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Bug 3290

Summary: showimage leaks renderer and doesn't call SDL_VideoQuit
Product: SDL_image Reporter: Juha Niemimäki <juha.niemimaki>
Component: miscAssignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2 CC: sylvain.becker
Version: 2.0.1   
Hardware: All   
OS: All   

Description Juha Niemimäki 2016-03-15 18:11:45 UTC 
I was testing SDL_image2 on AmigaOS 4 platform. Noticed a couple of issues with 'showimage' tool:

1) SDL_VideoInit seems to be called implicitly via window creation. SDL_Quit doesn't call SDL_VideoQuit so it doesn't close video device, windows etc. properly. Proposal: add SDL_Init(SDL_INIT_VIDEO) in the beginning for symmetrical video init/deinit.

2) Renderer is not destroyed at the end. As far as I know SDL2 doesn't automatically delete renderers. Proposal: add SDL_DestroyRenderer(renderer) at the end.
Comment 1 Sylvain 2017-09-11 19:48:22 UTC 
Small patch for this:

--- a/showimage.c	Sat Sep 09 18:57:05 2017 -0700
+++ b/showimage.c	Mon Sep 11 21:47:56 2017 +0200
@@ -76,6 +76,11 @@
         }
     }
 
+    if (SDL_Init(SDL_INIT_VIDEO) == -1) {
+        fprintf(stderr, "SDL_Init(SDL_INIT_VIDEO) failed: %s\n", SDL_GetError());
+        return(2);
+    }
+
     if (SDL_CreateWindowAndRenderer(0, 0, flags, &window, &renderer) < 0) {
         fprintf(stderr, "SDL_CreateWindowAndRenderer() failed: %s\n", SDL_GetError());
         return(2);
@@ -169,6 +174,10 @@
         SDL_DestroyTexture(texture);
     }
 
+
+    SDL_DestroyRenderer(renderer);
+    SDL_DestroyWindow(window);
+
     /* We're done! */
     SDL_Quit();
     return(0);
Comment 2 Sam Lantinga 2017-09-12 04:23:18 UTC 
Fixed, thanks!
https://hg.libsdl.org/SDL_image/rev/28967769bc2e