3 files changed, 132 insertions, 0 deletions
diff --git a/src/imgui/examples/example_null/Makefile b/src/imgui/examples/example_null/Makefile
new file mode 100644
index 0000000..9ceb353
--- /dev/null
+++ b/src/imgui/examples/example_null/Makefile
@@ -0,0 +1,92 @@
+#
+# Cross Platform Makefile
+# Compatible with MSYS2/MINGW, Ubuntu 14.04.1 and Mac OS X
+#
+# Important: This is a "null backend" application, with no visible output or interaction!
+# This is used for testing purpose and continuous integration, and has little use for end-user.
+#
+
+# Options
+WITH_EXTRA_WARNINGS ?= 0
+WITH_FREETYPE ?= 0
+
+EXE = example_null
+IMGUI_DIR = ../..
+SOURCES = main.cpp
+SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui_draw.cpp $(IMGUI_DIR)/imgui_tables.cpp $(IMGUI_DIR)/imgui_widgets.cpp
+OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
+UNAME_S := $(shell uname -s)
+
+CXXFLAGS += -std=c++11 -I$(IMGUI_DIR)
+CXXFLAGS += -g -Wall -Wformat
+LIBS =
+
+# We use the WITH_EXTRA_WARNINGS flag on our CI setup to eagerly catch zealous warnings
+ifeq ($(WITH_EXTRA_WARNINGS), 1)
+	CXXFLAGS += -Wno-zero-as-null-pointer-constant -Wno-double-promotion -Wno-variadic-macros
+endif
+
+# We use the WITH_FREETYPE flag on our CI setup to test compiling misc/freetype/imgui_freetype.cpp
+# (only supported on Linux, and note that the imgui_freetype code currently won't be executed)
+ifeq ($(WITH_FREETYPE), 1)
+	SOURCES += $(IMGUI_DIR)/misc/freetype/imgui_freetype.cpp
+	CXXFLAGS += $(shell pkg-config --cflags freetype2)
+	LIBS += $(shell pkg-config --libs freetype2)
+endif
+
+##---------------------------------------------------------------------
+## BUILD FLAGS PER PLATFORM
+##---------------------------------------------------------------------
+
+ifeq ($(UNAME_S), Linux) #LINUX
+	ECHO_MESSAGE = "Linux"
+	ifeq ($(WITH_EXTRA_WARNINGS), 1)
+		CXXFLAGS += -Wextra -Wpedantic
+		ifeq ($(shell $(CXX) -v 2>&1 | grep -c "clang version"), 1)
+			CXXFLAGS += -Wshadow -Wsign-conversion
+		endif
+	endif
+	CFLAGS = $(CXXFLAGS)
+endif
+
+ifeq ($(UNAME_S), Darwin) #APPLE
+	ECHO_MESSAGE = "Mac OS X"
+	ifeq ($(WITH_EXTRA_WARNINGS), 1)
+		CXXFLAGS += -Weverything -Wno-reserved-id-macro -Wno-c++98-compat-pedantic -Wno-padded -Wno-poison-system-directories
+	endif
+	CFLAGS = $(CXXFLAGS)
+endif
+
+ifeq ($(OS), Windows_NT)
+	ECHO_MESSAGE = "MinGW"
+	ifeq ($(WITH_EXTRA_WARNINGS), 1)
+		CXXFLAGS += -Wextra -Wpedantic
+	endif
+	LIBS += -limm32
+	CFLAGS = $(CXXFLAGS)
+endif
+
+##---------------------------------------------------------------------
+## BUILD RULES
+##---------------------------------------------------------------------
+
+%.o:%.cpp
+	$(CXX) $(CXXFLAGS) -c -o $@ $<
+
+%.o:$(IMGUI_DIR)/%.cpp
+	$(CXX) $(CXXFLAGS) -c -o $@ $<
+
+%.o:$(IMGUI_DIR)/backends/%.cpp
+	$(CXX) $(CXXFLAGS) -c -o $@ $<
+
+%.o:$(IMGUI_DIR)/misc/freetype/%.cpp
+	$(CXX) $(CXXFLAGS) -c -o $@ $<
+
+all: $(EXE)
+	@echo Build complete for $(ECHO_MESSAGE)
+
+$(EXE): $(OBJS)
+	$(CXX) -o $@ $^ $(CXXFLAGS) $(LIBS)
+
+clean:
+	rm -f $(EXE) $(OBJS)
diff --git a/src/imgui/examples/example_null/build_win32.bat b/src/imgui/examples/example_null/build_win32.bat
new file mode 100644
index 0000000..be81d80
--- /dev/null
+++ b/src/imgui/examples/example_null/build_win32.bat
@@ -0,0 +1,3 @@
+@REM Build for Visual Studio compiler. Run your copy of vcvars32.bat or vcvarsall.bat to setup command-line compiler.
+mkdir Debug
+cl /nologo /Zi /MD /utf-8 /I ..\.. %* *.cpp ..\..\*.cpp /FeDebug/example_null.exe /FoDebug/ /link gdi32.lib shell32.lib imm32.lib
diff --git a/src/imgui/examples/example_null/main.cpp b/src/imgui/examples/example_null/main.cpp
new file mode 100644
index 0000000..f7153cc
--- /dev/null
+++ b/src/imgui/examples/example_null/main.cpp
@@ -0,0 +1,37 @@
+// dear imgui: "null" example application
+// (compile and link imgui, create context, run headless with NO INPUTS, NO GRAPHICS OUTPUT)
+// This is useful to test building, but you cannot interact with anything here!
+#include "imgui.h"
+#include <stdio.h>
+
+int main(int, char**)
+{
+    IMGUI_CHECKVERSION();
+    ImGui::CreateContext();
+    ImGuiIO& io = ImGui::GetIO();
+
+    // Build atlas
+    unsigned char* tex_pixels = nullptr;
+    int tex_w, tex_h;
+    io.Fonts->GetTexDataAsRGBA32(&tex_pixels, &tex_w, &tex_h);
+
+    for (int n = 0; n < 20; n++)
+    {
+        printf("NewFrame() %d\n", n);
+        io.DisplaySize = ImVec2(1920, 1080);
+        io.DeltaTime = 1.0f / 60.0f;
+        ImGui::NewFrame();
+
+        static float f = 0.0f;
+        ImGui::Text("Hello, world!");
+        ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
+        ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate);
+        ImGui::ShowDemoWindow(nullptr);
+
+        ImGui::Render();
+    }
+
+    printf("DestroyContext()\n");
+    ImGui::DestroyContext();
+    return 0;
+}