void MatrixTests(Graphics g)
{
// test matrix RotateAt
DrawRotatedLines(g, Colors.SkyBlue, rotatedLineCenter, (center, angle) => {
var m = Matrix.Create();
m.RotateAt(angle, center);
g.MultiplyTransform(m);
});
// test matrix scale/translate/rotate
DrawRotatedLines(g, Colors.Salmon, rotatedLineCenter, (center, angle) => {
var m = Matrix.Create();
m.Translate(center);
m.Rotate(angle);
m.Translate(-center);
m.Scale(.4f);
g.MultiplyTransform(m);
});
// test rotating arcs
DrawRotatedArcs(g, Colors.LightBlue, rotatedLineCenter, (center, angle) => {
var m = Matrix.Create();
m.RotateAt(angle, center);
g.MultiplyTransform(m);
});
// test transformed text
DrawRotatedText(g, Colors.Lime, rotatedTextCenter, (center, angle) => {
var m = Matrix.Create();
m.RotateAt(angle, center - 40);
g.MultiplyTransform(m);
});
// test image drawing
{
g.SaveTransform();
g.MultiplyTransform(Matrix.FromScaleAt(new SizeF(1, -1), imageScaleLocation + image.Size / 2));
g.DrawImage(image, imageScaleLocation);
var m = Matrix.Create();
m.Translate(0, -50);
m.ScaleAt(0.3f, imageScaleLocation + image.Size / 2);
g.MultiplyTransform(m);
g.DrawImage(image, imageScaleLocation);
g.RestoreTransform();
}
// test skewing
{
g.SaveTransform();
var m = Matrix.Create();
m.Skew(20, 20);
g.MultiplyTransform(m);
var textSize = g.MeasureString(font, "Skewed Text");
g.DrawText(font, Colors.White, new PointF(110, 0), "Skewed Text");
g.DrawLine(Pens.White, 110, textSize.Height + 2, 110 + textSize.Width, textSize.Height + 2);
g.RestoreTransform();
}
// test more drawing operations
{
g.SaveTransform();
var m = Matrix.Create();
m.Translate(480, 20);
m.Scale(0.4f);
m.Rotate(90);
g.MultiplyTransform(m);
PixelOffsetSection.Draw(g);
g.RestoreTransform();
}
}
Control DrawImageToRect()
{
var image64 = TestIcons.Textures;
var bitmap = new Bitmap(new Size(105, 105), PixelFormat.Format32bppRgba);
using (var g = new Graphics(bitmap))
{
// Draw the "5" portion of the texture at a smaller size at the origin.
g.DrawImage(image64, new RectangleF(80, 80, 80, 80), new RectangleF(0, 0, 32, 32));
// draw two rulers to indicate how big the green image should be
g.SaveTransform();
g.MultiplyTransform(Matrix.Create(1, 0, 0, 1, 0, 70));
DrawRuler(32, g, Colors.Blue);
g.RestoreTransform();
g.SaveTransform();
g.MultiplyTransform(Matrix.Create(0, 1, 1, 0, 70, 0));
DrawRuler(32, g, Colors.Blue);
g.RestoreTransform();
}
return new DrawableImageView { Image = bitmap };
}
void DirectTests(Graphics g)
{
// test translate/rotate
DrawRotatedLines(g, Colors.SkyBlue, rotatedLineCenter, (center, angle) => {
g.TranslateTransform(center);
g.RotateTransform(angle);
g.TranslateTransform(-center);
});
// test translate/rotate/scale
DrawRotatedLines(g, Colors.Salmon, rotatedLineCenter, (center, angle) => {
g.TranslateTransform(center);
g.RotateTransform(angle);
g.TranslateTransform(-center);
g.ScaleTransform(.4f);
});
// test rotating arcs
DrawRotatedArcs(g, Colors.LightBlue, rotatedLineCenter, (center, angle) => {
g.TranslateTransform(center);
g.RotateTransform(angle);
g.TranslateTransform(-center);
});
// test transformed text
DrawRotatedText(g, Colors.Lime, rotatedTextCenter, (center, angle) => {
g.TranslateTransform(center - 40);
g.RotateTransform(angle);
g.TranslateTransform(-center + 40);
});
// Test image drawing
g.SaveTransform();
g.TranslateTransform(imageScaleLocation + image.Size / 2);
g.ScaleTransform(1, -1);
g.TranslateTransform(-imageScaleLocation - image.Size / 2);
g.DrawImage(image, imageScaleLocation);
g.TranslateTransform(0, -50);
g.TranslateTransform(imageScaleLocation + image.Size / 2);
g.ScaleTransform(0.3f);
g.TranslateTransform(-imageScaleLocation - image.Size / 2);
g.DrawImage(image, imageScaleLocation);
g.RestoreTransform();
// test skewing
g.SaveTransform();
g.MultiplyTransform(Matrix.FromSkew(20, 20));
var textSize = g.MeasureString(font, "Skewed Text");
g.DrawText(font, Colors.White, new PointF(110, 0), "Skewed Text");
g.DrawLine(Pens.White, 110, textSize.Height + 2, 110 + textSize.Width, textSize.Height + 2);
g.RestoreTransform();
// test more drawing operations
g.SaveTransform();
g.TranslateTransform(480, 20);
g.ScaleTransform(0.4f);
g.RotateTransform(90);
PixelOffsetSection.Draw(g);
g.RestoreTransform();
}
public void Draw(Graphics graphics)
{
graphics.SaveTransform();
graphics.MultiplyTransform(transform);
draw(graphics);
graphics.RestoreTransform();
}
public void Erase(Graphics graphics)
{
if (transform != null)
{
graphics.SaveTransform();
graphics.MultiplyTransform(transform);
erase(graphics);
graphics.RestoreTransform();
}
}
Control DrawImageToRect()
{
var image64 = TestIcons.Textures;
var size = new Size(105, 105) * (int)Screen.PrimaryScreen.LogicalPixelSize;
var bitmap = new Bitmap(size, PixelFormat.Format32bppRgba);
using (var g = new Graphics(bitmap))
{
g.PixelOffsetMode = PixelOffsetMode.Half;
g.ScaleTransform(Screen.PrimaryScreen.LogicalPixelSize, Screen.PrimaryScreen.LogicalPixelSize);
// Draw the "5" portion of the texture at a smaller size at the origin.
g.DrawImage(image64, new RectangleF(80, 80, 80, 80), new RectangleF(0, 0, 32, 32));
// draw two rulers to indicate how big the green image should be
g.SaveTransform();
g.MultiplyTransform(Matrix.Create(1, 0, 0, 1, 0.5f, 70.5f));
DrawRuler(32, g, Colors.Blue);
g.RestoreTransform();
g.SaveTransform();
g.MultiplyTransform(Matrix.Create(0, 1, 1, 0, 70.5f, 0.5f));
DrawRuler(32, g, Colors.Blue);
g.RestoreTransform();
}
return new DrawableImageView { Image = new Icon(Screen.PrimaryScreen.LogicalPixelSize, bitmap) };
}
static void EllipseAndCurveTest(Graphics graphics)
{
var path = new GraphicsPath();
path.FillMode = FillMode.Winding;
path.AddBezier(new PointF(10f, 6f), new PointF(10f, 4f), new PointF(8f, 2f), new PointF(6f, 2f));
path.CloseFigure();
var m = Matrix.Create();
m.Scale(60f, 60f);
graphics.SaveTransform();
graphics.MultiplyTransform(m);
var brush = new SolidBrush(Colors.Black);
var pen = new Pen(Colors.Red, 0.1f);
graphics.FillPath(brush, path);
graphics.DrawPath(pen, path);
brush.Dispose();
pen.Dispose();
var brushY = new SolidBrush(Color.FromArgb(0xFF, 0xFF, 0x00, 0x9F));
var penB = new Pen(Color.FromArgb(0x00, 0x00, 0xFF, 0x9F), 0.1f);
graphics.DrawEllipse(penB, 10f, 6f, 0.5f, 0.5f);
graphics.FillEllipse(brushY, 10f, 6f, 0.5f, 0.5f);
graphics.DrawEllipse(penB, 6f, 2f, 0.5f, 0.5f);
graphics.FillEllipse(brushY, 6f, 2f, 0.5f, 0.5f);
graphics.RestoreTransform();
}
static void ScissorsTest(Graphics graphics)
{
var t = new
{
CenterX = 0f,
CenterY = 0f,
OffsetX = 200f,
OffsetY = 50f,
RotateAngle = 0f,
SkewAngleY = 10f,
SkewAngleX = 10f,
ScaleX = 16f,
ScaleY = 16f
};
var path = new GraphicsPath();
path.FillMode = FillMode.Winding;
// draw some scissors
path.AddBezier(new PointF(9.64f, 7.64f), new PointF(9.87f, 7.14f), new PointF(10f, 6.59f), new PointF(10f, 6f));
path.AddBezier(new PointF(10f, 6f), new PointF(10f, 3.79f), new PointF(8.21f, 2f), new PointF(6f, 2f));
path.AddBezier(new PointF(6f, 2f), new PointF(3.79f, 2f), new PointF(2f, 3.79f), new PointF(2f, 6f));
path.AddBezier(new PointF(2f, 6f), new PointF(2f, 8.21f), new PointF(3.79f, 10f), new PointF(6f, 10f));
path.AddBezier(new PointF(6f, 10f), new PointF(6.59f, 10f), new PointF(7.14f, 9.87f), new PointF(7.64f, 9.64f));
path.AddLine(7.64f, 9.64f, 10f, 12f);
path.AddLine(10f, 12f, 7.64f, 14.36f);
path.AddBezier(new PointF(7.64f, 14.36f), new PointF(7.14f, 14.13f), new PointF(6.59f, 14f), new PointF(6f, 14f));
path.AddBezier(new PointF(6f, 14f), new PointF(3.79f, 14f), new PointF(2f, 15.79f), new PointF(2f, 18f));
path.AddBezier(new PointF(2f, 18f), new PointF(2f, 20.21f), new PointF(3.79f, 22f), new PointF(6f, 22f));
path.AddBezier(new PointF(6f, 22f), new PointF(8.21f, 22f), new PointF(10f, 20.21f), new PointF(10f, 18f));
path.AddBezier(new PointF(10f, 18f), new PointF(10f, 17.41f), new PointF(9.87f, 16.86f), new PointF(9.64f, 16.36f));
path.AddLine(9.64f, 16.36f, 12f, 14f);
path.AddLine(12f, 14f, 19f, 21f);
path.AddLine(19f, 21f, 22f, 21f);
path.AddLine(22f, 21f, 22f, 20f);
path.AddLine(22f, 20f, 9.64f, 7.64f);
path.CloseFigure();
path.AddBezier(new PointF(6f, 8f), new PointF(4.9f, 8f), new PointF(4f, 7.11f), new PointF(4f, 6f));
path.AddBezier(new PointF(4f, 6f), new PointF(4f, 4.89f), new PointF(4.9f, 4f), new PointF(6f, 4f));
path.AddBezier(new PointF(6f, 4f), new PointF(7.1f, 4f), new PointF(8f, 4.89f), new PointF(8f, 6f));
path.AddBezier(new PointF(8f, 6f), new PointF(8f, 7.11f), new PointF(7.1f, 8f), new PointF(6f, 8f));
path.CloseFigure();
path.AddBezier(new PointF(6f, 20f), new PointF(4.9f, 20f), new PointF(4f, 19.11f), new PointF(4f, 18f));
path.AddBezier(new PointF(4f, 18f), new PointF(4f, 16.89f), new PointF(4.9f, 16f), new PointF(6f, 16f));
path.AddBezier(new PointF(6f, 16f), new PointF(7.1f, 16f), new PointF(8f, 16.89f), new PointF(8f, 18f));
path.AddBezier(new PointF(8f, 18f), new PointF(8f, 19.11f), new PointF(7.1f, 20f), new PointF(6f, 20f));
path.CloseFigure();
path.AddBezier(new PointF(12f, 12.5f), new PointF(11.72f, 12.5f), new PointF(11.5f, 12.28f), new PointF(11.5f, 12f));
path.AddBezier(new PointF(11.5f, 12f), new PointF(11.5f, 11.72f), new PointF(11.72f, 11.5f), new PointF(12f, 11.5f));
path.AddBezier(new PointF(12f, 11.5f), new PointF(12.28f, 11.5f), new PointF(12.5f, 11.72f), new PointF(12.5f, 12f));
path.AddBezier(new PointF(12.5f, 12f), new PointF(12.5f, 12.28f), new PointF(12.28f, 12.5f), new PointF(12f, 12.5f));
path.CloseFigure();
path.AddLine(19f, 3f, 13f, 9f);
path.AddLine(13f, 9f, 15f, 11f);
path.AddLine(15f, 11f, 22f, 4f);
path.AddLine(22f, 4f, 22f, 3f);
path.CloseFigure();
path.AddBezier(new PointF(9.64f, 7.64f), new PointF(9.87f, 7.14f), new PointF(10f, 6.59f), new PointF(10f, 6f));
path.AddBezier(new PointF(10f, 6f), new PointF(10f, 3.79f), new PointF(8.21f, 2f), new PointF(6f, 2f));
path.AddBezier(new PointF(6f, 2f), new PointF(3.79f, 2f), new PointF(2f, 3.79f), new PointF(2f, 6f));
path.AddBezier(new PointF(2f, 6f), new PointF(2f, 8.21f), new PointF(3.79f, 10f), new PointF(6f, 10f));
path.AddBezier(new PointF(6f, 10f), new PointF(6.59f, 10f), new PointF(7.14f, 9.87f), new PointF(7.64f, 9.64f));
path.AddLine(7.64f, 9.64f, 10f, 12f);
path.AddLine(10f, 12f, 7.64f, 14.36f);
path.AddBezier(new PointF(7.64f, 14.36f), new PointF(7.14f, 14.13f), new PointF(6.59f, 14f), new PointF(6f, 14f));
path.AddBezier(new PointF(6f, 14f), new PointF(3.79f, 14f), new PointF(2f, 15.79f), new PointF(2f, 18f));
path.AddBezier(new PointF(2f, 18f), new PointF(2f, 20.21f), new PointF(3.79f, 22f), new PointF(6f, 22f));
path.AddBezier(new PointF(6f, 22f), new PointF(8.21f, 22f), new PointF(10f, 20.21f), new PointF(10f, 18f));
path.AddBezier(new PointF(10f, 18f), new PointF(10f, 17.41f), new PointF(9.87f, 16.86f), new PointF(9.64f, 16.36f));
path.AddLine(9.64f, 16.36f, 12f, 14f);
path.AddLine(12f, 14f, 19f, 21f);
path.AddLine(19f, 21f, 22f, 21f);
path.AddLine(22f, 21f, 22f, 20f);
path.AddLine(22f, 20f, 9.64f, 7.64f);
path.CloseFigure();
path.AddBezier(new PointF(6f, 8f), new PointF(4.9f, 8f), new PointF(4f, 7.11f), new PointF(4f, 6f));
path.AddBezier(new PointF(4f, 6f), new PointF(4f, 4.89f), new PointF(4.9f, 4f), new PointF(6f, 4f));
path.AddBezier(new PointF(6f, 4f), new PointF(7.1f, 4f), new PointF(8f, 4.89f), new PointF(8f, 6f));
path.AddBezier(new PointF(8f, 6f), new PointF(8f, 7.11f), new PointF(7.1f, 8f), new PointF(6f, 8f));
path.CloseFigure();
path.AddBezier(new PointF(6f, 20f), new PointF(4.9f, 20f), new PointF(4f, 19.11f), new PointF(4f, 18f));
path.AddBezier(new PointF(4f, 18f), new PointF(4f, 16.89f), new PointF(4.9f, 16f), new PointF(6f, 16f));
path.AddBezier(new PointF(6f, 16f), new PointF(7.1f, 16f), new PointF(8f, 16.89f), new PointF(8f, 18f));
path.AddBezier(new PointF(8f, 18f), new PointF(8f, 19.11f), new PointF(7.1f, 20f), new PointF(6f, 20f));
path.CloseFigure();
path.AddBezier(new PointF(12f, 12.5f), new PointF(11.72f, 12.5f), new PointF(11.5f, 12.28f), new PointF(11.5f, 12f));
path.AddBezier(new PointF(11.5f, 12f), new PointF(11.5f, 11.72f), new PointF(11.72f, 11.5f), new PointF(12f, 11.5f));
path.AddBezier(new PointF(12f, 11.5f), new PointF(12.28f, 11.5f), new PointF(12.5f, 11.72f), new PointF(12.5f, 12f));
path.AddBezier(new PointF(12.5f, 12f), new PointF(12.5f, 12.28f), new PointF(12.28f, 12.5f), new PointF(12f, 12.5f));
path.CloseFigure();
path.AddLine(19f, 3f, 13f, 9f);
path.AddLine(13f, 9f, 15f, 11f);
path.AddLine(15f, 11f, 22f, 4f);
path.AddLine(22f, 4f, 22f, 3f);
path.CloseFigure();
var m = Matrix.Create();
var c = new PointF((float)t.CenterX, (float)t.CenterY);
// translate
m.Translate((float)t.OffsetX, (float)t.OffsetY);
// rotate
m.RotateAt((float)t.RotateAngle, c);
// skew
m.Translate(-c.X, -c.Y);
m.Prepend(Matrix.Create(1, (float)Math.Tan(Math.PI * t.SkewAngleY / 180.0), (float)Math.Tan(Math.PI * t.SkewAngleX / 180.0), 1, 0, 0));
m.Translate(c.X, c.Y);
// scale
m.ScaleAt((float)t.ScaleX, (float)t.ScaleY, (float)t.CenterX, (float)t.CenterY);
graphics.SaveTransform();
graphics.MultiplyTransform(m);
var brush = new SolidBrush(Colors.Black);
var pen = new Pen(Colors.Red, 0.5f);
graphics.FillPath(brush, path);
graphics.DrawPath(pen, path);
brush.Dispose();
pen.Dispose();
graphics.RestoreTransform();
}