From e9f2e337979dba05ba0c44977383226caae92c83 Mon Sep 17 00:00:00 2001
From: Simon Heath <icefoxen@gmail.com>
Date: Thu, 22 Mar 2018 15:42:04 -0400
Subject: [PATCH] Made gl_set_swap_interval() return Result, not bool

Resolves #755
---
 src/sdl2/video.rs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/sdl2/video.rs b/src/sdl2/video.rs
index ce6b93d6..cd314fb9 100644
--- a/src/sdl2/video.rs
+++ b/src/sdl2/video.rs
@@ -791,8 +791,13 @@ impl VideoSubsystem {
         }
     }
 
-    pub fn gl_set_swap_interval<S: Into<SwapInterval>>(&self, interval: S) -> bool {
-        unsafe { sys::SDL_GL_SetSwapInterval(interval.into() as c_int) == 0 }
+    pub fn gl_set_swap_interval<S: Into<SwapInterval>>(&self, interval: S) -> Result<(), String> {
+        let result = unsafe { sys::SDL_GL_SetSwapInterval(interval.into() as c_int) };
+        if result == 0{
+            Ok(())
+        } else {
+            Err(get_error())
+        }
     }
 
     pub fn gl_get_swap_interval(&self) -> SwapInterval {