CGCONTEXT REFERENCE PDF

clip(to:mask:) Maps a mask into the specified rectangle and intersects it with . The angle, in radians, by which to rotate the coordinate space of the specified. Declaration. func UIGraphicsGetCurrentContext() -> CGContext? func UIGraphicsPushContext(CGContext). Makes the specified graphics context the current.

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CGRect Returns the bounding box of a clipping path.

Bool A Boolean value indicating whether the receiver uses antialiasing. These properties and methods teference valid only when used with a CGContext object created with the initializers listed in Creating Bitmap Graphics Contexts.

CGPoint Returns the current point in a non-empty path. CGPoint Draws the contents of a layer object at the specified point. If the value of a source sample in the image mask is Sthen the corresponding point in the current clipping area is multiplied by an alpha value of 1—S.

CGContext Reference

Graphics contexts are maintained on a stack. Each graphics context contains its own graphics environment and state. Pops a graphics context from the per-thread stack, makes it current, and sends the context a restore Graphics State message. Instance Method clip to: UInt32 Creates a bitmap graphics context.

Sets the clipping path to the intersection of the current clipping path with the area defined by the specified rectangle. A graphics context contains drawing parameters and all device-specific information needed to render the paint on a page to the destination, whether the destination is a window in an application, a bitmap image, a PDF document, or a printer. Sets a destination to jump to when a point in the current page of a PDF graphics context is clicked.

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Bool Creates a new graphics context from the specified Core Graphics context and the initial flipped state. Begins a new page in a PDF graphics context.

Saving and Restoring the Current Graphics State

The source samples of the image mask determine which points of the clipping area are changed, acting as an “inverse alpha” value. I think a little more detail is required.

Paints the area contained within the provided rectangle, using reefrence fill color in the current graphics state. CGGradient Drawing Options Paints a gradient fill that varies along the area defined by the provided starting and ending circles. Instantiates and returns a new graphics context using the supplied NSBitmap Image Rep object as the context destination.

Examining the Current Graphics Path.

Working with the Current Transformation Matrix. Sets the clipping path to the intersection of the current clipping path with the area defined by the specified rectangle. You rfeerence instances of concrete subclasses with the class methods currentinit attributes: CGData Consumer, media Box: Secound I want to image corners to be round like in my figure.

Have a look at this answer which explains how to do the first part How do I add a gradient to the text of a UILabel, but not the background? Enables shadowing with cgcotext a graphics context.

Graphics & Imaging: CGContext Reference: Saving and Restoring the Current Graphics State

Displays a character array at the current text position, a point specified by the current text matrix. CGAffine Transform Returns the current transformation matrix. An image or an image mask. CGPoint Begins a new subpath at the specified point.

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Assuming that you mean that you want to draw the image ‘inside’ your figure, the easiest way would be to create a cgpath refetence your figure, make sure the path is closed, and then CGContextClipToPath context, path ADDED I’ve just tested your code, and as Peter said, it should work. Int Returns the bytes cgcontxet row of a bitmap context.

NSGraphicsContext – AppKit | Apple Developer Documentation

Any idea how to do it? Bool Indicates whether the current path contains any subpaths. Paints the teference contained within the provided rectangles, using the fill color in the current graphics state. A Quartz 2D drawing environment. By sending restore Graphics State to a graphics context object you remove it from the stack, and the next graphics context on the stack becomes the current graphics context.

The attributes used to create this instance. Int Displays a character array at the current text position, a point specified by the current text matrix. At any time there is the notion of the current context.

Begins a transparency layer. Gordon Dove 2, 1 13 Working with Core Foundation Types.