From dd9b6fe61373e0f1ff0015a2d6b01360897fa8fc Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Thu, 28 Aug 2014 22:13:17 +0000
Subject: Fix compilation on Windows.

---
 pugl/pugl_win.cpp | 32 ++++++++++++++++++++++++--------
 wscript           | 10 +++-------
 2 files changed, 27 insertions(+), 15 deletions(-)

diff --git a/pugl/pugl_win.cpp b/pugl/pugl_win.cpp
index 9dfa70c..16c6b0b 100644
--- a/pugl/pugl_win.cpp
+++ b/pugl/pugl_win.cpp
@@ -71,6 +71,27 @@ puglInitInternals()
 	return (PuglInternals*)calloc(1, sizeof(PuglInternals));
 }
 
+void
+puglEnterContext(PuglView* view)
+{
+#ifdef PUGL_HAVE_GL
+	if (view->ctx_type == PUGL_GL) {
+		wglMakeCurrent(view->impl->hdc, view->impl->hglrc);
+	}
+#endif
+}
+
+void
+puglLeaveContext(PuglView* view, bool flush)
+{
+#ifdef PUGL_HAVE_GL
+	if (view->ctx_type == PUGL_GL && flush) {
+		glFlush();
+		SwapBuffers(view->impl->hdc);
+	}
+#endif
+}
+
 int
 puglCreateWindow(PuglView* view, const char* title)
 {
@@ -178,12 +199,10 @@ puglDestroy(PuglView* view)
 static void
 puglReshape(PuglView* view, int width, int height)
 {
-	wglMakeCurrent(view->impl->hdc, view->impl->hglrc);
+	puglEnterContext(view);
 
 	if (view->reshapeFunc) {
 		view->reshapeFunc(view, width, height);
-	} else {
-		puglDefaultReshape(view, width, height);
 	}
 
 	view->width  = width;
@@ -193,16 +212,13 @@ puglReshape(PuglView* view, int width, int height)
 static void
 puglDisplay(PuglView* view)
 {
-	wglMakeCurrent(view->impl->hdc, view->impl->hglrc);
-	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-	glLoadIdentity();
+	puglEnterContext(view);
 
 	if (view->displayFunc) {
 		view->displayFunc(view);
 	}
 
-	glFlush();
-	SwapBuffers(view->impl->hdc);
+	puglLeaveContext(view, true);
 	view->redisplay = false;
 }
 
diff --git a/wscript b/wscript
index cebf807..fb4c90b 100644
--- a/wscript
+++ b/wscript
@@ -54,13 +54,9 @@ def configure(conf):
     autowaf.display_header('Pugl Configuration')
 
     if not Options.options.no_gl:
-        conf.check(function_name = 'glLoadIdentity',
-                   header_name   = 'GL/gl.h',
-                   define_name   = 'HAVE_GL',
-                   lib           = ['GL'],
-                   mandatory     = False)
-        if conf.is_defined('HAVE_GL'):
-            autowaf.define(conf, 'PUGL_HAVE_GL', 1)
+        # TODO: Portable check for OpenGL
+        conf.define('HAVE_GL', 1)
+        autowaf.define(conf, 'PUGL_HAVE_GL', 1)
 
     if not Options.options.no_cairo:
         autowaf.check_pkg(conf, 'cairo',
-- 
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