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33c2cf60cc656f9611639fae3633c31529b16375
AC6_recomp/thirdparty/rexglue-sdk/src/ui/imgui_drawer.cpp
T
Dipshet 33c2cf60cc Fix overlay input leaking into the game: explicit input ownership 
Interacting with the overlays also drove the game (clicks fired
weapons, scroll cycled them, keys leaked), and hovering one silenced a real
pad. Input now follows window-manager rules, mouse to the window under the
cursor, keyboard to the focused window, real pads never suppressed, via
ImGui capture flags conjoined with overlay visibility, published as atomics.
2026-08-06 00:43:34 +02:00

692 lines
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/**
******************************************************************************
* Xenia : Xbox 360 Emulator Research Project *
******************************************************************************
* Copyright 2022 Ben Vanik. All rights reserved. *
* Released under the BSD license - see LICENSE in the root for more details. *
******************************************************************************
*
* @modified Tom Clay, 2026 - Adapted for ReXGlue runtime
*/
#include <cfloat>
#include <cstring>
#include <filesystem>
#include <map>
#include <rex/assert.h>
#include <rex/chrono/clock.h>
#include <rex/logging.h>
#include <rex/ui/imgui_dialog.h>
#include <rex/ui/imgui_drawer.h>
#include <rex/ui/ui_event.h>
#include <rex/ui/window.h>
#include <imgui.h>
namespace rex {
namespace ui {
// File: 'ProggyTiny.ttf' (35656 bytes)
// Exported using binary_to_compressed_c.cpp
const char kProggyTinyCompressedDataBase85[10950 + 1] =
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static_assert(sizeof(ImmediateVertex) == sizeof(ImDrawVert), "Vertex types must match");
std::atomic<bool> ImGuiDrawer::dialogs_capture_mouse_{false};
std::atomic<bool> ImGuiDrawer::dialogs_capture_keyboard_{false};
std::atomic<bool> ImGuiDrawer::dialogs_want_text_input_{false};
void ImGuiDrawer::PublishDialogInputOwnership(bool capture_mouse, bool capture_keyboard,
bool want_text_input) {
dialogs_capture_mouse_.store(capture_mouse, std::memory_order_relaxed);
dialogs_capture_keyboard_.store(capture_keyboard, std::memory_order_relaxed);
dialogs_want_text_input_.store(want_text_input, std::memory_order_relaxed);
}
ImGuiDrawer::ImGuiDrawer(rex::ui::Window* window, size_t z_order, FontSetupCallback font_setup)
: window_(window), z_order_(z_order), font_setup_(std::move(font_setup)) {
Initialize();
}
ImGuiDrawer::~ImGuiDrawer() {
SetPresenter(nullptr);
if (!dialogs_.empty()) {
window_->RemoveInputListener(this);
if (internal_state_) {
ImGui::SetCurrentContext(internal_state_);
if (touch_pointer_id_ == TouchEvent::kPointerIDNone && ImGui::IsAnyMouseDown()) {
window_->ReleaseMouse();
}
}
}
if (internal_state_) {
ImGui::DestroyContext(internal_state_);
internal_state_ = nullptr;
}
}
void ImGuiDrawer::AddDialog(ImGuiDialog* dialog) {
assert_not_null(dialog);
// Check if already added.
if (std::find(dialogs_.cbegin(), dialogs_.cend(), dialog) != dialogs_.cend()) {
return;
}
if (dialogs_.empty() && !IsDrawingDialogs()) {
// First dialog added. !IsDrawingDialogs() is also checked because in a
// situation of removing the only dialog, then adding a dialog, from within
// a dialog's Draw function, re-registering the ImGuiDrawer may result in
// ImGui being drawn multiple times in the current frame.
window_->AddInputListener(this, z_order_);
if (presenter_) {
presenter_->AddUIDrawerFromUIThread(this, z_order_);
}
}
dialogs_.push_back(dialog);
}
void ImGuiDrawer::RemoveDialog(ImGuiDialog* dialog) {
assert_not_null(dialog);
auto it = std::find(dialogs_.cbegin(), dialogs_.cend(), dialog);
if (it == dialogs_.cend()) {
return;
}
if (IsDrawingDialogs()) {
// Actualize the next dialog index after the erasure from the vector.
size_t existing_index = size_t(std::distance(dialogs_.cbegin(), it));
if (dialog_loop_next_index_ > existing_index) {
--dialog_loop_next_index_;
}
}
dialogs_.erase(it);
DetachIfLastDialogRemoved();
}
void ImGuiDrawer::Initialize() {
// Setup ImGui internal state.
// This will give us state we can swap to the ImGui globals when in use.
internal_state_ = ImGui::CreateContext();
ImGui::SetCurrentContext(internal_state_);
auto& io = ImGui::GetIO();
// TODO(gibbed): disable imgui.ini saving for now,
// imgui assumes paths are char* so we can't throw a good path at it on
// Windows.
io.IniFilename = nullptr;
// Setup the font glyphs.
ImFontConfig font_config;
font_config.OversampleH = font_config.OversampleV = 1;
font_config.PixelSnapH = true;
static const ImWchar font_glyph_ranges[] = {
0x0020,
0x00FF, // Basic Latin + Latin Supplement
0,
};
io.Fonts->AddFontFromMemoryCompressedBase85TTF(kProggyTinyCompressedDataBase85, 10.0f,
&font_config, font_glyph_ranges);
#if REX_PLATFORM_WIN32
// TODO(benvanik): jp font on other platforms?
// https://github.com/Koruri/kibitaki looks really good, but is 1.5MiB.
const char* jp_font_path = "C:\\Windows\\Fonts\\msgothic.ttc";
if (std::filesystem::exists(jp_font_path)) {
ImFontConfig jp_font_config;
jp_font_config.MergeMode = true;
jp_font_config.OversampleH = jp_font_config.OversampleV = 1;
jp_font_config.PixelSnapH = true;
jp_font_config.FontNo = 0;
io.Fonts->AddFontFromFileTTF(jp_font_path, 12.0f, &jp_font_config,
io.Fonts->GetGlyphRangesJapanese());
} else {
REXLOG_WARN("Unable to load Japanese font; JP characters will be boxes");
}
#endif
if (font_setup_) {
font_setup_(io.Fonts);
}
auto& style = ImGui::GetStyle();
style.ScrollbarRounding = 0;
style.WindowRounding = 0;
style.TabRounding = 0;
style.Colors[ImGuiCol_Text] = ImVec4(0.89f, 0.90f, 0.90f, 1.00f);
style.Colors[ImGuiCol_TextDisabled] = ImVec4(0.60f, 0.60f, 0.60f, 1.00f);
style.Colors[ImGuiCol_WindowBg] = ImVec4(0.00f, 0.06f, 0.00f, 1.00f);
style.Colors[ImGuiCol_ChildBg] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
style.Colors[ImGuiCol_Border] = ImVec4(0.00f, 0.35f, 0.00f, 1.00f);
style.Colors[ImGuiCol_BorderShadow] = ImVec4(0.00f, 0.00f, 0.00f, 0.00f);
style.Colors[ImGuiCol_FrameBg] = ImVec4(0.80f, 0.80f, 0.80f, 0.30f);
style.Colors[ImGuiCol_FrameBgHovered] = ImVec4(0.90f, 0.80f, 0.80f, 0.40f);
style.Colors[ImGuiCol_FrameBgActive] = ImVec4(0.90f, 0.65f, 0.65f, 0.45f);
style.Colors[ImGuiCol_TitleBg] = ImVec4(0.00f, 0.40f, 0.00f, 1.00f);
style.Colors[ImGuiCol_TitleBgCollapsed] = ImVec4(0.00f, 0.33f, 0.00f, 1.00f);
style.Colors[ImGuiCol_TitleBgActive] = ImVec4(0.16f, 0.65f, 0.00f, 1.00f);
style.Colors[ImGuiCol_MenuBarBg] = ImVec4(0.00f, 0.35f, 0.00f, 1.00f);
style.Colors[ImGuiCol_ScrollbarBg] = ImVec4(0.00f, 0.40f, 0.11f, 0.59f);
style.Colors[ImGuiCol_ScrollbarGrab] = ImVec4(0.00f, 0.68f, 0.00f, 0.68f);
style.Colors[ImGuiCol_ScrollbarGrabHovered] = ImVec4(0.00f, 1.00f, 0.15f, 0.62f);
style.Colors[ImGuiCol_ScrollbarGrabActive] = ImVec4(0.00f, 0.91f, 0.09f, 0.40f);
style.Colors[ImGuiCol_PopupBg] = ImVec4(0.20f, 0.20f, 0.20f, 0.99f);
style.Colors[ImGuiCol_CheckMark] = ImVec4(0.74f, 0.90f, 0.72f, 0.50f);
style.Colors[ImGuiCol_SliderGrab] = ImVec4(1.00f, 1.00f, 1.00f, 0.30f);
style.Colors[ImGuiCol_SliderGrabActive] = ImVec4(0.34f, 0.75f, 0.11f, 1.00f);
style.Colors[ImGuiCol_Button] = ImVec4(0.15f, 0.56f, 0.11f, 0.60f);
style.Colors[ImGuiCol_ButtonHovered] = ImVec4(0.19f, 0.72f, 0.09f, 1.00f);
style.Colors[ImGuiCol_ButtonActive] = ImVec4(0.19f, 0.60f, 0.09f, 1.00f);
style.Colors[ImGuiCol_Header] = ImVec4(0.00f, 0.40f, 0.00f, 0.71f);
style.Colors[ImGuiCol_HeaderHovered] = ImVec4(0.00f, 0.60f, 0.26f, 0.80f);
style.Colors[ImGuiCol_HeaderActive] = ImVec4(0.00f, 0.75f, 0.00f, 0.80f);
style.Colors[ImGuiCol_Separator] = ImVec4(0.00f, 0.35f, 0.00f, 1.00f);
style.Colors[ImGuiCol_SeparatorHovered] = ImVec4(0.36f, 0.89f, 0.38f, 1.00f);
style.Colors[ImGuiCol_SeparatorActive] = ImVec4(0.13f, 0.50f, 0.11f, 1.00f);
style.Colors[ImGuiCol_ResizeGrip] = ImVec4(1.00f, 1.00f, 1.00f, 0.30f);
style.Colors[ImGuiCol_ResizeGripHovered] = ImVec4(1.00f, 1.00f, 1.00f, 0.60f);
style.Colors[ImGuiCol_ResizeGripActive] = ImVec4(1.00f, 1.00f, 1.00f, 0.90f);
style.Colors[ImGuiCol_Tab] = style.Colors[ImGuiCol_Button];
style.Colors[ImGuiCol_TabHovered] = style.Colors[ImGuiCol_ButtonHovered];
style.Colors[ImGuiCol_TabActive] = style.Colors[ImGuiCol_ButtonActive];
style.Colors[ImGuiCol_TabUnfocused] = style.Colors[ImGuiCol_FrameBg];
style.Colors[ImGuiCol_TabUnfocusedActive] = style.Colors[ImGuiCol_FrameBgHovered];
style.Colors[ImGuiCol_PlotLines] = ImVec4(1.00f, 1.00f, 1.00f, 1.00f);
style.Colors[ImGuiCol_PlotLinesHovered] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
style.Colors[ImGuiCol_PlotHistogram] = ImVec4(0.90f, 0.70f, 0.00f, 1.00f);
style.Colors[ImGuiCol_PlotHistogramHovered] = ImVec4(1.00f, 0.60f, 0.00f, 1.00f);
style.Colors[ImGuiCol_TextSelectedBg] = ImVec4(0.00f, 1.00f, 0.00f, 0.21f);
style.Colors[ImGuiCol_ModalWindowDimBg] = ImVec4(0.20f, 0.20f, 0.20f, 0.35f);
frame_time_tick_frequency_ = double(rex::chrono::Clock::QueryHostTickFrequency());
last_frame_time_ticks_ = rex::chrono::Clock::QueryHostTickCount();
touch_pointer_id_ = TouchEvent::kPointerIDNone;
reset_mouse_position_after_next_frame_ = false;
}
std::optional<ImGuiKey> ImGuiDrawer::VirtualKeyToImGuiKey(VirtualKey vkey) {
static const std::map<VirtualKey, ImGuiKey> map = {
// Navigation
{ui::VirtualKey::kTab, ImGuiKey_Tab},
{ui::VirtualKey::kLeft, ImGuiKey_LeftArrow},
{ui::VirtualKey::kRight, ImGuiKey_RightArrow},
{ui::VirtualKey::kUp, ImGuiKey_UpArrow},
{ui::VirtualKey::kDown, ImGuiKey_DownArrow},
{ui::VirtualKey::kHome, ImGuiKey_Home},
{ui::VirtualKey::kEnd, ImGuiKey_End},
{ui::VirtualKey::kPrior, ImGuiKey_PageUp},
{ui::VirtualKey::kNext, ImGuiKey_PageDown},
{ui::VirtualKey::kInsert, ImGuiKey_Insert},
{ui::VirtualKey::kDelete, ImGuiKey_Delete},
{ui::VirtualKey::kBack, ImGuiKey_Backspace},
{ui::VirtualKey::kReturn, ImGuiKey_Enter},
{ui::VirtualKey::kEscape, ImGuiKey_Escape},
{ui::VirtualKey::kSpace, ImGuiKey_Space},
// Letters
{ui::VirtualKey::kA, ImGuiKey_A},
{ui::VirtualKey::kB, ImGuiKey_B},
{ui::VirtualKey::kC, ImGuiKey_C},
{ui::VirtualKey::kD, ImGuiKey_D},
{ui::VirtualKey::kE, ImGuiKey_E},
{ui::VirtualKey::kF, ImGuiKey_F},
{ui::VirtualKey::kG, ImGuiKey_G},
{ui::VirtualKey::kH, ImGuiKey_H},
{ui::VirtualKey::kI, ImGuiKey_I},
{ui::VirtualKey::kJ, ImGuiKey_J},
{ui::VirtualKey::kK, ImGuiKey_K},
{ui::VirtualKey::kL, ImGuiKey_L},
{ui::VirtualKey::kM, ImGuiKey_M},
{ui::VirtualKey::kN, ImGuiKey_N},
{ui::VirtualKey::kO, ImGuiKey_O},
{ui::VirtualKey::kP, ImGuiKey_P},
{ui::VirtualKey::kQ, ImGuiKey_Q},
{ui::VirtualKey::kR, ImGuiKey_R},
{ui::VirtualKey::kS, ImGuiKey_S},
{ui::VirtualKey::kT, ImGuiKey_T},
{ui::VirtualKey::kU, ImGuiKey_U},
{ui::VirtualKey::kV, ImGuiKey_V},
{ui::VirtualKey::kW, ImGuiKey_W},
{ui::VirtualKey::kX, ImGuiKey_X},
{ui::VirtualKey::kY, ImGuiKey_Y},
{ui::VirtualKey::kZ, ImGuiKey_Z},
// Digits
{ui::VirtualKey::k0, ImGuiKey_0},
{ui::VirtualKey::k1, ImGuiKey_1},
{ui::VirtualKey::k2, ImGuiKey_2},
{ui::VirtualKey::k3, ImGuiKey_3},
{ui::VirtualKey::k4, ImGuiKey_4},
{ui::VirtualKey::k5, ImGuiKey_5},
{ui::VirtualKey::k6, ImGuiKey_6},
{ui::VirtualKey::k7, ImGuiKey_7},
{ui::VirtualKey::k8, ImGuiKey_8},
{ui::VirtualKey::k9, ImGuiKey_9},
// Function keys
{ui::VirtualKey::kF1, ImGuiKey_F1},
{ui::VirtualKey::kF2, ImGuiKey_F2},
{ui::VirtualKey::kF3, ImGuiKey_F3},
{ui::VirtualKey::kF4, ImGuiKey_F4},
{ui::VirtualKey::kF5, ImGuiKey_F5},
{ui::VirtualKey::kF6, ImGuiKey_F6},
{ui::VirtualKey::kF7, ImGuiKey_F7},
{ui::VirtualKey::kF8, ImGuiKey_F8},
{ui::VirtualKey::kF9, ImGuiKey_F9},
{ui::VirtualKey::kF10, ImGuiKey_F10},
{ui::VirtualKey::kF11, ImGuiKey_F11},
{ui::VirtualKey::kF12, ImGuiKey_F12},
// Modifiers
{ui::VirtualKey::kShift, ImGuiKey_LeftShift},
{ui::VirtualKey::kControl, ImGuiKey_LeftCtrl},
{ui::VirtualKey::kMenu, ImGuiKey_LeftAlt},
{ui::VirtualKey::kCapital, ImGuiKey_CapsLock},
{ui::VirtualKey::kNumLock, ImGuiKey_NumLock},
{ui::VirtualKey::kScroll, ImGuiKey_ScrollLock},
{ui::VirtualKey::kSnapshot, ImGuiKey_PrintScreen},
{ui::VirtualKey::kPause, ImGuiKey_Pause},
// OEM keys
{ui::VirtualKey::kOem3, ImGuiKey_GraveAccent},
{ui::VirtualKey::kOemMinus, ImGuiKey_Minus},
{ui::VirtualKey::kOemPlus, ImGuiKey_Equal},
{ui::VirtualKey::kOem4, ImGuiKey_LeftBracket},
{ui::VirtualKey::kOem6, ImGuiKey_RightBracket},
{ui::VirtualKey::kOem5, ImGuiKey_Backslash},
{ui::VirtualKey::kOem1, ImGuiKey_Semicolon},
{ui::VirtualKey::kOem7, ImGuiKey_Apostrophe},
{ui::VirtualKey::kOemComma, ImGuiKey_Comma},
{ui::VirtualKey::kOemPeriod, ImGuiKey_Period},
{ui::VirtualKey::kOem2, ImGuiKey_Slash},
// Numpad
{ui::VirtualKey::kNumpad0, ImGuiKey_Keypad0},
{ui::VirtualKey::kNumpad1, ImGuiKey_Keypad1},
{ui::VirtualKey::kNumpad2, ImGuiKey_Keypad2},
{ui::VirtualKey::kNumpad3, ImGuiKey_Keypad3},
{ui::VirtualKey::kNumpad4, ImGuiKey_Keypad4},
{ui::VirtualKey::kNumpad5, ImGuiKey_Keypad5},
{ui::VirtualKey::kNumpad6, ImGuiKey_Keypad6},
{ui::VirtualKey::kNumpad7, ImGuiKey_Keypad7},
{ui::VirtualKey::kNumpad8, ImGuiKey_Keypad8},
{ui::VirtualKey::kNumpad9, ImGuiKey_Keypad9},
{ui::VirtualKey::kAdd, ImGuiKey_KeypadAdd},
{ui::VirtualKey::kSubtract, ImGuiKey_KeypadSubtract},
{ui::VirtualKey::kMultiply, ImGuiKey_KeypadMultiply},
{ui::VirtualKey::kDivide, ImGuiKey_KeypadDivide},
{ui::VirtualKey::kDecimal, ImGuiKey_KeypadDecimal},
};
if (auto search = map.find(vkey); search != map.end()) {
return search->second;
} else {
return std::nullopt;
}
}
void ImGuiDrawer::SetupFontTexture() {
if (font_texture_ || !immediate_drawer_) {
return;
}
ImGuiIO& io = GetIO();
unsigned char* pixels;
int width, height;
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
font_texture_ = immediate_drawer_->CreateTexture(width, height, ImmediateTextureFilter::kLinear,
true, reinterpret_cast<uint8_t*>(pixels));
io.Fonts->TexID = reinterpret_cast<ImTextureID>(font_texture_.get());
}
void ImGuiDrawer::SetPresenter(Presenter* new_presenter) {
if (presenter_) {
if (presenter_ == new_presenter) {
return;
}
if (!dialogs_.empty()) {
presenter_->RemoveUIDrawerFromUIThread(this);
}
ImGuiIO& io = GetIO();
}
presenter_ = new_presenter;
if (presenter_) {
if (!dialogs_.empty()) {
presenter_->AddUIDrawerFromUIThread(this, z_order_);
}
}
}
void ImGuiDrawer::SetImmediateDrawer(ImmediateDrawer* new_immediate_drawer) {
if (immediate_drawer_ == new_immediate_drawer) {
return;
}
if (immediate_drawer_) {
GetIO().Fonts->TexID = ImTextureID{};
font_texture_.reset();
}
immediate_drawer_ = new_immediate_drawer;
if (immediate_drawer_) {
SetupFontTexture();
}
}
void ImGuiDrawer::Draw(UIDrawContext& ui_draw_context) {
// Drawing of anything is initiated by the presenter.
assert_not_null(presenter_);
if (!immediate_drawer_) {
// A presenter has been attached, but an immediate drawer hasn't been
// attached yet.
PublishDialogInputOwnership(false, false, false);
return;
}
if (dialogs_.empty()) {
PublishDialogInputOwnership(false, false, false);
return;
}
ImGui::SetCurrentContext(internal_state_);
ImGuiIO& io = ImGui::GetIO();
uint64_t current_frame_time_ticks = rex::chrono::Clock::QueryHostTickCount();
io.DeltaTime =
float(double(current_frame_time_ticks - last_frame_time_ticks_) / frame_time_tick_frequency_);
if (!(io.DeltaTime > 0.0f) || current_frame_time_ticks < last_frame_time_ticks_) {
// For safety as Dear ImGui doesn't allow non-positive DeltaTime. Using the
// same default value as in the official samples.
io.DeltaTime = 1.0f / 60.0f;
}
last_frame_time_ticks_ = current_frame_time_ticks;
float physical_to_logical = float(window_->GetMediumDpi()) / float(window_->GetDpi());
io.DisplaySize.x = window_->GetActualPhysicalWidth() * physical_to_logical;
io.DisplaySize.y = window_->GetActualPhysicalHeight() * physical_to_logical;
ImGui::NewFrame();
assert_true(!IsDrawingDialogs());
dialog_loop_next_index_ = 0;
while (dialog_loop_next_index_ < dialogs_.size()) {
dialogs_[dialog_loop_next_index_++]->Draw();
}
dialog_loop_next_index_ = SIZE_MAX;
// Publish this frame's dialog input ownership: the ImGui capture flags
// (computed in NewFrame) conjoined with post-loop visibility, so a dialog
// hidden this frame (e.g. via its toggle hotkey) stops owning input
// immediately, whatever focus state ImGui still holds for its window.
bool any_dialog_visible = false;
for (ImGuiDialog* dialog : dialogs_) {
if (dialog->IsVisible()) {
any_dialog_visible = true;
break;
}
}
// Keyboard follows FOCUS, and in this ImGui version io.WantCaptureKeyboard
// alone is not focus - it is only true while a widget is actively engaged
// (InputText active, slider held, modal open). A focused-but-idle dialog
// window must still own the keyboard, like any focused desktop window, so
// OR in "some ImGui window holds focus" (a freshly opened dialog takes
// focus; clicking the game void releases it).
const bool keyboard_owned =
io.WantCaptureKeyboard || ImGui::IsWindowFocused(ImGuiFocusedFlags_AnyWindow);
PublishDialogInputOwnership(any_dialog_visible && io.WantCaptureMouse,
any_dialog_visible && keyboard_owned,
any_dialog_visible && io.WantTextInput);
ImGui::Render();
ImDrawData* draw_data = ImGui::GetDrawData();
if (draw_data) {
RenderDrawLists(draw_data, ui_draw_context);
}
if (reset_mouse_position_after_next_frame_) {
reset_mouse_position_after_next_frame_ = false;
io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
}
// Detaching is deferred if the last dialog is removed during drawing, perform
// it now if needed.
DetachIfLastDialogRemoved();
if (!dialogs_.empty()) {
// Repaint (and handle input) continuously if still active.
presenter_->RequestUIPaintFromUIThread();
}
}
void ImGuiDrawer::RenderDrawLists(ImDrawData* data, UIDrawContext& ui_draw_context) {
ImGuiIO& io = ImGui::GetIO();
immediate_drawer_->Begin(ui_draw_context, io.DisplaySize.x, io.DisplaySize.y);
for (int i = 0; i < data->CmdListsCount; ++i) {
const auto cmd_list = data->CmdLists[i];
ImmediateDrawBatch batch;
batch.vertices = reinterpret_cast<ImmediateVertex*>(cmd_list->VtxBuffer.Data);
batch.vertex_count = cmd_list->VtxBuffer.size();
batch.indices = cmd_list->IdxBuffer.Data;
batch.index_count = cmd_list->IdxBuffer.size();
immediate_drawer_->BeginDrawBatch(batch);
for (int j = 0; j < cmd_list->CmdBuffer.size(); ++j) {
const auto& cmd = cmd_list->CmdBuffer[j];
ImmediateDraw draw;
draw.primitive_type = ImmediatePrimitiveType::kTriangles;
draw.count = cmd.ElemCount;
draw.index_offset = cmd.IdxOffset;
draw.texture = reinterpret_cast<ImmediateTexture*>(cmd.GetTexID());
draw.scissor = true;
draw.scissor_left = cmd.ClipRect.x;
draw.scissor_top = cmd.ClipRect.y;
draw.scissor_right = cmd.ClipRect.z;
draw.scissor_bottom = cmd.ClipRect.w;
immediate_drawer_->Draw(draw);
}
immediate_drawer_->EndDrawBatch();
}
immediate_drawer_->End();
}
ImGuiIO& ImGuiDrawer::GetIO() {
ImGui::SetCurrentContext(internal_state_);
return ImGui::GetIO();
}
void ImGuiDrawer::OnKeyDown(KeyEvent& e) {
OnKey(e, true);
}
void ImGuiDrawer::OnKeyUp(KeyEvent& e) {
OnKey(e, false);
}
void ImGuiDrawer::OnKeyChar(KeyEvent& e) {
auto& io = GetIO();
// TODO(Triang3l): Accept the Unicode character.
unsigned int character = static_cast<unsigned int>(e.virtual_key());
if (character > 0 && character < 0x10000) {
io.AddInputCharacter(character);
e.set_handled(true);
}
}
void ImGuiDrawer::OnMouseDown(MouseEvent& e) {
SwitchToPhysicalMouseAndUpdateMousePosition(e);
auto& io = GetIO();
int button = -1;
switch (e.button()) {
case rex::ui::MouseEvent::Button::kLeft: {
button = 0;
break;
}
case rex::ui::MouseEvent::Button::kRight: {
button = 1;
break;
}
default: {
// Ignored.
break;
}
}
if (button >= 0 && button < std::size(io.MouseDown)) {
if (!io.MouseDown[button]) {
if (!ImGui::IsAnyMouseDown()) {
window_->CaptureMouse();
}
io.MouseDown[button] = true;
}
}
}
void ImGuiDrawer::OnMouseMove(MouseEvent& e) {
SwitchToPhysicalMouseAndUpdateMousePosition(e);
}
void ImGuiDrawer::OnMouseUp(MouseEvent& e) {
SwitchToPhysicalMouseAndUpdateMousePosition(e);
auto& io = GetIO();
int button = -1;
switch (e.button()) {
case rex::ui::MouseEvent::Button::kLeft: {
button = 0;
break;
}
case rex::ui::MouseEvent::Button::kRight: {
button = 1;
break;
}
default: {
// Ignored.
break;
}
}
if (button >= 0 && button < std::size(io.MouseDown)) {
if (io.MouseDown[button]) {
io.MouseDown[button] = false;
if (!ImGui::IsAnyMouseDown()) {
window_->ReleaseMouse();
}
}
}
}
void ImGuiDrawer::OnMouseWheel(MouseEvent& e) {
SwitchToPhysicalMouseAndUpdateMousePosition(e);
auto& io = GetIO();
io.MouseWheel += float(e.scroll_y()) / float(MouseEvent::kScrollPerDetent);
}
void ImGuiDrawer::OnTouchEvent(TouchEvent& e) {
auto& io = GetIO();
TouchEvent::Action action = e.action();
uint32_t pointer_id = e.pointer_id();
if (action == TouchEvent::Action::kDown) {
// The latest pointer needs to be controlling the ImGui mouse.
if (touch_pointer_id_ == TouchEvent::kPointerIDNone) {
// Switching from the mouse to touch input.
if (ImGui::IsAnyMouseDown()) {
std::memset(io.MouseDown, 0, sizeof(io.MouseDown));
window_->ReleaseMouse();
}
}
touch_pointer_id_ = pointer_id;
} else {
if (pointer_id != touch_pointer_id_) {
return;
}
}
UpdateMousePosition(e.x(), e.y());
if (action == TouchEvent::Action::kUp || action == TouchEvent::Action::kCancel) {
io.MouseDown[0] = false;
touch_pointer_id_ = TouchEvent::kPointerIDNone;
// Make sure that after a touch, the ImGui mouse isn't hovering over
// anything.
reset_mouse_position_after_next_frame_ = true;
} else {
io.MouseDown[0] = true;
reset_mouse_position_after_next_frame_ = false;
}
}
void ImGuiDrawer::ClearInput() {
auto& io = GetIO();
if (touch_pointer_id_ == TouchEvent::kPointerIDNone && ImGui::IsAnyMouseDown()) {
window_->ReleaseMouse();
}
io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
std::memset(io.MouseDown, 0, sizeof(io.MouseDown));
io.ClearInputKeys();
touch_pointer_id_ = TouchEvent::kPointerIDNone;
reset_mouse_position_after_next_frame_ = false;
}
void ImGuiDrawer::OnKey(KeyEvent& e, bool is_down) {
auto& io = GetIO();
const VirtualKey virtual_key = e.virtual_key();
if (auto imGuiKey = VirtualKeyToImGuiKey(virtual_key); imGuiKey) {
io.AddKeyEvent(*imGuiKey, is_down);
}
switch (virtual_key) {
case VirtualKey::kShift:
io.KeyShift = is_down;
break;
case VirtualKey::kControl:
io.KeyCtrl = is_down;
break;
case VirtualKey::kMenu:
// FIXME(Triang3l): Doesn't work in xenia-ui-window-demo.
io.KeyAlt = is_down;
break;
case VirtualKey::kLWin:
io.KeySuper = is_down;
break;
default:
break;
}
}
void ImGuiDrawer::UpdateMousePosition(float x, float y) {
auto& io = GetIO();
float physical_to_logical = float(window_->GetMediumDpi()) / float(window_->GetDpi());
io.MousePos.x = x * physical_to_logical;
io.MousePos.y = y * physical_to_logical;
}
void ImGuiDrawer::SwitchToPhysicalMouseAndUpdateMousePosition(const MouseEvent& e) {
if (touch_pointer_id_ != TouchEvent::kPointerIDNone) {
touch_pointer_id_ = TouchEvent::kPointerIDNone;
auto& io = GetIO();
std::memset(io.MouseDown, 0, sizeof(io.MouseDown));
// Nothing needs to be done regarding CaptureMouse and ReleaseMouse - all
// buttons as well as mouse capture have been released when switching to
// touch input, the mouse is never captured during touch input, and now
// resetting to no buttons down (therefore not capturing).
}
reset_mouse_position_after_next_frame_ = false;
UpdateMousePosition(float(e.x()), float(e.y()));
}
void ImGuiDrawer::DetachIfLastDialogRemoved() {
// IsDrawingDialogs() is also checked because in a situation of removing the
// only dialog, then adding a dialog, from within a dialog's Draw function,
// re-registering the ImGuiDrawer may result in ImGui being drawn multiple
// times in the current frame.
if (!dialogs_.empty() || IsDrawingDialogs()) {
return;
}
if (presenter_) {
presenter_->RemoveUIDrawerFromUIThread(this);
}
window_->RemoveInputListener(this);
// Clear all input since no input will be received anymore, and when the
// drawer becomes active again, it'd have an outdated input state otherwise
// which will be persistent until new events actualize individual input
// properties.
ClearInput();
// No dialogs left: nothing can own input until the drawer reattaches.
PublishDialogInputOwnership(false, false, false);
}
} // namespace ui
} // namespace rex
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