Croissant Runtime
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crsn/crsn_screen/src/lib.rs

46 lines
1.2 KiB

#[macro_use]
extern crate log;
use crsn::asm::error::CrsnError;
use crsn::asm::instr::op::OpKind;
use crsn::asm::parse::arg_parser::TokenParser;
use crsn::module::{CrsnExtension, ParseRes};
use crsn::sexp::SourcePosition;
use crsn::asm::data::literal::Value;
use crate::exec::{OPT_AUTO_BLIT, OPT_FRAME_RATE, OPT_UPSCALE};
mod defs;
mod parse;
mod exec;
#[derive(Debug, Clone)]
pub struct ScreenOps;
impl ScreenOps {
pub fn new() -> Box<dyn CrsnExtension> {
Box::new(Self)
}
}
impl CrsnExtension for ScreenOps {
fn name(&self) -> &'static str {
"screen"
}
fn parse_op<'a>(&self, pos: &SourcePosition, keyword: &str, args: TokenParser<'a>) -> Result<ParseRes<'a, OpKind>, CrsnError> {
parse::parse(pos, keyword, args)
}
/// Get value of an extension-provided constant.
/// This constant may be an object handle, or a constant value used as argument in some other instruction.
fn get_constant_value<'a>(&self, name: &str) -> Option<Value>
{
match name {
"SCREEN_AUTO_BLIT" => Some(OPT_AUTO_BLIT),
"SCREEN_FPS" => Some(OPT_FRAME_RATE),
"SCREEN_UPSCALE" => Some(OPT_UPSCALE),
_ => None
}
}
}