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@ -1,4 +1,4 @@ |
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using System; |
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using System; |
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using System.Collections.Generic; |
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using System.Collections.Generic; |
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using System.ComponentModel; |
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using System.ComponentModel; |
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using System.Diagnostics.CodeAnalysis; |
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using System.Diagnostics.CodeAnalysis; |
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@ -25,6 +25,7 @@ using Avalonia.Win32.WinRT.Composition; |
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using Avalonia.Win32.WinRT; |
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using Avalonia.Win32.WinRT; |
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using static Avalonia.Win32.Interop.UnmanagedMethods; |
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using static Avalonia.Win32.Interop.UnmanagedMethods; |
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using Avalonia.Input.Platform; |
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using Avalonia.Input.Platform; |
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using System.Diagnostics; |
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namespace Avalonia.Win32 |
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namespace Avalonia.Win32 |
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{ |
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{ |
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@ -346,82 +347,119 @@ namespace Avalonia.Win32 |
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return null; |
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return null; |
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} |
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} |
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public void SetTransparencyLevelHint(WindowTransparencyLevel transparencyLevel) |
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public void SetTransparencyLevelHint(IReadOnlyList<WindowTransparencyLevel> transparencyLevels) |
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{ |
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{ |
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TransparencyLevel = EnableBlur(transparencyLevel); |
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var windowsVersion = Win32Platform.WindowsVersion; |
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} |
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private WindowTransparencyLevel EnableBlur(WindowTransparencyLevel transparencyLevel) |
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foreach (var level in transparencyLevels) |
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{ |
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if (Win32Platform.WindowsVersion.Major >= 6) |
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{ |
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if (DwmIsCompositionEnabled(out var compositionEnabled) != 0 || !compositionEnabled) |
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{ |
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return WindowTransparencyLevel.None; |
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} |
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else if (Win32Platform.WindowsVersion.Major >= 10) |
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{ |
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return Win10EnableBlur(transparencyLevel); |
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} |
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else if (Win32Platform.WindowsVersion.Minor >= 2) |
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{ |
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return Win8xEnableBlur(transparencyLevel); |
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} |
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else |
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{ |
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return Win7EnableBlur(transparencyLevel); |
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} |
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} |
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else |
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{ |
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{ |
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return WindowTransparencyLevel.None; |
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if (!IsSupported(level, windowsVersion)) |
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continue; |
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if (level == WindowTransparencyLevel.Transparent) |
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SetTransparencyTransparent(windowsVersion); |
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else if (level == WindowTransparencyLevel.Blur) |
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SetTransparencyBlur(windowsVersion); |
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else if (level == WindowTransparencyLevel.AcrylicBlur) |
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SetTransparencyAcrylicBlur(windowsVersion); |
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else if (level == WindowTransparencyLevel.Mica) |
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SetTransparencyMica(windowsVersion); |
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TransparencyLevel = level; |
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break; |
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} |
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} |
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} |
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} |
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private WindowTransparencyLevel Win7EnableBlur(WindowTransparencyLevel transparencyLevel) |
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private bool IsSupported(WindowTransparencyLevel level, Version windowsVersion) |
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{ |
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{ |
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if (transparencyLevel == WindowTransparencyLevel.AcrylicBlur) |
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// Only None is suppported when composition is disabled.
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{ |
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if (!_isUsingComposition) |
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transparencyLevel = WindowTransparencyLevel.Blur; |
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return level == WindowTransparencyLevel.None; |
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} |
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// When composition is enabled, None is not supported because the backing visual always
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// has an alpha channel
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if (level == WindowTransparencyLevel.None) |
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return false; |
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// Transparent only supported on Windows 8+.
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if (level == WindowTransparencyLevel.Transparent) |
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return windowsVersion >= PlatformConstants.Windows8; |
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// Blur only supported on Windows 8 and lower.
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if (level == WindowTransparencyLevel.Blur) |
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return windowsVersion < PlatformConstants.Windows10; |
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// Acrylic is supported on Windows >= 10.0.15063.
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if (level == WindowTransparencyLevel.AcrylicBlur) |
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return windowsVersion >= WinUiCompositionShared.MinAcrylicVersion; |
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var blurInfo = new DWM_BLURBEHIND(false); |
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// Mica is supported on Windows >= 10.0.22000.
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if (level == WindowTransparencyLevel.Mica) |
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return windowsVersion >= WinUiCompositionShared.MinHostBackdropVersion; |
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if (transparencyLevel == WindowTransparencyLevel.Blur) |
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return false; |
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} |
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private void SetTransparencyTransparent(Version windowsVersion) |
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{ |
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// Transparent only supported with composition on Windows 8+.
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if (!_isUsingComposition || windowsVersion < PlatformConstants.Windows8) |
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return; |
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if (windowsVersion < PlatformConstants.Windows10) |
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{ |
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{ |
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blurInfo = new DWM_BLURBEHIND(true); |
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// Some of the AccentState Enum's values have different meanings on Windows 8.x than on
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// Windows 10, hence using ACCENT_ENABLE_BLURBEHIND to disable blurbehind ¯\_(ツ)_/¯.
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// Hey, I'm just porting what was here before.
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SetAccentState(AccentState.ACCENT_ENABLE_BLURBEHIND); |
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var blurInfo = new DWM_BLURBEHIND(false); |
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DwmEnableBlurBehindWindow(_hwnd, ref blurInfo); |
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} |
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} |
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SetUseHostBackdropBrush(false); |
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_blurHost?.SetBlur(BlurEffect.None); |
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} |
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private void SetTransparencyBlur(Version windowsVersion) |
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{ |
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// Blur only supported with composition on Windows 8 and lower.
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if (!_isUsingComposition || windowsVersion >= PlatformConstants.Windows10) |
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return; |
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// Some of the AccentState Enum's values have different meanings on Windows 8.x than on
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// Windows 10.
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SetAccentState(AccentState.ACCENT_DISABLED); |
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var blurInfo = new DWM_BLURBEHIND(true); |
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DwmEnableBlurBehindWindow(_hwnd, ref blurInfo); |
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DwmEnableBlurBehindWindow(_hwnd, ref blurInfo); |
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} |
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if (transparencyLevel == WindowTransparencyLevel.Transparent) |
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private void SetTransparencyAcrylicBlur(Version windowsVersion) |
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{ |
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{ |
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return WindowTransparencyLevel.None; |
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// Acrylic blur only supported with composition on Windows >= 10.0.15063.
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} |
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if (!_isUsingComposition || windowsVersion < WinUiCompositionShared.MinAcrylicVersion) |
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else |
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return; |
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{ |
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return transparencyLevel; |
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SetUseHostBackdropBrush(true); |
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} |
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_blurHost?.SetBlur(BlurEffect.Acrylic); |
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} |
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} |
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private WindowTransparencyLevel Win8xEnableBlur(WindowTransparencyLevel transparencyLevel) |
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private void SetTransparencyMica(Version windowsVersion) |
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{ |
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{ |
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var accent = new AccentPolicy(); |
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// Mica only supported with composition on Windows >= 10.0.22000.
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var accentStructSize = Marshal.SizeOf<AccentPolicy>(); |
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if (!_isUsingComposition || windowsVersion < WinUiCompositionShared.MinHostBackdropVersion) |
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return; |
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if (transparencyLevel == WindowTransparencyLevel.AcrylicBlur) |
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SetUseHostBackdropBrush(false); |
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{ |
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_blurHost?.SetBlur(BlurEffect.Mica); |
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transparencyLevel = WindowTransparencyLevel.Blur; |
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} |
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} |
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if (transparencyLevel == WindowTransparencyLevel.Transparent) |
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private void SetAccentState(AccentState state) |
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{ |
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{ |
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accent.AccentState = AccentState.ACCENT_ENABLE_BLURBEHIND; |
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var accent = new AccentPolicy(); |
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} |
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var accentStructSize = Marshal.SizeOf(accent); |
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else |
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{ |
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//Some of the AccentState Enum's values have different meanings on Windows 8.x than on Windows 10
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accent.AccentState = AccentState.ACCENT_DISABLED; |
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accent.AccentState = state; |
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} |
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var accentPtr = Marshal.AllocHGlobal(accentStructSize); |
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var accentPtr = Marshal.AllocHGlobal(accentStructSize); |
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Marshal.StructureToPtr(accent, accentPtr, false); |
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Marshal.StructureToPtr(accent, accentPtr, false); |
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@ -432,96 +470,18 @@ namespace Avalonia.Win32 |
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data.Data = accentPtr; |
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data.Data = accentPtr; |
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SetWindowCompositionAttribute(_hwnd, ref data); |
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SetWindowCompositionAttribute(_hwnd, ref data); |
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Marshal.FreeHGlobal(accentPtr); |
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Marshal.FreeHGlobal(accentPtr); |
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if (transparencyLevel == WindowTransparencyLevel.Blur || |
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transparencyLevel == WindowTransparencyLevel.AcrylicBlur || |
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transparencyLevel == WindowTransparencyLevel.Mica) |
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{ |
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Win7EnableBlur(transparencyLevel); |
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} |
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return transparencyLevel; |
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} |
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} |
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private WindowTransparencyLevel Win10EnableBlur(WindowTransparencyLevel transparencyLevel) |
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private void SetUseHostBackdropBrush(bool useHostBackdropBrush) |
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{ |
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{ |
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if (_isUsingComposition) |
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if (Win32Platform.WindowsVersion < WinUiCompositionShared.MinHostBackdropVersion) |
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{ |
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return; |
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BlurEffect effect; |
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if (transparencyLevel == WindowTransparencyLevel.Mica) |
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effect = BlurEffect.Mica; |
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else if (transparencyLevel == WindowTransparencyLevel.AcrylicBlur) |
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effect = BlurEffect.Acrylic; |
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else |
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effect = BlurEffect.None; |
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if (Win32Platform.WindowsVersion >= WinUiCompositionShared.MinHostBackdropVersion) |
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{ |
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{ |
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int pvUseBackdropBrush = effect == BlurEffect.Acrylic ? 1 : 0; |
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DwmSetWindowAttribute(_hwnd, (int)DwmWindowAttribute.DWMWA_USE_HOSTBACKDROPBRUSH, &pvUseBackdropBrush, sizeof(int)); |
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} |
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} |
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if (Win32Platform.WindowsVersion < WinUiCompositionShared.MinHostBackdropVersion && effect == BlurEffect.Mica) |
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{ |
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effect = BlurEffect.Acrylic; |
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} |
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_blurHost?.SetBlur(effect); |
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return transparencyLevel; |
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unsafe |
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} |
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else |
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{ |
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{ |
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bool canUseAcrylic = Win32Platform.WindowsVersion.Major > 10 || Win32Platform.WindowsVersion.Build >= 19628; |
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var pvUseBackdropBrush = useHostBackdropBrush ? 1 : 0; |
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DwmSetWindowAttribute(_hwnd, (int)DwmWindowAttribute.DWMWA_USE_HOSTBACKDROPBRUSH, &pvUseBackdropBrush, sizeof(int)); |
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var accent = new AccentPolicy(); |
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var accentStructSize = Marshal.SizeOf<AccentPolicy>(); |
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if (transparencyLevel == WindowTransparencyLevel.AcrylicBlur && !canUseAcrylic) |
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{ |
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transparencyLevel = WindowTransparencyLevel.Blur; |
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} |
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if (transparencyLevel == WindowTransparencyLevel.Transparent) |
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{ |
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accent.AccentState = AccentState.ACCENT_ENABLE_TRANSPARENTGRADIENT; |
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} |
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else if (transparencyLevel == WindowTransparencyLevel.Blur) |
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{ |
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accent.AccentState = AccentState.ACCENT_ENABLE_BLURBEHIND; |
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} |
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else if (transparencyLevel == WindowTransparencyLevel.AcrylicBlur || transparencyLevel == WindowTransparencyLevel.Mica) |
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{ |
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accent.AccentState = AccentState.ACCENT_ENABLE_ACRYLIC; |
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transparencyLevel = WindowTransparencyLevel.AcrylicBlur; |
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} |
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else |
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{ |
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accent.AccentState = AccentState.ACCENT_DISABLED; |
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} |
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accent.AccentFlags = 2; |
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accent.GradientColor = 0x01000000; |
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var accentPtr = Marshal.AllocHGlobal(accentStructSize); |
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Marshal.StructureToPtr(accent, accentPtr, false); |
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var data = new WindowCompositionAttributeData(); |
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data.Attribute = WindowCompositionAttribute.WCA_ACCENT_POLICY; |
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data.SizeOfData = accentStructSize; |
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data.Data = accentPtr; |
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SetWindowCompositionAttribute(_hwnd, ref data); |
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Marshal.FreeHGlobal(accentPtr); |
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return transparencyLevel; |
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} |
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} |
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} |
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} |
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Steven Kirk
3 years ago