unsigned int Stamp_Map_Adr;
unsigned int Buffer_Adr;
unsigned int Vector_Adr;
- unsigned int Jmp_Adr;
+ unsigned int Function; // Jmp_Adr;
unsigned int Float_Part;
unsigned int Draw_Speed;
unsigned int XS;
unsigned int YS;
- unsigned int DXS;
- unsigned int DYS;
+ /*unsigned*/ int DXS;
+ /*unsigned*/ int DYS;
unsigned int XD;
unsigned int YD;
unsigned int XD_Mul;
dprintf("gfx_cd_start()");
+ rot_comp.XD_Mul = ((rot_comp.Reg_5C & 0x1f) + 1) * 4;
+ 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;
+ 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;
+ }
+
gfx_cd_update();
}
}
-//static void gfx_do(void)
-//{
-//}
+static void gfx_do(void)
+{
+ unsigned int eax, ebx, ecx, edx, esi, edi, pixel = 0;
+ unsigned int func = rot_comp.Function;
+ unsigned short *ptrs;
+
+ rot_comp.XD = rot_comp.Reg_60 & 7;
+ rot_comp.Buffer_Adr = ((rot_comp.Reg_5E & 0xfff8) + rot_comp.YD) << 2;
+ rot_comp.H_Dot = rot_comp.Reg_62 & 0x1ff;
+ ecx = *(unsigned int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr);
+ edx = ecx >> 16;
+ ecx = (ecx & 0xffff) << 8;
+ edx <<= 8;
+ rot_comp.DXS = *(int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr + 4);
+ rot_comp.DYS = rot_comp.DXS >> 16;
+ rot_comp.DXS = (rot_comp.DXS << 16) >> 16; // sign extend
+ rot_comp.Vector_Adr += 8;
+ //if ((rot_comp.H_Dot & 0x1ff) == 0)
+ // goto nothing_to_draw;
+
+ // MAKE_IMAGE_LINE
+ while (rot_comp.H_Dot)
+ {
+ if (func & 2) // mode 32x32 dot
+ {
+ if (func & 4) // 16x16 screen
+ {
+ eax = (ecx >> (11+5)) & 0x7f;
+ ebx = (edx >> (11-2)) & 0x3f80;
+ }
+ else // 1x1 screen
+ {
+ eax = (ecx >> (11+5)) & 0x0f;
+ ebx = (edx >> (11+2)) & 0x38;
+ }
+ }
+ else // mode 16x16 dot
+ {
+ if (func & 4) // 16x16 screen
+ {
+ eax = (ecx >> (11+4)) & 0xff;
+ ebx = (edx >> (11-4)) & 0xff00;
+ }
+ else // 1x1 screen
+ {
+ eax = (ecx >> (11+4)) & 0x0f;
+ ebx = (edx >> (11+0)) & 0xf0;
+ }
+ }
+ ebx += eax;
+
+ esi = rot_comp.Stamp_Map_Adr;
+ ptrs = (unsigned short *) (Pico_mcd->word_ram2M + rot_comp.Stamp_Map_Adr + ebx*2);
+ edi = ptrs[0] | (ptrs[1] << 16);
+
+ // MAKE_IMAGE_PIXEL
+ if (!(func & 1)) // NOT TILED
+ {
+ if (func & 4) // 16x16 screen
+ {
+ if ((edx & 0x00800000) || (ecx & 0x00800000)) goto Pixel_Out;
+ }
+ else // 1x1 screen
+ {
+ if ((edx & 0x00f80000) || (ecx & 0x00f80000)) goto Pixel_Out;
+ }
+ }
+ esi = edi;
+ edi >>= (11+1);
+ esi = (esi & 0x7ff) << 7;
+ if (!esi) goto Pixel_Out;
+ 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;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ break;
+ case 0x01: // No_Flip_0, 32x32 dots
+ ebx = (ebx >> 9) & 0x7c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x1000; // bswap
+ eax = ((eax >> 7) & 0x180) + ebx;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ break;
+ case 0x02: // No_Flip_90, 16x16 dots
+ eax = (eax >> 9) & 0x3c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x2800; // bswap
+ eax += ((ebx >> 8) & 0x40) ^ 0x40;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ break;
+ case 0x03: // No_Flip_90, 32x32 dots
+ eax = (eax >> 9) & 0x7c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x2800; // bswap
+ eax += (ebx >> 7) & 0x180;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ 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;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ 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;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ break;
+ case 0x06: // No_Flip_270, 16x16 dots
+ eax = ((eax >> 9) & 0x3c) ^ 0x3c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x1000; // bswap
+ eax += (ebx >> 8) & 0x40;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ break;
+ case 0x07: // No_Flip_270, 32x32 dots
+ eax = ((eax >> 9) & 0x7c) ^ 0x7c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x1000; // bswap
+ eax += (ebx >> 7) & 0x180;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ break;
+ case 0x08: // Flip_0, 16x16 dots
+ ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x2800; // bswap, flip
+ eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ break;
+ case 0x09: // Flip_0, 32x32 dots
+ ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x2800; // bswap, flip
+ eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ 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;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ 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;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ break;
+ case 0x0c: // Flip_180, 16x16 dots
+ ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x1000; // bswap
+ eax = ((eax >> 8) & 0x40) + ebx;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ break;
+ case 0x0d: // Flip_180, 32x32 dots
+ ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x1000; // bswap
+ eax = ((eax >> 7) & 0x180) + ebx;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ break;
+ case 0x0e: // Flip_270, 16x16 dots
+ eax = (eax >> 9) & 0x3c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x1000; // bswap, flip
+ eax += (ebx >> 8) & 0x40;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ break;
+ case 0x0f: // Flip_270, 32x32 dots
+ eax = (eax >> 9) & 0x7c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x1000; // bswap, flip
+ eax += (ebx >> 7) & 0x180;
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ break;
+ }
+
+Pixel_Out:
+// pixel = 0;
+//Finish:
+ pixel &= 0x0f;
+ if (!pixel && (func & 0x18)) goto Next_Pixel;
+ esi = rot_comp.Buffer_Adr + ((rot_comp.XD>>1)^1); // pixel addr
+ eax = *(Pico_mcd->word_ram2M + esi); // old pixel
+ if (rot_comp.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 += rot_comp.DXS;
+ edx += rot_comp.DYS;
+ rot_comp.XD++;
+ if (rot_comp.XD >= 8)
+ {
+ rot_comp.Buffer_Adr += ((rot_comp.Reg_5C & 0x1f) + 1) << 5;
+ rot_comp.XD = 0;
+ }
+ rot_comp.H_Dot--;
+ }
+
+
+//nothing_to_draw:
+ rot_comp.YD++;
+ // rot_comp.V_Dot--; // will be done by caller
+}
void gfx_cd_update(void)
if (!*V_Dot)
{
- // ...
gfx_completed();
return;
}
while (jobs--)
{
- // jmp [Jmp_Adr]:
- (*V_Dot)--; // dec byte [V_Dot]
+ if (PicoOpt & 0x1000)
+ gfx_do(); // jmp [Jmp_Adr]:
+
+ (*V_Dot)--; // dec byte [V_Dot]
if (!*V_Dot)
{
notaz.gp2x.de / picodrive.git / blobdiff