add flood fill mode with custom cursor

src/canvas_modes.h

@@ -19,6 +19,7 @@ enum class kCanvasMode
     Fill,
     MaskFree,
     MaskLine,
+    FloodFill,
     COUNT,
 };
 
@@ -37,6 +38,8 @@ class CanvasMode
 {
 public:
     static class NodeCanvas* node;
+    bool hide_curor = false;
+    bool m_draw_tip = false;
     //static Canvas* canvas;
     virtual void on_MouseEvent(MouseEvent* me, glm::vec2& loc) {}
     virtual void on_KeyEvent(KeyEvent* ke) {}
@@ -78,7 +81,7 @@ class CanvasModePen : public CanvasMode
     // resizing the tip
     bool m_resizing = false;
 public:
-    CanvasModePen() = default;
+    CanvasModePen() { hide_curor = true; }
     
     virtual void on_GestureEvent(GestureEvent* ge) override;
     virtual void on_MouseEvent(MouseEvent* me, glm::vec2& loc) override;
@@ -87,7 +90,6 @@ public:
     virtual void leave(kCanvasMode next) override;
     bool m_picking = false;
     glm::vec2 m_cur_pos;
-    bool m_draw_tip = false;
     bool m_draw_outline = true;
 };
 
@@ -99,7 +101,6 @@ class CanvasModeLine : public CanvasMode
     glm::vec2 m_drag_pos;
 public:
     glm::vec2 m_cur_pos;
-    bool m_draw_tip = false;
     virtual void on_MouseEvent(MouseEvent* me, glm::vec2& loc) override;
     virtual void on_Draw(const glm::mat4& ortho, const glm::mat4& proj, const glm::mat4& camera) override;
     virtual void init() override;
@@ -107,6 +108,19 @@ public:
     virtual void leave(kCanvasMode next) override;
 };
 
+class CanvasModeFloodFill : public CanvasMode
+{
+    const std::string m_cursor_path = "data/cursor/bucket-fill.png";
+    const uint16_t m_cursor_id = const_hash(m_cursor_path.c_str());
+public:
+    CanvasModeFloodFill() { hide_curor = true; }
+    glm::vec2 m_cur_pos;
+    virtual void init() override;
+    virtual void on_MouseEvent(MouseEvent* me, glm::vec2& loc) override;
+    virtual void on_Draw(const glm::mat4& ortho, const glm::mat4& proj, const glm::mat4& camera) override;
+};
+
+
 struct ray_t { glm::vec3 o, d; };
 class CanvasModeGrid : public CanvasMode
 {