizontal window?
if ((win=pvid->reg[0x12]))
{
@ -716,7 +719,7 @@ PICO_INTERNAL void PicoFrameFull()
if (PicoPrepareCram) PicoPrepareCram();
// Draw screen:
BackFillFull(Pico.est.Draw2FB, Pico.video.reg[7]);
BackFillFull(Pico.est.Draw2FB, Pico.video.reg[7], Pico.est.Draw2Width);
if (Pico.video.reg[1] & 0x40)
DrawDisplayFull();