use std::mem;
use std::ptr;
use std::slice;
use libc::{c_ulong, c_void};
use std::ffi::CString;
use std::ops::Deref;
use std::fmt;
#[cfg(feature = "use_glib")]
use glib::translate::*;
use ffi;
use ::enums::{
Content,
Format,
Status,
SurfaceType,
};
use ::image_surface::ImageSurface;
use ::rectangle_int::RectangleInt;
#[derive(Debug)]
pub struct Surface(*mut ffi::cairo_surface_t, bool);
impl Surface {
pub unsafe fn from_raw_none(ptr: *mut ffi::cairo_surface_t) -> Surface {
assert!(!ptr.is_null());
ffi::cairo_surface_reference(ptr);
Surface(ptr, false)
}
pub unsafe fn from_raw_borrow(ptr: *mut ffi::cairo_surface_t) -> Surface {
assert!(!ptr.is_null());
Surface(ptr, true)
}
pub unsafe fn from_raw_full(ptr: *mut ffi::cairo_surface_t) -> Surface {
assert!(!ptr.is_null());
Surface(ptr, false)
}
pub fn to_raw_none(&self) -> *mut ffi::cairo_surface_t {
self.0
}
pub fn create_similar(&self, content: Content, width: i32, height: i32) -> Surface {
unsafe {
Self::from_raw_full(ffi::cairo_surface_create_similar(self.0,
content.into(),
width,
height))
}
}
pub fn get_mime_data(&self, mime_type: &str) -> Option<Vec<u8>> {
let data_ptr: *mut u8 = ptr::null_mut();
let mut length: c_ulong = 0;
unsafe {
let mime_type = CString::new(mime_type).unwrap();
ffi::cairo_surface_get_mime_data(
self.to_raw_none(),
mime_type.as_ptr(),
&data_ptr,
&mut length,
);
if !data_ptr.is_null() && length != 0 {
Some(slice::from_raw_parts(
data_ptr as *const u8,
length as usize,
).to_vec()
)
} else {
None
}
}
}
pub unsafe fn get_mime_data_raw(&self, mime_type: &str) -> Option<&[u8]> {
let data_ptr: *mut u8 = ptr::null_mut();
let mut length: c_ulong = 0;
let mime_type = CString::new(mime_type).unwrap();
ffi::cairo_surface_get_mime_data(
self.to_raw_none(),
mime_type.as_ptr(),
&data_ptr,
&mut length,
);
if !data_ptr.is_null() && length != 0 {
Some(slice::from_raw_parts(
data_ptr as *const u8,
length as usize,
)
)
} else {
None
}
}
pub fn set_mime_data<T: AsRef<[u8]> + 'static>(
&self,
mime_type: &str,
slice: T) -> Result<(), Status> {
let b = Box::new(slice);
let (size, data) = {
let slice = (*b).as_ref();
(slice.len(), slice.as_ptr())
};
let user_data = Box::into_raw(b);
let status = unsafe {
let mime_type = CString::new(mime_type).unwrap();
ffi::cairo_surface_set_mime_data(self.to_raw_none(),
mime_type.as_ptr(),
data,
size as c_ulong,
Some(unbox::<T>),
user_data as *mut _,
)
};
match Status::from(status) {
Status::Success => Ok(()),
x => Err(x),
}
}
pub fn supports_mime_type(&self, mime_type: &str) -> bool {
unsafe {
let mime_type = CString::new(mime_type).unwrap();
ffi::cairo_surface_supports_mime_type(self.0, mime_type.as_ptr()).as_bool()
}
}
pub fn set_device_offset(&self, x_offset: f64, y_offset: f64) {
unsafe { ffi::cairo_surface_set_device_offset(self.to_raw_none(), x_offset, y_offset) }
}
pub fn get_device_offset(&self) -> (f64, f64) {
let mut x_offset = 0.0f64;
let mut y_offset = 0.0f64;
unsafe { ffi::cairo_surface_get_device_offset(self.to_raw_none(), &mut x_offset, &mut y_offset); }
(x_offset, y_offset)
}
#[cfg(any(feature = "v1_14", feature = "dox"))]
pub fn set_device_scale(&self, x_scale: f64, y_scale: f64) {
unsafe { ffi::cairo_surface_set_device_scale(self.to_raw_none(), x_scale, y_scale) }
}
#[cfg(any(feature = "v1_14", feature = "dox"))]
pub fn get_device_scale(&self) -> (f64, f64) {
let mut x_scale = 0.0f64;
let mut y_scale = 0.0f64;
unsafe { ffi::cairo_surface_get_device_scale(self.to_raw_none(), &mut x_scale, &mut y_scale); }
(x_scale, y_scale)
}
pub fn set_fallback_resolution(&self, x_pixels_per_inch: f64, y_pixels_per_inch: f64) {
unsafe { ffi::cairo_surface_set_fallback_resolution(self.to_raw_none(), x_pixels_per_inch, y_pixels_per_inch) }
}
pub fn get_fallback_resolution(&self) -> (f64, f64) {
let mut x_pixels_per_inch = 0.0f64;
let mut y_pixels_per_inch = 0.0f64;
unsafe { ffi::cairo_surface_get_fallback_resolution(self.to_raw_none(), &mut x_pixels_per_inch, &mut y_pixels_per_inch); }
(x_pixels_per_inch, y_pixels_per_inch)
}
pub fn create_similar_image(&self, format: Format, width: i32, height: i32) -> Option<Surface> {
unsafe {
let p = ffi::cairo_surface_create_similar_image(self.to_raw_none(), format.into(), width, height);
if p.is_null() {
None
} else {
Some(Self::from_raw_full(p))
}
}
}
pub fn map_to_image(&self, extents: Option<RectangleInt>) -> Result<MappedImageSurface, Status> {
unsafe {
ImageSurface::from_raw_full(match extents {
Some(ref e) => ffi::cairo_surface_map_to_image(self.to_raw_none(), e.to_raw_none()),
None => ffi::cairo_surface_map_to_image(self.to_raw_none(), 0 as *const _),
}).map(|s| {
MappedImageSurface {
original_surface: self.clone(),
image_surface: s,
}
})
}
}
}
#[cfg(feature = "use_glib")]
impl<'a> ToGlibPtr<'a, *mut ffi::cairo_surface_t> for Surface {
type Storage = &'a Surface;
#[inline]
fn to_glib_none(&'a self) -> Stash<'a, *mut ffi::cairo_surface_t, Self> {
Stash(self.to_raw_none(), self)
}
#[inline]
fn to_glib_full(&self) -> *mut ffi::cairo_surface_t {
unsafe {
ffi::cairo_surface_reference(self.to_raw_none())
}
}
}
#[cfg(feature = "use_glib")]
impl FromGlibPtrNone<*mut ffi::cairo_surface_t> for Surface {
#[inline]
unsafe fn from_glib_none(ptr: *mut ffi::cairo_surface_t) -> Surface {
Self::from_raw_none(ptr)
}
}
#[cfg(feature = "use_glib")]
impl FromGlibPtrBorrow<*mut ffi::cairo_surface_t> for Surface {
#[inline]
unsafe fn from_glib_borrow(ptr: *mut ffi::cairo_surface_t) -> Surface {
Self::from_raw_borrow(ptr)
}
}
#[cfg(feature = "use_glib")]
impl FromGlibPtrFull<*mut ffi::cairo_surface_t> for Surface {
#[inline]
unsafe fn from_glib_full(ptr: *mut ffi::cairo_surface_t) -> Surface {
Self::from_raw_full(ptr)
}
}
#[cfg(feature = "use_glib")]
gvalue_impl!(Surface, ffi::cairo_surface_t, ffi::gobject::cairo_gobject_surface_get_type);
impl AsRef<Surface> for Surface {
fn as_ref(&self) -> &Surface {
self
}
}
impl Clone for Surface {
fn clone(&self) -> Surface {
unsafe { Self::from_raw_none(self.0) }
}
}
impl Drop for Surface {
fn drop(&mut self) {
if !self.1 {
unsafe { ffi::cairo_surface_destroy(self.0); }
}
}
}
impl fmt::Display for Surface {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Surface")
}
}
pub trait SurfaceExt {
fn flush(&self);
fn finish(&self);
fn get_type(&self) -> SurfaceType;
fn status(&self) -> Status;
}
impl<O: AsRef<Surface>> SurfaceExt for O {
fn flush(&self) {
unsafe { ffi::cairo_surface_flush(self.as_ref().0); }
}
fn finish(&self) {
unsafe { ffi::cairo_surface_finish(self.as_ref().0); }
}
fn get_type(&self) -> SurfaceType {
unsafe { SurfaceType::from(ffi::cairo_surface_get_type(self.as_ref().0)) }
}
fn status(&self) -> Status {
unsafe { Status::from(ffi::cairo_surface_status(self.as_ref().0)) }
}
}
#[derive(Debug)]
pub struct MappedImageSurface {
original_surface: Surface,
image_surface: ImageSurface,
}
impl Deref for MappedImageSurface {
type Target = ImageSurface;
fn deref(&self) -> &ImageSurface {
&self.image_surface
}
}
impl Drop for MappedImageSurface {
fn drop(&mut self) {
unsafe {
ffi::cairo_surface_unmap_image(self.original_surface.to_raw_none(),
self.image_surface.to_raw_none());
ffi::cairo_surface_reference(self.image_surface.to_raw_none());
}
}
}
impl fmt::Display for MappedImageSurface {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "MappedImageSurface")
}
}
pub(crate) trait SurfacePriv {
unsafe fn set_user_data<K, T>(&self, key: &K, data: Box<T>) -> Result<(), Status>;
}
impl<O: AsRef<Surface>> SurfacePriv for O {
unsafe fn set_user_data<K, T>(&self, key: &K, data: Box<T>) -> Result<(), Status> {
let ptr: *mut T = Box::into_raw(data);
assert_eq!(mem::size_of::<*mut c_void>(), mem::size_of_val(&ptr));
let status = ffi::cairo_surface_set_user_data(self.as_ref().0, key as *const _ as *mut _,
ptr as *mut c_void, Some(unbox::<T>));
match Status::from(status) {
Status::Success => Ok(()),
x => Err(x),
}
}
}
unsafe extern "C" fn unbox<T>(data: *mut c_void) {
let data: Box<T> = Box::from_raw(data as *mut T);
drop(data);
}
#[cfg(test)]
mod tests {
use Format;
use ImageSurface;
use constants::MIME_TYPE_PNG;
#[test]
fn mime_data() {
let surface = ImageSurface::create(Format::ARgb32, 500, 500).unwrap();
let data = surface.get_mime_data(MIME_TYPE_PNG);
assert!(data.is_none());
assert!(surface.set_mime_data(MIME_TYPE_PNG, &[1u8, 10u8]).is_ok());
let data = surface.get_mime_data(MIME_TYPE_PNG).unwrap();
assert_eq!(data, &[1u8, 10u8]);
}
}