void OpenGLShaderPointLight::init(uint32_t bindingPoint, uint32_t lightIndex)
{
setBlockName("PointLight");
setBindingPoint(bindingPoint);
setBlockArrayIndex(lightIndex);
addParamName("position");
addParamName("ambient");
addParamName("diffuse");
addParamName("specular");
addParamName("attenuation");
addParamName("cutoff");
}
void
OGLShaderObject::_initActiveUniform() noexcept
{
GLint numUniform = 0;
GLint maxUniformLength = 0;
GLint numTexUnit = 0;
glGetProgramiv(_program, GL_ACTIVE_UNIFORMS, &numUniform);
glGetProgramiv(_program, GL_ACTIVE_UNIFORM_MAX_LENGTH, &maxUniformLength);
if (numUniform == 0)
return;
auto nameUniform = std::make_unique<GLchar[]>(maxUniformLength + 1);
nameUniform[maxUniformLength] = 0;
for (GLint i = 0; i < numUniform; ++i)
{
GLint size;
GLenum type;
glGetActiveUniform(_program, (GLuint)i, maxUniformLength, 0, &size, &type, nameUniform.get());
if (std::strstr(nameUniform.get(), ".") != 0 || nameUniform[0] == '_')
continue;
GLuint location = glGetUniformLocation(_program, nameUniform.get());
if (location == GL_INVALID_INDEX)
continue;
auto uniform = std::make_shared<ShaderUniform>();
uniform->setName(nameUniform.get());
uniform->setLocation(location);
uniform->setBindingProgram(_program);
if (type == GL_SAMPLER_2D || type == GL_SAMPLER_3D ||
type == GL_SAMPLER_2D_SHADOW ||
type == GL_SAMPLER_2D_ARRAY || type == GL_SAMPLER_CUBE ||
type == GL_SAMPLER_2D_ARRAY_SHADOW || type == GL_SAMPLER_CUBE_SHADOW)
{
uniform->setType(SPT_TEXTURE);
uniform->setBindingPoint(numTexUnit++);
}
else
{
bool isArray = uniform->getName().find("[0]") != std::string::npos;
if (type == GL_BOOL)
uniform->setType(SPT_BOOL);
else if (type == GL_INT)
uniform->setType(SPT_INT);
else if (type == GL_INT_VEC2)
uniform->setType(SPT_INT2);
else if (type == GL_FLOAT)
{
if (isArray)
uniform->setType(SPT_FLOAT_ARRAY);
else
uniform->setType(SPT_FLOAT);
}
else if (type == GL_FLOAT_VEC2)
{
if (isArray)
uniform->setType(SPT_FLOAT2_ARRAY);
else
uniform->setType(SPT_FLOAT2);
}
else if (type == GL_FLOAT_VEC3)
{
if (isArray)
uniform->setType(SPT_FLOAT3_ARRAY);
else
uniform->setType(SPT_FLOAT3);
}
else if (type == GL_FLOAT_VEC4)
{
if (isArray)
uniform->setType(SPT_FLOAT4_ARRAY);
else
uniform->setType(SPT_FLOAT4);
}
else if (type == GL_FLOAT_MAT3)
uniform->setType(SPT_FLOAT3X3);
else if (type == GL_FLOAT_MAT4)
uniform->setType(SPT_FLOAT4X4);
else
assert(false);
}
_activeUniforms.push_back(uniform);
}
}
