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();
}
}
internal void DrawFrame(Graphics g)
{
float y = 0;
foreach (var info in GetDrawInfo())
{
var size = g.MeasureString(info.Font, info.Text);
g.DrawText(info.Font, Colors.White, 10, y, info.Text);
y += size.Height;
}
}
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 DrawFrame(Graphics graphics, Size canvasSize)
{
if (graphics == null)
return;
lock (Boxes)
{
if (Boxes.Count == 0 && canvasSize.Width > 1 && canvasSize.Height > 1)
InitializeBoxes(canvasSize);
var fps = TotalFrames / Watch.Elapsed.TotalSeconds;
// The frames per second as determined by the last frame. Measuring a single frame
// must include EndDraw, since that is when the pipeline is flushed to the device.
var lastFrameFps = Stopwatch.Frequency / (Watch.ElapsedTicks - PreviousFrameStartTicks);
PreviousFrameStartTicks = Watch.ElapsedTicks;
var fpsText = string.Format("Frames per second since start: {0:0.00}, last: {1:0.00}", fps, lastFrameFps);
var start = Watch.ElapsedTicks;
if (EraseBoxes)
graphics.FillRectangle(Colors.Black, new RectangleF(graphics.MeasureString(font, fpsText)));
graphics.DrawText(font, textBrush, 0, 0, fpsText);
var bounds = canvasSize;
graphics.AntiAlias = false;
foreach (var box in Boxes)
{
if (EraseBoxes)
box.Erase(graphics);
box.Move(bounds);
box.Draw(graphics);
}
TotalFrames++;
}
}
