use libc::{c_ulong, c_void};
use std::ffi::CString;
use std::fmt;
use std::ops::Deref;
use std::ptr;
use std::slice;
use enums::{Content, Format, SurfaceType};
use error::Error;
use ffi;
#[cfg(feature = "use_glib")]
use glib::translate::*;
use utils::status_to_result;
use device::Device;
use image_surface::ImageSurface;
use rectangle::Rectangle;
use rectangle_int::RectangleInt;
#[derive(Debug)]
pub struct Surface(ptr::NonNull<ffi::cairo_surface_t>);
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::NonNull::new_unchecked(ptr))
}
pub unsafe fn from_raw_borrow(ptr: *mut ffi::cairo_surface_t) -> ::Borrowed<Surface> {
assert!(!ptr.is_null());
::Borrowed::new(Surface(ptr::NonNull::new_unchecked(ptr)))
}
pub unsafe fn from_raw_full(ptr: *mut ffi::cairo_surface_t) -> Result<Surface, Error> {
assert!(!ptr.is_null());
let status = ffi::cairo_surface_status(ptr);
status_to_result(status)?;
Ok(Surface(ptr::NonNull::new_unchecked(ptr)))
}
pub fn to_raw_none(&self) -> *mut ffi::cairo_surface_t {
self.0.as_ptr()
}
pub fn create_similar(
&self,
content: Content,
width: i32,
height: i32,
) -> Result<Surface, Error> {
unsafe {
Self::from_raw_full(ffi::cairo_surface_create_similar(
self.0.as_ptr(),
content.into(),
width,
height,
))
}
}
pub fn create_for_rectangle(&self, bounds: Rectangle) -> Result<Surface, Error> {
unsafe {
Self::from_raw_full(ffi::cairo_surface_create_for_rectangle(
self.0.as_ptr(),
bounds.x,
bounds.y,
bounds.width,
bounds.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<(), Error> {
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);
unsafe extern "C" fn unbox<T>(data: *mut c_void) {
let data: Box<T> = Box::from_raw(data as *mut T);
drop(data);
}
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 _,
)
};
status_to_result(status)
}
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.as_ptr(), mime_type.as_ptr()).as_bool()
}
}
pub fn get_device(&self) -> Option<Device> {
unsafe {
let device = ffi::cairo_surface_get_device(self.to_raw_none());
if device.is_null() {
None
} else {
Some(Device::from_raw_none(device))
}
}
}
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,
) -> Result<Surface, Error> {
unsafe {
Self::from_raw_full(ffi::cairo_surface_create_similar_image(
self.to_raw_none(),
format.into(),
width,
height,
))
}
}
pub fn map_to_image(&self, extents: Option<RectangleInt>) -> Result<MappedImageSurface, Error> {
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(), std::ptr::null()),
})
.map(|s| MappedImageSurface {
original_surface: self.clone(),
image_surface: s,
})
}
}
pub fn mark_dirty(&self) {
unsafe { ffi::cairo_surface_mark_dirty(self.to_raw_none()) }
}
pub fn mark_dirty_rectangle(&self, x: i32, y: i32, width: i32, height: i32) {
unsafe { ffi::cairo_surface_mark_dirty_rectangle(self.to_raw_none(), x, y, width, height) }
}
user_data_methods! {
ffi::cairo_surface_get_user_data,
ffi::cairo_surface_set_user_data,
}
}
#[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) -> ::Borrowed<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).unwrap()
}
}
#[cfg(feature = "use_glib")]
gvalue_impl!(
Surface,
ffi::cairo_surface_t,
ffi::gobject::cairo_gobject_surface_get_type
);
impl Clone for Surface {
fn clone(&self) -> Surface {
unsafe { Self::from_raw_none(self.0.as_ptr()) }
}
}
impl Drop for Surface {
fn drop(&mut self) {
unsafe {
ffi::cairo_surface_destroy(self.0.as_ptr());
}
}
}
impl fmt::Display for Surface {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Surface")
}
}
impl Surface {
pub fn flush(&self) {
unsafe {
ffi::cairo_surface_flush(self.0.as_ptr());
}
}
pub fn finish(&self) {
unsafe {
ffi::cairo_surface_finish(self.0.as_ptr());
}
}
pub fn get_type(&self) -> SurfaceType {
unsafe { SurfaceType::from(ffi::cairo_surface_get_type(self.0.as_ptr())) }
}
}
#[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")
}
}
#[cfg(test)]
mod tests {
use constants::MIME_TYPE_PNG;
use Format;
use ImageSurface;
#[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]);
}
}