Update CMake to a more modern module management system and create simple test based on imgui null example

.gitignore

@@ -32,7 +32,10 @@ cimgui/cimgui.sdf
 cimgui/cimgui.v12.suo
 cimgui/Release/
 .idea
-CMakeLists.txt
 cimgui/.vs/
 cimgui/cimgui.vcxproj.user
 cimgui/x64/
+
+# Test / Build
+bld/
+build/

.travis.yml

@@ -1,11 +1,17 @@
 language: cpp
+dist: trusty
 
 os:
   - linux
+  - osx
 
 compiler:
   - gcc
   - clang
 
 script:
-  make
+  - mkdir bld
+  - cd bld
+  - cmake -D CIMGUI_TEST=1 ..
+  - make
+  - ./cimgui_test

CMakeLists.txt

@@ -1,20 +1,15 @@
-Project(cimgui)
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.1)
 
-#general settings
-include_directories(imgui)
-add_definitions("-DIMGUI_DISABLE_OBSOLETE_FUNCTIONS=1")
-
-include_directories(.)
-set(IMGUI_SOURCES ./cimgui.cpp ./imgui/imgui.cpp ./imgui/imgui_draw.cpp ./imgui/imgui_demo.cpp ./imgui/imgui_widgets.cpp)
-
-set(IMGUI_LIBRARIES )
+project(cimgui)
 
-if (WIN32)
-    add_definitions("-DIMGUI_IMPL_API=extern \"C\" __declspec\(dllexport\)")
-else(WIN32)
-    add_definitions("-DIMGUI_IMPL_API=extern \"C\" ")
-endif(WIN32)
+#general settings
+file(GLOB IMGUI_SOURCES
+    cimgui.cpp
+    imgui/imgui.cpp
+    imgui/imgui_draw.cpp
+    imgui/imgui_demo.cpp
+    imgui/imgui_widgets.cpp
+)
 
 set(IMGUI_STATIC "no" CACHE STRING "Build as a static library")
 
@@ -25,12 +20,27 @@ else (IMGUI_STATIC)
     add_library(cimgui SHARED ${IMGUI_SOURCES})
 endif (IMGUI_STATIC)
 
-target_link_libraries(cimgui ${IMGUI_LIBRARIES})
+target_compile_definitions(cimgui PUBLIC IMGUI_DISABLE_OBSOLETE_FUNCTIONS=1)
+if (WIN32)
+    target_compile_definitions(cimgui PUBLIC IMGUI_IMPL_API="extern \"C\" __declspec\(dllexport\)")
+else (WIN32)
+    target_compile_definitions(cimgui PUBLIC IMGUI_IMPL_API="extern \"C\" ")
+endif (WIN32)
+
+target_include_directories(cimgui PUBLIC ${CMAKE_SOURCE_DIR})
+target_include_directories(cimgui PUBLIC ${CMAKE_SOURCE_DIR}/imgui)
 set_target_properties(cimgui PROPERTIES PREFIX "")
 
 #install
 install(TARGETS cimgui
-              RUNTIME DESTINATION  .
-              LIBRARY DESTINATION  .
-              ARCHIVE DESTINATION  .
-              )
+    RUNTIME DESTINATION  .
+    LIBRARY DESTINATION  .
+    ARCHIVE DESTINATION  .
+)
+
+#test
+set(CIMGUI_TEST "no" CACHE STRING "Enable compilation of a test unit based on imgui null")
+
+if (CIMGUI_TEST)
+  add_subdirectory(test)
+endif ()

test/CMakeLists.txt

@@ -0,0 +1,11 @@
+file(GLOB CIMGUI_TEST_SOURCES
+    main.c
+)
+
+add_executable(cimgui_test ${CIMGUI_TEST_SOURCES})
+
+set_target_properties(cimgui_test PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
+set_property(TARGET cimgui_test PROPERTY C_STANDARD 99)
+
+target_compile_definitions(cimgui_test PRIVATE CIMGUI_DEFINE_ENUMS_AND_STRUCTS=1)
+target_link_libraries(cimgui_test PRIVATE cimgui)

test/main.c

@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include <assert.h>
+#include <cimgui.h>
+
+int main(void)
+{
+  assert(igDebugCheckVersionAndDataLayout(igGetVersion(), sizeof(ImGuiIO), sizeof(ImGuiStyle),
+                                          sizeof(ImVec2), sizeof(ImVec4), sizeof(ImDrawVert),
+                                          sizeof(ImDrawIdx)));
+  printf("CreateContext() - v%s\n", igGetVersion());
+  igCreateContext(NULL);
+  ImGuiIO *io = igGetIO();
+
+  unsigned char *text_pixels = NULL;
+  int text_w, text_h;
+  ImFontAtlas_GetTexDataAsRGBA32(io->Fonts, &text_pixels, &text_w, &text_h, NULL);
+
+  for (int n = 0; n < 20; n++) {
+    printf("NewFrame() %d\n", n);
+
+    ImVec2 display_size;
+    display_size.x = 1920;
+    display_size.y = 1080;
+    io->DisplaySize = display_size;
+    io->DeltaTime = 1.0f / 60.0f;
+    igNewFrame();
+
+    static float f = 0.0f;
+    igText("Hello World!");
+    igSliderFloat("float", &f, 0.0f, 1.0f, "%.3f", 1.0f);
+    igText("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / io->Framerate, io->Framerate);
+    igShowDemoWindow(NULL);
+
+    igRender();
+  }
+
+  printf("DestroyContext()\n");
+  igDestroyContext(NULL);
+
+  return 0;
+}

testbuildc/build.bat

@@ -1,6 +0,0 @@
-:: set PATH=%PATH%;C:\mingw32\bin;
-set PATH=%PATH%;C:\i686-7.2.0-release-posix-dwarf-rt_v5-rev1\mingw32\bin;
-::gcc -std=c99 -DCIMGUI_DEFINE_ENUMS_AND_STRUCTS cimgui.h
-::gcc  -DCIMGUI_DEFINE_ENUMS_AND_STRUCTS cimgui.h
-gcc  -std=c99 -Wall -Wpedantic -DCIMGUI_DEFINE_ENUMS_AND_STRUCTS cimguitest.c
-cmd /k

testbuildc/cimguitest.c

@@ -1,6 +0,0 @@
-#include "../cimgui.h"
-
-int main(void)
-{
-	return 0;
-}

testbuildc/testcl.bat

@@ -1,13 +0,0 @@
-::set PATH=%PATH%;C:\luaGL;C:\mingw32\bin;
-::gcc -E -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS -DIMGUI_API="" -DIMGUI_IMPL_API="" ../imgui/imgui.h > 11.txt
-
-::set PATH=%PATH%;C:\luaGL;
-::set PATH=%PATH%;C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.15.26726\bin\Hostx64\x64;
-
-::ejecutar en cmd esto 
-::"C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvars64.bat"
-
-::cl /P /DIMGUI_DISABLE_OBSOLETE_FUNCTIONS /DIMGUI_API="" /DIMGUI_IMPL_API="" ../imgui/imgui.h 
-:: > clout.txt
-cl  /P /DCIMGUI_DEFINE_ENUMS_AND_STRUCTS cimguitest.c
-cmd /k