drawingbrush | 易学教程

HTML5 Canvas javascript smudge brush tool

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问题 I need idea how i can make brush who can color smudge. Example in picture: right side painting with basic brush with two different colors in left also painting but additional use smudge tool, the result should be something like left side I need advice how i can try to do it 回答1: You will need to manipulate pixels to achieve a smudge effect. You can get the pixel information from the canvas using context.getImageData . As the user moves an imaginary brush over existing pixels, you can mimic

Can I have a composite shape as a resource in WinRT XAML?

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问题 I'm developing a Windows 8 Metro-style application and I want to use vector images. As there seems to be no direct support for svg images, I am trying to use a xaml fragment consisting of multiple shapes (a path and some lines) as an image. I would like to have a resource dictionary entry with the composite shape and be able to include it in different pages. Ideally, I would also like to be able to resolve a specific composite shape from a data bound property. From what I've read, the WPF

Creating line pattern in code behind with WPF

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问题 I'm trying to convert the following XAML code into code behind version: <DrawingBrush x:Key="HatchBrush" TileMode="Tile" Viewport="0,0,30,30" ViewportUnits="Absolute" Viewbox="0,0,30,30" ViewboxUnits="Absolute"> <DrawingBrush.Drawing> <GeometryDrawing> <GeometryDrawing.Pen> <Pen Brush="Black" Thickness="5"/> </GeometryDrawing.Pen> <GeometryDrawing.Geometry> <Geometry>M0,0 L30,30 M15,-15 L45,15 M-15,15 L15,45</Geometry> </GeometryDrawing.Geometry> </GeometryDrawing> </DrawingBrush.Drawing> <

Can I have a composite shape as a resource in WinRT XAML?

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I'm developing a Windows 8 Metro-style application and I want to use vector images. As there seems to be no direct support for svg images, I am trying to use a xaml fragment consisting of multiple shapes (a path and some lines) as an image. I would like to have a resource dictionary entry with the composite shape and be able to include it in different pages. Ideally, I would also like to be able to resolve a specific composite shape from a data bound property. From what I've read, the WPF approach was to have a VisualBrush or DrawingBrush consisting of the shapes, but there are no such classes

How do I convert from a Brush (e.g. DrawingBrush) to a BitmapSource?

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问题 I have a DrawingBrush with some vector graphics. I want to convert it to BitmapSource as an intermediate step to getting it to Bitmap. What's the (best) way to do this? 回答1: public static BitmapSource BitmapSourceFromBrush(Brush drawingBrush, int size = 32, int dpi = 96) { // RenderTargetBitmap = builds a bitmap rendering of a visual var pixelFormat = PixelFormats.Pbgra32; RenderTargetBitmap rtb = new RenderTargetBitmap(size, size, dpi, dpi, pixelFormat); // Drawing visual allows us to

How do I convert from a Brush (e.g. DrawingBrush) to a BitmapSource?

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I have a DrawingBrush with some vector graphics. I want to convert it to BitmapSource as an intermediate step to getting it to Bitmap. What's the (best) way to do this? public static BitmapSource BitmapSourceFromBrush(Brush drawingBrush, int size = 32, int dpi = 96) { // RenderTargetBitmap = builds a bitmap rendering of a visual var pixelFormat = PixelFormats.Pbgra32; RenderTargetBitmap rtb = new RenderTargetBitmap(size, size, dpi, dpi, pixelFormat); // Drawing visual allows us to compose graphic drawing parts into a visual to render var drawingVisual = new DrawingVisual(); using