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Bug 771

Summary: Patch to ensure that a GL window gets a GL renderer
Product: SDL Reporter: Mason Wheeler <masonwheeler>
Component: videoAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: 2.0.0   
Hardware: x86   
OS: Windows Vista   

Description Mason Wheeler 2009-07-19 22:34:35 UTC 
Due to the way SDL_CreateRenderer works, it's quite possible for a window created with the OpenGL flag to end up with a non-OpenGL renderer.  This patch corrects that.

===================================================================
--- C:/Users/Mason/Documents/SDL-1.3/SDL-1.3.0-4423/src/video/SDL_video.c	(revision 4624)
+++ C:/Users/Mason/Documents/SDL-1.3/SDL-1.3.0-4423/src/video/SDL_video.c	(working copy)
@@ -1473,8 +1473,11 @@
         return -1;
     }
     if (index < 0) {
-        const char *override = SDL_getenv("SDL_VIDEO_RENDERER");
+        char *override = SDL_getenv("SDL_VIDEO_RENDERER");
         int n = SDL_GetNumRenderDrivers();
+        if ((!override) && (window->flags & SDL_WINDOW_OPENGL)){
+            override = "opengl";
+        }
         for (index = 0; index < n; ++index) {
             SDL_RenderDriver *driver =
                 &SDL_CurrentDisplay.render_drivers[index];
Comment 1 Mason Wheeler 2009-11-24 03:29:31 UTC 
(In reply to comment #0)
Updated the patch code to work with newer revisions:

--- \src\video\SDL_video.c	2009-11-24 03:22:58.000000000 -0800
+++ \src\video\SDL_video.c	2009-11-24 03:20:38.000000000 -0800
@@ -1487,27 +1487,28 @@
     }
 
     /* Free any existing renderer */
     SDL_DestroyRenderer(windowID);
 
     if (index < 0) {
-        const char *override = SDL_getenv("SDL_VIDEO_RENDERER");
-        if (override) {
-            int i, n = SDL_GetNumRenderDrivers();
+        char *override = SDL_getenv("SDL_VIDEO_RENDERER");
+        int n = SDL_GetNumRenderDrivers();
+		if ((!override) && (window->flags & SDL_WINDOW_OPENGL)){
+			override = "opengl";
+		}
+		if (override) {
+            int i;
             for (i = 0; i < n; ++i) {
                 SDL_RenderDriver *driver =
                     &SDL_CurrentDisplay.render_drivers[i];
                 if (SDL_strcasecmp(override, driver->info.name) == 0) {
                     index = i;
                     break;
                 }
             }
         }
-    }
-    if (index < 0) {
-        int n = SDL_GetNumRenderDrivers();
         for (index = 0; index < n; ++index) {
             SDL_RenderDriver *driver =
                 &SDL_CurrentDisplay.render_drivers[index];
 
             if ((driver->info.flags & flags) == flags) {
                 /* Create a new renderer instance */
Comment 2 Sam Lantinga 2009-11-24 08:43:47 UTC 
I cleaned up the code a bit and committed it.  Can you make sure it still solves your bug?

Thanks!