Add Microsoft Visio (.vsdx) document rendering support

.cspell.yaml

@@ -203,6 +203,7 @@ words:
   - Unclipped
   - unmasked
   - Unmasked
+  - unconsulted
   - unstroked
   - Unstroked
   - unduplicated
@@ -360,6 +361,11 @@ words:
   - precomputes
   - uncontained
   - prst
+  - AIRttt
+  - AIRuuu
+  - Lucidchart
+  - lucidchart
+  - borderless
 
 # Exclude common build artifacts, dependencies, and vendored third-party code
 ignorePaths:

.reviewmark.yaml

@@ -1001,6 +1001,65 @@ reviews:
       - "test/DemaConsulting.CanvasNet.Charts.Tests/OpenXmlChartParserTests.cs"  # unit tests
       - "test/DemaConsulting.CanvasNet.Charts.Tests/OpenXmlChartFixtures/README.md"  # fixture provenance
 
+  # CanvasNetVsdx-Architecture Review (one per system)
+  - id: CanvasNetVsdx-Architecture
+    title: Review that CanvasNetVsdx Architecture Satisfies Requirements
+    context:
+      - "README.md"
+      - "docs/user_guide/**/*.md"
+    paths:
+      - "docs/reqstream/canvas-net-vsdx.yaml"                         # system requirements
+      - "docs/design/introduction.md"                                 # design introduction
+      - "docs/design/canvas-net-vsdx.md"                              # system design
+      - "docs/verification/introduction.md"                           # verification introduction
+      - "docs/verification/canvas-net-vsdx.md"                        # system verification
+
+  # CanvasNetVsdx-Design Review (one per system)
+  - id: CanvasNetVsdx-Design
+    title: Review that CanvasNetVsdx Design is Consistent and Complete
+    context:
+      - "docs/reqstream/canvas-net-vsdx.yaml"
+    paths:
+      - "docs/reqstream/canvas-net-vsdx/platform-requirements.yaml"   # platform requirements
+      - "docs/design/introduction.md"                                 # design introduction
+      - "docs/design/canvas-net-vsdx.md"                              # system design
+      - "docs/design/canvas-net-vsdx/**/*.md"                         # all system design documents
+
+  # CanvasNetVsdx-Verification Review (one per system)
+  - id: CanvasNetVsdx-Verification
+    title: Review that CanvasNetVsdx Verification is Consistent and Complete
+    context:
+      - "docs/reqstream/canvas-net-vsdx.yaml"
+    paths:
+      - "docs/verification/introduction.md"                           # verification introduction
+      - "docs/verification/canvas-net-vsdx.md"                        # system verification
+      - "docs/verification/canvas-net-vsdx/**/*.md"                   # all verification documents
+
+  # CanvasNetVsdx-AllRequirements Review (one per system)
+  - id: CanvasNetVsdx-AllRequirements
+    title: Review that All CanvasNetVsdx Requirements are Complete
+    context:
+      - "docs/design/canvas-net-vsdx.md"
+      - "docs/reqstream/canvas-net-vsdx.yaml"
+    paths:
+      - "docs/reqstream/canvas-net-vsdx/**/*.yaml"                    # all requirements files
+
+  # CanvasNetVsdx-VsdxDocument Review (one per direct unit)
+  - id: CanvasNetVsdx-VsdxDocument
+    title: Review that CanvasNetVsdx VsdxDocument Implementation is Correct
+    context:
+      - "docs/design/canvas-net-vsdx.md"
+      - "docs/reqstream/canvas-net-vsdx.yaml"
+    paths:
+      - "docs/reqstream/canvas-net-vsdx/vsdx-document.yaml"           # unit requirements
+      - "docs/design/canvas-net-vsdx/vsdx-document.md"                # unit design
+      - "docs/verification/canvas-net-vsdx/vsdx-document.md"          # unit verification
+      - "docs/sysml2/model/canvas-net-vsdx/vsdx-document.sysml"       # unit SysML2 model
+      - "src/DemaConsulting.CanvasNet.Vsdx/**/*.cs"                    # unit source
+      - "src/DemaConsulting.CanvasNet.Vsdx/DemaConsulting.CanvasNet.Vsdx.csproj"  # project file
+      - "test/DemaConsulting.CanvasNet.Vsdx.Tests/**/*.cs"             # unit/integration tests
+      - "test/DemaConsulting.CanvasNet.Vsdx.Tests/VsdxFixtures/**"      # fixture corpus (promoted)
+
   # OTS-BuildMark Review (one per OTS item)
   - id: OTS-BuildMark
     title: Review that BuildMark Provides Required Functionality

CanvasNet.slnx

@@ -4,13 +4,15 @@
     <Project Path="src/DemaConsulting.CanvasNet.Svg/DemaConsulting.CanvasNet.Svg.csproj" />
     <Project Path="src/DemaConsulting.CanvasNet.Pdf/DemaConsulting.CanvasNet.Pdf.csproj" />
     <Project Path="src/DemaConsulting.CanvasNet.Pptx/DemaConsulting.CanvasNet.Pptx.csproj" />
+    <Project Path="src/DemaConsulting.CanvasNet.Vsdx/DemaConsulting.CanvasNet.Vsdx.csproj" />
     <Project Path="src/DemaConsulting.CanvasNet.Charts/DemaConsulting.CanvasNet.Charts.csproj" />
   </Folder>
   <Folder Name="/test/">
     <Project Path="test/DemaConsulting.CanvasNet.Tests/DemaConsulting.CanvasNet.Tests.csproj" />
     <Project Path="test/DemaConsulting.CanvasNet.Svg.Tests/DemaConsulting.CanvasNet.Svg.Tests.csproj" />
     <Project Path="test/DemaConsulting.CanvasNet.Pdf.Tests/DemaConsulting.CanvasNet.Pdf.Tests.csproj" />
     <Project Path="test/DemaConsulting.CanvasNet.Pptx.Tests/DemaConsulting.CanvasNet.Pptx.Tests.csproj" />
+    <Project Path="test/DemaConsulting.CanvasNet.Vsdx.Tests/DemaConsulting.CanvasNet.Vsdx.Tests.csproj" />
     <Project Path="test/DemaConsulting.CanvasNet.Charts.Tests/DemaConsulting.CanvasNet.Charts.Tests.csproj" />
   </Folder>
 </Solution>

README.md

@@ -1,6 +1,6 @@
 # CanvasNet
 
-<!-- cspell:ignore SFNT codepoints Noto Zapf -->
+<!-- cspell:ignore SFNT codepoints Noto Zapf Visio -->
 <!-- IMPORTANT: All links in this file must be absolute URLs.
      This file is distributed in packages and relative links will not resolve. -->
 
@@ -50,6 +50,10 @@ image operations using `Span<T>`, and supports independent-copy cropping for loa
   separate `DemaConsulting.CanvasNet.Pptx` package's `PptxDocument.Render`, an embedded
   `<p:graphicFrame>` chart is automatically parsed and painted using this same package, with no
   extra caller code required.
+- 📊 **Visio (.vsdx) Diagram Rendering** - Open a Microsoft Visio `.vsdx` package, inspect its page
+  count/size, and rasterize a page's shape geometry (including Master/stencil inheritance,
+  StyleSheet-resolved line/fill/text styles, connectors/glue points with arrowheads, nested
+  groups, and text) to a surface (ships as the separate `DemaConsulting.CanvasNet.Vsdx` package)
 - 🔍 **Header-Only Probing** - `GetInfo` reads headers without decoding pixels (GIF excepted)
 - 🖌️ **Path Filling** - Antialiased nonzero/even-odd fill of vector paths
 - 🖊️ **Stroke-to-Fill** - Convert stroked paths into fillable outlines
@@ -128,6 +132,19 @@ Or via Package Manager Console:
 Install-Package DemaConsulting.CanvasNet.Pptx
 ```
 
+Visio (`.vsdx`) diagram parsing and rendering requires the separate
+`DemaConsulting.CanvasNet.Vsdx` package:
+
+```bash
+dotnet add package DemaConsulting.CanvasNet.Vsdx
+```
+
+Or via Package Manager Console:
+
+```powershell
+Install-Package DemaConsulting.CanvasNet.Vsdx
+```
+
 ## Usage
 
 ```csharp