protected sealed override void OnPaint(PaintEventArgs e)
{
if (EnableDoubleBuffering)
{
var screen = ParentWindow.Screen;
var scale = screen.RealScale / screen.Scale;
renderSize = Size.Round(e.ClipRectangle.Size * scale);
if (bitmap == null ||
bitmap.Size.Width < renderSize.Width ||
bitmap.Size.Height < renderSize.Height)
{
if (bitmap != null)
bitmap.Dispose();
bitmap = new Bitmap(renderSize, PixelFormat.Format32bppRgba);
}
var bitmapGraphics = new Graphics(bitmap);
bitmapGraphics.Clear(Brushes.Cached(BackgroundColor));
bitmapGraphics.ScaleTransform(scale);
bitmapGraphics.TranslateTransform(-e.ClipRectangle.Location);
bitmapGraphics.SetClip(e.ClipRectangle * scale); // should be affected by transform
var childArgs = new PaintEventArgs(bitmapGraphics, e.ClipRectangle);
base.OnPaint(childArgs);
OnBufferedPaint(childArgs);
bitmapGraphics.Dispose();
bitmapGraphics = null;
e.Graphics.DrawImage(bitmap, new RectangleF(renderSize), e.ClipRectangle);
if (Platform.IsWpf)
{
// wpf runs out of resources fast here, so we garbage collect
GC.Collect();
}
}
else
{
base.OnPaint(e);
OnBufferedPaint(e);
}
}
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();
}
/// <summary>
///
/// </summary>
/// <param name="g"></param>
private void Draw(Graphics g)
{
g.AntiAlias = false;
g.PixelOffsetMode = PixelOffsetMode.Half;
g.TranslateTransform(_state.PanX, _state.PanY);
g.ScaleTransform(_state.Zoom);
var brush = new SolidBrush(_background);
g.Clear(brush);
brush.Dispose();
var renderer = _context.Editor.Renderers[0];
if (_context.Editor.Project == null)
return;
var container = _context.Editor.Project.CurrentContainer;
if (container.Template != null)
{
DrawBackground(
g,
container.Template.Background,
container.Width,
container.Height);
renderer.Draw(
g,
container.Template,
container.Properties,
null);
}
DrawBackground(
g,
container.Background,
container.Width,
container.Height);
renderer.Draw(
g,
container,
container.Properties,
null);
if (container.WorkingLayer != null)
{
renderer.Draw(
g,
container.WorkingLayer,
container.Properties,
null);
}
if (container.HelperLayer != null)
{
renderer.Draw(
g,
container.HelperLayer,
container.Properties,
null);
}
}
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) };
}