Fix #3418

src/graphics/2dutils.cpp

@@ -700,5 +700,14 @@ void GL32_draw2DRectangle(video::SColor color, const core::rect<s32>& position,
     glGetError();
 }   // GL32_draw2DRectangle
 
+void preloadShaders()
+{
+    Primitive2DList::getInstance();
+    UniformColoredTextureRectShader::getInstance();
+    TextureRectShader::getInstance();
+    ColoredRectShader::getInstance();
+    ColoredTextureRectShader::getInstance();
+}   // preloadShaders
+
 #endif   // !SERVER_ONLY
 

src/graphics/2dutils.hpp

@@ -28,6 +28,8 @@
 #include <SColor.h>
 #include <SVertexIndex.h>
 
+void preloadShaders();
+
 void draw2DImageFromRTT(GLuint texture, size_t texture_w, size_t texture_h,
                         const irr::core::rect<irr::s32>& destRect,
                         const irr::core::rect<irr::s32>& sourceRect,

src/graphics/cpu_particle_manager.cpp

@@ -134,6 +134,25 @@ CPUParticleManager::GLParticle::GLParticle(bool flips)
     glBindVertexArray(0);
 }   // GLParticle
 
+// ----------------------------------------------------------------------------
+CPUParticleManager::CPUParticleManager()
+{
+    const float vertices[] =
+    {
+        -0.5f, 0.5f, 0.0f, 0.0f,
+        0.5f, 0.5f, 1.0f, 0.0f,
+        -0.5f, -0.5f, 0.0f, 1.0f,
+        0.5f, -0.5f, 1.0f, 1.0f,
+    };
+    glGenBuffers(1, &m_particle_quad);
+    glBindBuffer(GL_ARRAY_BUFFER, m_particle_quad);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+    glBindBuffer(GL_ARRAY_BUFFER, 0);
+    // For preloading shaders
+    ParticleRenderer::getInstance();
+    AlphaTestParticleRenderer::getInstance();
+}   // CPUParticleManager
+
 // ----------------------------------------------------------------------------
 void CPUParticleManager::addBillboardNode(scene::IBillboardSceneNode* node)
 {

src/graphics/cpu_particle_manager.hpp

@@ -116,21 +116,7 @@ private:
 
 public:
     // ------------------------------------------------------------------------
-    CPUParticleManager()
-    {
-        const float vertices[] =
-        {
-            -0.5f, 0.5f, 0.0f, 0.0f,
-            0.5f, 0.5f, 1.0f, 0.0f,
-            -0.5f, -0.5f, 0.0f, 1.0f,
-            0.5f, -0.5f, 1.0f, 1.0f,
-        };
-        glGenBuffers(1, &m_particle_quad);
-        glBindBuffer(GL_ARRAY_BUFFER, m_particle_quad);
-        glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices,
-            GL_STATIC_DRAW);
-        glBindBuffer(GL_ARRAY_BUFFER, 0);
-    }
+    CPUParticleManager();
     // ------------------------------------------------------------------------
     ~CPUParticleManager()
     {

src/graphics/irr_driver.cpp

@@ -638,8 +638,11 @@ void IrrDriver::initDevice()
 #endif
 
 #ifndef SERVER_ONLY
-    if(CVS->isGLSL())
+    if (CVS->isGLSL())
+    {
         m_renderer = new ShaderBasedRenderer();
+        preloadShaders();
+    }
     else
         m_renderer = new FixedPipelineRenderer();
 #endif

src/graphics/post_processing.cpp

@@ -758,6 +758,9 @@ PostProcessing::PostProcessing()
     STKTexManager::getInstance()->addTexture(m_areamap);
     areamap->drop();
 
+    // For preloading shaders
+    MotionBlurShader::getInstance();
+    LightningShader::getInstance();
 }   // PostProcessing
 
 // ----------------------------------------------------------------------------