From de4936399e8e30e168cf119452311f227cba2200 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Anselme=20FRAN=C3=87OIS?= <anselme@localhost.localdomain>
Date: Sat, 17 Oct 2015 21:04:38 +0200
Subject: [PATCH] added a test for compatibility

---
 sparrowrenderer.cpp | 23 ++++++++++++++---------
 sparrowrenderer.h   |  2 +-
 2 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/sparrowrenderer.cpp b/sparrowrenderer.cpp
index b559b79..323a86c 100644
--- a/sparrowrenderer.cpp
+++ b/sparrowrenderer.cpp
@@ -9,24 +9,29 @@
 
 bool SparrowRenderer::modernOpenglAvailable = false;
 
-void SparrowRenderer::initGL(int width, int height)
+void SparrowRenderer::initGL(int width, int height, bool forceCrappy)
 {
     glewExperimental = GL_TRUE;
     GLenum err = glewInit();
     if (GLEW_OK != err)
         fprintf(stderr, "Warning: glewInit failed!\n");
-    if (!GLEW_ARB_vertex_program   ||
-        !GLEW_ARB_fragment_program ||
-        !GLEW_ARB_texture_float    ||
-        !GLEW_ARB_draw_buffers     ||
-        !GLEW_ARB_framebuffer_object ||
-        !glewIsSupported("GL_VERSION_3_3"))
+    if (!forceCrappy &&
+        GLEW_ARB_vertex_program   &&
+        GLEW_ARB_fragment_program &&
+        GLEW_ARB_texture_float    &&
+        GLEW_ARB_draw_buffers     &&
+        GLEW_ARB_framebuffer_object &&
+        glewIsSupported("GL_VERSION_3_3") &&
+        GLEW_VERSION_3_3)
+    {
+        modernOpenglAvailable = true;
+        printf("Modern OpenGL available.\n");
+    }
+    else
     {
         modernOpenglAvailable = false;
         fprintf(stderr, "Warning: modern OpenGL not supported!\nEnabling fallback crappy rendering mode\n");
     }
-    else
-        modernOpenglAvailable = true;
 
     std::cout << "OpenGL version " << glGetString(GL_VERSION) << std::endl;
     std::cout << "GLSL version " << glGetString(GL_SHADING_LANGUAGE_VERSION) << std::endl;
diff --git a/sparrowrenderer.h b/sparrowrenderer.h
index a60c967..53f6ca4 100644
--- a/sparrowrenderer.h
+++ b/sparrowrenderer.h
@@ -11,7 +11,7 @@ class SparrowRenderer
 {
 public:
     // main methods
-    void initGL(int width, int height);
+    void initGL(int width, int height, bool forceCrappy = false);
     void destroyGL();
 	void resizeGL(int width, int height);
 	void renderGL();