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NES NameTableViewer - pre read the ppubus before looping. About a 7 fps increase in speed on my machine at the highest refresh rate.

This commit is contained in:
andres.delikat 2011-09-04 03:14:42 +00:00
parent 35d0ad1b31
commit 04b5cafe3a
1 changed files with 6 additions and 5 deletions
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11
BizHawk.MultiClient/NEStools/NESNameTableViewer.cs
View File

@ -43,7 +43,7 @@ namespace BizHawk.MultiClient
if (Nes == null) return;
if (Global.Emulator.Frame % RefreshRate.Value != 0) return;
BitmapData bmpdata = NameTableView.nametables.LockBits(new Rectangle(0, 0, 512, 480), ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
int* dptr = (int*)bmpdata.Scan0.ToPointer();
@ -51,7 +51,9 @@ namespace BizHawk.MultiClient
int pt_add = Nes.ppu.reg_2000.bg_pattern_hi ? 0x1000 : 0;
//TODO - buffer all the data from the ppu, because it will be read multiple times and that is slow
int[] p = new int[0x1000];
for (int x = 0; x < 0x1000; x++)
p[x] = Nes.ppu.ppubus_peek(0x2000 + x);
int ytable = 0, yline = 0;
for (int y = 0; y < 480; y++)
{
@ -70,9 +72,9 @@ namespace BizHawk.MultiClient
int ty = py >> 3;
int ntbyte_ptr = ntaddr + (ty * 32) + tx;
int atbyte_ptr = ntaddr + 0x3C0 + ((ty >> 2) << 3) + (tx >> 2);
int nt = Nes.ppu.ppubus_peek(ntbyte_ptr + 0x2000);
int nt = p[ntbyte_ptr];
int at = Nes.ppu.ppubus_peek(atbyte_ptr + 0x2000);
int at = p[atbyte_ptr];
if ((ty & 2) != 0) at >>= 4;
if ((tx & 2) != 0) at >>= 2;
at &= 0x03;
@ -98,7 +100,6 @@ namespace BizHawk.MultiClient
}
NameTableView.nametables.UnlockBits(bmpdata);
NameTableView.Refresh();
}