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using System;
using System.Diagnostics;
using System.IO;
using Cairo;
public class CairoPng
{
public void CreatePng ()
{
const int Width = 480;
const int Height = 160;
const int CheckSize = 10;
const int Spacing = 2;
// Create an Image-based surface with data stored in ARGB32 format and a context,
// "using" is used here to ensure that they are Disposed once we are done
using (ImageSurface surface = new ImageSurface (Format.ARGB32, Width, Height))
using (Context cr = new Cairo.Context (surface))
{
// Start drawing a checkerboard
int i, j, xcount, ycount;
xcount = 0;
i = Spacing;
while (i < Width) {
j = Spacing;
ycount = xcount % 2; // start with even/odd depending on row
while (j < Height) {
if (ycount % 2 != 0)
cr.SetSourceRGB (1, 0, 0);
else
cr.SetSourceRGB (1, 1, 1);
// If we're outside the clip, this will do nothing.
cr.Rectangle (i, j, CheckSize, CheckSize);
cr.Fill ();
j += CheckSize + Spacing;
++ycount;
}
i += CheckSize + Spacing;
++xcount;
}
// Select a font to draw with
cr.SelectFontFace ("serif", FontSlant.Normal, FontWeight.Bold);
cr.SetFontSize (64.0);
// Select a color (blue)
cr.SetSourceRGB (0, 0, 1);
// Draw
cr.MoveTo (20, 100);
cr.ShowText ("Hello, World");
surface.WriteToPng ("test.png");
}
}
static void Main ()
{
var app = new CairoPng ();
int iterations = 100;
for (int loop = 0; loop < 10; loop++) {
Stopwatch stop_watch = new Stopwatch ();
stop_watch.Start ();
Console.Write ("Starting iterations, {0} bytes used...\t", Process.GetCurrentProcess().PrivateMemorySize64);
for (int i = 0; i < iterations; i++) {
app.CreatePng ();
}
stop_watch.Stop ();
Console.WriteLine ("Created {0} PNG files in {1}ms", iterations, stop_watch.ElapsedMilliseconds);
System.Threading.Thread.Sleep (1000);
}
}
}
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