Canvas Manipulating Images
How to Manipulate an Image
To manipulate an image, follow these steps
- canvas - Assigning the canvas element to a variable.
- ctx - Assigning the 2d rendering context to another variable by calling the
- img - Assigning a blank DOM object for a HTML img element by using the Image class to a variable.
- src - Setting the src attribute to the path of a valid image file, you load that image into the image object just as if you set the src attribute of an actual HTML img element.
- drawImage() - Use
drawImage()canvas method to provide different ways to draw an image onto the canvas.
- font - Use
fontcanvas property to specify the current text style to use when drawing text.
- fillStyle - Use
fillStylecanvas property to specify the color to use inside shapes (any shape).
- fillText() - Use
fillText()canvas method to draw a text string at the specified coordinates, filling the string's characters with the current fillStyle.
|image||Required||Specifies an element to draw into the context.|
|sx||Optional||Specifies the x-axis coordinate of the top left corner of the sub-rectangle of the source image to draw into the destination context.|
|sy||Optional||Specifies the y-axis coordinate of the top left corner of the sub-rectangle of the source image to draw into the destination context.|
|sWidth||Optional||Specifies the width of the sub-rectangle of the source image to draw into the destination context.|
|sHeight||Optional||Specifies the height of the sub-rectangle of the source image to draw into the destination context.|
|dx||Required||Specifies the x-axis coordinate in the destination canvas at which to place the top-left corner of the source image.|
|dy||Required||Specifies the y-axis coordinate in the destination canvas at which to place the top-left corner of the source image.|
|dWidth||Optional||Specifies the width to draw the image in the destination canvas.|
|dHeight||Optional||Specifies the height to draw the image in the destination canvas.|
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