I have an image .I want to crop 10 px from left and 10px from right of the image.I used the below code to do so
string oldImagePath="D:\\RD\\dotnet\\Images\\photo1.jpg";
Bitmap myOriginalImage = (Bitmap)Bitmap.FromFile(oldImagePath);
int newWidth = myOriginalImage.Width;
int newHeight = myOriginalImage.Height;
Rectangle cropArea = new Rectangle(10,0, newWidth-10, newHeight);
Bitmap target = new Bitmap(cropArea.Width, cropArea.Height);
using (Graphics g = Graphics.FromImage(target))
{
g.DrawImage(myOriginalImage,cropArea);
}
target.Save("D:\\RD\\dotnet\\Images\\test.jpg");
But this is not giving me the results which i expect. This outputs an image which has 10 px cropped from the right and a resized image.Instead of cropiing it is resizing the width i think.So the image is shrinked(by width). Can any one correct me ? Thanks in advance
Your new width should be reduced by twice the crop margin, since you'll be chopping off that amount from both sides.
Next, when drawing the image into the new one, draw it at a negative offset. This causes the area that you aren't interested in to be clipped off.
int cropX = 10;
Bitmap target = new Bitmap(myOriginalImage.Width - 2*cropX, myOriginalImage.Height);
using (Graphics g = Graphics.FromImage(target))
{
g.DrawImage(myOriginalImage, -cropX, 0);
}
My guess is this line
Rectangle cropArea = new Rectangle(10,0, newWidth-10, newHeight);
should be
Rectangle cropArea = new Rectangle(10,0, newWidth-20, newHeight);
Set the width of the new rectangle to be 20 less than the original - 10 for each side.
Some indication what result it is giving you would be helpful in confirming this.
Corey Ross is correct. Alternately, you can translate along the negative x axis and render at 0.0, 0.0. Should produce identical results.
using (Graphics g = Graphics.FromImage(target))
{
g.TranslateTransform(-cropX, 0.0f);
g.DrawImage(myOriginalImage, 0.0f, 0.0f);
}
You need to use the overload that has you specify both Destination Rectangle, and Source Rectangle.
Below is an interactive form of this using a picture box on a form. It allows you to drag the image around. I suggest making the picture box 100 x 100 and have a much larger image such as a full screen window you've captured with alt-prtscr.
class Form1 : Form
{
// ...
Image i = new Bitmap(#"C:\Users\jasond\Pictures\foo.bmp");
Point lastLocation = Point.Empty;
Size delta = Size.Empty;
Point drawLocation = Point.Empty;
bool dragging = false;
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
if (!dragging)
{
lastLocation = e.Location;
dragging = true;
}
delta = new Size(lastLocation.X - e.Location.X, lastLocation.Y - e.Location.Y);
lastLocation = e.Location;
if (!delta.IsEmpty)
{
drawLocation.X += delta.Width;
drawLocation.Y += delta.Height;
pictureBox1.Invalidate();
}
}
else
{
dragging = false;
}
}
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
Rectangle source = new Rectangle(drawLocation,pictureBox1.ClientRectangle.Size);
e.Graphics.DrawImage(i,pictureBox1.ClientRectangle,source, GraphicsUnit.Pixel);
}
//...
Okay, I totally fail at explaining this, but hang on:
The DrawImage function requires the location of the image, as well as it's position. You need a second position for cropping as how the old relates to the new, not vice versa.
That was entirely incomprehensible, but here is the code.
g.DrawImage(myOriginalImage, -cropArea.X, -cropArea.Y);
I hope that explains it more then I did.
Related
I'm creating an image viewer using C# and having a small issue with scaling (zooming) PictureBox.
I have a PictureBox inside a Panel, and I can zoom (scale) an image using the controls at the top left and using mouse wheel just fine. However, at some specific zoom scales, the image doesn't cover the whole PictureBox.
For example, SO logo (100x116 pixels) at 100% and at 200%:
Image at the right is 199x131 pixels, while the PictureBox is 200x132.
I've set the BackColor of the PictureBox to Red to make the issue noticeable.
This doesn't always happen, just at specific zoom levels. Why is that? Am I doing something wrong?
I can set the BackColor of PictureBox to the BackColor of the Panel to give the illusion that the image covers the whole PictureBox, but I rather fix the problem. If I can't, I'll apply the tricky solution.
Relevant code:
float zoom = 1;
Image image = null;
public MainForm(string[] args)
{
InitializeComponent();
image = ImageBox.Image;
this.ImageBox.MouseWheel += ImageBox_MouseWheel;
if (args.Length > 0)
{
LoadImage(args[0]);
}
}
private void ImageBox_Paint(object sender, PaintEventArgs e)
{
// disable interpolation (sharper pixels)
e.Graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
// https://msdn.microsoft.com/en-us/library/ms142046(v=vs.110).aspx
e.Graphics.DrawImage(image,
new Rectangle(0, 0, ImageBox.Width, ImageBox.Height),
0, 0, image.Width, image.Height, GraphicsUnit.Pixel);
}
private void LoadImage(string path)
{
image = Image.FromFile(path);
ImageBox.Width = (int)(image.Width * zoom);
ImageBox.Height = (int)(image.Height * zoom);
ImageBox.Image = image;
CenterImage();
}
private void ScaleImage()
{
ImageBox.Image = null;
ImageBox.Width = (int)(image.Width * zoom);
ImageBox.Height = (int)(image.Height * zoom);
ImageBox.Image = image;
CenterImage();
}
I've also created a repository, in case anyone wants to examine the app live.
You need to adjust the rectangle in ImageBox_Paint. Try this:
private void ImageBox_Paint(object sender, PaintEventArgs e)
{
int add = ImageBox.Width / 200;
// disable interpolation (sharper pixels)
e.Graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
// https://msdn.microsoft.com/en-us/library/ms142046(v=vs.110).aspx
e.Graphics.DrawImage(image,
new Rectangle(0, 0, ImageBox.Width + add, ImageBox.Height + add),
0, 0, image.Width, image.Height, GraphicsUnit.Pixel);
}
Simply set the SizeMode property of the PictureBox to Zoom. Then adapting the size of the picturebox will automatically make the image stretch to its full size.
You don't even need that Paint event listener; it's inbuilt functionality. Just change the dimensions of the PictureBox to the calculated zoomed dimensions of the image and you're done.
Let me preface this with a real life product; You may remember in Elementary school, they had scratch paper which basically consisted of a rainbow-colored sheet of paper with a black film on top. You would take a sharp object and peel away the black film to expose the colored paper.
I am attempting to do the same thing using images in a picture box.
My idea consists of these things:
A textured image.
A black rectangle the size of the picture box.
A circle image.
What I am trying to achieve is to open a program, have an image drawn to a picture box with the black rectangle on top of it. Upon clicking the picture box it uses the circle to invert the alpha of the rectangle where I click using the circle as a reference.
My Problem-
I cannot figure out any way to erase (set the transparency of) a part of the black rectangle where I click.
For the life of me, I do not know of any method to cut a window in an image. It is almost like a reverse crop, where I keep the exterior elements rather than the interior, exposing the textured image below.
Can WinForms not do this? Am I crazy? Should I just give up?
I should mention that I prefer not to have to change alpha on a pixel per pixel basis. It would slow the program down far too much to be used as a pseudo-painter. If that is the only way, however, feel free to show.
Here is an image of what I'm trying to achieve:
This is not really hard:
Set the colored image as a PictureBox's BackgroundImage.
Set a black image as its Image.
And draw into the image using the normal mouse events and a transparent Pen..
We need a point list to use DrawCurve:
List<Point> currentLine = new List<Point>();
We need to prepare and clear the the black layer:
private void ClearSheet()
{
if (pictureBox1.Image != null) pictureBox1.Image.Dispose();
Bitmap bmp = new Bitmap(pictureBox1.ClientSize.Width, pictureBox1.ClientSize.Height);
using (Graphics G = Graphics.FromImage(bmp)) G.Clear(Color.Black);
pictureBox1.Image = bmp;
currentLine.Clear();
}
private void cb_clear_Click(object sender, EventArgs e)
{
ClearSheet();
}
To draw into the Image we need to use an associated Graphics object..:
void drawIntoImage()
{
using (Graphics G = Graphics.FromImage(pictureBox1.Image))
{
// we want the tranparency to copy over the black pixels
G.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceCopy;
G.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
G.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
using (Pen somePen = new Pen(Color.Transparent, penWidth))
{
somePen.MiterLimit = penWidth / 2;
somePen.EndCap = System.Drawing.Drawing2D.LineCap.Round;
somePen.LineJoin = System.Drawing.Drawing2D.LineJoin.Round;
somePen.StartCap = System.Drawing.Drawing2D.LineCap.Round;
if (currentLine.Count > 1)
G.DrawCurve(somePen, currentLine.ToArray());
}
}
// enforce the display:
pictureBox1.Image = pictureBox1.Image;
}
The usual mouse events:
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
currentLine.Add(e.Location);
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
currentLine.Add(e.Location);
drawIntoImage();
}
}
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
currentLine.Clear();
}
That's all that's needed. Make sure to keep the PB's SizeMode = Normal or else the pixels won't match..!
Note that there are a few challenges when you want to get soft edges, more painting tools, letting a simple click paint a dot or an undo or other finer details to work. But the basics are not hard at all..
Btw, changing Alpha is not any different from changing the color channels.
As an alternative you may want to play with a TextureBrush:
TextureBrush brush = new TextureBrush(pictureBox1.BackgroundImage);
using (Pen somePen = new Pen(brush) )
{
// basically
// the same drawing code..
}
But I found this to be rather slow.
Update:
Using a png-file as a custom tip is a little harder; the main reason is that the drawing is reversed: We don't want to draw the pixels, we want to clear them. GDI+ doesn't support any such composition modes, so we need to do it in code.
To be fast we use two tricks: LockBits will be as fast as it gets and restricting the area to our custom brush tip will prevent wasting time.
Let's assume you have a file to use and load it into a bitmap:
string stampFile = #"yourStampFile.png";
Bitmap stamp = null;
private void Form1_Load(object sender, EventArgs e)
{
stamp = (Bitmap) Bitmap.FromFile(stampFile);
}
Now we need a new function to draw it into our Image; instead of DrawCurve we need to use DrawImage:
void stampIntoImage(Point pt)
{
Point point = new Point(pt.X - stamp.Width / 2, pt.Y - stamp.Height / 2);
using (Bitmap stamped = new Bitmap(stamp.Width, stamp.Height) )
{
using (Graphics G = Graphics.FromImage(stamped))
{
stamp.SetResolution(stamped.HorizontalResolution, stamped.VerticalResolution);
G.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceOver;
G.DrawImage(pictureBox1.Image, 0, 0,
new Rectangle(point, stamped.Size), GraphicsUnit.Pixel);
writeAlpha(stamped, stamp);
}
using (Graphics G = Graphics.FromImage(pictureBox1.Image))
{
G.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceCopy;
G.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
G.CompositingQuality =
System.Drawing.Drawing2D.CompositingQuality.HighQuality;
G.DrawImage(stamped, point);
}
}
pictureBox1.Image = pictureBox1.Image;
}
A few notes: I found that I hat to do an explicit SetResolution since the stamp file I photoshopped was 72dpi and the default Bitmaps in my program were 120dpi. Watch out for these differences!
I start the Bitmap to be drawn by copying the right part of the current Image.
Then I call a fast routine that applies the alpha of the stamp to it:
void writeAlpha(Bitmap target, Bitmap source)
{
// this method assumes the bitmaps both are 32bpp and have the same size
int Bpp = 4;
var bmpData0 = target.LockBits(
new Rectangle(0, 0, target.Width, target.Height),
ImageLockMode.ReadWrite, target.PixelFormat);
var bmpData1 = source.LockBits(
new Rectangle(0, 0, source.Width, source.Height),
ImageLockMode.ReadOnly, source.PixelFormat);
int len = bmpData0.Height * bmpData0.Stride;
byte[] data0 = new byte[len];
byte[] data1 = new byte[len];
Marshal.Copy(bmpData0.Scan0, data0, 0, len);
Marshal.Copy(bmpData1.Scan0, data1, 0, len);
for (int i = 0; i < len; i += Bpp)
{
int tgtA = data0[i+3]; // opacity
int srcA = 255 - data1[i+3]; // transparency
if (srcA > 0) data0[i + 3] = (byte)(tgtA < srcA ? 0 : tgtA - srcA);
}
Marshal.Copy(data0, 0, bmpData0.Scan0, len);
target.UnlockBits(bmpData0);
source.UnlockBits(bmpData1);
}
I use a simple rule: Reduce target opacity by the source transparency and make sure we don't get negative.. You may want to play around with it.
Now all we need is to adapt the MouseMove; for my tests I have added two RadioButtons to switch between the original round pen and the custom stamp tip:
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
if (rb_pen.Checked)
{
currentLine.Add(e.Location);
drawIntoImage();
}
else if (rb_stamp.Checked) { stampIntoImage(e.Location); };
}
}
I didn't use a fish but you can see the soft edges:
Update 2: Here is a MouseDown that allows for simple clicks:
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
if (rb_pen.Checked) currentLine.Add(e.Location);
else if (rb_stamp.Checked)
{
{ stampIntoImage(e.Location); };
}
}
I'm doing some draws that are repetitive, and each of them gives lot of work.
What i need to do is rotate the drawing half-way its definition, something like this:
using (Graphics g = Graphics.FromImage(bmp))
{
//define area do pictureBox e preenche a branco
Brush brush = new SolidBrush(Color.White);
Rectangle area = new Rectangle(0, 0, 520, 520);
g.FillRectangle(brush, area);
//rotate
g.RotateTransform(some angle, some reference point)
//draw some more lines on the top of the rotated previous ones.
}
I tried using g.RotateTransform(90) as there is that function in Winforms, but it didn't change anything. Why??
Any tip?
Edit: if it helps, i only need to rotate fixed angles, 180º
RotateTransform certainly does change the subsequent drawing.
Note that you usually need a TranslateTransform before to set the rotation point. But it 'it didn't change anything' is certainly wrong. Try again! And yes you can rotate (or scale or move) at any point and move/turn it back or completely reset the Graphics object.
And yes, learning about Matrix and MultiplyTransform is also very helpful..
But: You need to understand the Graphics object does not contain any graphic, a common misconception! It is the tool which does the drawing on a Bitmap, most often the surface of a Control. So the rotation will happen but only for the things you draw after:
private void panel1_Paint(object sender, PaintEventArgs e)
{
Rectangle rect = new Rectangle(25, 25, 25, 25);
e.Graphics.TranslateTransform(25, 25);
e.Graphics.FillRectangle(Brushes.Red, rect);
for (int i = 0; i < 15; i++)
{
rect.Inflate(2, 2);
e.Graphics.TranslateTransform(5, 2);
e.Graphics.RotateTransform(2.5f);
e.Graphics.DrawRectangle(Pens.Blue, rect);
}
}
Try this:
use these references:
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
I made windows application and put on form1 picturebox then this is the code in form_load:
//Load an image in from a file
Bitmap pImage = new Bitmap(Environment.CurrentDirectory + #"\Image.bmp", true);
//Set our picture box to that image
pictureBox1.Image = (Bitmap)pImage.Clone();
//Store our old image so we can delete it
Image oldImage = pictureBox1.Image;
//Pass in our original image and return a new image rotated 35 degrees right
pictureBox1.Image = RotateImage(pImage, 270);
if (oldImage != null)
{
oldImage.Dispose();
}
Then make static function with parameters of image and rotation angle return the rotated image and call it from form_load as mentioned before :
if (image == null)
{
throw new ArgumentNullException("image");
}
else
{
//create a new empty bitmap to hold rotated image
Bitmap rotatedBmp = new Bitmap(image.Width, image.Height);
rotatedBmp.SetResolution(image.HorizontalResolution, image.VerticalResolution);
//make a graphics object from the empty bitmap
Graphics g = Graphics.FromImage(rotatedBmp);
//move rotation point to center of image
g.TranslateTransform((float)image.Width / 2, (float)image.Height / 2);
//rotate
g.RotateTransform(angle);
//move image back
g.TranslateTransform(-(float)image.Width / 2, -(float)image.Height / 2);
//draw passed in image onto graphics object
g.DrawImage(image, new PointF(0, 0));
return rotatedBmp;
}
You can also use directly the code in form_load by using ready RotateFlipType (Enumeration type) but this with fixed angles like 90,270,.... but the previous method you can use any integer values to rotate the image :
private void Form1_Load(object sender, EventArgs e)
{
//Load an image in from a file
Bitmap pImage = new Bitmap(Environment.CurrentDirectory + #"\Image.bmp", true);
pImage.RotateFlip(RotateFlipType.Rotate90FlipXY);
pictureBox1.Image = pImage;
}
I'm working on a winforms project that involves cropping an image. My goal is to do this by using a fixed-size draggable picturebox control, allowing the user to select the area they want to preserve.
My problem is when I crop the image; it "works", but the crop area offsets a little. Here's the result I get:
To clarify, I'm not talking about the zooming, that's per design. Notice the orange box is mostly focusing on the eye of the storm, but the cropped image is not.
This is my code for the crop operation:
private void tsbRecortar_Click(object sender, EventArgs e)
{
Rectangle recorte = new Rectangle(pbxSeleccion.Location.X, pbxSeleccion.Location.Y, pbxSeleccion.Width, pbxSeleccion.Height);
foto = recortarImagen(foto, recorte);
pbxImagen.Image = foto;
}
private Image recortarImagen(Image imagen, Rectangle recuadro)
{
try
{
Bitmap bitmap = new Bitmap(imagen);
Bitmap cropedBitmap = bitmap.Clone(recuadro, bitmap.PixelFormat);
return (Image)(cropedBitmap);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error");
return null;
}
}
pbxSeleccion is the draggable orange rectangle; its parent is pbxImage (I re-parent it on form's load).
As you can see, I'm using the coordinates of pbxSeleccion to define the starting point of the crop area, but is not working as expected... sometimes, I even get an "Out of Memory" exception.
I think this has to do with how the image loads in the parent picturebox, something about how the margin is handled "under the hood", but nothing I tried fixes it... just changes the magnitude of the offset.
Searching the web and SO has helped me a lot, but for this particular issue, I can't seem to find an answer... please, feel free to point out improvements to my code, I haven't been coding for long and I'm new to C# and .NET
Any help is highly appreciated. Cheers!
Suppose your original image is displayed in a PictureBox. You passed in the wrong location of the orange cropping window. Here is the corrected code for you:
private void tsbRecortar_Click(object sender, EventArgs e){
Point p = yourPictureBox.PointToClient(pbxSelection.PointToScreen(Point.Empty));
Rectangle recorte = new Rectangle(p.X, p.Y, pbxSeleccion.Width, pbxSeleccion.Height);
foto = recortarImagen(foto, recorte);
pbxImagen.Image = foto;
}
I use PointToClient and PointToScreen here because I think it's the best way to do. You can then change the container of your pictureBox safely without having to modify the code. If you use the code like the following, it's not dynamically enough when you want to place your pictureBox in another container:
Rectangle recorte = new Rectangle(pbxSeleccion.X + yourPictureBox.Left,
pbxSeleccion.Y + yourPictureBox.Top,
pbxSeleccion.Width, pbxSeleccion.Height);
NOTE: you can also use RectangleToClient and RectangleToScreen like this:
private void tsbRecortar_Click(object sender, EventArgs e){
Rectangle recorte = yourPictureBox.RectangleToClient(pbxSeleccion.RectangleToScreen(pbxSeleccion.ClientRectangle));
foto = recortarImagen(foto, recorte);
pbxImagen.Image = foto;
}
Try This Code for Cropping the Image in picturebox
public static Image Fit2PictureBox(this Image image, PictureBox picBox)
{
Bitmap bmp = null;
Graphics g;
// Scale:
double scaleY = (double)image.Width / picBox.Width;
double scaleX = (double)image.Height / picBox.Height;
double scale = scaleY < scaleX ? scaleX : scaleY;
// Create new bitmap:
bmp = new Bitmap(
(int)((double)image.Width / scale),
(int)((double)image.Height / scale));
// Set resolution of the new image:
bmp.SetResolution(
image.HorizontalResolution,
image.VerticalResolution);
// Create graphics:
g = Graphics.FromImage(bmp);
// Set interpolation mode:
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
// Draw the new image:
g.DrawImage(
image,
new Rectangle( // Ziel
0, 0,
bmp.Width, bmp.Height),
new Rectangle( // Quelle
0, 0,
image.Width, image.Height),
GraphicsUnit.Pixel);
// Release the resources of the graphics:
g.Dispose();
// Release the resources of the origin image:
image.Dispose();
return bmp;
}
public static Image Crop(this Image image, Rectangle selection)
{
Bitmap bmp = image as Bitmap;
// Check if it is a bitmap:
if (bmp == null)
throw new ArgumentException("Kein gültiges Bild (Bitmap)");
// Crop the image:
Bitmap cropBmp = bmp.Clone(selection, bmp.PixelFormat);
// Release the resources:
image.Dispose();
return cropBmp;
}
Write The Following Code For Mouse Event on PictureBox
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
_selecting = true;
_selection = new Rectangle(new Point(e.X, e.Y), new Size());
}
}
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left && _selecting)
{
// Create cropped image:
try
{
Image img = pictureBox1.Image.Crop(_selection);
// Fit image to the picturebox:
pictureBox1.Image = img.Fit2PictureBox(pictureBox1);
}
catch { }
_selecting = false;
}
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
// Update the actual size of the selection:
if (_selecting)
{
_selection.Width = e.X - _selection.X;
_selection.Height = e.Y - _selection.Y;
// Redraw the picturebox:
pictureBox1.Refresh();
}
}
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
if (_selecting)
{
// Draw a rectangle displaying the current selection
Pen pen = Pens.LightSkyBlue;
e.Graphics.DrawRectangle(pen, _selection);
}
}
Output Screen
Before Cropping
After Cropping
I want to rotate an image in the picture box. Here is my code.
public static Bitmap RotateImage(Image image, PointF offset, float angle)
{
if (image == null)
{
throw new ArgumentNullException("image");
}
var rotatedBmp = new Bitmap(image.Width, image.Height);
rotatedBmp.SetResolution(image.HorizontalResolution, image.VerticalResolution);
var g = Graphics.FromImage(rotatedBmp);
g.TranslateTransform(offset.X, offset.Y);
g.RotateTransform(angle);
g.TranslateTransform(-offset.X, -offset.Y);
g.DrawImage(image, new PointF(0, 0));
return rotatedBmp;
}
private void button1_Click(object sender, EventArgs e)
{
Image image = new Bitmap(pictureBox1.Image);
pictureBox1.Image = (Bitmap)image.Clone();
var oldImage = pictureBox1.Image;
var p = new Point(image.Width / 2, image.Height);
pictureBox1.Image = null;
pictureBox1.Image = RotateImage(image, p, 1);
pictureBox1.SizeMode = PictureBoxSizeMode.CenterImage;
pictureBox1.Refresh();
if (oldImage != null)
{
oldImage.Dispose();
}
}
private void button2_Click(object sender, EventArgs e)
{
Image image = new Bitmap(pictureBox1.Image);
pictureBox1.Image = (Bitmap)image.Clone();
var oldImage = pictureBox1.Image;
var p = new Point(image.Width / 2, image.Height);
pictureBox1.Image = null;
pictureBox1.Image = RotateImage(image, p, -1);
pictureBox1.SizeMode = PictureBoxSizeMode.CenterImage;
pictureBox1.Refresh();
if (oldImage != null)
{
oldImage.Dispose();
}
}
Now the problem is that when I rotate the image it gets cut. Here is the situation.
I have stretched the picture box and changed the colour of form just for clear picture.
My question is when I have used the statement
pictureBox1.Image = RotateImage(image, p, 1);
Then why is the picture not getting right after postion as this is the same statement used for any situation where we have to assign some image to groupbox. Why is not it working here? I have searched it before but the most of the searches seem irrelevant to me because they use filip function which rotate through 90,180,270. But I want to rotate by some degree maximum upto 10 degree.
Rotating Controls is not something supported by default (links talking about this: link1, link2). The reason why the picture gets cut is because, after the rotation, its width is bigger than the pictureBox1 one; thus a quick solution would be updating its size after the rotation:
pictureBox1.SizeMode = PictureBoxSizeMode.AutoSize; //Adapts the size automatically
or
pictureBox1.Width = image.Width;
pictureBox1.Height = image.Height;
This should be an acceptable solution (there has to be enough free space to account for the new dimensions of the image after being rotated anyway). The other option would be affecting the PictureBox control directly (by affecting the rectangle defining its boundaries, for example) what would be much more difficult.
Well i have come to know that win Forms are not meant for any transformations and rotations.Changing the mode to AutoSize does not make a difference. The best thing for rotation and transformation is WPF.
WPF has a good transformation classes which rotate and transform objects without affecting the object. The object does not get blurred.
You can use This for rotations and transformations.