private void btnBufferInBufferDraw_Click(object sender, EventArgs e)
{
//create & render to main buffer
PixelsBuffer buffer = new PixelsBuffer(width, height);
DrawStar(buffer, Colors.Red, Colors.White);
//create a sub view (50, 50, 100, 100) - inversed
PixelsBuffer view = buffer.CreateView(50, 250, 100, 100, true);
DrawStar(view, Colors.Blue, Colors.YellowGreen);
//create a sub view (50, 50, 100, 100)
view = buffer.CreateView(250, 150, 100, 100);
DrawStar(view, Colors.Goldenrod, Colors.LemonChiffon);
//show to screen
DisplayBuffer(buffer);
#region Description
string msg = "This example demonstrates that logical views with different coordinate systems can be attached to the same pixel buffer";
txtDescription.Text = msg;
#endregion
}
private void Draw(ImageView imageView, int times)
{
var start = DateTime.Now;
PixelsBuffer buffer = new PixelsBuffer(600, 600);
IDrawer drawer = new Drawer(buffer);
drawer.Clear(Colors.Transparent);
//create fill for drawing
Fill fill = new Fill(Colors.Transparent);
//fill.Opacity = 0.3;
//draw content
var coords1 = GetPath(1);
var coords2 = GetPath(0);
var coords3 = GetPath(2);
var path = GetPath();
var startDraw = DateTime.Now;
int step = 5;
for (int i = 0; i < times; i++)
{
//drawer.DrawRectangle(fill, 10, 10, 300, 300);
//drawer.DrawEllipse(fill, 200, 200, 120, 200);
//drawer.DrawPolygon(fill, coords1);
//drawer.DrawPolygon(fill, coords2);
//drawer.DrawPolygon(fill, coords3);
//draw content
//drawer.Rotate(15);
//drawer.Scale(0.3, 0.3);
//drawer.DrawPath(fill, path);
var margin = i / 10 * step;
PixelsBuffer view = buffer.CreateView(margin, margin, buffer.Width - margin * 2, buffer.Height - margin * 2, true);
DrawFrame(view, Colors.OrangeRed);
DrawLine(view, Colors.Olive);
}
DrawLion(buffer, 200, 200);
if (bmp != null)
{
bmp.Dispose();
}
bmp = BufferToBitmap.GetBitmap(buffer);
//show to screen
var icon = BitmapFactory.DecodeResource(this.Resources, Resource.Drawable.Icon);
imageView.SetImageBitmap(BufferToBitmap.Overlay(new Bitmap[] { icon, bmp }));
Android.Util.Log.Debug("Draw " + times, "Draw: " + (DateTime.Now - startDraw).TotalSeconds.ToString() + " Total: " + (DateTime.Now - start).TotalSeconds.ToString());
}
private void btnBufferInBuffer_Click(object sender, EventArgs e)
{
//create main buffer
PixelsBuffer buffer = new PixelsBuffer(width, height);
//create a sub view (100 pixels margin)
int margin = 100;
#region Approach 1
//calculate new view's parameter by hand
//then attach the new view to main buffer
/*
* int viewStride = -buffer.Stride; //inverse coordinate system of view
* int viewOffset = buffer.GetPixelIndex(margin, margin);
* PixelBuffer view = new PixelBuffer();
* view.Attach(buffer, width - margin * 2, height - margin * 2, viewStride, viewOffset);
*/
#endregion
#region Approach 2
//a much easier way to create sub-view
PixelsBuffer view = buffer.CreateView(margin, margin, width - margin * 2, height - margin * 2, true);
#endregion
//render to main buffer
DrawLine(buffer, Colors.Red);
DrawFrame(buffer, Colors.Red);
//render to sub view
DrawLine(view, Colors.Blue);
DrawFrame(view, Colors.Blue);
//show to screen
DisplayBuffer(buffer);
#region Description
string msg = "This example creates a main buffer, render pixels to it. Then, create a sub-view with inversed y-axis, and render to this view.";
txtDescription.Text = msg;
#endregion
}
