Allow to use openglrecorder with gles

CMakeLists.txt

@@ -26,7 +26,7 @@ option(USE_SYSTEM_ENET "Use system ENET instead of the built-in version, when av
 option(USE_SYSTEM_GLEW "Use system GLEW instead of the built-in version, when available." ON)
 
 CMAKE_DEPENDENT_OPTION(BUILD_RECORDER "Build opengl recorder" ON
-    "NOT SERVER_ONLY;NOT USE_GLES2;NOT APPLE" OFF)
+    "NOT SERVER_ONLY;NOT APPLE" OFF)
 
 if((UNIX AND NOT APPLE) AND NOT SERVER_ONLY)
     option(ENABLE_WAYLAND_DEVICE "Enable Wayland device for linux build" ON)

src/graphics/central_settings.cpp

@@ -200,6 +200,7 @@ void CentralVideoSettings::init()
             hasSamplerObjects = true;
             hasVertexType2101010Rev = true;
             hasInstancedArrays = true;
+            hasPixelBufferObject = true;
         }
 
         if (!GraphicsRestrictions::isDisabled(GraphicsRestrictions::GR_EXPLICIT_ATTRIB_LOCATION) &&

src/graphics/irr_driver.cpp

@@ -616,6 +616,7 @@ void IrrDriver::initDevice()
         (int x, int y, int w, int h, unsigned int f, unsigned int t, void* d)
         { glReadPixels(x, y, w, h, f, t, d); });
 
+#ifndef USE_GLES2
     ogrRegPBOFunctions([](int n, unsigned int* b) { glGenBuffers(n, b); },
         [](unsigned int t, unsigned int b) { glBindBuffer(t, b); },
         [](unsigned int t, ptrdiff_t s, const void* d, unsigned int u)
@@ -623,6 +624,16 @@ void IrrDriver::initDevice()
         [](int n, const unsigned int* b) { glDeleteBuffers(n, b); },
         [](unsigned int t, unsigned int a) { return glMapBuffer(t, a); },
         [](unsigned int t) { return glUnmapBuffer(t); });
+#else
+    ogrRegPBOFunctionsRange([](int n, unsigned int* b) { glGenBuffers(n, b); },
+        [](unsigned int t, unsigned int b) { glBindBuffer(t, b); },
+        [](unsigned int t, ptrdiff_t s, const void* d, unsigned int u)
+        { glBufferData(t, s, d, u); },
+        [](int n, const unsigned int* b) { glDeleteBuffers(n, b); },
+        [](unsigned int t, ptrdiff_t o, ptrdiff_t l, unsigned int a) 
+        { return glMapBufferRange(t, o, l, a); },
+        [](unsigned int t) { return glUnmapBuffer(t); });
+#endif
 
 #endif