//---------------------------------------------------------------------------------------------------------------
// This function checks if argument is constant. If it is it returns true, overwise false
//---------------------------------------------------------------------------------------------------------------
static bool GetConstantIDFromArgument(gtASCIIString sArgument, gtASCIIString cKey, unsigned int& nSlotID)
{
unsigned int nKeyPosition = (unsigned int)sArgument.find(cKey);
// Check if cKey is not end of other argument
if (nKeyPosition == std::string::npos || (nKeyPosition != 0
&& sArgument[nKeyPosition - 1] != '>' // code can be in HTML
&& sArgument[nKeyPosition - 1] != ' '))
{
return false;
} // End of if
// Looking for not digital symbols in argument
unsigned int nNextNotDigit = (unsigned int)sArgument.find_first_not_of("0123456789", nKeyPosition + cKey.length());
gtASCIIString sSlotID; // this variable contains string with the slot number
if (nNextNotDigit == std::string::npos) // All character after cKey are digits
{
sSlotID = sArgument.substr(nKeyPosition + cKey.length());
} // End of if
// Check if the variable is finished with digit
else if ((sArgument[nNextNotDigit] != '<' && sArgument[nNextNotDigit] != ' ' && sArgument[nNextNotDigit] != ',' &&
sArgument[nNextNotDigit] != '.' && sArgument[nNextNotDigit] != '[' && sArgument[nNextNotDigit] != '\n')
|| nNextNotDigit <= nKeyPosition + 1)
{
return false;
} // End of else if
else
{
sSlotID = sArgument.substr(nKeyPosition + cKey.length(), nNextNotDigit - nKeyPosition - cKey.length());
} // End of else
int nScanRes = sscanf_s(sSlotID.asCharArray(), "%d", &nSlotID);
if (nScanRes < 1)
{
Log(logERROR, "%s: Failed to read integer from Str = %s\n", __FUNCTION__, sSlotID.asCharArray());
return false;
}
return true;
}// End of GetConstantIDFromArgument
//---------------------------------------------------------------------------------------------------------------
// This function returns of slots used in code
// cKey is symbol which shows what kind of slots are requested: 'c' for float constants, 'b' for boolean
// constants etc. Results are kept in usedSlots.
//---------------------------------------------------------------------------------------------------------------
long GetConstantsFromCode(gtASCIIString code, gtASCIIString cKey, std::list<unsigned long>& usedSlots)
{
long hr = 0;
typedef std::map< gtASCIIString, std::vector<unsigned long> > ArgumentType;
typedef std::map< gtASCIIString, std::vector<unsigned long> >::iterator ArgumentIter;
ArgumentType ArgumentLength;
ArgumentIter ArgIter;
// This map contains infoemation about arguments lenth
// i.e the third argument of the m4x4 itstruction is 4x4 matrix,
// which uses 4 slots, so if shader has instruction m4x4 oPos, v0, c0 it means
// c0, c1, c3 and c4 are used, that is why ArgumentLength["m4x4"][2] = 4
ArgumentLength["m3x2"].resize(3);
ArgumentLength["m3x2"][0] = 1;
ArgumentLength["m3x2"][1] = 1;
ArgumentLength["m3x2"][2] = 2;
ArgumentLength["m3x3"].resize(3);
ArgumentLength["m3x3"][0] = 1;
ArgumentLength["m3x3"][1] = 1;
ArgumentLength["m3x3"][2] = 3;
ArgumentLength["m3x4"].resize(3);
ArgumentLength["m3x4"][0] = 1;
ArgumentLength["m3x4"][1] = 1;
ArgumentLength["m3x4"][2] = 4;
ArgumentLength["m4x3"].resize(3);
ArgumentLength["m4x3"][0] = 1;
ArgumentLength["m4x3"][1] = 1;
ArgumentLength["m4x3"][2] = 3;
ArgumentLength["m4x4"].resize(3);
ArgumentLength["m4x4"][0] = 1;
ArgumentLength["m4x4"][1] = 1;
ArgumentLength["m4x4"][2] = 4;
ArgumentLength["texm3x2depth"].resize(2);
ArgumentLength["texm3x2depth"][0] = 3;
ArgumentLength["texm3x2depth"][1] = 2;
ArgumentLength["texm3x2pad"].resize(2);
ArgumentLength["texm3x2pad"][0] = 3;
ArgumentLength["texm3x2pad"][1] = 2;
ArgumentLength["texm3x2tex"].resize(2);
ArgumentLength["texm3x2tex"][0] = 3;
ArgumentLength["texm3x2tex"][1] = 2;
ArgumentLength["texm3x3"].resize(2);
ArgumentLength["texm3x3"][0] = 3;
ArgumentLength["texm3x3"][1] = 3;
ArgumentLength["texm3x3pad"].resize(2);
ArgumentLength["texm3x3pad"][0] = 3;
ArgumentLength["texm3x3pad"][1] = 3;
ArgumentLength["texm3x3spec"].resize(2);
ArgumentLength["texm3x3spec"][0] = 3;
ArgumentLength["texm3x3spec"][1] = 3;
ArgumentLength["texm3x3tex"].resize(2);
ArgumentLength["texm3x3tex"][0] = 3;
ArgumentLength["texm3x3tex"][1] = 3;
ArgumentLength["texm3x3vspec"].resize(2);
ArgumentLength["texm3x3vspec"][0] = 3;
ArgumentLength["texm3x3vspec"][1] = 3;
unsigned int nStartOfToken = 0;
// This loop splits code to tokens
while (nStartOfToken != std::string::npos)
{
unsigned int nNextToken = (unsigned int)code.find('\n', nStartOfToken + 1);
// comment
gtASCIIString sToken = (nNextToken == std::string::npos) ? code.substr(nStartOfToken) : code.substr(nStartOfToken, nNextToken - nStartOfToken);
if (sToken.length() > 1 && sToken.substr(0, 1) != "//") // Skip comments and empty strings
{
unsigned int nStartOfInstruction = (unsigned int)sToken.find_first_not_of(" \n", 0); // comment
unsigned int nEndOfInstruction = (unsigned int)sToken.find(' ', nStartOfInstruction);
if (nEndOfInstruction == std::string::npos)
{
nStartOfToken = nNextToken;
continue;
}
gtASCIIString sCommand = sToken.substr(nStartOfInstruction, nEndOfInstruction - nStartOfInstruction);
unsigned int nArgument = 0;
unsigned int nStartOfArgument = nEndOfInstruction + 1;
unsigned int nEndOfArgument;
do // This separates arguments of command
{
nEndOfArgument = (unsigned int)sToken.find(',', nStartOfArgument);
gtASCIIString sArgument = (nEndOfArgument == std::string::npos) ?
sToken.substr(nStartOfArgument) :
sToken.substr(nStartOfArgument, nEndOfArgument - nStartOfArgument);
unsigned int nSlotID;
if (GetConstantIDFromArgument(sArgument, cKey, nSlotID) == false)
{
nArgument++;
nStartOfArgument = nEndOfArgument + 1;
continue;
}
// Calculation of used constants. Default is 1. Next 2 lines check if the command in "special cases map"
ArgIter = ArgumentLength.find(sCommand);
int nArgsCount = (ArgIter == ArgumentLength.end()) ? 1 : // If coommand has not been find the lenth of argument is supposed 1
(ArgIter->second.size() > nArgument ? ArgIter->second[nArgument] :
1); // If there no information for considered argument its lenth is supposed 1
// This loop adds variables in the used constants list
for (unsigned int i = nSlotID; i < nSlotID + nArgsCount; i++)
{
bool nNotFind = true;
for (std::list<unsigned long>::const_iterator iter = usedSlots.begin(); iter != usedSlots.end(); ++iter)
{
if (*iter == i)
{
nNotFind = false;
break;
}
}
if (nNotFind)
{
usedSlots.push_back(i);
} // End of if
}// End of for
nArgument++;
nStartOfArgument = nEndOfArgument + 1;
}
while (nEndOfArgument != std::string::npos);
} // End of if ( sToken.size() > 1 && sToken.substr( 0, 1 ) != "//" )
nStartOfToken = nNextToken;
}// End of while ( nFound != string::npos )
return hr;
}// End of GetConstantsFromCode
