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(Hg3Reader.ApplyDelta): replaced 4 tables with one multi-dimensional array.

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This commit is contained in:
morkt 2015-11-21 10:25:42 +04:00
parent 3c22e9c077
commit aed3a38bf8
1 changed files with 9 additions and 13 deletions
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22
ArcFormats/CatSystem/ImageHG3.cs
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@ -231,11 +231,7 @@ namespace GameRes.Formats.CatSystem
byte[] ApplyDelta (byte[] pixels)
{
uint[] table1 = new uint[0x100];
uint[] table2 = new uint[0x100];
uint[] table3 = new uint[0x100];
uint[] table4 = new uint[0x100];
var table = new uint[4, 0x100];
for (uint i = 0; i < 0x100; ++i)
{
uint val = i & 0xC0;
@ -249,24 +245,24 @@ namespace GameRes.Formats.CatSystem
val <<= 6;
val |= i & 0x03;
table4[i] = val;
table3[i] = val << 2;
table2[i] = val << 4;
table1[i] = val << 6;
table[0,i] = val << 6;
table[1,i] = val << 4;
table[2,i] = val << 2;
table[3,i] = val;
}
int plane_size = pixels.Length / 4;
int plane1 = 0;
int plane0 = 0;
int plane1 = plane0 + plane_size;
int plane2 = plane1 + plane_size;
int plane3 = plane2 + plane_size;
int plane4 = plane3 + plane_size;
byte[] output = new byte[pixels.Length];
int dst = 0;
while (dst < output.Length)
{
uint val = table1[pixels[plane1++]] | table2[pixels[plane2++]]
| table3[pixels[plane3++]] | table4[pixels[plane4++]];
uint val = table[0,pixels[plane0++]] | table[1,pixels[plane1++]]
| table[2,pixels[plane2++]] | table[3,pixels[plane3++]];
output[dst++] = ConvertValue ((byte)val);
output[dst++] = ConvertValue ((byte)(val >> 8));