UniformVar RmPass::searchUniformVariable(QString &name, CodeType codetype)
{
QString &source = (codetype == FRAGMENT) ? fragment : vertex;
int namelen = name.length();
int start = 0;
int pos_name, pos_unif;
while( (pos_name = source.indexOf(name, start)) != -1) {
start += namelen;
if ((pos_unif = source.lastIndexOf("uniform", pos_name)) == -1)
continue;
QString declaration =
source.mid(pos_unif, pos_name - pos_unif + namelen + 1);
QStringList list = declaration.split(QRegExp("\\s+"));
if (list.size() != 3 ||
list[0] != "uniform" ||
(list[2] != name && list[2] != name + QString(";")))
continue;
return UniformVar(name, list[1],
UniformVar::getTypeFromString(list[1]));
}
return UniformVar();
}
UniformBuffer::UniformVar UniformBuffer::operator [] (const std::string& _name)
{
// Cannot access unknown attribute!
Assert(m_attributes.find(_name) != m_attributes.end(), "Cannot access unknown attribute!");
return UniformVar((uint8*)m_memory + m_attributes[_name], this);
}
const UniformBuffer::UniformVar UniformBuffer::operator [] ( const std::string& _name ) const
{
// Cannot access unknown attribute!
Assert(m_attributes.find(_name) != m_attributes.end(), "Cannot access unknown attribute!");
// Give a nullptr instead of a buffer - it is only accessed during write
return UniformVar((uint8*)m_memory + m_attributes.at(_name), nullptr);
}
UniformVar::List GLProgram::getUniformList()
{
glCheck("GLProgram::getUniformList");
UniformVar::List list;
GLint num = 0, buffer_size = 0;
glRun(glGetProgramiv(m_prog, GL_ACTIVE_UNIFORMS, &num));
glRun(glGetProgramiv(m_prog, GL_ACTIVE_UNIFORM_MAX_LENGTH, &buffer_size));
std::vector<GLchar> name(buffer_size);
for (GLint i = 0; i < num; i++) {
GLsizei length;
GLint size;
GLenum type;
glRun(glGetActiveUniform(m_prog, i, buffer_size,
&length, &size, &type, &name[0]));
// For now skip build-in uniforms, since those can't be changed the same way as others.
if (strncmp(&name[0], "gl_", 3) != 0)
list.push_back(UniformVar(shared_from_this(), &name[0], type));
}
return list;
}
