Csharp/C Sharp by API/System.Drawing/Image
Содержание
Image.FromFile(String path)
<source lang="csharp"> /* Professional Windows GUI Programming Using C# by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury,
Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information ISBN: 1861007663
- /
// Change the path(s) if needed. If you have VS.NET write: // "..\\..\\Altamira5.bmp" or @"..\..\Altamira5.bmp" // otherwise // "Altamira5.bmp" // and compile with: // csc Altamira.cs using System; using System.Drawing; using System.Windows.Forms; namespace Altamira { public class Altamira1 : Form {
Pen p;
SolidBrush b, bT = new SolidBrush(Color.Black);
string path = "Altamira5.bmp"; // change the path if needed
Image im;
Font f;
public Altamira1()
{
InitializeComponent();
MyIni();
}
private void InitializeComponent()
{
this.SuspendLayout();
this.ClientSize = new System.Drawing.Size(290, 260);
this.Text = "Altamira";
this.ResumeLayout(false);
}
private void MyIni()
{
Color cP = Color.Gray;
Color cB = Color.LightGray;
p = new Pen(cP, 6);
b = new SolidBrush(cB);
im = Image.FromFile(path);
f = new Font(new FontFamily("Times New Roman"), 10);
}
static void Main()
{
Application.Run(new Altamira1());
}
protected override void OnPaint(PaintEventArgs pea)
{
Sketch();
//SketchDBuf();
}
private void Sketch()
{
Graphics g = Graphics.FromHwnd(this.Handle); // <=> g = CreateGraphics();
g.FillRectangle(b, 4, 4, 260, 220); // passe-partout
g.DrawRectangle(p, 4, 4, 260, 220); // frame
g.DrawImage(im, 33, 35, 200, 145 ); // image
g.DrawString("ALTAMIRA", f, bT, 180, 190); // text
g.Dispose();
}
private void SketchDBuf()
{
int hh = 3, w = 260, h = 220;
Graphics g;
Bitmap bm = new Bitmap(w + 2*hh, h + 2*hh);
g = Graphics.FromImage(bm); // buffer graphics
g.FillRectangle(b, hh , hh, w, h); // passe-partout
g.DrawRectangle(new Pen(Color.Gray, 2*hh), hh, hh, w, h); // frame
g.DrawImage(im, hh + 30, hh + 32, 200, 145); // image
g.DrawString("ALTAMIRA", f, bT, 180, 190); // text
g = Graphics.FromHwnd(this.Handle); // real graphics
g.DrawImage(bm, 1, 1);
g.Dispose();
}
} }
</source>
Image.FromStream
<source lang="csharp"> using System; using System.Net; using System.IO; using System.Drawing; using System.Windows.Forms; public class MainClass {
public static void Main() {
WebRequest requestPic = WebRequest.Create("http://www.your.ru/1.jpg");
WebRequest requestHtml = WebRequest.Create("http://www.your.ru");
WebResponse responsePic = requestPic.GetResponse();
WebResponse responseHtml = requestHtml.GetResponse();
Image img = Image.FromStream(responsePic.GetResponseStream());
using (StreamReader r = new StreamReader(responseHtml.GetResponseStream())) {
Console.WriteLine(r.ReadToEnd());
}
}
}
</source>
Image.GetThumbnailImage
<source lang="csharp"> using System; using System.Drawing; using System.Windows.Forms;
class Thumbnail: Form {
const int iSquare = 64;
Image imageThumbnail;
public static void Main()
{
Application.Run(new Thumbnail());
}
public Thumbnail()
{
Text = "Thumbnail";
ResizeRedraw = true;
Image image = Image.FromFile("Color.jpg");
int cxThumbnail, cyThumbnail;
if (image.Width > image.Height)
{
cxThumbnail = iSquare;
cyThumbnail = iSquare * image.Height / image.Width;
}
else
{
cyThumbnail = iSquare;
cxThumbnail = iSquare * image.Width / image.Height;
}
imageThumbnail = image.GetThumbnailImage(cxThumbnail, cyThumbnail,
null, (IntPtr) 0);
}
protected override void OnPaint(PaintEventArgs pea)
{
DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
}
protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
{
for (int y = 0; y < cy; y += iSquare){
for (int x = 0; x < cx; x += iSquare)
grfx.DrawImage(imageThumbnail,
x + (iSquare - imageThumbnail.Width) / 2,
y + (iSquare - imageThumbnail.Height) / 2,
imageThumbnail.Width, imageThumbnail.Height);
}
}
}
</source>
Image.Height
<source lang="csharp"> using System; using System.Drawing; using System.Windows.Forms;
class CenterPixelSizeImage: Form {
Image image = Image.FromFile("Color.jpg");
public static void Main()
{
Application.Run(new CenterPixelSizeImage());
}
public CenterPixelSizeImage()
{
ResizeRedraw = true;
}
protected override void OnPaint(PaintEventArgs pea)
{
DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
}
protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
{
grfx.DrawImage(image, (cx - image.Width) / 2,
(cy - image.Height) / 2,
image.Width, image.Height);
}
}
</source>
Image.RotateFlip(RotateFlipType.Rotate180FlipY)
<source lang="csharp"> /* Professional Windows GUI Programming Using C# by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury,
Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information ISBN: 1861007663
- /
using System; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; using System.Data; namespace ImageFlip {
/// <summary>
/// Summary description for ImageFlip.
/// </summary>
public class ImageFlip : System.Windows.Forms.Form
{
private System.Windows.Forms.GroupBox groupBox1;
private System.Windows.Forms.CheckBox checkBox1;
private System.Windows.Forms.RadioButton radioButton1;
Image im = null;
Image im2 = null;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.RadioButton radioButton2;
private System.Windows.Forms.RadioButton radioButton3;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ruponentModel.Container components = null;
public ImageFlip()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
this.Text = "Flipping and Rotating";
this.radioButton1.Checked = false;
this.label1.Text = "";
this.groupBox1.Text = "RotateFlipType";
this.checkBox1.Text = "Paint";
this.radioButton1.Text = "Rotate180FlipY";
this.radioButton2.Text = "Rotate180FlipX";
this.radioButton3.Text = "Rotate180FlipNone";
this.radioButton1.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
this.radioButton2.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
this.radioButton3.CheckedChanged += new System.EventHandler(this.radioButtons_CheckedChanged);
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.groupBox1 = new System.Windows.Forms.GroupBox();
this.radioButton1 = new System.Windows.Forms.RadioButton();
this.checkBox1 = new System.Windows.Forms.CheckBox();
this.label1 = new System.Windows.Forms.Label();
this.radioButton2 = new System.Windows.Forms.RadioButton();
this.radioButton3 = new System.Windows.Forms.RadioButton();
this.groupBox1.SuspendLayout();
this.SuspendLayout();
//
// groupBox1
//
this.groupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
this.radioButton3,
this.radioButton2,
this.radioButton1,
this.checkBox1});
this.groupBox1.Location = new System.Drawing.Point(312, 64);
this.groupBox1.Name = "groupBox1";
this.groupBox1.Size = new System.Drawing.Size(248, 80);
this.groupBox1.TabIndex = 1;
this.groupBox1.TabStop = false;
this.groupBox1.Text = "groupBox1";
//
// radioButton1
//
this.radioButton1.Location = new System.Drawing.Point(120, 16);
this.radioButton1.Name = "radioButton1";
this.radioButton1.Size = new System.Drawing.Size(112, 24);
this.radioButton1.TabIndex = 1;
this.radioButton1.Text = "radioButton1";
//
// checkBox1
//
this.checkBox1.Location = new System.Drawing.Point(16, 16);
this.checkBox1.Name = "checkBox1";
this.checkBox1.TabIndex = 0;
this.checkBox1.Text = "checkBox1";
this.checkBox1.CheckedChanged += new System.EventHandler(this.checkBox1_CheckedChanged);
//
// label1
//
this.label1.Location = new System.Drawing.Point(8, 8);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(304, 200);
this.label1.TabIndex = 2;
this.label1.Text = "label1";
//
// radioButton2
//
this.radioButton2.Location = new System.Drawing.Point(16, 48);
this.radioButton2.Name = "radioButton2";
this.radioButton2.TabIndex = 2;
this.radioButton2.Text = "radioButton2";
//
// radioButton3
//
this.radioButton3.Location = new System.Drawing.Point(120, 48);
this.radioButton3.Name = "radioButton3";
this.radioButton3.Size = new System.Drawing.Size(120, 24);
this.radioButton3.TabIndex = 3;
this.radioButton3.Text = "radioButton3";
//
// ImageFlip
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(560, 214);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.label1,
this.groupBox1});
this.Name = "ImageFlip";
this.Text = "ImageFlip";
this.groupBox1.ResumeLayout(false);
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new ImageFlip());
}
protected override void OnPaint(PaintEventArgs e)
{ RotateFlip(); }
private void label1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{ RotateFlip(); }
private void checkBox1_CheckedChanged(object sender, System.EventArgs e)
{ RotateFlip(); }
private void radioButtons_CheckedChanged(object sender, System.EventArgs e)
{ RotateFlip(); }
protected void RotateFlip()
{
Graphics g = Graphics.FromHwnd(this.label1.Handle);
Brush b = new SolidBrush(this.label1.BackColor);
if (this.checkBox1.Checked)
{
if (im == null) ReadImage();
Graphics g2 = Graphics.FromImage(im); // For text "Himalaya"
FontFamily ff = new FontFamily("Times New Roman");
Font f = new Font(ff, 25, FontStyle.Bold);
g2.DrawString("HIMALAYA", f, new SolidBrush(Color.Yellow), 170, 210);
g2.Dispose();
im2 = (Image)im.Clone();
int w2 = label1.Width/2, h2 = label1.Height/2;
g.DrawImage(im, 0, 0, w2, h2);
if(this.radioButton1.Checked) // Rotate180FlipY
{
im2.RotateFlip(RotateFlipType.Rotate180FlipY);
g.DrawImage(im2, w2, 0, w2, h2);
}
else g.FillRectangle(b, w2, 0, w2, h2); // Clear old
if(this.radioButton2.Checked) // Rotate180FlipX
{
im2.RotateFlip(RotateFlipType.Rotate180FlipX);
g.DrawImage(im2, 0, h2, w2, h2);
}
else g.FillRectangle(b, 0, h2, w2, h2); // Clear old
if(this.radioButton3.Checked) // Rotate180FlipNone
{
im2.RotateFlip(RotateFlipType.Rotate180FlipNone);
g.DrawImage(im2, w2, h2, w2, h2); // Clear old
}
else g.FillRectangle(b, w2, h2, w2, h2);
im2.Dispose();
}
else Clear(g);
b.Dispose(); g.Dispose();
}
protected void ReadImage()
{
string path = @"Himalaya.bmp";
im = Image.FromFile(path);
this.radioButton1.Enabled = true;
this.radioButton2.Enabled = true;
this.radioButton3.Enabled = true;
}
protected void Clear(Graphics g)
{
g.Clear(this.BackColor);
g.Dispose();
im = null;
im2 = null;
this.radioButton1.Checked = false;
this.radioButton2.Checked = false;
this.radioButton3.Checked = false;
this.radioButton1.Enabled = false;
this.radioButton2.Enabled = false;
this.radioButton3.Enabled = false;
}
}
}
</source>
Image.VerticalResolution
<source lang="csharp">
using System; using System.Drawing; using System.Windows.Forms;
class CenterImage: Form {
Image image = Image.FromFile("Color.jpg");
public static void Main()
{
Application.Run(new CenterImage());
}
public CenterImage()
{
ResizeRedraw = true;
}
protected override void OnPaint(PaintEventArgs pea)
{
DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
}
protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
{
grfx.PageUnit = GraphicsUnit.Pixel;
grfx.PageScale = 1;
RectangleF rectf = grfx.VisibleClipBounds;
float cxImage = grfx.DpiX * image.Width /
image.HorizontalResolution;
float cyImage = grfx.DpiY * image.Height /
image.VerticalResolution;
grfx.DrawImage(image, (rectf.Width - cxImage) / 2,
(rectf.Height - cyImage) / 2);
}
}
</source>
