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perf: Use stream decode in DecodeQOI

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Crsky
2026-03-17 17:12:41 +08:00
parent 387d6110ce
commit be1485a429
1 changed files with 26 additions and 73 deletions
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99
ArcFormats/KiriKiri/ImageTLG.cs
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@@ -1097,86 +1097,27 @@ namespace GameRes.Formats.KiriKiri
}
}
static class QoiCodec
{
public const int Index = 0x00;
public const int Diff = 0x40;
public const int Luma = 0x80;
public const int Run = 0xC0;
public const int Rgb = 0xFE;
public const int Rgba = 0xFF;
public const int Mask2 = 0xC0;
public const int HashTableSize = 64;
}
byte[] DecodeQOI (IBinaryStream src, uint width, uint height)
{
var output = new byte[4*width*height];
var table = new byte[4*QoiCodec.HashTableSize];
byte r = 0, g = 0, b = 0, a = 255;
var count = 4*width*height;
var output = new byte [count];
var qoi = new QoiDecodeStream (src);
uint pixel = 0;
var run = 0;
for (var dst = 0; dst < output.Length; dst += 4)
var dst = 0;
while (dst < count)
{
if (run > 0)
run--;
if (run > 1)
--run;
else
{
var b1 = src.ReadByte ();
if (-1 == b1)
throw new EndOfStreamException ();
if (QoiCodec.Rgb == b1)
{
var rgb = src.ReadInt24 ();
r = (byte)rgb;
g = (byte)(rgb >> 8);
b = (byte)(rgb >> 16);
}
else if (QoiCodec.Rgba == b1)
{
var rgba = src.ReadInt32 ();
r = (byte)rgba;
g = (byte)(rgba >> 8);
b = (byte)(rgba >> 16);
a = (byte)(rgba >> 24);
}
else if (QoiCodec.Index == (b1 & QoiCodec.Mask2))
{
var p1 = (b1 & ~QoiCodec.Mask2) * 4;
r = table[p1 ];
g = table[p1+1];
b = table[p1+2];
a = table[p1+3];
}
else if (QoiCodec.Diff == (b1 & QoiCodec.Mask2))
{
r += (byte)(((b1 >> 4) & 0x03) - 2);
g += (byte)(((b1 >> 2) & 0x03) - 2);
b += (byte)((b1 & 0x03) - 2);
}
else if (QoiCodec.Luma == (b1 & QoiCodec.Mask2))
{
var b2 = src.ReadByte ();
if (-1 == b2)
throw new EndOfStreamException ();
var vg = (b1 & 0x3F) - 32;
r += (byte)(vg - 8 + ((b2 >> 4) & 0x0F));
g += (byte)vg;
b += (byte)(vg - 8 + (b2 & 0x0F));
}
else if (QoiCodec.Run == (b1 & QoiCodec.Mask2))
{
run = b1 & 0x3F;
}
var p2 = (r*3 + g*5 + b*7 + a*11) % QoiCodec.HashTableSize*4;
table[p2 ] = r;
table[p2+1] = g;
table[p2+2] = b;
table[p2+3] = a;
run = qoi.Read (out pixel);
}
output[dst ] = b;
output[dst+1] = g;
output[dst+2] = r;
output[dst+3] = a;
output[dst ] = (byte)pixel;
output[dst+1] = (byte)(pixel >> 8);
output[dst+2] = (byte)(pixel >> 16);
output[dst+3] = (byte)(pixel >> 24);
dst += 4;
}
return output;
}
@@ -1272,6 +1213,18 @@ namespace GameRes.Formats.KiriKiri
}
}
static class QoiCodec
{
public const int Index = 0x00;
public const int Diff = 0x40;
public const int Luma = 0x80;
public const int Run = 0xC0;
public const int Rgb = 0xFE;
public const int Rgba = 0xFF;
public const int Mask2 = 0xC0;
public const int HashTableSize = 64;
}
class QoiDecodeStream
{
readonly IBinaryStream m_input;