diff --git a/examples/example_sdl_opengl3/main.cpp b/examples/example_sdl_opengl3/main.cpp
index 83d72881..81fe2649 100644
--- a/examples/example_sdl_opengl3/main.cpp
+++ b/examples/example_sdl_opengl3/main.cpp
@@ -22,6 +22,8 @@
 #include IMGUI_IMPL_OPENGL_LOADER_CUSTOM
 #endif
 
+#define BITMAP_FONT_TEST 1
+
 int main(int, char**)
 {
     // Setup SDL
@@ -104,6 +106,41 @@ int main(int, char**)
     //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
     //IM_ASSERT(font != NULL);
 
+#if BITMAP_FONT_TEST
+    static ImWchar const ranges[] = { 0x20, 0x7f, 0 };
+
+    ImFontAtlas *atlas = IM_NEW(ImFontAtlas)();
+    atlas->TexWidth = 128;
+    atlas->TexHeight = 128;
+    atlas->TexUvScale = ImVec2(1.f / 128, 1.f / 128);
+
+    ImFontConfig config;
+    config.FontData = malloc(1);
+    config.FontDataSize = 1;
+    config.FontDataOwnedByAtlas = false;
+    config.SizePixels = 8;
+    config.GlyphRanges = ranges;
+    ImFont *font = atlas->AddFont(&config);
+
+    // Operations copied from ImFontAtlasBuildSetupFont()
+    font->FontSize = config.SizePixels;
+    font->ConfigData = &atlas->ConfigData[0];
+    font->ContainerAtlas = atlas;
+    font->Ascent = 0;
+    font->Descent = config.SizePixels;
+    font->ConfigDataCount++;
+
+    // Add some glyphs from a hypothetical regular grid
+    for (int ch = 0x20; ch < 0x80; ++ch)
+    {
+        font->AddGlyph(ch, 0, 0, 6, 8, (ch % 0x10) * 8.f / 128, (ch / 0x10) * 8.f / 128, (ch % 0x10 + 1) * 8.f / 128, (ch / 0x10 + 1) * 8.f / 128, 6);
+    }
+    font->BuildLookupTable();
+
+    // Fake texture ID for testing purposes
+    atlas->TexID = io.Fonts->TexID;
+#endif
+
     bool show_demo_window = true;
     bool show_another_window = false;
     ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
@@ -132,6 +169,10 @@ int main(int, char**)
         ImGui_ImplSDL2_NewFrame(window);
         ImGui::NewFrame();
 
+#if BITMAP_FONT_TEST
+        ImGui::PushFont(font);
+#endif
+
         // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).
         if (show_demo_window)
             ImGui::ShowDemoWindow(&show_demo_window);
@@ -169,6 +210,10 @@ int main(int, char**)
             ImGui::End();
         }
 
+#if BITMAP_FONT_TEST
+        ImGui::PopFont();
+#endif
+
         // Rendering
         ImGui::Render();
         SDL_GL_MakeCurrent(window, gl_context);