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Examples: refactor all examples with a MainLoopStep() function, to facilitate use with Emscripten. (#2492, #3699)

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Aligned all examples.
This commit is contained in:
ocornut 2023-02-02 16:27:33 +01:00
parent b51919dce1
commit 96ab68eee0
18 changed files with 1348 additions and 1178 deletions
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4
docs/CHANGELOG.txt
View File

@ -95,6 +95,10 @@ All changes:
Latest Emscripten seems to emit correct values.
- Backend: WebGPU: Fix building for latest WebGPU specs (remove implicit layout generation).
(#6117, #4116, #3632) [@tonygrue, @bfierz]
- Examples: refactord all examples to use a "MainLoopStep()" function. This is in order
to be able to trivially make some compile with Emscripten. (#2492, #3699)
While not all examples are expected to compile on Emscripten, we try to keep all of them
as close as possible to each others.
- Examples: Win32: Fixed examples using RegisterClassW() since 1.89 to also call
DefWindowProcW() instead of DefWindowProc() so that title text are correctly converted
when application is compiled without /DUNICODE. (#5725, #5961, #5975) [@markreidvfx]

48
examples/example_allegro5/main.cpp
View File

@ -16,6 +16,10 @@
#include "imgui.h"
#include "imgui_impl_allegro5.h"
// Forward declarations of helper functions
bool MainLoopStep(ALLEGRO_DISPLAY* display, ALLEGRO_EVENT_QUEUE* queue);
// Main code
int main(int, char**)
{
// Setup Allegro
@ -23,6 +27,8 @@ int main(int, char**)
al_install_keyboard();
al_install_mouse();
al_init_primitives_addon();
// Create window with graphics context and event queue
al_set_new_display_flags(ALLEGRO_RESIZABLE);
ALLEGRO_DISPLAY* display = al_create_display(1280, 720);
al_set_window_title(display, "Dear ImGui Allegro 5 example");
@ -60,25 +66,36 @@ int main(int, char**)
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
bool running = true;
while (running)
while (true)
{
if (!MainLoopStep(display, queue))
break;
}
// Cleanup
ImGui_ImplAllegro5_Shutdown();
ImGui::DestroyContext();
al_destroy_event_queue(queue);
al_destroy_display(display);
return 0;
}
bool MainLoopStep(ALLEGRO_DISPLAY* display, ALLEGRO_EVENT_QUEUE* queue)
{
// Poll and handle events (inputs, window resize, etc.)
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
bool done = false;
ALLEGRO_EVENT ev;
while (al_get_next_event(queue, &ev))
{
ImGui_ImplAllegro5_ProcessEvent(&ev);
if (ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE)
running = false;
done = true;
if (ev.type == ALLEGRO_EVENT_DISPLAY_RESIZE)
{
ImGui_ImplAllegro5_InvalidateDeviceObjects();
@ -86,11 +103,19 @@ int main(int, char**)
ImGui_ImplAllegro5_CreateDeviceObjects();
}
}
if (done)
return false;
// Start the Dear ImGui frame
ImGui_ImplAllegro5_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -133,13 +158,6 @@ int main(int, char**)
al_clear_to_color(al_map_rgba_f(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w));
ImGui_ImplAllegro5_RenderDrawData(ImGui::GetDrawData());
al_flip_display();
}
// Cleanup
ImGui_ImplAllegro5_Shutdown();
ImGui::DestroyContext();
al_destroy_event_queue(queue);
al_destroy_display(display);
return 0;
return true;
}

126
examples/example_android_opengl3/main.cpp
View File

@ -21,11 +21,72 @@ static char g_LogTag[] = "ImGuiExample";
static std::string g_IniFilename = "";
// Forward declarations of helper functions
static void Init(struct android_app* app);
static void Shutdown();
static void MainLoopStep();
static int ShowSoftKeyboardInput();
static int PollUnicodeChars();
static int GetAssetData(const char* filename, void** out_data);
void init(struct android_app* app)
// Main code
static void handleAppCmd(struct android_app* app, int32_t appCmd)
{
switch (appCmd)
{
case APP_CMD_SAVE_STATE:
break;
case APP_CMD_INIT_WINDOW:
Init(app);
break;
case APP_CMD_TERM_WINDOW:
Shutdown();
break;
case APP_CMD_GAINED_FOCUS:
case APP_CMD_LOST_FOCUS:
break;
}
}
static int32_t handleInputEvent(struct android_app* app, AInputEvent* inputEvent)
{
return ImGui_ImplAndroid_HandleInputEvent(inputEvent);
}
void android_main(struct android_app* app)
{
app->onAppCmd = handleAppCmd;
app->onInputEvent = handleInputEvent;
while (true)
{
int out_events;
struct android_poll_source* out_data;
// Poll all events. If the app is not visible, this loop blocks until g_Initialized == true.
while (ALooper_pollAll(g_Initialized ? 0 : -1, NULL, &out_events, (void**)&out_data) >= 0)
{
// Process one event
if (out_data != NULL)
out_data->process(app, out_data);
// Exit the app by returning from within the infinite loop
if (app->destroyRequested != 0)
{
// shutdown() should have been called already while processing the
// app command APP_CMD_TERM_WINDOW. But we play save here
if (!g_Initialized)
Shutdown();
return;
}
}
// Initiate a new frame
MainLoopStep();
}
}
void Init(struct android_app* app)
{
if (g_Initialized)
return;
@ -125,13 +186,14 @@ void init(struct android_app* app)
g_Initialized = true;
}
void tick()
void MainLoopStep()
{
ImGuiIO& io = ImGui::GetIO();
if (g_EglDisplay == EGL_NO_DISPLAY)
return;
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
@ -197,7 +259,7 @@ void tick()
eglSwapBuffers(g_EglDisplay, g_EglSurface);
}
void shutdown()
void Shutdown()
{
if (!g_Initialized)
return;
@ -228,63 +290,7 @@ void shutdown()
g_Initialized = false;
}
static void handleAppCmd(struct android_app* app, int32_t appCmd)
{
switch (appCmd)
{
case APP_CMD_SAVE_STATE:
break;
case APP_CMD_INIT_WINDOW:
init(app);
break;
case APP_CMD_TERM_WINDOW:
shutdown();
break;
case APP_CMD_GAINED_FOCUS:
break;
case APP_CMD_LOST_FOCUS:
break;
}
}
static int32_t handleInputEvent(struct android_app* app, AInputEvent* inputEvent)
{
return ImGui_ImplAndroid_HandleInputEvent(inputEvent);
}
void android_main(struct android_app* app)
{
app->onAppCmd = handleAppCmd;
app->onInputEvent = handleInputEvent;
while (true)
{
int out_events;
struct android_poll_source* out_data;
// Poll all events. If the app is not visible, this loop blocks until g_Initialized == true.
while (ALooper_pollAll(g_Initialized ? 0 : -1, NULL, &out_events, (void**)&out_data) >= 0)
{
// Process one event
if (out_data != NULL)
out_data->process(app, out_data);
// Exit the app by returning from within the infinite loop
if (app->destroyRequested != 0)
{
// shutdown() should have been called already while processing the
// app command APP_CMD_TERM_WINDOW. But we play save here
if (!g_Initialized)
shutdown();
return;
}
}
// Initiate a new frame
tick();
}
}
// Helper functions
// Unfortunately, there is no way to show the on-screen input from native code.
// Therefore, we call ShowSoftKeyboardInput() of the main activity implemented in MainActivity.kt via JNI.

33
examples/example_emscripten_wgpu/main.cpp
View File

@ -21,17 +21,13 @@ static WGPUSwapChain wgpu_swap_chain = NULL;
static int wgpu_swap_chain_width = 0;
static int wgpu_swap_chain_height = 0;
// States tracked across render frames
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Forward declarations
static bool init_wgpu();
static void main_loop(void* window);
static void MainLoopStep(void* window);
static bool InitWGPU();
static void print_glfw_error(int error, const char* description);
static void print_wgpu_error(WGPUErrorType error_type, const char* message, void*);
// Main code
int main(int, char**)
{
glfwSetErrorCallback(print_glfw_error);
@ -39,9 +35,8 @@ int main(int, char**)
return 1;
// Make sure GLFW does not initialize any graphics context.
// This needs to be done explicitly later
// This needs to be done explicitly later.
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
GLFWwindow* window = glfwCreateWindow(1280, 720, "Dear ImGui GLFW+WebGPU example", NULL, NULL);
if (!window)
{
@ -50,7 +45,7 @@ int main(int, char**)
}
// Initialize the WebGPU environment
if (!init_wgpu())
if (!InitWGPU())
{
if (window)
glfwDestroyWindow(window);
@ -101,12 +96,12 @@ int main(int, char**)
// This function will directly return and exit the main function.
// Make sure that no required objects get cleaned up.
// This way we can use the browsers 'requestAnimationFrame' to control the rendering.
emscripten_set_main_loop_arg(main_loop, window, 0, false);
emscripten_set_main_loop_arg(MainLoopStep, window, 0, false);
return 0;
}
static bool init_wgpu()
static bool InitWGPU()
{
wgpu_device = emscripten_webgpu_get_device();
if (!wgpu_device)
@ -130,7 +125,7 @@ static bool init_wgpu()
return true;
}
static void main_loop(void* window)
static void MainLoopStep(void* window)
{
glfwPollEvents();
@ -141,13 +136,10 @@ static void main_loop(void* window)
if (width != wgpu_swap_chain_width && height != wgpu_swap_chain_height)
{
ImGui_ImplWGPU_InvalidateDeviceObjects();
if (wgpu_swap_chain)
wgpuSwapChainRelease(wgpu_swap_chain);
wgpu_swap_chain_width = width;
wgpu_swap_chain_height = height;
WGPUSwapChainDescriptor swap_chain_desc = {};
swap_chain_desc.usage = WGPUTextureUsage_RenderAttachment;
swap_chain_desc.format = WGPUTextureFormat_RGBA8Unorm;
@ -155,7 +147,6 @@ static void main_loop(void* window)
swap_chain_desc.height = height;
swap_chain_desc.presentMode = WGPUPresentMode_Fifo;
wgpu_swap_chain = wgpuDeviceCreateSwapChain(wgpu_device, wgpu_surface, &swap_chain_desc);
ImGui_ImplWGPU_CreateDeviceObjects();
}
@ -164,6 +155,12 @@ static void main_loop(void* window)
ImGui_ImplGlfw_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -229,7 +226,7 @@ static void main_loop(void* window)
static void print_glfw_error(int error, const char* description)
{
printf("Glfw Error %d: %s\n", error, description);
printf("GLFW Error %d: %s\n", error, description);
}
static void print_wgpu_error(WGPUErrorType error_type, const char* message, void*)

49
examples/example_glfw_opengl2/main.cpp
View File

@ -23,22 +23,30 @@
#pragma comment(lib, "legacy_stdio_definitions")
#endif
// Data
static GLFWwindow* g_AppWindow = NULL;
// Forward declarations of helper functions
void MainLoopStep();
static void glfw_error_callback(int error, const char* description)
{
fprintf(stderr, "Glfw Error %d: %s\n", error, description);
fprintf(stderr, "GLFW Error %d: %s\n", error, description);
}
// Main code
int main(int, char**)
{
// Setup window
glfwSetErrorCallback(glfw_error_callback);
if (!glfwInit())
return 1;
// Create window with graphics context
GLFWwindow* window = glfwCreateWindow(1280, 720, "Dear ImGui GLFW+OpenGL2 example", NULL, NULL);
if (window == NULL)
return 1;
glfwMakeContextCurrent(window);
glfwSwapInterval(1); // Enable vsync
g_AppWindow = window;
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
@ -71,19 +79,29 @@ int main(int, char**)
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
while (!glfwWindowShouldClose(window))
MainLoopStep();
// Cleanup
ImGui_ImplOpenGL2_Shutdown();
ImGui_ImplGlfw_Shutdown();
ImGui::DestroyContext();
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}
void MainLoopStep()
{
// Poll and handle events (inputs, window resize, etc.)
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
GLFWwindow* window = g_AppWindow;
glfwPollEvents();
// Start the Dear ImGui frame
@ -91,6 +109,12 @@ int main(int, char**)
ImGui_ImplGlfw_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -147,14 +171,3 @@ int main(int, char**)
glfwMakeContextCurrent(window);
glfwSwapBuffers(window);
}
// Cleanup
ImGui_ImplOpenGL2_Shutdown();
ImGui_ImplGlfw_Shutdown();
ImGui::DestroyContext();
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}

47
examples/example_glfw_opengl3/main.cpp
View File

@ -20,14 +20,19 @@
#pragma comment(lib, "legacy_stdio_definitions")
#endif
// Data
static GLFWwindow* g_AppWindow = NULL;
// Forward declarations of helper functions
void MainLoopStep();
static void glfw_error_callback(int error, const char* description)
{
fprintf(stderr, "Glfw Error %d: %s\n", error, description);
fprintf(stderr, "GLFW Error %d: %s\n", error, description);
}
// Main code
int main(int, char**)
{
// Setup window
glfwSetErrorCallback(glfw_error_callback);
if (!glfwInit())
return 1;
@ -61,6 +66,7 @@ int main(int, char**)
return 1;
glfwMakeContextCurrent(window);
glfwSwapInterval(1); // Enable vsync
g_AppWindow = window;
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
@ -93,19 +99,29 @@ int main(int, char**)
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
while (!glfwWindowShouldClose(window))
MainLoopStep();
// Cleanup
ImGui_ImplOpenGL3_Shutdown();
ImGui_ImplGlfw_Shutdown();
ImGui::DestroyContext();
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}
void MainLoopStep()
{
// Poll and handle events (inputs, window resize, etc.)
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
GLFWwindow* window = g_AppWindow;
glfwPollEvents();
// Start the Dear ImGui frame
@ -113,6 +129,12 @@ int main(int, char**)
ImGui_ImplGlfw_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -161,14 +183,3 @@ int main(int, char**)
glfwSwapBuffers(window);
}
// Cleanup
ImGui_ImplOpenGL3_Shutdown();
ImGui_ImplGlfw_Shutdown();
ImGui::DestroyContext();
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}

67
examples/example_glfw_vulkan/main.cpp
View File

@ -31,6 +31,7 @@
#define IMGUI_VULKAN_DEBUG_REPORT
#endif
// Data
static VkAllocationCallbacks* g_Allocator = NULL;
static VkInstance g_Instance = VK_NULL_HANDLE;
static VkPhysicalDevice g_PhysicalDevice = VK_NULL_HANDLE;
@ -41,10 +42,17 @@ static VkDebugReportCallbackEXT g_DebugReport = VK_NULL_HANDLE;
static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE;
static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE;
static GLFWwindow* g_AppWindow = NULL;
static ImGui_ImplVulkanH_Window g_MainWindowData;
static int g_MinImageCount = 2;
static bool g_SwapChainRebuild = false;
// Forward declarations of helper functions
void MainLoopStep();
static void glfw_error_callback(int error, const char* description)
{
fprintf(stderr, "GLFW Error %d: %s\n", error, description);
}
static void check_vk_result(VkResult err)
{
if (err == 0)
@ -347,22 +355,16 @@ static void FramePresent(ImGui_ImplVulkanH_Window* wd)
wd->SemaphoreIndex = (wd->SemaphoreIndex + 1) % wd->ImageCount; // Now we can use the next set of semaphores
}
static void glfw_error_callback(int error, const char* description)
{
fprintf(stderr, "Glfw Error %d: %s\n", error, description);
}
// Main code
int main(int, char**)
{
// Setup GLFW window
glfwSetErrorCallback(glfw_error_callback);
if (!glfwInit())
return 1;
// Create window with Vulkan context
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
GLFWwindow* window = glfwCreateWindow(1280, 720, "Dear ImGui GLFW+Vulkan example", NULL, NULL);
// Setup Vulkan
if (!glfwVulkanSupported())
{
printf("GLFW: Vulkan Not Supported\n");
@ -371,6 +373,7 @@ int main(int, char**)
uint32_t extensions_count = 0;
const char** extensions = glfwGetRequiredInstanceExtensions(&extensions_count);
SetupVulkan(extensions, extensions_count);
g_AppWindow = window;
// Create Window Surface
VkSurfaceKHR surface;
@ -458,19 +461,34 @@ int main(int, char**)
ImGui_ImplVulkan_DestroyFontUploadObjects();
}
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
while (!glfwWindowShouldClose(window))
MainLoopStep();
// Cleanup
err = vkDeviceWaitIdle(g_Device);
check_vk_result(err);
ImGui_ImplVulkan_Shutdown();
ImGui_ImplGlfw_Shutdown();
ImGui::DestroyContext();
CleanupVulkanWindow();
CleanupVulkan();
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}
void MainLoopStep()
{
// Poll and handle events (inputs, window resize, etc.)
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
GLFWwindow* window = g_AppWindow;
glfwPollEvents();
// Resize swap chain?
@ -492,6 +510,12 @@ int main(int, char**)
ImGui_ImplGlfw_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -535,6 +559,7 @@ int main(int, char**)
const bool is_minimized = (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f);
if (!is_minimized)
{
ImGui_ImplVulkanH_Window* wd = &g_MainWindowData;
wd->ClearValue.color.float32[0] = clear_color.x * clear_color.w;
wd->ClearValue.color.float32[1] = clear_color.y * clear_color.w;
wd->ClearValue.color.float32[2] = clear_color.z * clear_color.w;
@ -543,19 +568,3 @@ int main(int, char**)
FramePresent(wd);
}
}
// Cleanup
err = vkDeviceWaitIdle(g_Device);
check_vk_result(err);
ImGui_ImplVulkan_Shutdown();
ImGui_ImplGlfw_Shutdown();
ImGui::DestroyContext();
CleanupVulkanWindow();
CleanupVulkan();
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}

147
examples/example_glut_opengl2/main.cpp
View File

@ -28,13 +28,86 @@
#pragma warning (disable: 4505) // unreferenced local function has been removed
#endif
// Forward declarations of helper functions
void MainLoopStep();
// Our state
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
void my_display_code()
int main(int argc, char** argv)
{
// Create GLUT window
glutInit(&argc, argv);
#ifdef __FREEGLUT_EXT_H__
glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_GLUTMAINLOOP_RETURNS);
#endif
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_MULTISAMPLE);
glutInitWindowSize(1280, 720);
glutCreateWindow("Dear ImGui GLUT+OpenGL2 Example");
// Setup GLUT display function
// We will also call ImGui_ImplGLUT_InstallFuncs() to get all the other functions installed for us,
// otherwise it is possible to install our own functions and call the imgui_impl_glut.h functions ourselves.
glutDisplayFunc(MainLoopStep);
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
//io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
// Setup Dear ImGui style
ImGui::StyleColorsDark();
//ImGui::StyleColorsLight();
// Setup Platform/Renderer backends
// FIXME: Consider reworking this example to install our own GLUT funcs + forward calls ImGui_ImplGLUT_XXX ones, instead of using ImGui_ImplGLUT_InstallFuncs().
ImGui_ImplGLUT_Init();
ImGui_ImplOpenGL2_Init();
// Install GLUT handlers (glutReshapeFunc(), glutMotionFunc(), glutPassiveMotionFunc(), glutMouseFunc(), glutKeyboardFunc() etc.)
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
ImGui_ImplGLUT_InstallFuncs();
// Load Fonts
// - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
// - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
// - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
// - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
// - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
// - Read 'docs/FONTS.md' for more instructions and details.
// - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
//io.Fonts->AddFontDefault();
//io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
// Main loop
glutMainLoop();
// Cleanup
ImGui_ImplOpenGL2_Shutdown();
ImGui_ImplGLUT_Shutdown();
ImGui::DestroyContext();
return 0;
}
void MainLoopStep()
{
// Start the Dear ImGui frame
ImGui_ImplOpenGL2_NewFrame();
ImGui_ImplGLUT_NewFrame();
// 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);
@ -71,15 +144,6 @@ void my_display_code()
show_another_window = false;
ImGui::End();
}
}
void glut_display_func()
{
// Start the Dear ImGui frame
ImGui_ImplOpenGL2_NewFrame();
ImGui_ImplGLUT_NewFrame();
my_display_code();
// Rendering
ImGui::Render();
@ -93,66 +157,3 @@ void glut_display_func()
glutSwapBuffers();
glutPostRedisplay();
}
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
int main(int argc, char** argv)
{
// Create GLUT window
glutInit(&argc, argv);
#ifdef __FREEGLUT_EXT_H__
glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_GLUTMAINLOOP_RETURNS);
#endif
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_MULTISAMPLE);
glutInitWindowSize(1280, 720);
glutCreateWindow("Dear ImGui GLUT+OpenGL2 Example");
// Setup GLUT display function
// We will also call ImGui_ImplGLUT_InstallFuncs() to get all the other functions installed for us,
// otherwise it is possible to install our own functions and call the imgui_impl_glut.h functions ourselves.
glutDisplayFunc(glut_display_func);
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
//io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
// Setup Dear ImGui style
ImGui::StyleColorsDark();
//ImGui::StyleColorsLight();
// Setup Platform/Renderer backends
// FIXME: Consider reworking this example to install our own GLUT funcs + forward calls ImGui_ImplGLUT_XXX ones, instead of using ImGui_ImplGLUT_InstallFuncs().
ImGui_ImplGLUT_Init();
ImGui_ImplGLUT_InstallFuncs();
ImGui_ImplOpenGL2_Init();
// Load Fonts
// - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
// - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
// - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
// - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
// - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering.
// - Read 'docs/FONTS.md' for more instructions and details.
// - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
//io.Fonts->AddFontDefault();
//io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
glutMainLoop();
// Cleanup
ImGui_ImplOpenGL2_Shutdown();
ImGui_ImplGLUT_Shutdown();
ImGui::DestroyContext();
return 0;
}

60
examples/example_sdl_directx11/main.cpp
View File

@ -12,12 +12,14 @@
#include <SDL_syswm.h>
// Data
static SDL_Window* g_AppWindow = NULL;
static ID3D11Device* g_pd3dDevice = NULL;
static ID3D11DeviceContext* g_pd3dDeviceContext = NULL;
static IDXGISwapChain* g_pSwapChain = NULL;
static ID3D11RenderTargetView* g_mainRenderTargetView = NULL;
// Forward declarations of helper functions
bool MainLoopStep();
bool CreateDeviceD3D(HWND hWnd);
void CleanupDeviceD3D();
void CreateRenderTarget();
@ -42,6 +44,7 @@ int main(int, char**)
SDL_VERSION(&wmInfo.version);
SDL_GetWindowWMInfo(window, &wmInfo);
HWND hwnd = (HWND)wmInfo.info.win.window;
g_AppWindow = window;
// Initialize Direct3D
if (!CreateDeviceD3D(hwnd))
@ -81,28 +84,41 @@ int main(int, char**)
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
bool done = false;
while (!done)
while (true)
{
// Poll and handle events (inputs, window resize, etc.)
if (!MainLoopStep())
break;
}
// Cleanup
ImGui_ImplDX11_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
CleanupDeviceD3D();
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
bool MainLoopStep()
{
// Poll and handle SDL events (inputs, window resize, etc.)
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
SDL_Window* window = g_AppWindow;
SDL_Event event;
while (SDL_PollEvent(&event))
{
ImGui_ImplSDL2_ProcessEvent(&event);
if (event.type == SDL_QUIT)
done = true;
return false;
if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == SDL_GetWindowID(window))
done = true;
return false;
if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_RESIZED && event.window.windowID == SDL_GetWindowID(window))
{
// Release all outstanding references to the swap chain's buffers before resizing.
@ -117,6 +133,12 @@ int main(int, char**)
ImGui_ImplSDL2_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -160,25 +182,13 @@ int main(int, char**)
g_pd3dDeviceContext->OMSetRenderTargets(1, &g_mainRenderTargetView, NULL);
g_pd3dDeviceContext->ClearRenderTargetView(g_mainRenderTargetView, clear_color_with_alpha);
ImGui_ImplDX11_RenderDrawData(ImGui::GetDrawData());
g_pSwapChain->Present(1, 0); // Present with vsync
//g_pSwapChain->Present(0, 0); // Present without vsync
return true;
}
// Cleanup
ImGui_ImplDX11_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
CleanupDeviceD3D();
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
// Helper functions
// Helper functions to use DirectX11
bool CreateDeviceD3D(HWND hWnd)
{
// Setup swap chain

63
examples/example_sdl_opengl2/main.cpp
View File

@ -14,12 +14,16 @@
#include <SDL.h>
#include <SDL_opengl.h>
// Data
static SDL_Window* g_AppWindow = NULL;
// Forward declarations of helper functions
bool MainLoopStep();
// Main code
int main(int, char**)
{
// Setup SDL
// (Some versions of SDL before <2.0.10 appears to have performance/stalling issues on a minority of Windows systems,
// depending on whether SDL_INIT_GAMECONTROLLER is enabled or disabled.. updating to the latest version of SDL is recommended!)
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_GAMECONTROLLER) != 0)
{
printf("Error: %s\n", SDL_GetError());
@ -37,6 +41,7 @@ int main(int, char**)
SDL_GLContext gl_context = SDL_GL_CreateContext(window);
SDL_GL_MakeCurrent(window, gl_context);
SDL_GL_SetSwapInterval(1); // Enable vsync
g_AppWindow = window;
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
@ -69,35 +74,55 @@ int main(int, char**)
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
bool done = false;
while (!done)
while (true)
{
// Poll and handle events (inputs, window resize, etc.)
if (!MainLoopStep())
break;
}
// Cleanup
ImGui_ImplOpenGL2_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
SDL_GL_DeleteContext(gl_context);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
bool MainLoopStep()
{
// Poll and handle SDL events (inputs, window resize, etc.)
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
SDL_Window* window = g_AppWindow;
SDL_Event event;
while (SDL_PollEvent(&event))
{
ImGui_ImplSDL2_ProcessEvent(&event);
if (event.type == SDL_QUIT)
done = true;
return false;
if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == SDL_GetWindowID(window))
done = true;
return false;
}
// Start the Dear ImGui frame
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplOpenGL2_NewFrame();
ImGui_ImplSDL2_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -143,16 +168,6 @@ int main(int, char**)
//glUseProgram(0); // You may want this if using this code in an OpenGL 3+ context where shaders may be bound
ImGui_ImplOpenGL2_RenderDrawData(ImGui::GetDrawData());
SDL_GL_SwapWindow(window);
}
// Cleanup
ImGui_ImplOpenGL2_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
SDL_GL_DeleteContext(gl_context);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
return true;
}

63
examples/example_sdl_opengl3/main.cpp
View File

@ -14,12 +14,16 @@
#include <SDL_opengl.h>
#endif
// Data
static SDL_Window* g_AppWindow = NULL;
// Forward declarations of helper functions
bool MainLoopStep();
// Main code
int main(int, char**)
{
// Setup SDL
// (Some versions of SDL before <2.0.10 appears to have performance/stalling issues on a minority of Windows systems,
// depending on whether SDL_INIT_GAMECONTROLLER is enabled or disabled.. updating to the latest version of SDL is recommended!)
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_GAMECONTROLLER) != 0)
{
printf("Error: %s\n", SDL_GetError());
@ -59,6 +63,7 @@ int main(int, char**)
SDL_GLContext gl_context = SDL_GL_CreateContext(window);
SDL_GL_MakeCurrent(window, gl_context);
SDL_GL_SetSwapInterval(1); // Enable vsync
g_AppWindow = window;
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
@ -91,35 +96,55 @@ int main(int, char**)
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
bool done = false;
while (!done)
while (true)
{
// Poll and handle events (inputs, window resize, etc.)
if (!MainLoopStep())
break;
}
// Cleanup
ImGui_ImplOpenGL3_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
SDL_GL_DeleteContext(gl_context);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
bool MainLoopStep()
{
// Poll and handle SDL events (inputs, window resize, etc.)
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
SDL_Window* window = g_AppWindow;
SDL_Event event;
while (SDL_PollEvent(&event))
{
ImGui_ImplSDL2_ProcessEvent(&event);
if (event.type == SDL_QUIT)
done = true;
return false;
if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == SDL_GetWindowID(window))
done = true;
return false;
}
// Start the Dear ImGui frame
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplSDL2_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -164,16 +189,6 @@ int main(int, char**)
glClear(GL_COLOR_BUFFER_BIT);
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
SDL_GL_SwapWindow(window);
}
// Cleanup
ImGui_ImplOpenGL3_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
SDL_GL_DeleteContext(gl_context);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
return true;
}

68
examples/example_sdl_sdlrenderer/main.cpp
View File

@ -17,29 +17,34 @@
#error This backend requires SDL 2.0.17+ because of SDL_RenderGeometry() function
#endif
// Data
static SDL_Window* g_AppWindow = NULL;
static SDL_Renderer* g_AppWindowRenderer = NULL;
// Forward declarations of helper functions
bool MainLoopStep();
// Main code
int main(int, char**)
{
// Setup SDL
// (Some versions of SDL before <2.0.10 appears to have performance/stalling issues on a minority of Windows systems,
// depending on whether SDL_INIT_GAMECONTROLLER is enabled or disabled.. updating to the latest version of SDL is recommended!)
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_GAMECONTROLLER) != 0)
{
printf("Error: %s\n", SDL_GetError());
return -1;
}
// Setup window
// Create window with SDL_Renderer graphics context
SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL2+SDL_Renderer example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, window_flags);
// Setup SDL_Renderer instance
SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_ACCELERATED);
if (renderer == NULL)
{
SDL_Log("Error creating SDL_Renderer!");
return 0;
}
g_AppWindow = window;
g_AppWindowRenderer = renderer;
//SDL_RendererInfo info;
//SDL_GetRendererInfo(renderer, &info);
//SDL_Log("Current SDL_Renderer: %s", info.name);
@ -75,35 +80,56 @@ int main(int, char**)
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
bool done = false;
while (!done)
while (true)
{
if (!MainLoopStep())
break;
}
// Cleanup
ImGui_ImplSDLRenderer_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
bool MainLoopStep()
{
// Poll and handle events (inputs, window resize, etc.)
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
SDL_Window* window = g_AppWindow;
SDL_Renderer* renderer = g_AppWindowRenderer;
SDL_Event event;
while (SDL_PollEvent(&event))
{
ImGui_ImplSDL2_ProcessEvent(&event);
if (event.type == SDL_QUIT)
done = true;
return false;
if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == SDL_GetWindowID(window))
done = true;
return false;
}
// Start the Dear ImGui frame
ImGuiIO& io = ImGui::GetIO();
ImGui_ImplSDLRenderer_NewFrame();
ImGui_ImplSDL2_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -148,16 +174,6 @@ int main(int, char**)
SDL_RenderClear(renderer);
ImGui_ImplSDLRenderer_RenderDrawData(ImGui::GetDrawData());
SDL_RenderPresent(renderer);
}
// Cleanup
ImGui_ImplSDLRenderer_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
return true;
}

2
examples/example_sdl_vulkan/example_sdl_vulkan.vcxproj.filters
View File

@ -32,7 +32,7 @@
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="..\..\imgui_tables.cpp">
<Filter>sources</Filter>
<Filter>imgui</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>

71
examples/example_sdl_vulkan/main.cpp
View File

@ -23,6 +23,7 @@
#define IMGUI_VULKAN_DEBUG_REPORT
#endif
// Data
static VkAllocationCallbacks* g_Allocator = NULL;
static VkInstance g_Instance = VK_NULL_HANDLE;
static VkPhysicalDevice g_PhysicalDevice = VK_NULL_HANDLE;
@ -33,10 +34,14 @@ static VkDebugReportCallbackEXT g_DebugReport = VK_NULL_HANDLE;
static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE;
static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE;
static SDL_Window* g_AppWindow = NULL;
static ImGui_ImplVulkanH_Window g_MainWindowData;
static uint32_t g_MinImageCount = 2;
static bool g_SwapChainRebuild = false;
// Forward declarations of helper functions
bool MainLoopStep();
static void check_vk_result(VkResult err)
{
if (err == 0)
@ -339,6 +344,7 @@ static void FramePresent(ImGui_ImplVulkanH_Window* wd)
wd->SemaphoreIndex = (wd->SemaphoreIndex + 1) % wd->ImageCount; // Now we can use the next set of semaphores
}
// Main code
int main(int, char**)
{
// Setup SDL
@ -348,17 +354,16 @@ int main(int, char**)
return -1;
}
// Setup window
// Create window with Vulkan graphics context
SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_VULKAN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL2+Vulkan example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, window_flags);
// Setup Vulkan
uint32_t extensions_count = 0;
SDL_Vulkan_GetInstanceExtensions(window, &extensions_count, NULL);
const char** extensions = new const char*[extensions_count];
SDL_Vulkan_GetInstanceExtensions(window, &extensions_count, extensions);
SetupVulkan(extensions, extensions_count);
delete[] extensions;
g_AppWindow = window;
// Create Window Surface
VkSurfaceKHR surface;
@ -450,28 +455,45 @@ int main(int, char**)
ImGui_ImplVulkan_DestroyFontUploadObjects();
}
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
bool done = false;
while (!done)
while (true)
{
if (!MainLoopStep())
break;
}
// Cleanup
err = vkDeviceWaitIdle(g_Device);
check_vk_result(err);
ImGui_ImplVulkan_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
CleanupVulkanWindow();
CleanupVulkan();
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
bool MainLoopStep()
{
// Poll and handle events (inputs, window resize, etc.)
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
SDL_Window* window = g_AppWindow;
SDL_Event event;
while (SDL_PollEvent(&event))
{
ImGui_ImplSDL2_ProcessEvent(&event);
if (event.type == SDL_QUIT)
done = true;
return false;
if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == SDL_GetWindowID(window))
done = true;
return false;
}
// Resize swap chain?
@ -493,6 +515,12 @@ int main(int, char**)
ImGui_ImplSDL2_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -536,6 +564,7 @@ int main(int, char**)
const bool is_minimized = (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f);
if (!is_minimized)
{
ImGui_ImplVulkanH_Window* wd = &g_MainWindowData;
wd->ClearValue.color.float32[0] = clear_color.x * clear_color.w;
wd->ClearValue.color.float32[1] = clear_color.y * clear_color.w;
wd->ClearValue.color.float32[2] = clear_color.z * clear_color.w;
@ -543,20 +572,6 @@ int main(int, char**)
FrameRender(wd, draw_data);
FramePresent(wd);
}
}
// Cleanup
err = vkDeviceWaitIdle(g_Device);
check_vk_result(err);
ImGui_ImplVulkan_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
CleanupVulkanWindow();
CleanupVulkan();
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
return true;
}

49
examples/example_win32_directx10/main.cpp
View File

@ -15,6 +15,7 @@ static IDXGISwapChain* g_pSwapChain = NULL;
static ID3D10RenderTargetView* g_mainRenderTargetView = NULL;
// Forward declarations of helper functions
bool MainLoopStep();
bool CreateDeviceD3D(HWND hWnd);
void CleanupDeviceD3D();
void CreateRenderTarget();
@ -73,17 +74,30 @@ int main(int, char**)
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
bool done = false;
while (!done)
while (true)
{
if (!MainLoopStep())
break;
}
// Cleanup
ImGui_ImplDX10_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();
CleanupDeviceD3D();
::DestroyWindow(hwnd);
::UnregisterClassW(wc.lpszClassName, wc.hInstance);
return 0;
}
bool MainLoopStep()
{
// Poll and handle messages (inputs, window resize, etc.)
// See the WndProc() function below for our to dispatch events to the Win32 backend.
// See the WndProc() function below where we dispatch events to the imgui_impl_win32 backend.
bool done = false;
MSG msg;
while (::PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
{
@ -93,13 +107,19 @@ int main(int, char**)
done = true;
}
if (done)
break;
return false;
// Start the Dear ImGui frame
ImGui_ImplDX10_NewFrame();
ImGui_ImplWin32_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -146,17 +166,8 @@ int main(int, char**)
g_pSwapChain->Present(1, 0); // Present with vsync
//g_pSwapChain->Present(0, 0); // Present without vsync
}
ImGui_ImplDX10_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();
CleanupDeviceD3D();
::DestroyWindow(hwnd);
::UnregisterClassW(wc.lpszClassName, wc.hInstance);
return 0;
return true;
}
// Helper functions

51
examples/example_win32_directx11/main.cpp
View File

@ -15,6 +15,7 @@ static IDXGISwapChain* g_pSwapChain = NULL;
static ID3D11RenderTargetView* g_mainRenderTargetView = NULL;
// Forward declarations of helper functions
bool MainLoopStep();
bool CreateDeviceD3D(HWND hWnd);
void CleanupDeviceD3D();
void CreateRenderTarget();
@ -73,17 +74,30 @@ int main(int, char**)
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
bool done = false;
while (!done)
while (true)
{
if (!MainLoopStep())
break;
}
// Cleanup
ImGui_ImplDX11_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();
CleanupDeviceD3D();
::DestroyWindow(hwnd);
::UnregisterClassW(wc.lpszClassName, wc.hInstance);
return 0;
}
bool MainLoopStep()
{
// Poll and handle messages (inputs, window resize, etc.)
// See the WndProc() function below for our to dispatch events to the Win32 backend.
// See the WndProc() function below where we dispatch events to the imgui_impl_win32 backend.
bool done = false;
MSG msg;
while (::PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
{
@ -93,13 +107,19 @@ int main(int, char**)
done = true;
}
if (done)
break;
return false;
// Start the Dear ImGui frame
ImGui_ImplDX11_NewFrame();
ImGui_ImplWin32_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -146,18 +166,7 @@ int main(int, char**)
g_pSwapChain->Present(1, 0); // Present with vsync
//g_pSwapChain->Present(0, 0); // Present without vsync
}
// Cleanup
ImGui_ImplDX11_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();
CleanupDeviceD3D();
::DestroyWindow(hwnd);
::UnregisterClassW(wc.lpszClassName, wc.hInstance);
return 0;
return true;
}
// Helper functions

53
examples/example_win32_directx12/main.cpp
View File

@ -48,6 +48,7 @@ static ID3D12Resource* g_mainRenderTargetResource[NUM_BACK_BUFFERS]
static D3D12_CPU_DESCRIPTOR_HANDLE g_mainRenderTargetDescriptor[NUM_BACK_BUFFERS] = {};
// Forward declarations of helper functions
bool MainLoopStep();
bool CreateDeviceD3D(HWND hWnd);
void CleanupDeviceD3D();
void CreateRenderTarget();
@ -111,17 +112,31 @@ int main(int, char**)
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
bool done = false;
while (!done)
while (true)
{
if (!MainLoopStep())
break;
}
// Cleanup
WaitForLastSubmittedFrame();
ImGui_ImplDX12_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();
CleanupDeviceD3D();
::DestroyWindow(hwnd);
::UnregisterClassW(wc.lpszClassName, wc.hInstance);
return 0;
}
bool MainLoopStep()
{
// Poll and handle messages (inputs, window resize, etc.)
// See the WndProc() function below for our to dispatch events to the Win32 backend.
// See the WndProc() function below where we dispatch events to the imgui_impl_win32 backend.
bool done = false;
MSG msg;
while (::PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
{
@ -131,13 +146,19 @@ int main(int, char**)
done = true;
}
if (done)
break;
return false;
// Start the Dear ImGui frame
ImGui_ImplDX12_NewFrame();
ImGui_ImplWin32_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -212,20 +233,8 @@ int main(int, char**)
g_pd3dCommandQueue->Signal(g_fence, fenceValue);
g_fenceLastSignaledValue = fenceValue;
frameCtx->FenceValue = fenceValue;
}
WaitForLastSubmittedFrame();
// Cleanup
ImGui_ImplDX12_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();
CleanupDeviceD3D();
::DestroyWindow(hwnd);
::UnregisterClassW(wc.lpszClassName, wc.hInstance);
return 0;
return true;
}
// Helper functions

49
examples/example_win32_directx9/main.cpp
View File

@ -14,6 +14,7 @@ static LPDIRECT3DDEVICE9 g_pd3dDevice = NULL;
static D3DPRESENT_PARAMETERS g_d3dpp = {};
// Forward declarations of helper functions
bool MainLoopStep();
bool CreateDeviceD3D(HWND hWnd);
void CleanupDeviceD3D();
void ResetDevice();
@ -71,17 +72,30 @@ int main(int, char**)
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
//IM_ASSERT(font != NULL);
// Our state
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// Main loop
bool done = false;
while (!done)
while (true)
{
if (!MainLoopStep())
break;
}
// Cleanup
ImGui_ImplDX9_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();
CleanupDeviceD3D();
::DestroyWindow(hwnd);
::UnregisterClassW(wc.lpszClassName, wc.hInstance);
return 0;
}
bool MainLoopStep()
{
// Poll and handle messages (inputs, window resize, etc.)
// See the WndProc() function below for our to dispatch events to the Win32 backend.
// See the WndProc() function below where we dispatch events to the imgui_impl_win32 backend.
bool done = false;
MSG msg;
while (::PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE))
{
@ -91,13 +105,19 @@ int main(int, char**)
done = true;
}
if (done)
break;
return false;
// Start the Dear ImGui frame
ImGui_ImplDX9_NewFrame();
ImGui_ImplWin32_NewFrame();
ImGui::NewFrame();
// Our state
// (we use static, which essentially makes the variable globals, as a convenience to keep the example code easy to follow)
static bool show_demo_window = true;
static bool show_another_window = false;
static ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
// 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);
@ -153,17 +173,8 @@ int main(int, char**)
// Handle loss of D3D9 device
if (result == D3DERR_DEVICELOST && g_pd3dDevice->TestCooperativeLevel() == D3DERR_DEVICENOTRESET)
ResetDevice();
}
ImGui_ImplDX9_Shutdown();
ImGui_ImplWin32_Shutdown();
ImGui::DestroyContext();
CleanupDeviceD3D();
::DestroyWindow(hwnd);
::UnregisterClassW(wc.lpszClassName, wc.hInstance);
return 0;
return true;
}
// Helper functions