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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Bool Draws an image in the specified area. CGRect Returns the bounding box of a clipping path.

Saving and Restoring the Current Graphics State

Creates cgcontexr new graphics context from the specified Core Graphics context and the initial flipped state. NSWindow Creates and returns a new graphics context for drawing into a window. Begins a new page in a PDF graphics context. If S is 1the point in the clipping area is unchanged. Paints the areas contained within the provided rectangles, using the fill color in the current graphics state. Returns the color space of a bitmap context. Returns a pointer to the image data associated with a bitmap context.

rotate(by:) – CGContext | Apple Developer Documentation

Int Returns the height in cgdontext of a bitmap context. CGInterpolation Quality Returns the current level of interpolation quality for a graphics context. If mask is an image, then it must be in the DeviceGray color space, may not have an alpha component, and may not be masked by an image mask or masking color. CGRect Draws the contents cgcontxet a layer object into the specified rectangle.

Paints the area cgconteext within the provided rectangle, using the fill color in the current graphics state. The attributes used to create this instance. CGImage Maps a mask into the specified rectangle and intersects it with the current clipping area of the graphics context. Enables shadowing with color a graphics context. Sets a destination to jump to when a point in the current page of a PDF graphics context is clicked. Int Returns the bits per component of a bitmap context. A mutable graphics path: Getting the Core Image Context.

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Do you understand, or I unnecessarily complicate? CGPoint Draws the contents of a layer object at the specified point. Saving and Restoring Graphics State.

CGRect Adds an ellipse that fits inside 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. Managing a Page-Based Graphics Context. CGPoint Returns the current point in a non-empty path. CGRect Paints the area of the ellipse that fits inside the provided rectangle, using the fill color in the current graphics state.

The NSGraphics Context class is an abstract superclass for destination-specific graphics contexts. CGAffine Transform Returns the current transformation matrix. Maps a mask into the specified rectangle and intersects it with the current clipping area of the graphics context.

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sketchyTech: Swift: Translating and Rotating a CGContext, A Visual Explanation (iOS/Xcode)

Drawing Core Graphics Layers. For example, if S is 0then the point in the clipping area becomes transparent. Compositing operators, described in terms of having source and destination images, each having an opaque and transparent region. Email Required, but never shown. I’ve just tested your code, and as Peter said, it should work.

CGText Encoding Sets the font and font size in a graphics context.

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If the mask parameter is an image mask, then Core Graphics clips in a manner identical to the behavior seen with the draw in: CGPoint Appends a straight line segment from the current point to the specified point. Managing the Color Rendering Intent. Sets the clipping path to the intersection of the current clipping path with the area defined by the specified rectangle.

Declaration func clip to rect: Bool Adds an arc of a circle to the current path, specified with a radius and angles. Maps a mask into the specified rectangle and intersects it with the current clipping area of the graphics context.

Int Draws an array of glyphs with varying referennce. Assuming that you mean that you want to draw the image ‘inside’ your figure, the easiest way would be to create a cgpath of 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.

Examining the Current Graphics Path. Instantiates and returns a new graphics context using the supplied NSBitmap Refrrence Rep object as the context destination. Drawing Gradients and Shadings. If the value of the source sample in mask is Sthen the corresponding point in the current clipping area is multiplied by an alpha of S.

Each graphics context contains its own graphics environment and state.