show_image/features/
raqote.rs

1//! Support for the [`raqote`][::raqote] crate.
2
3use crate::error::ImageDataError;
4use crate::BoxImage;
5use crate::Image;
6use crate::ImageInfo;
7
8impl From<raqote::DrawTarget> for Image {
9	fn from(other: raqote::DrawTarget) -> Self {
10		let info = match draw_target_info(&other) {
11			Ok(x) => x,
12			Err(e) => return Image::Invalid(e),
13		};
14
15		let length = other.get_data_u8().len();
16		let buffer = Box::into_raw(other.into_vec().into_boxed_slice()) as *mut u8;
17		let buffer = unsafe { Box::from_raw(std::slice::from_raw_parts_mut(buffer, length)) };
18
19		BoxImage::new(info, buffer).into()
20	}
21}
22
23impl From<&raqote::DrawTarget> for Image {
24	fn from(other: &raqote::DrawTarget) -> Self {
25		let info = match draw_target_info(other) {
26			Ok(x) => x,
27			Err(e) => return Image::Invalid(e),
28		};
29
30		let buffer = Box::from(other.get_data_u8());
31
32		BoxImage::new(info, buffer).into()
33	}
34}
35
36impl From<raqote::Image<'_>> for Image {
37	fn from(other: raqote::Image) -> Self {
38		let info = match image_info(&other) {
39			Ok(x) => x,
40			Err(e) => return Image::Invalid(e),
41		};
42
43		let buffer = other.data.as_ptr() as *const u8;
44		let buffer = unsafe { Box::from(std::slice::from_raw_parts(buffer, other.data.len() * 4)) };
45
46		BoxImage::new(info, buffer).into()
47	}
48}
49
50fn draw_target_info(draw_target: &raqote::DrawTarget) -> Result<ImageInfo, ImageDataError> {
51	if draw_target.width() < 0 || draw_target.height() < 0 {
52		Err(format!("DrawTarget has negative size: [{}, {}]", draw_target.width(), draw_target.height()).into())
53	} else {
54		Ok(ImageInfo::bgra8_premultiplied(
55			draw_target.width() as u32,
56			draw_target.height() as u32,
57		))
58	}
59}
60
61fn image_info(&image: &raqote::Image) -> Result<ImageInfo, ImageDataError> {
62	if image.width < 0 || image.height < 0 {
63		Err(format!("DrawTarget has negative size: [{}, {}]", image.width, image.height).into())
64	} else {
65		Ok(ImageInfo::bgra8_premultiplied(image.width as u32, image.height as u32))
66	}
67}
show_image/features/raqote.rs

show_image/features/
raqote.rs
