shaderSource method
Implementation
void shaderSource(v0, String shaderSource) {
var sourceString = shaderSource.toNativeUtf8();
var arrayPointer = calloc<Pointer<Int8>>();
arrayPointer.value = Pointer.fromAddress(sourceString.address);
gl.glShaderSource(v0, 1, arrayPointer, nullptr);
calloc.free(arrayPointer);
calloc.free(sourceString);
}