You can do this pretty simply using the EncodedImage.scaleImage32() method. You’ll need to provide it with the factors by which you want to scale the width and height (as a Fixed32). Here’s some sample code which determines the scale factor for the width and height by dividing the original image size by the desired size, … Read more
I found sixlettervariables’ solution the most workable one. However, there’s a “drawingContext.Close()” missing. According to MSDN, “A DrawingContext must be closed before its content can be rendered”. The result is the following utility function: public static BitmapSource CreateBitmap( int width, int height, double dpi, Action<DrawingContext> render) { DrawingVisual drawingVisual = new DrawingVisual(); using (DrawingContext drawingContext … Read more
public static GraphicsPath RoundedRect(Rectangle bounds, int radius) { int diameter = radius * 2; Size size = new Size(diameter, diameter); Rectangle arc = new Rectangle(bounds.Location, size); GraphicsPath path = new GraphicsPath(); if (radius == 0) { path.AddRectangle(bounds); return path; } // top left arc path.AddArc(arc, 180, 90); // top right arc arc.X = bounds.Right – … Read more
You need to have two drawing calls: One for the non-persistent line that follows the cursor in the MouseMove using someControls.CreateGraphics the other for the persisting line, triggered in the MouseUp, where you store the coordinates and call Invalidate on your canvas control and draw in the Paint event of your canvas using its e.Graphics … Read more
Bitmap screenshot; view.setDrawingCacheEnabled(true); screenshot = Bitmap.createBitmap(view.getDrawingCache()); view.setDrawingCacheEnabled(false); You need Bitmap.createBitmap(view.getDrawingCache()); as the Bitmap from which the reference is received by getDrawingCache() gets recycled.
This is probably simpler than you’re thinking: int w = WIDTH_PX, h = HEIGHT_PX; Bitmap.Config conf = Bitmap.Config.ARGB_8888; // see other conf types Bitmap bmp = Bitmap.createBitmap(w, h, conf); // this creates a MUTABLE bitmap Canvas canvas = new Canvas(bmp); // ready to draw on that bitmap through that canvas Here’s the official documentation on … Read more
Based on a clarification of the question, here’s an implementation of creating intermediary points along a <polyline> element such that the marker-mid=”url(#arrowhead)” attribute will work. See below that for an introduction to markers and arrowheads. Demo: http://jsfiddle.net/Zv57N/ midMarkers(document.querySelector(‘polyline’),6); // Given a polygon/polyline, create intermediary points along the // “straightaways” spaced no closer than `spacing` distance … Read more
Method 1: Call the Windows API You need System.Drawing and System.Runtime.InteropServices. You may need to add project references to them. using System.Runtime.InteropServices; using System.Drawing; Add the methods to your class with P/Invoke [DllImport(“User32.dll”)] public static extern IntPtr GetDC(IntPtr hwnd); [DllImport(“User32.dll”)] public static extern void ReleaseDC(IntPtr hwnd, IntPtr dc); Get a Graphics object for the entire … Read more
updated (08.Jul.2013) Updated with latest versions of libraries; html refactored using JsRender; updated (29.Sep.2011) Added GIT Repo; cleaned the code; update to latest framework versions; updated (03.Mar.2013) Fixed links with working example; Current example uses: HTML 5 doctype jQuery v.1.10.2 jQuery UI v.1.10.3 Raphael v.2.0.1 JsRender v.1pre35 (optional, used for HTML simplification) Source Source code … Read more
The result depends on which compositing rule is specified in the graphics context using setComposite(). This utility may be useful in understanding the various modes. It may also help you in preparing an sscce that exhibits the problem you describe. Addendum: Here’s an example that shows how one might use AlphaComposite.Src mode for this. import … Read more