From f81bc3c95a0ee388fe91f1e97cb2efd0cc186840 Mon Sep 17 00:00:00 2001
From: Edhebi <lmasson@edhebi.info>
Date: Sat, 8 Jun 2019 17:21:01 +0200
Subject: [PATCH] added conversion from PixelFormatEnum to PixelFormat

---
 src/sdl2/pixels.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/sdl2/pixels.rs b/src/sdl2/pixels.rs
index cc72869f..be1c3b34 100644
--- a/src/sdl2/pixels.rs
+++ b/src/sdl2/pixels.rs
@@ -5,6 +5,7 @@ use self::rand::distributions::{Distribution, Standard};
 use libc::uint32_t;
 use num::FromPrimitive;
 use std::mem::transmute;
+use std::convert::TryFrom;
 use crate::sys;
 
 use crate::get_error;
@@ -460,6 +461,21 @@ impl FromPrimitive for PixelFormatEnum {
     fn from_u64(n: u64) -> Option<PixelFormatEnum> { FromPrimitive::from_i64(n as i64) }
 }
 
+impl TryFrom<PixelFormatEnum> for PixelFormat {
+    type Error = String;
+
+    fn try_from(pfe: PixelFormatEnum) -> Result<Self, Self::Error> {
+        unsafe {
+            let pf_ptr = sys::SDL_AllocFormat(pfe as u32);
+            if pf_ptr.is_null() {
+                Err(get_error())
+            } else {
+                Ok(PixelFormat::from_ll(pf_ptr))
+            }
+        }
+    }
+}
+
 
 // Just test a round-trip conversion from PixelFormat to
 // PixelFormatEnum and back.