wlroots 0.4.0

Wayland compositor framework
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use std::marker::PhantomData;

use libc::c_int;
use wlroots_sys::{wl_shm_format, wlr_texture, wlr_texture_get_size};

/// Wrapper around wl_shm_format, to make it easier and nicer to type.
#[repr(u32)]
pub enum TextureFormat {
    ARGB8888 = wl_shm_format::WL_SHM_FORMAT_ARGB8888 as u32,
    XRGB8888 = wl_shm_format::WL_SHM_FORMAT_XRGB8888 as u32,
    C8 = wl_shm_format::WL_SHM_FORMAT_C8 as u32,
    RGB332 = wl_shm_format::WL_SHM_FORMAT_RGB332 as u32,
    BGR233 = wl_shm_format::WL_SHM_FORMAT_BGR233 as u32,
    XRGB4444 = wl_shm_format::WL_SHM_FORMAT_XRGB4444 as u32,
    XBGR4444 = wl_shm_format::WL_SHM_FORMAT_XBGR4444 as u32,
    RGBX4444 = wl_shm_format::WL_SHM_FORMAT_RGBX4444 as u32,
    BGRX4444 = wl_shm_format::WL_SHM_FORMAT_BGRX4444 as u32,
    ARGB4444 = wl_shm_format::WL_SHM_FORMAT_ARGB4444 as u32,
    ABGR4444 = wl_shm_format::WL_SHM_FORMAT_ABGR4444 as u32,
    RGBA4444 = wl_shm_format::WL_SHM_FORMAT_RGBA4444 as u32,
    BGRA4444 = wl_shm_format::WL_SHM_FORMAT_BGRA4444 as u32,
    XRGB1555 = wl_shm_format::WL_SHM_FORMAT_XRGB1555 as u32,
    XBGR1555 = wl_shm_format::WL_SHM_FORMAT_XBGR1555 as u32,
    RGBX5551 = wl_shm_format::WL_SHM_FORMAT_RGBX5551 as u32,
    BGRX5551 = wl_shm_format::WL_SHM_FORMAT_BGRX5551 as u32,
    ARGB1555 = wl_shm_format::WL_SHM_FORMAT_ARGB1555 as u32,
    ABGR1555 = wl_shm_format::WL_SHM_FORMAT_ABGR1555 as u32,
    RGBA5551 = wl_shm_format::WL_SHM_FORMAT_RGBA5551 as u32,
    BGRA5551 = wl_shm_format::WL_SHM_FORMAT_BGRA5551 as u32,
    RGB565 = wl_shm_format::WL_SHM_FORMAT_RGB565 as u32,
    BGR565 = wl_shm_format::WL_SHM_FORMAT_BGR565 as u32,
    RGB888 = wl_shm_format::WL_SHM_FORMAT_RGB888 as u32,
    BGR888 = wl_shm_format::WL_SHM_FORMAT_BGR888 as u32,
    XBGR8888 = wl_shm_format::WL_SHM_FORMAT_XBGR8888 as u32,
    RGBX8888 = wl_shm_format::WL_SHM_FORMAT_RGBX8888 as u32,
    BGRX8888 = wl_shm_format::WL_SHM_FORMAT_BGRX8888 as u32,
    ABGR8888 = wl_shm_format::WL_SHM_FORMAT_ABGR8888 as u32,
    RGBA8888 = wl_shm_format::WL_SHM_FORMAT_RGBA8888 as u32,
    BGRA8888 = wl_shm_format::WL_SHM_FORMAT_BGRA8888 as u32,
    XRGB2101010 = wl_shm_format::WL_SHM_FORMAT_XRGB2101010 as u32,
    XBGR2101010 = wl_shm_format::WL_SHM_FORMAT_XBGR2101010 as u32,
    RGBX1010102 = wl_shm_format::WL_SHM_FORMAT_RGBX1010102 as u32,
    BGRX1010102 = wl_shm_format::WL_SHM_FORMAT_BGRX1010102 as u32,
    ARGB2101010 = wl_shm_format::WL_SHM_FORMAT_ARGB2101010 as u32,
    ABGR2101010 = wl_shm_format::WL_SHM_FORMAT_ABGR2101010 as u32,
    RGBA1010102 = wl_shm_format::WL_SHM_FORMAT_RGBA1010102 as u32,
    BGRA1010102 = wl_shm_format::WL_SHM_FORMAT_BGRA1010102 as u32,
    YUYV = wl_shm_format::WL_SHM_FORMAT_YUYV as u32,
    YVYU = wl_shm_format::WL_SHM_FORMAT_YVYU as u32,
    UYVY = wl_shm_format::WL_SHM_FORMAT_UYVY as u32,
    VYUY = wl_shm_format::WL_SHM_FORMAT_VYUY as u32,
    AYUV = wl_shm_format::WL_SHM_FORMAT_AYUV as u32,
    NV12 = wl_shm_format::WL_SHM_FORMAT_NV12 as u32,
    NV21 = wl_shm_format::WL_SHM_FORMAT_NV21 as u32,
    NV16 = wl_shm_format::WL_SHM_FORMAT_NV16 as u32,
    NV61 = wl_shm_format::WL_SHM_FORMAT_NV61 as u32,
    YUV410 = wl_shm_format::WL_SHM_FORMAT_YUV410 as u32,
    YVU410 = wl_shm_format::WL_SHM_FORMAT_YVU410 as u32,
    YUV411 = wl_shm_format::WL_SHM_FORMAT_YUV411 as u32,
    YVU411 = wl_shm_format::WL_SHM_FORMAT_YVU411 as u32,
    YUV420 = wl_shm_format::WL_SHM_FORMAT_YUV420 as u32,
    YVU420 = wl_shm_format::WL_SHM_FORMAT_YVU420 as u32,
    YUV422 = wl_shm_format::WL_SHM_FORMAT_YUV422 as u32,
    YVU422 = wl_shm_format::WL_SHM_FORMAT_YVU422 as u32,
    YUV444 = wl_shm_format::WL_SHM_FORMAT_YUV444 as u32,
    YVU444 = wl_shm_format::WL_SHM_FORMAT_YVU444 as u32
}

impl Into<wl_shm_format> for TextureFormat {
    fn into(self) -> wl_shm_format {
        // NOTE Rationale for transmute:
        // * Easiest way to convert to the value type
        // * Is safe because of the definitions above linking them together.
        unsafe { ::std::mem::transmute(self as u32) }
    }
}

#[derive(Debug, Eq, PartialEq, Hash)]
/// A wrapper for a wlr_texture.
///
/// For textures created from `GenericRenderer::create_texture_from_pixels`, the lifetime
/// will be `'static` because the memory will be owned by the user.
pub struct Texture<'surface> {
    texture: *mut wlr_texture,
    phantom: PhantomData<&'surface ()>
}

impl <'surface> Texture<'surface> {
    pub(crate) unsafe fn from_ptr<'unbound>(texture: *mut wlr_texture) -> Texture<'unbound> {
        Texture { texture, phantom: PhantomData }
    }

    pub(crate) unsafe fn as_ptr(&self) -> *mut wlr_texture {
        self.texture
    }

    /// Gets the size of the texture.
    ///
    /// Return value is in (width, height) format.
    pub fn size(&self) -> (c_int, c_int) {
        unsafe {
            let (mut width, mut height) = (0, 0);
            wlr_texture_get_size(self.texture, &mut width, &mut height);
            (width, height)
        }
    }
}