screen imrpvoements

crsn/src/asm/parse/arg_parser.rs

@@ -29,6 +29,10 @@ impl ArgParser {
         }
     }
 
+    pub fn have_more(&self) -> bool {
+        self.len() > 0
+    }
+
     /// Get remaining items count
     pub fn len(&self) -> usize {
         self.args.len()

crsn/src/lib.rs

@@ -7,4 +7,4 @@ pub mod asm;
 pub mod builtin;
 pub mod runtime;
 pub mod module;
-
+pub mod utils;

crsn/src/utils/mod.rs

@@ -0,0 +1,3 @@
+mod option_ext;
+
+pub use option_ext::UncheckedOptionExt;

crsn/src/utils/option_ext.rs

@@ -0,0 +1,18 @@
+/// This is copied from parking_lot
+///
+/// Copyright 2016 Amanieu d'Antras
+
+// Option::unchecked_unwrap
+pub trait UncheckedOptionExt<T> {
+    unsafe fn unchecked_unwrap(self) -> T;
+}
+
+impl<T> UncheckedOptionExt<T> for Option<T> {
+    #[inline]
+    unsafe fn unchecked_unwrap(self) -> T {
+        match self {
+            Some(x) => x,
+            None => core::hint::unreachable_unchecked(),
+        }
+    }
+}

crsn_screen/src/defs.rs

@@ -10,5 +10,12 @@ pub enum ScreenOp {
         x: Rd,
         y: Rd,
         color: Rd,
-    }
+    },
+    Blit {
+        force: Rd,
+    },
+    SetOpt {
+        opt: Rd,
+        val: Rd,
+    },
 }

crsn_screen/src/exec.rs

@@ -10,15 +10,45 @@ use crate::defs::ScreenOp;
 use minifb::{Window, WindowOptions, ScaleMode};
 use parking_lot::Mutex;
 use std::sync::Arc;
+use std::time::{Instant, Duration};
+use std::ops::Sub;
+use crsn::utils::UncheckedOptionExt;
+
+#[derive(Debug)]
+struct Opts {
+    auto_blit: bool,
+    frame_rate: Duration,
+}
 
-#[derive(Debug, Default)]
+#[derive(Debug)]
 struct Backend {
     width: usize,
     height: usize,
     buffer: Vec<u32>,
     window: Option<Window>,
+    last_render: Instant,
+    opts: Opts
 }
 
+impl Default for Backend {
+    fn default() -> Self {
+        Self {
+            width: 0,
+            height: 0,
+            buffer: vec![],
+            window: None,
+            last_render: Instant::now().sub(Duration::from_secs(1)),
+            opts: Opts {
+                auto_blit: true,
+                frame_rate: Duration::from_micros(16600),
+            }
+        }
+    }
+}
+
+const OPT_AUTO_BLIT : u64 = 1;
+const OPT_FRAME_RATE : u64 = 2;
+
 // Hack for Window
 unsafe impl std::marker::Send for Backend { }
 
@@ -31,12 +61,48 @@ impl OpTrait for ScreenOp {
                 let h = state.read(*height)?;
                 init(state, w, h)?;
             }
+            ScreenOp::SetOpt { opt, val } => {
+                let opt = state.read(*opt)?;
+                let val = state.read(*val)?;
+                let backend : &mut Backend = state.ext_mut();
+
+                match opt {
+                    OPT_AUTO_BLIT => {
+                        backend.opts.auto_blit = (val != 0);
+                        debug!("Set auto blit to {:?}", backend.opts.auto_blit);
+                    }
+                    OPT_FRAME_RATE => {
+                        backend.opts.frame_rate = Duration::from_micros(1_000_000 as u64 / val);
+                        debug!("Set frame rate to {:?}", backend.opts.frame_rate);
+                    }
+                    other => {
+                        warn!("Bad screen opt: {}", other);
+                        state.set_flag(Cond::Invalid, true);
+                    }
+                }
+            }
+            ScreenOp::Blit { force } => {
+                let force = state.read(*force)?;
+                let backend : &mut Backend = state.ext_mut();
+
+                if force != 0 {
+                    blit(backend)
+                } else {
+                    blit_maybe(backend)
+                }
+            }
             ScreenOp::SetPixel { x, y, color } => {
                 let x = state.read(*x)?;
                 let y = state.read(*y)?;
                 let color = state.read(*color)?;
 
                 let backend : &mut Backend = state.ext_mut();
+
+                if x >= backend.width as u64 || y >= backend.height as u64 {
+                    state.set_flag(Cond::Overflow, true);
+                    return Ok(eres);
+                }
+
                 match &mut backend.window {
                     Some(w) => {
                         let index = y * backend.width as u64 + x;
@@ -46,9 +112,9 @@ impl OpTrait for ScreenOp {
                         } else {
                             backend.buffer[index as usize] = color as u32;
 
-                            w
-                                .update_with_buffer(&backend.buffer, backend.width, backend.height)
-                                .expect("Update screen"); // TODO fault
+                            if backend.opts.auto_blit {
+                                blit_maybe(backend);
+                            }
                         }
                     }
                     None => {
@@ -70,7 +136,7 @@ fn init(state: &mut RunState, width: Value, height: Value) -> Result<(), Fault>
         height as usize,
         WindowOptions {
             resize: true,
-            scale_mode: ScaleMode::AspectRatioStretch,
+            scale_mode: ScaleMode::UpperLeft,
             ..WindowOptions::default()
         },
     ).expect("Unable to create window"); // TODO fault
@@ -87,13 +153,25 @@ fn init(state: &mut RunState, width: Value, height: Value) -> Result<(), Fault>
     backend.buffer = vec![0; (width * height) as usize];
 
     // window.limit_update_rate(Some(std::time::Duration::from_micros(16600)));
-    window.limit_update_rate(None);
-
-    window
-        .update_with_buffer(&backend.buffer, backend.width, backend.height)
-        .expect("Update screen"); // TODO fault
+    // window.limit_update_rate(None);
 
     backend.window = Some(window);
 
+    blit_maybe(backend);
+
     Ok(())
 }
+
+fn blit_maybe(backend: &mut Backend) {
+    if backend.last_render.elapsed() >= backend.opts.frame_rate {
+        blit(backend);
+    }
+}
+
+fn blit(backend: &mut Backend) {
+    backend.window.as_mut().unwrap()
+        .update_with_buffer(&backend.buffer, backend.width, backend.height)
+        .expect("Update screen"); // TODO fault
+
+    backend.last_render = Instant::now();
+}

crsn_screen/src/parse.rs

@@ -1,8 +1,8 @@
-
+use crsn::asm::data::Rd;
 use crsn::asm::error::CrsnError;
 use crsn::asm::instr::Op;
 use crsn::asm::parse::arg_parser::ArgParser;
-use crsn::module::{ParseOpRes};
+use crsn::module::ParseOpRes;
 
 use crate::defs::ScreenOp;
 
@@ -23,6 +23,23 @@ pub(crate) fn parse(keyword: &str, mut args: ArgParser) -> Result<ParseOpRes<Op>
             }
         }
 
+        "sc-opt" => {
+            ScreenOp::SetOpt {
+                opt: args.next_rd()?,
+                val: args.next_rd()?,
+            }
+        }
+
+        "sc-blit" => {
+            ScreenOp::Blit {
+                force: if args.have_more() {
+                    args.next_rd()?
+                } else {
+                    Rd::immediate(1)
+                },
+            }
+        }
+
         _other => {
             return Ok(ParseOpRes::Unknown(args));
         }

launcher/src/main.rs

@@ -78,6 +78,8 @@ fn main() {
     (
         (main
             (sc-init 640 480)
+            (sc-opt 1 0) ; auto blit
+            (sc-opt 2 60) ; frame rate
 
             (ld r0 39) ; x
             (ld r1 0) ; y
@@ -88,9 +90,10 @@ fn main() {
             (ld r5 0xffffff)
 
             (:loop)
-            (add r5 0x123456)
+            (add r5 0x010001)
             (and r5 0xffffff)
             (sc-px r0 r1 r5)
+            (sc-blit 0)
             (add r0 r2)
             (add r1 r3)
             (cmp r0 639 (eq? (ld r2 -1)))