From ca57370d923cbda2f14380382d887ad5e003a040 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Samuel=20R=C3=B8dal?= <sroedal@trolltech.com>
Date: Mon, 15 Jun 2009 10:47:51 +0200
Subject: Re-enabled GL pixmap backend and window surface to work without GL2.

GL window surface and GL pixmap backend should work with old GL engine
as well, though not supported to the same degree.

Reviewed-by: Trond
---
 src/opengl/qgraphicssystem_gl.cpp |  1 +
 src/opengl/qpixmapdata_gl.cpp     |  3 ++-
 src/opengl/qwindowsurface_gl.cpp  | 12 ++++++++++++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/opengl/qgraphicssystem_gl.cpp b/src/opengl/qgraphicssystem_gl.cpp
index ce8ad7a..a75f3a5 100644
--- a/src/opengl/qgraphicssystem_gl.cpp
+++ b/src/opengl/qgraphicssystem_gl.cpp
@@ -44,6 +44,7 @@
 #include "private/qpixmap_raster_p.h"
 #include "private/qpixmapdata_gl_p.h"
 #include "private/qwindowsurface_gl_p.h"
+#include "private/qgl_p.h"
 #include <private/qwindowsurface_raster_p.h>
 
 QT_BEGIN_NAMESPACE
diff --git a/src/opengl/qpixmapdata_gl.cpp b/src/opengl/qpixmapdata_gl.cpp
index 48feb82..e641d2c 100644
--- a/src/opengl/qpixmapdata_gl.cpp
+++ b/src/opengl/qpixmapdata_gl.cpp
@@ -398,7 +398,8 @@ static TextureBuffer createTextureBuffer(const QSize &size, QGL2PaintEngineEx *e
 bool QGLPixmapData::useFramebufferObjects()
 {
     return QGLFramebufferObject::hasOpenGLFramebufferObjects()
-           && QGLFramebufferObject::hasOpenGLFramebufferBlit();
+           && QGLFramebufferObject::hasOpenGLFramebufferBlit()
+           && qt_gl_preferGL2Engine();
 }
 
 QPaintEngine* QGLPixmapData::paintEngine() const
diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp
index 01974a2..cdfaa3c 100644
--- a/src/opengl/qwindowsurface_gl.cpp
+++ b/src/opengl/qwindowsurface_gl.cpp
@@ -72,6 +72,10 @@
 
 #include <private/qpaintengineex_opengl2_p.h>
 
+#ifndef QT_OPENGL_ES_2
+#include <private/qpaintengine_opengl_p.h>
+#endif
+
 #ifndef GLX_ARB_multisample
 #define GLX_SAMPLE_BUFFERS_ARB  100000
 #define GLX_SAMPLES_ARB         100001
@@ -315,9 +319,17 @@ void QGLWindowSurface::hijackWindow(QWidget *widget)
 
 Q_GLOBAL_STATIC(QGL2PaintEngineEx, qt_gl_window_surface_2_engine)
 
+#if !defined (QT_OPENGL_ES_2)
+Q_GLOBAL_STATIC(QOpenGLPaintEngine, qt_gl_window_surface_engine)
+#endif
+
 /*! \reimp */
 QPaintEngine *QGLWindowSurface::paintEngine() const
 {
+#if !defined(QT_OPENGL_ES_2)
+    if (!qt_gl_preferGL2Engine())
+        return qt_gl_window_surface_engine();
+#endif
     return qt_gl_window_surface_2_engine();
 }
 
-- 
cgit v0.12