8 files changed, 38 insertions, 2 deletions
diff --git a/src/client.cpp b/src/client.cpp
index 8ddb5dcdd..f202f1982 100644
--- a/src/client.cpp
+++ b/src/client.cpp
@@ -364,6 +364,8 @@ void Client::gameInit()
 
     WindowManager::initTitle();
 
+    mainGraphics->postInit();
+
     theme = new Theme;
     Theme::selectSkin();
     touchManager.init();
diff --git a/src/defaults.cpp b/src/defaults.cpp
index dfef414fb..50d15c4df 100644
--- a/src/defaults.cpp
+++ b/src/defaults.cpp
@@ -460,7 +460,11 @@ DefaultsData* getPathsDefaults()
     AddDEF("sprites", "graphics/sprites/");
     AddDEF("spriteErrorFile", "error.xml");
     AddDEF("guiIcons", "graphics/guiicons/");
+    AddDEF("shaders", "graphics/shaders/");
+    AddDEF("help", "help/");
 
+    AddDEF("simpleVertexShader", "simple_vertex.glsl");
+    AddDEF("simpleFragmentShader", "simple_frag.glsl");
     AddDEF("particles", "graphics/particles/");
     AddDEF("portalEffectFile", "warparea.particle.xml");
     AddDEF("effectId", -1);
@@ -480,8 +484,6 @@ DefaultsData* getPathsDefaults()
     AddDEF("wallpapers", "graphics/images/");
     AddDEF("wallpaperFile", "login_wallpaper.png");
 
-    AddDEF("help", "help/");
-
     AddDEF("statusEffectsFile", "status-effects.xml");
     AddDEF("statusEffectsPatchFile", "status-effects_patch.xml");
     AddDEF("statusEffectsPatchDir", "status-effects.d");
diff --git a/src/graphicsmanager.cpp b/src/graphicsmanager.cpp
index 4fa4744a6..ed9768473 100644
--- a/src/graphicsmanager.cpp
+++ b/src/graphicsmanager.cpp
@@ -63,6 +63,8 @@
 #include "resources/surfaceimagehelper.h"
 #endif
 
+#include "render/shaders/shadersmanager.h"
+
 #include "utils/delete2.h"
 #include "utils/sdlhelper.h"
 #include "utils/stringutils.h"
diff --git a/src/render/graphics.h b/src/render/graphics.h
index 08bb7facf..a61c47437 100644
--- a/src/render/graphics.h
+++ b/src/render/graphics.h
@@ -450,6 +450,9 @@ class Graphics notfinal
         virtual void deleteArrays()
         { }
 
+        virtual void postInit()
+        { }
+
         int mWidth;
         int mHeight;
         int mActualWidth;
diff --git a/src/render/modernopenglgraphics.cpp b/src/render/modernopenglgraphics.cpp
index 2b771a2bb..566dec714 100644
--- a/src/render/modernopenglgraphics.cpp
+++ b/src/render/modernopenglgraphics.cpp
@@ -33,6 +33,9 @@
 
 #include "render/mgl.h"
 
+#include "render/shaders/shaderprogram.h"
+#include "render/shaders/shadersmanager.h"
+
 #include "resources/image.h"
 #include "resources/imagerect.h"
 #include "resources/openglimagehelper.h"
@@ -52,6 +55,7 @@ ModernOpenGLGraphics::ModernOpenGLGraphics() :
     mShortVertArray(nullptr),
     mFloatTexArrayCached(nullptr),
     mShortVertArrayCached(nullptr),
+    mSimpleProgram(nullptr),
     mAlphaCached(1.0F),
     mVpCached(0),
     mTexture(false),
@@ -97,6 +101,16 @@ void ModernOpenGLGraphics::initArrays(const int vertCount)
         mShortVertArrayCached = new GLshort[sz];
 }
 
+void ModernOpenGLGraphics::postInit()
+{
+    logger->log("Compiling shaders");
+    mSimpleProgram = shaders.getSimpleProgram();
+    if (mSimpleProgram)
+        logger->log("Shaders compilation done.");
+    else
+        logger->error("Shaders compilation error.");
+}
+
 void ModernOpenGLGraphics::deleteArrays()
 {
     deleteArraysInternal();
diff --git a/src/render/modernopenglgraphics.h b/src/render/modernopenglgraphics.h
index 09edcbd92..75165031f 100644
--- a/src/render/modernopenglgraphics.h
+++ b/src/render/modernopenglgraphics.h
@@ -46,6 +46,7 @@
 #include <set>
 
 class NormalOpenGLGraphicsVertexes;
+class ShaderProgram;
 
 class ModernOpenGLGraphics final : public Graphics
 {
@@ -56,6 +57,8 @@ class ModernOpenGLGraphics final : public Graphics
 
         ~ModernOpenGLGraphics();
 
+        void postInit() override final;
+
         #include "render/graphicsdef.hpp"
 
         #include "render/openglgraphicsdef.hpp"
@@ -67,6 +70,7 @@ class ModernOpenGLGraphics final : public Graphics
         GLshort *mShortVertArray;
         GLfloat *mFloatTexArrayCached;
         GLshort *mShortVertArrayCached;
+        ShaderProgram *mSimpleProgram;
         float mAlphaCached;
         int mVpCached;
         bool mTexture;
diff --git a/src/render/shaders/shadersmanager.cpp b/src/render/shaders/shadersmanager.cpp
index e6b5c7181..f9c305d79 100644
--- a/src/render/shaders/shadersmanager.cpp
+++ b/src/render/shaders/shadersmanager.cpp
@@ -22,6 +22,7 @@
 
 #ifdef USE_OPENGL
 
+#include "configuration.h"
 #include "logger.h"
 #include "settings.h"
 
@@ -111,4 +112,10 @@ ShaderProgram *ShadersManager::createProgram(const std::string &vertex,
     return nullptr;
 }
 
+ShaderProgram *ShadersManager::getSimpleProgram()
+{
+    const std::string dir = paths.getStringValue("shaders");
+    return createProgram(dir + paths.getStringValue("simpleVertexShader"),
+        dir + paths.getStringValue("simpleFragmentShader"));
+}
 #endif
diff --git a/src/render/shaders/shadersmanager.h b/src/render/shaders/shadersmanager.h
index ba7d26438..50e714aba 100644
--- a/src/render/shaders/shadersmanager.h
+++ b/src/render/shaders/shadersmanager.h
@@ -39,6 +39,8 @@ class ShadersManager final
         ShaderProgram *createProgram(const std::string &vertex,
                                      const std::string &fragment)
                                      A_WARN_UNUSED;
+
+        ShaderProgram *getSimpleProgram();
 };
 
 extern ShadersManager shaders;