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#[cfg(feature = "rafx-metal")]
use crate::metal::RafxTextureMetal;
#[cfg(feature = "rafx-vulkan")]
use crate::vulkan::RafxTextureVulkan;
use crate::RafxTextureDef;

/// An image that can be used by the GPU.
///
/// Textures must not be dropped if they are in use by the GPU.
#[derive(Debug)]
pub enum RafxTexture {
    #[cfg(feature = "rafx-vulkan")]
    Vk(RafxTextureVulkan),
    #[cfg(feature = "rafx-metal")]
    Metal(RafxTextureMetal),
}

impl RafxTexture {
    /// Return the metadata used to create the texture
    pub fn texture_def(&self) -> &RafxTextureDef {
        match self {
            #[cfg(feature = "rafx-vulkan")]
            RafxTexture::Vk(inner) => inner.texture_def(),
            #[cfg(feature = "rafx-metal")]
            RafxTexture::Metal(_inner) => unimplemented!(),
        }
    }

    /// Get the underlying vulkan API object. This provides access to any internally created
    /// vulkan objects.
    #[cfg(feature = "rafx-vulkan")]
    pub fn vk_texture(&self) -> Option<&RafxTextureVulkan> {
        match self {
            #[cfg(feature = "rafx-vulkan")]
            RafxTexture::Vk(inner) => Some(inner),
            #[cfg(feature = "rafx-metal")]
            RafxTexture::Metal(_inner) => None,
        }
    }

    /// Get the underlying metal API object. This provides access to any internally created
    /// metal objects.
    #[cfg(feature = "rafx-metal")]
    pub fn metal_texture(&self) -> Option<&RafxTextureMetal> {
        match self {
            #[cfg(feature = "rafx-vulkan")]
            RafxTexture::Vk(_inner) => None,
            #[cfg(feature = "rafx-metal")]
            RafxTexture::Metal(inner) => Some(inner),
        }
    }
}