climage 0.1.0

Rust implementation of image processing library with OpenCL.
Documentation 
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use super::context::ClContext;
use super::imageproc::ImageProc;
use ocl::{Kernel, Program};

static KERNEL_SRC: &'static str = r#"
__constant sampler_t sampler_const = CLK_NORMALIZED_COORDS_FALSE |
                                    CLK_ADDRESS_NONE |
                                    CLK_FILTER_NEAREST;
__kernel void vflip(
    __read_only image2d_t src_image,
    __write_only image2d_t dst_image) {
    int2 gid = (int2)(get_global_id(0), get_global_id(1));
    int2 size = get_image_dim(src_image);

    if(all(gid < size)){
        uint4 pixel = read_imageui(src_image, sampler_const, gid);
        write_imageui(dst_image, (int2)(gid.x, size.y - gid.y - 1), pixel);
    }
}
"#;

pub struct VFlip<'a> {
    context: &'a ClContext,
    program: Program,
    kernel: Option<Kernel>,
}

impl<'a> VFlip<'a> {
    pub fn new(context: &'a ClContext) -> Self {
        let program = Program::builder()
            .src(KERNEL_SRC)
            .build(&context.context)
            .unwrap();
        VFlip {
            context,
            program,
            kernel: None,
        }
    }
}

impl<'a> ImageProc for VFlip<'a> {
    fn build_kernel(
        &mut self,
        src_img: &crate::ClImageBuffer,
        dst_img: &mut crate::ClImageBuffer,
    ) -> &mut Self {
        let kernel = ocl::Kernel::builder()
            .program(&self.program)
            .name("vflip")
            .queue(self.context.queue.clone())
            .global_work_size(src_img.dimensions())
            .arg(&src_img.data)
            .arg(&dst_img.data)
            .build()
            .unwrap();
        self.kernel = Some(kernel);
        self
    }
    fn run(&self) {
        unsafe { self.kernel.as_ref().unwrap().enq().unwrap() };
    }
}