New themes

src/state/project.rs

@@ -7,6 +7,7 @@ pub struct ProjectState {
     pub project: Project,
     pub file_path: Option<PathBuf>,
     dirty_patterns: [[bool; MAX_PATTERNS]; MAX_BANKS],
+    dirty_count: usize,
 }
 
 impl Default for ProjectState {
@@ -15,6 +16,7 @@ impl Default for ProjectState {
             project: Project::default(),
             file_path: None,
             dirty_patterns: [[false; MAX_PATTERNS]; MAX_BANKS],
+            dirty_count: 0,
         };
         state.mark_all_dirty();
         state
@@ -23,15 +25,22 @@ impl Default for ProjectState {
 
 impl ProjectState {
     pub fn mark_dirty(&mut self, bank: usize, pattern: usize) {
-        self.dirty_patterns[bank][pattern] = true;
+        if !self.dirty_patterns[bank][pattern] {
+            self.dirty_patterns[bank][pattern] = true;
+            self.dirty_count += 1;
+        }
     }
 
     pub fn mark_all_dirty(&mut self) {
         self.dirty_patterns = [[true; MAX_PATTERNS]; MAX_BANKS];
+        self.dirty_count = MAX_BANKS * MAX_PATTERNS;
     }
 
     pub fn take_dirty(&mut self) -> Vec<(usize, usize)> {
-        let mut result = Vec::new();
+        if self.dirty_count == 0 {
+            return Vec::new();
+        }
+        let mut result = Vec::with_capacity(self.dirty_count);
         for (bank, patterns) in self.dirty_patterns.iter_mut().enumerate() {
             for (pattern, dirty) in patterns.iter_mut().enumerate() {
                 if *dirty {
@@ -40,6 +49,7 @@ impl ProjectState {
                 }
             }
         }
+        self.dirty_count = 0;
         result
     }
 }