static public FormatElement[] ParseFormatString(string formatString, bool tightPacking, out string errors)
{
var elems = new List<FormatElement>();
var formatReader = new StringReader(formatString);
// regex doesn't account for trailing or preceeding whitespace, or comments
var regExpr = @"^(row_major\s+)?" + // row_major matrix
@"(" +
@"uintten|unormten" +
@"|unormh|unormb" +
@"|snormh|snormb" +
@"|bool" + // bool is stored as 4-byte int in hlsl
@"|byte|short|int" + // signed ints
@"|ubyte|ushort|uint" + // unsigned ints
@"|xbyte|xshort|xint" + // hex ints
@"|half|float|double" + // float types
@")" +
@"([1-9])?" + // might be a vector
@"(x[1-9])?" + // or a matrix
@"(\s+[A-Za-z_][A-Za-z0-9_]*)?" + // get identifier name
@"(\[[0-9]+\])?" + // optional array dimension
@"(\s*:\s*[A-Za-z_][A-Za-z0-9_]*)?" + // optional semantic
@"$";
Regex regParser = new Regex(regExpr, RegexOptions.Compiled);
bool success = true;
errors = "";
var text = formatReader.ReadToEnd();
text = text.Replace("{", "").Replace("}", "");
Regex c_comments = new Regex(@"/\*[^*]*\*+(?:[^*/][^*]*\*+)*/", RegexOptions.Compiled);
text = c_comments.Replace(text, "");
Regex cpp_comments = new Regex(@"//.*", RegexOptions.Compiled);
text = cpp_comments.Replace(text, "");
uint offset = 0;
// get each line and parse it to determine the format the user wanted
foreach (var l in text.Split(';'))
{
var line = l;
line = line.Trim();
if (line == "") continue;
var match = regParser.Match(line);
if (!match.Success)
{
errors = "Couldn't parse line:\n" + line;
success = false;
break;
}
var basetype = match.Groups[2].Value;
bool row_major = match.Groups[1].Success;
var vectorDim = match.Groups[3].Success ? match.Groups[3].Value : "1";
var matrixDim = match.Groups[4].Success ? match.Groups[4].Value.Substring(1) : "1";
var name = match.Groups[5].Success ? match.Groups[5].Value.Trim() : "data";
var arrayDim = match.Groups[6].Success ? match.Groups[6].Value.Trim() : "[1]";
arrayDim = arrayDim.Substring(1, arrayDim.Length - 2);
if (match.Groups[4].Success)
{
var a = vectorDim;
vectorDim = matrixDim;
matrixDim = a;
}
ResourceFormat fmt = new ResourceFormat(FormatComponentType.None, 0, 0);
bool hex = false;
FormatComponentType type = FormatComponentType.Float;
uint count = 0;
uint arrayCount = 1;
uint matrixCount = 0;
uint width = 0;
// calculate format
{
if (!uint.TryParse(vectorDim, out count))
{
errors = "Invalid vector dimension on line:\n" + line;
success = false;
break;
}
if (!uint.TryParse(arrayDim, out arrayCount))
{
arrayCount = 1;
}
arrayCount = Math.Max(0, arrayCount);
if (!uint.TryParse(matrixDim, out matrixCount))
{
errors = "Invalid matrix second dimension on line:\n" + line;
success = false;
break;
}
if (basetype == "bool")
{
type = FormatComponentType.UInt;
width = 4;
}
else if (basetype == "byte")
{
type = FormatComponentType.SInt;
width = 1;
}
else if (basetype == "ubyte" || basetype == "xbyte")
{
type = FormatComponentType.UInt;
width = 1;
}
else if (basetype == "short")
{
type = FormatComponentType.SInt;
width = 2;
}
else if (basetype == "ushort" || basetype == "xshort")
{
type = FormatComponentType.UInt;
width = 2;
}
else if (basetype == "int")
{
type = FormatComponentType.SInt;
width = 4;
}
else if (basetype == "uint" || basetype == "xint")
{
type = FormatComponentType.UInt;
width = 4;
}
else if (basetype == "half")
{
type = FormatComponentType.Float;
width = 2;
}
else if (basetype == "float")
{
type = FormatComponentType.Float;
width = 4;
}
else if (basetype == "double")
{
type = FormatComponentType.Float;
width = 8;
}
else if (basetype == "unormh")
{
type = FormatComponentType.UNorm;
width = 2;
}
else if (basetype == "unormb")
{
type = FormatComponentType.UNorm;
width = 1;
}
else if (basetype == "snormh")
{
type = FormatComponentType.SNorm;
width = 2;
}
else if (basetype == "snormb")
{
type = FormatComponentType.SNorm;
width = 1;
}
else if (basetype == "uintten")
{
fmt = new ResourceFormat(FormatComponentType.UInt, 4 * count, 1);
fmt.special = true;
fmt.specialFormat = SpecialFormat.R10G10B10A2;
}
else if (basetype == "unormten")
{
fmt = new ResourceFormat(FormatComponentType.UNorm, 4 * count, 1);
fmt.special = true;
fmt.specialFormat = SpecialFormat.R10G10B10A2;
}
else
{
errors = "Unrecognised basic type on line:\n" + line;
success = false;
break;
}
}
if (basetype == "xint" || basetype == "xshort" || basetype == "xbyte")
hex = true;
if (fmt.compType == FormatComponentType.None)
fmt = new ResourceFormat(type, count, width);
if (arrayCount == 1)
{
FormatElement elem = new FormatElement(name, 0, offset, false, row_major, matrixCount, fmt, hex);
uint advance = elem.ByteSize;
if (!tightPacking)
{
// cbuffer packing always works in floats
advance = (advance + 3U) & (~3U);
// cbuffer packing doesn't allow elements to cross float4 boundaries, nudge up if this was the case
if (offset / 16 != (offset + elem.ByteSize - 1) / 16)
{
elem.offset = offset = (offset + 0xFU) & (~0xFU);
}
}
elems.Add(elem);
offset += advance;
}
else
{
// when cbuffer packing, arrays are always aligned at float4 boundary
if (!tightPacking)
{
if (offset % 16 != 0)
{
offset = (offset + 0xFU) & (~0xFU);
}
}
for (uint a = 0; a < arrayCount; a++)
{
FormatElement elem = new FormatElement(String.Format("{0}[{1}]", name, a), 0, offset, false, row_major, matrixCount, fmt, hex);
elems.Add(elem);
uint advance = elem.ByteSize;
// cbuffer packing each array element is always float4 aligned
if (!tightPacking)
{
advance = (advance + 0xFU) & (~0xFU);
}
offset += advance;
}
}
}
if (!success || elems.Count == 0)
{
elems.Clear();
var fmt = new ResourceFormat(FormatComponentType.UInt, 4, 4);
elems.Add(new FormatElement("data", 0, 0, false, false, 1, fmt, true));
}
return elems.ToArray();
}
static public FormatElement[] ParseFormatString(string formatString, UInt64 maxLen, bool tightPacking, out string errors)
{
var elems = new List <FormatElement>();
var formatReader = new StringReader(formatString);
// regex doesn't account for trailing or preceeding whitespace, or comments
var regExpr = @"^(row_major\s+)?" + // row_major matrix
@"(" +
@"uintten|unormten" +
@"|unormh|unormb" +
@"|snormh|snormb" +
@"|bool" + // bool is stored as 4-byte int
@"|byte|short|int" + // signed ints
@"|ubyte|ushort|uint" + // unsigned ints
@"|xbyte|xshort|xint" + // hex ints
@"|half|float|double" + // float types
@"|vec|uvec|ivec" + // OpenGL vector types
@"|mat|umat|imat" + // OpenGL matrix types
@")" +
@"([1-9])?" + // might be a vector
@"(x[1-9])?" + // or a matrix
@"(\s+[A-Za-z_][A-Za-z0-9_]*)?" + // get identifier name
@"(\[[0-9]+\])?" + // optional array dimension
@"(\s*:\s*[A-Za-z_][A-Za-z0-9_]*)?" + // optional semantic
@"$";
Regex regParser = new Regex(regExpr, RegexOptions.Compiled);
bool success = true;
errors = "";
var text = formatReader.ReadToEnd();
text = text.Replace("{", "").Replace("}", "");
Regex c_comments = new Regex(@"/\*[^*]*\*+(?:[^*/][^*]*\*+)*/", RegexOptions.Compiled);
text = c_comments.Replace(text, "");
Regex cpp_comments = new Regex(@"//.*", RegexOptions.Compiled);
text = cpp_comments.Replace(text, "");
uint offset = 0;
// get each line and parse it to determine the format the user wanted
foreach (var l in text.Split(';'))
{
var line = l;
line = line.Trim();
if (line.Length == 0)
{
continue;
}
var match = regParser.Match(line);
if (!match.Success)
{
errors = "Couldn't parse line:\n" + line;
success = false;
break;
}
var basetype = match.Groups[2].Value;
bool row_major = match.Groups[1].Success;
var vectorDim = match.Groups[3].Success ? match.Groups[3].Value : "1";
var matrixDim = match.Groups[4].Success ? match.Groups[4].Value.Substring(1) : "1";
var name = match.Groups[5].Success ? match.Groups[5].Value.Trim() : "data";
var arrayDim = match.Groups[6].Success ? match.Groups[6].Value.Trim() : "[1]";
arrayDim = arrayDim.Substring(1, arrayDim.Length - 2);
if (match.Groups[4].Success)
{
var a = vectorDim;
vectorDim = matrixDim;
matrixDim = a;
}
ResourceFormat fmt = new ResourceFormat(FormatComponentType.None, 0, 0);
bool hex = false;
FormatComponentType type = FormatComponentType.Float;
uint count = 0;
uint arrayCount = 1;
uint matrixCount = 0;
uint width = 0;
// check for square matrix declarations like 'mat4' and 'mat3'
if (basetype == "mat" && !match.Groups[4].Success)
{
matrixDim = vectorDim;
}
// calculate format
{
if (!uint.TryParse(vectorDim, out count))
{
errors = "Invalid vector dimension on line:\n" + line;
success = false;
break;
}
if (!uint.TryParse(arrayDim, out arrayCount))
{
arrayCount = 1;
}
arrayCount = Math.Max(0, arrayCount);
if (!uint.TryParse(matrixDim, out matrixCount))
{
errors = "Invalid matrix second dimension on line:\n" + line;
success = false;
break;
}
if (basetype == "bool")
{
type = FormatComponentType.UInt;
width = 4;
}
else if (basetype == "byte")
{
type = FormatComponentType.SInt;
width = 1;
}
else if (basetype == "ubyte" || basetype == "xbyte")
{
type = FormatComponentType.UInt;
width = 1;
}
else if (basetype == "short")
{
type = FormatComponentType.SInt;
width = 2;
}
else if (basetype == "ushort" || basetype == "xshort")
{
type = FormatComponentType.UInt;
width = 2;
}
else if (basetype == "int" || basetype == "ivec" || basetype == "imat")
{
type = FormatComponentType.SInt;
width = 4;
}
else if (basetype == "uint" || basetype == "xint" || basetype == "uvec" || basetype == "umat")
{
type = FormatComponentType.UInt;
width = 4;
}
else if (basetype == "half")
{
type = FormatComponentType.Float;
width = 2;
}
else if (basetype == "float" || basetype == "vec" || basetype == "mat")
{
type = FormatComponentType.Float;
width = 4;
}
else if (basetype == "double")
{
type = FormatComponentType.Double;
width = 8;
}
else if (basetype == "unormh")
{
type = FormatComponentType.UNorm;
width = 2;
}
else if (basetype == "unormb")
{
type = FormatComponentType.UNorm;
width = 1;
}
else if (basetype == "snormh")
{
type = FormatComponentType.SNorm;
width = 2;
}
else if (basetype == "snormb")
{
type = FormatComponentType.SNorm;
width = 1;
}
else if (basetype == "uintten")
{
fmt = new ResourceFormat(FormatComponentType.UInt, 4 * count, 1);
fmt.special = true;
fmt.specialFormat = SpecialFormat.R10G10B10A2;
}
else if (basetype == "unormten")
{
fmt = new ResourceFormat(FormatComponentType.UNorm, 4 * count, 1);
fmt.special = true;
fmt.specialFormat = SpecialFormat.R10G10B10A2;
}
else
{
errors = "Unrecognised basic type on line:\n" + line;
success = false;
break;
}
}
if (basetype == "xint" || basetype == "xshort" || basetype == "xbyte")
{
hex = true;
}
if (fmt.compType == FormatComponentType.None)
{
fmt = new ResourceFormat(type, count, width);
}
if (arrayCount == 1)
{
FormatElement elem = new FormatElement(name, 0, offset, false, 1, row_major, matrixCount, fmt, hex);
uint advance = elem.ByteSize;
if (!tightPacking)
{
// cbuffer packing always works in floats
advance = (advance + 3U) & (~3U);
// cbuffer packing doesn't allow elements to cross float4 boundaries, nudge up if this was the case
if (offset / 16 != (offset + elem.ByteSize - 1) / 16)
{
elem.offset = offset = (offset + 0xFU) & (~0xFU);
}
}
elems.Add(elem);
offset += advance;
}
else
{
// when cbuffer packing, arrays are always aligned at float4 boundary
if (!tightPacking)
{
if (offset % 16 != 0)
{
offset = (offset + 0xFU) & (~0xFU);
}
}
for (uint a = 0; a < arrayCount; a++)
{
FormatElement elem = new FormatElement(String.Format("{0}[{1}]", name, a), 0, offset, false, 1, row_major, matrixCount, fmt, hex);
elems.Add(elem);
uint advance = elem.ByteSize;
// cbuffer packing each array element is always float4 aligned
if (!tightPacking)
{
advance = (advance + 0xFU) & (~0xFU);
}
offset += advance;
}
}
}
if (!success || elems.Count == 0)
{
elems.Clear();
var fmt = new ResourceFormat(FormatComponentType.UInt, 4, 4);
if (maxLen > 0 && maxLen < 16)
{
fmt.compCount = 1;
}
if (maxLen > 0 && maxLen < 4)
{
fmt.compByteWidth = 1;
}
elems.Add(new FormatElement("data", 0, 0, false, 1, false, 1, fmt, true));
}
return(elems.ToArray());
}