Convert pen strokes to texture

penTool.go

@@ -5,22 +5,41 @@ import (
 )
 
 type penTool struct {
-	Color  raylib.Color
 	Size   float32
+	Color  raylib.Color
 	Points []raylib.Vector2
 }
 
-func (p *penTool) Draw(offset raylib.Vector2) {
+func (p *penTool) Render() raylib.Texture2D {
+	offset := raylib.Vector2Scale(canvas.Offset, -1)
+	texture := raylib.LoadRenderTexture(int32(canvas.Size.X), int32(canvas.Size.Y))
+
+	raylib.BeginTextureMode(texture)
+	raylib.ClearBackground(raylib.Fade(raylib.Black, 0))
 	for i := 0; i < len(p.Points)-1; i++ {
 		startPoint := raylib.Vector2Add(p.Points[i], offset)
 		endPoint := raylib.Vector2Add(p.Points[i+1], offset)
-
 		raylib.DrawLineEx(startPoint, endPoint, p.Size, p.Color)
 		raylib.DrawCircle(int32(startPoint.X), int32(startPoint.Y), p.Size/2, p.Color)
 	}
-	// Add a circle at the end of the stroke
 	if len(p.Points) > 0 {
 		endPoint := raylib.Vector2Add(p.Points[len(p.Points)-1], offset)
 		raylib.DrawCircle(int32(endPoint.X), int32(endPoint.Y), p.Size/2, p.Color)
 	}
+	raylib.EndTextureMode()
+
+	return texture.Texture
+}
+
+func (p *penTool) Draw() {
+	for i := 0; i < len(p.Points)-1; i++ {
+		startPoint := p.Points[i]
+		endPoint := p.Points[i+1]
+		raylib.DrawLineEx(startPoint, endPoint, p.Size, p.Color)
+		raylib.DrawCircle(int32(startPoint.X), int32(startPoint.Y), p.Size/2, p.Color)
+	}
+	if len(p.Points) > 0 {
+		endPoint := p.Points[len(p.Points)-1]
+		raylib.DrawCircle(int32(endPoint.X), int32(endPoint.Y), p.Size/2, p.Color)
+	}
 }