Struct CGContext 

pub struct CGContext { /* private fields */ }

Apple’s documentation

Implementations

impl CGContext

pub fn save_g_state(c: Option<&CGContext>)

Graphics state functions. *

pub fn restore_g_state(c: Option<&CGContext>)

pub fn scale_ctm(c: Option<&CGContext>, sx: f64, sy: f64)

Coordinate space transformations. *

pub fn translate_ctm(c: Option<&CGContext>, tx: f64, ty: f64)

pub fn rotate_ctm(c: Option<&CGContext>, angle: f64)

pub fn concat_ctm(c: Option<&CGContext>, transform: CGAffineTransform)

pub fn ctm(c: Option<&CGContext>) -> CGAffineTransform

pub fn set_line_width(c: Option<&CGContext>, width: f64)

Drawing attribute functions. *

pub fn set_line_cap(c: Option<&CGContext>, cap: CGLineCap)

pub fn set_line_join(c: Option<&CGContext>, join: CGLineJoin)

pub fn set_miter_limit(c: Option<&CGContext>, limit: f64)

pub unsafe fn set_line_dash( c: Option<&CGContext>, phase: f64, lengths: *const f64, count: usize, )

Safety

lengths must be a valid pointer or null.

pub fn set_flatness(c: Option<&CGContext>, flatness: f64)

pub fn set_alpha(c: Option<&CGContext>, alpha: f64)

pub fn set_blend_mode(c: Option<&CGContext>, mode: CGBlendMode)

pub fn begin_path(c: Option<&CGContext>)

Path construction functions. *

pub fn move_to_point(c: Option<&CGContext>, x: f64, y: f64)

pub fn add_line_to_point(c: Option<&CGContext>, x: f64, y: f64)

pub fn add_curve_to_point( c: Option<&CGContext>, cp1x: f64, cp1y: f64, cp2x: f64, cp2y: f64, x: f64, y: f64, )

pub fn add_quad_curve_to_point( c: Option<&CGContext>, cpx: f64, cpy: f64, x: f64, y: f64, )

pub fn close_path(c: Option<&CGContext>)

pub fn add_rect(c: Option<&CGContext>, rect: CGRect)

Path construction convenience functions. *

pub unsafe fn add_rects( c: Option<&CGContext>, rects: *const CGRect, count: usize, )

Safety

rects must be a valid pointer or null.

pub unsafe fn add_lines( c: Option<&CGContext>, points: *const CGPoint, count: usize, )

Safety

points must be a valid pointer or null.

pub fn add_ellipse_in_rect(c: Option<&CGContext>, rect: CGRect)

pub fn add_arc( c: Option<&CGContext>, x: f64, y: f64, radius: f64, start_angle: f64, end_angle: f64, clockwise: i32, )

pub fn add_arc_to_point( c: Option<&CGContext>, x1: f64, y1: f64, x2: f64, y2: f64, radius: f64, )

pub fn add_path(c: Option<&CGContext>, path: Option<&CGPath>)

pub fn replace_path_with_stroked_path(c: Option<&CGContext>)

pub fn is_path_empty(c: Option<&CGContext>) -> bool

Path information functions. *

pub fn path_current_point(c: Option<&CGContext>) -> CGPoint

pub fn path_bounding_box(c: Option<&CGContext>) -> CGRect

pub fn path(c: Option<&CGContext>) -> Option<CFRetained<CGPath>>

pub fn path_contains_point( c: Option<&CGContext>, point: CGPoint, mode: CGPathDrawingMode, ) -> bool

pub fn draw_path(c: Option<&CGContext>, mode: CGPathDrawingMode)

Path drawing functions. *

pub fn fill_path(c: Option<&CGContext>)

Path drawing convenience functions. *

pub fn eo_fill_path(c: Option<&CGContext>)

pub fn stroke_path(c: Option<&CGContext>)

pub fn fill_rect(c: Option<&CGContext>, rect: CGRect)

pub unsafe fn fill_rects( c: Option<&CGContext>, rects: *const CGRect, count: usize, )

Safety

rects must be a valid pointer or null.

pub fn stroke_rect(c: Option<&CGContext>, rect: CGRect)

pub fn stroke_rect_with_width(c: Option<&CGContext>, rect: CGRect, width: f64)

pub fn clear_rect(c: Option<&CGContext>, rect: CGRect)

pub fn fill_ellipse_in_rect(c: Option<&CGContext>, rect: CGRect)

pub fn stroke_ellipse_in_rect(c: Option<&CGContext>, rect: CGRect)

pub unsafe fn stroke_line_segments( c: Option<&CGContext>, points: *const CGPoint, count: usize, )

Safety

points must be a valid pointer or null.

pub fn clip(c: Option<&CGContext>)

Clipping functions. *

pub fn eo_clip(c: Option<&CGContext>)

pub fn reset_clip(&self)

pub fn clip_to_mask(c: Option<&CGContext>, rect: CGRect, mask: Option<&CGImage>)

pub fn clip_bounding_box(c: Option<&CGContext>) -> CGRect

pub fn clip_to_rect(c: Option<&CGContext>, rect: CGRect)

Clipping convenience functions. *

pub unsafe fn clip_to_rects( c: Option<&CGContext>, rects: NonNull<CGRect>, count: usize, )

Safety

rects must be a valid pointer.

pub fn set_fill_color_with_color(c: Option<&CGContext>, color: Option<&CGColor>)

Primitive color functions. *

pub fn set_stroke_color_with_color( c: Option<&CGContext>, color: Option<&CGColor>, )

pub fn set_fill_color_space(c: Option<&CGContext>, space: Option<&CGColorSpace>)

Color space functions. *

pub fn set_stroke_color_space( c: Option<&CGContext>, space: Option<&CGColorSpace>, )

pub unsafe fn set_fill_color(c: Option<&CGContext>, components: *const f64)

Color functions. *

Safety

components must be a valid pointer or null.

pub unsafe fn set_stroke_color(c: Option<&CGContext>, components: *const f64)

Safety

components must be a valid pointer or null.

pub unsafe fn set_fill_pattern( c: Option<&CGContext>, pattern: Option<&CGPattern>, components: *const f64, )

Pattern functions. *

Safety

components must be a valid pointer or null.

pub unsafe fn set_stroke_pattern( c: Option<&CGContext>, pattern: Option<&CGPattern>, components: *const f64, )

Safety

components must be a valid pointer or null.

pub fn set_pattern_phase(c: Option<&CGContext>, phase: CGSize)

pub fn set_gray_fill_color(c: Option<&CGContext>, gray: f64, alpha: f64)

Color convenience functions. *

pub fn set_gray_stroke_color(c: Option<&CGContext>, gray: f64, alpha: f64)

pub fn set_rgb_fill_color( c: Option<&CGContext>, red: f64, green: f64, blue: f64, alpha: f64, )

pub fn set_rgb_stroke_color( c: Option<&CGContext>, red: f64, green: f64, blue: f64, alpha: f64, )

pub fn set_cmyk_fill_color( c: Option<&CGContext>, cyan: f64, magenta: f64, yellow: f64, black: f64, alpha: f64, )

pub fn set_cmyk_stroke_color( c: Option<&CGContext>, cyan: f64, magenta: f64, yellow: f64, black: f64, alpha: f64, )

pub fn set_rendering_intent( c: Option<&CGContext>, intent: CGColorRenderingIntent, )

Rendering intent. *

pub fn set_edr_target_headroom(&self, headroom: f32) -> bool

pub fn edr_target_headroom(&self) -> f32

pub fn draw_image(c: Option<&CGContext>, rect: CGRect, image: Option<&CGImage>)

Image functions. *

pub fn draw_tiled_image( c: Option<&CGContext>, rect: CGRect, image: Option<&CGImage>, )

pub unsafe fn draw_image_applying_tone_mapping( &self, r: CGRect, image: &CGImage, method: CGToneMapping, options: Option<&CFDictionary>, ) -> bool

Safety

options generics must be of the correct type.

pub fn content_tone_mapping_info(&self) -> CGContentToneMappingInfo

pub unsafe fn set_content_tone_mapping_info( &self, info: CGContentToneMappingInfo, )

Safety

info struct field 2 must be a valid pointer or null.

pub fn interpolation_quality(c: Option<&CGContext>) -> CGInterpolationQuality

pub fn set_interpolation_quality( c: Option<&CGContext>, quality: CGInterpolationQuality, )

pub fn set_shadow_with_color( c: Option<&CGContext>, offset: CGSize, blur: f64, color: Option<&CGColor>, )

pub fn set_shadow(c: Option<&CGContext>, offset: CGSize, blur: f64)

pub fn draw_linear_gradient( c: Option<&CGContext>, gradient: Option<&CGGradient>, start_point: CGPoint, end_point: CGPoint, options: CGGradientDrawingOptions, )

pub fn draw_radial_gradient( c: Option<&CGContext>, gradient: Option<&CGGradient>, start_center: CGPoint, start_radius: f64, end_center: CGPoint, end_radius: f64, options: CGGradientDrawingOptions, )

pub fn draw_conic_gradient( &self, gradient: Option<&CGGradient>, center: CGPoint, angle: f64, )

pub fn draw_shading(c: Option<&CGContext>, shading: Option<&CGShading>)

pub fn set_character_spacing(c: Option<&CGContext>, spacing: f64)

Text functions. *

pub fn set_text_position(c: Option<&CGContext>, x: f64, y: f64)

pub fn text_position(c: Option<&CGContext>) -> CGPoint

pub fn set_text_matrix(c: Option<&CGContext>, t: CGAffineTransform)

pub fn text_matrix(c: Option<&CGContext>) -> CGAffineTransform

pub fn set_text_drawing_mode(c: Option<&CGContext>, mode: CGTextDrawingMode)

pub fn set_font(c: Option<&CGContext>, font: Option<&CGFont>)

pub fn set_font_size(c: Option<&CGContext>, size: f64)

pub unsafe fn show_glyphs_at_positions( c: Option<&CGContext>, glyphs: *const u16, lpositions: *const CGPoint, count: usize, )

Safety

• glyphs must be a valid pointer or null.
• lpositions must be a valid pointer or null.

pub fn draw_pdf_page(c: Option<&CGContext>, page: Option<&CGPDFPage>)

PDF functions. *

pub unsafe fn begin_page(c: Option<&CGContext>, media_box: *const CGRect)

Output page functions. *

Safety

media_box must be a valid pointer or null.

pub fn end_page(c: Option<&CGContext>)

pub fn flush(c: Option<&CGContext>)

pub fn synchronize(c: Option<&CGContext>)

pub fn synchronize_attributes(&self)

pub fn set_should_antialias(c: Option<&CGContext>, should_antialias: bool)

pub fn set_allows_antialiasing(c: Option<&CGContext>, allows_antialiasing: bool)

pub fn set_should_smooth_fonts(c: Option<&CGContext>, should_smooth_fonts: bool)

pub fn set_allows_font_smoothing( c: Option<&CGContext>, allows_font_smoothing: bool, )

pub fn set_should_subpixel_position_fonts( c: Option<&CGContext>, should_subpixel_position_fonts: bool, )

pub fn set_allows_font_subpixel_positioning( c: Option<&CGContext>, allows_font_subpixel_positioning: bool, )

pub fn set_should_subpixel_quantize_fonts( c: Option<&CGContext>, should_subpixel_quantize_fonts: bool, )

pub fn set_allows_font_subpixel_quantization( c: Option<&CGContext>, allows_font_subpixel_quantization: bool, )

pub unsafe fn begin_transparency_layer( c: Option<&CGContext>, auxiliary_info: Option<&CFDictionary>, )

Transparency layer support. *

Safety

auxiliary_info generics must be of the correct type.

pub unsafe fn begin_transparency_layer_with_rect( c: Option<&CGContext>, rect: CGRect, aux_info: Option<&CFDictionary>, )

Safety

aux_info generics must be of the correct type.

pub fn end_transparency_layer(c: Option<&CGContext>)

pub fn user_space_to_device_space_transform( c: Option<&CGContext>, ) -> CGAffineTransform

User space to device space tranformations. *

pub fn convert_point_to_device_space( c: Option<&CGContext>, point: CGPoint, ) -> CGPoint

pub fn convert_point_to_user_space( c: Option<&CGContext>, point: CGPoint, ) -> CGPoint

pub fn convert_size_to_device_space( c: Option<&CGContext>, size: CGSize, ) -> CGSize

pub fn convert_size_to_user_space(c: Option<&CGContext>, size: CGSize) -> CGSize

pub fn convert_rect_to_device_space( c: Option<&CGContext>, rect: CGRect, ) -> CGRect

pub fn convert_rect_to_user_space(c: Option<&CGContext>, rect: CGRect) -> CGRect

pub unsafe fn select_font( c: Option<&CGContext>, name: *const i8, size: f64, text_encoding: CGTextEncoding, )

👎Deprecated: No longer supported

Safety

name must be a valid pointer or null.

pub unsafe fn show_text(c: Option<&CGContext>, string: *const i8, length: usize)

👎Deprecated: No longer supported

Safety

string must be a valid pointer or null.

pub unsafe fn show_text_at_point( c: Option<&CGContext>, x: f64, y: f64, string: *const i8, length: usize, )

👎Deprecated: No longer supported

Safety

string must be a valid pointer or null.

pub unsafe fn show_glyphs(c: Option<&CGContext>, g: *const u16, count: usize)

👎Deprecated: No longer supported

Safety

g must be a valid pointer or null.

pub unsafe fn show_glyphs_at_point( c: Option<&CGContext>, x: f64, y: f64, glyphs: *const u16, count: usize, )

👎Deprecated: No longer supported

Safety

glyphs must be a valid pointer or null.

pub unsafe fn show_glyphs_with_advances( c: Option<&CGContext>, glyphs: *const u16, advances: *const CGSize, count: usize, )

👎Deprecated: No longer supported

Safety

• glyphs must be a valid pointer or null.
• advances must be a valid pointer or null.

pub fn draw_pdf_document( c: Option<&CGContext>, rect: CGRect, document: Option<&CGPDFDocument>, page: i32, )

👎Deprecated: No longer supported

impl CGContext

pub fn draw_layer_in_rect( context: Option<&CGContext>, rect: CGRect, layer: Option<&CGLayer>, )

pub fn draw_layer_at_point( context: Option<&CGContext>, point: CGPoint, layer: Option<&CGLayer>, )

Methods from Deref<Target = CFType>

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: ConcreteType,

Attempt to downcast the type to that of type T.

This is the reference-variant. Use CFRetained::downcast if you want to convert a retained type. See also ConcreteType for more details on which types support being converted to.

pub fn retain_count(&self) -> usize

Get the reference count of the object.

This function may be useful for debugging. You normally do not use this function otherwise.

Beware that some things (like CFNumbers, small CFStrings etc.) may not have a normal retain count for optimization purposes, and can return usize::MAX in that case.

Trait Implementations

impl AsRef<AnyObject> for CGContext

fn as_ref(&self) -> &AnyObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<CFType> for CGContext

fn as_ref(&self) -> &CFType

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<CGContext> for CGContext

fn as_ref(&self) -> &CGContext

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<AnyObject> for CGContext

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<CFType> for CGContext

fn borrow(&self) -> &CFType

Immutably borrows from an owned value.

impl ConcreteType for CGContext

fn type_id() -> usize

Get the unique CFTypeID identifier for the type.

impl Debug for CGContext

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Deref for CGContext

type Target = CFType

The resulting type after dereferencing.

fn deref(&self) -> &<CGContext as Deref>::Target

Dereferences the value.

impl Hash for CGContext

fn hash<H>(&self, state: &mut H)

where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Message for CGContext

fn retain(&self) -> Retained<Self>

where Self: Sized,

Increment the reference count of the receiver.

impl PartialEq for CGContext

fn eq(&self, other: &CGContext) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RefEncode for CGContext

const ENCODING_REF: Encoding

The Objective-C type-encoding for a reference of this type.

impl Type for CGContext

fn retain(&self) -> CFRetained<Self>

where Self: Sized,

Increment the reference count of the receiver.

fn as_concrete_TypeRef(&self) -> &Self

👎Deprecated: this is redundant

Helper for easier transition from the core-foundation crate.

unsafe fn wrap_under_get_rule(ptr: *const Self) -> CFRetained<Self>

where Self: Sized,

👎Deprecated: use CFRetained::retain

Helper for easier transition from the core-foundation crate.

fn as_CFTypeRef(&self) -> &CFType

where Self: AsRef<CFType>,

👎Deprecated: this is redundant (CF types deref to CFType)

Helper for easier transition from the core-foundation crate.

unsafe fn wrap_under_create_rule(ptr: *const Self) -> CFRetained<Self>

where Self: Sized,

👎Deprecated: use CFRetained::from_raw

Helper for easier transition from the core-foundation crate.

impl Eq for CGContext