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- /*
- * line renderer
- * (c) Copyright Dave, 2004
- * (C) notaz, 2006-2010
- * (C) kub, 2019-2020
- *
- * This work is licensed under the terms of MAME license.
- * See COPYING file in the top-level directory.
- */
- /*
- * The renderer has 4 modes now:
- * - normal
- * - shadow/hilight (s/h)
- * - "sonic mode" for midline palette changes (8bit mode only)
- * - accurate sprites (AS) [+ s/h]
- *
- * s/h uses 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".
- *
- * since renderer always draws line in 8bit mode, there are 2 spare bits:
- * b \ mode: s/h sonic
- * 00 normal pal index
- * 01 hilight pal index
- * 10 shadow pal index
- * 11 hilight|shadow=normal pal index
- *
- * sprite s/h can only be correctly done after the plane rendering s/h state is
- * known since the s/h result changes if there's at least one high prio plane.
- * sprite op rendering is deferred until this is known, and hilight is used as
- * mark since it can't occur before sprite ops:
- * x1 op marker pal index
- *
- * low prio s/h rendering:
- * - plane and non-op sprite pixels have shadow
- * - s/h sprite op pixel rendering is marked with hilight (deferred)
- * high prio s/h rendering:
- * - plane and non-op sprite pixels are normal
- * - all s/h sprite op pixels (either marked or high prio) are rendered
- *
- * not handled properly:
- * - high prio s/h sprite op overlapping low prio sprite shows sprite, not A,B,G
- * - in debug sprite-masked, transparent high-prio sprite px don't remove shadow
- */
- #include "pico_int.h"
- #include <platform/common/upscale.h>
- #define FORCE // layer forcing via debug register?
- int (*PicoScanBegin)(unsigned int num) = NULL;
- int (*PicoScanEnd) (unsigned int num) = NULL;
- static unsigned char DefHighCol[8+320+8];
- unsigned char *HighColBase = DefHighCol;
- int HighColIncrement;
- static u16 DefOutBuff[320*2] ALIGNED(4);
- void *DrawLineDestBase = DefOutBuff;
- int DrawLineDestIncrement;
- 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)
- // NB don't change any defines without checking their usage in ASM
- #if defined(USE_BGR555)
- #define PXCONV(t) ((t & 0x000e000e)<< 1) | ((t & 0x00e000e0)<<2) | ((t & 0x0e000e00)<<3)
- #define PXMASKL 0x04210421 // 0x0c630c63, LSB for all colours
- #define PXMASKH 0x39ce39ce // 0x3def3def, all but MSB for all colours
- #elif defined(USE_BGR565)
- #define PXCONV(t) ((t & 0x000e000e)<< 1) | ((t & 0x00e000e0)<<3) | ((t & 0x0e000e00)<<4)
- #define PXMASKL 0x08610861 // 0x18e318e3
- #define PXMASKH 0x738e738e // 0x7bef7bef
- #else // RGB565
- #define PXCONV(t) ((t & 0x000e000e)<<12) | ((t & 0x00e000e0)<<3) | ((t & 0x0e000e00)>>7)
- #define PXMASKL 0x08610861 // 0x18e318e3
- #define PXMASKH 0x738e738e // 0x7bef7bef
- #endif
- #define LF_PLANE (1 << 0) // must be = 1
- #define LF_SH (1 << 1) // must be = 2
- //#define LF_FORCE (1 << 2)
- #define LF_PLANE_A 0
- #define LF_PLANE_B 1
- #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
- #define SPRL_HAVE_X 0x08 // have sprites with x != 0
- #define SPRL_TILE_OVFL 0x04 // tile limit exceeded on previous line
- #define SPRL_HAVE_MASK0 0x02 // have sprite with x == 0 in 1st slot
- #define SPRL_MASKED 0x01 // lo prio masking by sprite with x == 0 active
- unsigned char HighLnSpr[240][4+MAX_LINE_SPRITES+1]; // sprite_count, ^flags, tile_count, sprites_total, [spritep]..., last_width
- int rendstatus_old;
- int rendlines;
- static int skip_next_line=0;
- 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
- u32 *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,
- struct PicoEState *est);
- void DrawAllSprites(unsigned char *sprited, int prio, int sh,
- struct PicoEState *est);
- void DrawTilesFromCache(u32 *hc, int sh, int rlim,
- struct PicoEState *est);
- void DrawSpritesSHi(unsigned char *sprited, struct PicoEState *est);
- void DrawLayer(int plane_sh, u32 *hcache, int cellskip, int maxcells,
- struct PicoEState *est);
- 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;
- if (dst > src) {
- for (pd += n, ps += n; n; n--)
- *--pd = (unsigned char) (*--ps | pat);
- } else
- for (; n; n--)
- *pd++ = (unsigned char) (*ps++ | pat);
- }
- #define blockcpy memmove
- #endif
- #define TileNormMaker_(pix_func,ret) \
- { \
- unsigned char t; \
- \
- 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 ret; \
- }
- #define TileFlipMaker_(pix_func,ret) \
- { \
- unsigned char t; \
- \
- 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 ret; \
- }
- #define TileNormMaker(funcname, pix_func) \
- static void funcname(unsigned char *pd, unsigned int pack, unsigned char pal) \
- TileNormMaker_(pix_func,)
- #define TileFlipMaker(funcname, pix_func) \
- static void funcname(unsigned char *pd, unsigned int pack, unsigned char pal) \
- TileFlipMaker_(pix_func,)
- #define TileNormMakerAS(funcname, pix_func) \
- static unsigned funcname(unsigned m, unsigned char *pd, unsigned int pack, unsigned char pal) \
- TileNormMaker_(pix_func,m)
- #define TileFlipMakerAS(funcname, pix_func) \
- static unsigned funcname(unsigned m, unsigned char *pd, unsigned int pack, unsigned char pal) \
- TileFlipMaker_(pix_func,m)
- // draw layer or non-s/h sprite pixels (no operator colors)
- #define pix_just_write(x) \
- if (likely(t)) pd[x]=pal|t
- TileNormMaker(TileNorm, pix_just_write)
- TileFlipMaker(TileFlip, pix_just_write)
- #ifndef _ASM_DRAW_C
- // draw low prio sprite non-s/h pixels in s/h mode
- #define pix_nonsh(x) \
- if (likely(t)) { \
- pd[x]=pal|t; \
- if (unlikely(t==0xe)) pd[x]&=~0x80; /* disable shadow for color 14 (hw bug?) */ \
- }
- TileNormMaker(TileNormNonSH, pix_nonsh)
- TileFlipMaker(TileFlipNonSH, pix_nonsh)
- // draw sprite pixels, process operator colors
- #define pix_sh(x) \
- if (likely(t)) \
- pd[x]=(likely(t<0xe) ? pal|t : pd[x]|((t-1)<<6))
- TileNormMaker(TileNormSH, pix_sh)
- TileFlipMaker(TileFlipSH, pix_sh)
- // draw sprite pixels, mark but don't process operator colors
- #define pix_sh_markop(x) \
- if (likely(t)) \
- pd[x]=(likely(t<0xe) ? pal|t : pd[x]|0x40)
- TileNormMaker(TileNormSH_markop, pix_sh_markop)
- TileFlipMaker(TileFlipSH_markop, pix_sh_markop)
- #endif
- // draw low prio sprite operator pixels if visible (i.e. marked)
- #define pix_sh_onlyop(x) \
- if (unlikely(t>=0xe && (pd[x]&0x40))) \
- pd[x]=(pd[x]&~0x40)|((t-1)<<6)
- #ifndef _ASM_DRAW_C
- TileNormMaker(TileNormSH_onlyop_lp, pix_sh_onlyop)
- TileFlipMaker(TileFlipSH_onlyop_lp, pix_sh_onlyop)
- #endif
- // AS: sprite mask bits in m shifted to bits 8-15, see DrawSpritesHiAS
- // draw high prio sprite pixels (AS)
- #define pix_as(x) \
- if (likely(t && (m & (1<<(x+8))))) \
- m &= ~(1<<(x+8)), pd[x] = pal|t
- TileNormMakerAS(TileNormAS, pix_as)
- TileFlipMakerAS(TileFlipAS, pix_as)
- // draw high prio sprite pixels, process operator colors (AS)
- // NB sprite+planes: h+s->n, h+[nh]->h, s+[nhs]->s, hence mask h before op
- #define pix_sh_as(x) \
- if (likely(t && (m & (1<<(x+8))))) { \
- m &= ~(1<<(x+8)); \
- pd[x]=(likely(t<0xe) ? pal|t : (pd[x]&~0x40)|((t-1)<<6)); \
- }
- TileNormMakerAS(TileNormSH_AS, pix_sh_as)
- TileFlipMakerAS(TileFlipSH_AS, pix_sh_as)
- // draw only sprite operator pixels (AS)
- #define pix_sh_as_onlyop(x) \
- if (likely(t && (m & (1<<(x+8))))) { \
- m &= ~(1<<(x+8)); \
- pix_sh_onlyop(x); \
- }
- TileNormMakerAS(TileNormSH_AS_onlyop_lp, pix_sh_as_onlyop)
- TileFlipMakerAS(TileFlipSH_AS_onlyop_lp, pix_sh_as_onlyop)
- // mark low prio sprite pixels (AS)
- #define pix_sh_as_onlymark(x) \
- if (likely(t)) m &= ~(1<<(x+8))
- TileNormMakerAS(TileNormAS_onlymark, pix_sh_as_onlymark)
- TileFlipMakerAS(TileFlipAS_onlymark, pix_sh_as_onlymark)
- #ifdef FORCE
- // NB s/h already resolved by non-forced drawing
- // forced both layer draw (through debug reg)
- #define pix_and(x) \
- pal |= 0xc0; /* leave s/h bits untouched in pixel "and" */ \
- pd[x] &= pal|t
- TileNormMaker(TileNorm_and, pix_and)
- TileFlipMaker(TileFlip_and, pix_and)
- // forced sprite draw (through debug reg)
- #define pix_sh_as_and(x) \
- pal |= 0xc0; /* leave s/h bits untouched in pixel "and" */ \
- if (likely(m & (1<<(x+8)))) { \
- m &= ~(1<<(x+8)); \
- if (t<0xe) pd[x] &= pal|t; \
- }
-
- TileNormMakerAS(TileNormSH_AS_and, pix_sh_as_and)
- TileFlipMakerAS(TileFlipSH_AS_and, pix_sh_as_and)
- #endif
- // --------------------------------------------
- #ifndef _ASM_DRAW_C
- static void DrawStrip(struct TileStrip *ts, int lflags, int cellskip)
- {
- unsigned char *pd = Pico.est.HighCol;
- u32 *hc = ts->hc;
- int tilex, dx, ty, cells;
- u32 pack = 0, oldcode = -1, blank = -1; // The tile we know is blank
- unsigned int pal = 0, sh;
- // Draw tiles across screen:
- sh = (lflags & LF_SH) << 6; // shadow
- 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;
- // int force = (lflags&LF_FORCE) << 13;
- for (; cells > 0; dx+=8, tilex++, cells--)
- {
- u32 code = PicoMem.vram[ts->nametab + (tilex & ts->xmask)];
- // code &= ~force; // forced always draw everything
- if (code == blank && !((code & 0x8000) && sh))
- continue;
- if (code!=oldcode) {
- oldcode = code;
- pack = 0;
- if (code != blank) {
- // Get tile address/2:
- u32 addr = ((code&0x7ff)<<4) + ty;
- if (code & 0x1000) addr ^= 0xe; // Y-flip
- pal = ((code>>9)&0x30) | sh; // shadow
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + addr));
- if (!pack)
- blank = code;
- }
- }
- if (code & 0x8000) { // (un-forced) high priority tile
- code |= (dx<<16) | (ty<<25);
- if (code & 0x1000) code ^= 0xe<<25;
- *hc++ = code, *hc++ = pack; // cache it
- } else if (code != blank) {
- if (code & 0x0800) TileFlip(pd + dx, pack, pal);
- else TileNorm(pd + dx, pack, pal);
- }
- }
- // terminate the cache list
- *hc = 0;
- // if oldcode wasn't changed, it means all layer is hi priority
- if (oldcode == -1) Pico.est.rendstatus |= PDRAW_PLANE_HI_PRIO;
- }
- // this is messy
- static void DrawStripVSRam(struct TileStrip *ts, int plane_sh, int cellskip)
- {
- unsigned char *pd = Pico.est.HighCol;
- u32 *hc = ts->hc;
- int tilex, dx, ty = 0, addr = 0, cell = 0, nametabadd = 0;
- u32 oldcode = -1, blank = -1; // The tile we know is blank
- unsigned int pal = 0, scan = Pico.est.DrawScanline, sh, plane;
- // Draw tiles across screen:
- sh = (plane_sh & LF_SH) << 6; // shadow
- plane = (plane_sh & LF_PLANE); // plane to draw
- tilex=(-ts->hscroll)>>3;
- dx=((ts->hscroll-1)&7)+1;
- if (ts->hscroll & 0x0f) {
- int adj = ((ts->hscroll ^ dx) >> 3) & 1;
- cell -= adj + 1;
- ts->cells -= adj;
- PicoMem.vsram[0x3e] = PicoMem.vsram[0x3f] = plane_sh >> 16;
- }
- cell+=cellskip;
- tilex+=cellskip;
- dx+=cellskip<<3;
- // int force = (plane_sh&LF_FORCE) << 13;
- if ((cell&1)==1)
- {
- int line,vscroll;
- vscroll = PicoMem.vsram[plane + (cell&0x3e)];
- // 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
- }
- for (; cell < ts->cells; dx+=8,tilex++,cell++)
- {
- u32 code, pack;
- if ((cell&1)==0)
- {
- int line,vscroll;
- vscroll = PicoMem.vsram[plane + (cell&0x3e)];
- // 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= PicoMem.vram[ts->nametab + nametabadd + (tilex & ts->xmask)];
- // code &= ~force; // forced always draw everything
- code |= ty<<25; // add ty since that can change pixel row for every 2nd tile
- if (code == blank && !((code & 0x8000) && sh))
- continue;
- if (code!=oldcode) {
- oldcode = code;
- // Get tile address/2:
- addr = (code&0x7ff)<<4;
- pal = ((code>>9)&0x30) | sh; // shadow
- }
- pack = (code & 0x1000 ? ty^0xe : ty); // Y-flip
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + addr+pack));
- if (!pack)
- blank = code;
- if (code & 0x8000) { // (un-forced) high priority tile
- code |= (dx<<16);
- if (code & 0x1000) code ^= 0xe<<25;
- *hc++ = code, *hc++ = pack; // cache it
- } else if (code != blank) {
- if (code & 0x0800) TileFlip(pd + dx, pack, pal);
- else TileNorm(pd + dx, pack, pal);
- }
- }
- // terminate the cache list
- *hc = 0;
- if (oldcode == -1) Pico.est.rendstatus |= PDRAW_PLANE_HI_PRIO;
- }
- #endif
- #ifndef _ASM_DRAW_C
- static
- #endif
- void DrawStripInterlace(struct TileStrip *ts, int plane_sh)
- {
- unsigned char *pd = Pico.est.HighCol;
- u32 *hc = ts->hc;
- int tilex = 0, dx = 0, ty = 0, cells;
- u32 oldcode = -1, blank = -1; // The tile we know is blank
- unsigned int pal = 0, pack = 0, sh;
- // Draw tiles across screen:
- sh = (plane_sh & LF_SH) << 6; // shadow
- 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
- // int force = (plane_sh&LF_FORCE) << 13;
- for (; cells; dx+=8,tilex++,cells--)
- {
- u32 code = PicoMem.vram[ts->nametab + (tilex & ts->xmask)];
- // code &= ~force; // forced always draw everything
- if (code == blank && !(code & 0x8000))
- continue;
- if (code!=oldcode) {
- oldcode = code;
- pack = 0;
- if (code != blank) {
- // Get tile address/2:
- u32 addr = ((code&0x3ff)<<5) + ty;
- if (code & 0x1000) addr ^= 0x1e; // Y-flip
- pal = ((code>>9)&0x30) | sh; // shadow
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + addr));
- if (!pack)
- blank = code;
- }
- }
- if (code & 0x8000) { // high priority tile
- if ((plane_sh&LF_SH) | (code!=blank)) {
- code = (code&0xfc00) | ((code&0x3ff)<<1) | (dx<<16) | (ty<<25);
- if (code & 0x1000) code ^= 0x1e<<25;
- *hc++ = code, *hc++ = pack; // cache it
- }
- continue;
- } else if (code != blank) {
- if (code & 0x0800) TileFlip(pd + dx, pack, pal);
- else TileNorm(pd + dx, pack, pal);
- }
- }
- // terminate the cache list
- *hc = 0;
- }
- // --------------------------------------------
- #ifndef _ASM_DRAW_C
- static void DrawLayer(int plane_sh, u32 *hcache, int cellskip, int maxcells,
- struct PicoEState *est)
- {
- 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
- switch (width) {
- case 1: ymask &= 0x1ff; break;
- case 2: ymask = 0x007; break;
- case 3: ymask = 0x0ff; break;
- }
- // Find name table:
- if (plane_sh&LF_PLANE) 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
- switch (pvid->reg[11]&3) {
- case 1: htab += (est->DrawScanline<<1) & 0x0f; break;
- case 2: htab += (est->DrawScanline<<1) & ~0x0f; break; // Offset by tile
- case 3: htab += (est->DrawScanline<<1); break; // Offset by line
- }
- htab+=plane_sh&LF_PLANE; // A or B
- // Get horizontal scroll value, will be masked later
- ts.hscroll = PicoMem.vram[htab & 0x7fff];
- if((pvid->reg[12]&6) == 6) {
- // interlace mode 2
- vscroll = PicoMem.vsram[plane_sh&LF_PLANE]; // Get vertical scroll value
- // Find the line in the name table
- ts.line=(vscroll+(est->DrawScanline<<1))&((ymask<<1)|1);
- ts.nametab+=(ts.line>>4)<<shift[width];
- DrawStripInterlace(&ts, plane_sh);
- } 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
- // vscroll value for leftmost cells in case of hscroll not on 16px boundary
- // XXX it's unclear what exactly the hw is doing. Continue reading where it
- // stopped last seems to work best (H40: 0x50 (wrap->0x00), H32 0x40).
- plane_sh |= PicoMem.vsram[(pvid->reg[12]&1?0x00:0x20) + (plane_sh&LF_PLANE)] << 16;
- DrawStripVSRam(&ts, plane_sh, cellskip);
- } else {
- vscroll = PicoMem.vsram[plane_sh&LF_PLANE]; // Get vertical scroll value
- // Find the line in the name table
- ts.line=(vscroll+est->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,
- struct PicoEState *est)
- {
- unsigned char *pd = Pico.est.HighCol;
- 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+=(est->DrawScanline>>3)<<6;
- }
- else
- {
- nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode
- nametab+=(est->DrawScanline>>3)<<5;
- }
- tilex=tstart<<1;
- if (prio && !(est->rendstatus & PDRAW_WND_DIFF_PRIO)) {
- // all tiles processed in low prio pass
- return;
- }
- tend<<=1;
- ty=(est->DrawScanline&7)<<1; // Y-Offset into tile
- // Draw tiles across screen:
- if (!sh)
- {
- for (; tilex < tend; tilex++)
- {
- unsigned int pack;
- int dx, addr;
- int pal;
- code = PicoMem.vram[nametab + tilex];
- if ((code>>15) != prio) {
- est->rendstatus |= PDRAW_WND_DIFF_PRIO;
- continue;
- }
- if (code==blank) continue;
- // Get tile address/2:
- addr=(code&0x7ff)<<4;
- if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + addr));
- if (!pack) {
- blank = code;
- continue;
- }
- pal = ((code >> 9) & 0x30);
- dx = 8 + (tilex << 3);
- if (code & 0x0800) TileFlip(pd + dx, pack, pal);
- else TileNorm(pd + dx, pack, pal);
- }
- }
- else
- {
- for (; tilex < tend; tilex++)
- {
- unsigned int pack;
- int dx, addr;
- int pal;
- code = PicoMem.vram[nametab + tilex];
- if((code>>15) != prio) {
- est->rendstatus |= PDRAW_WND_DIFF_PRIO;
- continue;
- }
- pal=((code>>9)&0x30);
- if (prio) {
- int *zb = (int *)(est->HighCol+8+(tilex<<3));
- *zb++ &= 0x7f7f7f7f;
- *zb &= 0x7f7f7f7f;
- } else {
- pal |= 0x80;
- }
- if(code==blank) continue;
- // Get tile address/2:
- addr=(code&0x7ff)<<4;
- if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + addr));
- if (!pack) {
- blank = code;
- continue;
- }
- dx = 8 + (tilex << 3);
- if (code & 0x0800) TileFlip(pd + dx, pack, pal);
- else TileNorm(pd + dx, pack, pal);
- }
- }
- }
- // --------------------------------------------
- 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,
- // but leave lo pri op sprite markers alone
- int c = 320/4, *zb = (int *)(Pico.est.HighCol+8);
- Pico.est.rendstatus |= PDRAW_SHHI_DONE;
- while (c--)
- {
- *zb++ &= 0x7f7f7f7f;
- }
- }
- static void DrawTilesFromCache(u32 *hc, int sh, int rlim, struct PicoEState *est)
- {
- unsigned char *pd = Pico.est.HighCol;
- u32 code, dx;
- u32 pack;
- int pal;
- // *ts->hc++ = code | (dx<<16) | (ty<<25); // cache it
- if (sh && (est->rendstatus & (PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO)))
- {
- if (!(est->rendstatus & PDRAW_SHHI_DONE))
- DrawTilesFromCacheShPrep();
- sh = 0;
- }
- if (!sh)
- {
- while ((code=*hc++)) {
- pack = *hc++;
- if (!pack)
- continue;
- dx = (code >> 16) & 0x1ff;
- pal = ((code >> 9) & 0x30);
- if (rlim-dx < 0)
- goto last_cut_tile;
- if (code & 0x0800) TileFlip(pd + dx, pack, pal);
- else TileNorm(pd + dx, pack, pal);
- }
- }
- else
- {
- while ((code=*hc++)) {
- unsigned char *zb;
- dx = (code >> 16) & 0x1ff;
- zb = est->HighCol+dx;
- *zb++ &= 0x7f; *zb++ &= 0x7f; *zb++ &= 0x7f; *zb++ &= 0x7f;
- *zb++ &= 0x7f; *zb++ &= 0x7f; *zb++ &= 0x7f; *zb++ &= 0x7f;
- pack = *hc++;
- if (!pack)
- continue;
- pal = ((code >> 9) & 0x30);
- if (rlim - dx < 0)
- goto last_cut_tile;
- if (code & 0x0800) TileFlip(pd + dx, pack, pal);
- else TileNorm(pd + dx, pack, pal);
- }
- }
- return;
- last_cut_tile:
- // for vertical window cutoff
- {
- unsigned int t;
- pd += dx;
- 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(s32 *sprite, int sh, int w)
- {
- void (*fTileFunc)(unsigned char *pd, unsigned int pack, unsigned char pal);
- unsigned char *pd = Pico.est.HighCol;
- int width=0,height=0;
- int row=0;
- s32 code=0;
- int pal;
- int tile=0,delta=0;
- int sx, sy;
- // 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=Pico.est.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<<7; // shadow
- if (sh && (code&0x6000) == 0x6000) {
- if(code&0x0800) fTileFunc=TileFlipSH_markop;
- else fTileFunc=TileNormSH_markop;
- } else if (sh) {
- if(code&0x0800) fTileFunc=TileFlipNonSH;
- else fTileFunc=TileNormNonSH;
- } else {
- if(code&0x0800) fTileFunc=TileFlip;
- else fTileFunc=TileNorm;
- }
- if (w) width = w; // tile limit
- for (; width; width--,sx+=8,tile+=delta)
- {
- unsigned int pack;
- if(sx<=0) continue;
- if(sx>=328) break; // Offscreen
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + (tile & 0x7fff)));
- fTileFunc(pd + sx, pack, pal);
- }
- }
- #endif
- static void DrawSpriteInterlace(u32 *sprite)
- {
- unsigned char *pd = Pico.est.HighCol;
- 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=CPU_LE2(sprite[0]);
- height=sy>>24;
- sy=(sy&0x3ff)-0x100; // Y
- width=(height>>2)&3; height&=3;
- width++; height++; // Width and height in tiles
- row=(Pico.est.DrawScanline<<1)-sy; // Row of the sprite we are on
- code=CPU_LE2(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)
- {
- unsigned int pack;
- if(sx<=0) continue;
- if(sx>=328) break; // Offscreen
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + (tile & 0x7fff)));
- if (code & 0x0800) TileFlip(pd + sx, pack, pal);
- else TileNorm(pd + sx, pack, pal);
- }
- }
- static NOINLINE void DrawAllSpritesInterlace(int pri, int sh)
- {
- struct PicoVideo *pvid=&Pico.video;
- int i,u,table,link=0,sline=Pico.est.DrawScanline<<1;
- u32 *sprites[80]; // Sprite index
- int max_sprites = Pico.video.reg[12]&1 ? 80 : 64;
- 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 < max_sprites && link < max_sprites; u++)
- {
- u32 *sprite;
- int code, sx, sy, height;
- sprite=(u32 *)(PicoMem.vram+((table+(link<<2))&0x7ffc)); // Find sprite
- // get sprite info
- code = CPU_LE2(sprite[0]);
- sx = CPU_LE2(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
- /*
- * s/h drawing: lo_layers|40, lo_sprites|40 && mark_op,
- * hi_layers&=~40, hi_sprites
- *
- * 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, const struct PicoEState *est)
- {
- static void (*tilefuncs[2][2][2])(unsigned char *, unsigned, unsigned char) = {
- { {NULL, NULL}, {TileNorm, TileFlip} },
- { {TileNormSH_onlyop_lp, TileFlipSH_onlyop_lp}, {TileNormSH, TileFlipSH} }
- }; // [sh?][hi?][flip?]
- void (*fTileFunc)(unsigned char *pd, unsigned int pack, unsigned char pal);
- unsigned char *pd = Pico.est.HighCol;
- unsigned char *p;
- int cnt, w;
- cnt = sprited[0] & 0x7f;
- if (cnt == 0) return;
- p = &sprited[4];
- if ((sprited[1] & (SPRL_TILE_OVFL|SPRL_HAVE_MASK0)) == (SPRL_TILE_OVFL|SPRL_HAVE_MASK0))
- return; // masking effective due to tile overflow
- // Go through sprites backwards:
- w = p[cnt]; // possibly clipped width of last sprite
- for (cnt--; cnt >= 0; cnt--, w = 0)
- {
- s32 *sprite, code;
- int pal, tile, sx, sy;
- int offs, delta, width, height, row;
- offs = (p[cnt] & 0x7f) * 2;
- sprite = est->HighPreSpr + offs;
- code = sprite[1];
- pal = (code>>9)&0x30;
- fTileFunc = tilefuncs[pal == 0x30][!!(code & 0x8000)][!!(code & 0x800)];
- if (fTileFunc == NULL) continue; // non-operator low sprite, already drawn
- // 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=est->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
- if (w) width = w; // tile limit
- for (; width; width--,sx+=8,tile+=delta)
- {
- unsigned int pack;
- if(sx<=0) continue;
- if(sx>=328) break; // Offscreen
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + (tile & 0x7fff)));
- fTileFunc(pd + sx, pack, pal);
- }
- }
- }
- #endif // !_ASM_DRAW_C
- static void DrawSpritesHiAS(unsigned char *sprited, int sh)
- {
- static unsigned (*tilefuncs[2][2][2])(unsigned, unsigned char *, unsigned, unsigned char) = {
- { {TileNormAS_onlymark, TileFlipAS_onlymark}, {TileNormAS, TileFlipAS} },
- { {TileNormSH_AS_onlyop_lp, TileFlipSH_AS_onlyop_lp}, {TileNormSH_AS, TileFlipSH_AS} }
- }; // [sh?][hi?][flip?]
- unsigned (*fTileFunc)(unsigned m, unsigned char *pd, unsigned int pack, unsigned char pal);
- unsigned char *pd = Pico.est.HighCol;
- unsigned char mb[sizeof(DefHighCol)/8];
- unsigned char *p, *mp;
- unsigned m;
- int entry, cnt;
- cnt = sprited[0] & 0x7f;
- if (cnt == 0) return;
- memset(mb, 0xff, sizeof(mb));
- p = &sprited[4];
- if ((sprited[1] & (SPRL_TILE_OVFL|SPRL_HAVE_MASK0)) == (SPRL_TILE_OVFL|SPRL_HAVE_MASK0))
- return; // masking effective due to tile overflow
- // Go through sprites:
- for (entry = 0; entry < cnt; entry++)
- {
- s32 *sprite, code;
- int 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;
- fTileFunc = tilefuncs[(sh && pal == 0x30)][!!(code&0x8000)][!!(code&0x800)];
- // 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=Pico.est.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
- if (entry+1 == cnt) width = p[entry+1]; // last sprite width limited?
- while (sx <= 0 && width) width--, sx+=8, tile+=delta; // Offscreen
- mp = mb+(sx>>3);
- for (m = *mp; width; width--, sx+=8, tile+=delta, *mp++ = m, m >>= 8)
- {
- unsigned int pack;
- if(sx>=328) break; // Offscreen
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + (tile & 0x7fff)));
- m |= mp[1] << 8; // next mask byte
- // shift mask bits to bits 8-15 for easier load/store handling
- m = fTileFunc(m << (8-(sx&0x7)), pd + sx, pack, pal) >> (8-(sx&0x7));
- }
- *mp = m; // write last mask byte
- }
- }
- #ifdef FORCE
- // NB lots of duplicate code, all for the sake of a small performance gain.
- static void DrawStripForced(struct TileStrip *ts, int cellskip)
- {
- unsigned char *pd = Pico.est.HighCol;
- int tilex, dx, ty, addr=0, cells;
- u32 code = 0, oldcode = -1;
- int pal = 0;
- // Draw tiles across screen:
- 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--)
- {
- u32 pack;
- code = PicoMem.vram[ts->nametab + (tilex & ts->xmask)];
- if (code!=oldcode) {
- oldcode = code;
- // Get tile address/2:
- addr = ((code&0x7ff)<<4) + ty;
- if (code & 0x1000) addr^=0xe; // Y-flip
- pal = (code>>9)&0x30;
- }
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + addr));
- if (code & 0x0800) TileFlip_and(pd + dx, pack, pal);
- else TileNorm_and(pd + dx, pack, pal);
- }
- }
- static void DrawStripVSRamForced(struct TileStrip *ts, int plane_sh, int cellskip)
- {
- unsigned char *pd = Pico.est.HighCol;
- int tilex, dx, ty=0, addr=0, cell=0, nametabadd=0;
- u32 code=0, oldcode=-1;
- int pal=0, scan=Pico.est.DrawScanline, plane;
- // Draw tiles across screen:
- plane = plane_sh & LF_PLANE;
- tilex=(-ts->hscroll)>>3;
- dx=((ts->hscroll-1)&7)+1;
- if (ts->hscroll & 0x0f) {
- int adj = ((ts->hscroll ^ dx) >> 3) & 1;
- cell -= adj + 1;
- ts->cells -= adj;
- PicoMem.vsram[0x3e] = PicoMem.vsram[0x3f] = plane_sh >> 16;
- }
- cell+=cellskip;
- tilex+=cellskip;
- dx+=cellskip<<3;
- if ((cell&1)==1)
- {
- int line,vscroll;
- vscroll = PicoMem.vsram[plane + (cell&0x3e)];
- // 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
- }
- for (; cell < ts->cells; dx+=8,tilex++,cell++)
- {
- unsigned int pack;
- if ((cell&1)==0)
- {
- int line,vscroll;
- vscroll = PicoMem.vsram[plane + (cell&0x3e)];
- // 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=PicoMem.vram[ts->nametab+nametabadd+(tilex&ts->xmask)];
- if (code!=oldcode) {
- oldcode = code;
- // Get tile address/2:
- addr=(code&0x7ff)<<4;
- pal = (code>>9)&0x30; // shadow
- }
- pack = code & 0x1000 ? ty^0xe : ty; // Y-flip
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + addr+pack));
- if (code & 0x0800) TileFlip_and(pd + dx, pack, pal);
- else TileNorm_and(pd + dx, pack, pal);
- }
- }
- void DrawStripInterlaceForced(struct TileStrip *ts)
- {
- unsigned char *pd = Pico.est.HighCol;
- int tilex = 0, dx = 0, ty = 0, cells;
- int oldcode = -1;
- unsigned int pal = 0, pack = 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--)
- {
- u32 code = PicoMem.vram[ts->nametab + (tilex & ts->xmask)];
- if (code!=oldcode) {
- oldcode = code;
- // Get tile address/2:
- u32 addr = ((code&0x3ff)<<5) + ty;
- if (code & 0x1000) addr ^= 0x1e; // Y-flip
- pal = (code>>9)&0x30; // shadow
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + addr));
- }
- if (code & 0x0800) TileFlip_and(pd + dx, pack, pal);
- else TileNorm_and(pd + dx, pack, pal);
- }
- }
- // XXX only duplicated to avoid ARM asm hassles
- static void DrawLayerForced(int plane_sh, int cellskip, int maxcells,
- struct PicoEState *est)
- {
- 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.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
- switch (width) {
- case 1: ymask &= 0x1ff; break;
- case 2: ymask = 0x007; break;
- case 3: ymask = 0x0ff; break;
- }
- // 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
- switch (pvid->reg[11]&3) {
- case 1: htab += (est->DrawScanline<<1) & 0x0f; break;
- case 2: htab += (est->DrawScanline<<1) & ~0x0f; break; // Offset by tile
- case 3: htab += (est->DrawScanline<<1); break; // Offset by line
- }
- htab+=plane_sh&1; // A or B
- // Get horizontal scroll value, will be masked later
- ts.hscroll = PicoMem.vram[htab & 0x7fff];
- if((pvid->reg[12]&6) == 6) {
- // interlace mode 2
- vscroll = PicoMem.vsram[plane_sh & 1]; // Get vertical scroll value
- // Find the line in the name table
- ts.line=(vscroll+(est->DrawScanline<<1))&((ymask<<1)|1);
- ts.nametab+=(ts.line>>4)<<shift[width];
- DrawStripInterlaceForced(&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
- // vscroll value for leftmost cells in case of hscroll not on 16px boundary
- // XXX it's unclear what exactly the hw is doing. Continue reading where it
- // stopped last seems to work best (H40: 0x50 (wrap->0x00), H32 0x40).
- plane_sh |= PicoMem.vsram[(pvid->reg[12]&1?0x00:0x20) + (plane_sh&1)] << 16;
- DrawStripVSRamForced(&ts, plane_sh, cellskip);
- } else {
- vscroll = PicoMem.vsram[plane_sh & 1]; // Get vertical scroll value
- // Find the line in the name table
- ts.line=(vscroll+est->DrawScanline)&ymask;
- ts.nametab+=(ts.line>>3)<<shift[width];
- DrawStripForced(&ts, cellskip);
- }
- }
- static void DrawSpritesForced(unsigned char *sprited)
- {
- unsigned (*fTileFunc)(unsigned m, unsigned char *pd, unsigned int pack, unsigned char pal);
- unsigned char *pd = Pico.est.HighCol;
- unsigned char mb[sizeof(DefHighCol)/8];
- unsigned char *p, *mp;
- unsigned m;
- int entry, cnt;
- cnt = sprited[0] & 0x7f;
- if (cnt == 0) { memset(pd, 0, sizeof(DefHighCol)); return; }
-
- memset(mb, 0xff, sizeof(mb));
- p = &sprited[4];
- if ((sprited[1] & (SPRL_TILE_OVFL|SPRL_HAVE_MASK0)) == (SPRL_TILE_OVFL|SPRL_HAVE_MASK0))
- return; // masking effective due to tile overflow
- // Go through sprites:
- for (entry = 0; entry < cnt; entry++)
- {
- s32 *sprite, code;
- int 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&0x800) fTileFunc = TileFlipSH_AS_and;
- else fTileFunc = TileNormSH_AS_and;
- // 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=Pico.est.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
- if (entry+1 == cnt) width = p[entry+1]; // last sprite width limited?
- while (sx <= 0 && width) width--, sx+=8, tile+=delta; // Offscreen
- mp = mb+(sx>>3);
- for (m = *mp; width; width--, sx+=8, tile+=delta, *mp++ = m, m >>= 8)
- {
- u32 pack;
- if(sx>=328) break; // Offscreen
- pack = CPU_LE2(*(u32 *)(PicoMem.vram + (tile & 0x7fff)));
- m |= mp[1] << 8; // next mask byte
- // shift mask bits to bits 8-15 for easier load/store handling
- m = fTileFunc(m << (8-(sx&0x7)), pd + sx, pack, pal) >> (8-(sx&0x7));
- }
- *mp = m; // write last mask byte
- }
- // anything not covered by a sprite is off (XXX or bg?)
- for (cnt = 1; cnt < sizeof(mb)-1; cnt++)
- if (mb[cnt] == 0xff) {
- *(u32 *)(pd+8*cnt+0) = 0;
- *(u32 *)(pd+8*cnt+4) = 0;
- } else if (mb[cnt])
- for (m = 0; m < 8; m++)
- if (mb[cnt] & (1<<m))
- pd[8*cnt+m] = 0;
- }
- #endif
- // 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
- static NOINLINE void PrepareSprites(int max_lines)
- {
- const struct PicoVideo *pvid=&Pico.video;
- const struct PicoEState *est=&Pico.est;
- int u,link=0,sh;
- int table=0;
- s32 *pd = HighPreSpr;
- int 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 (*est->PicoOpt & POPT_DIS_SPRITE_LIM)
- max_line_sprites = MAX_LINE_SPRITES;
- 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
- for (u = est->DrawScanline; u < max_lines; u++)
- *((int *)&HighLnSpr[u][0]) = 0;
- for (u = 0; u < max_sprites && link < max_sprites; u++)
- {
- u32 *sprite;
- int code, code2, sx, sy, hv, height, width;
- sprite=(u32 *)(PicoMem.vram+((table+(link<<2))&0x7ffc)); // Find sprite
- // 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]
- sy = (code&0x1ff)-0x80;
- hv = (code>>24)&0xf;
- height = (hv&3)+1;
- width = (hv>>2)+1;
- code2 = CPU_LE2(sprite[1]);
- sx = (code2>>16)&0x1ff;
- sx -= 0x78; // Get X coordinate + 8
- if (sy < max_lines && sy + (height<<3) >= est->DrawScanline) // sprite onscreen (y)?
- {
- int entry, y, w, 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 >= est->DrawScanline) ? sy : est->DrawScanline;
- for (; y < sy + (height<<3) && y < max_lines; y++)
- {
- unsigned char *p = &HighLnSpr[y][0];
- int cnt = p[0];
- if (p[3] >= max_line_sprites) continue; // sprite limit?
- if (p[1] & SPRL_MASKED) continue; // masked?
- w = width;
- if (p[2] + width > max_line_sprites*2) { // tile limit?
- if (y+1 < 240) HighLnSpr[y+1][1] |= SPRL_TILE_OVFL;
- if (p[2] >= max_line_sprites*2) continue;
- w = max_line_sprites*2 - p[2];
- }
- p[2] += w;
- p[3] ++;
- if (sx == -0x78) {
- if (p[1] & (SPRL_HAVE_X|SPRL_TILE_OVFL))
- p[1] |= SPRL_MASKED; // masked, no more sprites for this line
- if (!(p[1] & SPRL_HAVE_X) && cnt == 0)
- p[1] |= SPRL_HAVE_MASK0; // 1st sprite is masking
- } else
- p[1] |= SPRL_HAVE_X;
- if (!onscr_x) continue; // offscreen x
- p[4+cnt] = entry;
- p[5+cnt] = w; // width clipped by tile limit for sprite renderer
- 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[4+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: f %x c %2i/%2i w %2i: ", u, HighLnSpr[u][1],
- HighLnSpr[u][0], HighLnSpr[u][3], HighLnSpr[u][2]);
- for (y = 0; y < HighLnSpr[u][0]; y++) {
- s32 *sp = HighPreSpr + (HighLnSpr[u][y+4]&0x7f) * 2;
- printf(" %i(%x/%x)", HighLnSpr[u][y+4],sp[0],sp[1]);
- }
- printf("\n");
- }
- #endif
- }
- #ifndef _ASM_DRAW_C
- static void DrawAllSprites(unsigned char *sprited, int prio, int sh,
- struct PicoEState *est)
- {
- unsigned char *p;
- int cnt, w;
- cnt = sprited[0] & 0x7f;
- if (cnt == 0) return;
- p = &sprited[4];
- if ((sprited[1] & (SPRL_TILE_OVFL|SPRL_HAVE_MASK0)) == (SPRL_TILE_OVFL|SPRL_HAVE_MASK0))
- return; // masking effective due to tile overflow
- // Go through sprites backwards:
- w = p[cnt]; // possibly clipped width of last sprite
- for (cnt--; cnt >= 0; cnt--, w = 0)
- {
- s32 *sp = HighPreSpr + (p[cnt]&0x7f) * 2;
- if ((p[cnt] >> 7) != prio) continue;
- DrawSprite(sp, sh, w);
- }
- }
- // --------------------------------------------
- void BackFill(int reg7, int sh, struct PicoEState *est)
- {
- unsigned int back;
- // Start with a blank scanline (background colour):
- back=reg7&0x3f;
- back|=sh<<7; // shadow
- back|=back<<8;
- back|=back<<16;
- memset32((int *)(est->HighCol+8), back, 320/4);
- }
- #endif
- // --------------------------------------------
- void PicoDoHighPal555_8bit(int sh, int line, struct PicoEState *est)
- {
- unsigned int *spal, *dpal;
- unsigned int cnt = (sh ? 1 : est->SonicPalCount+1);
- unsigned int t, i;
- // reset dirty only if there are no outstanding changes
- if (Pico.m.dirtyPal == 2)
- Pico.m.dirtyPal = 0;
- // In Sonic render mode palettes were backuped in SonicPal
- spal = (void *)est->SonicPal;
- dpal = (void *)est->HighPal;
- // additional palettes stored after in-frame changes
- for (i = 0; i < cnt * 0x40 / 2; i++) {
- t = spal[i];
- // treat it like it was 4-bit per channel, since in s/h mode it somewhat is that.
- // otherwise intensity difference between this and s/h will be wrong
- t = PXCONV(t);
- t |= (t >> 4) & PXMASKL;
- dpal[i] = t;
- }
- // norm: xxx0, sh: 0xxx, hi: 0xxx + 7
- if (sh)
- {
- // shadowed pixels
- for (i = 0; i < 0x40 / 2; i++) {
- dpal[0xc0/2 + i] = dpal[i];
- dpal[0x80/2 + i] = (dpal[i] >> 1) & PXMASKH;
- }
- // hilighted pixels
- for (i = 0; i < 0x40 / 2; i++) {
- t = ((dpal[i] >> 1) & PXMASKH) + PXMASKH;
- t |= (t >> 4) & PXMASKL;
- dpal[0x40/2 + i] = t;
- }
- }
- }
- #ifndef _ASM_DRAW_C
- void PicoDoHighPal555(int sh, int line, struct PicoEState *est)
- {
- unsigned int *spal, *dpal;
- unsigned int t, i;
- Pico.m.dirtyPal = 0;
- spal = (void *)PicoMem.cram;
- dpal = (void *)est->HighPal;
- for (i = 0; i < 0x40 / 2; i++) {
- t = spal[i];
- // treat it like it was 4-bit per channel, since in s/h mode it somewhat is that.
- // otherwise intensity difference between this and s/h will be wrong
- t = PXCONV(t);
- t |= (t >> 4) & PXMASKL;
- dpal[i] = dpal[0xc0/2 + i] = t;
- }
- // norm: xxx0, sh: 0xxx, hi: 0xxx + 7
- if (sh)
- {
- // shadowed pixels
- for (i = 0; i < 0x40 / 2; i++)
- dpal[0x80/2 + i] = (dpal[i] >> 1) & PXMASKH;
- // hilighted pixels
- for (i = 0; i < 0x40 / 2; i++) {
- t = ((dpal[i] >> 1) & PXMASKH) + PXMASKH;
- t |= (t >> 4) & PXMASKL;
- dpal[0x40/2 + i] = t;
- }
- }
- }
- void FinalizeLine555(int sh, int line, struct PicoEState *est)
- {
- unsigned short *pd=est->DrawLineDest;
- unsigned char *ps=est->HighCol+8;
- unsigned short *pal=est->HighPal;
- int len;
- if (DrawLineDestIncrement == 0)
- return;
- PicoDrawUpdateHighPal();
- if ((PicoIn.AHW & PAHW_SMS) && (Pico.m.hardware & 0x3) == 0x3)
- len = 160;
- else if (Pico.video.reg[12]&1) len = 320;
- else len = 256;
- if ((*est->PicoOpt & POPT_EN_SOFTSCALE) && len < 320) {
- if (len == 256) {
- switch (PicoIn.filter) {
- case 3: h_upscale_bl4_4_5(pd, 320, ps, 256, len, f_pal); break;
- case 2: h_upscale_bl2_4_5(pd, 320, ps, 256, len, f_pal); break;
- case 1: h_upscale_snn_4_5(pd, 320, ps, 256, len, f_pal); break;
- default: h_upscale_nn_4_5(pd, 320, ps, 256, len, f_pal); break;
- }
- if (est->rendstatus & PDRAW_32X_SCALE) { // 32X needs scaled CLUT data
- unsigned char *psc = ps - 256, *pdc = psc;
- rh_upscale_nn_4_5(pdc, 320, psc, 256, 256, f_nop);
- }
- } else if (len == 160)
- switch (PicoIn.filter) {
- case 3:
- case 2: h_upscale_bl2_1_2(pd, 320, ps, 160, len, f_pal); break;
- default: h_upscale_nn_1_2(pd, 320, ps, 160, len, f_pal); break;
- }
- } else {
- if (!(*est->PicoOpt & POPT_DIS_32C_BORDER) && len < 320)
- pd += (320-len) / 2;
- #if 1
- h_copy(pd, 320, ps, 320, len, f_pal);
- #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)
- amips_clut_6bit(pd, ps, pal, len);
- else amips_clut(pd, ps, pal, len);
- #endif
- }
- }
- #endif
- void FinalizeLine8bit(int sh, int line, struct PicoEState *est)
- {
- unsigned char *pd = est->DrawLineDest;
- unsigned char *ps = est->HighCol+8;
- int len;
- static int dirty_line;
- // a hack for mid-frame palette changes
- if (Pico.m.dirtyPal == 1)
- {
- // store a maximum of 2 additional palettes in SonicPal
- if (est->SonicPalCount < 2 &&
- (!(est->rendstatus & PDRAW_SONIC_MODE) || (line - dirty_line > 4))) {
- est->SonicPalCount ++;
- dirty_line = line;
- est->rendstatus |= PDRAW_SONIC_MODE;
- }
- blockcpy(est->SonicPal+est->SonicPalCount*0x40, PicoMem.cram, 0x40*2);
- Pico.m.dirtyPal = 2;
- }
- if ((PicoIn.AHW & PAHW_SMS) && (Pico.m.hardware & 0x3) == 0x3)
- len = 160;
- else if (Pico.video.reg[12]&1) len = 320;
- else len = 256;
- if (DrawLineDestIncrement == 0)
- pd = est->HighCol+8;
- if ((PicoIn.opt & POPT_EN_SOFTSCALE) && len < 320) {
- unsigned char pal = 0;
- if (!sh && (est->rendstatus & PDRAW_SONIC_MODE))
- pal = est->SonicPalCount*0x40;
- // Smoothing can't be used with CLUT, hence it's always Nearest Neighbour.
- if (len == 256)
- // use reverse version since src and dest ptr may be the same.
- rh_upscale_nn_4_5(pd, 320, ps, 256, len, f_or);
- else
- rh_upscale_nn_1_2(pd, 320, ps, 256, len, f_or);
- } else {
- if (!(*est->PicoOpt & POPT_DIS_32C_BORDER) && len < 320)
- pd += (320-len) / 2;
- if (!sh && (est->rendstatus & PDRAW_SONIC_MODE))
- // select active backup palette
- blockcpy_or(pd, ps, len, est->SonicPalCount*0x40);
- else if (pd != ps)
- blockcpy(pd, ps, len);
- }
- }
- static void (*FinalizeLine)(int sh, int line, struct PicoEState *est);
- // --------------------------------------------
- static int DrawDisplay(int sh)
- {
- struct PicoEState *est=&Pico.est;
- unsigned char *sprited = &HighLnSpr[est->DrawScanline][0];
- struct PicoVideo *pvid=&Pico.video;
- int win=0, edge=0, hvwind=0, lflags;
- int maxw, maxcells;
- est->rendstatus &= ~(PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO|PDRAW_WND_DIFF_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 (est->DrawScanline>=edge) hvwind=1; }
- else { if (est->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 (!(pvid->debug_p & PVD_KILL_B)) {
- lflags = LF_PLANE_B | (sh<<1);
- DrawLayer(lflags, HighCacheB, 0, maxcells, est);
- }
- /* - layer A low - */
- lflags = LF_PLANE_A | (sh<<1);
- if (pvid->debug_p & PVD_KILL_A)
- ;
- else if (hvwind == 1)
- DrawWindow(0, maxcells>>1, 0, sh, est);
- else if (hvwind == 2) {
- DrawLayer(lflags, HighCacheA, (win&0x80) ? 0 : edge<<1, (win&0x80) ? edge<<1 : maxcells, est);
- DrawWindow( (win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 0, sh, est);
- }
- else
- DrawLayer(lflags, HighCacheA, 0, maxcells, est);
- /* - sprites low - */
- if (pvid->debug_p & PVD_KILL_S_LO)
- ;
- else if (est->rendstatus & PDRAW_INTERLACE)
- DrawAllSpritesInterlace(0, sh);
- else if (sprited[1] & SPRL_HAVE_LO)
- DrawAllSprites(sprited, 0, sh, est);
- /* - layer B hi - */
- if (!(pvid->debug_p & PVD_KILL_B) && HighCacheB[0])
- DrawTilesFromCache(HighCacheB, sh, maxw, est);
- /* - layer A hi - */
- if (pvid->debug_p & PVD_KILL_A)
- ;
- else if (hvwind == 1)
- DrawWindow(0, maxcells>>1, 1, sh, est);
- else if (hvwind == 2) {
- if (HighCacheA[0])
- DrawTilesFromCache(HighCacheA, sh, (win&0x80) ? edge<<4 : maxw, est);
- DrawWindow((win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 1, sh, est);
- } else
- if (HighCacheA[0])
- DrawTilesFromCache(HighCacheA, sh, maxw, est);
- /* - sprites hi - */
- if (pvid->debug_p & PVD_KILL_S_HI)
- ;
- else if (est->rendstatus & PDRAW_INTERLACE)
- DrawAllSpritesInterlace(1, sh);
- // have sprites without layer pri bit ontop of sprites with that bit
- else if ((sprited[1] & SPRL_LO_ABOVE_HI) && (PicoIn.opt & POPT_ACC_SPRITES))
- DrawSpritesHiAS(sprited, sh);
- else if (sh && (sprited[1] & SPRL_MAY_HAVE_OP))
- DrawSpritesSHi(sprited, est);
- else if (sprited[1] & SPRL_HAVE_HI)
- DrawAllSprites(sprited, 1, 0, est);
- #ifdef FORCE
- if (pvid->debug_p & PVD_FORCE_B) {
- lflags = LF_PLANE_B | (sh<<1);
- DrawLayerForced(lflags, 0, maxcells, est);
- } else if (pvid->debug_p & PVD_FORCE_A) {
- lflags = LF_PLANE_A | (sh<<1);
- DrawLayerForced(lflags, 0, maxcells, est);
- } else if (pvid->debug_p & PVD_FORCE_S)
- DrawSpritesForced(sprited);
- #endif
- #if 0
- {
- int *c, a, b;
- for (a = 0, c = HighCacheA; *c; c+=2, a++);
- for (b = 0, c = HighCacheB; *c; c+=2, b++);
- printf("%i:%03i: a=%i, b=%i\n", Pico.m.frame_count,
- Pico.est.DrawScanline, a, b);
- }
- #endif
- return 0;
- }
- // MUST be called every frame
- PICO_INTERNAL void PicoFrameStart(void)
- {
- int loffs = 8, lines = 224, coffs = 0, columns = 320;
- int sprep = Pico.est.rendstatus & (PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES);
- int skipped = Pico.est.rendstatus & PDRAW_SKIP_FRAME;
- // prepare to do this frame
- Pico.est.rendstatus = 0;
- if ((Pico.video.reg[12] & 6) == 6)
- Pico.est.rendstatus |= PDRAW_INTERLACE; // interlace mode
- if (!(Pico.video.reg[12] & 1)) {
- Pico.est.rendstatus |= PDRAW_32_COLS;
- if (!(PicoIn.opt & POPT_EN_SOFTSCALE)) {
- columns = 256;
- coffs = 32;
- }
- }
- if (Pico.video.reg[1] & 8) {
- Pico.est.rendstatus |= PDRAW_30_ROWS;
- lines = 240;
- loffs = 0;
- }
- if (PicoIn.opt & POPT_DIS_32C_BORDER)
- coffs = 0;
- if (Pico.est.rendstatus != rendstatus_old || lines != rendlines) {
- rendlines = lines;
- // mode_change() might reset rendstatus_old by calling SetColorFormat
- emu_video_mode_change(loffs, lines, coffs, columns);
- rendstatus_old = Pico.est.rendstatus;
- }
- if (PicoIn.skipFrame) // preserve this until something is rendered at last
- Pico.est.rendstatus |= PDRAW_SKIP_FRAME;
- if (sprep | skipped)
- Pico.est.rendstatus |= PDRAW_PARSE_SPRITES;
- if (PicoIn.AHW & PAHW_32X)
- Pico.est.rendstatus |= PDRAW_32X_SCALE;
- Pico.est.HighCol = HighColBase + loffs * HighColIncrement;
- Pico.est.DrawLineDest = (char *)DrawLineDestBase + loffs * DrawLineDestIncrement;
- Pico.est.DrawScanline = 0;
- skip_next_line = 0;
- if (FinalizeLine == FinalizeLine8bit) {
- // make a backup of the current palette in case Sonic mode is detected later
- Pico.m.dirtyPal = (Pico.m.dirtyPal || Pico.est.SonicPalCount ? 2 : 0);
- blockcpy(Pico.est.SonicPal, PicoMem.cram, 0x40*2);
- }
- Pico.est.SonicPalCount = 0;
- }
- static void DrawBlankedLine(int line, int offs, int sh, int bgc)
- {
- int skip = skip_next_line;
- if (PicoScanBegin != NULL && skip == 0)
- skip = PicoScanBegin(line + offs);
- if (skip) {
- skip_next_line = skip - 1;
- return;
- }
- BackFill(bgc, sh, &Pico.est);
- if (FinalizeLine != NULL)
- FinalizeLine(sh, line, &Pico.est);
- if (PicoScanEnd != NULL)
- skip_next_line = PicoScanEnd(line + offs);
- Pico.est.HighCol += HighColIncrement;
- Pico.est.DrawLineDest = (char *)Pico.est.DrawLineDest + DrawLineDestIncrement;
- }
- static void PicoLine(int line, int offs, int sh, int bgc)
- {
- int skip = skip_next_line;
- Pico.est.DrawScanline = line;
- if (PicoScanBegin != NULL && skip == 0)
- skip = PicoScanBegin(line + offs);
- if (skip) {
- skip_next_line = skip - 1;
- return;
- }
- if (Pico.video.debug_p & (PVD_FORCE_A | PVD_FORCE_B | PVD_FORCE_S))
- bgc = 0x3f;
- // Draw screen:
- BackFill(bgc, sh, &Pico.est);
- if (Pico.video.reg[1]&0x40)
- DrawDisplay(sh);
- if (FinalizeLine != NULL)
- FinalizeLine(sh, line, &Pico.est);
- if (PicoScanEnd != NULL)
- skip_next_line = PicoScanEnd(line + offs);
- Pico.est.HighCol += HighColIncrement;
- Pico.est.DrawLineDest = (char *)Pico.est.DrawLineDest + DrawLineDestIncrement;
- }
- void PicoDrawSync(int to, int blank_last_line)
- {
- struct PicoEState *est = &Pico.est;
- int line, offs = 0;
- int sh = (Pico.video.reg[0xC] & 8) >> 3; // shadow/hilight?
- int bgc = Pico.video.reg[7];
- pprof_start(draw);
- if (rendlines != 240) {
- offs = 8;
- if (to > 223)
- to = 223;
- }
- if (est->DrawScanline <= to - blank_last_line && (est->rendstatus &
- (PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES|PDRAW_PARSE_SPRITES)))
- PrepareSprites(to - blank_last_line + 1);
- for (line = est->DrawScanline; line < to; line++)
- PicoLine(line, offs, sh, bgc);
- // last line
- if (line <= to)
- {
- if (blank_last_line)
- DrawBlankedLine(line, offs, sh, bgc);
- else PicoLine(line, offs, sh, bgc);
- line++;
- }
- est->DrawScanline = line;
- pprof_end(draw);
- }
- // also works for fast renderer
- void PicoDrawUpdateHighPal(void)
- {
- struct PicoEState *est = &Pico.est;
- if (Pico.m.dirtyPal) {
- int sh = (Pico.video.reg[0xC] & 8) >> 3; // shadow/hilight?
- if ((PicoIn.opt & POPT_ALT_RENDERER) | (est->rendstatus & PDRAW_SONIC_MODE))
- sh = 0; // no s/h support
- if (PicoIn.AHW & PAHW_SMS)
- PicoDoHighPal555SMS();
- else if (FinalizeLine == FinalizeLine8bit)
- PicoDoHighPal555_8bit(sh, 0, est);
- else
- PicoDoHighPal555(sh, 0, est);
- // cover for sprite priority bits if not in s/h or sonic mode
- if (!sh && !(est->rendstatus & PDRAW_SONIC_MODE)) {
- blockcpy(est->HighPal+0x40, est->HighPal, 0x40*2);
- blockcpy(est->HighPal+0x80, est->HighPal, 0x80*2);
- }
- Pico.est.HighPal[0xe0] = 0x0000; // black and white, reserved for OSD
- Pico.est.HighPal[0xf0] = 0xffff;
- }
- }
- void PicoDrawSetOutFormat(pdso_t which, int use_32x_line_mode)
- {
- PicoDrawSetInternalBuf(NULL, 0);
- PicoDrawSetOutBufMD(NULL, 0);
- PicoDraw2SetOutBuf(NULL, 0);
- switch (which)
- {
- case PDF_8BIT:
- FinalizeLine = FinalizeLine8bit;
- break;
- case PDF_RGB555:
- if ((PicoIn.AHW & PAHW_32X) && use_32x_line_mode)
- FinalizeLine = FinalizeLine32xRGB555;
- else
- FinalizeLine = FinalizeLine555;
- break;
- default:
- FinalizeLine = NULL;
- break;
- }
- if (PicoIn.AHW & PAHW_32X)
- PicoDrawSetOutFormat32x(which, use_32x_line_mode);
- PicoDrawSetOutputSMS(which);
- rendstatus_old = -1;
- Pico.m.dirtyPal = 1;
- }
- void PicoDrawSetOutBufMD(void *dest, int increment)
- {
- if (FinalizeLine == FinalizeLine8bit && increment >= 328) {
- // kludge for no-copy mode, using ALT_RENDERER layout
- PicoDrawSetInternalBuf(dest, increment);
- } else if (FinalizeLine == NULL) {
- PicoDrawSetInternalBuf(dest, increment); // needed for SMS
- PicoDraw2SetOutBuf(dest, increment);
- } else if (dest != NULL) {
- DrawLineDestBase = dest;
- DrawLineDestIncrement = increment;
- Pico.est.DrawLineDest = (char *)DrawLineDestBase + Pico.est.DrawScanline * increment;
- } else {
- DrawLineDestBase = DefOutBuff;
- DrawLineDestIncrement = 0;
- Pico.est.DrawLineDest = DefOutBuff;
- }
- }
- // note: may be called on the middle of frame
- void PicoDrawSetOutBuf(void *dest, int increment)
- {
- if (PicoIn.AHW & PAHW_32X)
- PicoDrawSetOutBuf32X(dest, increment);
- else
- PicoDrawSetOutBufMD(dest, increment);
- }
- void PicoDrawSetInternalBuf(void *dest, int increment)
- {
- if (dest != NULL) {
- HighColBase = dest;
- HighColIncrement = increment;
- Pico.est.HighCol = HighColBase + Pico.est.DrawScanline * increment;
- }
- else {
- HighColBase = DefHighCol;
- HighColIncrement = 0;
- Pico.est.HighCol = DefHighCol;
- }
- }
- void PicoDrawSetCallbacks(int (*begin)(unsigned int num), int (*end)(unsigned int num))
- {
- PicoScanBegin = NULL;
- PicoScanEnd = NULL;
- PicoScan32xBegin = NULL;
- PicoScan32xEnd = NULL;
- if ((PicoIn.AHW & PAHW_32X) && FinalizeLine != FinalizeLine32xRGB555) {
- PicoScan32xBegin = begin;
- PicoScan32xEnd = end;
- }
- else {
- PicoScanBegin = begin;
- PicoScanEnd = end;
- }
- }
- void PicoDrawInit(void)
- {
- Pico.est.DrawLineDest = DefOutBuff;
- Pico.est.HighCol = HighColBase;
- Pico.est.HighPreSpr = HighPreSpr;
- rendstatus_old = -1;
- }
- // vim:ts=2:sw=2:expandtab
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