struct UniformTypeName
{
std::string name;
E_UniformType type;
};
static UniformTypeName _datatypeToGlsl[17] = {
{"float", UT_FLOAT}, {"vec2", UT_FLOAT_VEC2}, {"vec3", UT_FLOAT_VEC3}, {"vec4", UT_FLOAT_VEC4},
{"int", UT_INT}, {"ivec2", UT_INT_VEC2}, {"ivec3",UT_INT_VEC3}, {"ivec4", UT_INT_VEC4},
{"bool",UT_BOOL}, {"bvec2", UT_BOOL_VEC2}, {"bvec3",UT_BOOL_VEC3}, {"bvec4", UT_BOOL_VEC4},
{"mat2", UT_FLOAT_MAT2}, {"mat3", UT_FLOAT_MAT3}, {"mat4", UT_FLOAT_MAT4},
{"sampler2D", UT_SAMPLER_2D},{"samplerCube", UT_SAMPLER_CUBE}};
class AutomaticUniformBase: public UniformBase
{
public:
AutomaticUniformBase(){}
~AutomaticUniformBase(){}
std::string getDeclaration(const std::string& name)
{
std::string declaration = "uniform " + getDataTypeName(this->_datatype) + " " + name;
std::stringstream sizestr;
sizestr<<_size;
if (_size == 1) {
declaration += ";";
} else {
declaration += "[" + sizestr.str() + "];";
}
return declaration;
}
std::string getDataTypeName(E_UniformType typeEnum)
{
std::string result("");
for(int i = 0; i< sizeof(_datatypeToGlsl); i++)
{
if(typeEnum == _datatypeToGlsl[i].type)
{
result = _datatypeToGlsl[i].name;
break;
}
}
return result;
}
};
template<class T>
class AutomaticUniform: public AutomaticUniformBase
{
public:
AutomaticUniform()
{
this->_uniformClassType = UCT_AUTO;
}
typedef T (* GetValueFunc)(UniformState*);
AutomaticUniform( unsigned int size, E_UniformType type, GetValueFunc getValue)
{
this->_size = size;
this->_datatype = type;
this->_getValue = getValue;
this->_uniformClassType = UCT_AUTO;
}
struct Option
{
unsigned int _size;
E_UniformType _datatype;
GetValueFunc _getValue;
};
AutomaticUniform(const Option& option)
{
this->_size = option._size;
this->_datatype = option._datatype;
this->_getValue = option._getValue;
this->_uniformClassType = UCT_AUTO;
}
public:
GetValueFunc _getValue;
};