Added proper positions

2026-09-29 18:21:21 +00:00
parent 6a33670865
commit bf409c0c3c
87 changed files with 311 additions and 229 deletions
@@ -0,0 +1,86 @@
+---
+sessionId: session-260928-184444-1lki
+---
+
+# Requirements
+
+### Overview & Goals
+Fix the build error in `ZeroSpace.MapEditor/Services/MapBackground.cs` where invoking `new PlatformImage(buffer)` fails with compilation error `CS7036: There is no argument given that corresponds to the required parameter 'bitmap' of 'PlatformImage.PlatformImage(ICanvasResourceCreator, CanvasBitmap)'`.
+
+### Scope
+- **In Scope:**
+  - Fix the image instantiation logic in `ZeroSpace.MapEditor/Services/MapBackground.cs` to use `Microsoft.Maui.Graphics.Platform.PlatformImage.FromStream(buffer)`.
+  - Ensure compatibility with .NET MAUI Windows (`net10.0-windows10.0.19041.0`) and MacCatalyst (`net10.0-maccatalyst`).
+  - Verify project build and clean diagnostic status.
+- **Out of Scope:**
+  - Modifying the galaxy map raw asset or canvas drawing logic in `MapEditorPage.xaml.cs` and `MapEditorDrawable.cs`.
+  - Introducing external third-party image decoding dependencies.
+
+### Functional Requirements
+- `MapBackground.LoadAsync()` must asynchronously open `galaxymap.png` from app package assets, copy the stream into memory, and return a valid `Microsoft.Maui.Graphics.IImage` instance on supported platforms.
+- If the asset cannot be found or is loaded on an unsupported platform, `MapBackground.LoadAsync()` must catch the exception and return `null` without crashing the application.
+- `MapEditorPage` must continue to display the galaxy map background when enabled.
+
+### Non-Functional Requirements
+- Maintain zero build errors and zero warnings across all supported target frameworks.
+- Preserve memory stream behavior ensuring stream data remains accessible for lazy platform decoders.
+
+# Technical Design
+
+### Current Implementation
+In `ZeroSpace.MapEditor/Services/MapBackground.cs`:
+```csharp
+#if WINDOWS
+    return new Microsoft.Maui.Graphics.Platform.PlatformImage(buffer);
+#elif MACCATALYST
+    return new Microsoft.Maui.Graphics.Platform.PlatformImage(buffer);
+#else
+    return null;
+#endif
+```
+On Windows (`Microsoft.Maui.Graphics.Win2D`), `PlatformImage` has no single-parameter constructor accepting a `Stream`. Its constructor expects `(ICanvasResourceCreator, CanvasBitmap)` or `(byte[], ImageFormat)`.
+
+### Root Cause
+Directly calling the `PlatformImage` constructor with a `MemoryStream` is invalid in Microsoft.Maui.Graphics for Win2D. The supported API to construct an `IImage` from a `Stream` across all MAUI platforms is the static factory method `PlatformImage.FromStream(Stream, ImageFormat)`.
+
+### Key Decisions
+- **Decision:** Use `PlatformImage.FromStream(buffer)` instead of constructor invocation.
+  - **Rationale:** `PlatformImage.FromStream(Stream, ImageFormat)` is the standard Microsoft.Maui.Graphics API designed for stream-based image creation on both Windows and MacCatalyst platforms.
+
+### Proposed Changes
+- In `ZeroSpace.MapEditor/Services/MapBackground.cs`:
+  - Update lines 25–31 to invoke `Microsoft.Maui.Graphics.Platform.PlatformImage.FromStream(buffer)` under `#if WINDOWS || MACCATALYST`.
+  - Maintain the existing try-catch safety wrapper that returns `null` if loading fails.
+
+### File Structure
+- `ZeroSpace.MapEditor/Services/MapBackground.cs` (Modified: update image factory call)
+- `ZeroSpace.MapEditor/Views/MapEditorPage.xaml.cs` (Referenced: consumes `MapBackground.LoadAsync()`)
+
+# Testing
+
+### Validation Approach
+Verify that the compilation error `CS7036` is resolved and `ZeroSpace.MapEditor` builds successfully.
+
+### Key Scenarios
+- **Compilation Check:**
+  - Verify `ZeroSpace.MapEditor/Services/MapBackground.cs` with Rider code analysis to confirm zero compiler errors.
+  - Build `ZeroSpace.MapEditor.csproj` target framework `net10.0-windows10.0.19041.0`.
+- **Image Loading & Fallback Check:**
+  - Ensure `MapBackground.LoadAsync()` returns an `IImage` instance when `galaxymap.png` is available.
+  - Ensure exceptions during loading (e.g. missing asset) are handled cleanly and return `null`.
+
+# Delivery Steps
+
+### ✓ Step 1: Refactor image stream loading to use PlatformImage.FromStream in MapBackground
+`MapBackground.cs` compiles without CS7036 errors across target platforms by using the static factory method `PlatformImage.FromStream`.
+
+- Replace `new Microsoft.Maui.Graphics.Platform.PlatformImage(buffer)` with `Microsoft.Maui.Graphics.Platform.PlatformImage.FromStream(buffer)` in `ZeroSpace.MapEditor/Services/MapBackground.cs`.
+- Consolidate platform conditional directives `#if WINDOWS || MACCATALYST` (or use platform-agnostic graphics loading) while preserving graceful `null` fallback in the `catch` block and unsupported target platforms.
+- Ensure using directives for `Microsoft.Maui.Graphics.Platform` are properly configured.
+
+### ✓ Step 2: Verify compilation and image rendering integration
+`ZeroSpace.MapEditor` builds cleanly without diagnostics or runtime issues when loading raw background assets.
+
+- Run code analysis/diagnostics on `ZeroSpace.MapEditor/Services/MapBackground.cs` to confirm zero compilation errors and warnings.
+- Build the `ZeroSpace.MapEditor` project to ensure proper integration with `Microsoft.Maui.Controls` and `Microsoft.Maui.Graphics`.
+- Validate that `MapEditorPage.xaml.cs` successfully receives the `IImage` instance from `MapBackground.LoadAsync()` and invalidates the map canvas for rendering.