mirror of
https://github.com/Drezil/imgui.git
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Backends: moved global to a data structure to facilitate support for multi-contexts. (#586, #1851, #2004, #3012, #3934, #4141)
This is NOT enable multi-contexts for any backends - in order to make this commit as harmless as possible, while containing all the cruft/renaming -
This commit is contained in:
ocornut
@ -9,13 +9,14 @@
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// [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange' (note: the resizing cursors requires GLFW 3.4+).
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// [X] Platform: Keyboard arrays indexed using GLFW_KEY_* codes, e.g. ImGui::IsKeyPressed(GLFW_KEY_SPACE).
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// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
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// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this.
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// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need.
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// If you are new to Dear ImGui, read documentation from the docs/ folder + read the top of imgui.cpp.
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// Read online: https://github.com/ocornut/imgui/tree/master/docs
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// CHANGELOG
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// (minor and older changes stripped away, please see git history for details)
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// 2021-06-29: Reorganized backend to pull data from a single structure to facilitate usage with multiple-contexts (all g_XXXX access changed to bd->XXXX).
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// 2020-01-17: Inputs: Disable error callback while assigning mouse cursors because some X11 setup don't have them and it generates errors.
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// 2019-12-05: Inputs: Added support for new mouse cursors added in GLFW 3.4+ (resizing cursors, not allowed cursor).
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// 2019-10-18: Misc: Previously installed user callbacks are now restored on shutdown.
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@ -59,26 +60,39 @@
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#define GLFW_HAS_NEW_CURSORS (0)
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#endif
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// Data
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// GLFW data
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enum GlfwClientApi
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{
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GlfwClientApi_Unknown,
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GlfwClientApi_OpenGL,
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GlfwClientApi_Vulkan
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};
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static GLFWwindow* g_Window = NULL; // Main window
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static GlfwClientApi g_ClientApi = GlfwClientApi_Unknown;
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static double g_Time = 0.0;
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static bool g_MouseJustPressed[ImGuiMouseButton_COUNT] = {};
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static GLFWcursor* g_MouseCursors[ImGuiMouseCursor_COUNT] = {};
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static bool g_InstalledCallbacks = false;
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// Chain GLFW callbacks: our callbacks will call the user's previously installed callbacks, if any.
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static GLFWmousebuttonfun g_PrevUserCallbackMousebutton = NULL;
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static GLFWscrollfun g_PrevUserCallbackScroll = NULL;
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static GLFWkeyfun g_PrevUserCallbackKey = NULL;
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static GLFWcharfun g_PrevUserCallbackChar = NULL;
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struct ImGui_ImplGlfw_Data
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{
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GLFWwindow* Window;
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GlfwClientApi ClientApi;
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double Time;
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bool MouseJustPressed[ImGuiMouseButton_COUNT];
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GLFWcursor* MouseCursors[ImGuiMouseCursor_COUNT];
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bool InstalledCallbacks;
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// Chain GLFW callbacks: our callbacks will call the user's previously installed callbacks, if any.
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GLFWmousebuttonfun PrevUserCallbackMousebutton;
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GLFWscrollfun PrevUserCallbackScroll;
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GLFWkeyfun PrevUserCallbackKey;
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GLFWcharfun PrevUserCallbackChar;
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ImGui_ImplGlfw_Data() { memset(this, 0, sizeof(*this)); }
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};
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// Wrapping access to backend data (to facilitate multiple-contexts stored in io.BackendPlatformUserData)
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static ImGui_ImplGlfw_Data* g_Data;
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static ImGui_ImplGlfw_Data* ImGui_ImplGlfw_CreateBackendData() { IM_ASSERT(g_Data == NULL); g_Data = IM_NEW(ImGui_ImplGlfw_Data); return g_Data; }
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static ImGui_ImplGlfw_Data* ImGui_ImplGlfw_GetBackendData() { return ImGui::GetCurrentContext() != NULL ? g_Data : NULL; }
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static void ImGui_ImplGlfw_DestroyBackendData() { IM_DELETE(g_Data); g_Data = NULL; }
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// Functions
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static const char* ImGui_ImplGlfw_GetClipboardText(void* user_data)
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{
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return glfwGetClipboardString((GLFWwindow*)user_data);
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@ -91,17 +105,19 @@ static void ImGui_ImplGlfw_SetClipboardText(void* user_data, const char* text)
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void ImGui_ImplGlfw_MouseButtonCallback(GLFWwindow* window, int button, int action, int mods)
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{
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if (g_PrevUserCallbackMousebutton != NULL)
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g_PrevUserCallbackMousebutton(window, button, action, mods);
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ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
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if (bd->PrevUserCallbackMousebutton != NULL)
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bd->PrevUserCallbackMousebutton(window, button, action, mods);
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if (action == GLFW_PRESS && button >= 0 && button < IM_ARRAYSIZE(g_MouseJustPressed))
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g_MouseJustPressed[button] = true;
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if (action == GLFW_PRESS && button >= 0 && button < IM_ARRAYSIZE(bd->MouseJustPressed))
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bd->MouseJustPressed[button] = true;
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}
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void ImGui_ImplGlfw_ScrollCallback(GLFWwindow* window, double xoffset, double yoffset)
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{
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if (g_PrevUserCallbackScroll != NULL)
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g_PrevUserCallbackScroll(window, xoffset, yoffset);
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ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
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if (bd->PrevUserCallbackScroll != NULL)
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bd->PrevUserCallbackScroll(window, xoffset, yoffset);
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ImGuiIO& io = ImGui::GetIO();
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io.MouseWheelH += (float)xoffset;
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@ -110,8 +126,9 @@ void ImGui_ImplGlfw_ScrollCallback(GLFWwindow* window, double xoffset, double yo
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void ImGui_ImplGlfw_KeyCallback(GLFWwindow* window, int key, int scancode, int action, int mods)
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{
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if (g_PrevUserCallbackKey != NULL)
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g_PrevUserCallbackKey(window, key, scancode, action, mods);
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ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
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if (bd->PrevUserCallbackKey != NULL)
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bd->PrevUserCallbackKey(window, key, scancode, action, mods);
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ImGuiIO& io = ImGui::GetIO();
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if (key >= 0 && key < IM_ARRAYSIZE(io.KeysDown))
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@ -135,8 +152,9 @@ void ImGui_ImplGlfw_KeyCallback(GLFWwindow* window, int key, int scancode, int a
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void ImGui_ImplGlfw_CharCallback(GLFWwindow* window, unsigned int c)
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{
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if (g_PrevUserCallbackChar != NULL)
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g_PrevUserCallbackChar(window, c);
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ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
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if (bd->PrevUserCallbackChar != NULL)
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bd->PrevUserCallbackChar(window, c);
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ImGuiIO& io = ImGui::GetIO();
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io.AddInputCharacter(c);
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@ -144,14 +162,18 @@ void ImGui_ImplGlfw_CharCallback(GLFWwindow* window, unsigned int c)
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static bool ImGui_ImplGlfw_Init(GLFWwindow* window, bool install_callbacks, GlfwClientApi client_api)
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{
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g_Window = window;
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g_Time = 0.0;
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ImGuiIO& io = ImGui::GetIO();
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IM_ASSERT(io.BackendPlatformUserData == NULL && "Already initialized a platform backend!");
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ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_CreateBackendData();
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bd->Window = window;
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bd->Time = 0.0;
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// Setup backend capabilities flags
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ImGuiIO& io = ImGui::GetIO();
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io.BackendPlatformUserData = (void*)bd;
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io.BackendPlatformName = "imgui_impl_glfw";
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io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors; // We can honor GetMouseCursor() values (optional)
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io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos; // We can honor io.WantSetMousePos requests (optional, rarely used)
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io.BackendPlatformName = "imgui_impl_glfw";
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// Keyboard mapping. Dear ImGui will use those indices to peek into the io.KeysDown[] array.
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io.KeyMap[ImGuiKey_Tab] = GLFW_KEY_TAB;
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@ -179,9 +201,9 @@ static bool ImGui_ImplGlfw_Init(GLFWwindow* window, bool install_callbacks, Glfw
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io.SetClipboardTextFn = ImGui_ImplGlfw_SetClipboardText;
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io.GetClipboardTextFn = ImGui_ImplGlfw_GetClipboardText;
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io.ClipboardUserData = g_Window;
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io.ClipboardUserData = bd->Window;
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#if defined(_WIN32)
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io.ImeWindowHandle = (void*)glfwGetWin32Window(g_Window);
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io.ImeWindowHandle = (void*)glfwGetWin32Window(bd->Window);
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#endif
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// Create mouse cursors
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@ -189,39 +211,39 @@ static bool ImGui_ImplGlfw_Init(GLFWwindow* window, bool install_callbacks, Glfw
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// GLFW will emit an error which will often be printed by the app, so we temporarily disable error reporting.
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// Missing cursors will return NULL and our _UpdateMouseCursor() function will use the Arrow cursor instead.)
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GLFWerrorfun prev_error_callback = glfwSetErrorCallback(NULL);
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g_MouseCursors[ImGuiMouseCursor_Arrow] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
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g_MouseCursors[ImGuiMouseCursor_TextInput] = glfwCreateStandardCursor(GLFW_IBEAM_CURSOR);
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g_MouseCursors[ImGuiMouseCursor_ResizeNS] = glfwCreateStandardCursor(GLFW_VRESIZE_CURSOR);
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g_MouseCursors[ImGuiMouseCursor_ResizeEW] = glfwCreateStandardCursor(GLFW_HRESIZE_CURSOR);
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g_MouseCursors[ImGuiMouseCursor_Hand] = glfwCreateStandardCursor(GLFW_HAND_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_Arrow] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_TextInput] = glfwCreateStandardCursor(GLFW_IBEAM_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_ResizeNS] = glfwCreateStandardCursor(GLFW_VRESIZE_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_ResizeEW] = glfwCreateStandardCursor(GLFW_HRESIZE_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_Hand] = glfwCreateStandardCursor(GLFW_HAND_CURSOR);
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#if GLFW_HAS_NEW_CURSORS
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g_MouseCursors[ImGuiMouseCursor_ResizeAll] = glfwCreateStandardCursor(GLFW_RESIZE_ALL_CURSOR);
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g_MouseCursors[ImGuiMouseCursor_ResizeNESW] = glfwCreateStandardCursor(GLFW_RESIZE_NESW_CURSOR);
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g_MouseCursors[ImGuiMouseCursor_ResizeNWSE] = glfwCreateStandardCursor(GLFW_RESIZE_NWSE_CURSOR);
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g_MouseCursors[ImGuiMouseCursor_NotAllowed] = glfwCreateStandardCursor(GLFW_NOT_ALLOWED_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_ResizeAll] = glfwCreateStandardCursor(GLFW_RESIZE_ALL_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_ResizeNESW] = glfwCreateStandardCursor(GLFW_RESIZE_NESW_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_ResizeNWSE] = glfwCreateStandardCursor(GLFW_RESIZE_NWSE_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_NotAllowed] = glfwCreateStandardCursor(GLFW_NOT_ALLOWED_CURSOR);
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#else
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g_MouseCursors[ImGuiMouseCursor_ResizeAll] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
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g_MouseCursors[ImGuiMouseCursor_ResizeNESW] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
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g_MouseCursors[ImGuiMouseCursor_ResizeNWSE] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
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g_MouseCursors[ImGuiMouseCursor_NotAllowed] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_ResizeAll] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_ResizeNESW] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_ResizeNWSE] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
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bd->MouseCursors[ImGuiMouseCursor_NotAllowed] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
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#endif
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glfwSetErrorCallback(prev_error_callback);
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// Chain GLFW callbacks: our callbacks will call the user's previously installed callbacks, if any.
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g_PrevUserCallbackMousebutton = NULL;
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g_PrevUserCallbackScroll = NULL;
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g_PrevUserCallbackKey = NULL;
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g_PrevUserCallbackChar = NULL;
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bd->PrevUserCallbackMousebutton = NULL;
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bd->PrevUserCallbackScroll = NULL;
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bd->PrevUserCallbackKey = NULL;
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bd->PrevUserCallbackChar = NULL;
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if (install_callbacks)
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{
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g_InstalledCallbacks = true;
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g_PrevUserCallbackMousebutton = glfwSetMouseButtonCallback(window, ImGui_ImplGlfw_MouseButtonCallback);
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g_PrevUserCallbackScroll = glfwSetScrollCallback(window, ImGui_ImplGlfw_ScrollCallback);
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g_PrevUserCallbackKey = glfwSetKeyCallback(window, ImGui_ImplGlfw_KeyCallback);
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g_PrevUserCallbackChar = glfwSetCharCallback(window, ImGui_ImplGlfw_CharCallback);
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bd->InstalledCallbacks = true;
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bd->PrevUserCallbackMousebutton = glfwSetMouseButtonCallback(window, ImGui_ImplGlfw_MouseButtonCallback);
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bd->PrevUserCallbackScroll = glfwSetScrollCallback(window, ImGui_ImplGlfw_ScrollCallback);
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bd->PrevUserCallbackKey = glfwSetKeyCallback(window, ImGui_ImplGlfw_KeyCallback);
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bd->PrevUserCallbackChar = glfwSetCharCallback(window, ImGui_ImplGlfw_CharCallback);
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}
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g_ClientApi = client_api;
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bd->ClientApi = client_api;
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return true;
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}
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@ -242,32 +264,40 @@ bool ImGui_ImplGlfw_InitForOther(GLFWwindow* window, bool install_callbacks)
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void ImGui_ImplGlfw_Shutdown()
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{
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if (g_InstalledCallbacks)
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ImGuiIO& io = ImGui::GetIO();
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ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
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if (bd->InstalledCallbacks)
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{
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glfwSetMouseButtonCallback(g_Window, g_PrevUserCallbackMousebutton);
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glfwSetScrollCallback(g_Window, g_PrevUserCallbackScroll);
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glfwSetKeyCallback(g_Window, g_PrevUserCallbackKey);
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glfwSetCharCallback(g_Window, g_PrevUserCallbackChar);
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g_InstalledCallbacks = false;
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glfwSetMouseButtonCallback(bd->Window, bd->PrevUserCallbackMousebutton);
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glfwSetScrollCallback(bd->Window, bd->PrevUserCallbackScroll);
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glfwSetKeyCallback(bd->Window, bd->PrevUserCallbackKey);
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glfwSetCharCallback(bd->Window, bd->PrevUserCallbackChar);
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bd->InstalledCallbacks = false;
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}
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for (ImGuiMouseCursor cursor_n = 0; cursor_n < ImGuiMouseCursor_COUNT; cursor_n++)
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{
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glfwDestroyCursor(g_MouseCursors[cursor_n]);
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g_MouseCursors[cursor_n] = NULL;
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glfwDestroyCursor(bd->MouseCursors[cursor_n]);
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bd->MouseCursors[cursor_n] = NULL;
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}
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g_ClientApi = GlfwClientApi_Unknown;
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io.BackendPlatformName = NULL;
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io.BackendPlatformUserData = NULL;
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ImGui_ImplGlfw_DestroyBackendData();
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}
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static void ImGui_ImplGlfw_UpdateMousePosAndButtons()
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{
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ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
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// Update buttons
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ImGuiIO& io = ImGui::GetIO();
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for (int i = 0; i < IM_ARRAYSIZE(io.MouseDown); i++)
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{
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// If a mouse press event came, always pass it as "mouse held this frame", so we don't miss click-release events that are shorter than 1 frame.
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io.MouseDown[i] = g_MouseJustPressed[i] || glfwGetMouseButton(g_Window, i) != 0;
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g_MouseJustPressed[i] = false;
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io.MouseDown[i] = bd->MouseJustPressed[i] || glfwGetMouseButton(bd->Window, i) != 0;
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bd->MouseJustPressed[i] = false;
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}
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// Update mouse position
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@ -276,18 +306,18 @@ static void ImGui_ImplGlfw_UpdateMousePosAndButtons()
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#ifdef __EMSCRIPTEN__
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const bool focused = true; // Emscripten
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#else
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const bool focused = glfwGetWindowAttrib(g_Window, GLFW_FOCUSED) != 0;
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const bool focused = glfwGetWindowAttrib(bd->Window, GLFW_FOCUSED) != 0;
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#endif
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if (focused)
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{
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if (io.WantSetMousePos)
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{
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glfwSetCursorPos(g_Window, (double)mouse_pos_backup.x, (double)mouse_pos_backup.y);
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glfwSetCursorPos(bd->Window, (double)mouse_pos_backup.x, (double)mouse_pos_backup.y);
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}
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else
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{
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double mouse_x, mouse_y;
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glfwGetCursorPos(g_Window, &mouse_x, &mouse_y);
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glfwGetCursorPos(bd->Window, &mouse_x, &mouse_y);
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io.MousePos = ImVec2((float)mouse_x, (float)mouse_y);
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}
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}
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@ -296,21 +326,22 @@ static void ImGui_ImplGlfw_UpdateMousePosAndButtons()
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static void ImGui_ImplGlfw_UpdateMouseCursor()
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{
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ImGuiIO& io = ImGui::GetIO();
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if ((io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange) || glfwGetInputMode(g_Window, GLFW_CURSOR) == GLFW_CURSOR_DISABLED)
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ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
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if ((io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange) || glfwGetInputMode(bd->Window, GLFW_CURSOR) == GLFW_CURSOR_DISABLED)
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return;
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ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor();
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if (imgui_cursor == ImGuiMouseCursor_None || io.MouseDrawCursor)
|
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{
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// Hide OS mouse cursor if imgui is drawing it or if it wants no cursor
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glfwSetInputMode(g_Window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
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glfwSetInputMode(bd->Window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
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}
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else
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{
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// Show OS mouse cursor
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// FIXME-PLATFORM: Unfocused windows seems to fail changing the mouse cursor with GLFW 3.2, but 3.3 works here.
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glfwSetCursor(g_Window, g_MouseCursors[imgui_cursor] ? g_MouseCursors[imgui_cursor] : g_MouseCursors[ImGuiMouseCursor_Arrow]);
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glfwSetInputMode(g_Window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
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glfwSetCursor(bd->Window, bd->MouseCursors[imgui_cursor] ? bd->MouseCursors[imgui_cursor] : bd->MouseCursors[ImGuiMouseCursor_Arrow]);
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glfwSetInputMode(bd->Window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
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}
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}
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@ -354,20 +385,21 @@ static void ImGui_ImplGlfw_UpdateGamepads()
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void ImGui_ImplGlfw_NewFrame()
|
||||
{
|
||||
ImGuiIO& io = ImGui::GetIO();
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||||
ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
|
||||
|
||||
// Setup display size (every frame to accommodate for window resizing)
|
||||
int w, h;
|
||||
int display_w, display_h;
|
||||
glfwGetWindowSize(g_Window, &w, &h);
|
||||
glfwGetFramebufferSize(g_Window, &display_w, &display_h);
|
||||
glfwGetWindowSize(bd->Window, &w, &h);
|
||||
glfwGetFramebufferSize(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 time step
|
||||
double current_time = glfwGetTime();
|
||||
io.DeltaTime = g_Time > 0.0 ? (float)(current_time - g_Time) : (float)(1.0f / 60.0f);
|
||||
g_Time = current_time;
|
||||
io.DeltaTime = bd->Time > 0.0 ? (float)(current_time - bd->Time) : (float)(1.0f / 60.0f);
|
||||
bd->Time = current_time;
|
||||
|
||||
ImGui_ImplGlfw_UpdateMousePosAndButtons();
|
||||
ImGui_ImplGlfw_UpdateMouseCursor();
|
||||
|
||||
Reference in New Issue
Block a user