private void button1_Click(object sender, EventArgs e)
{
using (Bitmap bmp1 = new Bitmap(400, 500))
using (LockBmp bmplock = bmp1.Lock())
{
BitmapBuffer wb = bmplock.CreateNewBitmapBuffer();
//lines
int y = 0;
wb.DrawLine(0, y, 100, y + 100, BitmapBufferEx.ColorInt.FromArgb(255, 255, 0, 0)); //red
wb.DrawLine(0, y + 100, 100, y + 0, BitmapBufferEx.ColorInt.FromArgb(255, 0, 0, 255)); //blue
#if DEBUG
wb.DrawLineAa(100, y, 200, y + 100, BitmapBufferEx.ColorInt.FromArgb(255, 255, 0, 0));
wb.DrawLineAa(100, y + 100, 200, y + 0, BitmapBufferEx.ColorInt.FromArgb(255, 0, 0, 255)); //blue
#endif
//----------
y += 150;
wb.DrawLineDDA(0, y, 100, y + 100, BitmapBufferEx.ColorInt.FromArgb(255, 255, 0, 0)); //red
wb.DrawLineDDA(0, y + 100, 100, y + 0, BitmapBufferEx.ColorInt.FromArgb(255, 0, 0, 255)); //blue
wb.DrawEllipse(200, 0, 300, 100, BitmapBufferEx.ColorInt.FromArgb(255, 255, 0, 0));
//
bmplock.WriteAndUnlock();
bmp1.Save("d:\\WImageTest\\a0002.png");
}
}
private void button1_Click(object sender, EventArgs e)
{
using (Bitmap bmp1 = new Bitmap(400, 500))
using (var bmplock = bmp1.Lock())
{
BitmapBuffer wb = bmplock.GetWritableBitmap();
//lines
int y = 0;
wb.DrawLine(0, y, 100, y + 100, PixelFarm.DrawingBuffer.ColorInt.FromArgb(255, 255, 0, 0)); //red
wb.DrawLine(0, y + 100, 100, y + 0, PixelFarm.DrawingBuffer.ColorInt.FromArgb(255, 0, 0, 255)); //blue
wb.DrawLineAa(100, y, 200, y + 100, PixelFarm.DrawingBuffer.ColorInt.FromArgb(255, 255, 0, 0));
wb.DrawLineAa(100, y + 100, 200, y + 0, PixelFarm.DrawingBuffer.ColorInt.FromArgb(255, 0, 0, 255)); //blue
//----------
y += 150;
wb.DrawLineDDA(0, y, 100, y + 100, PixelFarm.DrawingBuffer.ColorInt.FromArgb(255, 255, 0, 0)); //red
wb.DrawLineDDA(0, y + 100, 100, y + 0, PixelFarm.DrawingBuffer.ColorInt.FromArgb(255, 0, 0, 255)); //blue
wb.DrawEllipse(200, 0, 300, 100, PixelFarm.DrawingBuffer.ColorInt.FromArgb(255, 255, 0, 0));
//
bmplock.WriteAndUnlock();
bmp1.Save("d:\\WImageTest\\a0002.png");
}
}
/// <summary>
/// Draws random ellipses
/// </summary>
private void DrawEllipses(BitmapBuffer writeableBmp)
{
// Init some size vars
int w = writeableBmp.PixelWidth - 2;
int h = writeableBmp.PixelHeight - 2;
int wh = w >> 1;
int hh = h >> 1;
// Wrap updates in a GetContext call, to prevent invalidation and nested locking/unlocking during this block
using (writeableBmp.GetBitmapContext())
{
// Clear
writeableBmp.Clear();
// Draw Ellipses
for (int i = 0; i < shapeCount; i++)
{
writeableBmp.DrawEllipse(rand.Next(wh), rand.Next(hh), rand.Next(wh, w), rand.Next(hh, h),
GetRandomColor());
}
// Invalidates on exit of using block
}
}
/// <summary>
/// Draws the different types of shapes.
/// </summary>
private void DrawStaticShapes(BitmapBuffer writeableBmp)
{
// Wrap updates in a GetContext call, to prevent invalidation and nested locking/unlocking during this block
using (writeableBmp.GetBitmapContext())
{
// Init some size vars
int w = writeableBmp.PixelWidth - 2;
int h = writeableBmp.PixelHeight - 2;
int w3rd = w / 3;
int h3rd = h / 3;
int w6th = w3rd >> 1;
int h6th = h3rd >> 1;
// Clear
writeableBmp.Clear();
// Draw some points
for (int i = 0; i < 200; i++)
{
writeableBmp.SetPixel(rand.Next(w3rd), rand.Next(h3rd), GetRandomColor());
}
// Draw Standard shapes
writeableBmp.DrawLine(rand.Next(w3rd, w3rd * 2), rand.Next(h3rd), rand.Next(w3rd, w3rd * 2), rand.Next(h3rd),
GetRandomColor());
writeableBmp.DrawTriangle(rand.Next(w3rd * 2, w - w6th), rand.Next(h6th), rand.Next(w3rd * 2, w),
rand.Next(h6th, h3rd), rand.Next(w - w6th, w), rand.Next(h3rd),
GetRandomColor());
writeableBmp.DrawQuad(rand.Next(0, w6th), rand.Next(h3rd, h3rd + h6th), rand.Next(w6th, w3rd),
rand.Next(h3rd, h3rd + h6th), rand.Next(w6th, w3rd),
rand.Next(h3rd + h6th, 2 * h3rd), rand.Next(0, w6th), rand.Next(h3rd + h6th, 2 * h3rd),
GetRandomColor());
writeableBmp.DrawRectangle(rand.Next(w3rd, w3rd + w6th), rand.Next(h3rd, h3rd + h6th),
rand.Next(w3rd + w6th, w3rd * 2), rand.Next(h3rd + h6th, 2 * h3rd),
GetRandomColor());
// Random polyline
int[] p = new int[rand.Next(7, 10) * 2];
for (int j = 0; j < p.Length; j += 2)
{
p[j] = rand.Next(w3rd * 2, w);
p[j + 1] = rand.Next(h3rd, 2 * h3rd);
}
writeableBmp.DrawPolyline(p, GetRandomColor());
// Random closed polyline
p = new int[rand.Next(6, 9) * 2];
for (int j = 0; j < p.Length - 2; j += 2)
{
p[j] = rand.Next(w3rd);
p[j + 1] = rand.Next(2 * h3rd, h);
}
p[p.Length - 2] = p[0];
p[p.Length - 1] = p[1];
writeableBmp.DrawPolyline(p, GetRandomColor());
// Ellipses
writeableBmp.DrawEllipse(rand.Next(w3rd, w3rd + w6th), rand.Next(h3rd * 2, h - h6th),
rand.Next(w3rd + w6th, w3rd * 2), rand.Next(h - h6th, h), GetRandomColor());
writeableBmp.DrawEllipseCentered(w - w6th, h - h6th, w6th >> 1, h6th >> 1, GetRandomColor());
// Draw Grid
writeableBmp.DrawLine(0, h3rd, w, h3rd, Colors.Black);
writeableBmp.DrawLine(0, 2 * h3rd, w, 2 * h3rd, Colors.Black);
writeableBmp.DrawLine(w3rd, 0, w3rd, h, Colors.Black);
writeableBmp.DrawLine(2 * w3rd, 0, 2 * w3rd, h, Colors.Black);
// Invalidates on exit of using block
}
}
/// <summary>
/// A Fast Bresenham Type Algorithm For Drawing Ellipses http://homepage.smc.edu/kennedy_john/belipse.pdf
/// x2 has to be greater than x1 and y2 has to be greater than y1.
/// </summary>
/// <param name="bmp">The WriteableBitmap.</param>
/// <param name="x1">The x-coordinate of the bounding rectangle's left side.</param>
/// <param name="y1">The y-coordinate of the bounding rectangle's top side.</param>
/// <param name="x2">The x-coordinate of the bounding rectangle's right side.</param>
/// <param name="y2">The y-coordinate of the bounding rectangle's bottom side.</param>
/// <param name="color">The color for the line.</param>
public static void DrawEllipse(this BitmapBuffer bmp, int x1, int y1, int x2, int y2, ColorInt color)
{
bmp.DrawEllipse(x1, y1, x2, y2, color.ToPreMultAlphaColor());
}