Drawing shapes and writing text on image online editing
- DRAWING SHAPES AND WRITING TEXT ON IMAGE ONLINE EDITING HOW TO
- DRAWING SHAPES AND WRITING TEXT ON IMAGE ONLINE EDITING FULL
- DRAWING SHAPES AND WRITING TEXT ON IMAGE ONLINE EDITING CODE
The last line is drawn automatically when you call fill(). Notice how lineTo() is called only twice, but you need three lines for a triangle.
DRAWING SHAPES AND WRITING TEXT ON IMAGE ONLINE EDITING CODE
The code for a triangle is almost similar to that of a separate line, only this time lineTo() is called multiple times.
DRAWING SHAPES AND WRITING TEXT ON IMAGE ONLINE EDITING HOW TO
Here's an example of how to draw a triangle: This enables you to create a triangle by working with multiple separate lines. And what about a triangle?īy using multiple commands you can draw up more complex shapes. fill() wouldn't work here since the path only consists of a single line and has no real surface. When you have completed your path, consisting of just a line in this case, you can call stroke() to stroke the path and actually make it visible. From there you can draw a line with the lineTo() function. It doesn't really draw anything on its own, it only tells on which coordinates to start. The next call to moveTo() is telling the context where to start drawing the path on your canvas. Here's an example of how to draw a line:ĭrawing a line starts again with calling beginPath() to mark the start of a new path. It is done by calling the lineTo() function. How to draw a basic line?Īnother basic path action is that of drawing a line. This example circle starts at an angle of zero and ends at an angle of two times pie, making a perfect circle.Īfter running this code you can see your circle drawn on the canvas.
DRAWING SHAPES AND WRITING TEXT ON IMAGE ONLINE EDITING FULL
The arc() function is the one who defines an arc-shaped path, in this case a full circle. You can see it begins by starting a new path with the beginPath() function and ends with fill() to draw the path to the canvas.Ĭontext.arc(200, 100, 50, 0, 2 * Math.PI) The next code demonstrates how to draw a circle. Here are some quick examples to get the basic idea of how to apply paths. After defining the path, you can call fill() or stroke() to draw the path to the canvas. This can be a circle or a line for example. Paths start by calling beginPath() on the context (this will clear the context of any existing paths). Paths - Circles, lines, triangles and many other shapes.But if you want to draw anything else, like a triangle or circle, you'll have to use a path. You could use the rectangle to draw a square, by making a rectangle with even sides. The CanvasRenderingContext2D only supports two primitive shapes, rectangles and paths. Until you change the fill style of course. This means that every next drawing operation will use the same paint as the current. Also notice how the paint color isn't passed into the fill function, it is stored in the context. You could say you first define the brush you want to use and then start to paint. If you want the center of the image you can find the height and width and divide that by 2 to find the center of the image and than can plot the rectangle parameters accordingly.This is how most canvas operations work. So before you actually make your make your text You can see where this rectanlge will be created on the image. g.DrawRectangle(new Pen(Color.Red, 2), 655, 460, 535, 90) Line is used to show where your text will be written.
G.DrawString("My\nText", new ("Tahoma", 32, FontStyle.Bold), Brushes.Black, rectf, sf) Sf.LineAlignment = StringAlignment.Center
G.PixelOffsetMode = PixelOffsetMode.HighQuality G.InterpolationMode = InterpolationMode.HighQualityBicubic G.SmoothingMode = SmoothingMode.AntiAlias Using(Graphics g = Graphics.FromImage(myBitmap)) rectf = new RectangleF(655, 460, 535, 90) //rectf for My Text