If you don’t want to make a custom panel as suggested in @Sinatr’s answer you can draw the border yourself: private void panel1_Paint(object sender, PaintEventArgs e) { ControlPaint.DrawBorder(e.Graphics, this.panel1.ClientRectangle, Color.DarkBlue, ButtonBorderStyle.Solid); }
import numpy as np import cv2 import matplotlib.pyplot as plt a3 = np.array( [[[10,10],[100,10],[100,100],[10,100]]], dtype=np.int32 ) im = np.zeros([240,320],dtype=np.uint8) cv2.fillPoly( im, a3, 255 ) plt.imshow(im) plt.show() Check on colab.research.google.com
In OpenGL, lines are rasterized using the “Diamond Exit” rule. This is almost the same as saying that the end coordinate is exclusive, but not quite… This is what the OpenGL spec has to say: http://www.opengl.org/documentation/specs/version1.1/glspec1.1/node47.html Also have a look at the OpenGL FAQ, http://www.opengl.org/archives/resources/faq/technical/rasterization.htm, item “14.090 How do I obtain exact pixelization of lines?”. … Read more
Here is a simple CSS-only solution, using linear gradients: html, body, .grid { height: 100%; width: 100%; margin: 0; } .grid { background-image: repeating-linear-gradient(#ccc 0 1px, transparent 1px 100%), repeating-linear-gradient(90deg, #ccc 0 1px, transparent 1px 100%); background-size: 71px 71px; } <div class=”grid”></div>
Instead of allocating a new canvas on each repaint, you should be able to allocate it once and then reuse the canvas on each repaint. on init and on resize: Bitmap b = Bitmap.createBitmap(getWidth(), getHeight(), Bitmap.Config.ARGB_8888); Canvas c = new Canvas(b); on repaint: b.eraseColor(Color.TRANSPARENT); // needed if backColor is not opaque; thanks @JosephEarl c.drawColor(backColor); c.drawCircle(cx, … 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
PorterDuff.Mode.CLEAR doesn’t work with hardware acceleration. Just set view.setLayerType(View.LAYER_TYPE_SOFTWARE, null); Works perfectly for me.
No you can’t; the stroke is always centered. The only things you can control are: stroke miter stroke cap stroke join stroke width You must manually account for the stroke width when defining your drawing paths.
I made something like this a while ago and turned it into a jquery plugin. have a look over here, if it’s what you’re after I’ll post a more detailed answer and dig out the simplified jquery version from my archives: http://jsfiddle.net/95tft/ EDIT OK, sorry I couldn’t do this yesterday: Originally the code above was … Read more
The Desktop (including the Bitmap on it) is actually drawn by the window system itself. So that is basically quite deep and old, too. So according to the changes that happened since NT4 I suppose that the painting is actually done in win32k.sys . The driver was created to replace win32.dll which would have done … Read more