ivy-vulkan 0.10.3

Low level vulkan abstractions for the Ivy game engine.
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use crate::{RenderPass, Result};
use ivy_base::Extent;
use std::sync::Arc;

use ash::vk;
use ash::vk::ImageView;
use ash::Device;

/// A framebuffer wraps one or more Textures contained in a renderpass.
/// The framebuffer does not own the Textures and as such the user must ensure the referenced
/// textures are kept alive. This is because a texture can be used in several framebuffers
/// simultaneously.
pub struct Framebuffer {
    device: Arc<Device>,
    framebuffer: vk::Framebuffer,
    extent: Extent,
}

impl Framebuffer {
    pub fn new(
        device: Arc<Device>,
        renderpass: &RenderPass,
        attachments: &[ImageView],
        extent: Extent,
    ) -> Result<Self> {
        let create_info = vk::FramebufferCreateInfo::builder()
            .render_pass(renderpass.renderpass())
            .attachments(&attachments)
            .width(extent.width)
            .height(extent.height)
            .layers(1);

        let framebuffer = unsafe { device.create_framebuffer(&create_info, None)? };

        Ok(Framebuffer {
            device,
            framebuffer,
            extent,
        })
    }

    pub fn framebuffer(&self) -> vk::Framebuffer {
        self.framebuffer
    }

    pub fn extent(&self) -> Extent {
        self.extent
    }
}

impl Drop for Framebuffer {
    fn drop(&mut self) {
        unsafe { self.device.destroy_framebuffer(self.framebuffer, None) }
    }
}