how to alter valid windows icon programmatically?
I need create like 10k different icons for testing, can be in C# or powershell. I have actually 10k identical icons files with different names and I thought I could easily read binary icon in, convert to bytes inject some random number and write back to a file but it doesn't work that way as I see.
$fi = @(Get-ChildItem D:\icons -rec | ForEach-Object -Process {$_.FullName}) # | select -first $amount)
$no = 0
foreach($i in $fi)
{
$array = Read-FileByte $i;
$array = $array + [System.Text.Encoding]::UTF8.GetBytes($no)
[System.IO.File]::WriteAllBytes($i, $array)
$no++
}
After this code run icons开发者_如何学JAVA still are considered by windows identical.
ALternative way would be creating valid 10k icons programmatically, is there a way to do this? thanks
You can use this code to generate as many random icons as you like:
using System;
using System.Linq;
using System.Drawing;
using System.IO;
static class Program
{
[STAThread]
static void Main()
{
var gen = new RandomIconGenerator(32);
var dir = new DirectoryInfo(@"C:\RandIcons\");
if (!dir.Exists) dir.Create();
for (int it = 0; it < 1000; it++)
using (var s = new FileStream(@"C:\RandIcons\" + "icon-" + it + ".ico", FileMode.Create))
gen.MakeRandomIcon().Save(s);
}
}
/// <summary>
/// Generates random icons using various colored shapes and lines, using available brushes and pens.
/// </summary>
public class RandomIconGenerator
{
Random r = new Random();
Pen[] pens = typeof(Pens).GetProperties().Select(p => (Pen)p.GetValue(null, null)).ToArray();
Brush[] brushes = typeof(Brushes).GetProperties().Select(p => (Brush)p.GetValue(null, null)).ToArray();
int size;
public RandomIconGenerator(int size) { this.size = size; }
public Icon MakeRandomIcon()
{
using (Bitmap bmp = new Bitmap(size, size))
using (Graphics g = Graphics.FromImage(bmp))
{
for (int it = 0; it < 20; it++) this.GetRandomPainter()(g);
g.Flush();
return Icon.FromHandle(bmp.GetHicon());
}
}
private Pen GetRandomPen() { return this.pens[this.r.Next(this.pens.Length)]; }
private Brush GetRandomBrush() { return this.brushes[this.r.Next(this.brushes.Length)]; }
private Action<Graphics> GetRandomPainter()
{
switch (r.Next(5))
{
case 0: return g => g.DrawLine(this.GetRandomPen(), this.GetRandomPoint(), this.GetRandomPoint());
case 1: return g => g.DrawRectangle(this.GetRandomPen(), this.GetRandomRect());
case 2: return g => g.DrawEllipse(this.GetRandomPen(), this.GetRandomRect());
case 3: return g => g.FillRectangle(this.GetRandomBrush(), this.GetRandomRect());
case 4: return g => g.FillEllipse(this.GetRandomBrush(), this.GetRandomRect());
default: throw new Exception();
}
}
private Rectangle GetRandomRect()
{
var p0 = this.GetRandomPoint();
return new Rectangle(p0, new Size(this.GetRandomPoint()) - new Size(p0));
}
private int GetRandomPos() { return this.r.Next(this.size); }
private Point GetRandomPoint() { return new Point(this.GetRandomPos(), this.GetRandomPos()); }
}
//fixed
[DllImport("user32.dll", SetLastError = true)] static extern bool DestroyIcon(IntPtr hIcon);
public Icon MakeRandomIcon()
{
using (Bitmap bmp = new Bitmap(size, size))
using (Graphics g = Graphics.FromImage(bmp))
{
for (int it = 0; it < 20; it++) this.GetRandomPainter()(g);
g.Dispose();
IntPtr hIcon = bmp.GetHicon();
Icon temp = Icon.FromHandle(hIcon);
Icon ico = (Icon)temp.Clone();
temp.Dispose();
DestroyIcon(hIcon);
return ico;
}
}
//thanks Miguel again.
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