void process_vertex_attribute(
OpenGLContext& openGLContext,
OpenGLShaderProgram& shader,
std::string name,
size_t stride_bytes,
size_t offset_bytes
)
{
// e.g. float[3] -> float and 3
using Type = typename remove_extent<Tn>::type;
static constexpr size_t dim = extent<Tn>::value;
GLint location = openGLContext.extensions.glGetAttribLocation(shader.getProgramID(), attributeName);
if( location == -1 )
return nullptr; // not found in shader
OpenGLShaderProgram::Attribute gl_attribute = new OpenGLShaderProgram::Attribute (shader, attributeName);
if( gl_attribute == nullptr )
return nullptr;
generic_glVertexAttribPointer<Type>(
attribNumber->attributeID,
dim,
vec_bytes,
(const GLvoid *)offset_bytes
);
glEnableVertexAttribArray( attribNumber->attributeID );
}
OpenGLShaderProgram::Attribute::Attribute (const OpenGLShaderProgram& program, const char* name)
: attributeID (program.context.extensions.glGetAttribLocation (program.getProgramID(), name))
{
jassert (attributeID >= 0);
}
OpenGLShaderProgram::Uniform::Uniform (const OpenGLShaderProgram& program, const char* const name)
: uniformID (program.context.extensions.glGetUniformLocation (program.getProgramID(), name)), context (program.context)
{
jassert (uniformID >= 0);
}
