From feebb78f7557075e1750ff86887a040367a6ab77 Mon Sep 17 00:00:00 2001
From: Themaister <maister@archlinux.us>
Date: Sun, 23 Jun 2013 23:18:05 +0200
Subject: [PATCH] Support cached contexts on Win32.

Only tested on Wine, but works.
---
 gfx/context/wgl_ctx.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/gfx/context/wgl_ctx.c b/gfx/context/wgl_ctx.c
index 912a50ff71..52f3be9e20 100644
--- a/gfx/context/wgl_ctx.c
+++ b/gfx/context/wgl_ctx.c
@@ -83,7 +83,14 @@ static void create_gl_context(HWND hwnd)
    g_hdc = GetDC(hwnd);
    setup_pixel_format(g_hdc);
 
-   g_hrc = wglCreateContext(g_hdc);
+   if (!g_hrc)
+      g_hrc = wglCreateContext(g_hdc);
+   else
+   {
+      RARCH_LOG("[WGL]: Using cached GL context.\n");
+      driver.video_cache_context_ack = true;
+   }
+
    if (g_hrc)
    {
       if (wglMakeCurrent(g_hdc, g_hrc))
@@ -484,8 +491,12 @@ static void gfx_ctx_destroy(void)
    if (g_hrc)
    {
       wglMakeCurrent(NULL, NULL);
-      wglDeleteContext(g_hrc);
-      g_hrc = NULL;
+
+      if (!driver.video_cache_context)
+      {
+         wglDeleteContext(g_hrc);
+         g_hrc = NULL;
+      }
    }
 
    if (g_hwnd && g_hdc)
@@ -514,6 +525,7 @@ static void gfx_ctx_destroy(void)
 
    g_inited = false;
    g_major = g_minor = 0;
+   p_swap_interval = NULL;
 }
 
 static void gfx_ctx_input_driver(const input_driver_t **input, void **input_data)