mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 07:17:45 -04:00
vdp rendering fixes (debug register, vscroll) for overdrive 2
This commit is contained in:
kub
parent
c55a44a88c
commit
6dd553c7a8
2 changed files with 218 additions and 48 deletions
258
pico/draw.c
258
pico/draw.c
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@ -29,6 +29,7 @@
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*/
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#include "pico_int.h"
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#define FORCE // layer forcing via debug register?
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int (*PicoScanBegin)(unsigned int num) = NULL;
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int (*PicoScanEnd) (unsigned int num) = NULL;
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@ -222,6 +223,7 @@ TileFlipMakerAS(TileFlipSH_AS_onlyop_lp, pix_sh_as_onlyop)
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TileNormMakerAS(TileNormAS_onlymark, pix_sh_as_onlymark)
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TileFlipMakerAS(TileFlipAS_onlymark, pix_sh_as_onlymark)
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#ifdef FORCE
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// forced both layer draw (through debug reg)
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#define pix_and(x) \
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pd[x] = (pd[x] & 0xc0) | (pd[x] & (pal | t))
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@ -230,12 +232,16 @@ TileNormMaker(TileNorm_and, pix_and)
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TileFlipMaker(TileFlip_and, pix_and)
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// forced sprite draw (through debug reg)
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#define pix_sh_and(x) /* XXX is there S/H with forced draw? */ \
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if (t>=0xe) pd[x]=(pd[x]&0x3f)|(t<<6); /* c0 shadow, 80 hilight */ \
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else pd[x] = (pd[x] & 0xc0) | (pd[x] & (pal | t))
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#define pix_sh_as_and(x) /* XXX is there S/H with forced draw? */ \
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if (m & (1<<(x+8))) { \
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m &= ~(1<<(x+8)); \
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if (t>=0xe) pd[x]=(pd[x]&0x3f)|(t<<6); /* c0 shadow, 80 hilight */ \
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else pd[x] = (pd[x] & 0xc0) | (pd[x] & (pal | t)); \
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}
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TileNormMaker(TileNormSH_and, pix_sh_and)
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TileFlipMaker(TileFlipSH_and, pix_sh_and)
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TileNormMakerAS(TileNormSH_AS_and, pix_sh_as_and)
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TileFlipMakerAS(TileFlipSH_AS_and, pix_sh_as_and)
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#endif
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// --------------------------------------------
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@ -311,6 +317,7 @@ static void DrawStripVSRam(struct TileStrip *ts, int plane_sh, int cellskip)
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int adj = ((ts->hscroll ^ dx) >> 3) & 1;
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cell -= adj + 1;
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ts->cells -= adj;
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PicoMem.vsram[0x3e] = PicoMem.vsram[0x3f] = plane_sh >> 16;
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}
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cell+=cellskip;
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tilex+=cellskip;
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@ -479,7 +486,7 @@ static void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells,
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// shit, we have 2-cell column based vscroll
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// luckily this doesn't happen too often
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ts.line=ymask|(shift[width]<<24); // save some stuff instead of line
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PicoMem.vsram[(plane_sh & 1)+0x3e] = PicoMem.vsram[0x27]; // XXX really?
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plane_sh |= PicoMem.vsram[0x26+(~plane_sh&1)] << 16;
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DrawStripVSRam(&ts, plane_sh, cellskip);
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} else {
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vscroll = PicoMem.vsram[plane_sh & 1]; // Get vertical scroll value
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@ -778,28 +785,6 @@ static void DrawSprite(int *sprite, int sh, int w)
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}
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#endif
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static NOINLINE void DrawTilesFromCacheForced(const int *hc)
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{
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unsigned char *pd = Pico.est.HighCol;
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int code, addr, dx;
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unsigned int pack;
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int pal;
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// *ts->hc++ = code | (dx<<16) | (ty<<25);
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while ((code = *hc++)) {
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// Get tile address/2:
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addr = (code & 0x7ff) << 4;
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addr += (code >> 25) & 0x0e; // y offset into tile
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dx = (code >> 16) & 0x1ff;
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pal = ((code >> 9) & 0x30);
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pack = *(unsigned int *)(PicoMem.vram + addr);
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if (code & 0x0800) TileFlip_and(pd + dx, pack, pal);
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else TileNorm_and(pd + dx, pack, pal);
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}
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}
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static void DrawSpriteInterlace(unsigned int *sprite)
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{
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unsigned char *pd = Pico.est.HighCol;
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@ -1040,16 +1025,181 @@ static void DrawSpritesHiAS(unsigned char *sprited, int sh)
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}
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}
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#ifdef FORCE
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static void DrawStripForced(struct TileStrip *ts, int lflags, int cellskip)
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{
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unsigned char *pd = Pico.est.HighCol;
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int tilex,dx,ty,code=0,addr=0,cells;
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int oldcode=-1;
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int pal=0,sh;
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// Draw tiles across screen:
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sh = (lflags & LF_SH) << 5; // 0x40
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tilex=((-ts->hscroll)>>3)+cellskip;
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ty=(ts->line&7)<<1; // Y-Offset into tile
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dx=((ts->hscroll-1)&7)+1;
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cells = ts->cells - cellskip;
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if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
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dx+=cellskip<<3;
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for (; cells > 0; dx+=8, tilex++, cells--)
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{
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unsigned int pack;
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code = PicoMem.vram[ts->nametab + (tilex & ts->xmask)];
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if (code!=oldcode) {
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oldcode = code;
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// Get tile address/2:
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addr=(code&0x7ff)<<4;
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addr+=ty;
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if (code&0x1000) addr^=0xe; // Y-flip
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pal=((code>>9)&0x30)|sh;
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}
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pack = *(unsigned int *)(PicoMem.vram + addr);
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if (code & 0x0800) TileFlip_and(pd + dx, pack, pal);
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else TileNorm_and(pd + dx, pack, pal);
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}
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}
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// this is messy
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static void DrawStripVSRamForced(struct TileStrip *ts, int plane_sh, int cellskip)
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{
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unsigned char *pd = Pico.est.HighCol;
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int tilex,dx,code=0,addr=0,cell=0;
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int oldcode=-1;
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int pal=0,scan=Pico.est.DrawScanline;
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// Draw tiles across screen:
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tilex=(-ts->hscroll)>>3;
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dx=((ts->hscroll-1)&7)+1;
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if (ts->hscroll & 0x0f) {
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int adj = ((ts->hscroll ^ dx) >> 3) & 1;
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cell -= adj + 1;
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ts->cells -= adj;
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PicoMem.vsram[0x3e] = PicoMem.vsram[0x3f] = plane_sh >> 16;
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}
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cell+=cellskip;
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tilex+=cellskip;
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dx+=cellskip<<3;
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for (; cell < ts->cells; dx+=8,tilex++,cell++)
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{
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int nametabadd, ty;
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unsigned int pack;
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//if((cell&1)==0)
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{
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int line,vscroll;
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vscroll=PicoMem.vsram[(plane_sh&1)+(cell&0x3e)];
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// Find the line in the name table
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line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..
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nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]
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ty=(line&7)<<1; // Y-Offset into tile
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}
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code=PicoMem.vram[ts->nametab+nametabadd+(tilex&ts->xmask)];
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if (code!=oldcode) {
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oldcode = code;
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// Get tile address/2:
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addr=(code&0x7ff)<<4;
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pal=((code>>9)&0x30)|((plane_sh<<5)&0x40);
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}
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if (code & 0x1000) ty ^= 0xe; // Y-flip
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pack = *(unsigned int *)(PicoMem.vram + addr+ty);
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if (code & 0x0800) TileFlip_and(pd + dx, pack, pal);
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else TileNorm_and(pd + dx, pack, pal);
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}
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}
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static void DrawLayerForced(int plane_sh, int cellskip, int maxcells,
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struct PicoEState *est)
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{
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struct PicoVideo *pvid=&Pico.video;
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const char shift[4]={5,6,5,7}; // 32,64 or 128 sized tilemaps (2 is invalid)
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struct TileStrip ts;
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int width, height, ymask;
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int vscroll, htab;
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ts.cells=maxcells;
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// Work out the TileStrip to draw
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// Work out the name table size: 32 64 or 128 tiles (0-3)
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width=pvid->reg[16];
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height=(width>>4)&3; width&=3;
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ts.xmask=(1<<shift[width])-1; // X Mask in tiles (0x1f-0x7f)
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ymask=(height<<8)|0xff; // Y Mask in pixels
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switch (width) {
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case 1: ymask &= 0x1ff; break;
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case 2: ymask = 0x007; break;
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case 3: ymask = 0x0ff; break;
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}
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// Find name table:
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if (plane_sh&1) ts.nametab=(pvid->reg[4]&0x07)<<12; // B
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else ts.nametab=(pvid->reg[2]&0x38)<< 9; // A
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htab=pvid->reg[13]<<9; // Horizontal scroll table address
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switch (pvid->reg[11]&3) {
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case 1: htab += (est->DrawScanline<<1) & 0x0f; break;
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case 2: htab += (est->DrawScanline<<1) & ~0x0f; break; // Offset by tile
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case 3: htab += (est->DrawScanline<<1); break; // Offset by line
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}
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htab+=plane_sh&1; // A or B
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// Get horizontal scroll value, will be masked later
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ts.hscroll = PicoMem.vram[htab & 0x7fff];
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if((pvid->reg[12]&6) == 6) {
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// interlace mode 2
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vscroll = PicoMem.vsram[plane_sh & 1]; // Get vertical scroll value
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// Find the line in the name table
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ts.line=(vscroll+(est->DrawScanline<<1))&((ymask<<1)|1);
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ts.nametab+=(ts.line>>4)<<shift[width];
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DrawStripInterlace(&ts);
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} else if( pvid->reg[11]&4) {
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// shit, we have 2-cell column based vscroll
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// luckily this doesn't happen too often
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ts.line=ymask|(shift[width]<<24); // save some stuff instead of line
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plane_sh |= PicoMem.vsram[0x26+(~plane_sh&1)] << 16;
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DrawStripVSRamForced(&ts, plane_sh, cellskip);
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} else {
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vscroll = PicoMem.vsram[plane_sh & 1]; // Get vertical scroll value
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// Find the line in the name table
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ts.line=(vscroll+est->DrawScanline)&ymask;
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ts.nametab+=(ts.line>>3)<<shift[width];
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DrawStripForced(&ts, plane_sh, cellskip);
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}
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}
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// rather messy (XXX revisit layer compositing)
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static void DrawSpritesForced(unsigned char *sprited)
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{
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void (*fTileFunc)(unsigned char *pd, unsigned int pack, int pal);
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unsigned (*fTileFunc)(unsigned char *pd, unsigned m, unsigned int pack, int pal);
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unsigned char *pd = Pico.est.HighCol;
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unsigned char *p;
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unsigned char mb[1+320+1];
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unsigned char *p, *mp;
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unsigned m;
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int entry, cnt;
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cnt = sprited[0] & 0x7f;
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if (cnt == 0) return;
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if (cnt == 0) { memset(pd, 0, sizeof(DefHighCol)); return; }
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memset(mb, 0xff, sizeof(mb));
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p = &sprited[4];
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if ((sprited[1] & (SPRL_TILE_OVFL|SPRL_HAVE_MASK0)) == (SPRL_TILE_OVFL|SPRL_HAVE_MASK0))
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return; // masking effective due to tile overflow
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@ -1065,8 +1215,8 @@ static void DrawSpritesForced(unsigned char *sprited)
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code = sprite[1];
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pal = (code>>9)&0x30;
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if (code&0x800) fTileFunc = TileFlipSH_and;
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else fTileFunc = TileNormSH_and;
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if (code&0x800) fTileFunc = TileFlipSH_AS_and;
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else fTileFunc = TileNormSH_AS_and;
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// parse remaining sprite data
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sy=sprite[0];
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@ -1087,7 +1237,8 @@ static void DrawSpritesForced(unsigned char *sprited)
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delta<<=4; // Delta of address
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if (entry+1 == cnt) width = p[entry+1]; // last sprite width limited?
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for (; width; width--,sx+=8,tile+=delta)
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mp = mb+(sx>>3);
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for (m = *mp; width; width--, sx+=8, *mp++ = m, m >>= 8, tile+=delta)
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{
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unsigned int pack;
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@ -1095,10 +1246,25 @@ static void DrawSpritesForced(unsigned char *sprited)
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if(sx>=328) break; // Offscreen
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pack = *(unsigned int *)(PicoMem.vram + (tile & 0x7fff));
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fTileFunc(pd + sx, pack, pal);
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}
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m |= mp[1] << 8; // next mask byte
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// shift mask bits to bits 8-15 for easier load/store handling
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m = fTileFunc(pd + sx, m << (8-(sx&0x7)), pack, pal) >> (8-(sx&0x7));
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}
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*mp = m; // write last mask byte
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}
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// anything not covered by a sprite is off (XXX or bg?)
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for (cnt = 1; cnt < sizeof(mb)-1; cnt++)
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if (mb[cnt] == 0xff)
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for (m = 0; m < 8; m++)
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pd[8*cnt+m] = 0;
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else if (mb[cnt])
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for (m = 0; m < 8; m++)
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if (mb[cnt] & (1<<m))
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pd[8*cnt+m] = 0;
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}
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#endif
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// Index + 0 : ----hhvv -lllllll -------y yyyyyyyy
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@ -1462,14 +1628,10 @@ static int DrawDisplay(int sh)
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/* - layer B low - */
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if (!(pvid->debug_p & PVD_KILL_B)) {
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lflags = LF_PLANE_1 | (sh << 1);
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if (pvid->debug_p & PVD_FORCE_B)
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lflags |= LF_FORCE;
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DrawLayer(lflags, HighCacheB, 0, maxcells, est);
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}
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/* - layer A low - */
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lflags = 0 | (sh << 1);
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if (pvid->debug_p & PVD_FORCE_A)
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lflags |= LF_FORCE;
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if (pvid->debug_p & PVD_KILL_A)
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;
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else if (hvwind == 1)
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@ -1516,12 +1678,16 @@ static int DrawDisplay(int sh)
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else if (sprited[1] & SPRL_HAVE_HI)
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DrawAllSprites(sprited, 1, 0, est);
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if (pvid->debug_p & PVD_FORCE_B)
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DrawTilesFromCacheForced(HighCacheB);
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else if (pvid->debug_p & PVD_FORCE_A)
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DrawTilesFromCacheForced(HighCacheA);
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else if (pvid->debug_p & PVD_FORCE_S)
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#ifdef FORCE
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if (pvid->debug_p & PVD_FORCE_B) {
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lflags = LF_PLANE_1 | (sh << 1);
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DrawLayerForced(lflags, 0, maxcells, est);
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} else if (pvid->debug_p & PVD_FORCE_A) {
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lflags = (sh << 1);
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DrawLayerForced(lflags, 0, maxcells, est);
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} else if (pvid->debug_p & PVD_FORCE_S)
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DrawSpritesForced(sprited);
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#endif
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#if 0
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{
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@ -545,8 +545,12 @@ DrawLayer:
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eor r3, r3, r7
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sub r10,r10, #1<<24 @ cell-- // start from negative for hscroll
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tst r3, #0x08
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add_c24 r1, lr, (OFS_PMEM_vsram-OFS_PMEM_vram)
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ldr r3, [r1, #0x4c] @ r3=vsram[0x26..0x27]
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subne r10,r10, #1<<16 @ cells--
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subne r10,r10, #1<<24 @ cell-- // even more negative
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ror r3, r3, #16
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str r3, [r1, #0x7c] @ vsram[0x3e..0x3f]=r3
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0:
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tst r9, #1<<31
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mov r3, #0
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@ -577,8 +581,8 @@ DrawLayer:
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@ calc offset and read tileline code to r7, also calc ty
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add_c24 r7, lr, (OFS_PMEM_vsram-OFS_PMEM_vram)
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add r7, r7, r10,asr #23 @ vsram + ((cell&~1)<<1)
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bic r7, r7, #3
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and r4, r10, #0x3e000000
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add r7, r7, r4, asr #23 @ vsram + ((cell&0x3e)<<1)
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tst r10,#0x8000 @ plane1?
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addne r7, r7, #2
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ldrh r7, [r7] @ r7=vscroll
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