mirror of
https://github.com/riegera2412/UVtools.git
synced 2026-07-09 10:02:32 +02:00
Bryce Yancey
988d33eba5
*(Add)- Support for color cursors via CursorResourceLoader The built-in Cursor class has a limitation that prevents it from supporting color or greyscale cursors. Loading anything other than a 2-bit cursor will result in an all-black cursor. Added a CursorResourceLoader class to work around this issue. *(Add) Utilized CursorResourceLoader to load a custom 'pencil' cursor for the pixel edit mode. *(Add) Option to the settings dialog to allow the preview layer tooltips for select, ROI, and edit pixel mode to be hidden.
135 lines
4.2 KiB
C#
135 lines
4.2 KiB
C#
/*
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* GNU AFFERO GENERAL PUBLIC LICENSE
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* Version 3, 19 November 2007
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* Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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* Everyone is permitted to copy and distribute verbatim copies
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* of this license document, but changing it is not allowed.
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*/
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using System;
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using System.Runtime.InteropServices;
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using System.Windows.Forms;
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namespace UVtools.Core.Extensions
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{
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/*
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* Original code for CursoResourceLoader from:
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*
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* https://psycodedeveloper.wordpress.com/2013/05/26/how-to-load-an-embedded-cursor-from-resources-in-c-windows-forms/
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*
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*/
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public static class CursorResourceLoader
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{
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#region Methods
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public static Cursor LoadEmbeddedCursor(byte[] cursorResource, int imageIndex = 0)
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{
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var resourceHandle = GCHandle.Alloc(cursorResource, GCHandleType.Pinned);
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var iconImage = IntPtr.Zero;
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var cursorHandle = IntPtr.Zero;
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try
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{
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var header = (IconHeader)Marshal.PtrToStructure(resourceHandle.AddrOfPinnedObject(), typeof(IconHeader));
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if (imageIndex >= header.count)
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throw new ArgumentOutOfRangeException("imageIndex");
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var iconInfoPtr = resourceHandle.AddrOfPinnedObject() + Marshal.SizeOf(typeof(IconHeader)) + imageIndex * Marshal.SizeOf(typeof(IconInfo));
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var info = (IconInfo)Marshal.PtrToStructure(iconInfoPtr, typeof(IconInfo));
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iconImage = Marshal.AllocHGlobal(info.size + 4);
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Marshal.WriteInt16(iconImage + 0, info.hotspot_x);
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Marshal.WriteInt16(iconImage + 2, info.hotspot_y);
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Marshal.Copy(cursorResource, info.offset, iconImage + 4, info.size);
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cursorHandle = NativeMethods.CreateIconFromResource(iconImage, info.size + 4, false, 0x30000);
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return new Cursor(cursorHandle);
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}
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finally
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{
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if (cursorHandle != IntPtr.Zero)
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NativeMethods.DestroyIcon(cursorHandle);
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if (iconImage != IntPtr.Zero)
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Marshal.FreeHGlobal(iconImage);
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if (resourceHandle.IsAllocated)
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resourceHandle.Free();
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}
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}
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#endregion Methods
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#region Native Methods
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static class NativeMethods
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{
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[DllImportAttribute("user32.dll", CharSet = CharSet.Unicode)]
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[return: MarshalAs(UnmanagedType.Bool)]
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public static extern bool DestroyIcon(IntPtr hIcon);
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[DllImport("user32.dll", SetLastError = true)]
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public static extern IntPtr CreateIconFromResource(IntPtr pbIconBits, int dwResSize, bool fIcon, int dwVer);
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}
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#endregion Native Methods
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#region Native Structures
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[StructLayout(LayoutKind.Explicit, Pack = 1)]
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struct IconHeader
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{
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[FieldOffset(0)]
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public short reserved;
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[FieldOffset(2)]
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public short type;
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[FieldOffset(4)]
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public short count;
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}
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/// <summary>Union structure for icons and cursors.</summary>
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/// <remarks>For icons, field offset 4 is used for planes and field offset 6 for
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/// bits-per-pixel, while for cursors field offset 4 is used for the x coordinate
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/// of the hotspot, and field offset 6 is used for the y coordinate.</remarks>
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[StructLayout(LayoutKind.Explicit, Pack = 1)]
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struct IconInfo
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{
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[FieldOffset(0)]
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public byte width;
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[FieldOffset(1)]
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public byte height;
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[FieldOffset(2)]
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public byte colors;
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[FieldOffset(3)]
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public byte reserved;
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[FieldOffset(4)]
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public short planes;
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[FieldOffset(6)]
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public short bpp;
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[FieldOffset(4)]
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public short hotspot_x;
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[FieldOffset(6)]
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public short hotspot_y;
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[FieldOffset(8)]
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public int size;
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[FieldOffset(12)]
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public int offset;
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}
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#endregion Native Structures
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}
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}
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