int XmlToKross::start()
{
inclass=0;
while (!xml.atEnd())
{
QXmlStreamReader::TokenType t=xml.readNext();
QString str;
switch(t)
{
case QXmlStreamReader::Invalid:
qDebug() << "invalid token!" << xml.errorString() << endl;
break;
case QXmlStreamReader::StartDocument:
writeDocument();
break;
case QXmlStreamReader::StartElement:
// qDebug() << "Element " << xml.name().toString() << endl;
str=xml.name().toString();
if(str=="Class")
{
inclass++;
if(inclass==1) writeClass(xml.attributes().value(QString(), "name").toString(), QString(), QList<QStringList>());
}
else if(str=="Function")
{
QString funcname=xml.attributes().value(QString(), "name").toString();
QString rettype=xml.attributes().value(QString(), "type_name").toString();
bool isConst=xml.attributes().value(QString(), "constant").toString()==QChar('1');
bool isVirtual=xml.attributes().value(QString(), "virtual").toString()==QChar('1');
currentMethod=method();
currentMethod.access=xml.attributes().value(QString(), "access").toString();
currentMethod.funcname=funcname;
currentMethod.returnType=rettype;
currentMethod.isConst=isConst;
currentMethod.isVirtual=isVirtual;
if(!definedClasses.isEmpty() && ( funcname==definedClasses.last() || funcname=='~'+definedClasses.last() ) )
currentMethod.access="constructor";
}
else if(str=="Argument")
{
method::argument arg;
arg.name=xml.attributes().value(QString(), "name").toString();
arg.type=xml.attributes().value(QString(), "type_name").toString();
arg.def=xml.attributes().value(QString(), "defaultvalue").toString();
QString context=xml.attributes().value(QString(), "context").toString();
if(!arg.def.isEmpty() && arg.type.startsWith(context))
arg.def.prepend(context+"::");
currentMethod.args.append(arg);
}
else if(str=="Namespace")
{
QString name=xml.attributes().value(QString(), "name").toString();
qDebug() << "entering to namespace " << name << inNamespace;
if(inNamespace!=name)
{
if(!inNamespace.isEmpty())
inNamespace.append("::");
inNamespace.append(name);
writeNamespace(name);
qDebug() << "current status" << inNamespace;
}
}
else if(str=="Variable" && inclass==1 &&
xml.attributes().value(QString(), "access").toString()=="public")
{
writeVariable(xml.attributes().value(QString(), "name").toString(),
xml.attributes().value(QString(), "type_name").toString(), xml.attributes().value(QString(), "type_constant").toString()=="1");
}
else if(str=="Enum")
{
flags.clear();
flags.append(xml.attributes().value(QString(), "name").toString());
}
else if(str=="Enumerator")
flags.append(xml.attributes().value(QString(), "name").toString());
break;
case QXmlStreamReader::EndDocument:
writeEndDocument();
break;
case QXmlStreamReader::EndElement:
str=xml.name().toString();
if(str=="Class")
{
if(inclass==1) writeEndClass();
inclass--;
}
else if(str=="Function" && currentMethod.access=="public" && inclass==1)
writeEndFunction(currentMethod);
else if(str=="Enum")
writeEndEnum(flags);
else if(str=="Namespace")
{
inNamespace.resize(inNamespace.lastIndexOf("::"));
}
break;
default:
break;
}
}
if (xml.error())
{
qDebug() << "error!" << xml.errorString();
return 2;
}
return 0;
}
int
main(int argc,
char** argv)
{
if (argc != 6) {
std::cout << "This program takes in input glad.h and outputs the include and implementation files for OSMesa OpenGL function and regular OpenGL functions." << std::endl;
std::cout << "Usage: generateGLIncludes <glad.h path> <output dir path> <namespace name> <baseFileName> <inlcude glad debug symbols>" << std::endl;
std::cout << "Example: generateGLIncludes /Users/alexandre/development/Natron/Global/gladRel/include/glad/glad.h /Users/alexandre/development/Natron/Engine Natron OSGLFunctions 1" << std::endl;
return 1;
}
QFile f(argv[1]);
if ( !f.open(QIODevice::ReadOnly) ) {
std::cout << "Could not open " << argv[1] << std::endl;
return 1;
}
// Check that output path exists
QDir outputDir(argv[2]);
if ( !outputDir.exists() ) {
std::cout << argv[2] << " does not seem to be a valid directory" << std::endl;
return 1;
}
QString namespaceName(argv[3]);
QString baseFilename(argv[4]);
bool supportGladDebug;
{
QString supportDebugSymbolsStr(argv[5]);
supportGladDebug = (bool)supportDebugSymbolsStr.toInt();
}
QString absoluteDirPath = outputDir.absolutePath();
QString outputHeaderFilename = absoluteDirPath + "/" + baseFilename + ".h";
QFile of_header(outputHeaderFilename);
if ( !of_header.open(QIODevice::WriteOnly) ) {
std::cout << "Could not open " << outputHeaderFilename.toStdString() << std::endl;
return 1;
}
QTextStream ots_header(&of_header);
QTextStream its(&f);
QString definesStr;
std::list<FunctionSignature> signatures;
QString functionTypedefsStr;
QString prevLine;
while ( !its.atEnd() ) {
// Read each line of glad.h
QString line = its.readLine();
{
// Search for a define
QString toFind = "#define GL_";
int found = line.indexOf(toFind);
if (found != -1) {
definesStr += line;
definesStr += "\n";
}
}
// Search for a function
QString typedefToken("typedef ");
QString pfnToken("(APIENTRYP PFNGL");
int foundFuncDef = line.indexOf(typedefToken);
int foundPNFToken = line.indexOf(pfnToken);
if ( (foundFuncDef != -1) && (foundPNFToken != -1) ) {
int pos = foundPNFToken + pfnToken.size();
int foundFirstEndParenthesis = line.indexOf(')', pos);
assert(foundFirstEndParenthesis != -1);
FunctionSignature signature;
QString lastFuncNameCaps = line.mid(pos, foundFirstEndParenthesis - pos);
signature.signature = line.mid(foundFirstEndParenthesis);
// "near" and "far" are defined as macros in windows.h
signature.signature.replace("GLdouble near, GLdouble far", "GLdouble nearVal, GLdouble farVal");
signature.returnType = line.mid( foundFuncDef + typedefToken.size(), foundPNFToken - 1 - ( foundFuncDef + typedefToken.size() ) );
QString funcTypeDefStr = "typedef ";
funcTypeDefStr += signature.returnType;
funcTypeDefStr += " (*PFNGL";
funcTypeDefStr += lastFuncNameCaps;
funcTypeDefStr += signature.signature;
funcTypeDefStr += "\n";
functionTypedefsStr += funcTypeDefStr;
// Remove the extraneous ; at the end of the signature
// Also remove the prepending )
signature.signature.remove(0, 1);
signature.signature.remove(signature.signature.size() - 1, 1);
signature.funcPNType = "PFNGL";
signature.funcPNType += lastFuncNameCaps;
// extract parameters
{
int i = 1; // start after the leading (
while ( i < signature.signature.size() ) {
QString param;
while ( signature.signature[i] != QChar(',') && signature.signature[i] != QChar(')') ) {
param.append(signature.signature[i]);
++i;
}
// Now only keep the name of the parameter
{
int j = param.size() - 1;
while ( j >= 0 && param[j].isLetterOrNumber() ) {
--j;
}
param = param.mid(j + 1);
}
signature.parameters.append(param);
assert( signature.signature[i] == QChar(',') || signature.signature[i] == QChar(')') );
++i; // bypass last character
if ( signature.signature[i] == QChar(')') ) {
break;
}
}
}
// we caught a function typedef before, we expect to read the following #define glXxxx function with the appropriate case
// in release glad.h, the next line is of the type GLAPI PFNGLCOLOR4FVPROC glad_glColor4fv;
// the line after that is the one we want #define glColor4fv glad_glColor4fv
line = its.readLine();
assert( !its.atEnd() );
line = its.readLine();
QString toFind("#define gl");
int foundDefine = line.indexOf(toFind);
if (foundDefine == -1) {
std::cout << "Parser failed to find #define glXXX statement 2 lines after a function typedef, make sure that you are running this program against a release version of glad.h" << std::endl;
return 1;
}
// Check that this is the same symbol
// Remove the PROC at the end of the func def
lastFuncNameCaps.remove("PROC");
int checkIndex = toFind.size();
QString symbolStart = line.mid(checkIndex);
assert( symbolStart.startsWith(lastFuncNameCaps, Qt::CaseInsensitive) );
{
int i = 8; // start on the g
//extract the function name
while ( i < line.size() && line.at(i) != QChar(' ') ) {
signature.funcName.push_back( line.at(i) );
++i;
}
}
signatures.push_back(signature);
} // if (foundFuncDef != -1 && foundPNFToken != -1) {
prevLine = line;
}
writeHeader(ots_header);
writePODs(ots_header);
ots_header <<
definesStr << "\n"
"\n";
ots_header <<
functionTypedefsStr << "\n"
"\n";
writeStartClass(namespaceName, ots_header);
// Define the singleton
ots_header <<
" static OSGLFunctions<USEOPENGL>& getInstance()\n"
" {\n"
" static OSGLFunctions<USEOPENGL> instance;\n"
"\n"
" return instance;\n"
" }\n"
"\n"
" // load function, implemented in _gl.h and _mesa.h\n"
" void load_functions();\n"
"\n"
" // private constructor\n"
" OSGLFunctions() { load_functions(); }\n"
"\n";
// Declare member functions
for (std::list<FunctionSignature>::iterator it = signatures.begin(); it != signatures.end(); ++it) {
ots_header << " " << it->funcPNType << " _" << it->funcName << ";\n";
}
ots_header <<
"\n";
ots_header <<
"public:\n"
"\n";
ots_header <<
" // static non MT-safe load function that must be called once to initialize functions\n"
" static void load()\n"
" {\n"
" (void)getInstance();\n"
" }\n"
"\n"
" static bool isGPU()\n"
" {\n"
" return USEOPENGL;\n"
" }\n";
for (std::list<FunctionSignature>::iterator it = signatures.begin(); it != signatures.end(); ++it) {
QString lineStart = " static " + it->returnType + " " + it->funcName;
QString indentedSig = it->signature;
indentedSig.replace( ", ", ",\n" + QString(lineStart.size() + 1, ' ') );
ots_header << "\n" <<
lineStart << indentedSig << "\n"
" {\n";
if (it->returnType == "void") {
ots_header << " ";
} else {
ots_header << " return ";
}
ots_header << "getInstance()._" << it->funcName << "(";
QStringList::const_iterator next = it->parameters.begin();
if ( !it->parameters.isEmpty() ) {
++next;
}
for (QStringList::const_iterator it2 = it->parameters.begin(); it2 != it->parameters.end(); ++it2) {
ots_header << *it2;
if ( next != it->parameters.end() ) {
ots_header << ", ";
++next;
}
}
ots_header <<
");\n"
" }\n";
}
writeEndClass(namespaceName, ots_header);
writeFooter(ots_header);
writeImplementationCppFile(namespaceName, baseFilename, signatures, absoluteDirPath, "gl", true, supportGladDebug);
writeImplementationCppFile(namespaceName, baseFilename, signatures, absoluteDirPath, "mesa", false, supportGladDebug);
return 0;
} // main
