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latest ImGui

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Signed-off-by: Peter Siegmund <developer@mars3142.org>
This commit is contained in:
Peter Siegmund
2025-06-15 22:28:39 +02:00
parent 11c459bad8
commit 6cf56ba468
13 changed files with 4930 additions and 1840 deletions
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91
components/imgui/imgui_impl_sdl3.cpp
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@@ -6,7 +6,7 @@
// [X] Platform: Clipboard support.
// [X] Platform: Mouse support. Can discriminate Mouse/TouchScreen.
// [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 are obsolete since 1.87 and not supported since 1.91.5]
// [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
// [X] Platform: Gamepad support.
// [X] Platform: Mouse cursor shape and visibility (ImGuiBackendFlags_HasMouseCursors). Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
// [X] Platform: IME support.
@@ -20,6 +20,10 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2025-04-22: IME: honor ImGuiPlatformImeData->WantTextInput as an alternative way to call SDL_StartTextInput(), without IME being necessarily visible.
// 2025-04-09: Don't attempt to call SDL_CaptureMouse() on drivers where we don't call SDL_GetGlobalMouseState(). (#8561)
// 2025-03-30: Update for SDL3 api changes: Revert SDL_GetClipboardText() memory ownership change. (#8530, #7801)
// 2025-03-21: Fill gamepad inputs and set ImGuiBackendFlags_HasGamepad regardless of ImGuiConfigFlags_NavEnableGamepad being set.
// 2025-03-10: When dealing with OEM keys, use scancodes instead of translated keycodes to choose ImGuiKey values. (#7136, #7201, #7206, #7306, #7670, #7672, #8468)
// 2025-02-26: Only start SDL_CaptureMouse() when mouse is being dragged, to mitigate issues with e.g.Linux debuggers not claiming capture back. (#6410, #3650)
// 2025-02-24: Avoid calling SDL_GetGlobalMouseState() when mouse is in relative mode.
@@ -65,6 +69,7 @@
// SDL
#include <SDL3/SDL.h>
#include <stdio.h> // for snprintf()
#if defined(__APPLE__)
#include <TargetConditionals.h>
#endif
@@ -97,6 +102,7 @@ struct ImGui_ImplSDL3_Data
SDL_Renderer* Renderer;
Uint64 Time;
char* ClipboardTextData;
char BackendPlatformName[48];
// IME handling
SDL_Window* ImeWindow;
@@ -108,6 +114,7 @@ struct ImGui_ImplSDL3_Data
SDL_Cursor* MouseLastCursor;
int MousePendingLeaveFrame;
bool MouseCanUseGlobalState;
bool MouseCanUseCapture;
// Gamepad handling
ImVector<SDL_Gamepad*> Gamepads;
@@ -132,8 +139,7 @@ static const char* ImGui_ImplSDL3_GetClipboardText(ImGuiContext*)
ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
if (bd->ClipboardTextData)
SDL_free(bd->ClipboardTextData);
const char* sdl_clipboard_text = SDL_GetClipboardText();
bd->ClipboardTextData = sdl_clipboard_text ? SDL_strdup(sdl_clipboard_text) : nullptr;
bd->ClipboardTextData = SDL_GetClipboardText();
return bd->ClipboardTextData;
}
@@ -147,7 +153,7 @@ static void ImGui_ImplSDL3_PlatformSetImeData(ImGuiContext*, ImGuiViewport* view
ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
SDL_WindowID window_id = (SDL_WindowID)(intptr_t)viewport->PlatformHandle;
SDL_Window* window = SDL_GetWindowFromID(window_id);
if ((data->WantVisible == false || bd->ImeWindow != window) && bd->ImeWindow != nullptr)
if ((!(data->WantVisible || data->WantTextInput) || bd->ImeWindow != window) && bd->ImeWindow != nullptr)
{
SDL_StopTextInput(bd->ImeWindow);
bd->ImeWindow = nullptr;
@@ -160,9 +166,10 @@ static void ImGui_ImplSDL3_PlatformSetImeData(ImGuiContext*, ImGuiViewport* view
r.w = 1;
r.h = (int)data->InputLineHeight;
SDL_SetTextInputArea(window, &r, 0);
SDL_StartTextInput(window);
bd->ImeWindow = window;
}
if (data->WantVisible || data->WantTextInput)
SDL_StartTextInput(window);
}
// Not static to allow third-party code to use that if they want to (but undocumented)
@@ -460,28 +467,32 @@ static bool ImGui_ImplSDL3_Init(SDL_Window* window, SDL_Renderer* renderer, void
IM_ASSERT(io.BackendPlatformUserData == nullptr && "Already initialized a platform backend!");
IM_UNUSED(sdl_gl_context); // Unused in this branch
// Check and store if we are on a SDL backend that supports global mouse position
// ("wayland" and "rpi" don't support it, but we chose to use a white-list instead of a black-list)
bool mouse_can_use_global_state = false;
#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
const char* sdl_backend = SDL_GetCurrentVideoDriver();
const char* global_mouse_whitelist[] = { "windows", "cocoa", "x11", "DIVE", "VMAN" };
for (int n = 0; n < IM_ARRAYSIZE(global_mouse_whitelist); n++)
if (strncmp(sdl_backend, global_mouse_whitelist[n], strlen(global_mouse_whitelist[n])) == 0)
mouse_can_use_global_state = true;
#endif
const int ver_linked = SDL_GetVersion();
// Setup backend capabilities flags
ImGui_ImplSDL3_Data* bd = IM_NEW(ImGui_ImplSDL3_Data)();
snprintf(bd->BackendPlatformName, sizeof(bd->BackendPlatformName), "imgui_impl_sdl3 (%u.%u.%u; %u.%u.%u)",
SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_MICRO_VERSION, SDL_VERSIONNUM_MAJOR(ver_linked), SDL_VERSIONNUM_MINOR(ver_linked), SDL_VERSIONNUM_MICRO(ver_linked));
io.BackendPlatformUserData = (void*)bd;
io.BackendPlatformName = "imgui_impl_sdl3";
io.BackendPlatformName = bd->BackendPlatformName;
io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
bd->Window = window;
bd->WindowID = SDL_GetWindowID(window);
bd->Renderer = renderer;
bd->MouseCanUseGlobalState = mouse_can_use_global_state;
// Check and store if we are on a SDL backend that supports SDL_GetGlobalMouseState() and SDL_CaptureMouse()
// ("wayland" and "rpi" don't support it, but we chose to use a white-list instead of a black-list)
bd->MouseCanUseGlobalState = false;
bd->MouseCanUseCapture = false;
#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
const char* sdl_backend = SDL_GetCurrentVideoDriver();
const char* capture_and_global_state_whitelist[] = { "windows", "cocoa", "x11", "DIVE", "VMAN" };
for (const char* item : capture_and_global_state_whitelist)
if (strncmp(sdl_backend, item, strlen(item)) == 0)
bd->MouseCanUseGlobalState = bd->MouseCanUseCapture = true;
#endif
ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
platform_io.Platform_SetClipboardTextFn = ImGui_ImplSDL3_SetClipboardText;
@@ -595,12 +606,15 @@ static void ImGui_ImplSDL3_UpdateMouseData()
// We forward mouse input when hovered or captured (via SDL_EVENT_MOUSE_MOTION) or when focused (below)
#if SDL_HAS_CAPTURE_AND_GLOBAL_MOUSE
// - SDL_CaptureMouse() let the OS know e.g. that our drags can extend outside of parent boundaries (we want updated position) and shouldn't trigger other operations outside.
// - Debuggers under Linux tends to leave captured mouse on break, which may be very inconvenient, so to migitate the issue we wait until mouse has moved to begin capture.
bool want_capture = false;
for (int button_n = 0; button_n < ImGuiMouseButton_COUNT && !want_capture; button_n++)
if (ImGui::IsMouseDragging(button_n, 1.0f))
want_capture = true;
SDL_CaptureMouse(want_capture);
// - Debuggers under Linux tends to leave captured mouse on break, which may be very inconvenient, so to mitigate the issue we wait until mouse has moved to begin capture.
if (bd->MouseCanUseCapture)
{
bool want_capture = false;
for (int button_n = 0; button_n < ImGuiMouseButton_COUNT && !want_capture; button_n++)
if (ImGui::IsMouseDragging(button_n, 1.0f))
want_capture = true;
SDL_CaptureMouse(want_capture);
}
SDL_Window* focused_window = SDL_GetKeyboardFocus();
const bool is_app_focused = (bd->Window == focused_window);
@@ -724,9 +738,6 @@ static void ImGui_ImplSDL3_UpdateGamepads()
SDL_free(sdl_gamepads);
}
// FIXME: Technically feeding gamepad shouldn't depend on this now that they are regular inputs.
if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0)
return;
io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad;
if (bd->Gamepads.Size == 0)
return;
@@ -760,24 +771,30 @@ static void ImGui_ImplSDL3_UpdateGamepads()
ImGui_ImplSDL3_UpdateGamepadAnalog(bd, io, ImGuiKey_GamepadRStickDown, SDL_GAMEPAD_AXIS_RIGHTY, +thumb_dead_zone, +32767);
}
static void ImGui_ImplSDL3_GetWindowSizeAndFramebufferScale(SDL_Window* window, ImVec2* out_size, ImVec2* out_framebuffer_scale)
{
int w, h;
int display_w, display_h;
SDL_GetWindowSize(window, &w, &h);
if (SDL_GetWindowFlags(window) & SDL_WINDOW_MINIMIZED)
w = h = 0;
SDL_GetWindowSizeInPixels(window, &display_w, &display_h);
if (out_size != nullptr)
*out_size = ImVec2((float)w, (float)h);
if (out_framebuffer_scale != nullptr)
*out_framebuffer_scale = (w > 0 && h > 0) ? ImVec2((float)display_w / w, (float)display_h / h) : ImVec2(1.0f, 1.0f);
}
void ImGui_ImplSDL3_NewFrame()
{
ImGui_ImplSDL3_Data* bd = ImGui_ImplSDL3_GetBackendData();
IM_ASSERT(bd != nullptr && "Context or backend not initialized! Did you call ImGui_ImplSDL3_Init()?");
ImGuiIO& io = ImGui::GetIO();
// Setup display size (every frame to accommodate for window resizing)
int w, h;
int display_w, display_h;
SDL_GetWindowSize(bd->Window, &w, &h);
if (SDL_GetWindowFlags(bd->Window) & SDL_WINDOW_MINIMIZED)
w = h = 0;
SDL_GetWindowSizeInPixels(bd->Window, &display_w, &display_h);
io.DisplaySize = ImVec2((float)w, (float)h);
if (w > 0 && h > 0)
io.DisplayFramebufferScale = ImVec2((float)display_w / w, (float)display_h / h);
// Setup main viewport size (every frame to accommodate for window resizing)
ImGui_ImplSDL3_GetWindowSizeAndFramebufferScale(bd->Window, &io.DisplaySize, &io.DisplayFramebufferScale);
// Setup time step (we don't use SDL_GetTicks() because it is using millisecond resolution)
// Setup time step (we could also use SDL_GetTicksNS() available since SDL3)
// (Accept SDL_GetPerformanceCounter() not returning a monotonically increasing value. Happens in VMs and Emscripten, see #6189, #6114, #3644)
static Uint64 frequency = SDL_GetPerformanceFrequency();
Uint64 current_time = SDL_GetPerformanceCounter();