mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-09-10 09:48:51 +02:00
144 lines
3.5 KiB
C#
144 lines
3.5 KiB
C#
using System;
|
|
|
|
namespace Ryujinx.Graphics.Gal.Texture
|
|
{
|
|
class SwizzleAddr
|
|
{
|
|
private int Width;
|
|
|
|
private int XB;
|
|
private int YB;
|
|
|
|
public SwizzleAddr(int Width, int Height, int Pad)
|
|
{
|
|
int W = Pow2RoundUp(Width);
|
|
int H = Pow2RoundUp(Height);
|
|
|
|
XB = CountZeros(W);
|
|
YB = CountZeros(H);
|
|
|
|
int HH = H >> 1;
|
|
|
|
if (!IsPow2(Height) && Height <= HH + HH / 3 && YB > 3)
|
|
{
|
|
YB--;
|
|
}
|
|
|
|
this.Width = RoundSize(Width, Pad);
|
|
}
|
|
|
|
private static int Pow2RoundUp(int Value)
|
|
{
|
|
Value--;
|
|
|
|
Value |= (Value >> 1);
|
|
Value |= (Value >> 2);
|
|
Value |= (Value >> 4);
|
|
Value |= (Value >> 8);
|
|
Value |= (Value >> 16);
|
|
|
|
return ++Value;
|
|
}
|
|
|
|
private static bool IsPow2(int Value)
|
|
{
|
|
return Value != 0 && (Value & (Value - 1)) == 0;
|
|
}
|
|
|
|
private static int CountZeros(int Value)
|
|
{
|
|
int Count = 0;
|
|
|
|
for (int i = 0; i < 32; i++)
|
|
{
|
|
if ((Value & (1 << i)) != 0)
|
|
{
|
|
break;
|
|
}
|
|
|
|
Count++;
|
|
}
|
|
|
|
return Count;
|
|
}
|
|
|
|
private static int RoundSize(int Size, int Pad)
|
|
{
|
|
int Mask = Pad - 1;
|
|
|
|
if ((Size & Mask) != 0)
|
|
{
|
|
Size &= ~Mask;
|
|
Size += Pad;
|
|
}
|
|
|
|
return Size;
|
|
}
|
|
|
|
public int GetSwizzledAddress8(int X, int Y)
|
|
{
|
|
return GetSwizzledAddress(X, Y, 4);
|
|
}
|
|
|
|
public int GetSwizzledAddress16(int X, int Y)
|
|
{
|
|
return GetSwizzledAddress(X, Y, 3);
|
|
}
|
|
|
|
public int GetSwizzledAddress32(int X, int Y)
|
|
{
|
|
return GetSwizzledAddress(X, Y, 2);
|
|
}
|
|
|
|
public int GetSwizzledAddress64(int X, int Y)
|
|
{
|
|
return GetSwizzledAddress(X, Y, 1);
|
|
}
|
|
|
|
public int GetSwizzledAddress128(int X, int Y)
|
|
{
|
|
return GetSwizzledAddress(X, Y, 0);
|
|
}
|
|
|
|
private int GetSwizzledAddress(int X, int Y, int XBase)
|
|
{
|
|
/*
|
|
* Examples of patterns:
|
|
* x x y x y y x y 0 0 0 0 64 x 64 dxt5
|
|
* x x x x x y y y y x y y x y 0 0 0 0 512 x 512 dxt5
|
|
* y x x x x x x y y y y x y y x y 0 0 0 0 1024 x 1024 dxt5
|
|
* y y x x x x x x y y y y x y y x y x 0 0 0 2048 x 2048 dxt1
|
|
* y y y x x x x x x y y y y x y y x y x x 0 0 1024 x 1024 rgba8888
|
|
*
|
|
* Read from right to left, LSB first.
|
|
*/
|
|
int XCnt = XBase;
|
|
int YCnt = 1;
|
|
int XUsed = 0;
|
|
int YUsed = 0;
|
|
int Address = 0;
|
|
|
|
while (XUsed < XBase + 2 && XUsed + XCnt < XB)
|
|
{
|
|
int XMask = (1 << XCnt) - 1;
|
|
int YMask = (1 << YCnt) - 1;
|
|
|
|
Address |= (X & XMask) << XUsed + YUsed;
|
|
Address |= (Y & YMask) << XUsed + YUsed + XCnt;
|
|
|
|
X >>= XCnt;
|
|
Y >>= YCnt;
|
|
|
|
XUsed += XCnt;
|
|
YUsed += YCnt;
|
|
|
|
XCnt = Math.Min(XB - XUsed, 1);
|
|
YCnt = Math.Min(YB - YUsed, YCnt << 1);
|
|
}
|
|
|
|
Address |= (X + Y * (Width >> XUsed)) << (XUsed + YUsed);
|
|
|
|
return Address;
|
|
}
|
|
}
|
|
}
|