From 6666744827856c07f315a6dfc2344b30f8832b81 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Gardou?= <jerome.gardou@reactos.org>
Date: Tue, 1 Oct 2013 23:08:50 +0000
Subject: [PATCH] [OPENGL32]  - Initialize the viewport when setting the
 context as current for the first time.

svn path=/trunk/; revision=60510
---
 reactos/dll/opengl/opengl32/swimpl.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/reactos/dll/opengl/opengl32/swimpl.c b/reactos/dll/opengl/opengl32/swimpl.c
index 195401836c8..3efa591a0d8 100644
--- a/reactos/dll/opengl/opengl32/swimpl.c
+++ b/reactos/dll/opengl/opengl32/swimpl.c
@@ -13,6 +13,7 @@
 #include <main/framebuffer.h>
 #include <main/renderbuffer.h>
 #include <main/shared.h>
+#include <main/viewport.h>
 #include <swrast/s_context.h>
 #include <swrast/s_renderbuffer.h>
 #include <swrast_setup/swrast_setup.h>
@@ -758,6 +759,15 @@ BOOL sw_SetContext(struct wgl_dc_data* dc_data, DHGLRC dhglrc)
         ERR("_mesa_make_current filaed!\n");
         return FALSE;
     }
+    
+    /* Set the viewport if this is the first time we initialize this context */
+    if(sw_ctx->mesa.Viewport.X == 0 && 
+       sw_ctx->mesa.Viewport.Y == 0 &&
+       sw_ctx->mesa.Viewport.Width == 0 &&
+       sw_ctx->mesa.Viewport.Height == 0)
+    {
+        _mesa_set_viewport(&sw_ctx->mesa, 0, 0, width, height);
+    }
 
     /* update the framebuffer size */
     _mesa_resize_framebuffer(&sw_ctx->mesa, fb->gl_buffer, width, height);