From 57799a188bf5afef180dd70981f9882c7b695ea7 Mon Sep 17 00:00:00 2001
From: Ryan Kennedy <rkennedy9064@gmail.com>
Date: Sun, 29 Mar 2020 17:27:46 -0500
Subject: [PATCH] Feature alloc for graphics

---
 Cargo.toml         | 7 +++++++
 src/lib.rs         | 1 +
 src/writers/mod.rs | 4 ++++
 3 files changed, 12 insertions(+)

diff --git a/Cargo.toml b/Cargo.toml
index 5d2e8ba..aca89c8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,3 +28,10 @@ x86_64 = "0.9.6"
 [dependencies.num-traits]
 version = "0.2.11"
 default-features = false
+
+[features]
+default = []
+alloc = []
+
+[package.metadata.docs.rs]
+features = ["alloc"]
diff --git a/src/lib.rs b/src/lib.rs
index 5c486e8..c90ef6a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,6 +7,7 @@
 #![no_std]
 #![warn(missing_docs)]
 
+#[cfg(feature = "alloc")]
 extern crate alloc;
 
 pub mod colors;
diff --git a/src/writers/mod.rs b/src/writers/mod.rs
index 92c55f4..7ecc65d 100644
--- a/src/writers/mod.rs
+++ b/src/writers/mod.rs
@@ -1,5 +1,7 @@
 //! Writers for common vga modes.
+#[cfg(feature = "alloc")]
 mod graphics_320x200x256;
+#[cfg(feature = "alloc")]
 mod graphics_640x480x16;
 mod text_40x25;
 mod text_40x50;
@@ -11,7 +13,9 @@ use super::{
     vga::VGA,
 };
 
+#[cfg(feature = "alloc")]
 pub use graphics_320x200x256::Graphics320x200x256;
+#[cfg(feature = "alloc")]
 pub use graphics_640x480x16::Graphics640x480x16;
 pub use text_40x25::Text40x25;
 pub use text_40x50::Text40x50;