void cub_XmlAttribute_forEach(const char *attributes, cub_XmlAttributeCallback callback)
{
char *buffer = strcpy(malloc(strlen(attributes) + 1), attributes);
char *ptr = buffer;
Attribute a = {0};
while (extractAttributes(&ptr, &a))
if(!callback(a.name, a.value))
break;
free(buffer);
}
//-----------------------------------------------------------------------
void GLSLLinkProgram::activate(void)
{
if (!mLinked)
{
if (mVertexProgram)
{
// Some drivers (e.g. OS X on nvidia) incorrectly determine the attribute binding automatically
// and end up aliasing existing built-ins. So avoid!
// Bind all used attribs - not all possible ones otherwise we'll get
// lots of warnings in the log, and also may end up aliasing names used
// as varyings by accident
// Because we can't ask GL whether an attribute is used in the shader
// until it is linked (chicken and egg!) we have to parse the source
size_t numAttribs = sizeof(msCustomAttributes)/sizeof(CustomAttribute);
const String& vpSource = mVertexProgram->getGLSLProgram()->getSource();
for (size_t i = 0; i < numAttribs; ++i)
{
const CustomAttribute& a = msCustomAttributes[i];
// we're looking for either:
// attribute vec<n> <semantic_name>
// in vec<n> <semantic_name>
// The latter is recommended in GLSL 1.3 onwards
// be slightly flexible about formatting
String::size_type pos = vpSource.find(a.name);
if (pos != String::npos)
{
String::size_type startpos = vpSource.find("attribute", pos < 20 ? 0 : pos-20);
if (startpos == String::npos)
startpos = vpSource.find("in", pos-20);
if (startpos != String::npos && startpos < pos)
{
// final check
String expr = vpSource.substr(startpos, pos + a.name.length() - startpos);
StringVector vec = StringUtil::split(expr);
if ((vec[0] == "in" || vec[0] == "attribute") && vec[2] == a.name)
glBindAttribLocationARB(mGLHandle, a.attrib, a.name.c_str());
}
}
}
}
if (mGeometryProgram)
{
RenderOperation::OperationType inputOperationType = mGeometryProgram->getGLSLProgram()->getInputOperationType();
glProgramParameteriEXT(mGLHandle,GL_GEOMETRY_INPUT_TYPE_EXT,
getGLGeometryInputPrimitiveType(inputOperationType, mGeometryProgram->isAdjacencyInfoRequired()));
RenderOperation::OperationType outputOperationType = mGeometryProgram->getGLSLProgram()->getOutputOperationType();
switch (outputOperationType)
{
case RenderOperation::OT_POINT_LIST:
case RenderOperation::OT_LINE_STRIP:
case RenderOperation::OT_TRIANGLE_STRIP:
case RenderOperation::OT_LINE_LIST:
case RenderOperation::OT_TRIANGLE_LIST:
case RenderOperation::OT_TRIANGLE_FAN:
break;
}
glProgramParameteriEXT(mGLHandle,GL_GEOMETRY_OUTPUT_TYPE_EXT,
getGLGeometryOutputPrimitiveType(outputOperationType));
glProgramParameteriEXT(mGLHandle,GL_GEOMETRY_VERTICES_OUT_EXT,
mGeometryProgram->getGLSLProgram()->getMaxOutputVertices());
}
glLinkProgramARB( mGLHandle );
glGetObjectParameterivARB( mGLHandle, GL_OBJECT_LINK_STATUS_ARB, &mLinked );
// force logging and raise exception if not linked
checkForGLSLError( "GLSLLinkProgram::Activate",
"Error linking GLSL Program Object : ", mGLHandle, !mLinked, !mLinked );
if(mLinked)
{
logObjectInfo( String("GLSL link result : "), mGLHandle );
buildGLUniformReferences();
extractAttributes();
}
}
if (mLinked)
{
checkForGLSLError( "GLSLLinkProgram::Activate",
"Error prior to using GLSL Program Object : ", mGLHandle, false, false);
glUseProgramObjectARB( mGLHandle );
checkForGLSLError( "GLSLLinkProgram::Activate",
"Error using GLSL Program Object : ", mGLHandle, false, false);
}
}
