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Backends: SDL3: update to run with SDL3. Examples: Add SDL3+Gl example. Remove some version checks. (#6146)

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More update upcoming in docking branch.
This commit is contained in:
ocornut 2023-02-07 13:49:37 +01:00
parent d9bf80f655
commit 13fbd99491
12 changed files with 780 additions and 102 deletions
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177
backends/imgui_impl_sdl3.cpp
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@ -1,15 +1,13 @@
// dear imgui: Platform Backend for SDL3 // dear imgui: Platform Backend for SDL3 (*EXPERIMENTAL*)
// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..) // This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
// (Info: SDL3 is a cross-platform general purpose library for handling windows, inputs, graphics context creation, etc.) // (Info: SDL3 is a cross-platform general purpose library for handling windows, inputs, graphics context creation, etc.)
// (Prefer SDL 2.0.5+ for full feature support.) // (IMPORTANT: SDL 3.0.0 is NOT YET RELEASED. IT IS POSSIBLE THAT ITS SPECS/API WILL CHANGE BEFORE RELEASE)
// Implemented features: // Implemented features:
// [X] Platform: Clipboard support. // [X] Platform: Clipboard support.
// [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy SDL_SCANCODE_* values will also be supported unless IMGUI_DISABLE_OBSOLETE_KEYIO is set] // [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy SDL_SCANCODE_* values will also be supported unless IMGUI_DISABLE_OBSOLETE_KEYIO is set]
// [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'. // [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. // [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
// Missing features:
// [ ] Platform: SDL3 handling of IME under Windows appears to be broken and it explicitly disable the regular Windows IME. You can restore Windows IME by compiling SDL with SDL_DISABLE_WINDOWS_IME.
// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this. // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need. // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@ -24,18 +22,17 @@
#include "imgui_impl_sdl3.h" #include "imgui_impl_sdl3.h"
// SDL // SDL
#include <SDL.h> #include <SDL3/SDL.h>
#include <SDL_syswm.h> #include <SDL3/SDL_syswm.h>
#if defined(__APPLE__) #if defined(__APPLE__)
#include <TargetConditionals.h> #include <TargetConditionals.h>
#endif #endif
#if SDL_VERSION_ATLEAST(2,0,4) && !defined(__EMSCRIPTEN__) && !defined(__ANDROID__) && !(defined(__APPLE__) && TARGET_OS_IOS) && !defined(__amigaos4__) #if !defined(__EMSCRIPTEN__) && !defined(__ANDROID__) && !(defined(__APPLE__) && TARGET_OS_IOS) && !defined(__amigaos4__)
#define SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE 1 #define SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE 1
#else #else
#define SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE 0 #define SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE 0
#endif #endif
#define SDL_HAS_VULKAN SDL_VERSION_ATLEAST(2,0,6)
// SDL Data // SDL Data
struct ImGui_ImplSDL3_Data struct ImGui_ImplSDL3_Data
@ -194,10 +191,10 @@ static ImGuiKey ImGui_ImplSDL3_KeycodeToImGuiKey(int keycode)
static void ImGui_ImplSDL3_UpdateKeyModifiers(SDL_Keymod sdl_key_mods) static void ImGui_ImplSDL3_UpdateKeyModifiers(SDL_Keymod sdl_key_mods)
{ {
ImGuiIO& io = ImGui::GetIO(); ImGuiIO& io = ImGui::GetIO();
io.AddKeyEvent(ImGuiMod_Ctrl, (sdl_key_mods & KMOD_CTRL) != 0); io.AddKeyEvent(ImGuiMod_Ctrl, (sdl_key_mods & SDL_KMOD_CTRL) != 0);
io.AddKeyEvent(ImGuiMod_Shift, (sdl_key_mods & KMOD_SHIFT) != 0); io.AddKeyEvent(ImGuiMod_Shift, (sdl_key_mods & SDL_KMOD_SHIFT) != 0);
io.AddKeyEvent(ImGuiMod_Alt, (sdl_key_mods & KMOD_ALT) != 0); io.AddKeyEvent(ImGuiMod_Alt, (sdl_key_mods & SDL_KMOD_ALT) != 0);
io.AddKeyEvent(ImGuiMod_Super, (sdl_key_mods & KMOD_GUI) != 0); io.AddKeyEvent(ImGuiMod_Super, (sdl_key_mods & SDL_KMOD_GUI) != 0);
} }
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs. // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
@ -212,30 +209,25 @@ bool ImGui_ImplSDL3_ProcessEvent(const SDL_Event* event)
switch (event->type) switch (event->type)
{ {
case SDL_MOUSEMOTION: case SDL_EVENT_MOUSE_MOTION:
{ {
ImVec2 mouse_pos((float)event->motion.x, (float)event->motion.y); ImVec2 mouse_pos((float)event->motion.x, (float)event->motion.y);
io.AddMousePosEvent(mouse_pos.x, mouse_pos.y); io.AddMousePosEvent(mouse_pos.x, mouse_pos.y);
return true; return true;
} }
case SDL_MOUSEWHEEL: case SDL_EVENT_MOUSE_WHEEL:
{ {
//IMGUI_DEBUG_LOG("wheel %.2f %.2f, precise %.2f %.2f\n", (float)event->wheel.x, (float)event->wheel.y, event->wheel.preciseX, event->wheel.preciseY); //IMGUI_DEBUG_LOG("wheel %.2f %.2f, precise %.2f %.2f\n", (float)event->wheel.x, (float)event->wheel.y, event->wheel.preciseX, event->wheel.preciseY);
#if SDL_VERSION_ATLEAST(2,0,18) // If this fails to compile on Emscripten: update to latest Emscripten! float wheel_x = -event->wheel.x;
float wheel_x = -event->wheel.preciseX; float wheel_y = event->wheel.y;
float wheel_y = event->wheel.preciseY; #ifdef __EMSCRIPTEN__
#else
float wheel_x = -(float)event->wheel.x;
float wheel_y = (float)event->wheel.y;
#endif
#ifdef __EMSCRIPTEN__
wheel_x /= 100.0f; wheel_x /= 100.0f;
#endif #endif
io.AddMouseWheelEvent(wheel_x, wheel_y); io.AddMouseWheelEvent(wheel_x, wheel_y);
return true; return true;
} }
case SDL_MOUSEBUTTONDOWN: case SDL_EVENT_MOUSE_BUTTON_DOWN:
case SDL_MOUSEBUTTONUP: case SDL_EVENT_MOUSE_BUTTON_UP:
{ {
int mouse_button = -1; int mouse_button = -1;
if (event->button.button == SDL_BUTTON_LEFT) { mouse_button = 0; } if (event->button.button == SDL_BUTTON_LEFT) { mouse_button = 0; }
@ -245,45 +237,45 @@ bool ImGui_ImplSDL3_ProcessEvent(const SDL_Event* event)
if (event->button.button == SDL_BUTTON_X2) { mouse_button = 4; } if (event->button.button == SDL_BUTTON_X2) { mouse_button = 4; }
if (mouse_button == -1) if (mouse_button == -1)
break; break;
io.AddMouseButtonEvent(mouse_button, (event->type == SDL_MOUSEBUTTONDOWN)); io.AddMouseButtonEvent(mouse_button, (event->type == SDL_EVENT_MOUSE_BUTTON_DOWN));
bd->MouseButtonsDown = (event->type == SDL_MOUSEBUTTONDOWN) ? (bd->MouseButtonsDown | (1 << mouse_button)) : (bd->MouseButtonsDown & ~(1 << mouse_button)); bd->MouseButtonsDown = (event->type == SDL_EVENT_MOUSE_BUTTON_DOWN) ? (bd->MouseButtonsDown | (1 << mouse_button)) : (bd->MouseButtonsDown & ~(1 << mouse_button));
return true; return true;
} }
case SDL_TEXTINPUT: case SDL_EVENT_TEXT_INPUT:
{ {
io.AddInputCharactersUTF8(event->text.text); io.AddInputCharactersUTF8(event->text.text);
return true; return true;
} }
case SDL_KEYDOWN: case SDL_EVENT_KEY_DOWN:
case SDL_KEYUP: case SDL_EVENT_KEY_UP:
{ {
ImGui_ImplSDL3_UpdateKeyModifiers((SDL_Keymod)event->key.keysym.mod); ImGui_ImplSDL3_UpdateKeyModifiers((SDL_Keymod)event->key.keysym.mod);
ImGuiKey key = ImGui_ImplSDL3_KeycodeToImGuiKey(event->key.keysym.sym); ImGuiKey key = ImGui_ImplSDL3_KeycodeToImGuiKey(event->key.keysym.sym);
io.AddKeyEvent(key, (event->type == SDL_KEYDOWN)); io.AddKeyEvent(key, (event->type == SDL_EVENT_KEY_DOWN));
io.SetKeyEventNativeData(key, event->key.keysym.sym, event->key.keysym.scancode, event->key.keysym.scancode); // To support legacy indexing (<1.87 user code). Legacy backend uses SDLK_*** as indices to IsKeyXXX() functions. io.SetKeyEventNativeData(key, event->key.keysym.sym, event->key.keysym.scancode, event->key.keysym.scancode); // To support legacy indexing (<1.87 user code). Legacy backend uses SDLK_*** as indices to IsKeyXXX() functions.
return true; return true;
} }
case SDL_WINDOWEVENT: case SDL_EVENT_WINDOW_MOUSE_ENTER:
{ {
// - When capturing mouse, SDL will send a bunch of conflicting LEAVE/ENTER event on every mouse move, but the final ENTER tends to be right. bd->MouseWindowID = event->window.windowID;
// - However we won't get a correct LEAVE event for a captured window. bd->PendingMouseLeaveFrame = 0;
// - In some cases, when detaching a window from main viewport SDL may send SDL_WINDOWEVENT_ENTER one frame too late,
// causing SDL_WINDOWEVENT_LEAVE on previous frame to interrupt drag operation by clear mouse position. This is why
// we delay process the SDL_WINDOWEVENT_LEAVE events by one frame. See issue #5012 for details.
Uint8 window_event = event->window.event;
if (window_event == SDL_WINDOWEVENT_ENTER)
{
bd->MouseWindowID = event->window.windowID;
bd->PendingMouseLeaveFrame = 0;
}
if (window_event == SDL_WINDOWEVENT_LEAVE)
bd->PendingMouseLeaveFrame = ImGui::GetFrameCount() + 1;
if (window_event == SDL_WINDOWEVENT_FOCUS_GAINED)
io.AddFocusEvent(true);
else if (event->window.event == SDL_WINDOWEVENT_FOCUS_LOST)
io.AddFocusEvent(false);
return true; return true;
} }
// - In some cases, when detaching a window from main viewport SDL may send SDL_WINDOWEVENT_ENTER one frame too late,
// causing SDL_WINDOWEVENT_LEAVE on previous frame to interrupt drag operation by clear mouse position. This is why
// we delay process the SDL_WINDOWEVENT_LEAVE events by one frame. See issue #5012 for details.
// FIXME: Unconfirmed whether this is still needed with SDL3.
case SDL_EVENT_WINDOW_MOUSE_LEAVE:
{
bd->PendingMouseLeaveFrame = ImGui::GetFrameCount() + 1;
return true;
}
case SDL_EVENT_WINDOW_FOCUS_GAINED:
io.AddFocusEvent(true);
return true;
case SDL_EVENT_WINDOW_FOCUS_LOST:
io.AddFocusEvent(false);
return true;
} }
return false; return false;
} }
@ -308,8 +300,8 @@ static bool ImGui_ImplSDL3_Init(SDL_Window* window, SDL_Renderer* renderer)
ImGui_ImplSDL3_Data* bd = IM_NEW(ImGui_ImplSDL3_Data)(); ImGui_ImplSDL3_Data* bd = IM_NEW(ImGui_ImplSDL3_Data)();
io.BackendPlatformUserData = (void*)bd; io.BackendPlatformUserData = (void*)bd;
io.BackendPlatformName = "imgui_impl_sdl3"; io.BackendPlatformName = "imgui_impl_sdl3";
io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional) io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used) io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
bd->Window = window; bd->Window = window;
bd->Renderer = renderer; bd->Renderer = renderer;
@ -335,8 +327,7 @@ static bool ImGui_ImplSDL3_Init(SDL_Window* window, SDL_Renderer* renderer)
ImGuiViewport* main_viewport = ImGui::GetMainViewport(); ImGuiViewport* main_viewport = ImGui::GetMainViewport();
main_viewport->PlatformHandleRaw = nullptr; main_viewport->PlatformHandleRaw = nullptr;
SDL_SysWMinfo info; SDL_SysWMinfo info;
SDL_VERSION(&info.version); if (SDL_GetWindowWMInfo(window, &info, SDL_SYSWM_CURRENT_VERSION))
if (SDL_GetWindowWMInfo(window, &info))
{ {
#if defined(SDL_VIDEO_DRIVER_WINDOWS) #if defined(SDL_VIDEO_DRIVER_WINDOWS)
main_viewport->PlatformHandleRaw = (void*)info.info.win.window; main_viewport->PlatformHandleRaw = (void*)info.info.win.window;
@ -370,9 +361,6 @@ bool ImGui_ImplSDL3_InitForOpenGL(SDL_Window* window, void* sdl_gl_context)
bool ImGui_ImplSDL3_InitForVulkan(SDL_Window* window) bool ImGui_ImplSDL3_InitForVulkan(SDL_Window* window)
{ {
#if !SDL_HAS_VULKAN
IM_ASSERT(0 && "Unsupported");
#endif
return ImGui_ImplSDL3_Init(window, nullptr); return ImGui_ImplSDL3_Init(window, nullptr);
} }
@ -403,7 +391,7 @@ void ImGui_ImplSDL3_Shutdown()
if (bd->ClipboardTextData) if (bd->ClipboardTextData)
SDL_free(bd->ClipboardTextData); SDL_free(bd->ClipboardTextData);
for (ImGuiMouseCursor cursor_n = 0; cursor_n < ImGuiMouseCursor_COUNT; cursor_n++) for (ImGuiMouseCursor cursor_n = 0; cursor_n < ImGuiMouseCursor_COUNT; cursor_n++)
SDL_FreeCursor(bd->MouseCursors[cursor_n]); SDL_DestroyCursor(bd->MouseCursors[cursor_n]);
bd->LastMouseCursor = NULL; bd->LastMouseCursor = NULL;
io.BackendPlatformName = nullptr; io.BackendPlatformName = nullptr;
@ -429,15 +417,17 @@ static void ImGui_ImplSDL3_UpdateMouseData()
{ {
// (Optional) Set OS mouse position from Dear ImGui if requested (rarely used, only when ImGuiConfigFlags_NavEnableSetMousePos is enabled by user) // (Optional) Set OS mouse position from Dear ImGui if requested (rarely used, only when ImGuiConfigFlags_NavEnableSetMousePos is enabled by user)
if (io.WantSetMousePos) if (io.WantSetMousePos)
SDL_WarpMouseInWindow(bd->Window, (int)io.MousePos.x, (int)io.MousePos.y); SDL_WarpMouseInWindow(bd->Window, io.MousePos.x, io.MousePos.y);
// (Optional) Fallback to provide mouse position when focused (SDL_MOUSEMOTION already provides this when hovered or captured) // (Optional) Fallback to provide mouse position when focused (SDL_MOUSEMOTION already provides this when hovered or captured)
if (bd->MouseCanUseGlobalState && bd->MouseButtonsDown == 0) if (bd->MouseCanUseGlobalState && bd->MouseButtonsDown == 0)
{ {
int window_x, window_y, mouse_x_global, mouse_y_global; // Single-viewport mode: mouse position in client window coordinates (io.MousePos is (0,0) when the mouse is on the upper-left corner of the app window)
float mouse_x_global, mouse_y_global;
int window_x, window_y;
SDL_GetGlobalMouseState(&mouse_x_global, &mouse_y_global); SDL_GetGlobalMouseState(&mouse_x_global, &mouse_y_global);
SDL_GetWindowPosition(bd->Window, &window_x, &window_y); SDL_GetWindowPosition(focused_window, &window_x, &window_y);
io.AddMousePosEvent((float)(mouse_x_global - window_x), (float)(mouse_y_global - window_y)); io.AddMousePosEvent(mouse_x_global - window_x, mouse_y_global - window_y);
} }
} }
} }
@ -453,7 +443,7 @@ static void ImGui_ImplSDL3_UpdateMouseCursor()
if (io.MouseDrawCursor || imgui_cursor == ImGuiMouseCursor_None) if (io.MouseDrawCursor || imgui_cursor == ImGuiMouseCursor_None)
{ {
// Hide OS mouse cursor if imgui is drawing it or if it wants no cursor // Hide OS mouse cursor if imgui is drawing it or if it wants no cursor
SDL_ShowCursor(SDL_FALSE); SDL_HideCursor();
} }
else else
{ {
@ -464,7 +454,7 @@ static void ImGui_ImplSDL3_UpdateMouseCursor()
SDL_SetCursor(expected_cursor); // SDL function doesn't have an early out (see #6113) SDL_SetCursor(expected_cursor); // SDL function doesn't have an early out (see #6113)
bd->LastMouseCursor = expected_cursor; bd->LastMouseCursor = expected_cursor;
} }
SDL_ShowCursor(SDL_TRUE); SDL_ShowCursor();
} }
} }
@ -476,40 +466,40 @@ static void ImGui_ImplSDL3_UpdateGamepads()
// Get gamepad // Get gamepad
io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad; io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad;
SDL_GameController* game_controller = SDL_GameControllerOpen(0); SDL_Gamepad* gamepad = SDL_OpenGamepad(0);
if (!game_controller) if (!gamepad)
return; return;
io.BackendFlags |= ImGuiBackendFlags_HasGamepad; io.BackendFlags |= ImGuiBackendFlags_HasGamepad;
// Update gamepad inputs // Update gamepad inputs
#define IM_SATURATE(V) (V < 0.0f ? 0.0f : V > 1.0f ? 1.0f : V) #define IM_SATURATE(V) (V < 0.0f ? 0.0f : V > 1.0f ? 1.0f : V)
#define MAP_BUTTON(KEY_NO, BUTTON_NO) { io.AddKeyEvent(KEY_NO, SDL_GameControllerGetButton(game_controller, BUTTON_NO) != 0); } #define MAP_BUTTON(KEY_NO, BUTTON_NO) { io.AddKeyEvent(KEY_NO, SDL_GetGamepadButton(gamepad, BUTTON_NO) != 0); }
#define MAP_ANALOG(KEY_NO, AXIS_NO, V0, V1) { float vn = (float)(SDL_GameControllerGetAxis(game_controller, AXIS_NO) - V0) / (float)(V1 - V0); vn = IM_SATURATE(vn); io.AddKeyAnalogEvent(KEY_NO, vn > 0.1f, vn); } #define MAP_ANALOG(KEY_NO, AXIS_NO, V0, V1) { float vn = (float)(SDL_GetGamepadAxis(gamepad, AXIS_NO) - V0) / (float)(V1 - V0); vn = IM_SATURATE(vn); io.AddKeyAnalogEvent(KEY_NO, vn > 0.1f, vn); }
const int thumb_dead_zone = 8000; // SDL_gamecontroller.h suggests using this value. const int thumb_dead_zone = 8000; // SDL_gamecontroller.h suggests using this value.
MAP_BUTTON(ImGuiKey_GamepadStart, SDL_CONTROLLER_BUTTON_START); MAP_BUTTON(ImGuiKey_GamepadStart, SDL_GAMEPAD_BUTTON_START);
MAP_BUTTON(ImGuiKey_GamepadBack, SDL_CONTROLLER_BUTTON_BACK); MAP_BUTTON(ImGuiKey_GamepadBack, SDL_GAMEPAD_BUTTON_BACK);
MAP_BUTTON(ImGuiKey_GamepadFaceLeft, SDL_CONTROLLER_BUTTON_X); // Xbox X, PS Square MAP_BUTTON(ImGuiKey_GamepadFaceLeft, SDL_GAMEPAD_BUTTON_X); // Xbox X, PS Square
MAP_BUTTON(ImGuiKey_GamepadFaceRight, SDL_CONTROLLER_BUTTON_B); // Xbox B, PS Circle MAP_BUTTON(ImGuiKey_GamepadFaceRight, SDL_GAMEPAD_BUTTON_B); // Xbox B, PS Circle
MAP_BUTTON(ImGuiKey_GamepadFaceUp, SDL_CONTROLLER_BUTTON_Y); // Xbox Y, PS Triangle MAP_BUTTON(ImGuiKey_GamepadFaceUp, SDL_GAMEPAD_BUTTON_Y); // Xbox Y, PS Triangle
MAP_BUTTON(ImGuiKey_GamepadFaceDown, SDL_CONTROLLER_BUTTON_A); // Xbox A, PS Cross MAP_BUTTON(ImGuiKey_GamepadFaceDown, SDL_GAMEPAD_BUTTON_A); // Xbox A, PS Cross
MAP_BUTTON(ImGuiKey_GamepadDpadLeft, SDL_CONTROLLER_BUTTON_DPAD_LEFT); MAP_BUTTON(ImGuiKey_GamepadDpadLeft, SDL_GAMEPAD_BUTTON_DPAD_LEFT);
MAP_BUTTON(ImGuiKey_GamepadDpadRight, SDL_CONTROLLER_BUTTON_DPAD_RIGHT); MAP_BUTTON(ImGuiKey_GamepadDpadRight, SDL_GAMEPAD_BUTTON_DPAD_RIGHT);
MAP_BUTTON(ImGuiKey_GamepadDpadUp, SDL_CONTROLLER_BUTTON_DPAD_UP); MAP_BUTTON(ImGuiKey_GamepadDpadUp, SDL_GAMEPAD_BUTTON_DPAD_UP);
MAP_BUTTON(ImGuiKey_GamepadDpadDown, SDL_CONTROLLER_BUTTON_DPAD_DOWN); MAP_BUTTON(ImGuiKey_GamepadDpadDown, SDL_GAMEPAD_BUTTON_DPAD_DOWN);
MAP_BUTTON(ImGuiKey_GamepadL1, SDL_CONTROLLER_BUTTON_LEFTSHOULDER); MAP_BUTTON(ImGuiKey_GamepadL1, SDL_GAMEPAD_BUTTON_LEFT_SHOULDER);
MAP_BUTTON(ImGuiKey_GamepadR1, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER); MAP_BUTTON(ImGuiKey_GamepadR1, SDL_GAMEPAD_BUTTON_RIGHT_SHOULDER);
MAP_ANALOG(ImGuiKey_GamepadL2, SDL_CONTROLLER_AXIS_TRIGGERLEFT, 0.0f, 32767); MAP_ANALOG(ImGuiKey_GamepadL2, SDL_GAMEPAD_AXIS_LEFT_TRIGGER, 0.0f, 32767);
MAP_ANALOG(ImGuiKey_GamepadR2, SDL_CONTROLLER_AXIS_TRIGGERRIGHT, 0.0f, 32767); MAP_ANALOG(ImGuiKey_GamepadR2, SDL_GAMEPAD_AXIS_RIGHT_TRIGGER, 0.0f, 32767);
MAP_BUTTON(ImGuiKey_GamepadL3, SDL_CONTROLLER_BUTTON_LEFTSTICK); MAP_BUTTON(ImGuiKey_GamepadL3, SDL_GAMEPAD_BUTTON_LEFT_STICK);
MAP_BUTTON(ImGuiKey_GamepadR3, SDL_CONTROLLER_BUTTON_RIGHTSTICK); MAP_BUTTON(ImGuiKey_GamepadR3, SDL_GAMEPAD_BUTTON_RIGHT_STICK);
MAP_ANALOG(ImGuiKey_GamepadLStickLeft, SDL_CONTROLLER_AXIS_LEFTX, -thumb_dead_zone, -32768); MAP_ANALOG(ImGuiKey_GamepadLStickLeft, SDL_GAMEPAD_AXIS_LEFTX, -thumb_dead_zone, -32768);
MAP_ANALOG(ImGuiKey_GamepadLStickRight, SDL_CONTROLLER_AXIS_LEFTX, +thumb_dead_zone, +32767); MAP_ANALOG(ImGuiKey_GamepadLStickRight, SDL_GAMEPAD_AXIS_LEFTX, +thumb_dead_zone, +32767);
MAP_ANALOG(ImGuiKey_GamepadLStickUp, SDL_CONTROLLER_AXIS_LEFTY, -thumb_dead_zone, -32768); MAP_ANALOG(ImGuiKey_GamepadLStickUp, SDL_GAMEPAD_AXIS_LEFTY, -thumb_dead_zone, -32768);
MAP_ANALOG(ImGuiKey_GamepadLStickDown, SDL_CONTROLLER_AXIS_LEFTY, +thumb_dead_zone, +32767); MAP_ANALOG(ImGuiKey_GamepadLStickDown, SDL_GAMEPAD_AXIS_LEFTY, +thumb_dead_zone, +32767);
MAP_ANALOG(ImGuiKey_GamepadRStickLeft, SDL_CONTROLLER_AXIS_RIGHTX, -thumb_dead_zone, -32768); MAP_ANALOG(ImGuiKey_GamepadRStickLeft, SDL_GAMEPAD_AXIS_RIGHTX, -thumb_dead_zone, -32768);
MAP_ANALOG(ImGuiKey_GamepadRStickRight, SDL_CONTROLLER_AXIS_RIGHTX, +thumb_dead_zone, +32767); MAP_ANALOG(ImGuiKey_GamepadRStickRight, SDL_GAMEPAD_AXIS_RIGHTX, +thumb_dead_zone, +32767);
MAP_ANALOG(ImGuiKey_GamepadRStickUp, SDL_CONTROLLER_AXIS_RIGHTY, -thumb_dead_zone, -32768); MAP_ANALOG(ImGuiKey_GamepadRStickUp, SDL_GAMEPAD_AXIS_RIGHTY, -thumb_dead_zone, -32768);
MAP_ANALOG(ImGuiKey_GamepadRStickDown, SDL_CONTROLLER_AXIS_RIGHTY, +thumb_dead_zone, +32767); MAP_ANALOG(ImGuiKey_GamepadRStickDown, SDL_GAMEPAD_AXIS_RIGHTY, +thumb_dead_zone, +32767);
#undef MAP_BUTTON #undef MAP_BUTTON
#undef MAP_ANALOG #undef MAP_ANALOG
} }
@ -526,10 +516,7 @@ void ImGui_ImplSDL3_NewFrame()
SDL_GetWindowSize(bd->Window, &w, &h); SDL_GetWindowSize(bd->Window, &w, &h);
if (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_MINIMIZED) if (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_MINIMIZED)
w = h = 0; w = h = 0;
if (bd->Renderer != nullptr) SDL_GetWindowSizeInPixels(bd->Window, &display_w, &display_h);
SDL_GetRendererOutputSize(bd->Renderer, &display_w, &display_h);
else
SDL_GL_GetDrawableSize(bd->Window, &display_w, &display_h);
io.DisplaySize = ImVec2((float)w, (float)h); io.DisplaySize = ImVec2((float)w, (float)h);
if (w > 0 && h > 0) if (w > 0 && h > 0)
io.DisplayFramebufferScale = ImVec2((float)display_w / w, (float)display_h / h); io.DisplayFramebufferScale = ImVec2((float)display_w / w, (float)display_h / h);

9
backends/imgui_impl_sdl3.h
View File

@ -1,14 +1,13 @@
// dear imgui: Platform Backend for SDL3 // dear imgui: Platform Backend for SDL3 (*EXPERIMENTAL*)
// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..) // This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
// (Info: SDL3 is a cross-platform general purpose library for handling windows, inputs, graphics context creation, etc.) // (Info: SDL3 is a cross-platform general purpose library for handling windows, inputs, graphics context creation, etc.)
// (IMPORTANT: SDL 3.0.0 is NOT YET RELEASED. IT IS POSSIBLE THAT ITS SPECS/API WILL CHANGE BEFORE RELEASE)
// Implemented features: // Implemented features:
// [X] Platform: Clipboard support. // [X] Platform: Clipboard support.
// [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy SDL_SCANCODE_* values will also be supported unless IMGUI_DISABLE_OBSOLETE_KEYIO is set] // [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy SDL_SCANCODE_* values will also be supported unless IMGUI_DISABLE_OBSOLETE_KEYIO is set]
// [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'. // [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. // [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
// Missing features:
// [ ] Platform: SDL3 handling of IME under Windows appears to be broken and it explicitly disable the regular Windows IME. You can restore Windows IME by compiling SDL with SDL_DISABLE_WINDOWS_IME.
// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this. // You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need. // Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
@ -30,7 +29,3 @@ IMGUI_IMPL_API bool ImGui_ImplSDL3_InitForSDLRenderer(SDL_Window* window, SD
IMGUI_IMPL_API void ImGui_ImplSDL3_Shutdown(); IMGUI_IMPL_API void ImGui_ImplSDL3_Shutdown();
IMGUI_IMPL_API void ImGui_ImplSDL3_NewFrame(); IMGUI_IMPL_API void ImGui_ImplSDL3_NewFrame();
IMGUI_IMPL_API bool ImGui_ImplSDL3_ProcessEvent(const SDL_Event* event); IMGUI_IMPL_API bool ImGui_ImplSDL3_ProcessEvent(const SDL_Event* event);
#ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
static inline void ImGui_ImplSDL3_NewFrame(SDL_Window*) { ImGui_ImplSDL3_NewFrame(); } // 1.84: removed unnecessary parameter
#endif

1
docs/BACKENDS.md
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@ -63,6 +63,7 @@ List of Platforms Backends:
imgui_impl_glfw.cpp ; GLFW (Windows, macOS, Linux, etc.) http://www.glfw.org/ imgui_impl_glfw.cpp ; GLFW (Windows, macOS, Linux, etc.) http://www.glfw.org/
imgui_impl_osx.mm ; macOS native API (not as feature complete as glfw/sdl backends) imgui_impl_osx.mm ; macOS native API (not as feature complete as glfw/sdl backends)
imgui_impl_sdl2.cpp ; SDL2 (Windows, macOS, Linux, iOS, Android) https://www.libsdl.org imgui_impl_sdl2.cpp ; SDL2 (Windows, macOS, Linux, iOS, Android) https://www.libsdl.org
imgui_impl_sdl3.cpp ; SDL2 (Windows, macOS, Linux, iOS, Android) https://www.libsdl.org (*EXPERIMENTAL*)
imgui_impl_win32.cpp ; Win32 native API (Windows) imgui_impl_win32.cpp ; Win32 native API (Windows)
imgui_impl_glut.cpp ; GLUT/FreeGLUT (this is prehistoric software and absolutely not recommended today!) imgui_impl_glut.cpp ; GLUT/FreeGLUT (this is prehistoric software and absolutely not recommended today!)

5
docs/CHANGELOG.txt
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@ -98,6 +98,10 @@ All changes:
for smooth scrolling as reported by SDL. (#4019, #6096) for smooth scrolling as reported by SDL. (#4019, #6096)
- Backends: SDL2: Avoid calling SDL_SetCursor() when cursor has not changed, as the function - Backends: SDL2: Avoid calling SDL_SetCursor() when cursor has not changed, as the function
is surprisingly costly on Mac with latest SDL (may be fixed in next SDL version). (#6113) is surprisingly costly on Mac with latest SDL (may be fixed in next SDL version). (#6113)
- Backends: SDL3: Added experimental imgui_impl_sdl3.cpp backend. (#6146) [@dovker, @ocornut]
SDL 3.0.0 has not yet been released, so it is possible that its specs/api will change before
release. This backend is provided as a convenience for early adopters etc. We don't recommend
switching to SDL3 before it is released.
- Backends: GLFW: Registering custom low-level mouse wheel handler to get more accurate - Backends: GLFW: Registering custom low-level mouse wheel handler to get more accurate
scrolling impulses on Emscripten. (#4019, #6096) [@ocornut, @wolfpld, @tolopolarity] scrolling impulses on Emscripten. (#4019, #6096) [@ocornut, @wolfpld, @tolopolarity]
- Backends: GLFW: Added ImGui_ImplGlfw_SetCallbacksChainForAllWindows() to instruct backend - Backends: GLFW: Added ImGui_ImplGlfw_SetCallbacksChainForAllWindows() to instruct backend
@ -108,6 +112,7 @@ All changes:
- Examples: refactored SDL2+GL and GLFW+GL examples to compile with Emscripten. - Examples: refactored SDL2+GL and GLFW+GL examples to compile with Emscripten.
(#2492, #2494, #3699, #3705) [@ocornut, @nicolasnoble] (#2492, #2494, #3699, #3705) [@ocornut, @nicolasnoble]
The dedicated example_emscripten_opengl3/ has been removed. The dedicated example_emscripten_opengl3/ has been removed.
- Examples: Added SDL3+GL experimental example. (#6146)
- Examples: Win32: Fixed examples using RegisterClassW() since 1.89 to also call - Examples: Win32: Fixed examples using RegisterClassW() since 1.89 to also call
DefWindowProcW() instead of DefWindowProc() so that title text are correctly converted DefWindowProcW() instead of DefWindowProc() so that title text are correctly converted
when application is compiled without /DUNICODE. (#5725, #5961, #5975) [@markreidvfx] when application is compiled without /DUNICODE. (#5725, #5961, #5975) [@markreidvfx]

84
examples/example_sdl3_opengl3/Makefile Normal file
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@ -0,0 +1,84 @@
#
# Cross Platform Makefile
# Compatible with MSYS2/MINGW, Ubuntu 14.04.1 and Mac OS X
#
# You will need SDL3 (http://www.libsdl.org) which is still unreleased/unpackaged.
#CXX = g++
#CXX = clang++
EXE = example_sdl3_opengl3
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
SOURCES += $(IMGUI_DIR)/backends/imgui_impl_sdl3.cpp $(IMGUI_DIR)/backends/imgui_impl_opengl3.cpp
OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
UNAME_S := $(shell uname -s)
LINUX_GL_LIBS = -lGL
CXXFLAGS = -std=c++11 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
CXXFLAGS += -g -Wall -Wformat
LIBS =
##---------------------------------------------------------------------
## OPENGL ES
##---------------------------------------------------------------------
## This assumes a GL ES library available in the system, e.g. libGLESv2.so
# CXXFLAGS += -DIMGUI_IMPL_OPENGL_ES2
# LINUX_GL_LIBS = -lGLESv2
## If you're on a Raspberry Pi and want to use the legacy drivers,
## use the following instead:
# LINUX_GL_LIBS = -L/opt/vc/lib -lbrcmGLESv2
##---------------------------------------------------------------------
## BUILD FLAGS PER PLATFORM
##---------------------------------------------------------------------
ifeq ($(UNAME_S), Linux) #LINUX
ECHO_MESSAGE = "Linux"
LIBS += $(LINUX_GL_LIBS) -ldl `sdl3-config --libs`
CXXFLAGS += `sdl3-config --cflags`
CFLAGS = $(CXXFLAGS)
endif
ifeq ($(UNAME_S), Darwin) #APPLE
ECHO_MESSAGE = "Mac OS X"
LIBS += -framework OpenGL -framework Cocoa -framework IOKit -framework CoreVideo `sdl3-config --libs`
LIBS += -L/usr/local/lib -L/opt/local/lib
CXXFLAGS += `sdl3-config --cflags`
CXXFLAGS += -I/usr/local/include -I/opt/local/include
CFLAGS = $(CXXFLAGS)
endif
ifeq ($(OS), Windows_NT)
ECHO_MESSAGE = "MinGW"
LIBS += -lgdi32 -lopengl32 -limm32 `pkg-config --static --libs sdl3`
CXXFLAGS += `pkg-config --cflags sdl3`
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 $@ $<
all: $(EXE)
@echo Build complete for $(ECHO_MESSAGE)
$(EXE): $(OBJS)
$(CXX) -o $@ $^ $(CXXFLAGS) $(LIBS)
clean:
rm -f $(EXE) $(OBJS)

92
examples/example_sdl3_opengl3/Makefile.emscripten Normal file
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@ -0,0 +1,92 @@
#
# Makefile to use with SDL+emscripten
# See https://emscripten.org/docs/getting_started/downloads.html
# for installation instructions.
#
# This Makefile assumes you have loaded emscripten's environment.
# (On Windows, you may need to execute emsdk_env.bat or encmdprompt.bat ahead)
#
# Running `make -f Makefile.emscripten` will produce three files:
# - web/index.html
# - web/index.js
# - web/index.wasm
#
# All three are needed to run the demo.
CC = emcc
CXX = em++
WEB_DIR = web
EXE = $(WEB_DIR)/index.html
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
SOURCES += $(IMGUI_DIR)/backends/imgui_impl_sdl3.cpp $(IMGUI_DIR)/backends/imgui_impl_opengl3.cpp
OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
UNAME_S := $(shell uname -s)
CPPFLAGS =
LDFLAGS =
EMS =
##---------------------------------------------------------------------
## EMSCRIPTEN OPTIONS
##---------------------------------------------------------------------
# ("EMS" options gets added to both CPPFLAGS and LDFLAGS, whereas some options are for linker only)
EMS += -s USE_SDL=2
EMS += -s DISABLE_EXCEPTION_CATCHING=1
LDFLAGS += -s WASM=1 -s ALLOW_MEMORY_GROWTH=1 -s NO_EXIT_RUNTIME=0 -s ASSERTIONS=1
# Uncomment next line to fix possible rendering bugs with Emscripten version older then 1.39.0 (https://github.com/ocornut/imgui/issues/2877)
#EMS += -s BINARYEN_TRAP_MODE=clamp
#EMS += -s SAFE_HEAP=1 ## Adds overhead
# Emscripten allows preloading a file or folder to be accessible at runtime.
# The Makefile for this example project suggests embedding the misc/fonts/ folder into our application, it will then be accessible as "/fonts"
# See documentation for more details: https://emscripten.org/docs/porting/files/packaging_files.html
# (Default value is 0. Set to 1 to enable file-system and include the misc/fonts/ folder as part of the build.)
USE_FILE_SYSTEM ?= 0
ifeq ($(USE_FILE_SYSTEM), 0)
LDFLAGS += -s NO_FILESYSTEM=1
CPPFLAGS += -DIMGUI_DISABLE_FILE_FUNCTIONS
endif
ifeq ($(USE_FILE_SYSTEM), 1)
LDFLAGS += --no-heap-copy --preload-file ../../misc/fonts@/fonts
endif
##---------------------------------------------------------------------
## FINAL BUILD FLAGS
##---------------------------------------------------------------------
CPPFLAGS += -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
#CPPFLAGS += -g
CPPFLAGS += -Wall -Wformat -Os $(EMS)
LDFLAGS += --shell-file ../libs/emscripten/shell_minimal.html
LDFLAGS += $(EMS)
##---------------------------------------------------------------------
## BUILD RULES
##---------------------------------------------------------------------
%.o:%.cpp
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $<
%.o:$(IMGUI_DIR)/%.cpp
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $<
%.o:$(IMGUI_DIR)/backends/%.cpp
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c -o $@ $<
all: $(EXE)
@echo Build complete for $(EXE)
$(WEB_DIR):
mkdir $@
serve: all
python3 -m http.server -d $(WEB_DIR)
$(EXE): $(OBJS) $(WEB_DIR)
$(CXX) -o $@ $(OBJS) $(LDFLAGS)
clean:
rm -rf $(OBJS) $(WEB_DIR)

57
examples/example_sdl3_opengl3/README.md Normal file
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@ -0,0 +1,57 @@
# How to Build
## Windows with Visual Studio's IDE
Use the provided project file (.vcxproj). Add to solution (imgui_examples.sln) if necessary.
## Windows with Visual Studio's CLI
Use build_win32.bat or directly:
```
set SDL2_DIR=path_to_your_sdl3_folder
cl /Zi /MD /I.. /I..\.. /I%SDL2_DIR%\include main.cpp ..\..\backends\imgui_impl_sdl3.cpp ..\..\backends\imgui_impl_opengl3.cpp ..\..\imgui*.cpp /FeDebug/example_sdl3_opengl3.exe /FoDebug/ /link /libpath:%SDL2_DIR%\lib\x86 SDL3.lib opengl32.lib /subsystem:console
# ^^ include paths ^^ source files ^^ output exe ^^ output dir ^^ libraries
# or for 64-bit:
cl /Zi /MD /I.. /I..\.. /I%SDL2_DIR%\include main.cpp ..\..\backends\imgui_impl_sdl3.cpp ..\..\backends\imgui_impl_opengl3.cpp ..\..\imgui*.cpp /FeDebug/example_sdl3_opengl3.exe /FoDebug/ /link /libpath:%SDL2_DIR%\lib\x64 SDL3.lib SDL2mainopengl32.lib /subsystem:console
```
## Linux and similar Unixes
Use our Makefile or directly:
```
c++ `sdl3-config --cflags` -I .. -I ../.. -I ../../backends
main.cpp ../../backends/imgui_impl_sdl3.cpp ../../backends/imgui_impl_opengl3.cpp ../../imgui*.cpp
`sdl3-config --libs` -lGL -ldl
```
## macOS
Use our Makefile or directly:
```
brew install sdl3
c++ `sdl3-config --cflags` -I .. -I ../.. -I ../../backends
main.cpp ../../backends/imgui_impl_sdl3.cpp ../../backends/imgui_impl_opengl3.cpp ../../imgui*.cpp
`sdl3-config --libs` -framework OpenGl -framework CoreFoundation
```
## Emscripten
**Building**
You need to install Emscripten from https://emscripten.org/docs/getting_started/downloads.html, and have the environment variables set, as described in https://emscripten.org/docs/getting_started/downloads.html#installation-instructions
- Depending on your configuration, in Windows you may need to run `emsdk/emsdk_env.bat` in your console to access the Emscripten command-line tools.
- You may also refer to our [Continuous Integration setup](https://github.com/ocornut/imgui/tree/master/.github/workflows) for Emscripten setup.
- Then build using `make -f Makefile.emscripten` while in the current directory.
**Running an Emscripten project**
To run on a local machine:
- `make -f Makefile.emscripten serve` will use Python3 to spawn a local webserver, you can then browse http://localhost:8000 to access your build.
- Otherwise, generally you will need a local webserver. Quoting [https://emscripten.org/docs/getting_started](https://emscripten.org/docs/getting_started/Tutorial.html#generating-html):<br>
_"Unfortunately several browsers (including Chrome, Safari, and Internet Explorer) do not support file:// [XHR](https://emscripten.org/docs/site/glossary.html#term-xhr) requests, and can’t load extra files needed by the HTML (like a .wasm file, or packaged file data as mentioned lower down). For these browsers you’ll need to serve the files using a [local webserver](https://emscripten.org/docs/getting_started/FAQ.html#faq-local-webserver) and then open http://localhost:8000/hello.html."_
- Emscripten SDK has a handy `emrun` command: `emrun web/index.html --browser firefox` which will spawn a temporary local webserver (in Firefox). See https://emscripten.org/docs/compiling/Running-html-files-with-emrun.html for details.
- You may use Python 3 builtin webserver: `python -m http.server -d web` (this is what `make serve` uses).
- You may use Python 2 builtin webserver: `cd web && python -m SimpleHTTPServer`.
- If you are accessing the files over a network, certain browsers, such as Firefox, will restrict Gamepad API access to secure contexts only (e.g. https only).

8
examples/example_sdl3_opengl3/build_win32.bat Normal file
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@ -0,0 +1,8 @@
@REM Build for Visual Studio compiler. Run your copy of vcvars32.bat or vcvarsall.bat to setup command-line compiler.
@set OUT_DIR=Debug
@set OUT_EXE=example_sdl3_opengl3
@set INCLUDES=/I..\.. /I..\..\backends /I%SDL3_DIR%\include
@set SOURCES=main.cpp ..\..\backends\imgui_impl_sdl3.cpp ..\..\backends\imgui_impl_opengl3.cpp ..\..\imgui*.cpp
@set LIBS=/LIBPATH:%SDL3_DIR%\lib\x86 SDL3.lib opengl32.lib shell32.lib
mkdir %OUT_DIR%
cl /nologo /Zi /MD %INCLUDES% %SOURCES% /Fe%OUT_DIR%/%OUT_EXE%.exe /Fo%OUT_DIR%/ /link %LIBS% /subsystem:console

182
examples/example_sdl3_opengl3/example_sdl3_opengl3.vcxproj Normal file
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@ -0,0 +1,182 @@
<?xml version="1.0" encoding="utf-8"?>
<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup Label="ProjectConfigurations">
<ProjectConfiguration Include="Debug|Win32">
<Configuration>Debug</Configuration>
<Platform>Win32</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Debug|x64">
<Configuration>Debug</Configuration>
<Platform>x64</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Release|Win32">
<Configuration>Release</Configuration>
<Platform>Win32</Platform>
</ProjectConfiguration>
<ProjectConfiguration Include="Release|x64">
<Configuration>Release</Configuration>
<Platform>x64</Platform>
</ProjectConfiguration>
</ItemGroup>
<PropertyGroup Label="Globals">
<ProjectGuid>{84AAA301-84FE-428B-9E3E-817BC8123C0C}</ProjectGuid>
<RootNamespace>example_sdl3_opengl3</RootNamespace>
<WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
</PropertyGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>true</UseDebugLibraries>
<CharacterSet>MultiByte</CharacterSet>
<PlatformToolset>v140</PlatformToolset>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>true</UseDebugLibraries>
<CharacterSet>MultiByte</CharacterSet>
<PlatformToolset>v140</PlatformToolset>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
<ConfigurationType>Application</ConfigurationType>
<UseDebugLibraries>false</UseDebugLibraries>
<WholeProgramOptimization>true</WholeProgramOptimization>
<CharacterSet>MultiByte</CharacterSet>
<PlatformToolset>v140</PlatformToolset>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
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<UseDebugLibraries>false</UseDebugLibraries>
<WholeProgramOptimization>true</WholeProgramOptimization>
<CharacterSet>MultiByte</CharacterSet>
<PlatformToolset>v140</PlatformToolset>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
<ImportGroup Label="ExtensionSettings">
</ImportGroup>
<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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<ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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<WarningLevel>Level4</WarningLevel>
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<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
<AdditionalLibraryDirectories>%SDL3_DIR%\lib\x86;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
<AdditionalDependencies>opengl32.lib;SDL3.lib;%(AdditionalDependencies)</AdditionalDependencies>
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<Link>
<GenerateDebugInformation>true</GenerateDebugInformation>
<AdditionalLibraryDirectories>%SDL3_DIR%\lib\x64;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
<AdditionalDependencies>opengl32.lib;SDL3.lib;%(AdditionalDependencies)</AdditionalDependencies>
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<GenerateDebugInformation>true</GenerateDebugInformation>
<EnableCOMDATFolding>true</EnableCOMDATFolding>
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<ClInclude Include="..\..\imgui.h" />
<ClInclude Include="..\..\imgui_internal.h" />
<ClInclude Include="..\..\backends\imgui_impl_sdl3.h" />
<ClInclude Include="..\..\backends\imgui_impl_opengl3.h" />
<ClInclude Include="..\..\backends\imgui_impl_opengl3_loader.h" />
</ItemGroup>
<ItemGroup>
<None Include="..\..\misc\debuggers\imgui.natvis" />
<None Include="..\README.txt" />
</ItemGroup>
<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
<ImportGroup Label="ExtensionTargets">
</ImportGroup>
</Project>

64
examples/example_sdl3_opengl3/example_sdl3_opengl3.vcxproj.filters Normal file
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@ -0,0 +1,64 @@
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup>
<Filter Include="imgui">
<UniqueIdentifier>{20b90ce4-7fcb-4731-b9a0-075f875de82d}</UniqueIdentifier>
</Filter>
<Filter Include="sources">
<UniqueIdentifier>{f18ab499-84e1-499f-8eff-9754361e0e52}</UniqueIdentifier>
<Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
</Filter>
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\..\imgui.cpp">
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="..\..\imgui_demo.cpp">
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="..\..\imgui_draw.cpp">
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="main.cpp">
<Filter>sources</Filter>
</ClCompile>
<ClCompile Include="..\..\backends\imgui_impl_sdl3.cpp">
<Filter>sources</Filter>
</ClCompile>
<ClCompile Include="..\..\backends\imgui_impl_opengl3.cpp">
<Filter>sources</Filter>
</ClCompile>
<ClCompile Include="..\..\imgui_tables.cpp">
<Filter>imgui</Filter>
</ClCompile>
<ClCompile Include="..\..\imgui_widgets.cpp">
<Filter>imgui</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="..\..\imconfig.h">
<Filter>imgui</Filter>
</ClInclude>
<ClInclude Include="..\..\imgui.h">
<Filter>imgui</Filter>
</ClInclude>
<ClInclude Include="..\..\imgui_internal.h">
<Filter>imgui</Filter>
</ClInclude>
<ClInclude Include="..\..\backends\imgui_impl_sdl3.h">
<Filter>sources</Filter>
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<ClInclude Include="..\..\backends\imgui_impl_opengl3.h">
<Filter>sources</Filter>
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<ClInclude Include="..\..\backends\imgui_impl_opengl3_loader.h">
<Filter>sources</Filter>
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<None Include="..\README.txt" />
<None Include="..\..\misc\debuggers\imgui.natvis">
<Filter>imgui</Filter>
</None>
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</Project>

193
examples/example_sdl3_opengl3/main.cpp Normal file
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@ -0,0 +1,193 @@
// Dear ImGui: standalone example application for SDL3 + OpenGL
// (SDL is a cross-platform general purpose library for handling windows, inputs, OpenGL/Vulkan/Metal graphics context creation, etc.)
// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
// Read online: https://github.com/ocornut/imgui/tree/master/docs
#include "imgui.h"
#include "imgui_impl_sdl3.h"
#include "imgui_impl_opengl3.h"
#include <stdio.h>
#include <SDL3/SDL.h>
#if defined(IMGUI_IMPL_OPENGL_ES2)
#include <SDL3/SDL_opengles2.h>
#else
#include <SDL3/SDL_opengl.h>
#endif
// This example can also compile and run with Emscripten! See 'Makefile.emscripten' for details.
#ifdef __EMSCRIPTEN__
#include "../libs/emscripten/emscripten_mainloop_stub.h"
#endif
// Main code
int main(int, char**)
{
// Setup SDL
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_GAMEPAD) != 0)
{
printf("Error: %s\n", SDL_GetError());
return -1;
}
// Decide GL+GLSL versions
#if defined(IMGUI_IMPL_OPENGL_ES2)
// GL ES 2.0 + GLSL 100
const char* glsl_version = "#version 100";
SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
#elif defined(__APPLE__)
// GL 3.2 Core + GLSL 150
const char* glsl_version = "#version 150";
SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG); // Always required on Mac
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
#else
// GL 3.0 + GLSL 130
const char* glsl_version = "#version 130";
SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
#endif
// Create window with graphics context
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL3+OpenGL3 example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, window_flags);
SDL_GLContext gl_context = SDL_GL_CreateContext(window);
SDL_GL_MakeCurrent(window, gl_context);
SDL_GL_SetSwapInterval(1); // Enable vsync
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
//io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
//io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
// Setup Dear ImGui style
ImGui::StyleColorsDark();
//ImGui::StyleColorsLight();
// Setup Platform/Renderer backends
ImGui_ImplSDL3_InitForOpenGL(window, gl_context);
ImGui_ImplOpenGL3_Init(glsl_version);
// 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 \\ !
// - Our Emscripten build process allows embedding fonts to be accessible at runtime from the "fonts/" folder. See Makefile.emscripten for details.
//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);
// 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;
#ifdef __EMSCRIPTEN__
// For an Emscripten build we are disabling file-system access, so let's not attempt to do a fopen() of the imgui.ini file.
// You may manually call LoadIniSettingsFromMemory() to load settings from your own storage.
io.IniFilename = NULL;
EMSCRIPTEN_MAINLOOP_BEGIN
#else
while (!done)
#endif
{
// 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_Event event;
while (SDL_PollEvent(&event))
{
ImGui_ImplSDL3_ProcessEvent(&event);
if (event.type == SDL_EVENT_QUIT)
done = true;
if (event.type == SDL_EVENT_WINDOW_CLOSE_REQUESTED && event.window.windowID == SDL_GetWindowID(window))
done = true;
}
// Start the Dear ImGui frame
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplSDL3_NewFrame();
ImGui::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);
// 2. Show a simple window that we create ourselves. We use a Begin/End pair to create a named window.
{
static float f = 0.0f;
static int counter = 0;
ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it.
ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too)
ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state
ImGui::Checkbox("Another Window", &show_another_window);
ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated)
counter++;
ImGui::SameLine();
ImGui::Text("counter = %d", counter);
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
ImGui::End();
}
// 3. Show another simple window.
if (show_another_window)
{
ImGui::Begin("Another Window", &show_another_window); // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked)
ImGui::Text("Hello from another window!");
if (ImGui::Button("Close Me"))
show_another_window = false;
ImGui::End();
}
// Rendering
ImGui::Render();
glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y);
glClearColor(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w);
glClear(GL_COLOR_BUFFER_BIT);
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
SDL_GL_SwapWindow(window);
}
#ifdef __EMSCRIPTEN__
EMSCRIPTEN_MAINLOOP_END;
#endif
// Cleanup
ImGui_ImplOpenGL3_Shutdown();
ImGui_ImplSDL3_Shutdown();
ImGui::DestroyContext();
SDL_GL_DeleteContext(gl_context);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}

10
examples/imgui_examples.sln
View File

@ -27,6 +27,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "example_sdl2_sdlrenderer",
EndProject EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "example_sdl2_vulkan", "example_sdl2_vulkan\example_sdl2_vulkan.vcxproj", "{BAE3D0B5-9695-4EB1-AD0F-75890EB4A3B3}" Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "example_sdl2_vulkan", "example_sdl2_vulkan\example_sdl2_vulkan.vcxproj", "{BAE3D0B5-9695-4EB1-AD0F-75890EB4A3B3}"
EndProject EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "example_sdl3_opengl3", "example_sdl3_opengl3\example_sdl3_opengl3.vcxproj", "{84AAA301-84FE-428B-9E3E-817BC8123C0C}"
EndProject
Global Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Win32 = Debug|Win32 Debug|Win32 = Debug|Win32
@ -131,6 +133,14 @@ Global
{BAE3D0B5-9695-4EB1-AD0F-75890EB4A3B3}.Release|Win32.Build.0 = Release|Win32 {BAE3D0B5-9695-4EB1-AD0F-75890EB4A3B3}.Release|Win32.Build.0 = Release|Win32
{BAE3D0B5-9695-4EB1-AD0F-75890EB4A3B3}.Release|x64.ActiveCfg = Release|x64 {BAE3D0B5-9695-4EB1-AD0F-75890EB4A3B3}.Release|x64.ActiveCfg = Release|x64
{BAE3D0B5-9695-4EB1-AD0F-75890EB4A3B3}.Release|x64.Build.0 = Release|x64 {BAE3D0B5-9695-4EB1-AD0F-75890EB4A3B3}.Release|x64.Build.0 = Release|x64
{84AAA301-84FE-428B-9E3E-817BC8123C0C}.Debug|Win32.ActiveCfg = Debug|Win32
{84AAA301-84FE-428B-9E3E-817BC8123C0C}.Debug|Win32.Build.0 = Debug|Win32
{84AAA301-84FE-428B-9E3E-817BC8123C0C}.Debug|x64.ActiveCfg = Debug|x64
{84AAA301-84FE-428B-9E3E-817BC8123C0C}.Debug|x64.Build.0 = Debug|x64
{84AAA301-84FE-428B-9E3E-817BC8123C0C}.Release|Win32.ActiveCfg = Release|Win32
{84AAA301-84FE-428B-9E3E-817BC8123C0C}.Release|Win32.Build.0 = Release|Win32
{84AAA301-84FE-428B-9E3E-817BC8123C0C}.Release|x64.ActiveCfg = Release|x64
{84AAA301-84FE-428B-9E3E-817BC8123C0C}.Release|x64.Build.0 = Release|x64
EndGlobalSection EndGlobalSection
GlobalSection(SolutionProperties) = preSolution GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE HideSolutionNode = FALSE