X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2Fcd%2Fgfx_cd.c;h=630109c9c37ca2e89ecdaec6a39179cc910e19dc;hb=eff55556cff77fd64cff4be32e449e0a58aed6fe;hp=f104f69f4aafd1ef464b84ee7b9e347ba7c02390;hpb=cb4a513a96b173624619686ca21360d556557ec3;p=picodrive.git

diff --git a/Pico/cd/gfx_cd.c b/Pico/cd/gfx_cd.c
index f104f69..630109c 100644
--- a/Pico/cd/gfx_cd.c
+++ b/Pico/cd/gfx_cd.c
@@ -1,11 +1,80 @@
-// TODO...
+// This is a direct rewrite of gfx_cd.asm (x86 asm to C).
+// You can even find some x86 register names :)
+// Original code (c) 2002 by Stéphane Dallongeville
+
+// (c) Copyright 2007, Grazvydas "notaz" Ignotas
+
 
 #include "../PicoInt.h"
 
+#define _rot_comp Pico_mcd->rot_comp
+
+static const int Table_Rot_Time[] =
+{
+	0x00054000, 0x00048000, 0x00040000, 0x00036000,          //; 008-032               ; briefing - sprite
+	0x0002E000, 0x00028000, 0x00024000, 0x00022000,          //; 036-064               ; arbre souvent
+	0x00021000, 0x00020000, 0x0001E000, 0x0001B800,          //; 068-096               ; map thunderstrike
+	0x00019800, 0x00017A00, 0x00015C00, 0x00013E00,          //; 100-128               ; logo défoncé
+
+	0x00012000, 0x00011800, 0x00011000, 0x00010800,          //; 132-160               ; briefing - map
+	0x00010000, 0x0000F800, 0x0000F000, 0x0000E800,          //; 164-192
+	0x0000E000, 0x0000D800, 0x0000D000, 0x0000C800,          //; 196-224
+	0x0000C000, 0x0000B800, 0x0000B000, 0x0000A800,          //; 228-256               ; batman visage
+
+	0x0000A000, 0x00009F00, 0x00009E00, 0x00009D00,          //; 260-288
+	0x00009C00, 0x00009B00, 0x00009A00, 0x00009900,          //; 292-320
+	0x00009800, 0x00009700, 0x00009600, 0x00009500,          //; 324-352
+	0x00009400, 0x00009300, 0x00009200, 0x00009100,          //; 356-384
+
+	0x00009000, 0x00008F00, 0x00008E00, 0x00008D00,          //; 388-416
+	0x00008C00, 0x00008B00, 0x00008A00, 0x00008900,          //; 420-448
+	0x00008800, 0x00008700, 0x00008600, 0x00008500,          //; 452-476
+	0x00008400, 0x00008300, 0x00008200, 0x00008100,          //; 480-512
+};
+
 
 static void gfx_cd_start(void)
 {
-		dprintf("gfx_cd_start()");
+	int upd_len;
+
+	// _rot_comp.XD_Mul = ((_rot_comp.Reg_5C & 0x1f) + 1) * 4; // unused
+	_rot_comp.Function = (_rot_comp.Reg_58 & 7) | (Pico_mcd->s68k_regs[3] & 0x18);	// Jmp_Adr
+	// _rot_comp.Buffer_Adr = (_rot_comp.Reg_5E & 0xfff8) << 2; // unused?
+	_rot_comp.YD = (_rot_comp.Reg_60 >> 3) & 7;
+	_rot_comp.Vector_Adr = (_rot_comp.Reg_66 & 0xfffe) << 2;
+
+	upd_len = (_rot_comp.Reg_62 >> 3) & 0x3f;
+	upd_len = Table_Rot_Time[upd_len];
+	_rot_comp.Draw_Speed = _rot_comp.Float_Part = upd_len;
+
+	_rot_comp.Reg_58 |= 0x8000;	// Stamp_Size,  we start a new GFX operation
+
+	switch (_rot_comp.Reg_58 & 6)	// Scr_16?
+	{
+		case 0:	// ?
+			_rot_comp.Stamp_Map_Adr = (_rot_comp.Reg_5A & 0xff80) << 2;
+			break;
+		case 2: // .Dot_32
+			_rot_comp.Stamp_Map_Adr = (_rot_comp.Reg_5A & 0xffe0) << 2;
+			break;
+		case 4: // .Scr_16
+			_rot_comp.Stamp_Map_Adr = 0x20000;
+			break;
+		case 6: // .Scr_16_Dot_32
+			_rot_comp.Stamp_Map_Adr = (_rot_comp.Reg_5A & 0xe000) << 2;
+			break;
+	}
+
+	dprintf("gfx_cd_start, stamp_map_addr=%06x", _rot_comp.Stamp_Map_Adr);
+
+	gfx_cd_update();
+}
+
+
+static void gfx_completed(void)
+{
+	_rot_comp.Reg_58 &= 0x7fff;	// Stamp_Size
+	_rot_comp.Reg_64  = 0;
 	if (Pico_mcd->s68k_regs[0x33] & (1<<1))
 	{
 		dprintf("gfx_cd irq 1");
@@ -13,30 +82,408 @@ static void gfx_cd_start(void)
 	}
 }
 
-void gfx_cd_update(void)
+
+static void gfx_do(unsigned int func, unsigned short *stamp_base, unsigned int H_Dot)
 {
+	unsigned int eax, ebx, ecx, edx, esi, edi, pixel;
+	unsigned int XD, Buffer_Adr;
+	int DYXS;
+
+	XD = _rot_comp.Reg_60 & 7;
+	Buffer_Adr = ((_rot_comp.Reg_5E & 0xfff8) + _rot_comp.YD) << 2;
+	ecx = *(unsigned int *)(Pico_mcd->word_ram2M + _rot_comp.Vector_Adr);
+	edx = ecx >> 16;
+	ecx = (ecx & 0xffff) << 8;
+	edx <<= 8;
+	DYXS = *(int *)(Pico_mcd->word_ram2M + _rot_comp.Vector_Adr + 4);
+	_rot_comp.Vector_Adr += 8;
+
+	// MAKE_IMAGE_LINE
+	while (H_Dot)
+	{
+		// MAKE_IMAGE_PIXEL
+		if (!(func & 1))	// NOT TILED
+		{
+			int mask = (func & 4) ? 0x00800000 : 0x00f80000;
+			if ((ecx | edx) & mask)
+			{
+				if (func & 0x18) goto Next_Pixel;
+				pixel = 0;
+				goto Pixel_Out;
+			}
+		}
+
+		if (func & 2)		// mode 32x32 dot
+		{
+			if (func & 4)	// 16x16 screen
+			{
+				ebx = ((ecx >> (11+5)) & 0x007f) |
+				      ((edx >> (11-2)) & 0x3f80);
+			}
+			else		// 1x1 screen
+			{
+				ebx = ((ecx >> (11+5)) & 0x07) |
+				      ((edx >> (11+2)) & 0x38);
+			}
+		}
+		else			// mode 16x16 dot
+		{
+			if (func & 4)	// 16x16 screen
+			{
+				ebx = ((ecx >> (11+4)) & 0x00ff) |
+				      ((edx >> (11-4)) & 0xff00);
+			}
+			else		// 1x1 screen
+			{
+				ebx = ((ecx >> (11+4)) & 0x0f) |
+				      ((edx >> (11+0)) & 0xf0);
+			}
+		}
+
+		edi = stamp_base[ebx];
+		esi = (edi & 0x7ff) << 7;
+		if (!esi) { pixel = 0; goto Pixel_Out; }
+		edi >>= (11+1);
+		edi &= (0x1c>>1);
+		eax = ecx;
+		ebx = edx;
+		if (func & 2) edi |= 1;	// 32 dots?
+		switch (edi)
+		{
+			case 0x00:	// No_Flip_0, 16x16 dots
+				ebx = (ebx >> 9) & 0x3c;
+				ebx += esi;
+				edi = (eax & 0x3800) ^ 0x1000;		// bswap
+				eax = ((eax >> 8) & 0x40) + ebx;
+				break;
+			case 0x01:	// No_Flip_0, 32x32 dots
+				ebx = (ebx >> 9) & 0x7c;
+				ebx += esi;
+				edi = (eax & 0x3800) ^ 0x1000;		// bswap
+				eax = ((eax >> 7) & 0x180) + ebx;
+				break;
+			case 0x02:	// No_Flip_90, 16x16 dots
+				eax = (eax >> 9) & 0x3c;
+				eax += esi;
+				edi = (ebx & 0x3800) ^ 0x2800;		// bswap
+				eax += ((ebx >> 8) & 0x40) ^ 0x40;
+				break;
+			case 0x03:	// No_Flip_90, 32x32 dots
+				eax = (eax >> 9) & 0x7c;
+				eax += esi;
+				edi = (ebx & 0x3800) ^ 0x2800;		// bswap
+				eax += ((ebx >> 7) & 0x180) ^ 0x180;
+				break;
+			case 0x04:	// No_Flip_180, 16x16 dots
+				ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
+				ebx += esi;
+				edi = (eax & 0x3800) ^ 0x2800;		// bswap and flip
+				eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
+				break;
+			case 0x05:	// No_Flip_180, 32x32 dots
+				ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
+				ebx += esi;
+				edi = (eax & 0x3800) ^ 0x2800;		// bswap and flip
+				eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
+				break;
+			case 0x06:	// No_Flip_270, 16x16 dots
+				eax = ((eax >> 9) & 0x3c) ^ 0x3c;
+				eax += esi;
+				edi = (ebx & 0x3800) ^ 0x1000;		// bswap
+				eax += (ebx >> 8) & 0x40;
+				break;
+			case 0x07:	// No_Flip_270, 32x32 dots
+				eax = ((eax >> 9) & 0x7c) ^ 0x7c;
+				eax += esi;
+				edi = (ebx & 0x3800) ^ 0x1000;		// bswap
+				eax += (ebx >> 7) & 0x180;
+				break;
+			case 0x08:	// Flip_0, 16x16 dots
+				ebx = (ebx >> 9) & 0x3c;
+				ebx += esi;
+				edi = (eax & 0x3800) ^ 0x2800;		// bswap, flip
+				eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
+				break;
+			case 0x09:	// Flip_0, 32x32 dots
+				ebx = (ebx >> 9) & 0x7c;
+				ebx += esi;
+				edi = (eax & 0x3800) ^ 0x2800;		// bswap, flip
+				eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
+				break;
+			case 0x0a:	// Flip_90, 16x16 dots
+				eax = ((eax >> 9) & 0x3c) ^ 0x3c;
+				eax += esi;
+				edi = (ebx & 0x3800) ^ 0x2800;		// bswap, flip
+				eax += ((ebx >> 8) & 0x40) ^ 0x40;
+				break;
+			case 0x0b:	// Flip_90, 32x32 dots
+				eax = ((eax >> 9) & 0x7c) ^ 0x7c;
+				eax += esi;
+				edi = (ebx & 0x3800) ^ 0x2800;		// bswap, flip
+				eax += ((ebx >> 7) & 0x180) ^ 0x180;
+				break;
+			case 0x0c:	// Flip_180, 16x16 dots
+				ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
+				ebx += esi;
+				edi = (eax & 0x3800) ^ 0x1000;		// bswap
+				eax = ((eax >> 8) & 0x40) + ebx;
+				break;
+			case 0x0d:	// Flip_180, 32x32 dots
+				ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
+				ebx += esi;
+				edi = (eax & 0x3800) ^ 0x1000;		// bswap
+				eax = ((eax >> 7) & 0x180) + ebx;
+				break;
+			case 0x0e:	// Flip_270, 16x16 dots
+				eax = (eax >> 9) & 0x3c;
+				eax += esi;
+				edi = (ebx & 0x3800) ^ 0x1000;		// bswap, flip
+				eax += (ebx >> 8) & 0x40;
+				break;
+			case 0x0f:	// Flip_270, 32x32 dots
+				eax = (eax >> 9) & 0x7c;
+				eax += esi;
+				edi = (ebx & 0x3800) ^ 0x1000;		// bswap, flip
+				eax += (ebx >> 7) & 0x180;
+				break;
+		}
+
+		pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+		if (!(edi & 0x800)) pixel >>= 4;
+		else pixel &= 0x0f;
+
+Pixel_Out:
+		if (!pixel && (func & 0x18)) goto Next_Pixel;
+		esi = Buffer_Adr + ((XD>>1)^1);				// pixel addr
+		eax = *(Pico_mcd->word_ram2M + esi);			// old pixel
+		if (XD & 1)
+		{
+			if ((eax & 0x0f) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
+			*(Pico_mcd->word_ram2M + esi) = pixel | (eax & 0xf0);
+		}
+		else
+		{
+			if ((eax & 0xf0) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
+			*(Pico_mcd->word_ram2M + esi) = (pixel << 4) | (eax & 0xf);
+		}
+
+
+Next_Pixel:
+		ecx += (DYXS << 16) >> 16;	// _rot_comp.DXS;
+		edx +=  DYXS >> 16;		// _rot_comp.DYS;
+		XD++;
+		if (XD >= 8)
+		{
+			Buffer_Adr += ((_rot_comp.Reg_5C & 0x1f) + 1) << 5;
+			XD = 0;
+		}
+		H_Dot--;
+	}
+	// end while
+
+
+// nothing_to_draw:
+	_rot_comp.YD++;
+	// _rot_comp.V_Dot--; // will be done by caller
 }
 
 
-unsigned int gfx_cd_read(unsigned int a)
+PICO_INTERNAL void gfx_cd_update(void)
 {
-	dprintf("gfx_cd_read(%x)", a);
+	int V_Dot = _rot_comp.Reg_64 & 0xff;
+	int jobs;
+
+	dprintf("gfx_cd_update, Reg_64 = %04x", _rot_comp.Reg_64);
+
+	if (!V_Dot)
+	{
+		gfx_completed();
+		return;
+	}
+
+	jobs = _rot_comp.Float_Part >> 16;
+
+	if (!jobs)
+	{
+		_rot_comp.Float_Part += _rot_comp.Draw_Speed;
+		return;
+	}
+
+	_rot_comp.Float_Part &= 0xffff;
+	_rot_comp.Float_Part += _rot_comp.Draw_Speed;
+
+	if (PicoOpt & 0x1000)			// scale/rot enabled
+	{
+		unsigned int func = _rot_comp.Function;
+		unsigned int H_Dot = _rot_comp.Reg_62 & 0x1ff;
+		unsigned short *stamp_base = (unsigned short *) (Pico_mcd->word_ram2M + _rot_comp.Stamp_Map_Adr);
+
+		while (jobs--)
+		{
+			gfx_do(func, stamp_base, H_Dot);	// jmp [Jmp_Adr]:
 
-//	switch (a) {
-//		case 2:
-//			return;
-	return 0;
+			V_Dot--;				// dec byte [V_Dot]
+			if (V_Dot == 0)
+			{
+				// GFX_Completed:
+				gfx_completed();
+				return;
+			}
+		}
+	}
+	else
+	{
+		if (jobs >= V_Dot)
+		{
+			gfx_completed();
+			return;
+		}
+		V_Dot -= jobs;
+	}
+
+	_rot_comp.Reg_64 = V_Dot;
+}
+
+
+PICO_INTERNAL_ASM unsigned int gfx_cd_read(unsigned int a)
+{
+	unsigned int d = 0;
+
+	switch (a) {
+		case 0x58: d = _rot_comp.Reg_58; break;
+		case 0x5A: d = _rot_comp.Reg_5A; break;
+		case 0x5C: d = _rot_comp.Reg_5C; break;
+		case 0x5E: d = _rot_comp.Reg_5E; break;
+		case 0x60: d = _rot_comp.Reg_60; break;
+		case 0x62: d = _rot_comp.Reg_62; break;
+		case 0x64: d = _rot_comp.Reg_64; break;
+		case 0x66: break;
+		default: dprintf("gfx_cd_read FIXME: unexpected address: %02x", a); break;
+	}
+
+	dprintf("gfx_cd_read(%02x) = %04x", a, d);
+
+	return d;
 }
 
-void gfx_cd_write(unsigned int a, unsigned int d)
+PICO_INTERNAL_ASM void gfx_cd_write16(unsigned int a, unsigned int d)
 {
-	dprintf("gfx_cd_write(%x, %04x)", a, d);
+	dprintf("gfx_cd_write16(%x, %04x)", a, d);
 
 	switch (a) {
-		case 0x66:
+		case 0x58: // .Reg_Stamp_Size
+			_rot_comp.Reg_58 = d & 7;
+			return;
+
+		case 0x5A: // .Reg_Stamp_Adr
+			_rot_comp.Reg_5A = d & 0xffe0;
+			return;
+
+		case 0x5C: // .Reg_IM_VCell_Size
+			_rot_comp.Reg_5C = d & 0x1f;
+			return;
+
+		case 0x5E: // .Reg_IM_Adr
+			_rot_comp.Reg_5E = d & 0xFFF8;
+			return;
+
+		case 0x60: // .Reg_IM_Offset
+			_rot_comp.Reg_60 = d & 0x3f;
+			return;
+
+		case 0x62: // .Reg_IM_HDot_Size
+			_rot_comp.Reg_62 = d & 0x1ff;
+			return;
+
+		case 0x64: // .Reg_IM_VDot_Size
+			_rot_comp.Reg_64 = d & 0xff;	// V_Dot, must be 32bit?
+			return;
+
+		case 0x66: // .Reg_Vector_Adr
+			_rot_comp.Reg_66 = d & 0xfffe;
 			if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
 			gfx_cd_start();
 			return;
+
+		default: dprintf("gfx_cd_write16 FIXME: unexpected address: %02x", a); return;
 	}
 }
 
+
+PICO_INTERNAL void gfx_cd_reset(void)
+{
+	memset(&_rot_comp.Reg_58, 0, sizeof(_rot_comp));
+}
+
+
+// --------------------------------
+
+#include "cell_map.c"
+
+#ifndef UTYPES_DEFINED
+typedef unsigned short u16;
+#endif
+
+// check: Heart of the alien, jaguar xj 220
+PICO_INTERNAL void DmaSlowCell(unsigned int source, unsigned int a, int len, unsigned char inc)
+{
+  unsigned char *base;
+  unsigned int asrc, a2;
+  u16 *r;
+
+  base = Pico_mcd->word_ram1M[Pico_mcd->s68k_regs[3]&1];
+
+  switch (Pico.video.type)
+  {
+    case 1: // vram
+      r = Pico.vram;
+      for(; len; len--)
+      {
+        asrc = cell_map(source >> 2) << 2;
+        asrc |= source & 2;
+        // if(a&1) d=(d<<8)|(d>>8); // ??
+        r[a>>1] = *(u16 *)(base + asrc);
+	source += 2;
+        // AutoIncrement
+        a=(u16)(a+inc);
+      }
+      rendstatus|=0x10;
+      break;
+
+    case 3: // cram
+      Pico.m.dirtyPal = 1;
+      r = Pico.cram;
+      for(a2=a&0x7f; len; len--)
+      {
+        asrc = cell_map(source >> 2) << 2;
+        asrc |= source & 2;
+        r[a2>>1] = *(u16 *)(base + asrc);
+	source += 2;
+        // AutoIncrement
+        a2+=inc;
+        // good dest?
+        if(a2 >= 0x80) break;
+      }
+      a=(a&0xff00)|a2;
+      break;
+
+    case 5: // vsram[a&0x003f]=d;
+      r = Pico.vsram;
+      for(a2=a&0x7f; len; len--)
+      {
+        asrc = cell_map(source >> 2) << 2;
+        asrc |= source & 2;
+        r[a2>>1] = *(u16 *)(base + asrc);
+	source += 2;
+        // AutoIncrement
+        a2+=inc;
+        // good dest?
+        if(a2 >= 0x80) break;
+      }
+      a=(a&0xff00)|a2;
+      break;
+  }
+  // remember addr
+  Pico.video.addr=(u16)a;
+}
+