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Added create thumbnail method

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This commit is contained in:
Jaex 2017-07-10 10:03:05 +03:00
parent 113df131a4
commit 04985a6147
2 changed files with 50 additions and 1 deletions
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49
ShareX.HelpersLib/Helpers/ImageHelpers.cs
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@ -138,6 +138,55 @@ public static Image ResizeImage(Image img, int width, int height, bool allowEnla
return bmp;
}
public static Image CreateThumbnail(Image img, int width, int height)
{
double srcRatio = (double)img.Width / img.Height;
double dstRatio = (double)width / height;
int w, h;
if (srcRatio >= dstRatio)
{
if (srcRatio >= 1)
{
w = (int)(img.Height * dstRatio);
}
else
{
w = (int)(img.Width / srcRatio * dstRatio);
}
h = img.Height;
}
else
{
w = img.Width;
if (srcRatio >= 1)
{
h = (int)(img.Height / dstRatio * srcRatio);
}
else
{
h = (int)(img.Height * srcRatio / dstRatio);
}
}
int x = (img.Width - w) / 2;
int y = (img.Height - h) / 2;
Bitmap bmp = new Bitmap(width, height, PixelFormat.Format32bppArgb);
bmp.SetResolution(img.HorizontalResolution, img.VerticalResolution);
using (Graphics g = Graphics.FromImage(bmp))
using (img)
{
g.SetHighQuality();
g.DrawImage(img, new Rectangle(0, 0, width, height), new Rectangle(x, y, w, h), GraphicsUnit.Pixel);
}
return bmp;
}
public static Image ResizeImageLimit(Image img, Size size)
{
return ResizeImageLimit(img, size.Width, size.Height);

2
ShareX.MediaLib/Forms/ImageThumbnailerForm.cs
View file

@ -118,7 +118,7 @@ private void btnGenerate_Click(object sender, EventArgs e)
if (img != null)
{
using (img = ImageHelpers.ResizeImage(img, width, height, allowEnlarge, centerImage, Color.White))
using (img = ImageHelpers.CreateThumbnail(img, width, height))
{
string folder = Path.GetDirectoryName(filePath);
string filename = Path.GetFileNameWithoutExtension(filePath);