Support building with desktop OpenGL managed via EGL

This mostly replaces lots of QT_OPENGL_ES defines with QT_NO_EGL
instead. It also switches off EGL auto-detection by default. This is
to make sure we default to using GLX on systems with both EGL and
desktop OpenGL. If -opengl es1|es2 or -openvg is specified, then
EGL auto-detection is switched back on (as a requirement. If
configure auto-detects OpenGL ES it also switches on EGL
auto-detection, but failue then just disables both EGL & OpenGL.

As a side effect, this patch also fixes building Qt when both EGL
and glx are avaliable, as they are in Mesa >= 7.8.0.

Reviewed-by: Trond
Task-number: QTBUG-9691

6 files changed, 19 insertions, 21 deletions

diff --git a/src/opengl/opengl.pro b/src/opengl/opengl.pro
index 9473343..15795d2 100644
--- a/src/opengl/opengl.pro
+++ b/src/opengl/opengl.pro
@@ -77,7 +77,7 @@ SOURCES	+= qgl.cpp \
 }
 
 x11 {
-    contains(QT_CONFIG, opengles1)|contains(QT_CONFIG, opengles2) {
+    contains(QT_CONFIG, egl) {
         SOURCES +=  qgl_x11egl.cpp \
                     qglpixelbuffer_egl.cpp \
                     qgl_egl.cpp \
diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
index 5595e02..4e1a63c 100644
--- a/src/opengl/qgl.cpp
+++ b/src/opengl/qgl.cpp
@@ -49,7 +49,7 @@
 #include "private/qpixmap_x11_p.h"
 #define INT32 dummy_INT32
 #define INT8 dummy_INT8
-#if !defined(QT_OPENGL_ES)
+#ifdef QT_NO_EGL
 # include <GL/glx.h>
 #endif
 #undef INT32
@@ -1582,7 +1582,7 @@ void QGLContextPrivate::init(QPaintDevice *dev, const QGLFormat &format)
 #  endif
     vi = 0;
 #endif
-#if defined(QT_OPENGL_ES)
+#ifndef QT_NO_EGL
     ownsEglContext = false;
     eglContext = 0;
     eglSurface = EGL_NO_SURFACE;
@@ -3950,7 +3950,7 @@ bool QGLWidget::event(QEvent *e)
         }
     }
 
-#if defined(QT_OPENGL_ES)
+#ifndef QT_NO_EGL
     // A re-parent is likely to destroy the X11 window and re-create it. It is important
     // that we free the EGL surface _before_ the winID changes - otherwise we can leak.
     if (e->type() == QEvent::ParentAboutToChange)
@@ -4909,7 +4909,7 @@ void QGLWidget::drawTexture(const QPointF &point, QMacCompatGLuint textureId, QM
 }
 #endif
 
-#if !defined(QT_OPENGL_ES_1)
+#ifndef QT_OPENGL_ES_1
 Q_GLOBAL_STATIC(QGL2PaintEngineEx, qt_gl_2_engine)
 #endif
 
diff --git a/src/opengl/qgl.h b/src/opengl/qgl.h
index 64f54a3..b1e2ede 100644
--- a/src/opengl/qgl.h
+++ b/src/opengl/qgl.h
@@ -376,7 +376,7 @@ protected:
 #if defined(Q_WS_WIN)
     virtual int choosePixelFormat(void* pfd, HDC pdc);
 #endif
-#if defined(Q_WS_X11) && !defined(QT_OPENGL_ES)
+#if defined(Q_WS_X11) && defined(QT_NO_EGL)
     virtual void* tryVisual(const QGLFormat& f, int bufDepth = 1);
     virtual void* chooseVisual();
 #endif
diff --git a/src/opengl/qgl_p.h b/src/opengl/qgl_p.h
index 1f28b08..ee580a6 100644
--- a/src/opengl/qgl_p.h
+++ b/src/opengl/qgl_p.h
@@ -64,7 +64,7 @@
 #include "qcache.h"
 #include "qglpaintdevice_p.h"
 
-#if defined(QT_OPENGL_ES) || defined(QT_OPENGL_ES_2)
+#ifndef QT_NO_EGL
 #include <QtGui/private/qegl_p.h>
 #endif
 
@@ -96,7 +96,7 @@ class QMacWindowChangeEvent;
 class QWSGLWindowSurface;
 #endif
 
-#if defined(QT_OPENGL_ES)
+#ifndef QT_NO_EGL
 class QEglContext;
 #endif
 
@@ -164,7 +164,7 @@ public:
 #ifdef Q_WS_QWS
                        , wsurf(0)
 #endif
-#if defined(Q_WS_X11) && defined(QT_OPENGL_ES)
+#if defined(Q_WS_X11) && !defined(QT_NO_EGL)
                        , eglSurfaceWindowId(0)
 #endif
     {
@@ -194,7 +194,7 @@ public:
     QGLContext *olcx;
 #elif defined(Q_WS_X11)
     QGLOverlayWidget *olw;
-#if defined(QT_OPENGL_ES)
+#ifndef QT_NO_EGL
     void recreateEglSurface(bool force);
     WId eglSurfaceWindowId;
 #endif
@@ -344,7 +344,7 @@ public:
     HBITMAP hbitmap;
     HDC hbitmap_hdc;
 #endif
-#if defined(QT_OPENGL_ES)
+#ifndef QT_NO_EGL
     bool ownsEglContext;
     QEglContext *eglContext;
     EGLSurface eglSurface;
diff --git a/src/opengl/qglpixelbuffer.cpp b/src/opengl/qglpixelbuffer.cpp
index eca9550..9a8b243 100644
--- a/src/opengl/qglpixelbuffer.cpp
+++ b/src/opengl/qglpixelbuffer.cpp
@@ -137,14 +137,14 @@ void QGLPixelBufferPrivate::common_init(const QSize &size, const QGLFormat &form
 #if defined(Q_WS_WIN) && !defined(QT_OPENGL_ES)
         qctx->d_func()->dc = dc;
         qctx->d_func()->rc = ctx;
-#elif (defined(Q_WS_X11) && !defined(QT_OPENGL_ES))
+#elif (defined(Q_WS_X11) && defined(QT_NO_EGL))
         qctx->d_func()->cx = ctx;
         qctx->d_func()->pbuf = (void *) pbuf;
         qctx->d_func()->vi = 0;
 #elif defined(Q_WS_MAC)
         qctx->d_func()->cx = ctx;
         qctx->d_func()->vi = 0;
-#elif defined(QT_OPENGL_ES)
+#elif !defined(QT_NO_EGL)
         qctx->d_func()->eglContext = ctx;
         qctx->d_func()->eglSurface = pbuf;
 #endif
@@ -254,7 +254,7 @@ bool QGLPixelBuffer::doneCurrent()
     \sa size()
 */
 
-#if (defined(Q_WS_X11) || defined(Q_WS_WIN)) && !defined(QT_OPENGL_ES)
+#if (defined(Q_WS_X11) || defined(Q_WS_WIN)) && defined(QT_NO_EGL)
 GLuint QGLPixelBuffer::generateDynamicTexture() const
 {
     Q_D(const QGLPixelBuffer);
diff --git a/src/opengl/qglpixelbuffer_p.h b/src/opengl/qglpixelbuffer_p.h
index c85dc5a..2a1f671 100644
--- a/src/opengl/qglpixelbuffer_p.h
+++ b/src/opengl/qglpixelbuffer_p.h
@@ -60,7 +60,7 @@ QT_BEGIN_INCLUDE_NAMESPACE
 #include <private/qgl_p.h>
 #include <private/qglpaintdevice_p.h>
 
-#if defined(Q_WS_X11) && !defined(QT_OPENGL_ES)
+#if defined(Q_WS_X11) && defined(QT_NO_EGL)
 #include <GL/glx.h>
 
 // The below is needed to for compilation on HPUX, due to broken GLX
@@ -127,10 +127,8 @@ struct GLXFBConfig {
 
 #elif defined(Q_WS_WIN)
 DECLARE_HANDLE(HPBUFFERARB);
-#elif defined(QT_OPENGL_ES_2)
-#include <EGL/egl.h>
-#elif defined(QT_OPENGL_ES)
-#include <GLES/egl.h>
+#elif !defined(QT_NO_EGL)
+#include <QtGui/private/qegl_p.h>
 #endif
 QT_END_INCLUDE_NAMESPACE
 
@@ -174,7 +172,7 @@ public:
     QPointer<QGLWidget> req_shareWidget;
     QSize req_size;
 
-#if defined(Q_WS_X11) && !defined(QT_OPENGL_ES)
+#if defined(Q_WS_X11) && defined(QT_NO_EGL)
     GLXPbuffer pbuf;
     GLXContext ctx;
 #elif defined(Q_WS_WIN)
@@ -195,7 +193,7 @@ public:
     AGLContext share_ctx;
 #  endif
 #endif
-#if defined(QT_OPENGL_ES)
+#ifndef QT_NO_EGL
     EGLSurface pbuf;
     QEglContext *ctx;
     int textureFormat;