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Implement full canvas compositing and redraw only on state change

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Stone_Red
2026-06-08 13:03:44 +02:00
parent 2ba87a113d
commit 930a0f6a5d
5 changed files with 139 additions and 43 deletions
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UI/GUI/Rendering/CanvasRenderSource.cs
+59 -16
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@@ -1,57 +1,102 @@
using System;
using System.Drawing;
using System.Collections.Generic;
using Cosmos.Kernel.System.Graphics;
namespace RemSox.UI.GUI.Rendering;
public sealed class CanvasRenderSource : IRenderSource
{
private static readonly Dictionary<int, Canvas> windowCanvases = new();
private static readonly Dictionary<int, Point> windowPositions = new();
public void Render(IEnumerable<RenderCommand> commands)
{
Canvas canvas = FullScreenCanvas.GetFullScreenCanvas();
foreach (RenderCommand command in commands)
{
if (command.ElementType == "Window")
{
RenderWindow(canvas, command);
Size size = command.Properties.TryGetValue("Size", out object? rawSize) && rawSize is Size windowSize
? windowSize
: new Size(160, 120);
if (!windowCanvases.TryGetValue(command.WindowId, out Canvas? currentCanvas) ||
currentCanvas.Mode.Width != size.Width ||
currentCanvas.Mode.Height != size.Height)
{
windowCanvases[command.WindowId] = new Canvas(size.Width, size.Height);
}
}
if (!windowCanvases.ContainsKey(command.WindowId))
{
windowCanvases[command.WindowId] = new Canvas(160, 120);
}
Canvas windowCanvas = windowCanvases[command.WindowId];
if (command.ElementType == "Window")
{
RenderWindow(windowCanvas, command);
windowPositions[command.WindowId] = command.Position;
continue;
}
if (command.ElementType == "WindowMove")
{
windowPositions[command.WindowId] = command.Position;
continue;
}
if (command.ElementType == "Circle")
{
RenderCircle(canvas, command);
RenderCircle(windowCanvas, command);
}
}
}
public static void CompositeAndDisplay(Canvas screenCanvas, Point pointerPosition)
{
screenCanvas.Clear(Color.Black);
foreach (var kvp in windowPositions)
{
int windowId = kvp.Key;
Point position = kvp.Value;
if (windowCanvases.TryGetValue(windowId, out Canvas? windowCanvas))
{
screenCanvas.DrawCanvas(windowCanvas, position.X, position.Y);
}
}
screenCanvas.DrawFilledCircle(Color.White, pointerPosition.X, pointerPosition.Y, 5);
screenCanvas.Display();
}
private static void RenderWindow(Canvas canvas, RenderCommand command)
{
int x = command.Position.X;
int y = command.Position.Y;
Size size = command.Properties.TryGetValue(nameof(Size), out object? rawSize) && rawSize is Size windowSize
Size size = command.Properties.TryGetValue("Size", out object? rawSize) && rawSize is Size windowSize
? windowSize
: new Size(160, 120);
bool isFocused = command.Properties.TryGetValue(nameof(Windows.Window.IsFocused), out object? rawFocused) && rawFocused is bool focused && focused;
bool isFocused = command.Properties.TryGetValue("IsFocused", out object? rawFocused) && rawFocused is bool focused && focused;
Color borderColor = isFocused ? Color.White : Color.DarkGray;
Color bodyColor = Color.FromArgb(32, 32, 32);
Color titleColor = isFocused ? Color.FromArgb(0, 120, 215) : Color.FromArgb(80, 80, 80);
canvas.DrawFilledRectangle(bodyColor, x, y, size.Width, size.Height);
canvas.DrawFilledRectangle(titleColor, x, y, size.Width, 18);
canvas.DrawRectangle(borderColor, x, y, size.Width, size.Height);
canvas.DrawFilledRectangle(bodyColor, 0, 0, size.Width, size.Height);
canvas.DrawFilledRectangle(titleColor, 0, 0, size.Width, 18);
canvas.DrawRectangle(borderColor, 0, 0, size.Width, size.Height);
}
private static void RenderCircle(Canvas canvas, RenderCommand command)
{
Color color = command.Properties.TryGetValue(nameof(Color), out object? rawColor) && rawColor is Color circleColor
Color color = command.Properties.TryGetValue("Color", out object? rawColor) && rawColor is Color circleColor
? circleColor
: Color.White;
int radius = command.Properties.TryGetValue(nameof(Radius), out object? rawRadius) && rawRadius is int circleRadius
int radius = command.Properties.TryGetValue("Radius", out object? rawRadius) && rawRadius is int circleRadius
? circleRadius
: 10;
@@ -60,6 +105,4 @@ public sealed class CanvasRenderSource : IRenderSource
canvas.DrawFilledCircle(color, centerX, centerY, radius);
}
private static string Radius => nameof(Radius);
}