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Switch-Toolbox/Switch_Toolbox_Library/FileFormats/CSharpImageLibrary/DX10_Helpers.cs

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2019-06-01 21:49:39 +00:00
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
// https://github.com/KFreon/CSharpImageLibrary
namespace CSharpImageLibrary.DDS
{
internal static class DX10_Helpers
{
public struct LDRColourEndPointPair
{
public LDRColour A;
public LDRColour B;
public LDRColourEndPointPair(LDRColour a, LDRColour b)
{
A = a;
B = b;
}
public override string ToString()
{
return "A" + Environment.NewLine + $"R: {A.R} G: {A.G} B: {A.B} A: {A.A}" + Environment.NewLine +
"B" + Environment.NewLine + $"R: {B.R} G: {B.G} B: {B.B} A: {B.A}";
}
}
#region Structs
public struct LDRColour
{
public int R;
public int G;
public int B;
public int A;
public LDRColour(byte R, byte G, byte B, byte A)
{
this.R = R;
this.B = B;
this.G = G;
this.A = A;
}
public LDRColour(float r, float g, float b, float a)
{
R = (byte)(Clamp(r, 0f, 1f) * 255);
G = (byte)(Clamp(g, 0f, 1f) * 255);
B = (byte)(Clamp(b, 0f, 1f) * 255);
A = (byte)(Clamp(a, 0f, 1f) * 255);
}
public override string ToString()
{
return $"R: {R}, G: {G}, B: {B}, A: {A}";
}
static float Clamp(float val, float lower, float upper)
{
if (val > upper)
return upper;
if (val < lower)
return lower;
return val;
}
}
public struct HDRColour
{
public float R, G, B, A;
public HDRColour(LDRColour colour)
{
R = colour.R * 1f / 255f;
G = colour.G * 1f / 255f;
B = colour.B * 1f / 255f;
A = colour.A * 1f / 255f;
}
public override string ToString()
{
return $"R: {R}, G: {G}, B: {B}, A: {A}";
}
}
#endregion Structs
#region Constants
internal const int BC67_WEIGHT_MAX = 64;
internal const int BC67_WEIGHT_ROUND = 32;
internal const int BC67_WEIGHT_SHIFT = 6;
internal const int NUM_PIXELS_PER_BLOCK = 16;
internal const int BC7_MAX_REGIONS = 3;
internal const int BC7_MAX_SHAPES = 64;
internal const int BC7_MAX_INDICIES = 16;
internal const int BC7_NUM_CHANNELS = 4;
#endregion Constants
#region Tables
// 3,64,16
internal static byte[][][] PartitionTable = new byte[3][][]
{ // 1 Region case has no subsets (all 0)
new byte[64][]
{
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
},
new byte[64][]
{ // BC6H/BC7 Partition Set for 2 Subsets
new byte[16] { 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1 }, // Shape 0
new byte[16] { 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1 }, // Shape 1
new byte[16] { 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1 }, // Shape 2
new byte[16] { 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 1 }, // Shape 3
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 1 }, // Shape 4
new byte[16] { 0, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1 }, // Shape 5
new byte[16] { 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1 }, // Shape 6
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 1 }, // Shape 7
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1 }, // Shape 8
new byte[16] { 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }, // Shape 9
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1 }, // Shape 10
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1 }, // Shape 11
new byte[16] { 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }, // Shape 12
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1 }, // Shape 13
new byte[16] { 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }, // Shape 14
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1 }, // Shape 15
new byte[16] { 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1 }, // Shape 16
new byte[16] { 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0 }, // Shape 17
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0 }, // Shape 18
new byte[16] { 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0 }, // Shape 19
new byte[16] { 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0 }, // Shape 20
new byte[16] { 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0 }, // Shape 21
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0 }, // Shape 22
new byte[16] { 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 1 }, // Shape 23
new byte[16] { 0, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0 }, // Shape 24
new byte[16] { 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0 }, // Shape 25
new byte[16] { 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0 }, // Shape 26
new byte[16] { 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0 }, // Shape 27
new byte[16] { 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0 }, // Shape 28
new byte[16] { 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0 }, // Shape 29
new byte[16] { 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0 }, // Shape 30
new byte[16] { 0, 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0 }, // Shape 31
// BC7 Partition Set for 2 Subsets (second-half)
new byte[16] { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 }, // Shape 32
new byte[16] { 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1 }, // Shape 33
new byte[16] { 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0 }, // Shape 34
new byte[16] { 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0 }, // Shape 35
new byte[16] { 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0 }, // Shape 36
new byte[16] { 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0 }, // Shape 37
new byte[16] { 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1 }, // Shape 38
new byte[16] { 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1 }, // Shape 39
new byte[16] { 0, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0 }, // Shape 40
new byte[16] { 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0 }, // Shape 41
new byte[16] { 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 0 }, // Shape 42
new byte[16] { 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 0, 0 }, // Shape 43
new byte[16] { 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0 }, // Shape 44
new byte[16] { 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1 }, // Shape 45
new byte[16] { 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1 }, // Shape 46
new byte[16] { 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0 }, // Shape 47
new byte[16] { 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0 }, // Shape 48
new byte[16] { 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0 }, // Shape 49
new byte[16] { 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0 }, // Shape 50
new byte[16] { 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0 }, // Shape 51
new byte[16] { 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1 }, // Shape 52
new byte[16] { 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1 }, // Shape 53
new byte[16] { 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0 }, // Shape 54
new byte[16] { 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0 }, // Shape 55
new byte[16] { 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1 }, // Shape 56
new byte[16] { 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1 }, // Shape 57
new byte[16] { 0, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1 }, // Shape 58
new byte[16] { 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1 }, // Shape 59
new byte[16] { 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1 }, // Shape 60
new byte[16] { 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0 }, // Shape 61
new byte[16] { 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0 }, // Shape 62
new byte[16] { 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1 } // Shape 63
},
new byte[64][]
{ // BC7 Partition Set for 3 Subsets
new byte[16] { 0, 0, 1, 1, 0, 0, 1, 1, 0, 2, 2, 1, 2, 2, 2, 2 }, // Shape 0
new byte[16] { 0, 0, 0, 1, 0, 0, 1, 1, 2, 2, 1, 1, 2, 2, 2, 1 }, // Shape 1
new byte[16] { 0, 0, 0, 0, 2, 0, 0, 1, 2, 2, 1, 1, 2, 2, 1, 1 }, // Shape 2
new byte[16] { 0, 2, 2, 2, 0, 0, 2, 2, 0, 0, 1, 1, 0, 1, 1, 1 }, // Shape 3
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 1, 1, 2, 2 }, // Shape 4
new byte[16] { 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 2, 2, 0, 0, 2, 2 }, // Shape 5
new byte[16] { 0, 0, 2, 2, 0, 0, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1 }, // Shape 6
new byte[16] { 0, 0, 1, 1, 0, 0, 1, 1, 2, 2, 1, 1, 2, 2, 1, 1 }, // Shape 7
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2 }, // Shape 8
new byte[16] { 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2 }, // Shape 9
new byte[16] { 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2 }, // Shape 10
new byte[16] { 0, 0, 1, 2, 0, 0, 1, 2, 0, 0, 1, 2, 0, 0, 1, 2 }, // Shape 11
new byte[16] { 0, 1, 1, 2, 0, 1, 1, 2, 0, 1, 1, 2, 0, 1, 1, 2 }, // Shape 12
new byte[16] { 0, 1, 2, 2, 0, 1, 2, 2, 0, 1, 2, 2, 0, 1, 2, 2 }, // Shape 13
new byte[16] { 0, 0, 1, 1, 0, 1, 1, 2, 1, 1, 2, 2, 1, 2, 2, 2 }, // Shape 14
new byte[16] { 0, 0, 1, 1, 2, 0, 0, 1, 2, 2, 0, 0, 2, 2, 2, 0 }, // Shape 15
new byte[16] { 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 2, 1, 1, 2, 2 }, // Shape 16
new byte[16] { 0, 1, 1, 1, 0, 0, 1, 1, 2, 0, 0, 1, 2, 2, 0, 0 }, // Shape 17
new byte[16] { 0, 0, 0, 0, 1, 1, 2, 2, 1, 1, 2, 2, 1, 1, 2, 2 }, // Shape 18
new byte[16] { 0, 0, 2, 2, 0, 0, 2, 2, 0, 0, 2, 2, 1, 1, 1, 1 }, // Shape 19
new byte[16] { 0, 1, 1, 1, 0, 1, 1, 1, 0, 2, 2, 2, 0, 2, 2, 2 }, // Shape 20
new byte[16] { 0, 0, 0, 1, 0, 0, 0, 1, 2, 2, 2, 1, 2, 2, 2, 1 }, // Shape 21
new byte[16] { 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 2, 2, 0, 1, 2, 2 }, // Shape 22
new byte[16] { 0, 0, 0, 0, 1, 1, 0, 0, 2, 2, 1, 0, 2, 2, 1, 0 }, // Shape 23
new byte[16] { 0, 1, 2, 2, 0, 1, 2, 2, 0, 0, 1, 1, 0, 0, 0, 0 }, // Shape 24
new byte[16] { 0, 0, 1, 2, 0, 0, 1, 2, 1, 1, 2, 2, 2, 2, 2, 2 }, // Shape 25
new byte[16] { 0, 1, 1, 0, 1, 2, 2, 1, 1, 2, 2, 1, 0, 1, 1, 0 }, // Shape 26
new byte[16] { 0, 0, 0, 0, 0, 1, 1, 0, 1, 2, 2, 1, 1, 2, 2, 1 }, // Shape 27
new byte[16] { 0, 0, 2, 2, 1, 1, 0, 2, 1, 1, 0, 2, 0, 0, 2, 2 }, // Shape 28
new byte[16] { 0, 1, 1, 0, 0, 1, 1, 0, 2, 0, 0, 2, 2, 2, 2, 2 }, // Shape 29
new byte[16] { 0, 0, 1, 1, 0, 1, 2, 2, 0, 1, 2, 2, 0, 0, 1, 1 }, // Shape 30
new byte[16] { 0, 0, 0, 0, 2, 0, 0, 0, 2, 2, 1, 1, 2, 2, 2, 1 }, // Shape 31
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 2, 1, 1, 2, 2, 1, 2, 2, 2 }, // Shape 32
new byte[16] { 0, 2, 2, 2, 0, 0, 2, 2, 0, 0, 1, 2, 0, 0, 1, 1 }, // Shape 33
new byte[16] { 0, 0, 1, 1, 0, 0, 1, 2, 0, 0, 2, 2, 0, 2, 2, 2 }, // Shape 34
new byte[16] { 0, 1, 2, 0, 0, 1, 2, 0, 0, 1, 2, 0, 0, 1, 2, 0 }, // Shape 35
new byte[16] { 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 0, 0, 0, 0 }, // Shape 36
new byte[16] { 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0 }, // Shape 37
new byte[16] { 0, 1, 2, 0, 2, 0, 1, 2, 1, 2, 0, 1, 0, 1, 2, 0 }, // Shape 38
new byte[16] { 0, 0, 1, 1, 2, 2, 0, 0, 1, 1, 2, 2, 0, 0, 1, 1 }, // Shape 39
new byte[16] { 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 0, 0, 0, 0, 1, 1 }, // Shape 40
new byte[16] { 0, 1, 0, 1, 0, 1, 0, 1, 2, 2, 2, 2, 2, 2, 2, 2 }, // Shape 41
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 2, 1, 2, 1, 2, 1 }, // Shape 42
new byte[16] { 0, 0, 2, 2, 1, 1, 2, 2, 0, 0, 2, 2, 1, 1, 2, 2 }, // Shape 43
new byte[16] { 0, 0, 2, 2, 0, 0, 1, 1, 0, 0, 2, 2, 0, 0, 1, 1 }, // Shape 44
new byte[16] { 0, 2, 2, 0, 1, 2, 2, 1, 0, 2, 2, 0, 1, 2, 2, 1 }, // Shape 45
new byte[16] { 0, 1, 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 0, 1, 0, 1 }, // Shape 46
new byte[16] { 0, 0, 0, 0, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1 }, // Shape 47
new byte[16] { 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 2, 2, 2 }, // Shape 48
new byte[16] { 0, 2, 2, 2, 0, 1, 1, 1, 0, 2, 2, 2, 0, 1, 1, 1 }, // Shape 49
new byte[16] { 0, 0, 0, 2, 1, 1, 1, 2, 0, 0, 0, 2, 1, 1, 1, 2 }, // Shape 50
new byte[16] { 0, 0, 0, 0, 2, 1, 1, 2, 2, 1, 1, 2, 2, 1, 1, 2 }, // Shape 51
new byte[16] { 0, 2, 2, 2, 0, 1, 1, 1, 0, 1, 1, 1, 0, 2, 2, 2 }, // Shape 52
new byte[16] { 0, 0, 0, 2, 1, 1, 1, 2, 1, 1, 1, 2, 0, 0, 0, 2 }, // Shape 53
new byte[16] { 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 2, 2, 2, 2 }, // Shape 54
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 1, 2, 2, 1, 1, 2 }, // Shape 55
new byte[16] { 0, 1, 1, 0, 0, 1, 1, 0, 2, 2, 2, 2, 2, 2, 2, 2 }, // Shape 56
new byte[16] { 0, 0, 2, 2, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 2, 2 }, // Shape 57
new byte[16] { 0, 0, 2, 2, 1, 1, 2, 2, 1, 1, 2, 2, 0, 0, 2, 2 }, // Shape 58
new byte[16] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 1, 2 }, // Shape 59
new byte[16] { 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 1 }, // Shape 60
new byte[16] { 0, 2, 2, 2, 1, 2, 2, 2, 0, 2, 2, 2, 1, 2, 2, 2 }, // Shape 61
new byte[16] { 0, 1, 0, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 }, // Shape 62
new byte[16] { 0, 1, 1, 1, 2, 0, 1, 1, 2, 2, 0, 1, 2, 2, 2, 0 } // Shape 63
}
};
// 3,64,3
internal static byte[][][] FixUpTable = new byte[3][][]
{
new byte[64][]
{ // No fix-ups for 1st subset for BC6H or BC7
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 },
new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }, new byte[3] { 0, 0, 0 }
},
new byte[64][]
{ // BC6H/BC7 Partition Set Fixups for 2 Subsets
new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 },
new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 },
new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 },
new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 },
new byte[3] { 0,15, 0 }, new byte[3] { 0, 2, 0 }, new byte[3] { 0, 8, 0 }, new byte[3] { 0, 2, 0 },
new byte[3] { 0, 2, 0 }, new byte[3] { 0, 8, 0 }, new byte[3] { 0, 8, 0 }, new byte[3] { 0,15, 0 },
new byte[3] { 0, 2, 0 }, new byte[3] { 0, 8, 0 }, new byte[3] { 0, 2, 0 }, new byte[3] { 0, 2, 0 },
new byte[3] { 0, 8, 0 }, new byte[3] { 0, 8, 0 }, new byte[3] { 0, 2, 0 }, new byte[3] { 0, 2, 0 },
// BC7 Partition Set Fixups for 2 Subsets (second-half)
new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0, 6, 0 }, new byte[3] { 0, 8, 0 },
new byte[3] { 0, 2, 0 }, new byte[3] { 0, 8, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 },
new byte[3] { 0, 2, 0 }, new byte[3] { 0, 8, 0 }, new byte[3] { 0, 2, 0 }, new byte[3] { 0, 2, 0 },
new byte[3] { 0, 2, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0, 6, 0 },
new byte[3] { 0, 6, 0 }, new byte[3] { 0, 2, 0 }, new byte[3] { 0, 6, 0 }, new byte[3] { 0, 8, 0 },
new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0, 2, 0 }, new byte[3] { 0, 2, 0 },
new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 }, new byte[3] { 0,15, 0 },
new byte[3] { 0,15, 0 }, new byte[3] { 0, 2, 0 }, new byte[3] { 0, 2, 0 }, new byte[3] { 0,15, 0 }
},
new byte[64][]
{ // BC7 Partition Set Fixups for 3 Subsets
new byte[3] { 0, 3,15 }, new byte[3] { 0, 3, 8 }, new byte[3] { 0,15, 8 }, new byte[3] { 0,15, 3 },
new byte[3] { 0, 8,15 }, new byte[3] { 0, 3,15 }, new byte[3] { 0,15, 3 }, new byte[3] { 0,15, 8 },
new byte[3] { 0, 8,15 }, new byte[3] { 0, 8,15 }, new byte[3] { 0, 6,15 }, new byte[3] { 0, 6,15 },
new byte[3] { 0, 6,15 }, new byte[3] { 0, 5,15 }, new byte[3] { 0, 3,15 }, new byte[3] { 0, 3, 8 },
new byte[3] { 0, 3,15 }, new byte[3] { 0, 3, 8 }, new byte[3] { 0, 8,15 }, new byte[3] { 0,15, 3 },
new byte[3] { 0, 3,15 }, new byte[3] { 0, 3, 8 }, new byte[3] { 0, 6,15 }, new byte[3] { 0,10, 8 },
new byte[3] { 0, 5, 3 }, new byte[3] { 0, 8,15 }, new byte[3] { 0, 8, 6 }, new byte[3] { 0, 6,10 },
new byte[3] { 0, 8,15 }, new byte[3] { 0, 5,15 }, new byte[3] { 0,15,10 }, new byte[3] { 0,15, 8 },
new byte[3] { 0, 8,15 }, new byte[3] { 0,15, 3 }, new byte[3] { 0, 3,15 }, new byte[3] { 0, 5,10 },
new byte[3] { 0, 6,10 }, new byte[3] { 0,10, 8 }, new byte[3] { 0, 8, 9 }, new byte[3] { 0,15,10 },
new byte[3] { 0,15, 6 }, new byte[3] { 0, 3,15 }, new byte[3] { 0,15, 8 }, new byte[3] { 0, 5,15 },
new byte[3] { 0,15, 3 }, new byte[3] { 0,15, 6 }, new byte[3] { 0,15, 6 }, new byte[3] { 0,15, 8 },
new byte[3] { 0, 3,15 }, new byte[3] { 0,15, 3 }, new byte[3] { 0, 5,15 }, new byte[3] { 0, 5,15 },
new byte[3] { 0, 5,15 }, new byte[3] { 0, 8,15 }, new byte[3] { 0, 5,15 }, new byte[3] { 0,10,15 },
new byte[3] { 0, 5,15 }, new byte[3] { 0,10,15 }, new byte[3] { 0, 8,15 }, new byte[3] { 0,13,15 },
new byte[3] { 0,15, 3 }, new byte[3] { 0,12,15 }, new byte[3] { 0, 3,15 }, new byte[3] { 0, 3, 8 }
}
};
internal static int[] AWeights2 = new int[] { 0, 21, 43, 64 };
internal static int[] AWeights3 = new int[] { 0, 9, 18, 27, 37, 46, 55, 64 };
internal static int[] AWeights4 = new int[] { 0, 4, 9, 13, 17, 21, 26, 30, 34, 38, 43, 47, 51, 55, 60, 64 };
#endregion Tables
#region Decompression Helpers
internal static int InterpolateA(LDRColour lDRColour1, LDRColour lDRColour2, int wa, int waPrec)
{
int[] weights = null;
switch (waPrec)
{
case 2:
weights = AWeights2;
break;
case 3:
weights = AWeights3;
break;
case 4:
weights = AWeights4;
break;
default:
return 0;
}
return (lDRColour1.A * (BC67_WEIGHT_MAX - weights[wa]) + lDRColour2.A * weights[wa] + BC67_WEIGHT_ROUND) >> BC67_WEIGHT_SHIFT;
}
internal static LDRColour InterpolateRGB(LDRColour lDRColour1, LDRColour lDRColour2, int wc, int wcPrec)
{
LDRColour temp = new LDRColour();
int[] weights = null;
switch (wcPrec)
{
case 2:
weights = AWeights2;
break;
case 3:
weights = AWeights3;
break;
case 4:
weights = AWeights4;
break;
default:
return temp;
}
temp.R = (lDRColour1.R * (BC67_WEIGHT_MAX - weights[wc]) + lDRColour2.R * weights[wc] + BC67_WEIGHT_ROUND) >> BC67_WEIGHT_SHIFT;
temp.G = (lDRColour1.G * (BC67_WEIGHT_MAX - weights[wc]) + lDRColour2.G * weights[wc] + BC67_WEIGHT_ROUND) >> BC67_WEIGHT_SHIFT;
temp.B = (lDRColour1.B * (BC67_WEIGHT_MAX - weights[wc]) + lDRColour2.B * weights[wc] + BC67_WEIGHT_ROUND) >> BC67_WEIGHT_SHIFT;
return temp;
}
internal static bool IsFixUpOffset(int partitions, int shape, int offset)
{
for (int i = 0; i <= partitions; i++)
{
if (offset == FixUpTable[partitions][shape][i])
return true;
}
return false;
}
internal static LDRColour Unquantise(LDRColour colour, LDRColour rGBPrecisionWithP)
{
LDRColour temp = new LDRColour()
{
R = Unquantise(colour.R, rGBPrecisionWithP.R),
G = Unquantise(colour.G, rGBPrecisionWithP.G),
B = Unquantise(colour.B, rGBPrecisionWithP.B),
A = rGBPrecisionWithP.A > 0 ? Unquantise(colour.A, rGBPrecisionWithP.A) : 255
};
return temp;
}
internal static int Unquantise(int r1, int r2)
{
int temp = r1 << (8 - r2);
return temp | (temp >> r2);
}
internal static int GetBit(byte[] source, int sourceStart, ref int start)
{
int uIndex = start >> 3;
int ret = (source[sourceStart + uIndex] >> (start - (uIndex << 3))) & 0x01;
start++;
return ret;
}
internal static int GetBits(byte[] source, int sourceStart, ref int start, int length)
{
if (length == 0)
return 0;
int uIndex = start >> 3;
int uBase = start - (uIndex << 3);
int ret = 0;
if (uBase + length > 8)
{
int firstIndexBits = 8 - uBase;
int nextIndexBits = length - firstIndexBits;
ret = (source[sourceStart + uIndex] >> uBase) | ((source[sourceStart + uIndex + 1] & ((1 << nextIndexBits) - 1)) << firstIndexBits);
}
else
ret = (source[sourceStart + uIndex] >> uBase) & ((1 << length) - 1);
start += length;
return ret;
}
#endregion Decompression Helpers
}
}
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