[picodrive.git] / pico / 32x / draw.c

/*
 * PicoDrive
 * (C) notaz, 2009,2010
 *
 * This work is licensed under the terms of MAME license.
 * See COPYING file in the top-level directory.
 */
#include "../pico_int.h"

int (*PicoScan32xBegin)(unsigned int num);
int (*PicoScan32xEnd)(unsigned int num);
int Pico32xDrawMode;

static void convert_pal555(int invert_prio)
{
  unsigned int *ps = (void *)Pico32xMem->pal;
  unsigned int *pd = (void *)Pico32xMem->pal_native;
  unsigned int m1 = 0x001f001f;
  unsigned int m2 = 0x03e003e0;
  unsigned int m3 = 0xfc00fc00;
  unsigned int inv = 0;
  int i;

  if (invert_prio)
    inv = 0x00200020;

  // place prio to LS green bit
  for (i = 0x100/2; i > 0; i--, ps++, pd++) {
    unsigned int t = *ps;
    *pd = (((t & m1) << 11) | ((t & m2) << 1) | ((t & m3) >> 10)) ^ inv;
  }

  Pico32x.dirty_pal = 0;
}

// direct color mode
#define do_line_dc(pd, p32x, pmd, inv, pmd_draw_code)             \
{                                                                 \
  const unsigned int m1 = 0x001f;                                 \
  const unsigned int m2 = 0x03e0;                                 \
  const unsigned int m3 = 0x7c00;                                 \
  int i;                                                          \
                                                                  \
  for (i = 320; i > 0; i--, pd++, p32x++, pmd++) {                \
    unsigned short t = *p32x;                                     \
    if (*pmd != mdbg && !((t ^ inv) & 0x8000)) {                  \
      pmd_draw_code;                                              \
      continue;                                                   \
    }                                                             \
                                                                  \
    *pd = ((t & m1) << 11) | ((t & m2) << 1) | ((t & m3) >> 10);  \
  }                                                               \
}

// packed pixel mode
#define do_line_pp(pd, p32x, pmd, pmd_draw_code)                  \
{                                                                 \
  unsigned short t;                                               \
  int i;                                                          \
  for (i = 320; i > 0; i--, pd++, p32x++, pmd++) {                \
    t = pal[*(unsigned char *)((long)p32x ^ 1)];                  \
    if ((t & 0x20) || *pmd == mdbg)                               \
      *pd = t;                                                    \
    else                                                          \
      pmd_draw_code;                                              \
  }                                                               \
} 

// run length mode
#define do_line_rl(pd, p32x, pmd, pmd_draw_code)                  \
{                                                                 \
  unsigned short len, t;                                          \
  int i;                                                          \
  for (i = 320; i > 0; p32x++) {                                  \
    t = pal[*p32x & 0xff];                                        \
    for (len = (*p32x >> 8) + 1; len > 0 && i > 0; len--, i--, pd++, pmd++) { \
      if (*pmd == mdbg || (t & 0x20))                             \
        *pd = t;                                                  \
      else                                                        \
        pmd_draw_code;                                            \
    }                                                             \
  }                                                               \
}

void FinalizeLine32xRGB555(int sh, int line)
{
  unsigned short *pd = DrawLineDest;
  unsigned short *pal = Pico32xMem->pal_native;
  unsigned char  *pmd = HighCol + 8;
  unsigned short *dram, *p32x;
  unsigned char   mdbg;

  FinalizeLine555(sh, line);

  if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 0 || // 32x blanking
      // XXX: how is 32col mode hadled by real hardware?
      !(Pico.video.reg[12] & 1) || // 32col mode
      !(PicoDrawMask & PDRAW_32X_ON))
  {
    return;
  }

  dram = (void *)Pico32xMem->dram[Pico32x.vdp_regs[0x0a/2] & P32XV_FS];
  p32x = dram + dram[line];
  mdbg = Pico.video.reg[7] & 0x3f;

  if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 2) { // Direct Color Mode
    int inv_bit = (Pico32x.vdp_regs[0] & P32XV_PRI) ? 0x8000 : 0;
    do_line_dc(pd, p32x, pmd, inv_bit,);
    return;
  }

  if (Pico32x.dirty_pal)
    convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI);

  if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1) { // Packed Pixel Mode
    unsigned char *p32xb = (void *)p32x;
    if (Pico32x.vdp_regs[2 / 2] & P32XV_SFT)
      p32xb++;
    do_line_pp(pd, p32xb, pmd,);
  }
  else { // Run Length Mode
    do_line_rl(pd, p32x, pmd,);
  }
}

#define MD_LAYER_CODE \
  *dst = palmd[*pmd]

#define PICOSCAN_PRE \
  PicoScan32xBegin(l + (lines_sft_offs & 0xff)); \
  dst = DrawLineDest; \

#define PICOSCAN_POST \
  PicoScan32xEnd(l + (lines_sft_offs & 0xff)); \

#define make_do_loop(name, pre_code, post_code, md_code)        \
/* Direct Color Mode */                                         \
static void do_loop_dc##name(unsigned short *dst,               \
    unsigned short *dram, int lines_sft_offs, int mdbg)         \
{                                                               \
  int inv_bit = (Pico32x.vdp_regs[0] & P32XV_PRI) ? 0x8000 : 0; \
  unsigned char  *pmd = PicoDraw2FB +                           \
                          328 * (lines_sft_offs & 0xff) + 8;    \
  unsigned short *palmd = HighPal;                              \
  unsigned short *p32x;                                         \
  int lines = lines_sft_offs >> 16;                             \
  int l;                                                        \
  (void)palmd;                                                  \
  for (l = 0; l < lines; l++, pmd += 8) {                       \
    pre_code;                                                   \
    p32x = dram + dram[l];                                      \
    do_line_dc(dst, p32x, pmd, inv_bit, md_code);               \
    post_code;                                                  \
  }                                                             \
}                                                               \
                                                                \
/* Packed Pixel Mode */                                         \
static void do_loop_pp##name(unsigned short *dst,               \
    unsigned short *dram, int lines_sft_offs, int mdbg)         \
{                                                               \
  unsigned short *pal = Pico32xMem->pal_native;                 \
  unsigned char  *pmd = PicoDraw2FB +                           \
                          328 * (lines_sft_offs & 0xff) + 8;    \
  unsigned short *palmd = HighPal;                              \
  unsigned char  *p32x;                                         \
  int lines = lines_sft_offs >> 16;                             \
  int l;                                                        \
  (void)palmd;                                                  \
  for (l = 0; l < lines; l++, pmd += 8) {                       \
    pre_code;                                                   \
    p32x = (void *)(dram + dram[l]);                            \
    p32x += (lines_sft_offs >> 8) & 1;                          \
    do_line_pp(dst, p32x, pmd, md_code);                        \
    post_code;                                                  \
  }                                                             \
}                                                               \
                                                                \
/* Run Length Mode */                                           \
static void do_loop_rl##name(unsigned short *dst,               \
    unsigned short *dram, int lines_sft_offs, int mdbg)         \
{                                                               \
  unsigned short *pal = Pico32xMem->pal_native;                 \
  unsigned char  *pmd = PicoDraw2FB +                           \
                          328 * (lines_sft_offs & 0xff) + 8;    \
  unsigned short *palmd = HighPal;                              \
  unsigned short *p32x;                                         \
  int lines = lines_sft_offs >> 16;                             \
  int l;                                                        \
  (void)palmd;                                                  \
  for (l = 0; l < lines; l++, pmd += 8) {                       \
    pre_code;                                                   \
    p32x = dram + dram[l];                                      \
    do_line_rl(dst, p32x, pmd, md_code);                        \
    post_code;                                                  \
  }                                                             \
}

#ifdef _ASM_32X_DRAW
#undef make_do_loop
#define make_do_loop(name, pre_code, post_code, md_code) \
extern void do_loop_dc##name(unsigned short *dst,        \
    unsigned short *dram, int lines_offs, int mdbg);     \
extern void do_loop_pp##name(unsigned short *dst,        \
    unsigned short *dram, int lines_offs, int mdbg);     \
extern void do_loop_rl##name(unsigned short *dst,        \
    unsigned short *dram, int lines_offs, int mdbg);
#endif

make_do_loop(,,,)
make_do_loop(_md, , , MD_LAYER_CODE)
make_do_loop(_scan, PICOSCAN_PRE, PICOSCAN_POST, )
make_do_loop(_scan_md, PICOSCAN_PRE, PICOSCAN_POST, MD_LAYER_CODE)

typedef void (*do_loop_func)(unsigned short *dst, unsigned short *dram, int lines, int mdbg);
enum { DO_LOOP, DO_LOOP_MD, DO_LOOP_SCAN, DO_LOOP_MD_SCAN };

static const do_loop_func do_loop_dc_f[] = { do_loop_dc, do_loop_dc_md, do_loop_dc_scan, do_loop_dc_scan_md };
static const do_loop_func do_loop_pp_f[] = { do_loop_pp, do_loop_pp_md, do_loop_pp_scan, do_loop_pp_scan_md };
static const do_loop_func do_loop_rl_f[] = { do_loop_rl, do_loop_rl_md, do_loop_rl_scan, do_loop_rl_scan_md };

void PicoDraw32xLayer(int offs, int lines, int md_bg)
{
  int have_scan = PicoScan32xBegin != NULL && PicoScan32xEnd != NULL;
  const do_loop_func *do_loop;
  unsigned short *dram;
  int lines_sft_offs;
  int which_func;

  DrawLineDest = (char *)DrawLineDestBase + offs * DrawLineDestIncrement;
  dram = Pico32xMem->dram[Pico32x.vdp_regs[0x0a/2] & P32XV_FS];

  if (Pico32xDrawMode == PDM32X_BOTH) {
    if (Pico.m.dirtyPal)
      PicoDrawUpdateHighPal();
  }

  if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 2)
  {
    // Direct Color Mode
    do_loop = do_loop_dc_f;
    goto do_it;
  }

  if (Pico32x.dirty_pal)
    convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI);

  if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1)
  {
    // Packed Pixel Mode
    do_loop = do_loop_pp_f;
  }
  else
  {
    // Run Length Mode
    do_loop = do_loop_rl_f;
  }

do_it:
  if (Pico32xDrawMode == PDM32X_BOTH)
    which_func = have_scan ? DO_LOOP_MD_SCAN : DO_LOOP_MD;
  else
    which_func = have_scan ? DO_LOOP_SCAN : DO_LOOP;
  lines_sft_offs = (lines << 16) | offs;
  if (Pico32x.vdp_regs[2 / 2] & P32XV_SFT)
    lines_sft_offs |= 1 << 8;

  do_loop[which_func](DrawLineDest, dram, lines_sft_offs, md_bg);
}

// mostly unused, games tend to keep 32X layer on
void PicoDraw32xLayerMdOnly(int offs, int lines)
{
  int have_scan = PicoScan32xBegin != NULL && PicoScan32xEnd != NULL;
  unsigned short *dst = (void *)((char *)DrawLineDestBase + offs * DrawLineDestIncrement);
  unsigned char  *pmd = PicoDraw2FB + 328 * offs + 8;
  unsigned short *pal = HighPal;
  int poffs = 0, plen = 320;
  int l, p;

  if (!(Pico.video.reg[12] & 1)) {
    // 32col mode
    poffs = 32;
    plen = 256;
  }

  if (Pico.m.dirtyPal)
    PicoDrawUpdateHighPal();

  dst += poffs;
  for (l = 0; l < lines; l++) {
    if (have_scan) {
      PicoScan32xBegin(l + offs);
      dst = DrawLineDest + poffs;
    }
    for (p = 0; p < plen; p += 4) {
      dst[p + 0] = pal[*pmd++];
      dst[p + 1] = pal[*pmd++];
      dst[p + 2] = pal[*pmd++];
      dst[p + 3] = pal[*pmd++];
    }
    dst = (void *)((char *)dst + DrawLineDestIncrement);
    pmd += 328 - plen;
    if (have_scan)
      PicoScan32xEnd(l + offs);
  }
}

void PicoDraw32xSetFrameMode(int is_on, int only_32x)
{
#ifdef _ASM_32X_DRAW
  extern void *Pico32xNativePal;
  Pico32xNativePal = Pico32xMem->pal_native;
#endif

  if (is_on) {
    // use the same layout as alt renderer
    PicoDrawSetInternalBuf(PicoDraw2FB, 328);
    Pico32xDrawMode = only_32x ? PDM32X_32X_ONLY : PDM32X_BOTH;
  } else {
    PicoDrawSetInternalBuf(NULL, 0);
    Pico32xDrawMode = PDM32X_OFF;
  }
}
Commit	Line	Data
cff531af	1	/*
	2	* PicoDrive
	3	* (C) notaz, 2009,2010
	4	*
	5	* This work is licensed under the terms of MAME license.
	6	* See COPYING file in the top-level directory.
	7	*/
974fdb5b	8	#include "../pico_int.h"
974fdb5b	9
5a681086	10	int (*PicoScan32xBegin)(unsigned int num);
	11	int (*PicoScan32xEnd)(unsigned int num);
	12	int Pico32xDrawMode;
	13
5e49c3a8	14	static void convert_pal555(int invert_prio)
974fdb5b	15	{
	16	unsigned int ps = (void )Pico32xMem->pal;
	17	unsigned int pd = (void )Pico32xMem->pal_native;
	18	unsigned int m1 = 0x001f001f;
	19	unsigned int m2 = 0x03e003e0;
	20	unsigned int m3 = 0xfc00fc00;
5e49c3a8	21	unsigned int inv = 0;
974fdb5b	22	int i;
974fdb5b	23
5e49c3a8	24	if (invert_prio)
	25	inv = 0x00200020;
	26
974fdb5b	27	// place prio to LS green bit
	28	for (i = 0x100/2; i > 0; i--, ps++, pd++) {
	29	unsigned int t = *ps;
5e49c3a8	30	*pd = (((t & m1) << 11) \| ((t & m2) << 1) \| ((t & m3) >> 10)) ^ inv;
974fdb5b	31	}
	32
	33	Pico32x.dirty_pal = 0;
	34	}
	35
5a681086	36	// direct color mode
	37	#define do_line_dc(pd, p32x, pmd, inv, pmd_draw_code) \
	38	{ \
	39	const unsigned int m1 = 0x001f; \
	40	const unsigned int m2 = 0x03e0; \
	41	const unsigned int m3 = 0x7c00; \
	42	int i; \
	43	\
	44	for (i = 320; i > 0; i--, pd++, p32x++, pmd++) { \
	45	unsigned short t = *p32x; \
	46	if (*pmd != mdbg && !((t ^ inv) & 0x8000)) { \
	47	pmd_draw_code; \
	48	continue; \
	49	} \
	50	\
	51	*pd = ((t & m1) << 11) \| ((t & m2) << 1) \| ((t & m3) >> 10); \
	52	} \
	53	}
	54
	55	// packed pixel mode
	56	#define do_line_pp(pd, p32x, pmd, pmd_draw_code) \
	57	{ \
	58	unsigned short t; \
	59	int i; \
e51e5983	60	for (i = 320; i > 0; i--, pd++, p32x++, pmd++) { \
e51e5983	61	t = pal[(unsigned char )((long)p32x ^ 1)]; \
07e5dbab	62	if ((t & 0x20) \|\| *pmd == mdbg) \
5a681086	63	*pd = t; \
	64	else \
	65	pmd_draw_code; \
5a681086	66	} \
	67	}
	68
	69	// run length mode
	70	#define do_line_rl(pd, p32x, pmd, pmd_draw_code) \
	71	{ \
	72	unsigned short len, t; \
	73	int i; \
	74	for (i = 320; i > 0; p32x++) { \
	75	t = pal[*p32x & 0xff]; \
	76	for (len = (*p32x >> 8) + 1; len > 0 && i > 0; len--, i--, pd++, pmd++) { \
	77	if (*pmd == mdbg \|\| (t & 0x20)) \
	78	*pd = t; \
	79	else \
	80	pmd_draw_code; \
	81	} \
	82	} \
	83	}
	84
974fdb5b	85	void FinalizeLine32xRGB555(int sh, int line)
	86	{
	87	unsigned short *pd = DrawLineDest;
	88	unsigned short *pal = Pico32xMem->pal_native;
5a681086	89	unsigned char *pmd = HighCol + 8;
	90	unsigned short dram, p32x;
	91	unsigned char mdbg;
974fdb5b	92
5a681086	93	FinalizeLine555(sh, line);
c987bb5c	94
5a681086	95	if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 0 \|\| // 32x blanking
	96	// XXX: how is 32col mode hadled by real hardware?
	97	!(Pico.video.reg[12] & 1) \|\| // 32col mode
	98	!(PicoDrawMask & PDRAW_32X_ON))
	99	{
5e49c3a8	100	return;
5a681086	101	}
5e49c3a8	102
266c6afa	103	dram = (void *)Pico32xMem->dram[Pico32x.vdp_regs[0x0a/2] & P32XV_FS];
5a681086	104	p32x = dram + dram[line];
5a681086	105	mdbg = Pico.video.reg[7] & 0x3f;
266c6afa	106
266c6afa	107	if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 2) { // Direct Color Mode
5a681086	108	int inv_bit = (Pico32x.vdp_regs[0] & P32XV_PRI) ? 0x8000 : 0;
5a681086	109	do_line_dc(pd, p32x, pmd, inv_bit,);
266c6afa	110	return;
	111	}
	112
974fdb5b	113	if (Pico32x.dirty_pal)
5e49c3a8	114	convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI);
974fdb5b	115
266c6afa	116	if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1) { // Packed Pixel Mode
e51e5983	117	unsigned char p32xb = (void )p32x;
	118	if (Pico32x.vdp_regs[2 / 2] & P32XV_SFT)
	119	p32xb++;
	120	do_line_pp(pd, p32xb, pmd,);
974fdb5b	121	}
266c6afa	122	else { // Run Length Mode
5a681086	123	do_line_rl(pd, p32x, pmd,);
	124	}
	125	}
	126
	127	#define MD_LAYER_CODE \
	128	dst = palmd[pmd]
	129
	130	#define PICOSCAN_PRE \
e51e5983	131	PicoScan32xBegin(l + (lines_sft_offs & 0xff)); \
5a681086	132	dst = DrawLineDest; \
	133
	134	#define PICOSCAN_POST \
e51e5983	135	PicoScan32xEnd(l + (lines_sft_offs & 0xff)); \
5a681086	136
	137	#define make_do_loop(name, pre_code, post_code, md_code) \
	138	/* Direct Color Mode */ \
	139	static void do_loop_dc##name(unsigned short *dst, \
e51e5983	140	unsigned short *dram, int lines_sft_offs, int mdbg) \
5a681086	141	{ \
5a681086	142	int inv_bit = (Pico32x.vdp_regs[0] & P32XV_PRI) ? 0x8000 : 0; \
7a961c19	143	unsigned char *pmd = PicoDraw2FB + \
7a961c19	144	328 * (lines_sft_offs & 0xff) + 8; \
5a681086	145	unsigned short *palmd = HighPal; \
5a681086	146	unsigned short *p32x; \
e51e5983	147	int lines = lines_sft_offs >> 16; \
5a681086	148	int l; \
	149	(void)palmd; \
	150	for (l = 0; l < lines; l++, pmd += 8) { \
	151	pre_code; \
	152	p32x = dram + dram[l]; \
	153	do_line_dc(dst, p32x, pmd, inv_bit, md_code); \
	154	post_code; \
	155	} \
	156	} \
	157	\
	158	/* Packed Pixel Mode */ \
	159	static void do_loop_pp##name(unsigned short *dst, \
e51e5983	160	unsigned short *dram, int lines_sft_offs, int mdbg) \
5a681086	161	{ \
5a681086	162	unsigned short *pal = Pico32xMem->pal_native; \
7a961c19	163	unsigned char *pmd = PicoDraw2FB + \
7a961c19	164	328 * (lines_sft_offs & 0xff) + 8; \
5a681086	165	unsigned short *palmd = HighPal; \
e51e5983	166	unsigned char *p32x; \
e51e5983	167	int lines = lines_sft_offs >> 16; \
5a681086	168	int l; \
	169	(void)palmd; \
	170	for (l = 0; l < lines; l++, pmd += 8) { \
	171	pre_code; \
e51e5983	172	p32x = (void *)(dram + dram[l]); \
e51e5983	173	p32x += (lines_sft_offs >> 8) & 1; \
5a681086	174	do_line_pp(dst, p32x, pmd, md_code); \
	175	post_code; \
	176	} \
	177	} \
	178	\
	179	/* Run Length Mode */ \
	180	static void do_loop_rl##name(unsigned short *dst, \
e51e5983	181	unsigned short *dram, int lines_sft_offs, int mdbg) \
5a681086	182	{ \
5a681086	183	unsigned short *pal = Pico32xMem->pal_native; \
7a961c19	184	unsigned char *pmd = PicoDraw2FB + \
7a961c19	185	328 * (lines_sft_offs & 0xff) + 8; \
5a681086	186	unsigned short *palmd = HighPal; \
5a681086	187	unsigned short *p32x; \
e51e5983	188	int lines = lines_sft_offs >> 16; \
5a681086	189	int l; \
	190	(void)palmd; \
	191	for (l = 0; l < lines; l++, pmd += 8) { \
	192	pre_code; \
	193	p32x = dram + dram[l]; \
	194	do_line_rl(dst, p32x, pmd, md_code); \
	195	post_code; \
	196	} \
	197	}
	198
	199	#ifdef _ASM_32X_DRAW
	200	#undef make_do_loop
	201	#define make_do_loop(name, pre_code, post_code, md_code) \
	202	extern void do_loop_dc##name(unsigned short *dst, \
	203	unsigned short *dram, int lines_offs, int mdbg); \
	204	extern void do_loop_pp##name(unsigned short *dst, \
	205	unsigned short *dram, int lines_offs, int mdbg); \
	206	extern void do_loop_rl##name(unsigned short *dst, \
	207	unsigned short *dram, int lines_offs, int mdbg);
	208	#endif
	209
	210	make_do_loop(,,,)
	211	make_do_loop(_md, , , MD_LAYER_CODE)
	212	make_do_loop(_scan, PICOSCAN_PRE, PICOSCAN_POST, )
	213	make_do_loop(_scan_md, PICOSCAN_PRE, PICOSCAN_POST, MD_LAYER_CODE)
	214
	215	typedef void (do_loop_func)(unsigned short dst, unsigned short *dram, int lines, int mdbg);
	216	enum { DO_LOOP, DO_LOOP_MD, DO_LOOP_SCAN, DO_LOOP_MD_SCAN };
	217
	218	static const do_loop_func do_loop_dc_f[] = { do_loop_dc, do_loop_dc_md, do_loop_dc_scan, do_loop_dc_scan_md };
	219	static const do_loop_func do_loop_pp_f[] = { do_loop_pp, do_loop_pp_md, do_loop_pp_scan, do_loop_pp_scan_md };
	220	static const do_loop_func do_loop_rl_f[] = { do_loop_rl, do_loop_rl_md, do_loop_rl_scan, do_loop_rl_scan_md };
	221
	222	void PicoDraw32xLayer(int offs, int lines, int md_bg)
	223	{
	224	int have_scan = PicoScan32xBegin != NULL && PicoScan32xEnd != NULL;
	225	const do_loop_func *do_loop;
	226	unsigned short *dram;
e51e5983	227	int lines_sft_offs;
5a681086	228	int which_func;
5a681086	229
7a961c19	230	DrawLineDest = (char )DrawLineDestBase + offs DrawLineDestIncrement;
5a681086	231	dram = Pico32xMem->dram[Pico32x.vdp_regs[0x0a/2] & P32XV_FS];
5a681086	232
7a961c19	233	if (Pico32xDrawMode == PDM32X_BOTH) {
5a681086	234	if (Pico.m.dirtyPal)
	235	PicoDrawUpdateHighPal();
	236	}
	237
	238	if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 2)
	239	{
	240	// Direct Color Mode
	241	do_loop = do_loop_dc_f;
	242	goto do_it;
	243	}
	244
	245	if (Pico32x.dirty_pal)
	246	convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI);
	247
	248	if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1)
	249	{
	250	// Packed Pixel Mode
	251	do_loop = do_loop_pp_f;
	252	}
	253	else
	254	{
	255	// Run Length Mode
	256	do_loop = do_loop_rl_f;
	257	}
	258
	259	do_it:
7a961c19	260	if (Pico32xDrawMode == PDM32X_BOTH)
5a681086	261	which_func = have_scan ? DO_LOOP_MD_SCAN : DO_LOOP_MD;
	262	else
	263	which_func = have_scan ? DO_LOOP_SCAN : DO_LOOP;
e51e5983	264	lines_sft_offs = (lines << 16) \| offs;
	265	if (Pico32x.vdp_regs[2 / 2] & P32XV_SFT)
	266	lines_sft_offs \|= 1 << 8;
5a681086	267
e51e5983	268	do_loop[which_func](DrawLineDest, dram, lines_sft_offs, md_bg);
5a681086	269	}
5a681086	270
7a961c19	271	// mostly unused, games tend to keep 32X layer on
	272	void PicoDraw32xLayerMdOnly(int offs, int lines)
	273	{
	274	int have_scan = PicoScan32xBegin != NULL && PicoScan32xEnd != NULL;
	275	unsigned short dst = (void )((char )DrawLineDestBase + offs DrawLineDestIncrement);
	276	unsigned char pmd = PicoDraw2FB + 328 offs + 8;
	277	unsigned short *pal = HighPal;
	278	int poffs = 0, plen = 320;
	279	int l, p;
	280
	281	if (!(Pico.video.reg[12] & 1)) {
	282	// 32col mode
	283	poffs = 32;
	284	plen = 256;
	285	}
	286
	287	if (Pico.m.dirtyPal)
	288	PicoDrawUpdateHighPal();
	289
	290	dst += poffs;
	291	for (l = 0; l < lines; l++) {
	292	if (have_scan) {
	293	PicoScan32xBegin(l + offs);
	294	dst = DrawLineDest + poffs;
	295	}
	296	for (p = 0; p < plen; p += 4) {
	297	dst[p + 0] = pal[*pmd++];
	298	dst[p + 1] = pal[*pmd++];
	299	dst[p + 2] = pal[*pmd++];
	300	dst[p + 3] = pal[*pmd++];
	301	}
	302	dst = (void )((char )dst + DrawLineDestIncrement);
	303	pmd += 328 - plen;
	304	if (have_scan)
	305	PicoScan32xEnd(l + offs);
	306	}
	307	}
	308
5a681086	309	void PicoDraw32xSetFrameMode(int is_on, int only_32x)
	310	{
	311	#ifdef _ASM_32X_DRAW
	312	extern void *Pico32xNativePal;
	313	Pico32xNativePal = Pico32xMem->pal_native;
	314	#endif
	315
	316	if (is_on) {
	317	// use the same layout as alt renderer
a2b8c5a5	318	PicoDrawSetInternalBuf(PicoDraw2FB, 328);
7a961c19	319	Pico32xDrawMode = only_32x ? PDM32X_32X_ONLY : PDM32X_BOTH;
5a681086	320	} else {
5a681086	321	PicoDrawSetInternalBuf(NULL, 0);
7a961c19	322	Pico32xDrawMode = PDM32X_OFF;
266c6afa	323	}
974fdb5b	324	}
974fdb5b	325