RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 07:17:45 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

gfx_cd optimization wip, line glitch fixed

Browse source 
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@75 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-03-22 20:54:17 +00:00
parent 01bc6b1993
commit 528ec9568f
2 changed files with 33 additions and 44 deletions
Download patch file Download diff file Expand all files Collapse all files

66
Pico/cd/gfx_cd.c
View file

@ -35,9 +35,9 @@ static void gfx_cd_start(void)
dprintf("gfx_cd_start()");
rot_comp.XD_Mul = ((rot_comp.Reg_5C & 0x1f) + 1) * 4;
// 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;
// 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;
@ -81,24 +81,25 @@ static void gfx_completed(void)
static void gfx_do(void)
{
unsigned int eax, ebx, ecx, edx, esi, edi, pixel = 0;
unsigned int eax, ebx, ecx, edx, esi, edi, pixel;
unsigned int XD, Buffer_Adr, H_Dot;
unsigned int func = rot_comp.Function;
unsigned short *ptrs;
unsigned short *stamp_base;
int DYXS;
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;
XD = rot_comp.Reg_60 & 7;
Buffer_Adr = ((rot_comp.Reg_5E & 0xfff8) + rot_comp.YD) << 2;
stamp_base = (unsigned short *) (Pico_mcd->word_ram2M + rot_comp.Stamp_Map_Adr);
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
DYXS = *(int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr + 4);
rot_comp.Vector_Adr += 8;
// MAKE_IMAGE_LINE
while (rot_comp.H_Dot)
while (H_Dot)
{
if (func & 2) // mode 32x32 dot
{
@ -128,26 +129,24 @@ static void gfx_do(void)
}
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
int mask = (func & 4) ? 0x00800000 : 0x00f80000;
if ((ecx | edx) & mask)
{
if ((edx & 0x00800000) || (ecx & 0x00800000)) goto Pixel_Out;
}
else // 1x1 screen
{
if ((edx & 0x00f80000) || (ecx & 0x00f80000)) goto Pixel_Out;
if (func & 0x18) goto Next_Pixel;
pixel = 0;
goto Pixel_Out;
}
}
// esi = rot_comp.Stamp_Map_Adr;
edi = stamp_base[ebx] | (stamp_base[ebx+1] << 16);
esi = edi;
edi >>= (11+1);
esi = (esi & 0x7ff) << 7;
if (!esi) goto Pixel_Out;
if (!esi) { pixel = 0; goto Pixel_Out; }
edi &= (0x1c>>1);
eax = ecx;
ebx = edx;
@ -254,15 +253,13 @@ static void gfx_do(void)
pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
if (!(edi & 0x800)) pixel >>= 4;
else pixel &= 0x0f;
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
esi = Buffer_Adr + ((XD>>1)^1); // pixel addr
eax = *(Pico_mcd->word_ram2M + esi); // old pixel
if (rot_comp.XD & 1)
if (XD & 1)
{
if ((eax & 0x0f) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
*(Pico_mcd->word_ram2M + esi) = pixel | (eax & 0xf0);
@ -275,16 +272,17 @@ Pixel_Out:
Next_Pixel:
ecx += rot_comp.DXS;
edx += rot_comp.DYS;
rot_comp.XD++;
if (rot_comp.XD >= 8)
ecx += (DYXS << 16) >> 16; // rot_comp.DXS;
edx += DYXS >> 16; // rot_comp.DYS;
XD++;
if (XD >= 8)
{
rot_comp.Buffer_Adr += ((rot_comp.Reg_5C & 0x1f) + 1) << 5;
rot_comp.XD = 0;
Buffer_Adr += ((rot_comp.Reg_5C & 0x1f) + 1) << 5;
XD = 0;
}
rot_comp.H_Dot--;
H_Dot--;
}
// end while
//nothing_to_draw:

11
Pico/cd/gfx_cd.h
View file

@ -14,22 +14,13 @@ typedef struct
unsigned int Reg_66;
unsigned int Stamp_Map_Adr;
unsigned int Buffer_Adr;
unsigned int Vector_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 XD;
unsigned int YD;
unsigned int XD_Mul;
unsigned int H_Dot;
int pad[2];
int pad[10];
} Rot_Comp;