123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473 |
- // This is part of Pico Library
- // (c) Copyright 2004 Dave, All rights reserved.
- // (c) Copyright 2006-2008 notaz, All rights reserved.
- // Free for non-commercial use.
- // For commercial use, separate licencing terms must be obtained.
- /*
- * The renderer has 4 modes now:
- * - normal
- * - shadow/hilight (s/h)
- * - "sonic mode" for midline palette changes
- * - accurate sprites (AS)
- *
- * AS and s/h both use upper bits for both priority and shadow/hilight flags.
- * "sonic mode" is autodetected, shadow/hilight is enabled by emulated game.
- * AS is enabled by user and takes priority over "sonic mode".
- */
- #include "PicoInt.h"
- int (*PicoScanBegin)(unsigned int num) = NULL;
- int (*PicoScanEnd) (unsigned int num) = NULL;
- #if OVERRIDE_HIGHCOL
- static unsigned char DefHighCol[8+320+8];
- unsigned char *HighCol=DefHighCol;
- #else
- unsigned char HighCol[8+320+8];
- #endif
- unsigned short DefOutBuff[320*2];
- void *DrawLineDest=DefOutBuff; // pointer to dest buffer where to draw this line to
- static int HighCacheA[41+1]; // caches for high layers
- static int HighCacheB[41+1];
- int HighPreSpr[80*2+1]; // slightly preprocessed sprites
- #define SPRL_HAVE_HI 0x80 // have hi priority sprites
- #define SPRL_HAVE_LO 0x40 // *lo*
- #define SPRL_MAY_HAVE_OP 0x20 // may have operator sprites on the line
- #define SPRL_LO_ABOVE_HI 0x10 // low priority sprites may be on top of hi
- unsigned char HighLnSpr[240][3 + MAX_LINE_SPRITES]; // sprite_count, ^flags, tile_count, [spritep]...
- int rendstatus = 0;
- int DrawScanline = 0;
- int PicoDrawMask = -1;
- static int skip_next_line=0;
- //unsigned short ppt[] = { 0x0f11, 0x0ff1, 0x01f1, 0x011f, 0x01ff, 0x0f1f, 0x0f0e, 0x0e7c };
- struct TileStrip
- {
- int nametab; // Position in VRAM of name table (for this tile line)
- int line; // Line number in pixels 0x000-0x3ff within the virtual tilemap
- int hscroll; // Horizontal scroll value in pixels for the line
- int xmask; // X-Mask (0x1f - 0x7f) for horizontal wraparound in the tilemap
- int *hc; // cache for high tile codes and their positions
- int cells; // cells (tiles) to draw (32 col mode doesn't need to update whole 320)
- };
- // stuff available in asm:
- #ifdef _ASM_DRAW_C
- void DrawWindow(int tstart, int tend, int prio, int sh);
- void BackFill(int reg7, int sh);
- void DrawAllSprites(unsigned char *sprited, int prio, int sh);
- void DrawTilesFromCache(int *hc, int sh, int rlim);
- void DrawSpritesSHi(unsigned char *sprited);
- void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells);
- void FinalizeLineBGR444(int sh);
- void FinalizeLineRGB555(int sh);
- void *blockcpy(void *dst, const void *src, size_t n);
- void blockcpy_or(void *dst, void *src, size_t n, int pat);
- #else
- // utility
- void blockcpy_or(void *dst, void *src, size_t n, int pat)
- {
- unsigned char *pd = dst, *ps = src;
- for (; n; n--)
- *pd++ = (unsigned char) (*ps++ | pat);
- }
- #define blockcpy memcpy
- #endif
- #define TileNormMaker(funcname,pix_func) \
- static int funcname(int sx,int addr,int pal) \
- { \
- unsigned char *pd = HighCol+sx; \
- unsigned int pack=0; unsigned int t=0; \
- \
- pack=*(unsigned int *)(Pico.vram+addr); /* Get 8 pixels */ \
- if (pack) \
- { \
- t=(pack&0x0000f000)>>12; pix_func(0); \
- t=(pack&0x00000f00)>> 8; pix_func(1); \
- t=(pack&0x000000f0)>> 4; pix_func(2); \
- t=(pack&0x0000000f) ; pix_func(3); \
- t=(pack&0xf0000000)>>28; pix_func(4); \
- t=(pack&0x0f000000)>>24; pix_func(5); \
- t=(pack&0x00f00000)>>20; pix_func(6); \
- t=(pack&0x000f0000)>>16; pix_func(7); \
- return 0; \
- } \
- \
- return 1; /* Tile blank */ \
- }
- #define TileFlipMaker(funcname,pix_func) \
- static int funcname(int sx,int addr,int pal) \
- { \
- unsigned char *pd = HighCol+sx; \
- unsigned int pack=0; unsigned int t=0; \
- \
- pack=*(unsigned int *)(Pico.vram+addr); /* Get 8 pixels */ \
- if (pack) \
- { \
- t=(pack&0x000f0000)>>16; pix_func(0); \
- t=(pack&0x00f00000)>>20; pix_func(1); \
- t=(pack&0x0f000000)>>24; pix_func(2); \
- t=(pack&0xf0000000)>>28; pix_func(3); \
- t=(pack&0x0000000f) ; pix_func(4); \
- t=(pack&0x000000f0)>> 4; pix_func(5); \
- t=(pack&0x00000f00)>> 8; pix_func(6); \
- t=(pack&0x0000f000)>>12; pix_func(7); \
- return 0; \
- } \
- \
- return 1; /* Tile blank */ \
- }
- #ifdef _ASM_DRAW_C_AMIPS
- int TileNorm(int sx,int addr,int pal);
- int TileFlip(int sx,int addr,int pal);
- #else
- #define pix_just_write(x) \
- if (t) pd[x]=pal|t
- TileNormMaker(TileNorm,pix_just_write)
- TileFlipMaker(TileFlip,pix_just_write)
- #endif
- #ifndef _ASM_DRAW_C
- // draw a sprite pixel, process operator colors
- #define pix_sh(x) \
- if (!t); \
- else if (t==0xe) pd[x]=(pd[x]&0x3f)|0x80; /* hilight */ \
- else if (t==0xf) pd[x]= pd[x] |0xc0; /* shadow */ \
- else pd[x]=pal|t
- TileNormMaker(TileNormSH, pix_sh)
- TileFlipMaker(TileFlipSH, pix_sh)
- // draw a sprite pixel ignoring operator colors
- #define pix_sh_noop(x) \
- if (t && t < 0xe) \
- pd[x]=pal|t
- TileNormMaker(TileNormSH_noop, pix_sh_noop)
- TileFlipMaker(TileFlipSH_noop, pix_sh_noop)
- // process operator pixels only, apply only on low pri tiles
- #define pix_sh_onlyop(x) \
- if (t==0xe && (pd[x]&0x40)) pd[x]=(pd[x]&0x3f)|0x80; /* hilight */ \
- else if (t==0xf && (pd[x]&0x40)) pd[x]= pd[x] |0xc0; /* shadow */
- TileNormMaker(TileNormSH_onlyop_lp, pix_sh_onlyop)
- TileFlipMaker(TileFlipSH_onlyop_lp, pix_sh_onlyop)
- #endif
- // draw a sprite pixel (AS)
- #define pix_as(x) \
- if (t && !(pd[x]&0x80)) pd[x]=pal|t
- TileNormMaker(TileNormAS, pix_as)
- TileFlipMaker(TileFlipAS, pix_as)
- // draw a sprite pixel, skip operator colors (AS)
- #define pix_sh_as_noop(x) \
- if (t && t < 0xe && !(pd[x]&0x80)) pd[x]=pal|t
- TileNormMaker(TileNormAS_noop, pix_sh_as_noop)
- TileFlipMaker(TileFlipAS_noop, pix_sh_as_noop)
- // mark pixel as sprite pixel (AS)
- #define pix_sh_as_onlymark(x) \
- if (t) pd[x]|=0x80
- TileNormMaker(TileNormAS_onlymark, pix_sh_as_onlymark)
- TileFlipMaker(TileFlipAS_onlymark, pix_sh_as_onlymark)
- // --------------------------------------------
- #ifndef _ASM_DRAW_C
- static void DrawStrip(struct TileStrip *ts, int plane_sh, int cellskip)
- {
- int tilex,dx,ty,code=0,addr=0,cells;
- int oldcode=-1,blank=-1; // The tile we know is blank
- int pal=0,sh;
- // Draw tiles across screen:
- sh=(plane_sh<<5)&0x40;
- tilex=((-ts->hscroll)>>3)+cellskip;
- ty=(ts->line&7)<<1; // Y-Offset into tile
- dx=((ts->hscroll-1)&7)+1;
- cells = ts->cells - cellskip;
- if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
- dx+=cellskip<<3;
- for (; cells > 0; dx+=8,tilex++,cells--)
- {
- int zero=0;
- code=Pico.vram[ts->nametab+(tilex&ts->xmask)];
- if (code==blank) continue;
- if (code>>15) { // high priority tile
- int cval = code | (dx<<16) | (ty<<25);
- if(code&0x1000) cval^=7<<26;
- *ts->hc++ = cval; // cache it
- continue;
- }
- if (code!=oldcode) {
- oldcode = code;
- // Get tile address/2:
- addr=(code&0x7ff)<<4;
- addr+=ty;
- if (code&0x1000) addr^=0xe; // Y-flip
- pal=((code>>9)&0x30)|sh;
- }
- if (code&0x0800) zero=TileFlip(dx,addr,pal);
- else zero=TileNorm(dx,addr,pal);
- if (zero) blank=code; // We know this tile is blank now
- }
- // terminate the cache list
- *ts->hc = 0;
- // if oldcode wasn't changed, it means all layer is hi priority
- if (oldcode == -1) rendstatus |= PDRAW_PLANE_HI_PRIO;
- }
- // this is messy
- void DrawStripVSRam(struct TileStrip *ts, int plane_sh, int cellskip)
- {
- int tilex,dx,code=0,addr=0,cell=0;
- int oldcode=-1,blank=-1; // The tile we know is blank
- int pal=0,scan=DrawScanline;
- // Draw tiles across screen:
- tilex=(-ts->hscroll)>>3;
- dx=((ts->hscroll-1)&7)+1;
- if(dx != 8) cell--; // have hscroll, start with negative cell
- cell+=cellskip;
- tilex+=cellskip;
- dx+=cellskip<<3;
- for (; cell < ts->cells; dx+=8,tilex++,cell++)
- {
- int zero=0,nametabadd,ty;
- //if((cell&1)==0)
- {
- int line,vscroll;
- vscroll=Pico.vsram[(plane_sh&1)+(cell&~1)];
- // Find the line in the name table
- line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..
- nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]
- ty=(line&7)<<1; // Y-Offset into tile
- }
- code=Pico.vram[ts->nametab+nametabadd+(tilex&ts->xmask)];
- if (code==blank) continue;
- if (code>>15) { // high priority tile
- int cval = code | (dx<<16) | (ty<<25);
- if(code&0x1000) cval^=7<<26;
- *ts->hc++ = cval; // cache it
- continue;
- }
- if (code!=oldcode) {
- oldcode = code;
- // Get tile address/2:
- addr=(code&0x7ff)<<4;
- if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
- pal=((code>>9)&0x30)|((plane_sh<<5)&0x40);
- }
- if (code&0x0800) zero=TileFlip(dx,addr,pal);
- else zero=TileNorm(dx,addr,pal);
- if (zero) blank=code; // We know this tile is blank now
- }
- // terminate the cache list
- *ts->hc = 0;
- if (oldcode == -1) rendstatus |= PDRAW_PLANE_HI_PRIO;
- }
- #endif
- #ifndef _ASM_DRAW_C
- static
- #endif
- void DrawStripInterlace(struct TileStrip *ts)
- {
- int tilex=0,dx=0,ty=0,code=0,addr=0,cells;
- int oldcode=-1,blank=-1; // The tile we know is blank
- int pal=0;
- // Draw tiles across screen:
- tilex=(-ts->hscroll)>>3;
- ty=(ts->line&15)<<1; // Y-Offset into tile
- dx=((ts->hscroll-1)&7)+1;
- cells = ts->cells;
- if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
- for (; cells; dx+=8,tilex++,cells--)
- {
- int zero=0;
- code=Pico.vram[ts->nametab+(tilex&ts->xmask)];
- if (code==blank) continue;
- if (code>>15) { // high priority tile
- int cval = (code&0xfc00) | (dx<<16) | (ty<<25);
- cval|=(code&0x3ff)<<1;
- if(code&0x1000) cval^=0xf<<26;
- *ts->hc++ = cval; // cache it
- continue;
- }
- if (code!=oldcode) {
- oldcode = code;
- // Get tile address/2:
- addr=(code&0x7ff)<<5;
- if (code&0x1000) addr+=30-ty; else addr+=ty; // Y-flip
- // pal=Pico.cram+((code>>9)&0x30);
- pal=((code>>9)&0x30);
- }
- if (code&0x0800) zero=TileFlip(dx,addr,pal);
- else zero=TileNorm(dx,addr,pal);
- if (zero) blank=code; // We know this tile is blank now
- }
- // terminate the cache list
- *ts->hc = 0;
- }
- // --------------------------------------------
- #ifndef _ASM_DRAW_C
- static void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells)
- {
- struct PicoVideo *pvid=&Pico.video;
- const char shift[4]={5,6,5,7}; // 32,64 or 128 sized tilemaps (2 is invalid)
- struct TileStrip ts;
- int width, height, ymask;
- int vscroll, htab;
- ts.hc=hcache;
- ts.cells=maxcells;
- // Work out the TileStrip to draw
- // Work out the name table size: 32 64 or 128 tiles (0-3)
- width=pvid->reg[16];
- height=(width>>4)&3; width&=3;
- ts.xmask=(1<<shift[width])-1; // X Mask in tiles (0x1f-0x7f)
- ymask=(height<<8)|0xff; // Y Mask in pixels
- if(width == 1) ymask&=0x1ff;
- else if(width>1) ymask =0x0ff;
- // Find name table:
- if (plane_sh&1) ts.nametab=(pvid->reg[4]&0x07)<<12; // B
- else ts.nametab=(pvid->reg[2]&0x38)<< 9; // A
- htab=pvid->reg[13]<<9; // Horizontal scroll table address
- if ( pvid->reg[11]&2) htab+=DrawScanline<<1; // Offset by line
- if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile
- htab+=plane_sh&1; // A or B
- // Get horizontal scroll value, will be masked later
- ts.hscroll=Pico.vram[htab&0x7fff];
- if((pvid->reg[12]&6) == 6) {
- // interlace mode 2
- vscroll=Pico.vsram[plane_sh&1]; // Get vertical scroll value
- // Find the line in the name table
- ts.line=(vscroll+(DrawScanline<<1))&((ymask<<1)|1);
- ts.nametab+=(ts.line>>4)<<shift[width];
- DrawStripInterlace(&ts);
- } else if( pvid->reg[11]&4) {
- // shit, we have 2-cell column based vscroll
- // luckily this doesn't happen too often
- ts.line=ymask|(shift[width]<<24); // save some stuff instead of line
- DrawStripVSRam(&ts, plane_sh, cellskip);
- } else {
- vscroll=Pico.vsram[plane_sh&1]; // Get vertical scroll value
- // Find the line in the name table
- ts.line=(vscroll+DrawScanline)&ymask;
- ts.nametab+=(ts.line>>3)<<shift[width];
- DrawStrip(&ts, plane_sh, cellskip);
- }
- }
- // --------------------------------------------
- // tstart & tend are tile pair numbers
- static void DrawWindow(int tstart, int tend, int prio, int sh) // int *hcache
- {
- struct PicoVideo *pvid=&Pico.video;
- int tilex,ty,nametab,code=0;
- int blank=-1; // The tile we know is blank
- // Find name table line:
- if (pvid->reg[12]&1)
- {
- nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode
- nametab+=(DrawScanline>>3)<<6;
- }
- else
- {
- nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode
- nametab+=(DrawScanline>>3)<<5;
- }
- tilex=tstart<<1;
- if (!(rendstatus & PDRAW_WND_DIFF_PRIO)) {
- // check the first tile code
- code=Pico.vram[nametab+tilex];
- // if the whole window uses same priority (what is often the case), we may be able to skip this field
- if ((code>>15) != prio) return;
- }
- tend<<=1;
- ty=(DrawScanline&7)<<1; // Y-Offset into tile
- // Draw tiles across screen:
- if (!sh)
- {
- for (; tilex < tend; tilex++)
- {
- int addr=0,zero=0;
- int pal;
- code=Pico.vram[nametab+tilex];
- if (code==blank) continue;
- if ((code>>15) != prio) {
- rendstatus |= PDRAW_WND_DIFF_PRIO;
- continue;
- }
- pal=((code>>9)&0x30);
- // Get tile address/2:
- addr=(code&0x7ff)<<4;
- if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
- if (code&0x0800) zero=TileFlip(8+(tilex<<3),addr,pal);
- else zero=TileNorm(8+(tilex<<3),addr,pal);
- if (zero) blank=code; // We know this tile is blank now
- }
- }
- else
- {
- for (; tilex < tend; tilex++)
- {
- int addr=0,zero=0;
- int pal;
- code=Pico.vram[nametab+tilex];
- if(code==blank) continue;
- if((code>>15) != prio) {
- rendstatus |= PDRAW_WND_DIFF_PRIO;
- continue;
- }
- pal=((code>>9)&0x30);
- if (prio) {
- int *zb = (int *)(HighCol+8+(tilex<<3));
- *zb++ &= 0x3f3f3f3f;
- *zb &= 0x3f3f3f3f;
- } else {
- pal |= 0x40;
- }
- // Get tile address/2:
- addr=(code&0x7ff)<<4;
- if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
- if (code&0x0800) zero=TileFlip(8+(tilex<<3),addr,pal);
- else zero=TileNorm(8+(tilex<<3),addr,pal);
- if (zero) blank=code; // We know this tile is blank now
- }
- }
- }
- // --------------------------------------------
- static void DrawTilesFromCacheShPrep(void)
- {
- // as some layer has covered whole line with hi priority tiles,
- // we can process whole line and then act as if sh/hi mode was off.
- int c = 320/4, *zb = (int *)(HighCol+8);
- rendstatus |= PDRAW_SHHI_DONE;
- while (c--)
- {
- *zb++ &= 0x3f3f3f3f;
- }
- }
- static void DrawTilesFromCache(int *hc, int sh, int rlim)
- {
- int code, addr, dx;
- int pal;
- // *ts->hc++ = code | (dx<<16) | (ty<<25); // cache it
- if (sh && (rendstatus & (PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO)))
- {
- if (!(rendstatus & PDRAW_SHHI_DONE))
- DrawTilesFromCacheShPrep();
- sh = 0;
- }
- if (!sh)
- {
- short blank=-1; // The tile we know is blank
- while ((code=*hc++)) {
- int zero;
- if((short)code == blank) continue;
- // Get tile address/2:
- addr=(code&0x7ff)<<4;
- addr+=(unsigned int)code>>25; // y offset into tile
- dx=(code>>16)&0x1ff;
- pal=((code>>9)&0x30);
- if (rlim-dx < 0) goto last_cut_tile;
- if (code&0x0800) zero=TileFlip(dx,addr,pal);
- else zero=TileNorm(dx,addr,pal);
- if (zero) blank=(short)code;
- }
- }
- else
- {
- while ((code=*hc++)) {
- unsigned char *zb;
- // Get tile address/2:
- addr=(code&0x7ff)<<4;
- addr+=(unsigned int)code>>25; // y offset into tile
- dx=(code>>16)&0x1ff;
- zb = HighCol+dx;
- *zb++ &= 0x3f; *zb++ &= 0x3f; *zb++ &= 0x3f; *zb++ &= 0x3f;
- *zb++ &= 0x3f; *zb++ &= 0x3f; *zb++ &= 0x3f; *zb++ &= 0x3f;
- pal=((code>>9)&0x30);
- if (rlim-dx < 0) goto last_cut_tile;
- if (code&0x0800) TileFlip(dx,addr,pal);
- else TileNorm(dx,addr,pal);
- }
- }
- return;
- last_cut_tile:
- {
- unsigned int t, pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
- unsigned char *pd = HighCol+dx;
- if (!pack) return;
- if (code&0x0800)
- {
- switch (rlim-dx+8)
- {
- case 7: t=pack&0x00000f00; if (t) pd[6]=(unsigned char)(pal|(t>> 8)); // "break" is left out intentionally
- case 6: t=pack&0x000000f0; if (t) pd[5]=(unsigned char)(pal|(t>> 4));
- case 5: t=pack&0x0000000f; if (t) pd[4]=(unsigned char)(pal|(t ));
- case 4: t=pack&0xf0000000; if (t) pd[3]=(unsigned char)(pal|(t>>28));
- case 3: t=pack&0x0f000000; if (t) pd[2]=(unsigned char)(pal|(t>>24));
- case 2: t=pack&0x00f00000; if (t) pd[1]=(unsigned char)(pal|(t>>20));
- case 1: t=pack&0x000f0000; if (t) pd[0]=(unsigned char)(pal|(t>>16));
- default: break;
- }
- }
- else
- {
- switch (rlim-dx+8)
- {
- case 7: t=pack&0x00f00000; if (t) pd[6]=(unsigned char)(pal|(t>>20));
- case 6: t=pack&0x0f000000; if (t) pd[5]=(unsigned char)(pal|(t>>24));
- case 5: t=pack&0xf0000000; if (t) pd[4]=(unsigned char)(pal|(t>>28));
- case 4: t=pack&0x0000000f; if (t) pd[3]=(unsigned char)(pal|(t ));
- case 3: t=pack&0x000000f0; if (t) pd[2]=(unsigned char)(pal|(t>> 4));
- case 2: t=pack&0x00000f00; if (t) pd[1]=(unsigned char)(pal|(t>> 8));
- case 1: t=pack&0x0000f000; if (t) pd[0]=(unsigned char)(pal|(t>>12));
- default: break;
- }
- }
- }
- }
- // --------------------------------------------
- // Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size
- // Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
- static void DrawSprite(int *sprite, int sh)
- {
- int width=0,height=0;
- int row=0,code=0;
- int pal;
- int tile=0,delta=0;
- int sx, sy;
- int (*fTileFunc)(int sx,int addr,int pal);
- // parse the sprite data
- sy=sprite[0];
- code=sprite[1];
- sx=code>>16; // X
- width=sy>>28;
- height=(sy>>24)&7; // Width and height in tiles
- sy=(sy<<16)>>16; // Y
- row=DrawScanline-sy; // Row of the sprite we are on
- if (code&0x1000) row=(height<<3)-1-row; // Flip Y
- tile=code + (row>>3); // Tile number increases going down
- delta=height; // Delta to increase tile by going right
- if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
- tile &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
- delta<<=4; // Delta of address
- pal=(code>>9)&0x30;
- pal|=sh<<6;
- if (sh && (code&0x6000) == 0x6000) {
- if(code&0x0800) fTileFunc=TileFlipSH_noop;
- else fTileFunc=TileNormSH_noop;
- } else {
- if(code&0x0800) fTileFunc=TileFlip;
- else fTileFunc=TileNorm;
- }
- for (; width; width--,sx+=8,tile+=delta)
- {
- if(sx<=0) continue;
- if(sx>=328) break; // Offscreen
- tile&=0x7fff; // Clip tile address
- fTileFunc(sx,tile,pal);
- }
- }
- #endif
- static void DrawSpriteInterlace(unsigned int *sprite)
- {
- int width=0,height=0;
- int row=0,code=0;
- int pal;
- int tile=0,delta=0;
- int sx, sy;
- // parse the sprite data
- sy=sprite[0];
- height=sy>>24;
- sy=(sy&0x3ff)-0x100; // Y
- width=(height>>2)&3; height&=3;
- width++; height++; // Width and height in tiles
- row=(DrawScanline<<1)-sy; // Row of the sprite we are on
- code=sprite[1];
- sx=((code>>16)&0x1ff)-0x78; // X
- if (code&0x1000) row^=(16<<height)-1; // Flip Y
- tile=code&0x3ff; // Tile number
- tile+=row>>4; // Tile number increases going down
- delta=height; // Delta to increase tile by going right
- if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
- tile<<=5; tile+=(row&15)<<1; // Tile address
- delta<<=5; // Delta of address
- pal=((code>>9)&0x30); // Get palette pointer
- for (; width; width--,sx+=8,tile+=delta)
- {
- if(sx<=0) continue;
- if(sx>=328) break; // Offscreen
- tile&=0x7fff; // Clip tile address
- if (code&0x0800) TileFlip(sx,tile,pal);
- else TileNorm(sx,tile,pal);
- }
- }
- static void DrawAllSpritesInterlace(int pri, int sh)
- {
- struct PicoVideo *pvid=&Pico.video;
- int i,u,table,link=0,sline=DrawScanline<<1;
- unsigned int *sprites[80]; // Sprite index
- table=pvid->reg[5]&0x7f;
- if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
- table<<=8; // Get sprite table address/2
- for (i=u=0; u < 80 && i < 21; u++)
- {
- unsigned int *sprite;
- int code, sx, sy, height;
- sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
- // get sprite info
- code = sprite[0];
- sx = sprite[1];
- if(((sx>>15)&1) != pri) goto nextsprite; // wrong priority sprite
- // check if it is on this line
- sy = (code&0x3ff)-0x100;
- height = (((code>>24)&3)+1)<<4;
- if(sline < sy || sline >= sy+height) goto nextsprite; // no
- // check if sprite is not hidden offscreen
- sx = (sx>>16)&0x1ff;
- sx -= 0x78; // Get X coordinate + 8
- if(sx <= -8*3 || sx >= 328) goto nextsprite;
- // sprite is good, save it's pointer
- sprites[i++]=sprite;
- nextsprite:
- // Find next sprite
- link=(code>>16)&0x7f;
- if(!link) break; // End of sprites
- }
- // Go through sprites backwards:
- for (i-- ;i>=0; i--)
- DrawSpriteInterlace(sprites[i]);
- }
- #ifndef _ASM_DRAW_C
- // Index + 0 : hhhhvvvv ----hhvv yyyyyyyy yyyyyyyy // v, h: vert./horiz. size
- // Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
- static void DrawSpritesSHi(unsigned char *sprited)
- {
- int (*fTileFunc)(int sx,int addr,int pal);
- unsigned char *p;
- int cnt;
- cnt = sprited[0] & 0x7f;
- if (cnt == 0) return;
- p = &sprited[3];
- // Go through sprites backwards:
- for (cnt--; cnt >= 0; cnt--)
- {
- int *sprite, code, pal, tile, sx, sy;
- int offs, delta, width, height, row;
- offs = (p[cnt] & 0x7f) * 2;
- sprite = HighPreSpr + offs;
- code = sprite[1];
- pal = (code>>9)&0x30;
- if (pal == 0x30)
- {
- if (code & 0x8000) // hi priority
- {
- if (code&0x800) fTileFunc=TileFlipSH;
- else fTileFunc=TileNormSH;
- } else {
- if (code&0x800) fTileFunc=TileFlipSH_onlyop_lp;
- else fTileFunc=TileNormSH_onlyop_lp;
- }
- } else {
- if (!(code & 0x8000)) continue; // non-operator low sprite, already drawn
- if (code&0x800) fTileFunc=TileFlip;
- else fTileFunc=TileNorm;
- }
- // parse remaining sprite data
- sy=sprite[0];
- sx=code>>16; // X
- width=sy>>28;
- height=(sy>>24)&7; // Width and height in tiles
- sy=(sy<<16)>>16; // Y
- row=DrawScanline-sy; // Row of the sprite we are on
- if (code&0x1000) row=(height<<3)-1-row; // Flip Y
- tile=code + (row>>3); // Tile number increases going down
- delta=height; // Delta to increase tile by going right
- if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
- tile &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
- delta<<=4; // Delta of address
- for (; width; width--,sx+=8,tile+=delta)
- {
- if(sx<=0) continue;
- if(sx>=328) break; // Offscreen
- tile&=0x7fff; // Clip tile address
- fTileFunc(sx,tile,pal);
- }
- }
- }
- #endif
- static void DrawSpritesHiAS(unsigned char *sprited, int sh)
- {
- int (*fTileFunc)(int sx,int addr,int pal);
- unsigned char *p;
- int entry, cnt, sh_cnt = 0;
- cnt = sprited[0] & 0x7f;
- if (cnt == 0) return;
- p = &sprited[3];
- // Go through sprites:
- for (entry = 0; entry < cnt; entry++)
- {
- int *sprite, code, pal, tile, sx, sy;
- int offs, delta, width, height, row;
- offs = (p[entry] & 0x7f) * 2;
- sprite = HighPreSpr + offs;
- code = sprite[1];
- pal = (code>>9)&0x30;
- if (code & 0x8000) // hi priority
- {
- if (sh && pal == 0x30)
- {
- if (code&0x800) fTileFunc=TileFlipAS_noop;
- else fTileFunc=TileNormAS_noop;
- } else {
- if (code&0x800) fTileFunc=TileFlipAS;
- else fTileFunc=TileNormAS;
- }
- } else {
- if (code&0x800) fTileFunc=TileFlipAS_onlymark;
- else fTileFunc=TileNormAS_onlymark;
- }
- if (sh && pal == 0x30)
- p[sh_cnt++] = offs / 2; // re-save for sh/hi pass
- // parse remaining sprite data
- sy=sprite[0];
- sx=code>>16; // X
- width=sy>>28;
- height=(sy>>24)&7; // Width and height in tiles
- sy=(sy<<16)>>16; // Y
- row=DrawScanline-sy; // Row of the sprite we are on
- if (code&0x1000) row=(height<<3)-1-row; // Flip Y
- tile=code + (row>>3); // Tile number increases going down
- delta=height; // Delta to increase tile by going right
- if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
- tile &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
- delta<<=4; // Delta of address
- pal |= 0x80;
- for (; width; width--,sx+=8,tile+=delta)
- {
- if(sx<=0) continue;
- if(sx>=328) break; // Offscreen
- tile&=0x7fff; // Clip tile address
- fTileFunc(sx,tile,pal);
- }
- }
- if (!sh || !(sprited[1]&SPRL_MAY_HAVE_OP)) return;
- /* nasty 1: remove 'sprite' flags */
- {
- int c = 320/4, *zb = (int *)(HighCol+8);
- while (c--)
- {
- *zb++ &= 0x7f7f7f7f;
- }
- }
- /* nasty 2: sh operator pass */
- sprited[0] = sh_cnt;
- DrawSpritesSHi(sprited);
- }
- // Index + 0 : ----hhvv -lllllll -------y yyyyyyyy
- // Index + 4 : -------x xxxxxxxx pccvhnnn nnnnnnnn
- // v
- // Index + 0 : hhhhvvvv ----hhvv yyyyyyyy yyyyyyyy // v, h: vert./horiz. size
- // Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
- void PrepareSprites(int full)
- {
- struct PicoVideo *pvid=&Pico.video;
- int u,link=0,sh;
- int table=0;
- int *pd = HighPreSpr;
- int max_lines = 224, max_sprites = 80, max_width = 328;
- int max_line_sprites = 20; // 20 sprites, 40 tiles
- if (!(Pico.video.reg[12]&1))
- max_sprites = 64, max_line_sprites = 16, max_width = 264;
- if (PicoOpt & POPT_DIS_SPRITE_LIM)
- max_line_sprites = MAX_LINE_SPRITES;
- if (pvid->reg[1]&8) max_lines = 240;
- sh = Pico.video.reg[0xC]&8; // shadow/hilight?
- table=pvid->reg[5]&0x7f;
- if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
- table<<=8; // Get sprite table address/2
- if (!full)
- {
- int pack;
- // updates: tilecode, sx
- for (u=0; u < max_sprites && (pack = *pd); u++, pd+=2)
- {
- unsigned int *sprite;
- int code2, sx, sy, height;
- sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
- // parse sprite info
- code2 = sprite[1];
- sx = (code2>>16)&0x1ff;
- sx -= 0x78; // Get X coordinate + 8
- sy = (pack << 16) >> 16;
- height = (pack >> 24) & 0xf;
- if (sy < max_lines && sy + (height<<3) > DrawScanline && // sprite onscreen (y)?
- (sx > -24 || sx < max_width)) // onscreen x
- {
- int y = (sy >= DrawScanline) ? sy : DrawScanline;
- int entry = ((pd - HighPreSpr) / 2) | ((code2>>8)&0x80);
- for (; y < sy + (height<<3) && y < max_lines; y++)
- {
- int i, cnt;
- cnt = HighLnSpr[y][0] & 0x7f;
- if (cnt >= max_line_sprites) continue; // sprite limit?
- for (i = 0; i < cnt; i++)
- if (((HighLnSpr[y][3+i] ^ entry) & 0x7f) == 0) goto found;
- // this sprite was previously missing
- HighLnSpr[y][3+cnt] = entry;
- HighLnSpr[y][0] = cnt + 1;
- found:;
- if (entry & 0x80)
- HighLnSpr[y][1] |= SPRL_HAVE_HI;
- else HighLnSpr[y][1] |= SPRL_HAVE_LO;
- }
- }
- code2 &= ~0xfe000000;
- code2 -= 0x00780000; // Get X coordinate + 8 in upper 16 bits
- pd[1] = code2;
- // Find next sprite
- link=(sprite[0]>>16)&0x7f;
- if (!link) break; // End of sprites
- }
- }
- else
- {
- for (u = 0; u < max_lines; u++)
- *((int *)&HighLnSpr[u][0]) = 0;
- for (u = 0; u < max_sprites; u++)
- {
- unsigned int *sprite;
- int code, code2, sx, sy, hv, height, width;
- sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
- // parse sprite info
- code = sprite[0];
- sy = (code&0x1ff)-0x80;
- hv = (code>>24)&0xf;
- height = (hv&3)+1;
- width = (hv>>2)+1;
- code2 = sprite[1];
- sx = (code2>>16)&0x1ff;
- sx -= 0x78; // Get X coordinate + 8
- if (sy < max_lines && sy + (height<<3) > DrawScanline) // sprite onscreen (y)?
- {
- int entry, y, sx_min, onscr_x, maybe_op = 0;
- sx_min = 8-(width<<3);
- onscr_x = sx_min < sx && sx < max_width;
- if (sh && (code2 & 0x6000) == 0x6000)
- maybe_op = SPRL_MAY_HAVE_OP;
- entry = ((pd - HighPreSpr) / 2) | ((code2>>8)&0x80);
- y = (sy >= DrawScanline) ? sy : DrawScanline;
- for (; y < sy + (height<<3) && y < max_lines; y++)
- {
- unsigned char *p = &HighLnSpr[y][0];
- int cnt = p[0];
- if (cnt >= max_line_sprites) continue; // sprite limit?
- if (p[2] >= max_line_sprites*2) { // tile limit?
- p[0] |= 0x80;
- continue;
- }
- p[2] += width;
- if (sx == -0x78) {
- if (cnt > 0)
- p[0] |= 0x80; // masked, no more sprites for this line
- continue;
- }
- // must keep the first sprite even if it's offscreen, for masking
- if (cnt > 0 && !onscr_x) continue; // offscreen x
- p[3+cnt] = entry;
- p[0] = cnt + 1;
- p[1] |= (entry & 0x80) ? SPRL_HAVE_HI : SPRL_HAVE_LO;
- p[1] |= maybe_op; // there might be op sprites on this line
- if (cnt > 0 && (code2 & 0x8000) && !(p[3+cnt-1]&0x80))
- p[1] |= SPRL_LO_ABOVE_HI;
- }
- }
- *pd++ = (width<<28)|(height<<24)|(hv<<16)|((unsigned short)sy);
- *pd++ = (sx<<16)|((unsigned short)code2);
- // Find next sprite
- link=(code>>16)&0x7f;
- if (!link) break; // End of sprites
- }
- *pd = 0;
- #if 0
- for (u = 0; u < max_lines; u++)
- {
- int y;
- printf("c%03i: %2i, %2i: ", u, HighLnSpr[u][0] & 0x7f, HighLnSpr[u][2]);
- for (y = 0; y < HighLnSpr[u][0] & 0x7f; y++)
- printf(" %i", HighLnSpr[u][y+3]);
- printf("\n");
- }
- #endif
- }
- }
- #ifndef _ASM_DRAW_C
- static void DrawAllSprites(unsigned char *sprited, int prio, int sh)
- {
- int rs = rendstatus;
- unsigned char *p;
- int cnt;
- if (rs & (PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES)) {
- //elprintf(EL_STATUS, "PrepareSprites(%i)", (rs>>4)&1);
- PrepareSprites(rs & PDRAW_DIRTY_SPRITES);
- rendstatus = rs & ~(PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES);
- }
- cnt = sprited[0] & 0x7f;
- if (cnt == 0) return;
- p = &sprited[3];
- // Go through sprites backwards:
- for (cnt--; cnt >= 0; cnt--)
- {
- int offs;
- if ((p[cnt] >> 7) != prio) continue;
- offs = (p[cnt]&0x7f) * 2;
- DrawSprite(HighPreSpr + offs, sh);
- }
- }
- // --------------------------------------------
- static void BackFill(int reg7, int sh)
- {
- unsigned int back;
- // Start with a blank scanline (background colour):
- back=reg7&0x3f;
- back|=sh<<6;
- back|=back<<8;
- back|=back<<16;
- memset32((int *)(HighCol+8), back, 320/4);
- }
- #endif
- // --------------------------------------------
- unsigned short HighPal[0x100];
- #ifndef _ASM_DRAW_C
- void PicoDoHighPal555(int sh)
- {
- unsigned short *pal=HighPal;
- int i, t;
- Pico.m.dirtyPal = 0;
- {
- unsigned int *spal=(void *)Pico.cram;
- unsigned int *dpal=(void *)HighPal;
- for (i = 0x3f/2; i >= 0; i--)
- #ifdef USE_BGR555
- dpal[i] = ((spal[i]&0x000f000f)<< 1)|((spal[i]&0x00f000f0)<<3)|((spal[i]&0x0f000f00)<<4);
- #else
- dpal[i] = ((spal[i]&0x000f000f)<<12)|((spal[i]&0x00f000f0)<<3)|((spal[i]&0x0f000f00)>>7);
- #endif
- }
- if (sh)
- {
- // shadowed pixels
- for (i = 0x3f; i >= 0; i--)
- pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x738e);
- // hilighted pixels
- for (i = 0x3f; i >= 0; i--) {
- t=pal[i]&0xe71c;t+=0x4208;if(t&0x20)t|=0x1c;if(t&0x800)t|=0x700;if(t&0x10000)t|=0xe000;t&=0xe71c;
- pal[0x80|i]=(unsigned short)t;
- }
- }
- }
- static void FinalizeLineBGR444(int sh)
- {
- unsigned short *pd=DrawLineDest;
- unsigned char *ps=HighCol+8;
- unsigned short *pal=Pico.cram;
- int len, i, t, mask=0xff;
- if (Pico.video.reg[12]&1) {
- len = 320;
- } else {
- if(!(PicoOpt&POPT_DIS_32C_BORDER)) pd+=32;
- len = 256;
- }
- if(sh) {
- pal=HighPal;
- if(Pico.m.dirtyPal) {
- blockcpy(pal, Pico.cram, 0x40*2);
- // shadowed pixels
- for(i = 0x3f; i >= 0; i--)
- pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x0777);
- // hilighted pixels
- for(i = 0x3f; i >= 0; i--) {
- t=pal[i]&0xeee;t+=0x444;if(t&0x10)t|=0xe;if(t&0x100)t|=0xe0;if(t&0x1000)t|=0xe00;t&=0xeee;
- pal[0x80|i]=(unsigned short)t;
- }
- Pico.m.dirtyPal = 0;
- }
- }
- if (!sh && (rendstatus & PDRAW_ACC_SPRITES))
- mask=0x3f; // accurate sprites
- for(i = 0; i < len; i++)
- pd[i] = pal[ps[i] & mask];
- }
- static void FinalizeLineRGB555(int sh)
- {
- unsigned short *pd=DrawLineDest;
- unsigned char *ps=HighCol+8;
- unsigned short *pal=HighPal;
- int len;
- if (Pico.m.dirtyPal)
- PicoDoHighPal555(sh);
- if (Pico.video.reg[12]&1) {
- len = 320;
- } else {
- if (!(PicoOpt&POPT_DIS_32C_BORDER)) pd+=32;
- len = 256;
- }
- {
- #ifndef PSP
- int i, mask=0xff;
- if (!sh && (rendstatus & PDRAW_ACC_SPRITES))
- mask=0x3f; // accurate sprites, upper bits are priority stuff
- for (i = 0; i < len; i++)
- pd[i] = pal[ps[i] & mask];
- #else
- extern void amips_clut(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
- extern void amips_clut_6bit(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
- if (!sh && (rendstatus & PDRAW_ACC_SPRITES))
- amips_clut_6bit(pd, ps, pal, len);
- else amips_clut(pd, ps, pal, len);
- #endif
- }
- }
- #endif
- static void FinalizeLine8bit(int sh)
- {
- unsigned char *pd=DrawLineDest;
- int len, rs = rendstatus;
- static int dirty_count;
- if (!sh && !(rs & PDRAW_ACC_SPRITES) && Pico.m.dirtyPal == 1 && DrawScanline < 222)
- {
- // a hack for mid-frame palette changes
- if (!(rs & PDRAW_SONIC_MODE))
- dirty_count = 1;
- else dirty_count++;
- rs |= PDRAW_SONIC_MODE;
- rendstatus = rs;
- if (dirty_count == 3) {
- blockcpy(HighPal, Pico.cram, 0x40*2);
- } else if (dirty_count == 11) {
- blockcpy(HighPal+0x40, Pico.cram, 0x40*2);
- }
- }
- if (Pico.video.reg[12]&1) {
- len = 320;
- } else {
- if (!(PicoOpt&POPT_DIS_32C_BORDER)) pd+=32;
- len = 256;
- }
- if (!sh && (rs & PDRAW_SONIC_MODE)) {
- if (dirty_count >= 11) {
- blockcpy_or(pd, HighCol+8, len, 0x80);
- } else {
- blockcpy_or(pd, HighCol+8, len, 0x40);
- }
- } else {
- blockcpy(pd, HighCol+8, len);
- }
- }
- static void (*FinalizeLine)(int sh) = FinalizeLineBGR444;
- // --------------------------------------------
- static void DrawBlankedLine(void)
- {
- int sh=(Pico.video.reg[0xC]&8)>>3; // shadow/hilight?
- if (PicoScanBegin != NULL)
- PicoScanBegin(DrawScanline);
- BackFill(Pico.video.reg[7], sh);
- if (FinalizeLine != NULL)
- FinalizeLine(sh);
- if (PicoScanEnd != NULL)
- PicoScanEnd(DrawScanline);
- }
- static int DrawDisplay(int sh)
- {
- unsigned char *sprited = &HighLnSpr[DrawScanline][0];
- struct PicoVideo *pvid=&Pico.video;
- int win=0,edge=0,hvwind=0;
- int maxw,maxcells;
- rendstatus &= ~(PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO);
- if (pvid->reg[12]&1) {
- maxw = 328; maxcells = 40;
- } else {
- maxw = 264; maxcells = 32;
- }
- // Find out if the window is on this line:
- win=pvid->reg[0x12];
- edge=(win&0x1f)<<3;
- if (win&0x80) { if (DrawScanline>=edge) hvwind=1; }
- else { if (DrawScanline< edge) hvwind=1; }
- if (!hvwind) // we might have a vertical window here
- {
- win=pvid->reg[0x11];
- edge=win&0x1f;
- if (win&0x80) {
- if (!edge) hvwind=1;
- else if(edge < (maxcells>>1)) hvwind=2;
- } else {
- if (!edge);
- else if(edge < (maxcells>>1)) hvwind=2;
- else hvwind=1;
- }
- }
- /* - layer B low - */
- if (PicoDrawMask & PDRAW_LAYERB_ON)
- DrawLayer(1|(sh<<1), HighCacheB, 0, maxcells);
- /* - layer A low - */
- if (!(PicoDrawMask & PDRAW_LAYERA_ON));
- else if (hvwind == 1)
- DrawWindow(0, maxcells>>1, 0, sh);
- else if (hvwind == 2) {
- DrawLayer(0|(sh<<1), HighCacheA, (win&0x80) ? 0 : edge<<1, (win&0x80) ? edge<<1 : maxcells);
- DrawWindow( (win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 0, sh);
- } else
- DrawLayer(0|(sh<<1), HighCacheA, 0, maxcells);
- /* - sprites low - */
- if (!(PicoDrawMask & PDRAW_SPRITES_LOW_ON));
- else if (rendstatus & PDRAW_INTERLACE)
- DrawAllSpritesInterlace(0, sh);
- else if (sprited[1] & SPRL_HAVE_LO)
- DrawAllSprites(sprited, 0, sh);
- /* - layer B hi - */
- if ((PicoDrawMask & PDRAW_LAYERB_ON) && HighCacheB[0])
- DrawTilesFromCache(HighCacheB, sh, maxw);
- /* - layer A hi - */
- if (!(PicoDrawMask & PDRAW_LAYERA_ON));
- else if (hvwind == 1)
- DrawWindow(0, maxcells>>1, 1, sh);
- else if (hvwind == 2) {
- if (HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh, (win&0x80) ? edge<<4 : maxw);
- DrawWindow((win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 1, sh);
- } else
- if (HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh, maxw);
- /* - sprites hi - */
- if (!(PicoDrawMask & PDRAW_SPRITES_HI_ON));
- else if (rendstatus & PDRAW_INTERLACE)
- DrawAllSpritesInterlace(1, sh);
- // AS on and have both lo/hi sprites and lo before hi sprites?
- else if ((sprited[1] & 0xd0) == 0xd0 && (rendstatus & PDRAW_ACC_SPRITES))
- DrawSpritesHiAS(sprited, sh);
- else if (sh && (sprited[1] & SPRL_MAY_HAVE_OP))
- DrawSpritesSHi(sprited);
- else if (sprited[1] & SPRL_HAVE_HI)
- DrawAllSprites(sprited, 1, 0);
- #if 0
- {
- int *c, a, b;
- for (a = 0, c = HighCacheA; *c; c++, a++);
- for (b = 0, c = HighCacheB; *c; c++, b++);
- printf("%i:%03i: a=%i, b=%i\n", Pico.m.frame_count, DrawScanline, a, b);
- }
- #endif
- return 0;
- }
- PICO_INTERNAL void PicoFrameStart(void)
- {
- // prepare to do this frame
- rendstatus = 0;
- if (PicoOpt & POPT_ACC_SPRITES)
- rendstatus |= PDRAW_ACC_SPRITES;
- if ((Pico.video.reg[12]&6) == 6)
- rendstatus |= PDRAW_INTERLACE; // interlace mode
- if (Pico.m.dirtyPal) Pico.m.dirtyPal = 2; // reset dirty if needed
- DrawScanline=0;
- PrepareSprites(1);
- skip_next_line=0;
- }
- static void PicoLine(void)
- {
- int sh;
- if (skip_next_line>0) { skip_next_line--; return; } // skip rendering lines
- sh=(Pico.video.reg[0xC]&8)>>3; // shadow/hilight?
- if (PicoScanBegin != NULL)
- skip_next_line = PicoScanBegin(DrawScanline);
- // Draw screen:
- BackFill(Pico.video.reg[7], sh);
- if (Pico.video.reg[1]&0x40)
- DrawDisplay(sh);
- if (FinalizeLine != NULL)
- FinalizeLine(sh);
- if (PicoScanEnd != NULL)
- PicoScanEnd(DrawScanline);
- }
- void PicoDrawSync(int to, int blank_last_line)
- {
- for (; DrawScanline < to; DrawScanline++)
- {
- #if !CAN_HANDLE_240_LINES
- if (DrawScanline >= 224) break;
- #endif
- PicoLine();
- }
- #if !CAN_HANDLE_240_LINES
- if (DrawScanline >= 224) { DrawScanline = 240; return; }
- #endif
- // last line
- if (DrawScanline <= to)
- {
- if (blank_last_line)
- DrawBlankedLine();
- else PicoLine();
- DrawScanline++;
- }
- }
- void PicoDrawSetColorFormat(int which)
- {
- switch (which)
- {
- case 2: FinalizeLine = FinalizeLine8bit; break;
- case 1: FinalizeLine = FinalizeLineRGB555; break;
- case 0: FinalizeLine = FinalizeLineBGR444; break;
- default:FinalizeLine = NULL; break;
- }
- #if OVERRIDE_HIGHCOL
- if (which) HighCol=DefHighCol;
- #endif
- }
|