private void Draw(Bitmap bitmap, GeometryShader2D shader, Matrix4x4 transform)
{
var geometries = new List <IMarkGeometry>();
var border = (MarkGeometryRectangle)Boundary.Clone();
border.Stroke = Color.White;
border.Transform(transform);
geometries.Add(border);
// apply transformation to geometries
foreach (var line in Segments)
{
var geometry = ((IMarkGeometry)line.Clone());
geometry.Transform(transform);
geometries.Add(geometry);
}
// draw used cells in red
shader.Draw(
bitmap,
geometries
);
if (ChildrenExists)
{
NorthWest.Draw(bitmap, shader, transform);
NorthEast.Draw(bitmap, shader, transform);
SouthWest.Draw(bitmap, shader, transform);
SouthEast.Draw(bitmap, shader, transform);
}
}
public bool SaveImage(string filePath)
{
var bitmap = new Bitmap(
480, 480,
PixelFormat.Format24bppRgb
);
var shader = new GeometryShader2D();
shader.UpdateSettings(1, 1, Color.Red, Color.Green, Color.Transparent);
shader.Reset(bitmap, Color.Black);
var xScale = bitmap.Width / Boundary.Extents.Width;
var yScale = bitmap.Height / Boundary.Extents.Height;
// calculate transform
var transformationMatrix = GeometricArithmeticModule.CombineTransformations(
// centre geometries at origin before scaling
GeometricArithmeticModule.GetTranslationTransformationMatrix(
-Boundary.Extents.Centre.X,
-Boundary.Extents.Centre.Y
),
// scale geometries to fit the target bitmap
GeometricArithmeticModule.GetScalingTransformationMatrix(
xScale,
-yScale
),
// centre geometries in target bitmap
GeometricArithmeticModule.GetTranslationTransformationMatrix(
0.5 * bitmap.Width,
0.5 * bitmap.Height
)
);
Draw(bitmap, shader, transformationMatrix);
return(shader.WriteToFile(bitmap, filePath, PixelFormat.Format24bppRgb, 120, 120, GeometryShader2D.OptimisationSetting.Default));
}
