Use logo as an icon in Linux windows

Source/Engine/Platform/SDL/SDLPlatform.cpp

@@ -50,10 +50,12 @@ bool SDLPlatform::Init()
 #endif
 
 #if PLATFORM_LINUX
-    // TODO: This should be read from the platform configuration (needed for desktop icon handling)
+    // The name follows the .desktop entry specification, this is used to get a fallback icon on Wayland:
+    // https://specifications.freedesktop.org/desktop-entry-spec/latest/file-naming.html
 #if USE_EDITOR
     SDL_SetHint(SDL_HINT_APP_ID, StringAnsi("com.FlaxEngine.FlaxEditor").Get());
 #else
+    // TODO: This should be read from the platform configuration (needed for desktop icon handling)
     SDL_SetHint(SDL_HINT_APP_ID, StringAnsi("com.FlaxEngine.FlaxGame").Get());
 #endif
 #else

Source/Engine/Platform/SDL/SDLWindow.cpp

@@ -5,16 +5,23 @@
 #include "SDLWindow.h"
 #include "SDLInput.h"
 #include "Engine/Core/Log.h"
+#include "Engine/Core/Math/Color32.h"
 #include "Engine/Core/Math/Math.h"
 #include "Engine/Core/Math/Rectangle.h"
-#include "Engine/Engine/Engine.h"
+#include "Engine/Engine/Globals.h"
 #include "Engine/Graphics/GPUDevice.h"
 #include "Engine/Graphics/GPUSwapChain.h"
 #include "Engine/Graphics/RenderTask.h"
+#include "Engine/Graphics/Textures/TextureData.h"
 #include "Engine/Input/Input.h"
 #include "Engine/Input/Keyboard.h"
 #include "Engine/Input/Mouse.h"
+#include "Engine/Platform/FileSystem.h"
 #include "Engine/Platform/WindowsManager.h"
+#if PLATFORM_LINUX
+#define COMPILE_WITH_TEXTURE_TOOL 1 // FIXME
+#include "Engine/Tools/TextureTool/TextureTool.h"
+#endif
 
 #define NOGDI
 #include <SDL3/SDL_events.h>
@@ -212,6 +219,27 @@ SDLWindow::SDLWindow(const CreateWindowSettings& settings)
     if (SDLPlatform::UsesX11() && _settings.AllowInput)
         SDL_StartTextInput(_window);
 #endif
+
+#if PLATFORM_LINUX && COMPILE_WITH_TEXTURE_TOOL
+    // Ensure windows other than the main window have some kind of icon
+    static SDL_Surface* surface = nullptr;
+    static Array<Color32> colorData;
+    if (surface == nullptr)
+    {
+        const String iconPath = Globals::BinariesFolder / TEXT("Logo.png");
+        if (FileSystem::FileExists(iconPath))
+        {
+            TextureData icon;
+            if (!TextureTool::ImportTexture(iconPath, icon))
+            {
+                icon.GetPixels(colorData);
+                surface = SDL_CreateSurfaceFrom(icon.Width, icon.Height, SDL_PIXELFORMAT_ABGR8888, colorData.Get(), sizeof(Color32) * icon.Width);
+            }
+        }
+    }
+    if (surface != nullptr)
+        SDL_SetWindowIcon(_window, surface);
+#endif
 }
 
 SDL_Window* SDLWindow::GetSDLWindow() const
@@ -966,5 +994,15 @@ void SDLWindow::UpdateCursor()
     SDL_SetCursor(Cursors[index]);
 }
 
+void SDLWindow::SetIcon(TextureData& icon)
+{
+    Array<Color32> colorData;
+    icon.GetPixels(colorData);
+    SDL_Surface* surface = SDL_CreateSurfaceFrom(icon.Width, icon.Height, SDL_PIXELFORMAT_ABGR8888, colorData.Get(), sizeof(Color32) * icon.Width);
+
+    SDL_SetWindowIcon(_window, surface);
+    SDL_free(surface);
+}
+
 #endif
 

Source/Engine/Platform/SDL/SDLWindow.h

@@ -106,6 +106,7 @@ public:
     void EndClippingCursor() override;
     void SetMousePosition(const Float2& position) const override;
     void SetCursor(CursorType type) override;
+    void SetIcon(TextureData& icon) override;
 
 #if USE_EDITOR && PLATFORM_WINDOWS
     // [IUnknown]