Retrograded to OpenGL 3.0 functions

src/render/opengl/OpenGLRenderer.cpp

@@ -1,6 +1,6 @@
 #include "OpenGLRenderer.h"
 
-#include <QOpenGLFunctions_3_2_Core>
+#include OPENGL_FUNCTIONS_INCLUDE
 #include "CameraDefinition.h"
 #include "OpenGLSharedState.h"
 #include "OpenGLSkybox.h"
@@ -9,7 +9,9 @@
 OpenGLRenderer::OpenGLRenderer(Scenery* scenery):
     SoftwareRenderer(scenery)
 {
-    functions = new QOpenGLFunctions_3_2_Core();
+    ready = false;
+
+    functions = new OpenGLFunctions();
     shared_state = new OpenGLSharedState();
 
     skybox = new OpenGLSkybox(this);
@@ -27,9 +29,10 @@ OpenGLRenderer::~OpenGLRenderer()
 
 void OpenGLRenderer::initialize()
 {
-    // TODO Check return value
+    ready = functions->initializeOpenGLFunctions();
-    functions->initializeOpenGLFunctions();
 
+    if (ready)
+    {
         functions->glClearColor(0.0, 0.0, 0.0, 0.0);
 
         functions->glDisable(GL_LIGHTING);
@@ -57,20 +60,27 @@ void OpenGLRenderer::initialize()
 
         water->initialize();
         water->updateScenery();
+    }
 }
 
 void OpenGLRenderer::resize(int width, int height)
 {
+    if (ready)
+    {
         functions->glViewport(0, 0, width, height);
+    }
 }
 
 void OpenGLRenderer::paint()
 {
+    if (ready)
+    {
         functions->glClearColor(0.0, 0.0, 0.0, 0.0);
         functions->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         skybox->render();
         water->render();
+    }
 }
 
 void OpenGLRenderer::cameraChangeEvent(CameraDefinition *camera)

src/render/opengl/OpenGLRenderer.h

@@ -5,8 +5,6 @@
 
 #include "SoftwareRenderer.h"
 
-class QOpenGLFunctions_3_2_Core;
-
 namespace paysages {
 namespace opengl {
 
@@ -25,14 +23,16 @@ public:
 
     void cameraChangeEvent(CameraDefinition* camera);
 
-    inline QOpenGLFunctions_3_2_Core* getOpenGlFunctions() const {return functions;}
+    inline OpenGLFunctions* getOpenGlFunctions() const {return functions;}
     inline OpenGLSharedState* getSharedState() const {return shared_state;}
 
     virtual double getPrecision(const Vector3 &location) override;
     virtual Color applyMediumTraversal(Vector3 location, Color color) override;
 
 private:
-    QOpenGLFunctions_3_2_Core* functions;
+    bool ready;
+
+    OpenGLFunctions* functions;
     OpenGLSharedState* shared_state;
 
     OpenGLSkybox* skybox;

src/render/opengl/OpenGLShaderProgram.cpp

@@ -1,7 +1,7 @@
 #include "OpenGLShaderProgram.h"
 
+#include OPENGL_FUNCTIONS_INCLUDE
 #include <QOpenGLShaderProgram>
-#include <QOpenGLFunctions_3_2_Core>
 #include <QDir>
 #include "OpenGLRenderer.h"
 #include "OpenGLSharedState.h"

src/render/opengl/OpenGLShaderProgram.h

@@ -6,7 +6,6 @@
 #include <QString>
 
 class QOpenGLShaderProgram;
-class QOpenGLFunctions_3_2_Core;
 
 namespace paysages {
 namespace opengl {
@@ -39,7 +38,7 @@ private:
 
     QString name;
     QOpenGLShaderProgram* program;
-    QOpenGLFunctions_3_2_Core* functions;
+    OpenGLFunctions* functions;
 
     std::string source_vertex;
     std::string source_fragment;

src/render/opengl/OpenGLVariable.cpp

@@ -1,8 +1,8 @@
 #include "OpenGLVariable.h"
 
-#include <cassert>
+#include OPENGL_FUNCTIONS_INCLUDE
 #include <QOpenGLShaderProgram>
-#include <QOpenGLFunctions_3_2_Core>
+#include <cassert>
 #include "OpenGLRenderer.h"
 #include "OpenGLShaderProgram.h"
 #include "Vector3.h"
@@ -22,7 +22,7 @@ OpenGLVariable::OpenGLVariable(const std::string &name):
 void OpenGLVariable::apply(OpenGLShaderProgram *program, int &texture_unit)
 {
     QOpenGLShaderProgram* pr = program->getProgram();
-    QOpenGLFunctions_3_2_Core* functions = program->getRenderer()->getOpenGlFunctions();
+    OpenGLFunctions* functions = program->getRenderer()->getOpenGlFunctions();
 
     if (texture_toupload)
     {
@@ -133,7 +133,7 @@ void OpenGLVariable::set(const Color &color)
 
 void OpenGLVariable::uploadTexture(OpenGLRenderer* renderer)
 {
-    QOpenGLFunctions_3_2_Core* functions = renderer->getOpenGlFunctions();
+    OpenGLFunctions* functions = renderer->getOpenGlFunctions();
 
     assert(type == TYPE_TEXTURE_2D or type == TYPE_TEXTURE_3D or type == TYPE_TEXTURE_4D);
 

src/render/opengl/opengl_global.h

@@ -25,4 +25,9 @@ namespace opengl {
 }
 using namespace paysages::opengl;
 
+//#define OpenGLFunctions QOpenGLFunctions_3_2_Core
+#define OpenGLFunctions QOpenGLFunctions_3_0
+#define OPENGL_FUNCTIONS_INCLUDE <OpenGLFunctions>
+class OpenGLFunctions;
+
 #endif // OPENGL_GLOBAL_H