Initialize cell dimensions when create a Graphics instance.

This fixes a bug that crashes the terminal when a graphic is added before
resizing the window.

2 files changed, 11 insertions, 3 deletions

diff --git a/alacritty_terminal/src/graphics/mod.rs b/alacritty_terminal/src/graphics/mod.rs
index b6f58a11..4641a912 100644
--- a/alacritty_terminal/src/graphics/mod.rs
+++ b/alacritty_terminal/src/graphics/mod.rs
@@ -296,6 +296,14 @@ pub struct Graphics {
 }
 
 impl Graphics {
+    /// Create a new instance, and initialize it with the dimensions of the
+    /// window.
+    pub fn new<S: Dimensions>(size: &S) -> Self {
+        let mut graphics = Graphics::default();
+        graphics.resize(size);
+        graphics
+    }
+
     /// Generate a new graphic identifier.
     pub fn next_id(&mut self) -> GraphicId {
         self.last_id += 1;
@@ -333,7 +341,7 @@ impl Graphics {
     }
 
     /// Update cell dimensions.
-    pub fn resize<S: Dimensions>(&mut self, size: S) {
+    pub fn resize<S: Dimensions>(&mut self, size: &S) {
         self.cell_height = size.cell_height();
         self.cell_width = size.cell_width();
     }
diff --git a/alacritty_terminal/src/term/mod.rs b/alacritty_terminal/src/term/mod.rs
index 4fc4032b..b02e40f4 100644
--- a/alacritty_terminal/src/term/mod.rs
+++ b/alacritty_terminal/src/term/mod.rs
@@ -373,7 +373,7 @@ impl<T> Term<T> {
             title: None,
             title_stack: Vec::new(),
             selection: None,
-            graphics: Graphics::default(),
+            graphics: Graphics::new(dimensions),
             damage,
         }
     }
@@ -665,7 +665,7 @@ impl<T> Term<T> {
         self.damage.resize(num_cols, num_lines);
 
         // Update size information for graphics.
-        self.graphics.resize(size);
+        self.graphics.resize(&size);
     }
 
     /// Active terminal modes.