UI: Massive revamp, new features and improvements

src/frontend-common/imgui_manager.h

@@ -0,0 +1,91 @@
+/*  PCSX2 - PS2 Emulator for PCs
+ *  Copyright (C) 2002-2021  PCSX2 Dev Team
+ *
+ *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
+ *  of the GNU Lesser General Public License as published by the Free Software Found-
+ *  ation, either version 3 of the License, or (at your option) any later version.
+ *
+ *  PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ *  PURPOSE.  See the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along with PCSX2.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "common/types.h"
+#include <string>
+
+struct ImFont;
+
+union InputBindingKey;
+enum class GenericInputBinding : u8;
+
+namespace ImGuiManager {
+/// Sets the path to the font to use. Empty string means to use the default.
+void SetFontPath(std::string path);
+
+/// Sets the glyph range to use when loading fonts.
+void SetFontRange(const u16* range);
+
+/// Initializes ImGui, creates fonts, etc.
+bool Initialize();
+
+/// Frees all ImGui resources.
+void Shutdown();
+
+/// Updates internal state when the window is size.
+void WindowResized();
+
+/// Updates scaling of the on-screen elements.
+void UpdateScale();
+
+/// Call at the beginning of the frame to set up ImGui state.
+void NewFrame();
+
+/// Renders any on-screen display elements.
+void RenderOSD();
+
+/// Returns the scale of all on-screen elements.
+float GetGlobalScale();
+
+/// Returns true if fullscreen fonts are present.
+bool HasFullscreenFonts();
+
+/// Allocates/adds fullscreen fonts if they're not loaded.
+bool AddFullscreenFontsIfMissing();
+
+/// Returns the standard font for external drawing.
+ImFont* GetStandardFont();
+
+/// Returns the fixed-width font for external drawing.
+ImFont* GetFixedFont();
+
+/// Returns the medium font for external drawing, scaled by ImGuiFullscreen.
+/// This font is allocated on demand.
+ImFont* GetMediumFont();
+
+/// Returns the large font for external drawing, scaled by ImGuiFullscreen.
+/// This font is allocated on demand.
+ImFont* GetLargeFont();
+
+/// Called on the UI or CPU thread in response to mouse movement.
+void UpdateMousePosition(float x, float y);
+
+/// Called on the CPU thread in response to a mouse button press.
+/// Returns true if ImGui intercepted the event, and regular handlers should not execute.
+bool ProcessPointerButtonEvent(InputBindingKey key, float value);
+
+/// Called on the CPU thread in response to a mouse wheel movement.
+/// Returns true if ImGui intercepted the event, and regular handlers should not execute.
+bool ProcessPointerAxisEvent(InputBindingKey key, float value);
+
+/// Called on the CPU thread in response to a key press.
+/// Returns true if ImGui intercepted the event, and regular handlers should not execute.
+bool ProcessHostKeyEvent(InputBindingKey key, float value);
+
+/// Called on the CPU thread when any input event fires. Allows imgui to take over controller navigation.
+bool ProcessGenericInputEvent(GenericInputBinding key, float value);
+} // namespace ImGuiManager