public void PopulateDrawingVisual()
{
void Populate(DrawingContext drawingContext)
{
drawingContext.DrawLine(new Pen(Color.Red, 4), new Point(10, 20), new Point(100, 60));
drawingContext.DrawLine(new Pen(Color.Blue, 4), new Point(60, 100), new Point(20, 10));
drawingContext.DrawRectangle(new Brush(Color.Aqua), new Pen(Color.Black, 3),
new Rect(new Point(30, 30), new Point(80, 80)));
}
//write records into visual's content
var visual = new DrawingVisual(1);
var context = visual.RenderOpen();
Populate(context);
context.Close();
//write records into ContentChecker
var checker = new ContentChecker();
Populate(checker);
//read records from visual to checker and compare
checker.StartCheck();
visual.RenderContent(new RenderContext(checker, null));
}
public void PopulateDrawingVisualWithGlyphRun()
{
throw new System.Exception("DrawGlyphRun methods should be unified to a single one:" +
"void DrawGlyphRun(Brush foregroundBrush, GlyphRun glyphRun);" +
"Another overload should be removed," +
"and the text layout/hittest algorithm should be extracted to a proper place");
void Populate(DrawingContext drawingContext)
{
drawingContext.DrawGlyphRun(new Brush(Color.Black),
new GlyphRun("啊rABC", GUIStyle.Default.FontFamily, 24, FontStyle.Normal, FontWeight.Normal));
}
//write records into visual's content
var visual = new DrawingVisual(1);
var context = visual.RenderOpen();
Populate(context);
context.Close();
//write records into ContentChecker
var checker = new ContentChecker();
Populate(checker);
//read records from visual to checker and compare
checker.StartCheck();
visual.RenderContent(new RenderContext(checker, null));
}
internal static void DrawDrawingVisualToImage(out byte[] imageRawBytes,
int width, int height, DrawingVisual drawingVisual)
{
//convert geometries inside the drawingVisual's content to meshes stored in a MeshList with a BuiltinGeometryRenderer
MeshList meshList = new MeshList();
using BuiltinGeometryRenderer geometryRenderer = new BuiltinGeometryRenderer();
RenderContext renderContext = new RenderContext(geometryRenderer, meshList);
drawingVisual.RenderContent(renderContext);
//merge meshes in the MeshList to a MeshBuffer
MeshBuffer meshBuffer = new MeshBuffer();
meshBuffer.Clear();
meshBuffer.Init();
meshBuffer.Build(meshList);
//created a mesh IRenderer
Application.Init();
var window = Application.PlatformContext.CreateWindow(Point.Zero, new Size(100, 100),
WindowTypes.Hidden);
var renderer = Application.PlatformContext.CreateRenderer() as Win32OpenGLRenderer;//TEMP HACK
Debug.Assert(renderer != null, nameof(renderer) + " != null");
renderer.Init(window.Pointer, window.ClientSize);
//clear the canvas and draw mesh in the MeshBuffer with the mesh renderer
renderer.Clear(Color.White);
renderer.StartDrawMeshToImage(width, height);
imageRawBytes = renderer.DrawMeshToImage(width, height, meshBuffer.ShapeMesh, OpenGLMaterial.shapeMaterial);
renderer.EndDrawMeshToImage();
//clear native resources: window and IRenderer
renderer.ShutDown();
window.Close();
}
public void PopulateDrawingVisualWithFormattedText()
{
void Populate(DrawingContext drawingContext)
{
drawingContext.DrawText(new Brush(Color.Black),
new FormattedText(Point.Zero, "啊rABC", GUIStyle.Default.FontFamily, 24));
}
//write records into visual's content
var visual = new DrawingVisual(1);
var context = visual.RenderOpen();
Populate(context);
context.Close();
//write records into ContentChecker
var checker = new ContentChecker();
Populate(checker);
//read records from visual to checker and compare
checker.StartCheck();
visual.RenderContent(new RenderContext(checker, null));
}
