I want to make a programm which merges png images into one png. All the images are 78px height, 120px width, so I created a bitmap 1200x78 (I need to merge 10 images) It merges, but every image in the result png is scaled approximately x2. Why?
Here is my code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Security;
using System.Drawing.Imaging;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
OpenFileDialog openFileDialog1;
Bitmap bitmap;
public Form1()
{
InitializeComponent();
openFileDialog1 = new OpenFileDialog();
openFileDialog1.Multiselect = true;
openFileDialog1.Filter =
"Images (*.PNG;*.JPG;*.GIF)|*.PNG;*.JPG;*.GIF|" +
"All files (*.*)|*.*";
openFileDialog1.Title = "Select images to merge";
bitmap = new Bitmap(1200, 78);
}
private void button1_Click(object sender, EventArgs e)
{
DialogResult dr = this.openFileDialog1.ShowDialog();
if (dr == System.Windows.Forms.DialogResult.OK)
{
// Read the files
int shift = 0;
foreach (String file in openFileDialog1.FileNames)
{
// Create a PictureBox.
try
{
PictureBox pb = new PictureBox();
Image loadedImage = Image.FromFile(file);
pb.Height = loadedImage.Height;
pb.Width = loadedImage.Width;
pb.Image = loadedImage;
flowLayoutPanel2.Controls.Add(pb);
paintToBitmap(loadedImage, shift);
shift += loadedImage.Width;
}
catch (SecurityException ex)
{
// The user lacks appropriate permissions to read files, discover paths, etc.
MessageBox.Show("Security error\n\n" +
"Error message: " + ex.Message + "\n\n" +
"Details (send to Support):\n\n" + ex.StackTrace
);
}
catch (Exception ex)
{
// Could not load the image - probably related to Windows file system permissions.
MessageBox.Show("!!!");
}
}
saveImage();
}
}
private void paintToBitmap(Image image, int shift)
{
Graphics graphics = Graphics.FromImage(bitmap);
graphics.DrawImage(image, new Point(shift, 0));
}
private void saveImage()
{
bitmap.Save("d:\\result.png", System.Drawing.Imaging.ImageFormat.Png);
}
private void flowLayoutPanel2_Paint(object sender, PaintEventArgs e)
{
}
}
}
Try update your code to this
graphics.DrawImage(image, new Rectangle(shift, 0,120,78));
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