Store current screen size

When UBO support is lacking.

src/graphics/irr_driver.hpp

@@ -221,6 +221,7 @@ private:
     core::vector3df    rh_extend;
     core::matrix4      rh_matrix;
     core::matrix4      rsm_matrix;
+    core::vector2df    m_current_screen_size;
 
     /** Additional details to be shown in case that a texture is not found.
      *  This is used to specify details like: "while loading kart '...'" */
@@ -696,6 +697,7 @@ public:
     const core::matrix4 & getPreviousPVMatrix() { return m_previousProjViewMatrix; }
     const core::matrix4 &getProjViewMatrix() const { return m_ProjViewMatrix; }
     const core::matrix4 &getInvProjViewMatrix() const { return m_InvProjViewMatrix; }
+    const core::vector2df &getCurrentScreenSize() const { return m_current_screen_size; }
 #ifdef DEBUG
     /** Removes debug meshes. */
     void clearDebugMesh() { m_debug_meshes.clear(); }

src/graphics/render.cpp

@@ -563,6 +563,8 @@ void IrrDriver::computeCameraMatrix(scene::ICameraSceneNode * const camnode, siz
     irr_driver->setViewMatrix(irr_driver->getVideoDriver()->getTransform(video::ETS_VIEW));
     irr_driver->genProjViewMatrix();
 
+    m_current_screen_size = core::vector2df(float(width), float(height));
+
     const float oldfar = camnode->getFarValue();
     const float oldnear = camnode->getNearValue();
     float FarValues[] =

src/graphics/shaders.cpp

@@ -457,7 +457,7 @@ void bypassUBO(GLuint Program)
     GLint IPM = glGetUniformLocation(Program, "InverseProjectionMatrix");
     glUniformMatrix4fv(IPM, 1, GL_FALSE, irr_driver->getInvProjMatrix().pointer());
     GLint Screen = glGetUniformLocation(Program, "screen");
-    glUniform2f(Screen, UserConfigParams::m_width, UserConfigParams::m_height);
+    glUniform2f(Screen, irr_driver->getCurrentScreenSize().X, irr_driver->getCurrentScreenSize().Y);
 }
 
 namespace UtilShader