#region License Information (GPL v3)
/*
ShareX - A program that allows you to take screenshots and share any file type
Copyright (c) 2007-2024 ShareX Team
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Optionally you can also view the license at .
*/
#endregion License Information (GPL v3)
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;
using System.Windows.Media.Imaging;
namespace ShareX.HelpersLib
{
public static class ImageHelpers
{
private const InterpolationMode DefaultInterpolationMode = InterpolationMode.HighQualityBicubic;
public static Bitmap ResizeImage(Bitmap bmp, int width, int height, InterpolationMode interpolationMode = DefaultInterpolationMode)
{
if (width < 1 || height < 1 || (bmp.Width == width && bmp.Height == height))
{
return bmp;
}
Bitmap bmpResult = new Bitmap(width, height, PixelFormat.Format32bppArgb);
bmpResult.SetResolution(bmp.HorizontalResolution, bmp.VerticalResolution);
using (bmp)
using (Graphics g = Graphics.FromImage(bmpResult))
{
g.InterpolationMode = interpolationMode;
g.SmoothingMode = SmoothingMode.HighQuality;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
g.CompositingQuality = CompositingQuality.HighQuality;
g.CompositingMode = CompositingMode.SourceOver;
using (ImageAttributes ia = new ImageAttributes())
{
ia.SetWrapMode(WrapMode.TileFlipXY);
g.DrawImage(bmp, new Rectangle(0, 0, width, height), 0, 0, bmp.Width, bmp.Height, GraphicsUnit.Pixel, ia);
}
}
return bmpResult;
}
public static Bitmap ResizeImage(Bitmap bmp, Size size, InterpolationMode interpolationMode = DefaultInterpolationMode)
{
return ResizeImage(bmp, size.Width, size.Height, interpolationMode);
}
public static Bitmap ScaleImageFast(Bitmap bmp, double scale)
{
return ScaleImageFast(bmp, scale, scale);
}
public static Bitmap ScaleImageFast(Bitmap bmp, double scaleX, double scaleY)
{
using (MemoryStream memoryStream = new MemoryStream())
{
bmp.Save(memoryStream, ImageFormat.Bmp);
memoryStream.Position = 0;
BitmapImage bitmapImage = new BitmapImage();
bitmapImage.BeginInit();
bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
bitmapImage.StreamSource = memoryStream;
bitmapImage.EndInit();
TransformedBitmap transformedBitmap = new TransformedBitmap();
transformedBitmap.BeginInit();
transformedBitmap.Source = bitmapImage;
transformedBitmap.Transform = new System.Windows.Media.ScaleTransform(scaleX, scaleY);
transformedBitmap.EndInit();
return GetBitmap(transformedBitmap);
}
}
private static Bitmap GetBitmap(BitmapSource bitmapSource, PixelFormat pixelFormat = PixelFormat.Format32bppArgb)
{
Bitmap bmp = new Bitmap(bitmapSource.PixelWidth, bitmapSource.PixelHeight, pixelFormat);
BitmapData data = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.WriteOnly, pixelFormat);
bitmapSource.CopyPixels(System.Windows.Int32Rect.Empty, data.Scan0, data.Height * data.Stride, data.Stride);
bmp.UnlockBits(data);
return bmp;
}
public static Bitmap ResizeImage(Bitmap bmp, Size size, bool allowEnlarge, bool centerImage = true)
{
return ResizeImage(bmp, size.Width, size.Height, allowEnlarge, centerImage);
}
public static Bitmap ResizeImage(Bitmap bmp, int width, int height, bool allowEnlarge, bool centerImage = true)
{
return ResizeImage(bmp, width, height, allowEnlarge, centerImage, Color.Transparent);
}
public static Bitmap ResizeImage(Bitmap bmp, int width, int height, bool allowEnlarge, bool centerImage, Color backColor)
{
double ratio;
int newWidth, newHeight;
if (!allowEnlarge && bmp.Width <= width && bmp.Height <= height)
{
ratio = 1.0;
newWidth = bmp.Width;
newHeight = bmp.Height;
}
else
{
double ratioX = (double)width / bmp.Width;
double ratioY = (double)height / bmp.Height;
ratio = ratioX < ratioY ? ratioX : ratioY;
newWidth = (int)(bmp.Width * ratio);
newHeight = (int)(bmp.Height * ratio);
}
int newX = 0;
int newY = 0;
if (centerImage)
{
newX += (int)((width - (bmp.Width * ratio)) / 2);
newY += (int)((height - (bmp.Height * ratio)) / 2);
}
Bitmap bmpResult = new Bitmap(width, height, PixelFormat.Format32bppArgb);
bmpResult.SetResolution(bmp.HorizontalResolution, bmp.VerticalResolution);
using (Graphics g = Graphics.FromImage(bmpResult))
{
if (backColor.A > 0)
{
g.Clear(backColor);
}
g.SetHighQuality();
g.DrawImage(bmp, newX, newY, newWidth, newHeight);
}
return bmpResult;
}
public static Bitmap CreateThumbnail(Bitmap bmp, int width, int height)
{
double srcRatio = (double)bmp.Width / bmp.Height;
double dstRatio = (double)width / height;
int w, h;
if (srcRatio >= dstRatio)
{
if (srcRatio >= 1)
{
w = (int)(bmp.Height * dstRatio);
}
else
{
w = (int)(bmp.Width / srcRatio * dstRatio);
}
h = bmp.Height;
}
else
{
w = bmp.Width;
if (srcRatio >= 1)
{
h = (int)(bmp.Height / dstRatio * srcRatio);
}
else
{
h = (int)(bmp.Height * srcRatio / dstRatio);
}
}
int x = (bmp.Width - w) / 2;
int y = (bmp.Height - h) / 2;
Bitmap bmpResult = new Bitmap(width, height, PixelFormat.Format32bppArgb);
bmpResult.SetResolution(bmp.HorizontalResolution, bmp.VerticalResolution);
using (Graphics g = Graphics.FromImage(bmpResult))
{
g.SetHighQuality();
g.DrawImage(bmp, new Rectangle(0, 0, width, height), new Rectangle(x, y, w, h), GraphicsUnit.Pixel);
}
return bmpResult;
}
/// If image size is bigger than specified size then resize it and keep aspect ratio else return image.
public static Bitmap ResizeImageLimit(Bitmap bmp, int width, int height)
{
if (bmp.Width <= width && bmp.Height <= height)
{
return bmp;
}
double ratioX = (double)width / bmp.Width;
double ratioY = (double)height / bmp.Height;
if (ratioX < ratioY)
{
height = (int)Math.Round(bmp.Height * ratioX);
}
else if (ratioX > ratioY)
{
width = (int)Math.Round(bmp.Width * ratioY);
}
return ResizeImage(bmp, width, height);
}
public static Bitmap ResizeImageLimit(Bitmap bmp, Size size)
{
return ResizeImageLimit(bmp, size.Width, size.Height);
}
public static Bitmap ResizeImageLimit(Bitmap bmp, int size)
{
return ResizeImageLimit(bmp, size, size);
}
public static Bitmap CropBitmap(Bitmap bmp, Rectangle rect)
{
if (bmp != null && rect.X >= 0 && rect.Y >= 0 && rect.Width > 0 && rect.Height > 0 && new Rectangle(0, 0, bmp.Width, bmp.Height).Contains(rect))
{
return bmp.Clone(rect, bmp.PixelFormat);
}
return null;
}
private static Bitmap ApplyCutOutEffect(Bitmap bmp, AnchorStyles effectEdge, CutOutEffectType effectType, int effectSize, Color cutOutBackgroundColor)
{
switch (effectType)
{
case CutOutEffectType.None:
return bmp;
case CutOutEffectType.ZigZag:
return TornEdges(bmp, effectSize, effectSize, effectEdge, false, false, cutOutBackgroundColor);
case CutOutEffectType.TornEdge:
return TornEdges(bmp, effectSize, effectSize * 2, effectEdge, false, true, cutOutBackgroundColor);
case CutOutEffectType.Wave:
return WavyEdges(bmp, effectSize, effectSize * 5, effectEdge, cutOutBackgroundColor);
}
throw new NotImplementedException();
}
public static Bitmap CutOutBitmapMiddle(Bitmap bmp, Orientation orientation, int start, int size, CutOutEffectType effectType, int effectSize, Color cutOutBackgroundColor)
{
if (bmp != null && size > 0)
{
Bitmap firstPart = null, secondPart = null;
if (start > 0)
{
Rectangle r = orientation == Orientation.Horizontal
? new Rectangle(0, 0, Math.Min(start, bmp.Width), bmp.Height)
: new Rectangle(0, 0, bmp.Width, Math.Min(start, bmp.Height));
firstPart = CropBitmap(bmp, r);
AnchorStyles effectEdge = orientation == Orientation.Horizontal ? AnchorStyles.Right : AnchorStyles.Bottom;
firstPart = ApplyCutOutEffect(firstPart, effectEdge, effectType, effectSize, cutOutBackgroundColor);
}
int cutDimension = orientation == Orientation.Horizontal ? bmp.Width : bmp.Height;
if (start + size < cutDimension)
{
int end = Math.Max(start + size, 0);
Rectangle r = orientation == Orientation.Horizontal
? new Rectangle(end, 0, bmp.Width - end, bmp.Height)
: new Rectangle(0, end, bmp.Width, bmp.Height - end);
secondPart = CropBitmap(bmp, r);
AnchorStyles effectEdge = orientation == Orientation.Horizontal ? AnchorStyles.Left : AnchorStyles.Top;
secondPart = ApplyCutOutEffect(secondPart, effectEdge, effectType, effectSize, cutOutBackgroundColor);
}
if (firstPart != null && secondPart != null)
{
return CombineImages(new List { firstPart, secondPart }, orientation);
}
else if (firstPart != null)
{
return firstPart;
}
else if (secondPart != null)
{
return secondPart;
}
}
return bmp;
}
/// Automatically crop image to remove transparent outside area.
public static Bitmap AutoCropTransparent(Bitmap bmp)
{
Rectangle source = new Rectangle(0, 0, bmp.Width, bmp.Height);
Rectangle rect = source;
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true, ImageLockMode.ReadOnly))
{
bool leave = false;
// Find X
for (int x = rect.X; x < rect.Width && !leave; x++)
{
for (int y = rect.Y; y < rect.Height; y++)
{
if (unsafeBitmap.GetPixel(x, y).Alpha > 0)
{
rect.X = x;
leave = true;
break;
}
}
}
// If all pixels transparent
if (!leave)
{
return bmp;
}
leave = false;
// Find Y
for (int y = rect.Y; y < rect.Height && !leave; y++)
{
for (int x = rect.X; x < rect.Width; x++)
{
if (unsafeBitmap.GetPixel(x, y).Alpha > 0)
{
rect.Y = y;
leave = true;
break;
}
}
}
leave = false;
// Find Width
for (int x = rect.Width - 1; x >= rect.X && !leave; x--)
{
for (int y = rect.Y; y < rect.Height; y++)
{
if (unsafeBitmap.GetPixel(x, y).Alpha > 0)
{
rect.Width = x - rect.X + 1;
leave = true;
break;
}
}
}
leave = false;
// Find Height
for (int y = rect.Height - 1; y >= rect.Y && !leave; y--)
{
for (int x = rect.X; x < rect.Width; x++)
{
if (unsafeBitmap.GetPixel(x, y).Alpha > 0)
{
rect.Height = y - rect.Y + 1;
leave = true;
break;
}
}
}
}
if (source != rect)
{
Bitmap croppedBitmap = CropBitmap(bmp, rect);
if (croppedBitmap != null)
{
bmp.Dispose();
return croppedBitmap;
}
}
return bmp;
}
/// Automatically crop image to remove transparent outside area. Only checks center pixels.
public static Bitmap QuickAutoCropTransparent(Bitmap bmp)
{
Rectangle source = new Rectangle(0, 0, bmp.Width, bmp.Height);
Rectangle rect = source;
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true, ImageLockMode.ReadOnly))
{
int middleX = rect.Width / 2;
int middleY = rect.Height / 2;
// Find X
for (int x = rect.X; x < rect.Width; x++)
{
if (unsafeBitmap.GetPixel(x, middleY).Alpha > 0)
{
rect.X = x;
break;
}
}
// Find Y
for (int y = rect.Y; y < rect.Height; y++)
{
if (unsafeBitmap.GetPixel(middleX, y).Alpha > 0)
{
rect.Y = y;
break;
}
}
// Find Width
for (int x = rect.Width - 1; x >= rect.X; x--)
{
if (unsafeBitmap.GetPixel(x, middleY).Alpha > 0)
{
rect.Width = x - rect.X + 1;
break;
}
}
// Find Height
for (int y = rect.Height - 1; y >= rect.Y; y--)
{
if (unsafeBitmap.GetPixel(middleX, y).Alpha > 0)
{
rect.Height = y - rect.Y + 1;
break;
}
}
}
if (source != rect)
{
Bitmap croppedBitmap = CropBitmap(bmp, rect);
if (croppedBitmap != null)
{
bmp.Dispose();
return croppedBitmap;
}
}
return bmp;
}
public static Bitmap AddCanvas(Image img, int margin)
{
return AddCanvas(img, new Padding(margin));
}
public static Bitmap AddCanvas(Image img, int margin, Color canvasColor)
{
return AddCanvas(img, new Padding(margin), canvasColor);
}
public static Bitmap AddCanvas(Image img, Padding margin)
{
return AddCanvas(img, margin, Color.Transparent);
}
public static Bitmap AddCanvas(Image img, Padding margin, Color canvasColor)
{
if (margin.All == 0 || img.Width + margin.Horizontal < 1 || img.Height + margin.Vertical < 1)
{
return null;
}
Bitmap bmp = img.CreateEmptyBitmap(margin.Horizontal, margin.Vertical);
using (Graphics g = Graphics.FromImage(bmp))
{
g.SetHighQuality();
g.DrawImage(img, margin.Left, margin.Top, img.Width, img.Height);
if (canvasColor.A > 0)
{
g.CompositingMode = CompositingMode.SourceCopy;
g.SmoothingMode = SmoothingMode.None;
using (Brush brush = new SolidBrush(canvasColor))
{
if (margin.Left > 0)
{
g.FillRectangle(brush, 0, 0, margin.Left, bmp.Height);
}
if (margin.Top > 0)
{
g.FillRectangle(brush, 0, 0, bmp.Width, margin.Top);
}
if (margin.Right > 0)
{
g.FillRectangle(brush, bmp.Width - margin.Right, 0, margin.Right, bmp.Height);
}
if (margin.Bottom > 0)
{
g.FillRectangle(brush, 0, bmp.Height - margin.Bottom, bmp.Width, margin.Bottom);
}
}
}
}
return bmp;
}
public static Bitmap DrawBackgroundImage(Bitmap bmp, Bitmap backgroundImage, bool center = true, bool tile = false)
{
if (bmp != null && backgroundImage != null)
{
using (bmp)
using (backgroundImage)
{
Bitmap bmpResult = bmp.CreateEmptyBitmap();
using (Graphics g = Graphics.FromImage(bmpResult))
{
g.SetHighQuality();
g.PixelOffsetMode = PixelOffsetMode.Half;
if (tile)
{
using (TextureBrush brush = new TextureBrush(backgroundImage, WrapMode.Tile))
{
if (center)
{
int tileX = (bmpResult.Width - backgroundImage.Width) / 2 % backgroundImage.Width;
int tileY = (bmpResult.Height - backgroundImage.Height) / 2 % backgroundImage.Height;
brush.TranslateTransform(tileX, tileY);
}
g.FillRectangle(brush, 0, 0, bmpResult.Width, bmpResult.Height);
}
}
else
{
float aspectRatio = (float)backgroundImage.Width / backgroundImage.Height;
int width = bmpResult.Width;
int height = (int)(width / aspectRatio);
if (height < bmpResult.Height)
{
height = bmpResult.Height;
width = (int)(height * aspectRatio);
}
int x = 0;
int y = 0;
if (center)
{
x = (bmpResult.Width - width) / 2;
y = (bmpResult.Height - height) / 2;
}
g.DrawImage(backgroundImage, x, y, width, height);
}
g.DrawImage(bmp, 0, 0, bmp.Width, bmp.Height);
}
return bmpResult;
}
}
return bmp;
}
public static Bitmap DrawBackgroundImage(Bitmap bmp, string backgroundImageFilePath, bool center = true, bool tile = false)
{
Bitmap backgroundImage = LoadImage(backgroundImageFilePath);
return DrawBackgroundImage(bmp, backgroundImage, center, tile);
}
public static Bitmap RoundedCorners(Bitmap bmp, int cornerRadius)
{
Bitmap bmpResult = bmp.CreateEmptyBitmap();
using (bmp)
using (Graphics g = Graphics.FromImage(bmpResult))
{
g.SmoothingMode = SmoothingMode.HighQuality;
g.PixelOffsetMode = PixelOffsetMode.Half;
using (GraphicsPath gp = new GraphicsPath())
{
gp.AddRoundedRectangleProper(new RectangleF(0, 0, bmp.Width, bmp.Height), cornerRadius, 0);
using (TextureBrush brush = new TextureBrush(bmp))
{
g.FillPath(brush, gp);
}
}
}
return bmpResult;
}
public static Bitmap OutlineOld(Bitmap bmp, int borderSize, Color borderColor)
{
Bitmap bmpResult = bmp.CreateEmptyBitmap(borderSize * 2, borderSize * 2);
ColorMatrix maskMatrix = new ColorMatrix();
maskMatrix.Matrix00 = 0;
maskMatrix.Matrix11 = 0;
maskMatrix.Matrix22 = 0;
maskMatrix.Matrix33 = 1;
maskMatrix.Matrix40 = ((float)borderColor.R).Remap(0, 255, 0, 1);
maskMatrix.Matrix41 = ((float)borderColor.G).Remap(0, 255, 0, 1);
maskMatrix.Matrix42 = ((float)borderColor.B).Remap(0, 255, 0, 1);
using (bmp)
using (Image shadow = maskMatrix.Apply(bmp))
using (Graphics g = Graphics.FromImage(bmpResult))
{
for (int i = 0; i <= borderSize * 2; i++)
{
g.DrawImage(shadow, new Rectangle(i, 0, shadow.Width, shadow.Height));
g.DrawImage(shadow, new Rectangle(i, borderSize * 2, shadow.Width, shadow.Height));
g.DrawImage(shadow, new Rectangle(0, i, shadow.Width, shadow.Height));
g.DrawImage(shadow, new Rectangle(borderSize * 2, i, shadow.Width, shadow.Height));
}
g.DrawImage(bmp, new Rectangle(borderSize, borderSize, bmp.Width, bmp.Height));
}
return bmpResult;
}
public static Bitmap Outline(Bitmap bmp, int borderSize, Color borderColor, int padding = 0, bool outlineOnly = false)
{
Bitmap outline = MakeOutline(bmp, padding, padding + borderSize + 1, borderColor);
if (outlineOnly)
{
bmp.Dispose();
return outline;
}
else
{
using (outline)
using (Graphics g = Graphics.FromImage(bmp))
{
g.DrawImage(outline, 0, 0, outline.Width, outline.Height);
}
return bmp;
}
}
public static Bitmap MakeOutline(Bitmap bmp, int minRadius, int maxRadius, Color color)
{
Bitmap bmpResult = bmp.CreateEmptyBitmap();
using (UnsafeBitmap source = new UnsafeBitmap(bmp, true, ImageLockMode.ReadOnly))
using (UnsafeBitmap dest = new UnsafeBitmap(bmpResult, true, ImageLockMode.WriteOnly))
{
for (int x = 0; x < source.Width; x++)
{
for (int y = 0; y < source.Height; y++)
{
float dist = DistanceToThreshold(source, x, y, maxRadius, 255);
if (dist > minRadius && dist < maxRadius)
{
byte alpha = 255;
if (dist - minRadius < 1)
{
alpha = (byte)(255 * (dist - minRadius));
}
else if (maxRadius - dist < 1)
{
alpha = (byte)(255 * (maxRadius - dist));
}
ColorBgra bgra = new ColorBgra(color.B, color.G, color.R, alpha);
dest.SetPixel(x, y, bgra);
}
}
}
}
return bmpResult;
}
private static float DistanceToThreshold(UnsafeBitmap unsafeBitmap, int x, int y, int radius, int threshold)
{
int minx = Math.Max(x - radius, 0);
int maxx = Math.Min(x + radius, unsafeBitmap.Width - 1);
int miny = Math.Max(y - radius, 0);
int maxy = Math.Min(y + radius, unsafeBitmap.Height - 1);
int dist2 = (radius * radius) + 1;
for (int tx = minx; tx <= maxx; tx++)
{
for (int ty = miny; ty <= maxy; ty++)
{
ColorBgra color = unsafeBitmap.GetPixel(tx, ty);
if (color.Alpha >= threshold)
{
int dx = tx - x;
int dy = ty - y;
int test_dist2 = (dx * dx) + (dy * dy);
if (test_dist2 < dist2)
{
dist2 = test_dist2;
}
}
}
}
return (float)Math.Sqrt(dist2);
}
public static Bitmap DrawReflection(Bitmap bmp, int percentage, int maxAlpha, int minAlpha, int offset, bool skew, int skewSize)
{
Bitmap reflection = AddReflection(bmp, percentage, maxAlpha, minAlpha);
if (skew)
{
reflection = AddSkew(reflection, skewSize, 0);
}
Bitmap bmpResult = new Bitmap(reflection.Width, bmp.Height + reflection.Height + offset);
using (bmp)
using (reflection)
using (Graphics g = Graphics.FromImage(bmpResult))
{
g.SetHighQuality();
g.DrawImage(bmp, 0, 0, bmp.Width, bmp.Height);
g.DrawImage(reflection, 0, bmp.Height + offset, reflection.Width, reflection.Height);
}
return bmpResult;
}
public static Bitmap AddSkew(Image img, int x, int y)
{
Bitmap result = img.CreateEmptyBitmap(Math.Abs(x), Math.Abs(y));
using (img)
using (Graphics g = Graphics.FromImage(result))
{
g.SetHighQuality();
int startX = -Math.Min(0, x);
int startY = -Math.Min(0, y);
int endX = Math.Max(0, x);
int endY = Math.Max(0, y);
Point[] destinationPoints = { new Point(startX, startY), new Point(startX + img.Width - 1, endY), new Point(endX, startY + img.Height - 1) };
g.DrawImage(img, destinationPoints);
}
return result;
}
public static Bitmap AddReflection(Image img, int percentage, int maxAlpha, int minAlpha)
{
percentage = percentage.Clamp(1, 100);
maxAlpha = maxAlpha.Clamp(0, 255);
minAlpha = minAlpha.Clamp(0, 255);
Bitmap reflection;
using (Bitmap bitmapRotate = (Bitmap)img.Clone())
{
bitmapRotate.RotateFlip(RotateFlipType.RotateNoneFlipY);
reflection = bitmapRotate.Clone(new Rectangle(0, 0, bitmapRotate.Width, (int)(bitmapRotate.Height * ((float)percentage / 100))), PixelFormat.Format32bppArgb);
}
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(reflection, true))
{
int alphaAdd = maxAlpha - minAlpha;
float reflectionHeight = reflection.Height - 1;
for (int y = 0; y < reflection.Height; ++y)
{
for (int x = 0; x < reflection.Width; ++x)
{
ColorBgra color = unsafeBitmap.GetPixel(x, y);
byte alpha = (byte)(maxAlpha - (alphaAdd * (y / reflectionHeight)));
if (color.Alpha > alpha)
{
color.Alpha = alpha;
unsafeBitmap.SetPixel(x, y, color);
}
}
}
}
return reflection;
}
public static Bitmap DrawBorder(Bitmap bmp, Color borderColor, int borderSize, BorderType borderType, DashStyle dashStyle = DashStyle.Solid)
{
using (Pen borderPen = new Pen(borderColor, borderSize) { Alignment = PenAlignment.Inset, DashStyle = dashStyle })
{
return DrawBorder(bmp, borderPen, borderType);
}
}
public static Bitmap DrawBorder(Bitmap bmp, Color fromBorderColor, Color toBorderColor, LinearGradientMode gradientType, int borderSize, BorderType borderType,
DashStyle dashStyle = DashStyle.Solid)
{
int width = bmp.Width;
int height = bmp.Height;
if (borderType == BorderType.Outside)
{
width += borderSize * 2;
height += borderSize * 2;
}
using (LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, width, height), fromBorderColor, toBorderColor, gradientType))
using (Pen borderPen = new Pen(brush, borderSize) { Alignment = PenAlignment.Inset, DashStyle = dashStyle })
{
return DrawBorder(bmp, borderPen, borderType);
}
}
public static Bitmap DrawBorder(Bitmap bmp, GradientInfo gradientInfo, int borderSize, BorderType borderType, DashStyle dashStyle = DashStyle.Solid)
{
int width = bmp.Width;
int height = bmp.Height;
if (borderType == BorderType.Outside)
{
width += borderSize * 2;
height += borderSize * 2;
}
using (LinearGradientBrush brush = gradientInfo.GetGradientBrush(new Rectangle(0, 0, width, height)))
using (Pen borderPen = new Pen(brush, borderSize) { Alignment = PenAlignment.Inset, DashStyle = dashStyle })
{
return DrawBorder(bmp, borderPen, borderType);
}
}
public static Bitmap DrawBorder(Bitmap bmp, Pen borderPen, BorderType borderType)
{
Bitmap bmpResult;
if (borderType == BorderType.Inside)
{
bmpResult = bmp;
using (Graphics g = Graphics.FromImage(bmpResult))
{
g.DrawRectangleProper(borderPen, 0, 0, bmp.Width, bmp.Height);
}
}
else
{
int borderSize = (int)borderPen.Width;
bmpResult = bmp.CreateEmptyBitmap(borderSize * 2, borderSize * 2);
using (bmp)
using (Graphics g = Graphics.FromImage(bmpResult))
{
g.DrawRectangleProper(borderPen, 0, 0, bmpResult.Width, bmpResult.Height);
g.SetHighQuality();
g.DrawImage(bmp, borderSize, borderSize, bmp.Width, bmp.Height);
}
}
return bmpResult;
}
public static Bitmap CreateBitmap(int width, int height, Color color)
{
if (width > 0 && height > 0)
{
Bitmap bmp = new Bitmap(width, height, PixelFormat.Format32bppArgb);
using (Graphics g = Graphics.FromImage(bmp))
{
g.Clear(color);
}
return bmp;
}
return null;
}
public static Bitmap FillBackground(Image img, Color color)
{
using (Brush brush = new SolidBrush(color))
{
return FillBackground(img, brush);
}
}
public static Bitmap FillBackground(Image img, Color fromColor, Color toColor, LinearGradientMode gradientType)
{
using (LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, img.Width, img.Height), fromColor, toColor, gradientType))
{
return FillBackground(img, brush);
}
}
public static Bitmap FillBackground(Image img, GradientInfo gradientInfo)
{
using (LinearGradientBrush brush = gradientInfo.GetGradientBrush(new Rectangle(0, 0, img.Width, img.Height)))
{
return FillBackground(img, brush);
}
}
public static Bitmap FillBackground(Image img, Brush brush)
{
Bitmap result = img.CreateEmptyBitmap();
using (Graphics g = Graphics.FromImage(result))
{
g.FillRectangle(brush, 0, 0, result.Width, result.Height);
g.DrawImage(img, 0, 0, result.Width, result.Height);
}
return result;
}
public static Bitmap DrawCheckers(Image img)
{
return DrawCheckers(img, 10, SystemColors.ControlLight, SystemColors.ControlLightLight);
}
public static Bitmap DrawCheckers(Image img, int checkerSize, Color checkerColor1, Color checkerColor2)
{
Bitmap bmpResult = img.CreateEmptyBitmap();
using (img)
using (Graphics g = Graphics.FromImage(bmpResult))
using (Image checker = CreateCheckerPattern(checkerSize, checkerSize, checkerColor1, checkerColor2))
using (Brush checkerBrush = new TextureBrush(checker, WrapMode.Tile))
{
g.FillRectangle(checkerBrush, new Rectangle(0, 0, bmpResult.Width, bmpResult.Height));
g.SetHighQuality();
g.DrawImage(img, 0, 0, img.Width, img.Height);
}
return bmpResult;
}
public static Bitmap DrawCheckers(int width, int height)
{
return DrawCheckers(width, height, 10, SystemColors.ControlLight, SystemColors.ControlLightLight);
}
public static Bitmap DrawCheckers(int width, int height, int checkerSize, Color checkerColor1, Color checkerColor2)
{
Bitmap bmp = new Bitmap(width, height);
using (Graphics g = Graphics.FromImage(bmp))
using (Image checker = CreateCheckerPattern(checkerSize, checkerSize, checkerColor1, checkerColor2))
using (Brush checkerBrush = new TextureBrush(checker, WrapMode.Tile))
{
g.FillRectangle(checkerBrush, new Rectangle(0, 0, bmp.Width, bmp.Height));
}
return bmp;
}
public static Bitmap CreateCheckerPattern()
{
return CreateCheckerPattern(10, 10);
}
public static Bitmap CreateCheckerPattern(int width, int height)
{
return CreateCheckerPattern(width, height, SystemColors.ControlLight, SystemColors.ControlLightLight);
}
public static Bitmap CreateCheckerPattern(int width, int height, Color checkerColor1, Color checkerColor2)
{
Bitmap bmp = new Bitmap(width * 2, height * 2);
using (Graphics g = Graphics.FromImage(bmp))
using (Brush brush1 = new SolidBrush(checkerColor1))
using (Brush brush2 = new SolidBrush(checkerColor2))
{
g.FillRectangle(brush1, 0, 0, width, height);
g.FillRectangle(brush1, width, height, width, height);
g.FillRectangle(brush2, width, 0, width, height);
g.FillRectangle(brush2, 0, height, width, height);
}
return bmp;
}
public static bool CompareImages(Bitmap bmp1, Bitmap bmp2)
{
if (bmp1 != null && bmp2 != null && bmp1.Width == bmp2.Width && bmp1.Height == bmp2.Height)
{
BitmapData bd1 = bmp1.LockBits(new Rectangle(0, 0, bmp1.Width, bmp1.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
BitmapData bd2 = bmp2.LockBits(new Rectangle(0, 0, bmp2.Width, bmp2.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
try
{
return NativeMethods.memcmp(bd1.Scan0, bd2.Scan0, bd1.Stride * bmp1.Height) == 0;
}
finally
{
bmp1.UnlockBits(bd1);
bmp2.UnlockBits(bd2);
}
}
return false;
}
public static bool IsImageTransparent(Bitmap bmp)
{
if (bmp.PixelFormat == PixelFormat.Format32bppArgb || bmp.PixelFormat == PixelFormat.Format32bppPArgb)
{
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true, ImageLockMode.ReadOnly))
{
return unsafeBitmap.IsTransparent();
}
}
return false;
}
public static bool AddMetadata(Image img, int id, string text)
{
try
{
PropertyItem pi = (PropertyItem)typeof(PropertyItem).GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, null, new Type[] { }, null).Invoke(null);
pi.Id = id;
pi.Len = text.Length + 1;
pi.Type = 2;
byte[] bytesText = Encoding.ASCII.GetBytes(text + " ");
bytesText[bytesText.Length - 1] = 0;
pi.Value = bytesText;
img.SetPropertyItem(pi);
return true;
}
catch (Exception e)
{
DebugHelper.WriteException(e, "AddMetadata reflection failed.");
}
return false;
}
public static void CopyMetadata(Image fromImage, Image toImage)
{
PropertyItem[] propertyItems = fromImage.PropertyItems;
foreach (PropertyItem pi in propertyItems)
{
try
{
toImage.SetPropertyItem(pi);
}
catch (Exception e)
{
DebugHelper.WriteException(e);
}
}
}
///
/// Method to rotate an Image object. The result can be one of three cases:
/// - upsizeOk = true: output image will be larger than the input and no clipping occurs
/// - upsizeOk = false & clipOk = true: output same size as input, clipping occurs
/// - upsizeOk = false & clipOk = false: output same size as input, image reduced, no clipping
///
/// Note that this method always returns a new Bitmap object, even if rotation is zero - in
/// which case the returned object is a clone of the input object.
///
/// input Image object, is not modified
/// angle of rotation, in degrees
/// see comments above
/// see comments above, not used if upsizeOk = true
/// new Bitmap object, may be larger than input image
public static Bitmap RotateImage(Bitmap bmp, float angleDegrees, bool upsize, bool clip)
{
// Test for zero rotation and return a clone of the input image
if (angleDegrees == 0f)
{
return (Bitmap)bmp.Clone();
}
// Set up old and new image dimensions, assuming upsizing not wanted and clipping OK
int oldWidth = bmp.Width;
int oldHeight = bmp.Height;
int newWidth = oldWidth;
int newHeight = oldHeight;
float scaleFactor = 1f;
// If upsizing wanted or clipping not OK calculate the size of the resulting bitmap
if (upsize || !clip)
{
double angleRadians = angleDegrees * Math.PI / 180d;
double cos = Math.Abs(Math.Cos(angleRadians));
double sin = Math.Abs(Math.Sin(angleRadians));
newWidth = (int)Math.Round((oldWidth * cos) + (oldHeight * sin));
newHeight = (int)Math.Round((oldWidth * sin) + (oldHeight * cos));
}
// If upsizing not wanted and clipping not OK need a scaling factor
if (!upsize && !clip)
{
scaleFactor = Math.Min((float)oldWidth / newWidth, (float)oldHeight / newHeight);
newWidth = oldWidth;
newHeight = oldHeight;
}
// Create the new bitmap object.
Bitmap bmpResult = bmp.CreateEmptyBitmap();
// Create the Graphics object that does the work
using (Graphics g = Graphics.FromImage(bmpResult))
{
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
g.SmoothingMode = SmoothingMode.HighQuality;
// Set up the built-in transformation matrix to do the rotation and maybe scaling
g.TranslateTransform(newWidth / 2f, newHeight / 2f);
if (scaleFactor != 1f)
{
g.ScaleTransform(scaleFactor, scaleFactor);
}
g.RotateTransform(angleDegrees);
g.TranslateTransform(-oldWidth / 2f, -oldHeight / 2f);
// Draw the result
g.DrawImage(bmp, 0, 0, bmp.Width, bmp.Height);
}
return bmpResult;
}
public static Bitmap AddShadow(Bitmap bmp, float opacity, int size)
{
return AddShadow(bmp, opacity, size, 1, Color.Black, new Point(0, 0));
}
public static Bitmap AddShadow(Bitmap bmp, float opacity, int size, float darkness, Color color, Point offset, bool autoResize = true)
{
Bitmap bmpShadow = null;
try
{
bmpShadow = bmp.CreateEmptyBitmap(size * 2, size * 2);
Rectangle shadowRectangle = new Rectangle(size, size, bmp.Width, bmp.Height);
ColorMatrixManager.Mask(opacity, color).Apply(bmp, bmpShadow, shadowRectangle);
if (size > 0)
{
BoxBlur(bmpShadow, size);
}
if (darkness > 1)
{
Bitmap shadowImage2 = ColorMatrixManager.Alpha(darkness).Apply(bmpShadow);
bmpShadow.Dispose();
bmpShadow = shadowImage2;
}
Bitmap bmpResult;
if (autoResize)
{
bmpResult = bmpShadow.CreateEmptyBitmap(Math.Abs(offset.X), Math.Abs(offset.Y));
using (Graphics g = Graphics.FromImage(bmpResult))
{
g.SetHighQuality();
g.DrawImage(bmpShadow, Math.Max(0, offset.X), Math.Max(0, offset.Y), bmpShadow.Width, bmpShadow.Height);
g.DrawImage(bmp, Math.Max(size, -offset.X + size), Math.Max(size, -offset.Y + size), bmp.Width, bmp.Height);
}
}
else
{
bmpResult = bmp.CreateEmptyBitmap();
using (Graphics g = Graphics.FromImage(bmpResult))
{
g.SetHighQuality();
g.DrawImage(bmpShadow, -size + offset.X, -size + offset.Y, bmpShadow.Width, bmpShadow.Height);
g.DrawImage(bmp, 0, 0, bmp.Width, bmp.Height);
}
}
return bmpResult;
}
finally
{
bmp?.Dispose();
bmpShadow?.Dispose();
}
}
public static Bitmap AddGlow(Bitmap bmp, int size, float strength, Color color, Point offset, GradientInfo gradient = null)
{
if (size < 0 || strength < 0.1f)
{
return bmp;
}
Bitmap bmpBlur = null, bmpMask = null;
try
{
if (size > 0)
{
bmpBlur = AddCanvas(bmp, size);
BoxBlur(bmpBlur, size);
}
else
{
bmpBlur = bmp;
}
if (gradient != null && gradient.IsValid)
{
bmpMask = CreateGradientMask(bmpBlur, gradient, strength);
}
else
{
bmpMask = ColorMatrixManager.Mask(strength, color).Apply(bmpBlur);
}
Bitmap bmpResult = bmpMask.CreateEmptyBitmap(Math.Abs(offset.X), Math.Abs(offset.Y));
using (Graphics g = Graphics.FromImage(bmpResult))
{
g.SetHighQuality();
g.DrawImage(bmpMask, Math.Max(0, offset.X), Math.Max(0, offset.Y), bmpMask.Width, bmpMask.Height);
g.DrawImage(bmp, Math.Max(size, -offset.X + size), Math.Max(size, -offset.Y + size), bmp.Width, bmp.Height);
}
return bmpResult;
}
finally
{
bmp?.Dispose();
bmpBlur?.Dispose();
bmpMask?.Dispose();
}
}
public static Bitmap CreateGradientMask(Bitmap bmp, GradientInfo gradient, float opacity = 1f)
{
Bitmap mask = bmp.CreateEmptyBitmap();
if (opacity <= 0)
{
return mask;
}
gradient.Draw(mask);
using (UnsafeBitmap bmpSource = new UnsafeBitmap(bmp, true, ImageLockMode.ReadOnly))
using (UnsafeBitmap bmpMask = new UnsafeBitmap(mask, true, ImageLockMode.ReadWrite))
{
int pixelCount = bmpSource.PixelCount;
for (int i = 0; i < pixelCount; i++)
{
ColorBgra sourceColor = bmpSource.GetPixel(i);
ColorBgra maskColor = bmpMask.GetPixel(i);
maskColor.Alpha = (byte)Math.Min(255, sourceColor.Alpha * (maskColor.Alpha / 255f) * opacity);
bmpMask.SetPixel(i, maskColor);
}
}
return mask;
}
public static Bitmap Sharpen(Bitmap bmp, double strength)
{
if (bmp != null)
{
using (bmp)
{
Bitmap sharpenImage = (Bitmap)bmp.Clone();
int width = sharpenImage.Width;
int height = sharpenImage.Height;
// Create sharpening filter.
const int filterSize = 5;
double[,] filter = new double[,]
{
{ -1, -1, -1, -1, -1 },
{ -1, 2, 2, 2, -1 },
{ -1, 2, 16, 2, -1 },
{ -1, 2, 2, 2, -1 },
{ -1, -1, -1, -1, -1 }
};
double bias = 1.0 - strength;
double factor = strength / 16.0;
const int s = filterSize / 2;
Color[,] result = new Color[sharpenImage.Width, sharpenImage.Height];
// Lock image bits for read/write.
BitmapData pbits = sharpenImage.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
// Declare an array to hold the bytes of the bitmap.
int bytes = pbits.Stride * height;
byte[] rgbValues = new byte[bytes];
// Copy the RGB values into the array.
Marshal.Copy(pbits.Scan0, rgbValues, 0, bytes);
int rgb;
// Fill the color array with the new sharpened color values.
for (int x = s; x < width - s; x++)
{
for (int y = s; y < height - s; y++)
{
double red = 0.0, green = 0.0, blue = 0.0;
for (int filterX = 0; filterX < filterSize; filterX++)
{
for (int filterY = 0; filterY < filterSize; filterY++)
{
int imageX = (x - s + filterX + width) % width;
int imageY = (y - s + filterY + height) % height;
rgb = (imageY * pbits.Stride) + (3 * imageX);
red += rgbValues[rgb + 2] * filter[filterX, filterY];
green += rgbValues[rgb + 1] * filter[filterX, filterY];
blue += rgbValues[rgb + 0] * filter[filterX, filterY];
}
rgb = (y * pbits.Stride) + (3 * x);
int r = Math.Min(Math.Max((int)((factor * red) + (bias * rgbValues[rgb + 2])), 0), 255);
int g = Math.Min(Math.Max((int)((factor * green) + (bias * rgbValues[rgb + 1])), 0), 255);
int b = Math.Min(Math.Max((int)((factor * blue) + (bias * rgbValues[rgb + 0])), 0), 255);
result[x, y] = Color.FromArgb(r, g, b);
}
}
}
// Update the image with the sharpened pixels.
for (int x = s; x < width - s; x++)
{
for (int y = s; y < height - s; y++)
{
rgb = (y * pbits.Stride) + (3 * x);
rgbValues[rgb + 2] = result[x, y].R;
rgbValues[rgb + 1] = result[x, y].G;
rgbValues[rgb + 0] = result[x, y].B;
}
}
// Copy the RGB values back to the bitmap.
Marshal.Copy(rgbValues, 0, pbits.Scan0, bytes);
// Release image bits.
sharpenImage.UnlockBits(pbits);
return sharpenImage;
}
}
return null;
}
public static void HighlightImage(Bitmap bmp)
{
HighlightImage(bmp, new Rectangle(0, 0, bmp.Width, bmp.Height));
}
public static void HighlightImage(Bitmap bmp, Color highlightColor)
{
HighlightImage(bmp, new Rectangle(0, 0, bmp.Width, bmp.Height), highlightColor);
}
public static void HighlightImage(Bitmap bmp, Rectangle rect)
{
HighlightImage(bmp, rect, Color.Yellow);
}
public static void HighlightImage(Bitmap bmp, Rectangle rect, Color highlightColor)
{
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true))
{
for (int y = rect.Y; y < rect.Height; y++)
{
for (int x = rect.X; x < rect.Width; x++)
{
ColorBgra color = unsafeBitmap.GetPixel(x, y);
color.Red = Math.Min(color.Red, highlightColor.R);
color.Green = Math.Min(color.Green, highlightColor.G);
color.Blue = Math.Min(color.Blue, highlightColor.B);
unsafeBitmap.SetPixel(x, y, color);
}
}
}
}
public static void Pixelate(Bitmap bmp, int pixelSize)
{
if (pixelSize > 1)
{
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true))
{
for (int y = 0; y < unsafeBitmap.Height; y += pixelSize)
{
for (int x = 0; x < unsafeBitmap.Width; x += pixelSize)
{
int xLimit = Math.Min(x + pixelSize, unsafeBitmap.Width);
int yLimit = Math.Min(y + pixelSize, unsafeBitmap.Height);
int pixelCount = (xLimit - x) * (yLimit - y);
float r = 0, g = 0, b = 0, a = 0;
float weightedCount = 0;
for (int y2 = y; y2 < yLimit; y2++)
{
for (int x2 = x; x2 < xLimit; x2++)
{
ColorBgra color = unsafeBitmap.GetPixel(x2, y2);
float pixelWeight = color.Alpha / 255f;
r += color.Red * pixelWeight;
g += color.Green * pixelWeight;
b += color.Blue * pixelWeight;
a += color.Alpha * pixelWeight;
weightedCount += pixelWeight;
}
}
ColorBgra averageColor = new ColorBgra((byte)(b / weightedCount), (byte)(g / weightedCount), (byte)(r / weightedCount), (byte)(a / pixelCount));
for (int y2 = y; y2 < yLimit; y2++)
{
for (int x2 = x; x2 < xLimit; x2++)
{
unsafeBitmap.SetPixel(x2, y2, averageColor);
}
}
}
}
}
}
}
public static void Pixelate(Bitmap bmp, int pixelSize, int borderSize, Color borderColor)
{
Pixelate(bmp, pixelSize);
if (pixelSize > 1 && borderSize > 0 && borderColor.A > 0)
{
using (Bitmap bmpTexture = new Bitmap(pixelSize, pixelSize))
{
using (Graphics g = Graphics.FromImage(bmpTexture))
using (Pen pen = new Pen(borderColor, borderSize) { Alignment = PenAlignment.Inset })
{
g.DrawRectangleProper(pen, new Rectangle(0, 0, bmpTexture.Width, bmpTexture.Height));
}
using (Graphics g = Graphics.FromImage(bmp))
using (TextureBrush brush = new TextureBrush(bmpTexture))
{
g.FillRectangle(brush, 0, 0, bmp.Width, bmp.Height);
}
}
}
}
public static void BoxBlur(Bitmap bmp, int range)
{
BoxBlur(bmp, range, new Rectangle(0, 0, bmp.Width, bmp.Height));
}
// https://lotsacode.wordpress.com/2010/12/08/fast-blur-box-blur-with-accumulator/
public static void BoxBlur(Bitmap bmp, int range, Rectangle rect)
{
if (range > 1)
{
if (range.IsEvenNumber())
{
range++;
}
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true))
{
BoxBlurHorizontal(unsafeBitmap, range, rect);
BoxBlurVertical(unsafeBitmap, range, rect);
BoxBlurHorizontal(unsafeBitmap, range, rect);
BoxBlurVertical(unsafeBitmap, range, rect);
}
}
}
private static void BoxBlurHorizontal(UnsafeBitmap unsafeBitmap, int range, Rectangle rect)
{
int left = rect.X;
int top = rect.Y;
int right = rect.Right;
int bottom = rect.Bottom;
int halfRange = range / 2;
ColorBgra[] newColors = new ColorBgra[unsafeBitmap.Width];
for (int y = top; y < bottom; y++)
{
int hits = 0;
int r = 0;
int g = 0;
int b = 0;
int a = 0;
for (int x = left - halfRange; x < right; x++)
{
int oldPixel = x - halfRange - 1;
if (oldPixel >= left)
{
ColorBgra color = unsafeBitmap.GetPixel(oldPixel, y);
if (color.Bgra != 0)
{
r -= color.Red;
g -= color.Green;
b -= color.Blue;
a -= color.Alpha;
}
hits--;
}
int newPixel = x + halfRange;
if (newPixel < right)
{
ColorBgra color = unsafeBitmap.GetPixel(newPixel, y);
if (color.Bgra != 0)
{
r += color.Red;
g += color.Green;
b += color.Blue;
a += color.Alpha;
}
hits++;
}
if (x >= left)
{
newColors[x] = new ColorBgra((byte)(b / hits), (byte)(g / hits), (byte)(r / hits), (byte)(a / hits));
}
}
for (int x = left; x < right; x++)
{
unsafeBitmap.SetPixel(x, y, newColors[x]);
}
}
}
private static void BoxBlurVertical(UnsafeBitmap unsafeBitmap, int range, Rectangle rect)
{
int left = rect.X;
int top = rect.Y;
int right = rect.Right;
int bottom = rect.Bottom;
int halfRange = range / 2;
ColorBgra[] newColors = new ColorBgra[unsafeBitmap.Height];
for (int x = left; x < right; x++)
{
int hits = 0;
int r = 0;
int g = 0;
int b = 0;
int a = 0;
for (int y = top - halfRange; y < bottom; y++)
{
int oldPixel = y - halfRange - 1;
if (oldPixel >= top)
{
ColorBgra color = unsafeBitmap.GetPixel(x, oldPixel);
if (color.Bgra != 0)
{
r -= color.Red;
g -= color.Green;
b -= color.Blue;
a -= color.Alpha;
}
hits--;
}
int newPixel = y + halfRange;
if (newPixel < bottom)
{
ColorBgra color = unsafeBitmap.GetPixel(x, newPixel);
if (color.Bgra != 0)
{
r += color.Red;
g += color.Green;
b += color.Blue;
a += color.Alpha;
}
hits++;
}
if (y >= top)
{
newColors[y] = new ColorBgra((byte)(b / hits), (byte)(g / hits), (byte)(r / hits), (byte)(a / hits));
}
}
for (int y = top; y < bottom; y++)
{
unsafeBitmap.SetPixel(x, y, newColors[y]);
}
}
}
public static Bitmap GaussianBlur(Bitmap bmp, int radius)
{
int size = radius * 2 + 1;
double sigma = radius / 3.0;
ConvolutionMatrix kernelHorizontal = ConvolutionMatrixManager.GaussianBlur(1, size, sigma);
ConvolutionMatrix kernelVertical = new ConvolutionMatrix(size, 1)
{
ConsiderAlpha = kernelHorizontal.ConsiderAlpha
};
for (int i = 0; i < size; i++)
{
kernelVertical[i, 0] = kernelHorizontal[0, i];
}
using (Bitmap horizontalPass = kernelHorizontal.Apply(bmp))
{
return kernelVertical.Apply(horizontalPass);
}
}
public static void ColorDepth(Bitmap bmp, int bitsPerChannel = 4)
{
if (bitsPerChannel < 1 || bitsPerChannel > 8)
{
return;
}
double colorsPerChannel = Math.Pow(2, bitsPerChannel);
double colorInterval = 255 / (colorsPerChannel - 1);
byte Remap(byte color, double interval)
{
return (byte)Math.Round(Math.Round(color / interval) * interval);
}
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true))
{
for (int y = 0; y < unsafeBitmap.Height; y++)
{
for (int x = 0; x < unsafeBitmap.Width; x++)
{
ColorBgra color = unsafeBitmap.GetPixel(x, y);
color.Red = Remap(color.Red, colorInterval);
color.Green = Remap(color.Green, colorInterval);
color.Blue = Remap(color.Blue, colorInterval);
unsafeBitmap.SetPixel(x, y, color);
}
}
}
}
// http://incubator.quasimondo.com/processing/superfast_blur.php
public static void FastBoxBlur(Bitmap bmp, int radius)
{
if (radius < 1) return;
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true))
{
int w = unsafeBitmap.Width;
int h = unsafeBitmap.Height;
int wm = w - 1;
int hm = h - 1;
int wh = w * h;
int div = radius + radius + 1;
byte[] r = new byte[wh];
byte[] g = new byte[wh];
byte[] b = new byte[wh];
byte[] a = new byte[wh];
int rsum, gsum, bsum, asum, x, y, i, p, p1, p2, yp, yi, yw;
int[] vmin = new int[Math.Max(w, h)];
int[] vmax = new int[Math.Max(w, h)];
byte[] dv = new byte[256 * div];
for (i = 0; i < 256 * div; i++)
{
dv[i] = (byte)(i / div);
}
yw = yi = 0;
for (y = 0; y < h; y++)
{
rsum = gsum = bsum = asum = 0;
for (i = -radius; i <= radius; i++)
{
p = (yi + Math.Min(wm, Math.Max(i, 0)));
ColorBgra color = unsafeBitmap.GetPixel(p);
rsum += color.Red;
gsum += color.Green;
bsum += color.Blue;
asum += color.Alpha;
}
for (x = 0; x < w; x++)
{
r[yi] = dv[rsum];
g[yi] = dv[gsum];
b[yi] = dv[bsum];
a[yi] = dv[asum];
if (y == 0)
{
vmin[x] = Math.Min(x + radius + 1, wm);
vmax[x] = Math.Max(x - radius, 0);
}
p1 = (yw + vmin[x]);
p2 = (yw + vmax[x]);
ColorBgra color1 = unsafeBitmap.GetPixel(p1);
ColorBgra color2 = unsafeBitmap.GetPixel(p2);
rsum += color1.Red - color2.Red;
gsum += color1.Green - color2.Green;
bsum += color1.Blue - color2.Blue;
asum += color1.Alpha - color2.Alpha;
yi++;
}
yw += w;
}
for (x = 0; x < w; x++)
{
rsum = gsum = bsum = asum = 0;
yp = -radius * w;
for (i = -radius; i <= radius; i++)
{
yi = Math.Max(0, yp) + x;
rsum += r[yi];
gsum += g[yi];
bsum += b[yi];
asum += a[yi];
yp += w;
}
yi = x;
for (y = 0; y < h; y++)
{
ColorBgra color = new ColorBgra(dv[bsum], dv[gsum], dv[rsum], dv[asum]);
unsafeBitmap.SetPixel(yi, color);
if (x == 0)
{
vmin[y] = Math.Min(y + radius + 1, hm) * w;
vmax[y] = Math.Max(y - radius, 0) * w;
}
p1 = x + vmin[y];
p2 = x + vmax[y];
rsum += r[p1] - r[p2];
gsum += g[p1] - g[p2];
bsum += b[p1] - b[p2];
asum += a[p1] - a[p2];
yi += w;
}
}
}
}
public static Bitmap WavyEdges(Bitmap bmp, int waveDepth, int waveRange, AnchorStyles sides, Color cutOutBackgroundColor)
{
if (waveDepth < 1 || waveRange < 1 || sides == AnchorStyles.None)
{
return bmp;
}
List points = new List();
int horizontalWaveCount = Math.Max(2, (bmp.Width / waveRange + 1) / 2 * 2) - 1;
int verticalWaveCount = Math.Max(2, (bmp.Height / waveRange + 1) / 2 * 2) - 1;
int horizontalWaveRange = bmp.Width / horizontalWaveCount;
int verticalWaveRange = bmp.Height / verticalWaveCount;
int step = Math.Min(Math.Max(1, waveRange / waveDepth), 10);
int waveFunction(int t, int max, int depth) => (int)((1 - Math.Cos(t * Math.PI / max)) * depth / 2);
if (sides.HasFlag(AnchorStyles.Top))
{
int startX = sides.HasFlag(AnchorStyles.Left) ? waveDepth : 0;
int endX = sides.HasFlag(AnchorStyles.Right) ? bmp.Width - waveDepth : bmp.Width;
for (int x = startX; x < endX; x += step)
{
points.Add(new Point(x, waveFunction(x, horizontalWaveRange, waveDepth)));
}
points.Add(new Point(endX, waveFunction(endX, horizontalWaveRange, waveDepth)));
}
else
{
points.Add(new Point(0, 0));
}
if (sides.HasFlag(AnchorStyles.Right))
{
int startY = sides.HasFlag(AnchorStyles.Top) ? waveDepth : 0;
int endY = sides.HasFlag(AnchorStyles.Bottom) ? bmp.Height - waveDepth : bmp.Height;
for (int y = startY; y < endY; y += step)
{
points.Add(new Point(bmp.Width - waveDepth + waveFunction(y, verticalWaveRange, waveDepth), y));
}
points.Add(new Point(bmp.Width - waveDepth + waveFunction(endY, verticalWaveRange, waveDepth), endY));
}
else
{
points.Add(new Point(bmp.Width, points[points.Count - 1].Y));
}
if (sides.HasFlag(AnchorStyles.Bottom))
{
int startX = sides.HasFlag(AnchorStyles.Right) ? bmp.Width - waveDepth : bmp.Width;
int endX = sides.HasFlag(AnchorStyles.Left) ? waveDepth : 0;
for (int x = startX; x >= endX; x -= step)
{
points.Add(new Point(x, bmp.Height - waveDepth + waveFunction(x, horizontalWaveRange, waveDepth)));
}
points.Add(new Point(endX, bmp.Height - waveDepth + waveFunction(endX, horizontalWaveRange, waveDepth)));
}
else
{
points.Add(new Point(points[points.Count - 1].X, bmp.Height));
}
if (sides.HasFlag(AnchorStyles.Left))
{
int startY = sides.HasFlag(AnchorStyles.Bottom) ? bmp.Height - waveDepth : bmp.Height;
int endY = sides.HasFlag(AnchorStyles.Top) ? waveDepth : 0;
for (int y = startY; y >= endY; y -= step)
{
points.Add(new Point(waveFunction(y, verticalWaveRange, waveDepth), y));
}
points.Add(new Point(waveFunction(endY, verticalWaveRange, waveDepth), endY));
}
else
{
points.Add(new Point(0, points[points.Count - 1].Y));
}
if (!sides.HasFlag(AnchorStyles.Top))
{
points[0] = new Point(points[points.Count - 1].X, 0);
}
Bitmap bmpResult = bmp.CreateEmptyBitmap();
using (bmp)
using (Graphics g = Graphics.FromImage(bmpResult))
using (TextureBrush brush = new TextureBrush(bmp))
{
g.SetHighQuality();
g.PixelOffsetMode = PixelOffsetMode.Half;
if (cutOutBackgroundColor.A > 0)
{
g.Clear(cutOutBackgroundColor);
}
g.FillPolygon(brush, points.ToArray());
}
return bmpResult;
}
public static Bitmap TornEdges(Bitmap bmp, int tornDepth, int tornRange, AnchorStyles sides, bool curvedEdges, bool random, Color cutOutBackgroundColor)
{
if (tornDepth < 1 || tornRange < 1 || sides == AnchorStyles.None)
{
return bmp;
}
List points = new List();
int horizontalTornCount = bmp.Width / tornRange;
int verticalTornCount = bmp.Height / tornRange;
if (horizontalTornCount < 2 && verticalTornCount < 2)
{
return bmp;
}
if (sides.HasFlag(AnchorStyles.Top) && horizontalTornCount > 1)
{
int startX = (sides.HasFlag(AnchorStyles.Left) && verticalTornCount > 1) ? tornDepth : 0;
int endX = (sides.HasFlag(AnchorStyles.Right) && verticalTornCount > 1) ? bmp.Width - tornDepth : bmp.Width;
for (int x = startX; x < endX; x += tornRange)
{
int y = random ? RandomFast.Next(0, tornDepth) : ((x / tornRange) & 1) * tornDepth;
points.Add(new Point(x, y));
}
}
else
{
points.Add(new Point(0, 0));
points.Add(new Point(bmp.Width, 0));
}
if (sides.HasFlag(AnchorStyles.Right) && verticalTornCount > 1)
{
int startY = (sides.HasFlag(AnchorStyles.Top) && horizontalTornCount > 1) ? tornDepth : 0;
int endY = (sides.HasFlag(AnchorStyles.Bottom) && horizontalTornCount > 1) ? bmp.Height - tornDepth : bmp.Height;
for (int y = startY; y < endY; y += tornRange)
{
int x = random ? RandomFast.Next(0, tornDepth) : ((y / tornRange) & 1) * tornDepth;
points.Add(new Point(bmp.Width - tornDepth + x, y));
}
}
else
{
points.Add(new Point(bmp.Width, 0));
points.Add(new Point(bmp.Width, bmp.Height));
}
if (sides.HasFlag(AnchorStyles.Bottom) && horizontalTornCount > 1)
{
int startX = (sides.HasFlag(AnchorStyles.Right) && verticalTornCount > 1) ? bmp.Width - tornDepth : bmp.Width;
int endX = (sides.HasFlag(AnchorStyles.Left) && verticalTornCount > 1) ? tornDepth : 0;
for (int x = startX; x >= endX; x = (x / tornRange - 1) * tornRange)
{
int y = random ? RandomFast.Next(0, tornDepth) : ((x / tornRange) & 1) * tornDepth;
points.Add(new Point(x, bmp.Height - tornDepth + y));
}
}
else
{
points.Add(new Point(bmp.Width, bmp.Height));
points.Add(new Point(0, bmp.Height));
}
if (sides.HasFlag(AnchorStyles.Left) && verticalTornCount > 1)
{
int startY = (sides.HasFlag(AnchorStyles.Bottom) && horizontalTornCount > 1) ? bmp.Height - tornDepth : bmp.Height;
int endY = (sides.HasFlag(AnchorStyles.Top) && horizontalTornCount > 1) ? tornDepth : 0;
for (int y = startY; y >= endY; y = (y / tornRange - 1) * tornRange)
{
int x = random ? RandomFast.Next(0, tornDepth) : ((y / tornRange) & 1) * tornDepth;
points.Add(new Point(x, y));
}
}
else
{
points.Add(new Point(0, bmp.Height));
points.Add(new Point(0, 0));
}
Bitmap bmpResult = bmp.CreateEmptyBitmap();
using (bmp)
using (Graphics g = Graphics.FromImage(bmpResult))
using (TextureBrush brush = new TextureBrush(bmp))
{
g.SetHighQuality();
g.PixelOffsetMode = PixelOffsetMode.Half;
if (cutOutBackgroundColor.A > 0)
{
g.Clear(cutOutBackgroundColor);
}
Point[] fillPoints = points.Distinct().ToArray();
if (curvedEdges)
{
g.FillClosedCurve(brush, fillPoints);
}
else
{
g.FillPolygon(brush, fillPoints);
}
}
return bmpResult;
}
public static Bitmap Slice(Bitmap bmp, int minSliceHeight, int maxSliceHeight, int minSliceShift, int maxSliceShift)
{
if (minSliceHeight < 1)
{
throw new ArgumentOutOfRangeException(nameof(minSliceHeight));
}
if (maxSliceHeight < 1)
{
throw new ArgumentOutOfRangeException(nameof(maxSliceHeight));
}
Bitmap bmpResult = bmp.CreateEmptyBitmap();
using (Graphics g = Graphics.FromImage(bmpResult))
{
int y = 0;
while (y < bmp.Height)
{
Rectangle sourceRect = new Rectangle(0, y, bmp.Width, RandomFast.Next(minSliceHeight, maxSliceHeight));
Rectangle destRect = sourceRect;
if (RandomFast.Next(1) == 0) // Shift left
{
destRect.X = RandomFast.Next(-maxSliceShift, -minSliceShift);
}
else // Shift right
{
destRect.X = RandomFast.Next(minSliceShift, maxSliceShift);
}
g.DrawImage(bmp, destRect, sourceRect, GraphicsUnit.Pixel);
y += sourceRect.Height;
}
}
return bmpResult;
}
public static string OpenImageFileDialog(Form form = null, string initialDirectory = null)
{
string[] images = OpenImageFileDialog(false, form, initialDirectory);
if (images != null && images.Length > 0)
{
return images[0];
}
return null;
}
public static string[] OpenImageFileDialog(bool multiselect, Form form = null, string initialDirectory = null)
{
using (OpenFileDialog ofd = new OpenFileDialog())
{
ofd.Filter = "Image files (*.png, *.jpg, *.jpeg, *.jpe, *.jfif, *.gif, *.bmp, *.tif, *.tiff)|*.png;*.jpg;*.jpeg;*.jpe;*.jfif;*.gif;*.bmp;*.tif;*.tiff|" +
"PNG (*.png)|*.png|JPEG (*.jpg, *.jpeg, *.jpe, *.jfif)|*.jpg;*.jpeg;*.jpe;*.jfif|GIF (*.gif)|*.gif|BMP (*.bmp)|*.bmp|TIFF (*.tif, *.tiff)|*.tif;*.tiff";
ofd.Multiselect = multiselect;
if (!string.IsNullOrEmpty(initialDirectory))
{
ofd.InitialDirectory = initialDirectory;
}
if (ofd.ShowDialog(form) == DialogResult.OK)
{
return ofd.FileNames;
}
}
return null;
}
public static ImageFormat GetImageFormat(string filePath)
{
ImageFormat imageFormat = ImageFormat.Png;
string ext = FileHelpers.GetFileNameExtension(filePath);
if (!string.IsNullOrEmpty(ext))
{
if (ext.Equals("png", StringComparison.OrdinalIgnoreCase))
{
imageFormat = ImageFormat.Png;
}
else if (ext.Equals("jpg", StringComparison.OrdinalIgnoreCase) || ext.Equals("jpeg", StringComparison.OrdinalIgnoreCase) ||
ext.Equals("jpe", StringComparison.OrdinalIgnoreCase) || ext.Equals("jfif", StringComparison.OrdinalIgnoreCase))
{
imageFormat = ImageFormat.Jpeg;
}
else if (ext.Equals("gif", StringComparison.OrdinalIgnoreCase))
{
imageFormat = ImageFormat.Gif;
}
else if (ext.Equals("bmp", StringComparison.OrdinalIgnoreCase))
{
imageFormat = ImageFormat.Bmp;
}
else if (ext.Equals("tif", StringComparison.OrdinalIgnoreCase) || ext.Equals("tiff", StringComparison.OrdinalIgnoreCase))
{
imageFormat = ImageFormat.Tiff;
}
}
return imageFormat;
}
public static bool SaveImage(Image img, string filePath)
{
FileHelpers.CreateDirectoryFromFilePath(filePath);
ImageFormat imageFormat = GetImageFormat(filePath);
try
{
img.Save(filePath, imageFormat);
return true;
}
catch (Exception e)
{
DebugHelper.WriteException(e);
e.ShowError();
}
return false;
}
public static string SaveImageFileDialog(Image img, string filePath = "", bool useLastDirectory = true)
{
using (SaveFileDialog sfd = new SaveFileDialog())
{
sfd.Filter = "PNG (*.png)|*.png|JPEG (*.jpg, *.jpeg, *.jpe, *.jfif)|*.jpg;*.jpeg;*.jpe;*.jfif|GIF (*.gif)|*.gif|BMP (*.bmp)|*.bmp|TIFF (*.tif, *.tiff)|*.tif;*.tiff";
sfd.DefaultExt = "png";
string initialDirectory = null;
if (useLastDirectory && !string.IsNullOrEmpty(HelpersOptions.LastSaveDirectory) && Directory.Exists(HelpersOptions.LastSaveDirectory))
{
initialDirectory = HelpersOptions.LastSaveDirectory;
}
if (!string.IsNullOrEmpty(filePath))
{
string folder = Path.GetDirectoryName(filePath);
if (string.IsNullOrEmpty(initialDirectory) && !string.IsNullOrEmpty(folder) && Directory.Exists(folder))
{
initialDirectory = folder;
}
sfd.FileName = Path.GetFileName(filePath);
string ext = FileHelpers.GetFileNameExtension(filePath);
if (!string.IsNullOrEmpty(ext))
{
ext = ext.ToLowerInvariant();
switch (ext)
{
case "png":
sfd.FilterIndex = 1;
break;
case "jpg":
case "jpeg":
case "jpe":
case "jfif":
sfd.FilterIndex = 2;
break;
case "gif":
sfd.FilterIndex = 3;
break;
case "bmp":
sfd.FilterIndex = 4;
break;
case "tif":
case "tiff":
sfd.FilterIndex = 5;
break;
}
}
}
sfd.InitialDirectory = initialDirectory;
if (sfd.ShowDialog() == DialogResult.OK && !string.IsNullOrEmpty(sfd.FileName))
{
SaveImage(img, sfd.FileName);
HelpersOptions.LastSaveDirectory = Path.GetDirectoryName(sfd.FileName);
return sfd.FileName;
}
}
return null;
}
public static Bitmap LoadImage(string filePath)
{
if (!string.IsNullOrEmpty(filePath))
{
try
{
filePath = FileHelpers.GetAbsolutePath(filePath);
if (!string.IsNullOrEmpty(filePath) && FileHelpers.IsImageFile(filePath) && File.Exists(filePath))
{
// http://stackoverflow.com/questions/788335/why-does-image-fromfile-keep-a-file-handle-open-sometimes
Bitmap bmp = (Bitmap)Image.FromStream(new MemoryStream(File.ReadAllBytes(filePath)));
if (HelpersOptions.RotateImageByExifOrientationData)
{
RotateImageByExifOrientationData(bmp);
}
return bmp;
}
}
catch (Exception e)
{
DebugHelper.WriteException(e);
}
}
return null;
}
public static Bitmap LoadImageWithFileDialog(Form form = null)
{
string filePath = OpenImageFileDialog(form);
if (!string.IsNullOrEmpty(filePath))
{
return LoadImage(filePath);
}
return null;
}
public static Bitmap CombineImages(List images, Orientation orientation, ImageCombinerAlignment alignment = ImageCombinerAlignment.LeftOrTop,
int space = 0, int wrapAfter = 0, bool autoFillBackground = false)
{
int imageCount = images.Count;
Rectangle[] imageRects = new Rectangle[imageCount];
Point position = new Point(0, 0);
int currentSize = 0;
for (int i = 0; i < imageCount; i++)
{
Bitmap image = images[i];
Point offset = new Point(0, 0);
if (orientation == Orientation.Horizontal)
{
if (wrapAfter > 0)
{
if (i % wrapAfter == 0)
{
if (i > 0)
{
position.X = 0;
position.Y += currentSize + space;
}
currentSize = images.Skip(i).Take(wrapAfter).Max(x => x.Height);
}
}
else if (i == 0)
{
currentSize = images.Max(x => x.Height);
}
switch (alignment)
{
default:
case ImageCombinerAlignment.LeftOrTop:
offset.Y = 0;
break;
case ImageCombinerAlignment.Center:
offset.Y = (currentSize / 2) - (image.Height / 2);
break;
case ImageCombinerAlignment.RightOrBottom:
offset.Y = currentSize - image.Height;
break;
}
imageRects[i] = new Rectangle(position.X + offset.X, position.Y + offset.Y, image.Width, image.Height);
position.X += image.Width + space;
}
else
{
if (wrapAfter > 0)
{
if (i % wrapAfter == 0)
{
if (i > 0)
{
position.X += currentSize + space;
position.Y = 0;
}
currentSize = images.Skip(i).Take(wrapAfter).Max(x => x.Width);
}
}
else if (i == 0)
{
currentSize = images.Max(x => x.Width);
}
switch (alignment)
{
default:
case ImageCombinerAlignment.LeftOrTop:
offset.X = 0;
break;
case ImageCombinerAlignment.Center:
offset.X = (currentSize / 2) - (image.Width / 2);
break;
case ImageCombinerAlignment.RightOrBottom:
offset.X = currentSize - image.Width;
break;
}
imageRects[i] = new Rectangle(position.X + offset.X, position.Y + offset.Y, image.Width, image.Height);
position.Y += image.Height + space;
}
}
Rectangle totalImageRect = imageRects.Combine();
Bitmap bmp = new Bitmap(totalImageRect.Width, totalImageRect.Height);
using (Graphics g = Graphics.FromImage(bmp))
{
g.SetHighQuality();
for (int i = 0; i < imageCount; i++)
{
Bitmap image = images[i];
if (autoFillBackground && i == 0)
{
Color backgroundColor = image.GetPixel(image.Width - 1, image.Height - 1);
g.Clear(backgroundColor);
}
g.DrawImage(image, imageRects[i]);
}
}
return bmp;
}
public static Bitmap CombineImages(IEnumerable imageFiles, Orientation orientation, ImageCombinerAlignment alignment = ImageCombinerAlignment.LeftOrTop,
int space = 0, int wrapAfter = 0, bool autoFillBackground = false)
{
List images = new List();
try
{
foreach (string filePath in imageFiles)
{
Bitmap bmp = LoadImage(filePath);
if (bmp != null)
{
images.Add(bmp);
}
}
if (images.Count > 1)
{
return CombineImages(images, orientation, alignment, space, wrapAfter, autoFillBackground);
}
}
finally
{
foreach (Bitmap bmp in images)
{
if (bmp != null)
{
bmp.Dispose();
}
}
}
return null;
}
public static List SplitImage(Image img, int rowCount, int columnCount)
{
List images = new List();
int width = img.Width / columnCount;
int height = img.Height / rowCount;
for (int y = 0; y < rowCount; y++)
{
for (int x = 0; x < columnCount; x++)
{
Bitmap bmp = new Bitmap(width, height);
using (Graphics g = Graphics.FromImage(bmp))
{
Rectangle destRect = new Rectangle(0, 0, width, height);
Rectangle srcRect = new Rectangle(x * width, y * height, width, height);
g.DrawImage(img, destRect, srcRect, GraphicsUnit.Pixel);
}
images.Add(bmp);
}
}
return images;
}
public static Bitmap CreateColorPickerIcon(Color color, Rectangle rect, int holeSize = 0)
{
Bitmap bmp = new Bitmap(rect.Width, rect.Height);
using (Graphics g = Graphics.FromImage(bmp))
{
DrawColorPickerIcon(g, color, rect, holeSize);
}
return bmp;
}
public static void DrawColorPickerIcon(Graphics g, Color color, Rectangle rect, int holeSize = 0)
{
if (color.IsTransparent())
{
using (Image checker = CreateCheckerPattern(rect.Width / 2, rect.Height / 2))
{
g.DrawImage(checker, rect);
}
}
using (SolidBrush brush = new SolidBrush(color))
{
g.FillRectangle(brush, rect);
}
g.DrawRectangleProper(Pens.Black, rect);
if (holeSize > 0)
{
g.CompositingMode = CompositingMode.SourceCopy;
Rectangle holeRect = new Rectangle((rect.Width / 2) - (holeSize / 2), (rect.Height / 2) - (holeSize / 2), holeSize, holeSize);
g.FillRectangle(Brushes.Transparent, holeRect);
g.DrawRectangleProper(Pens.Black, holeRect);
}
}
public static Rectangle FindAutoCropRectangle(Bitmap bmp, bool sameColorCrop = false,
AnchorStyles sides = AnchorStyles.Top | AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Right)
{
Rectangle source = new Rectangle(0, 0, bmp.Width, bmp.Height);
if (sides == AnchorStyles.None)
{
return source;
}
Rectangle crop = source;
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true, ImageLockMode.ReadOnly))
{
bool leave = false;
ColorBgra checkColor = unsafeBitmap.GetPixel(0, 0);
uint mask = checkColor.Alpha == 0 ? 0xFF000000 : 0xFFFFFFFF;
uint check = checkColor.Bgra & mask;
if (sides.HasFlag(AnchorStyles.Left))
{
// Find X (Left to right)
for (int x = 0; x < bmp.Width && !leave; x++)
{
for (int y = 0; y < bmp.Height; y++)
{
if ((unsafeBitmap.GetPixel(x, y).Bgra & mask) != check)
{
crop.X = x;
crop.Width -= x;
leave = true;
break;
}
}
}
// If all pixels same color
if (!leave)
{
return crop;
}
leave = false;
}
if (sides.HasFlag(AnchorStyles.Top))
{
// Find Y (Top to bottom)
for (int y = 0; y < bmp.Height && !leave; y++)
{
for (int x = 0; x < bmp.Width; x++)
{
if ((unsafeBitmap.GetPixel(x, y).Bgra & mask) != check)
{
crop.Y = y;
crop.Height -= y;
leave = true;
break;
}
}
}
leave = false;
}
if (!sameColorCrop)
{
checkColor = unsafeBitmap.GetPixel(bmp.Width - 1, bmp.Height - 1);
mask = checkColor.Alpha == 0 ? 0xFF000000 : 0xFFFFFFFF;
check = checkColor.Bgra & mask;
}
if (sides.HasFlag(AnchorStyles.Right))
{
// Find Width (Right to left)
for (int x = bmp.Width - 1; x >= 0 && !leave; x--)
{
for (int y = 0; y < bmp.Height; y++)
{
if ((unsafeBitmap.GetPixel(x, y).Bgra & mask) != check)
{
crop.Width = x - crop.X + 1;
leave = true;
break;
}
}
}
leave = false;
}
if (sides.HasFlag(AnchorStyles.Bottom))
{
// Find Height (Bottom to top)
for (int y = bmp.Height - 1; y >= 0 && !leave; y--)
{
for (int x = 0; x < bmp.Width; x++)
{
if ((unsafeBitmap.GetPixel(x, y).Bgra & mask) != check)
{
crop.Height = y - crop.Y + 1;
leave = true;
break;
}
}
}
}
}
return crop;
}
public static Bitmap AutoCropImage(Bitmap bmp, bool sameColorCrop = false,
AnchorStyles sides = AnchorStyles.Top | AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Right, int padding = 0)
{
Rectangle source = new Rectangle(0, 0, bmp.Width, bmp.Height);
Rectangle rect = FindAutoCropRectangle(bmp, sameColorCrop, sides);
if (source != rect)
{
Bitmap croppedBitmap = CropBitmap(bmp, rect);
if (croppedBitmap != null)
{
using (bmp)
{
if (padding > 0)
{
using (croppedBitmap)
{
Color color = bmp.GetPixel(0, 0);
return AddCanvas(croppedBitmap, padding, color);
}
}
return croppedBitmap;
}
}
}
return bmp;
}
public static RotateFlipType RotateImageByExifOrientationData(Bitmap bmp, bool removeExifOrientationData = true)
{
int orientationId = 0x0112;
RotateFlipType rotateType = RotateFlipType.RotateNoneFlipNone;
if (bmp.PropertyIdList.Contains(orientationId))
{
PropertyItem propertyItem = bmp.GetPropertyItem(orientationId);
rotateType = GetRotateFlipTypeByExifOrientationData(propertyItem.Value[0]);
if (rotateType != RotateFlipType.RotateNoneFlipNone)
{
bmp.RotateFlip(rotateType);
if (removeExifOrientationData)
{
bmp.RemovePropertyItem(orientationId);
}
}
}
return rotateType;
}
private static RotateFlipType GetRotateFlipTypeByExifOrientationData(int orientation)
{
switch (orientation)
{
default:
case 1:
return RotateFlipType.RotateNoneFlipNone;
case 2:
return RotateFlipType.RotateNoneFlipX;
case 3:
return RotateFlipType.Rotate180FlipNone;
case 4:
return RotateFlipType.Rotate180FlipX;
case 5:
return RotateFlipType.Rotate90FlipX;
case 6:
return RotateFlipType.Rotate90FlipNone;
case 7:
return RotateFlipType.Rotate270FlipX;
case 8:
return RotateFlipType.Rotate270FlipNone;
}
}
public static void SelectiveColor(Bitmap bmp, Color lightColor, Color darkColor, int paletteSize = 2)
{
paletteSize = Math.Max(paletteSize, 2);
Dictionary colors = new Dictionary();
for (int i = 0; i < paletteSize; i++)
{
Color color = ColorHelpers.Lerp(lightColor, darkColor, (float)i / (paletteSize - 1));
int perceivedBrightness = ColorHelpers.PerceivedBrightness(color);
if (!colors.ContainsKey(perceivedBrightness))
{
colors.Add(perceivedBrightness, color);
}
}
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true))
{
for (int i = 0; i < unsafeBitmap.PixelCount; i++)
{
ColorBgra color = unsafeBitmap.GetPixel(i);
int perceivedBrightness = ColorHelpers.PerceivedBrightness(color.ToColor());
KeyValuePair closest =
colors.Aggregate((current, next) => Math.Abs(current.Key - perceivedBrightness) < Math.Abs(next.Key - perceivedBrightness) ? current : next);
Color newColor = closest.Value;
color.Red = newColor.R;
color.Green = newColor.G;
color.Blue = newColor.B;
unsafeBitmap.SetPixel(i, color);
}
}
}
public static void ReplaceColor(Bitmap bmp, Color sourceColor, Color targetColor, bool autoSourceColor = false, int threshold = 0)
{
ColorBgra sourceBgra = new ColorBgra(sourceColor);
ColorBgra targetBgra = new ColorBgra(targetColor);
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true))
{
if (autoSourceColor)
{
sourceBgra = unsafeBitmap.GetPixel(0);
sourceColor = sourceBgra.ToColor();
}
for (int i = 0; i < unsafeBitmap.PixelCount; i++)
{
ColorBgra color = unsafeBitmap.GetPixel(i);
if (threshold == 0)
{
if (color == sourceBgra)
{
unsafeBitmap.SetPixel(i, targetBgra);
}
}
else if (ColorHelpers.ColorsAreClose(color.ToColor(), sourceColor, threshold))
{
unsafeBitmap.SetPixel(i, targetBgra);
}
}
}
}
public static Size GetImageFileDimensions(string filePath)
{
using (Bitmap bmp = LoadImage(filePath))
{
if (bmp != null)
{
return bmp.Size;
}
}
return Size.Empty;
}
public static InterpolationMode GetInterpolationMode(ImageInterpolationMode interpolationMode)
{
switch (interpolationMode)
{
default:
case ImageInterpolationMode.HighQualityBicubic:
return InterpolationMode.HighQualityBicubic;
case ImageInterpolationMode.Bicubic:
return InterpolationMode.Bicubic;
case ImageInterpolationMode.HighQualityBilinear:
return InterpolationMode.HighQualityBilinear;
case ImageInterpolationMode.Bilinear:
return InterpolationMode.Bilinear;
case ImageInterpolationMode.NearestNeighbor:
return InterpolationMode.NearestNeighbor;
}
}
public static Size ApplyAspectRatio(int width, int height, Bitmap bmp)
{
int newWidth, newHeight;
if (width == 0)
{
newWidth = (int)Math.Round((float)height / bmp.Height * bmp.Width);
newHeight = height;
}
else if (height == 0)
{
newWidth = width;
newHeight = (int)Math.Round((float)width / bmp.Width * bmp.Height);
}
else
{
newWidth = width;
newHeight = height;
}
return new Size(newWidth, newHeight);
}
public static Size ApplyAspectRatio(Size size, Bitmap bmp)
{
return ApplyAspectRatio(size.Width, size.Height, bmp);
}
public static Bitmap NonIndexedBitmap(Bitmap bmp)
{
if (bmp != null && bmp.PixelFormat.HasFlag(PixelFormat.Indexed))
{
using (bmp)
{
return bmp.Clone(new Rectangle(0, 0, bmp.Width, bmp.Height), PixelFormat.Format32bppArgb);
}
}
return bmp;
}
public static Bitmap DrawGrip(Color color, Color shadow)
{
int size = 16;
Bitmap bmp = new Bitmap(size, size);
using (Graphics g = Graphics.FromImage(bmp))
using (SolidBrush brush = new SolidBrush(color))
using (SolidBrush shadowBrush = new SolidBrush(shadow))
{
int x = size / 2;
int boxSize = 2;
for (int i = 0; i < 4; i++)
{
g.FillRectangle(shadowBrush, x - boxSize, (i * 4) + 2, boxSize, boxSize);
g.FillRectangle(brush, x - boxSize - 1, (i * 4) + 1, boxSize, boxSize);
g.FillRectangle(shadowBrush, x + 2, (i * 4) + 2, boxSize, boxSize);
g.FillRectangle(brush, x + 1, (i * 4) + 1, boxSize, boxSize);
}
}
return bmp;
}
public static MemoryStream SavePNG(Image img, PNGBitDepth bitDepth)
{
MemoryStream ms = new MemoryStream();
SavePNG(img, ms, bitDepth);
return ms;
}
public static void SavePNG(Image img, Stream stream, PNGBitDepth bitDepth)
{
if (bitDepth == PNGBitDepth.Automatic)
{
if (IsImageTransparent((Bitmap)img))
{
bitDepth = PNGBitDepth.Bit32;
}
else
{
bitDepth = PNGBitDepth.Bit24;
}
}
if (bitDepth == PNGBitDepth.Bit32)
{
if (img.PixelFormat != PixelFormat.Format32bppArgb && img.PixelFormat != PixelFormat.Format32bppRgb)
{
using (Bitmap bmpNew = ((Bitmap)img).Clone(new Rectangle(0, 0, img.Width, img.Height), PixelFormat.Format32bppArgb))
{
bmpNew.Save(stream, ImageFormat.Png);
return;
}
}
}
else if (bitDepth == PNGBitDepth.Bit24)
{
if (img.PixelFormat != PixelFormat.Format24bppRgb)
{
using (Bitmap bmpNew = ((Bitmap)img).Clone(new Rectangle(0, 0, img.Width, img.Height), PixelFormat.Format24bppRgb))
{
bmpNew.Save(stream, ImageFormat.Png);
return;
}
}
}
img.Save(stream, ImageFormat.Png);
}
public static MemoryStream PNGStripChunks(MemoryStream stream, params string[] chunks)
{
MemoryStream output = new MemoryStream();
stream.Seek(0, SeekOrigin.Begin);
byte[] signature = new byte[8];
stream.Read(signature, 0, 8);
output.Write(signature, 0, 8);
while (true)
{
byte[] lenBytes = new byte[4];
if (stream.Read(lenBytes, 0, 4) != 4)
{
break;
}
if (BitConverter.IsLittleEndian)
{
Array.Reverse(lenBytes);
}
int len = BitConverter.ToInt32(lenBytes, 0);
if (BitConverter.IsLittleEndian)
{
Array.Reverse(lenBytes);
}
byte[] type = new byte[4];
stream.Read(type, 0, 4);
byte[] data = new byte[len + 4];
stream.Read(data, 0, data.Length);
string strType = Encoding.ASCII.GetString(type);
if (!chunks.Contains(strType))
{
output.Write(lenBytes, 0, lenBytes.Length);
output.Write(type, 0, type.Length);
output.Write(data, 0, data.Length);
}
}
return output;
}
public static MemoryStream PNGStripColorSpaceInformation(MemoryStream stream)
{
// http://www.libpng.org/pub/png/spec/1.2/PNG-Chunks.html
// 4.2.2.1. gAMA Image gamma
// 4.2.2.2. cHRM Primary chromaticities
// 4.2.2.3. sRGB Standard RGB color space
// 4.2.2.4. iCCP Embedded ICC profile
return PNGStripChunks(stream, "gAMA", "cHRM", "sRGB", "iCCP");
}
public static MemoryStream SaveJPEG(Image img, int quality)
{
MemoryStream ms = new MemoryStream();
SaveJPEG(img, ms, quality);
return ms;
}
public static void SaveJPEG(Image img, string filePath, int quality)
{
using (FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.Read))
{
SaveJPEG(img, fs, quality);
}
}
public static void SaveJPEG(Image img, Stream stream, int quality)
{
quality = quality.Clamp(0, 100);
using (EncoderParameters encoderParameters = new EncoderParameters(1))
{
encoderParameters.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);
img.Save(stream, ImageFormat.Jpeg.GetCodecInfo(), encoderParameters);
}
}
public static MemoryStream SaveJPEGAutoQuality(Image img, int sizeLimit, int qualityDecrement = 5, int minQuality = 0, int maxQuality = 100)
{
qualityDecrement = qualityDecrement.Clamp(1, 100);
minQuality = minQuality.Clamp(0, 100);
maxQuality = maxQuality.Clamp(0, 100);
if (minQuality >= maxQuality)
{
return SaveJPEG(img, minQuality);
}
MemoryStream ms = null;
for (int quality = maxQuality; quality >= minQuality; quality -= qualityDecrement)
{
if (ms != null)
{
ms.Dispose();
}
ms = SaveJPEG(img, quality);
//DebugHelper.WriteLine($"Quality: {quality}% - Size: {ms.Length.ToSizeString()}");
if (ms.Length <= sizeLimit)
{
break;
}
}
return ms;
}
public static MemoryStream SaveGIF(Image img, GIFQuality quality)
{
MemoryStream ms = new MemoryStream();
SaveGIF(img, ms, quality);
return ms;
}
public static void SaveGIF(Image img, Stream stream, GIFQuality quality)
{
if (quality == GIFQuality.Default)
{
img.Save(stream, ImageFormat.Gif);
}
else
{
Quantizer quantizer;
switch (quality)
{
case GIFQuality.Grayscale:
quantizer = new GrayscaleQuantizer();
break;
case GIFQuality.Bit4:
quantizer = new OctreeQuantizer(15, 4);
break;
default:
case GIFQuality.Bit8:
quantizer = new OctreeQuantizer(255, 4);
break;
}
using (Bitmap quantized = quantizer.Quantize(img))
{
quantized.Save(stream, ImageFormat.Gif);
}
}
}
}
}