mirror of
https://git.ryujinx.app/projects/Kenji-NX.git
synced 2026-09-20 17:51:13 +02:00
LotP
e3ee28605d
General memory improvements to decrease GC pressure and frequency. Pool big arrays and objects that are created and deleted often. Skip data copies when they aren't needed. Inline flag checks to skip unneeded allocations. From my testing the performance is about the same, but the GC frequency is much lower and collection is faster causing less and smaller spikes.
108 lines
3.6 KiB
C#
108 lines
3.6 KiB
C#
using System.Buffers;
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using System.Drawing;
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using System.Numerics;
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namespace Ryujinx.Input
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{
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/// <summary>
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/// Represent an emulated mouse.
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/// </summary>
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public interface IMouse : IGamepad
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{
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#pragma warning disable IDE0051 // Remove unused private member
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private const int SwitchPanelWidth = 1280;
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#pragma warning restore IDE0051
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private const int SwitchPanelHeight = 720;
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/// <summary>
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/// Check if a given button is pressed on the mouse.
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/// </summary>
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/// <param name="button">The button</param>
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/// <returns>True if the given button is pressed on the mouse</returns>
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bool IsButtonPressed(MouseButton button);
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/// <summary>
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/// Get the position of the mouse in the client.
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/// </summary>
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Vector2 GetPosition();
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/// <summary>
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/// Get the mouse scroll delta.
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/// </summary>
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Vector2 GetScroll();
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/// <summary>
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/// Get the client size.
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/// </summary>
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Size ClientSize { get; }
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/// <summary>
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/// Get the button states of the mouse.
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/// </summary>
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bool[] Buttons { get; }
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/// <summary>
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/// Get a snaphost of the state of a mouse.
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/// </summary>
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/// <param name="mouse">The mouse to do a snapshot of</param>
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/// <returns>A snaphost of the state of the mouse.</returns>
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public static MouseStateSnapshot GetMouseStateSnapshot(IMouse mouse)
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{
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bool[] buttons = ArrayPool<bool>.Shared.Rent((int)MouseButton.Count);
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mouse.Buttons.CopyTo(buttons, 0);
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return new MouseStateSnapshot(buttons, mouse.GetPosition(), mouse.GetScroll());
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}
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/// <summary>
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/// Get the position of a mouse on screen relative to the app's view
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/// </summary>
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/// <param name="mousePosition">The position of the mouse in the client</param>
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/// <param name="clientSize">The size of the client</param>
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/// <param name="aspectRatio">The aspect ratio of the view</param>
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/// <returns>A snaphost of the state of the mouse.</returns>
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public static Vector2 GetScreenPosition(Vector2 mousePosition, Size clientSize, float aspectRatio)
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{
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float mouseX = mousePosition.X;
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float mouseY = mousePosition.Y;
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float aspectWidth = SwitchPanelHeight * aspectRatio;
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int screenWidth = clientSize.Width;
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int screenHeight = clientSize.Height;
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if (clientSize.Width > clientSize.Height * aspectWidth / SwitchPanelHeight)
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{
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screenWidth = (int)(clientSize.Height * aspectWidth) / SwitchPanelHeight;
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}
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else
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{
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screenHeight = (clientSize.Width * SwitchPanelHeight) / (int)aspectWidth;
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}
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int startX = (clientSize.Width - screenWidth) >> 1;
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int startY = (clientSize.Height - screenHeight) >> 1;
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int endX = startX + screenWidth;
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int endY = startY + screenHeight;
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if (mouseX >= startX &&
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mouseY >= startY &&
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mouseX < endX &&
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mouseY < endY)
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{
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int screenMouseX = (int)mouseX - startX;
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int screenMouseY = (int)mouseY - startY;
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mouseX = (screenMouseX * (int)aspectWidth) / screenWidth;
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mouseY = (screenMouseY * SwitchPanelHeight) / screenHeight;
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return new Vector2(mouseX, mouseY);
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}
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return new Vector2();
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}
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}
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}
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