/// <summary>
/// Applies quantization to the image.
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="source">The image this method extends.</param>
/// <param name="quantizer">The quantizer to apply to perform the operation.</param>
/// <param name="maxColors">The maximum number of colors to return.</param>
/// <returns>The <see cref="Image{TPixel}"/>.</returns>
public static IImageProcessingContext <TPixel> Quantize <TPixel>(this IImageProcessingContext <TPixel> source, IQuantizer <TPixel> quantizer, int maxColors)
where TPixel : struct, IPixel <TPixel>
{
return(source.Apply(img =>
{
// TODO : move helper logic into the processor
QuantizedImage <TPixel> quantized = quantizer.Quantize(img.Frames.RootFrame, maxColors);
int palleteCount = quantized.Palette.Length - 1;
using (Buffer2D <TPixel> pixels = source.MemoryManager.Allocate2D <TPixel>(quantized.Width, quantized.Height))
{
Parallel.For(
0,
pixels.Height,
img.GetConfiguration().ParallelOptions,
y =>
{
Span <TPixel> row = pixels.GetRowSpan(y);
int yy = y * pixels.Width;
for (int x = 0; x < pixels.Width; x++)
{
int i = x + yy;
TPixel color = quantized.Palette[Math.Min(palleteCount, quantized.Pixels[i])];
row[x] = color;
}
});
Buffer2D <TPixel> .SwapContents(img.Frames[0].PixelBuffer, pixels);
}
}));
}
public static IImageProcessingContext <TPixel> ApplyScalingWaterMarkWordWrap <TPixel>(this IImageProcessingContext <TPixel> processingContext, Font font, string text, TPixel color, float padding)
where TPixel : struct, IPixel <TPixel>
{
return(processingContext.Apply(img => {
float targetWidth = img.Width - (padding * 2);
float targetHeight = img.Height - (padding * 2);
float targetMinHeight = img.Height - (padding * 3);
var scaledFont = font;
SizeF s = new SizeF(float.MaxValue, float.MaxValue);
float scaleFactor = (scaledFont.Size / 2);
int trapCount = (int)scaledFont.Size * 2;
if (trapCount < 10)
{
trapCount = 10;
}
bool isTooSmall = false;
while ((s.Height > targetHeight || s.Height < targetMinHeight) && trapCount > 0)
{
if (s.Height > targetHeight)
{
if (isTooSmall)
{
scaleFactor = scaleFactor / 2;
}
scaledFont = new Font(scaledFont, scaledFont.Size - scaleFactor);
isTooSmall = false;
}
if (s.Height < targetMinHeight)
{
if (!isTooSmall)
{
scaleFactor = scaleFactor / 2;
}
scaledFont = new Font(scaledFont, scaledFont.Size + scaleFactor);
isTooSmall = true;
}
trapCount--;
s = TextMeasurer.Measure(text, new RendererOptions(scaledFont)
{
WrappingWidth = targetWidth
});
}
var center = new PointF(padding, img.Height / 2);
img.Mutate(i => i.DrawText(text, scaledFont, color, center, new TextGraphicsOptions(true)
{
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center,
WrapTextWidth = targetWidth
}));
}));
}
/// <summary>
/// Resizes an image to the given width and height with the given sampler and
/// source rectangle.
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="source">The image to resize.</param>
/// <param name="width">The target image width.</param>
/// <param name="height">The target image height.</param>
/// <param name="sampler">The <see cref="IResampler"/> to perform the resampling.</param>
/// <param name="targetRectangle">
/// The <see cref="Rectangle"/> structure that specifies the portion of the target image object to draw to.
/// </param>
/// <param name="compand">Whether to compress and expand the image color-space to gamma correct the image during processing.</param>
/// <returns>The <see cref="Image{TPixel}"/></returns>
/// <remarks>Passing zero for one of height or width will automatically preserve the aspect ratio of the original image</remarks>
public static IImageProcessingContext <TPixel> Resize <TPixel>(this IImageProcessingContext <TPixel> source, int width, int height, IResampler sampler, Rectangle targetRectangle, bool compand)
where TPixel : struct, IPixel <TPixel>
{
return(source.Apply(img =>
{
// TODO : stop cheating here and move this stuff into the processors itself
if (width == 0 && height > 0)
{
width = (int)MathF.Round(img.Width * height / (float)img.Height);
targetRectangle.Width = width;
}
if (height == 0 && width > 0)
{
height = (int)MathF.Round(img.Height * width / (float)img.Width);
targetRectangle.Height = height;
}
Guard.MustBeGreaterThan(width, 0, nameof(width));
Guard.MustBeGreaterThan(height, 0, nameof(height));
img.Mutate(x => x.ApplyProcessor(new ResizeProcessor <TPixel>(sampler, width, height, targetRectangle)
{
Compand = compand
}));
}));
}
public static IImageProcessingContext <TPixel> EnsureMaximumSize <TPixel>(this IImageProcessingContext <TPixel> source, int maxWidth, int maxHeight,
bool maintainAspectRatio = true) where TPixel : struct, IPixel <TPixel>
{
return(source.Apply(image =>
{
if ((image.Width > maxWidth) || (image.Height > maxHeight))
{
if (maintainAspectRatio)
{
// Handle if width is larger.
if (image.Width > image.Height)
{
image.Mutate(x => x.Resize(maxWidth, Convert.ToInt32(image.Height * maxWidth / image.Width)));
}
// Else height is larger.
else
{
image.Mutate(x => x.Resize(Convert.ToInt32(image.Width * maxHeight / image.Height), maxHeight));
}
}
else
{
image.Mutate(x => x.Resize(maxWidth, maxHeight));
}
}
}));
}
/// <summary>
/// Applies quantization to the image.
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="source">The image this method extends.</param>
/// <param name="quantizer">The quantizer to apply to perform the operation.</param>
/// <param name="maxColors">The maximum number of colors to return.</param>
/// <returns>The <see cref="Image{TPixel}"/>.</returns>
public static IImageProcessingContext <TPixel> Quantize <TPixel>(this IImageProcessingContext <TPixel> source, IQuantizer <TPixel> quantizer, int maxColors)
where TPixel : struct, IPixel <TPixel>
{
return(source.Apply(img =>
{
// TODO : move helper logic into the processor
QuantizedImage <TPixel> quantized = quantizer.Quantize(img.Frames.RootFrame, maxColors);
int palleteCount = quantized.Palette.Length - 1;
using (var pixels = new PixelAccessor <TPixel>(quantized.Width, quantized.Height))
{
Parallel.For(
0,
pixels.Height,
img.GetConfiguration().ParallelOptions,
y =>
{
for (int x = 0; x < pixels.Width; x++)
{
int i = x + (y * pixels.Width);
TPixel color = quantized.Palette[Math.Min(palleteCount, quantized.Pixels[i])];
pixels[x, y] = color;
}
});
img.Frames[0].SwapPixelsBuffers(pixels);
}
}));
}
public static IImageProcessingContext <TPixel> ApplyScalingLogoWaterMark <TPixel>(
this IImageProcessingContext <TPixel> processingContext,
byte[] watermark)
where TPixel : struct, IPixel <TPixel>
{
return(processingContext.Apply(
image =>
{
// Dispose of logo once used.
using (var logo = Image.Load <TPixel>(watermark))
{
bool worh = image.Width > image.Height;
double coff = worh
? image.Width * 0.127 / Math.Min(logo.Width, logo.Height)
: image.Height * 0.127 / Math.Max(logo.Width, logo.Height);
var size = new Size((int)(logo.Width * coff), (int)(logo.Height * coff));
var location = new Point(image.Width - size.Width - 57, image.Height - size.Height - 271);
// Resize the logo
logo.Mutate(i => i.Resize(size));
image.Mutate(i => i.DrawImage(logo, location, PixelColorBlendingMode.Normal, PixelAlphaCompositionMode.SrcOver, 1f));
}
}));
}
/// <summary>
/// 画圆圈（泡泡）
/// </summary>
/// <typeparam name="TPixel"></typeparam>
/// <param name="processingContext"></param>
/// <param name="containerWidth"></param>
/// <param name="containerHeight"></param>
/// <param name="count"></param>
/// <param name="miniR"></param>
/// <param name="maxR"></param>
/// <param name="color"></param>
/// <param name="canOverlap"></param>
/// <returns></returns>
public static IImageProcessingContext <TPixel> DrawingCircles <TPixel>(this IImageProcessingContext <TPixel> processingContext, int containerWidth, int containerHeight, int count, int miniR, int maxR, TPixel color, bool canOverlap = false)
where TPixel : struct, IPixel <TPixel>
{
return(processingContext.Apply(img =>
{
EllipsePolygon ep = null;
Random random = new Random();
PointF tempPoint = new PointF();
List <PointF> points = new List <PointF>();
if (count > 0)
{
for (int i = 0; i < count; i++)
{
if (canOverlap)
{
tempPoint = new PointF(random.Next(0, containerWidth), random.Next(0, containerHeight));
}
else
{
tempPoint = getCirclePoginF(containerWidth, containerHeight, (miniR + maxR), ref points);
}
ep = new EllipsePolygon(tempPoint, random.Next(miniR, maxR));
img.Mutate(ctx => ctx
.Draw(color, (float)(random.Next(94, 145) / 100.0), ep.Clip())
);
}
}
}));
}
public static IImageProcessingContext <TPixel> SetAlphaMask <TPixel>(this IImageProcessingContext <TPixel> source, Image <Alpha8> mask, PixelAlphaCompositionMode mode) where TPixel : struct, IPixel <TPixel>
{
if (mask == null)
{
return(source);
}
return(source.Apply
(
img =>
{
if (mask.Width == img.Width && mask.Height == img.Height)
{
using (var rmask = mask.CloneAs <TPixel>())
{
img.Mutate(dc => dc.DrawImage(rmask, PixelColorBlendingMode.Normal, mode, 1));
}
}
else
{
using (var rmask = mask.CloneAs <TPixel>())
{
rmask.Mutate(dc => dc.Resize(img.Width, img.Height));
img.Mutate(dc => dc.DrawImage(rmask, PixelColorBlendingMode.Normal, mode, 1));
}
}
}
));
}
/// <summary>
/// 绘制中文字符（可以绘制字母数字，但样式可能需要改）
/// </summary>
/// <typeparam name="TPixel"></typeparam>
/// <param name="processingContext"></param>
/// <param name="containerWidth"></param>
/// <param name="containerHeight"></param>
/// <param name="text"></param>
/// <param name="color"></param>
/// <param name="font"></param>
/// <returns></returns>
public static IImageProcessingContext <TPixel> DrawingCnText <TPixel>(this IImageProcessingContext <TPixel> processingContext, int containerWidth, int containerHeight, string text, Rgba32 color, Font font)
where TPixel : struct, IPixel <TPixel>
{
return(processingContext.Apply(img =>
{
if (string.IsNullOrEmpty(text) == false)
{
Random random = new Random();
var textWidth = (img.Width / text.Length);
var img2Size = Math.Min(textWidth, img.Height);
var fontMiniSize = (int)(img2Size * 0.6);
var fontMaxSize = (int)(img2Size * 0.95);
for (int i = 0; i < text.Length; i++)
{
using (Image <Rgba32> img2 = new Image <Rgba32>(img2Size, img2Size))
{
Font scaledFont = new Font(font, random.Next(fontMiniSize, fontMaxSize));
var point = new Point(i * textWidth, (containerHeight - img2.Height) / 2);
var textGraphicsOptions = new TextGraphicsOptions(true)
{
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top
};
img2.Mutate(ctx => ctx
.DrawText(textGraphicsOptions, text[i].ToString(), scaledFont, color, new Point(0, 0))
.Rotate(random.Next(-45, 45))
);
img.Mutate(ctx => ctx.DrawImage(img2, point, 1));
}
}
}
}));
}
public static IImageProcessingContext <TPixel> ApplyScalingWaterMarkSimple <TPixel>(this IImageProcessingContext <TPixel> processingContext, Font font, string text, TPixel color, float padding)
where TPixel : struct, IPixel <TPixel>
{
return(processingContext.Apply(img =>
{
float targetWidth = img.Width - (padding * 2);
float targetHeight = img.Height - (padding * 2);
// measure the text size
SizeF size = TextMeasurer.Measure(text, new RendererOptions(font));
//find out how much we need to scale the text to fill the space (up or down)
float scalingFactor = Math.Min(img.Width / size.Width, img.Height / size.Height);
//create a new font
Font scaledFont = new Font(font, scalingFactor * font.Size);
var center = new PointF(img.Width / 2, img.Height / 2);
var textGraphicOptions = new TextGraphicsOptions(true)
{
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center
};
img.Mutate(i => i.DrawText(textGraphicOptions, text, scaledFont, color, center));
}));
}
public static IImageProcessingContext <Rgba32> CreateLayerFromBoundingBox(this IImageProcessingContext <Rgba32> context, BaseBoundingBox boundingBox, string param)
{
return(context.Apply(img =>
{
using (var layer = new Image <Rgba32>(img.Width, img.Height))
{
boundingBox.SetInput(param);
layer.Mutate(i => boundingBox.Apply(i));
img.Mutate(i => i.DrawImage(layer, 1.0f, new Point(0, 0)));
}
}));
}
// From https://github.com/SixLabors/Samples/blob/master/ImageSharp/DrawWaterMarkOnImage/Program.cs
public static IImageProcessingContext <TPixel> ApplyScalingWaterMarkSimple <TPixel>(this IImageProcessingContext <TPixel> processingContext, Font font, TPixel color, float padding, int scalingFactor, string text)
where TPixel : struct, IPixel <TPixel>
{
return(processingContext.Apply(img =>
{
SizeF size = TextMeasurer.Measure(text, new RendererOptions(font));
Font scaledFont = new Font(font, Math.Min(img.Width, img.Height) / scalingFactor * font.Size);
var pos = new PointF(img.Width - padding, img.Height - padding);
img.Mutate(i => i.DrawText(text, scaledFont, color, pos, new TextGraphicsOptions(true)
{
HorizontalAlignment = HorizontalAlignment.Right,
VerticalAlignment = VerticalAlignment.Bottom
}));
}));
}
/// <summary>
/// 画杂线
/// </summary>
/// <typeparam name="TPixel"></typeparam>
/// <param name="processingContext"></param>
/// <param name="containerWidth"></param>
/// <param name="containerHeight"></param>
/// <param name="color"></param>
/// <param name="count"></param>
/// <param name="thickness"></param>
/// <returns></returns>
public static IImageProcessingContext <TPixel> DrawingGrid <TPixel>(this IImageProcessingContext <TPixel> processingContext, int containerWidth, int containerHeight, TPixel color, int count, float thickness)
where TPixel : struct, IPixel <TPixel>
{
return(processingContext.Apply(img =>
{
var points = new List <PointF> {
new PointF(0, 0)
};
for (int i = 0; i < count; i++)
{
getCirclePoginF(containerWidth, containerHeight, 9, ref points);
}
points.Add(new PointF(containerWidth, containerHeight));
img.Mutate(ctx => ctx
.DrawLines(color, thickness, points.ToArray())
);
}));
}
public static IImageProcessingContext <TPixel> DrawingEnText <TPixel>(this IImageProcessingContext <TPixel> processingContext, int containerWidth, int containerHeight, string text, string[] colorHexArr, Font[] fonts, int gridCoefficient = 6)
where TPixel : struct, IPixel <TPixel>
{
if (gridCoefficient < 0)
{
gridCoefficient = 0;
}
return(processingContext.Apply(img =>
{
if (string.IsNullOrEmpty(text) == false)
{
Random random = new Random();
var textWidth = (img.Width / text.Length);
var img2Size = Math.Min(textWidth, img.Height);
var fontMiniSize = (int)(img2Size * 0.9);
var fontMaxSize = (int)(img2Size * 1.37);
Array fontStyleArr = Enum.GetValues(typeof(FontStyle));
for (int i = 0; i < text.Length; i++)
{
using (Image <Rgba32> img2 = new Image <Rgba32>(img2Size, img2Size))
{
Font scaledFont = new Font(fonts[random.Next(0, fonts.Length)], random.Next(fontMiniSize, fontMaxSize), (FontStyle)fontStyleArr.GetValue(random.Next(fontStyleArr.Length)));
var point = new Point(i * textWidth, (containerHeight - img2.Height) / 2);
var colorHex = colorHexArr[random.Next(0, colorHexArr.Length)];
var textGraphicsOptions = new TextGraphicsOptions(true)
{
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top
};
img2.Mutate(ctx => ctx
.DrawText(textGraphicsOptions, text[i].ToString(), scaledFont, Rgba32.FromHex(colorHex), new Point(0, 0))
.DrawingGrid(containerWidth, containerHeight, Rgba32.FromHex(colorHex), gridCoefficient, 1)
.Rotate(random.Next(-45, 45))
);
img.Mutate(ctx => ctx.DrawImage(img2, point, 1));
}
}
}
}));
}
public static IImageProcessingContext <TPixel> ApplyFaceInfo <TPixel>(this IImageProcessingContext <TPixel> processingContext, IList <FaceDetails> faces, TPixel color, TPixel textColor)
where TPixel : struct, IPixel <TPixel>
{
return(processingContext.Apply(img =>
{
var gfxOptions = new GraphicsOptions(true)
{
};
var gfxTextOptions = new TextGraphicsOptions(true)
{
HorizontalAlignment = HorizontalAlignment.Center, VerticalAlignment = VerticalAlignment.Center
};
var font = SystemFonts.CreateFont("Arial", 39, FontStyle.Bold);
foreach (var face in faces)
{
PointF left_top = new PointF((float)face.BoundingBox.X, (float)face.BoundingBox.Y);
PointF left_bottom = new PointF((float)face.BoundingBox.X, (float)face.BoundingBox.Y + (float)face.BoundingBox.Height);
PointF right_top = new PointF((float)face.BoundingBox.X + (float)face.BoundingBox.Width, (float)face.BoundingBox.Y);
PointF right_bottom = new PointF((float)face.BoundingBox.X + (float)face.BoundingBox.Width, (float)face.BoundingBox.Y + (float)face.BoundingBox.Height);
PointF[] boundingBox = new PointF[] { left_top, right_top, right_bottom, left_bottom };
img.Mutate(i => i.DrawPolygon(color, 5f, boundingBox, gfxOptions));
PointF text_Age_pos = new PointF((float)face.BoundingBox.X + (float)face.BoundingBox.Width / 2, (float)face.BoundingBox.Y - 45f);
SizeF size = TextMeasurer.Measure($"{face.Age}", new RendererOptions(font)
{
HorizontalAlignment = HorizontalAlignment.Center, VerticalAlignment = VerticalAlignment.Center, Origin = text_Age_pos
});
PointF[] text_Background_Age = new PointF[] { new PointF(text_Age_pos.X - size.Width / 2 - 20f, text_Age_pos.Y - 20f), new PointF(text_Age_pos.X + size.Width / 2 + 20f, text_Age_pos.Y - 20f), new PointF(text_Age_pos.X + size.Width / 2 + 20f, text_Age_pos.Y + size.Height - 10f), new PointF(text_Age_pos.X - size.Width / 2 - 20f, text_Age_pos.Y + size.Height - 10f) };
img.Mutate(i => i.FillPolygon(color, text_Background_Age, gfxOptions));
img.Mutate(i => i.DrawText($"{face.Age}", font, textColor, text_Age_pos, gfxTextOptions));
PointF text_Emotion_pos = new PointF((float)face.BoundingBox.X + (float)face.BoundingBox.Width / 2, (float)face.BoundingBox.Y + (float)face.BoundingBox.Height + 45f);
size = TextMeasurer.Measure($"{face.Emotion}", new RendererOptions(font));
PointF[] text_Background_Emotion = new PointF[] { new PointF(text_Emotion_pos.X - size.Width / 2 - 20f, text_Emotion_pos.Y - 20f), new PointF(text_Emotion_pos.X + size.Width / 2 + 20f, text_Emotion_pos.Y - 20f), new PointF(text_Emotion_pos.X + size.Width / 2 + 20f, text_Emotion_pos.Y + size.Height - 10f), new PointF(text_Emotion_pos.X - size.Width / 2 - 20f, text_Emotion_pos.Y + size.Height - 10f) };
img.Mutate(i => i.FillPolygon(color, text_Background_Emotion, gfxOptions));
img.Mutate(i => i.DrawText($"{face.Emotion}", font, textColor, text_Emotion_pos, gfxTextOptions));
}
}));
}
/*
* public static IImageProcessingContext<TPixel> ApplyScalingWaterMarkSimple<TPixel>(this IImageProcessingContext<TPixel> processingContext, Font font, string text, TPixel color, float padding)
* where TPixel : struct, IPixel<TPixel>
* {
* return processingContext.Apply(img =>
* {
* float targetWidth = img.Width - (padding * 2);
* float targetHeight = img.Height - (padding * 2);
*
* // measure the text size
* SizeF size = TextMeasurer.Measure(text, new RendererOptions(font));
*
* //find out how much we need to scale the text to fill the space (up or down)
* float scalingFactor = Math.Min(img.Width / size.Width, img.Height / size.Height);
*
* //create a new font
* Font scaledFont = new Font(font, scalingFactor * font.Size);
*
* var center = new PointF(img.Width / 2, img.Height / 2);
* var textGraphicOptions = new TextGraphicsOptions(true)
* {
* HorizontalAlignment = HorizontalAlignment.Center,
* VerticalAlignment = VerticalAlignment.Center
* };
* img.Mutate(i => i.DrawText(textGraphicOptions, text, scaledFont, color, center));
* });
* }
*/
private static void ApplyScalingWaterMarkSimpleTopLeft <TPixel>(
this IImageProcessingContext <TPixel> p_processingContext, Font p_font, string p_text, TPixel p_fontColor,
TPixel p_backgroundColor, float p_targetSize)
where TPixel : struct, IPixel <TPixel>
{
p_processingContext.Apply(p_img =>
{
var targetSizePercent = 100 / p_targetSize;
// measure the text size
var size = TextMeasurer.Measure(p_text, new RendererOptions(p_font));
//find out how much we need to scale the text to fill the space (up or down)
var scalingFactor = Math.Min(p_img.Width / targetSizePercent / size.Width,
p_img.Height / targetSizePercent / size.Height);
//create a new font
var scaledFont = new Font(p_font, scalingFactor * p_font.Size);
size = TextMeasurer.Measure(p_text, new RendererOptions(scaledFont));
var center = new PointF(p_img.Width / 75.0f + size.Width / 2,
p_img.Height / 75.0f + size.Height / 2);
var textGraphicOptions = new TextGraphicsOptions(true)
{
HorizontalAlignment = HorizontalAlignment.Center,
VerticalAlignment = VerticalAlignment.Center
};
p_img.Mutate(p_i =>
p_i.FillPolygon(new GraphicsOptions(true, PixelColorBlendingMode.Multiply, 0.5f),
p_backgroundColor, new PointF(0, 0), new PointF(0, size.Height * 2), new
PointF(size.Width + p_img.Width / 75 * 2,
size.Height * 2), new
PointF(size.Width + p_img.Width / 75 * 2,
0)));
p_img.Mutate(p_i => p_i.DrawText(textGraphicOptions, p_text, scaledFont, p_fontColor,
center));
});
}
/// <summary>
/// Resizes an image in accordance with the given <see cref="ResizeOptions"/>.
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="source">The image to resize.</param>
/// <param name="options">The resize options.</param>
/// <returns>The <see cref="Image{TPixel}"/></returns>
/// <remarks>Passing zero for one of height or width within the resize options will automatically preserve the aspect ratio of the original image</remarks>
public static IImageProcessingContext <TPixel> Resize <TPixel>(this IImageProcessingContext <TPixel> source, ResizeOptions options)
where TPixel : struct, IPixel <TPixel>
{
return(source.Apply(img =>
{
// Cheat and bound through a run, inside here we should just be mutating, this really needs moving over to a processor
// Ensure size is populated across both dimensions.
if (options.Size.Width == 0 && options.Size.Height > 0)
{
options.Size = new Size((int)MathF.Round(img.Width * options.Size.Height / (float)img.Height), options.Size.Height);
}
if (options.Size.Height == 0 && options.Size.Width > 0)
{
options.Size = new Size(options.Size.Width, (int)MathF.Round(img.Height * options.Size.Width / (float)img.Width));
}
Rectangle targetRectangle = ResizeHelper.CalculateTargetLocationAndBounds(img.Frames.RootFrame, options);
img.Mutate(x => Resize(x, options.Size.Width, options.Size.Height, options.Sampler, targetRectangle, options.Compand));
}));
}
public static IImageProcessingContext <HalfSingle> FillMandelbrot(this IImageProcessingContext <HalfSingle> source, double ox, double oy, double scale, int iterations)
{
return(source.Apply(image => image._FillMandelbrot(ox, oy, scale, iterations)));
}
public static IImageProcessingContext <TPixel> FillCheckers <TPixel>(this IImageProcessingContext <TPixel> source, int cellWidth, int cellHeight, TPixel oddColor, TPixel evenColor) where TPixel : struct, IPixel <TPixel>
{
return(source.Apply(img => img._FillCheckers(cellWidth, cellHeight, oddColor, evenColor)));
}
public static IImageProcessingContext <TPixel> SetSubjectInfo <TPixel>(this IImageProcessingContext <TPixel> source, SubjectInfo sinfo) where TPixel : struct, IPixel <TPixel>
{
return(source.Apply(img => img.SetSubjectInfo(sinfo)));
}
public static IImageProcessingContext <TPixel> OuterGlow <TPixel>(this IImageProcessingContext <TPixel> source, float radius) where TPixel : struct, IPixel <TPixel>
{
return(source.Apply(img => _ApplyOuterGlow(img, radius)));
}
public static IImageProcessingContext <TPixel> PremultiplyAlpha <TPixel>(this IImageProcessingContext <TPixel> source) where TPixel : struct, IPixel <TPixel>
{
return(source.Apply(img => _ApplyAlphaPremultiply(img.ToPixelSampler())));
}
public static IImageProcessingContext <TPixel> ApplyCommonEffect <TPixel>(this IImageProcessingContext <TPixel> source, CommonEffect <TPixel> effect) where TPixel : struct, IPixel <TPixel>
{
return(source.Apply(img => _ApplyCommonEffect <TPixel>(img, effect)));
}
public static IImageProcessingContext <TPixel> FillRGB <TPixel>(this IImageProcessingContext <TPixel> source, TPixel rgb) where TPixel : struct, IPixel <TPixel>
{
return(source.Apply(img => _FillRGB(img.ToPixelSampler(), rgb.ToVector4())));
}
public static IImageProcessingContext <TPixel> EdgePaddingAlpha <TPixel>(this IImageProcessingContext <TPixel> source, float minAlpha) where TPixel : struct, IPixel <TPixel>
{
return(source.Apply(img => _ApplyEdgePadding(img, minAlpha, int.MaxValue)));
}
public static IImageProcessingContext <HalfSingle> FillRandomNoise(this IImageProcessingContext <HalfSingle> source, int blurRadius = 0, int randomSeed = 177)
{
return(source.Apply(image => image._FillRandomNoise(blurRadius, randomSeed)));
}
public static IImageProcessingContext <TPixel> ApplyPolarDistort <TPixel>(this IImageProcessingContext <TPixel> dc, bool inverse) where TPixel : struct, IPixel <TPixel>
{
return(dc.Apply(image => image._DistortImage(inverse)));
}
public static IImageProcessingContext <HalfSingle> FillPerlinNoise(this IImageProcessingContext <HalfSingle> source, float scale = 16, int repeat = 0, int octaves = 8, double persistence = 0.1f, int randomSeed = 177)
{
return(source.Apply(image => image._FillPerlinNoise(scale, repeat, octaves, persistence, randomSeed)));
}
public static IImageProcessingContext <TPixel> ApplyScalingWaterMarkWordWrap <TPixel>(this IImageProcessingContext <TPixel> processingContext, Font font, string text, TPixel color, float padding)
where TPixel : struct, IPixel <TPixel>
{
return(processingContext.Apply(img =>
{
float targetWidth = img.Width - (padding * 2);
float targetHeight = img.Height - (padding * 2);
float targetMinHeight = img.Height - (padding * 3); // must be with in a margin width of the target height
// now we are working i 2 dimensions at once and can't just scale because it will cause the text to
// reflow we need to just try multiple times
var scaledFont = font;
SizeF s = new SizeF(float.MaxValue, float.MaxValue);
float scaleFactor = (scaledFont.Size / 2);// everytime we change direction we half this size
int trapCount = (int)scaledFont.Size * 2;
if (trapCount < 10)
{
trapCount = 10;
}
bool isTooSmall = false;
while ((s.Height > targetHeight || s.Height < targetMinHeight) && trapCount > 0)
{
if (s.Height > targetHeight)
{
if (isTooSmall)
{
scaleFactor = scaleFactor / 2;
}
scaledFont = new Font(scaledFont, scaledFont.Size - scaleFactor);
isTooSmall = false;
}
if (s.Height < targetMinHeight)
{
if (!isTooSmall)
{
scaleFactor = scaleFactor / 2;
}
scaledFont = new Font(scaledFont, scaledFont.Size + scaleFactor);
isTooSmall = true;
}
trapCount--;
s = TextMeasurer.Measure(text, new RendererOptions(scaledFont)
{
WrappingWidth = targetWidth
});
}
var center = new PointF(padding, img.Height / 2);
var textGraphicOptions = new TextGraphicsOptions(true)
{
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Center,
WrapTextWidth = targetWidth
};
img.Mutate(i => i.DrawText(textGraphicOptions, text, scaledFont, color, center));
}));
}
public static IImageProcessingContext <TPixel> ApplyScalingedText <TPixel>(this IImageProcessingContext <TPixel> processingContext, Font font, string text, string highlight,
TPixel color, TPixel colorHighlight, float padding, int maxFontSize)
where TPixel : struct, IPixel <TPixel>
{
return(processingContext.Apply(image =>
{
float targetWidth = image.Width - (padding * 2);
float targetHeight = image.Height - (padding * 2);
float targetMinHeight = image.Height - (padding * 3) - 100; // must be with in a margin width of the target height
// now we are working in 2 dimensions at once and can't just scale because it will cause the text to
// reflow we need to just try multiple times
var scaledFont = font;
SizeF s = new SizeF(float.MaxValue, float.MaxValue);
float scaleFactor = (scaledFont.Size / 2);// everytime we change direction we half this size
int trapCount = (int)scaledFont.Size * 2;
if (trapCount < 10)
{
trapCount = 10;
}
bool isTooSmall = false;
while ((s.Height > targetHeight || s.Height < targetMinHeight) && trapCount > 0)
{
if (s.Height > targetHeight)
{
if (isTooSmall)
{
scaleFactor = scaleFactor / 2;
}
scaledFont = new Font(scaledFont, scaledFont.Size - scaleFactor);
isTooSmall = false;
}
if (s.Height < targetMinHeight)
{
if (!isTooSmall)
{
scaleFactor = scaleFactor / 2;
}
scaledFont = new Font(scaledFont, scaledFont.Size + scaleFactor);
isTooSmall = true;
}
trapCount--;
s = TextMeasurer.Measure(text, new RendererOptions(scaledFont)
{
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
WrappingWidth = targetWidth
});
}
var location = new PointF(padding, padding);
var textGraphicOptions = new TextGraphicsOptions(true)
{
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top,
WrapTextWidth = targetWidth
};
if (scaledFont.Size > maxFontSize)
{
scaledFont = new Font(scaledFont, maxFontSize);
}
image.Mutate(ctx =>
{
foreach (string word in text.Split(new[] { ' ' }, options: System.StringSplitOptions.None))
{
var wordSize = TextMeasurer.Measure(word, new RendererOptions(scaledFont)
{
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top
//WrappingWidth = targetWidth
});
// Wort zu langen. Umbrechen.
if (location.X + wordSize.Width > targetWidth)
{
//location = new PointF(padding, location.Y + wordSize.Height);
location = new PointF(padding, location.Y + scaledFont.Size);
}
foreach (char c in word + " ")
{
ctx.DrawText(textGraphicOptions, c.ToString(), scaledFont, color, location);
var charSize = TextMeasurer.Measure(c.ToString(), new RendererOptions(scaledFont)
{
HorizontalAlignment = HorizontalAlignment.Left,
VerticalAlignment = VerticalAlignment.Top
});
location = new PointF(location.X + charSize.Width, location.Y);
}
}
//ctx.DrawText(textGraphicOptions, text, scaledFont, color, location);
//ctx.DrawText(textGraphicOptions, highlight, scaledFont, colorHighlight, location);
});
}));
}
