1 files changed, 12 insertions, 1 deletions
diff --git a/main.h b/main.h
index da099cc..8a6c7ca 100644
--- a/main.h
+++ b/main.h
@@ -252,6 +252,8 @@ struct layer_bitmap_info {
     void *AVInfo;        // Internal data containing current frame info
 };
 
+// NOTE(fox): I use the term "comp" (composition) to mean the canvas that is
+// being rendered to, since it's what I'm used to from AE.
 struct comp_buffer {
     uint16 Width;
     uint16 Height;
@@ -418,7 +420,12 @@ enum selection_type
 
 enum tool {
     tool_default,
-    tool_pen
+    tool_pen,
+    tool_count
+};
+
+struct pen_state {
+    bool32 IsActive;
 };
 
 struct project_state
@@ -428,6 +435,7 @@ struct project_state
     bool32 DebugDisableCache = 1;
 
     tool Tool = tool_default;
+    pen_state Pen = {};
 
     uint16 LayersToRender[MAX_LAYERS];
     uint16 NumberOfLayersToRender;
@@ -470,6 +478,9 @@ struct ui
     real32 TimelineSplit = 600;
     real32 TimelineZoom;
 
+    // Note that I don't use "zoom" to mean the scale in relation to the
+    // original (i.e. default = 1.0f); it's the literal screen size in pixels
+    // of the composition in the UI.
     ImVec2 CompZoom;
     ImVec2 CompPos;