91 lines
3.9 KiB
C#
91 lines
3.9 KiB
C#
using Gtk;
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using Ryujinx.HLE.UI;
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using System.Diagnostics;
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namespace Ryujinx.UI.Applet
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{
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internal class GtkHostUITheme : IHostUITheme
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{
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private const int RenderSurfaceWidth = 32;
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private const int RenderSurfaceHeight = 32;
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public string FontFamily { get; private set; }
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public ThemeColor DefaultBackgroundColor { get; }
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public ThemeColor DefaultForegroundColor { get; }
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public ThemeColor DefaultBorderColor { get; }
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public ThemeColor SelectionBackgroundColor { get; }
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public ThemeColor SelectionForegroundColor { get; }
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public GtkHostUITheme(Window parent)
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{
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Entry entry = new();
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entry.SetStateFlags(StateFlags.Selected, true);
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// Get the font and some colors directly from GTK.
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FontFamily = entry.PangoContext.FontDescription.Family;
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// Get foreground colors from the style context.
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var defaultForegroundColor = entry.StyleContext.GetColor(StateFlags.Normal);
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var selectedForegroundColor = entry.StyleContext.GetColor(StateFlags.Selected);
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DefaultForegroundColor = new ThemeColor((float)defaultForegroundColor.Alpha, (float)defaultForegroundColor.Red, (float)defaultForegroundColor.Green, (float)defaultForegroundColor.Blue);
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SelectionForegroundColor = new ThemeColor((float)selectedForegroundColor.Alpha, (float)selectedForegroundColor.Red, (float)selectedForegroundColor.Green, (float)selectedForegroundColor.Blue);
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ListBoxRow row = new();
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row.SetStateFlags(StateFlags.Selected, true);
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// Request the main thread to render some UI elements to an image to get an approximation for the color.
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// NOTE (caian): This will only take the color of the top-left corner of the background, which may be incorrect
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// if someone provides a custom style with a gradient or image.
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using (var surface = new Cairo.ImageSurface(Cairo.Format.Argb32, RenderSurfaceWidth, RenderSurfaceHeight))
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using (var context = new Cairo.Context(surface))
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{
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context.SetSourceRGBA(1, 1, 1, 1);
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context.Rectangle(0, 0, RenderSurfaceWidth, RenderSurfaceHeight);
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context.Fill();
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// The background color must be from the main Window because entry uses a different color.
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parent.StyleContext.RenderBackground(context, 0, 0, RenderSurfaceWidth, RenderSurfaceHeight);
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DefaultBackgroundColor = ToThemeColor(surface.Data);
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context.SetSourceRGBA(1, 1, 1, 1);
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context.Rectangle(0, 0, RenderSurfaceWidth, RenderSurfaceHeight);
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context.Fill();
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// Use the background color of the list box row when selected as the text box frame color because they are the
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// same in the default theme.
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row.StyleContext.RenderBackground(context, 0, 0, RenderSurfaceWidth, RenderSurfaceHeight);
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DefaultBorderColor = ToThemeColor(surface.Data);
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}
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// Use the border color as the text selection color.
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SelectionBackgroundColor = DefaultBorderColor;
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}
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private static ThemeColor ToThemeColor(byte[] data)
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{
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Debug.Assert(data.Length == 4 * RenderSurfaceWidth * RenderSurfaceHeight);
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// Take the center-bottom pixel of the surface.
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int position = 4 * (RenderSurfaceWidth * (RenderSurfaceHeight - 1) + RenderSurfaceWidth / 2);
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if (position + 4 > data.Length)
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{
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return new ThemeColor(1, 0, 0, 0);
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}
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float a = data[position + 3] / 255.0f;
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float r = data[position + 2] / 255.0f;
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float g = data[position + 1] / 255.0f;
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float b = data[position + 0] / 255.0f;
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return new ThemeColor(a, r, g, b);
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}
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}
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}
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