[Windows] Fix color picker on old versions of Windows 10.

Author: bruvzg

doc/classes/DisplayServer.xml

@@ -2592,10 +2592,10 @@
 			The display server supports initiating window drag and resize operations on demand. See [method window_start_drag] and [method window_start_resize].
 		</constant>
 		<constant name="FEATURE_SCREEN_EXCLUDE_FROM_CAPTURE" value="28" enum="Feature">
-			Display server supports [constant WINDOW_FLAG_EXCLUDE_FROM_CAPTURE] window flag.
+			Display server supports [constant WINDOW_FLAG_EXCLUDE_FROM_CAPTURE] window flag. [b]Windows, macOS[/b]
 		</constant>
 		<constant name="FEATURE_WINDOW_EMBEDDING" value="29" enum="Feature">
-			Display server supports embedding a window from another process. [b]Windows, Linux (X11)[/b]
+			Display server supports embedding a window from another process. [b]Windows, Linux (X11), macOS[/b]
 		</constant>
 		<constant name="FEATURE_NATIVE_DIALOG_FILE_MIME" value="30" enum="Feature">
 			Native file selection dialog supports MIME types as filters.
@@ -3123,7 +3123,7 @@
 		</constant>
 		<constant name="WINDOW_FLAG_EXCLUDE_FROM_CAPTURE" value="9" enum="WindowFlags">
 			Window is excluded from screenshots taken by [method screen_get_image], [method screen_get_image_rect], and [method screen_get_pixel].
-			[b]Note:[/b] This flag is implemented on macOS and Windows.
+			[b]Note:[/b] This flag is implemented on macOS and Windows (10, 20H1).
 			[b]Note:[/b] Setting this flag will prevent standard screenshot methods from capturing a window image, but does [b]NOT[/b] guarantee that other apps won't be able to capture an image. It should not be used as a DRM or security measure.
 		</constant>
 		<constant name="WINDOW_FLAG_POPUP_WM_HINT" value="10" enum="WindowFlags">

doc/classes/Window.xml

@@ -904,7 +904,7 @@
 		</constant>
 		<constant name="FLAG_EXCLUDE_FROM_CAPTURE" value="9" enum="Flags">
 			Windows is excluded from screenshots taken by [method DisplayServer.screen_get_image], [method DisplayServer.screen_get_image_rect], and [method DisplayServer.screen_get_pixel].
-			[b]Note:[/b] This flag is implemented on macOS and Windows.
+			[b]Note:[/b] This flag is implemented on macOS and Windows (10, 20H1).
 			[b]Note:[/b] Setting this flag will prevent standard screenshot methods from capturing a window image, but does [b]NOT[/b] guarantee that other apps won't be able to capture an image. It should not be used as a DRM or security measure.
 		</constant>
 		<constant name="FLAG_POPUP_WM_HINT" value="10" enum="Flags">

platform/windows/display_server_windows.cpp

@@ -149,8 +149,9 @@ bool DisplayServerWindows::has_feature(Feature p_feature) const {
 		case FEATURE_STATUS_INDICATOR:
 		case FEATURE_WINDOW_EMBEDDING:
 		case FEATURE_WINDOW_DRAG:
-		case FEATURE_SCREEN_EXCLUDE_FROM_CAPTURE:
 			return true;
+		case FEATURE_SCREEN_EXCLUDE_FROM_CAPTURE:
+			return (os_ver.dwBuildNumber >= 19041); // Fully supported on Windows 10 Vibranium R1 (2004)+ only, captured as black rect on older versions.
 		case FEATURE_EMOJI_AND_SYMBOL_PICKER:
 			return (os_ver.dwBuildNumber >= 17134); // Windows 10 Redstone 4 (1803)+ only.
 #ifdef ACCESSKIT_ENABLED

platform/windows/os_windows.cpp

@@ -639,7 +639,7 @@ String OS_Windows::get_version_alias() const {
 			} else {
 				windows_string += "Unknown";
 			}
-			// Windows versions older than 7 cannot run Godot.
+			// Windows versions older than 10 cannot run Godot.
 
 			return vformat("%s (build %d)", windows_string, (int64_t)fow.dwBuildNumber);
 		}