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use std::ptr;
use base::CGFloat;
use core_foundation::base::{CFRetain, CFTypeID};
use core_foundation::data::CFData;
use color_space::CGColorSpace;
use data_provider::{CGDataProviderRef, CGDataProvider};
use geometry::CGRect;
use libc::size_t;
use foreign_types::{ForeignType, ForeignTypeRef};
#[repr(C)]
pub enum CGImageAlphaInfo {
CGImageAlphaNone, /* For example, RGB. */
CGImageAlphaPremultipliedLast, /* For example, premultiplied RGBA */
CGImageAlphaPremultipliedFirst, /* For example, premultiplied ARGB */
CGImageAlphaLast, /* For example, non-premultiplied RGBA */
CGImageAlphaFirst, /* For example, non-premultiplied ARGB */
CGImageAlphaNoneSkipLast, /* For example, RBGX. */
CGImageAlphaNoneSkipFirst, /* For example, XRBG. */
CGImageAlphaOnly /* No color data, alpha data only */
}
#[repr(C)]
pub enum CGImageByteOrderInfo {
CGImageByteOrderMask = 0x7000,
CGImageByteOrder16Little = 1 << 12,
CGImageByteOrder32Little = 2 << 12,
CGImageByteOrder16Big = 3 << 12,
CGImageByteOrder32Big = 4 << 12
}
foreign_type! {
#[doc(hidden)]
pub unsafe type CGImage {
type CType = ::sys::CGImage;
fn drop = CGImageRelease;
fn clone = |p| CFRetain(p as *const _) as *mut _;
}
}
impl CGImage {
pub fn new(width: size_t,
height: size_t,
bits_per_component: size_t,
bits_per_pixel: size_t,
bytes_per_row: size_t,
colorspace: &CGColorSpace,
bitmap_info: u32,
provider: &CGDataProvider,
should_interpolate: bool,
rendering_intent: u32)
-> Self {
unsafe {
let result = CGImageCreate(width,
height,
bits_per_component,
bits_per_pixel,
bytes_per_row,
colorspace.as_ptr(),
bitmap_info,
provider.as_ptr(),
ptr::null_mut(),
should_interpolate,
rendering_intent);
assert!(!result.is_null());
Self::from_ptr(result)
}
}
pub fn type_id() -> CFTypeID {
unsafe {
CGImageGetTypeID()
}
}
}
impl CGImageRef {
pub fn width(&self) -> size_t {
unsafe {
CGImageGetWidth(self.as_ptr())
}
}
pub fn height(&self) -> size_t {
unsafe {
CGImageGetHeight(self.as_ptr())
}
}
pub fn bits_per_component(&self) -> size_t {
unsafe {
CGImageGetBitsPerComponent(self.as_ptr())
}
}
pub fn bits_per_pixel(&self) -> size_t {
unsafe {
CGImageGetBitsPerPixel(self.as_ptr())
}
}
pub fn bytes_per_row(&self) -> size_t {
unsafe {
CGImageGetBytesPerRow(self.as_ptr())
}
}
pub fn color_space(&self) -> CGColorSpace {
unsafe {
let cs = CGImageGetColorSpace(self.as_ptr());
CFRetain(cs as *mut _);
CGColorSpace::from_ptr(cs)
}
}
/// Returns the raw image bytes wrapped in `CFData`. Note, the returned `CFData` owns the
/// underlying buffer.
pub fn data(&self) -> CFData {
let data_provider = unsafe {
CGDataProviderRef::from_ptr(CGImageGetDataProvider(self.as_ptr()))
};
data_provider.copy_data()
}
/// Returns a cropped image. If the `rect` specifies a rectangle which lies outside of the
/// image bounds, the `None` is returned.
pub fn cropped(&self, rect: CGRect) -> Option<CGImage> {
let image_ptr = unsafe { CGImageCreateWithImageInRect(self.as_ptr(), rect) };
if !image_ptr.is_null() {
Some(unsafe { CGImage::from_ptr(image_ptr) })
} else {
None
}
}
}
#[link(name = "CoreGraphics", kind = "framework")]
extern {
fn CGImageGetTypeID() -> CFTypeID;
fn CGImageGetWidth(image: ::sys::CGImageRef) -> size_t;
fn CGImageGetHeight(image: ::sys::CGImageRef) -> size_t;
fn CGImageGetBitsPerComponent(image: ::sys::CGImageRef) -> size_t;
fn CGImageGetBitsPerPixel(image: ::sys::CGImageRef) -> size_t;
fn CGImageGetBytesPerRow(image: ::sys::CGImageRef) -> size_t;
fn CGImageGetColorSpace(image: ::sys::CGImageRef) -> ::sys::CGColorSpaceRef;
fn CGImageGetDataProvider(image: ::sys::CGImageRef) -> ::sys::CGDataProviderRef;
fn CGImageRelease(image: ::sys::CGImageRef);
fn CGImageCreate(width: size_t,
height: size_t,
bitsPerComponent: size_t,
bitsPerPixel: size_t,
bytesPerRow: size_t,
space: ::sys::CGColorSpaceRef,
bitmapInfo: u32,
provider: ::sys::CGDataProviderRef,
decode: *const CGFloat,
shouldInterpolate: bool,
intent: u32)
-> ::sys::CGImageRef;
fn CGImageCreateWithImageInRect(image: ::sys::CGImageRef, rect: CGRect) -> ::sys::CGImageRef;
//fn CGImageGetAlphaInfo(image: ::sys::CGImageRef) -> CGImageAlphaInfo;
//fn CGImageCreateCopyWithColorSpace(image: ::sys::CGImageRef, space: ::sys::CGColorSpaceRef) -> ::sys::CGImageRef
}