static void ComputeEndpoints(
ASTCPixel[] EndPoints,
int[] ColorValues,
uint ColorEndpointMode,
ref int ColorValuesPosition)
{
switch (ColorEndpointMode)
{
case 0:
{
uint[] Val = ReadUintColorValues(2, ColorValues, ref ColorValuesPosition);
EndPoints[0] = new ASTCPixel(0xFF, (short)Val[0], (short)Val[0], (short)Val[0]);
EndPoints[1] = new ASTCPixel(0xFF, (short)Val[1], (short)Val[1], (short)Val[1]);
break;
}
case 1:
{
uint[] Val = ReadUintColorValues(2, ColorValues, ref ColorValuesPosition);
int L0 = (int)((Val[0] >> 2) | (Val[1] & 0xC0));
int L1 = (int)Math.Max(L0 + (Val[1] & 0x3F), 0xFFU);
EndPoints[0] = new ASTCPixel(0xFF, (short)L0, (short)L0, (short)L0);
EndPoints[1] = new ASTCPixel(0xFF, (short)L1, (short)L1, (short)L1);
break;
}
case 4:
{
uint[] Val = ReadUintColorValues(4, ColorValues, ref ColorValuesPosition);
EndPoints[0] = new ASTCPixel((short)Val[2], (short)Val[0], (short)Val[0], (short)Val[0]);
EndPoints[1] = new ASTCPixel((short)Val[3], (short)Val[1], (short)Val[1], (short)Val[1]);
break;
}
case 5:
{
int[] Val = ReadIntColorValues(4, ColorValues, ref ColorValuesPosition);
BitArrayStream.BitTransferSigned(ref Val[1], ref Val[0]);
BitArrayStream.BitTransferSigned(ref Val[3], ref Val[2]);
EndPoints[0] = new ASTCPixel((short)Val[2], (short)Val[0], (short)Val[0], (short)Val[0]);
EndPoints[1] = new ASTCPixel((short)(Val[2] + Val[3]), (short)(Val[0] + Val[1]), (short)(Val[0] + Val[1]), (short)(Val[0] + Val[1]));
EndPoints[0].ClampByte();
EndPoints[1].ClampByte();
break;
}
case 6:
{
uint[] Val = ReadUintColorValues(4, ColorValues, ref ColorValuesPosition);
EndPoints[0] = new ASTCPixel(0xFF, (short)(Val[0] * Val[3] >> 8), (short)(Val[1] * Val[3] >> 8), (short)(Val[2] * Val[3] >> 8));
EndPoints[1] = new ASTCPixel(0xFF, (short)Val[0], (short)Val[1], (short)Val[2]);
break;
}
case 8:
{
uint[] Val = ReadUintColorValues(6, ColorValues, ref ColorValuesPosition);
if (Val[1] + Val[3] + Val[5] >= Val[0] + Val[2] + Val[4])
{
EndPoints[0] = new ASTCPixel(0xFF, (short)Val[0], (short)Val[2], (short)Val[4]);
EndPoints[1] = new ASTCPixel(0xFF, (short)Val[1], (short)Val[3], (short)Val[5]);
}
else
{
EndPoints[0] = ASTCPixel.BlueContract(0xFF, (short)Val[1], (short)Val[3], (short)Val[5]);
EndPoints[1] = ASTCPixel.BlueContract(0xFF, (short)Val[0], (short)Val[2], (short)Val[4]);
}
break;
}
case 9:
{
int[] Val = ReadIntColorValues(6, ColorValues, ref ColorValuesPosition);
BitArrayStream.BitTransferSigned(ref Val[1], ref Val[0]);
BitArrayStream.BitTransferSigned(ref Val[3], ref Val[2]);
BitArrayStream.BitTransferSigned(ref Val[5], ref Val[4]);
if (Val[1] + Val[3] + Val[5] >= 0)
{
EndPoints[0] = new ASTCPixel(0xFF, (short)Val[0], (short)Val[2], (short)Val[4]);
EndPoints[1] = new ASTCPixel(0xFF, (short)(Val[0] + Val[1]), (short)(Val[2] + Val[3]), (short)(Val[4] + Val[5]));
}
else
{
EndPoints[0] = ASTCPixel.BlueContract(0xFF, Val[0] + Val[1], Val[2] + Val[3], Val[4] + Val[5]);
EndPoints[1] = ASTCPixel.BlueContract(0xFF, Val[0], Val[2], Val[4]);
}
EndPoints[0].ClampByte();
EndPoints[1].ClampByte();
break;
}
case 10:
{
uint[] Val = ReadUintColorValues(6, ColorValues, ref ColorValuesPosition);
EndPoints[0] = new ASTCPixel((short)Val[4], (short)(Val[0] * Val[3] >> 8), (short)(Val[1] * Val[3] >> 8), (short)(Val[2] * Val[3] >> 8));
EndPoints[1] = new ASTCPixel((short)Val[5], (short)Val[0], (short)Val[1], (short)Val[2]);
break;
}
case 12:
{
uint[] Val = ReadUintColorValues(8, ColorValues, ref ColorValuesPosition);
if (Val[1] + Val[3] + Val[5] >= Val[0] + Val[2] + Val[4])
{
EndPoints[0] = new ASTCPixel((short)Val[6], (short)Val[0], (short)Val[2], (short)Val[4]);
EndPoints[1] = new ASTCPixel((short)Val[7], (short)Val[1], (short)Val[3], (short)Val[5]);
}
else
{
EndPoints[0] = ASTCPixel.BlueContract((short)Val[7], (short)Val[1], (short)Val[3], (short)Val[5]);
EndPoints[1] = ASTCPixel.BlueContract((short)Val[6], (short)Val[0], (short)Val[2], (short)Val[4]);
}
break;
}
case 13:
{
int[] Val = ReadIntColorValues(8, ColorValues, ref ColorValuesPosition);
BitArrayStream.BitTransferSigned(ref Val[1], ref Val[0]);
BitArrayStream.BitTransferSigned(ref Val[3], ref Val[2]);
BitArrayStream.BitTransferSigned(ref Val[5], ref Val[4]);
BitArrayStream.BitTransferSigned(ref Val[7], ref Val[6]);
if (Val[1] + Val[3] + Val[5] >= 0)
{
EndPoints[0] = new ASTCPixel((short)Val[6], (short)Val[0], (short)Val[2], (short)Val[4]);
EndPoints[1] = new ASTCPixel((short)(Val[7] + Val[6]), (short)(Val[0] + Val[1]), (short)(Val[2] + Val[3]), (short)(Val[4] + Val[5]));
}
else
{
EndPoints[0] = ASTCPixel.BlueContract(Val[6] + Val[7], Val[0] + Val[1], Val[2] + Val[3], Val[4] + Val[5]);
EndPoints[1] = ASTCPixel.BlueContract(Val[6], Val[0], Val[2], Val[4]);
}
EndPoints[0].ClampByte();
EndPoints[1].ClampByte();
break;
}
default:
throw new ASTCDecoderException("Unsupported color endpoint mode (is it HDR?)");
}
}
static void ComputeEndpoints(
AstcPixel[] endPoints,
int[] colorValues,
uint colorEndpointMode,
ref int colorValuesPosition)
{
switch (colorEndpointMode)
{
case 0:
{
uint[] val = ReadUintColorValues(2, colorValues, ref colorValuesPosition);
endPoints[0] = new AstcPixel(0xFF, (short)val[0], (short)val[0], (short)val[0]);
endPoints[1] = new AstcPixel(0xFF, (short)val[1], (short)val[1], (short)val[1]);
break;
}
case 1:
{
uint[] val = ReadUintColorValues(2, colorValues, ref colorValuesPosition);
int l0 = (int)((val[0] >> 2) | (val[1] & 0xC0));
int l1 = (int)Math.Max(l0 + (val[1] & 0x3F), 0xFFU);
endPoints[0] = new AstcPixel(0xFF, (short)l0, (short)l0, (short)l0);
endPoints[1] = new AstcPixel(0xFF, (short)l1, (short)l1, (short)l1);
break;
}
case 4:
{
uint[] val = ReadUintColorValues(4, colorValues, ref colorValuesPosition);
endPoints[0] = new AstcPixel((short)val[2], (short)val[0], (short)val[0], (short)val[0]);
endPoints[1] = new AstcPixel((short)val[3], (short)val[1], (short)val[1], (short)val[1]);
break;
}
case 5:
{
int[] val = ReadIntColorValues(4, colorValues, ref colorValuesPosition);
BitArrayStream.BitTransferSigned(ref val[1], ref val[0]);
BitArrayStream.BitTransferSigned(ref val[3], ref val[2]);
endPoints[0] = new AstcPixel((short)val[2], (short)val[0], (short)val[0], (short)val[0]);
endPoints[1] = new AstcPixel((short)(val[2] + val[3]), (short)(val[0] + val[1]), (short)(val[0] + val[1]), (short)(val[0] + val[1]));
endPoints[0].ClampByte();
endPoints[1].ClampByte();
break;
}
case 6:
{
uint[] val = ReadUintColorValues(4, colorValues, ref colorValuesPosition);
endPoints[0] = new AstcPixel(0xFF, (short)(val[0] * val[3] >> 8), (short)(val[1] * val[3] >> 8), (short)(val[2] * val[3] >> 8));
endPoints[1] = new AstcPixel(0xFF, (short)val[0], (short)val[1], (short)val[2]);
break;
}
case 8:
{
uint[] val = ReadUintColorValues(6, colorValues, ref colorValuesPosition);
if (val[1] + val[3] + val[5] >= val[0] + val[2] + val[4])
{
endPoints[0] = new AstcPixel(0xFF, (short)val[0], (short)val[2], (short)val[4]);
endPoints[1] = new AstcPixel(0xFF, (short)val[1], (short)val[3], (short)val[5]);
}
else
{
endPoints[0] = AstcPixel.BlueContract(0xFF, (short)val[1], (short)val[3], (short)val[5]);
endPoints[1] = AstcPixel.BlueContract(0xFF, (short)val[0], (short)val[2], (short)val[4]);
}
break;
}
case 9:
{
int[] val = ReadIntColorValues(6, colorValues, ref colorValuesPosition);
BitArrayStream.BitTransferSigned(ref val[1], ref val[0]);
BitArrayStream.BitTransferSigned(ref val[3], ref val[2]);
BitArrayStream.BitTransferSigned(ref val[5], ref val[4]);
if (val[1] + val[3] + val[5] >= 0)
{
endPoints[0] = new AstcPixel(0xFF, (short)val[0], (short)val[2], (short)val[4]);
endPoints[1] = new AstcPixel(0xFF, (short)(val[0] + val[1]), (short)(val[2] + val[3]), (short)(val[4] + val[5]));
}
else
{
endPoints[0] = AstcPixel.BlueContract(0xFF, val[0] + val[1], val[2] + val[3], val[4] + val[5]);
endPoints[1] = AstcPixel.BlueContract(0xFF, val[0], val[2], val[4]);
}
endPoints[0].ClampByte();
endPoints[1].ClampByte();
break;
}
case 10:
{
uint[] val = ReadUintColorValues(6, colorValues, ref colorValuesPosition);
endPoints[0] = new AstcPixel((short)val[4], (short)(val[0] * val[3] >> 8), (short)(val[1] * val[3] >> 8), (short)(val[2] * val[3] >> 8));
endPoints[1] = new AstcPixel((short)val[5], (short)val[0], (short)val[1], (short)val[2]);
break;
}
case 12:
{
uint[] val = ReadUintColorValues(8, colorValues, ref colorValuesPosition);
if (val[1] + val[3] + val[5] >= val[0] + val[2] + val[4])
{
endPoints[0] = new AstcPixel((short)val[6], (short)val[0], (short)val[2], (short)val[4]);
endPoints[1] = new AstcPixel((short)val[7], (short)val[1], (short)val[3], (short)val[5]);
}
else
{
endPoints[0] = AstcPixel.BlueContract((short)val[7], (short)val[1], (short)val[3], (short)val[5]);
endPoints[1] = AstcPixel.BlueContract((short)val[6], (short)val[0], (short)val[2], (short)val[4]);
}
break;
}
case 13:
{
int[] val = ReadIntColorValues(8, colorValues, ref colorValuesPosition);
BitArrayStream.BitTransferSigned(ref val[1], ref val[0]);
BitArrayStream.BitTransferSigned(ref val[3], ref val[2]);
BitArrayStream.BitTransferSigned(ref val[5], ref val[4]);
BitArrayStream.BitTransferSigned(ref val[7], ref val[6]);
if (val[1] + val[3] + val[5] >= 0)
{
endPoints[0] = new AstcPixel((short)val[6], (short)val[0], (short)val[2], (short)val[4]);
endPoints[1] = new AstcPixel((short)(val[7] + val[6]), (short)(val[0] + val[1]), (short)(val[2] + val[3]), (short)(val[4] + val[5]));
}
else
{
endPoints[0] = AstcPixel.BlueContract(val[6] + val[7], val[0] + val[1], val[2] + val[3], val[4] + val[5]);
endPoints[1] = AstcPixel.BlueContract(val[6], val[0], val[2], val[4]);
}
endPoints[0].ClampByte();
endPoints[1].ClampByte();
break;
}
default:
throw new AstcDecoderException("Unsupported color endpoint mode (is it HDR?)");
}
}
