jay-compositor 1.15.0

The Jay compositor
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use crate::gfx_apis::vulkan::VulkanError;
use crate::gfx_apis::vulkan::device::DescriptorBufferDevice;
use crate::gfx_apis::vulkan::device::VulkanDevice;
use arrayvec::ArrayVec;
use ash::vk::DescriptorSetLayout;
use ash::vk::DescriptorSetLayoutBinding;
use ash::vk::DescriptorSetLayoutCreateFlags;
use ash::vk::DescriptorSetLayoutCreateInfo;
use ash::vk::DescriptorType;
use ash::vk::DeviceSize;
use ash::vk::ShaderStageFlags;
use std::rc::Rc;
use std::slice;

pub(super) struct VulkanDescriptorSetLayout {
    device: Rc<VulkanDevice>,
    pub(super) layout: DescriptorSetLayout,
    pub(super) size: DeviceSize,
    pub(super) offsets: ArrayVec<DeviceSize, 4>,
}

impl Drop for VulkanDescriptorSetLayout {
    fn drop(&mut self) {
        unsafe {
            self.device
                .device
                .destroy_descriptor_set_layout(self.layout, None);
        }
    }
}

impl VulkanDevice {
    pub(super) fn create_tex_legacy_descriptor_set_layout(
        self: &Rc<Self>,
    ) -> Result<Rc<VulkanDescriptorSetLayout>, VulkanError> {
        let binding = DescriptorSetLayoutBinding::default()
            .stage_flags(ShaderStageFlags::FRAGMENT)
            .descriptor_count(1)
            .descriptor_type(DescriptorType::COMBINED_IMAGE_SAMPLER);
        let create_info = DescriptorSetLayoutCreateInfo::default()
            .bindings(slice::from_ref(&binding))
            .flags(DescriptorSetLayoutCreateFlags::PUSH_DESCRIPTOR_KHR);
        let layout = unsafe { self.device.create_descriptor_set_layout(&create_info, None) };
        let layout = layout.map_err(VulkanError::CreateDescriptorSetLayout)?;
        Ok(Rc::new(VulkanDescriptorSetLayout {
            device: self.clone(),
            layout,
            size: 0,
            offsets: Default::default(),
        }))
    }

    pub(super) fn create_tex_sampler_descriptor_set_layout(
        self: &Rc<Self>,
    ) -> Result<Rc<VulkanDescriptorSetLayout>, VulkanError> {
        let binding = DescriptorSetLayoutBinding::default()
            .stage_flags(ShaderStageFlags::FRAGMENT)
            .descriptor_count(1)
            .descriptor_type(DescriptorType::SAMPLER);
        let create_info = DescriptorSetLayoutCreateInfo::default()
            .bindings(slice::from_ref(&binding))
            .flags(DescriptorSetLayoutCreateFlags::DESCRIPTOR_BUFFER_EXT);
        let layout = unsafe { self.device.create_descriptor_set_layout(&create_info, None) };
        let layout = layout.map_err(VulkanError::CreateDescriptorSetLayout)?;
        let db = self.descriptor_buffer.as_ref().unwrap();
        let size = db.get_descriptor_set_size(layout);
        let mut offsets = ArrayVec::new();
        unsafe {
            offsets.push(
                db.device
                    .get_descriptor_set_layout_binding_offset(layout, 0),
            );
        }
        Ok(Rc::new(VulkanDescriptorSetLayout {
            device: self.clone(),
            layout,
            size,
            offsets,
        }))
    }

    pub(super) fn create_tex_resource_descriptor_set_layout(
        self: &Rc<Self>,
    ) -> Result<Rc<VulkanDescriptorSetLayout>, VulkanError> {
        let bindings = [
            DescriptorSetLayoutBinding::default()
                .binding(0)
                .stage_flags(ShaderStageFlags::FRAGMENT)
                .descriptor_count(1)
                .descriptor_type(DescriptorType::SAMPLED_IMAGE),
            DescriptorSetLayoutBinding::default()
                .binding(1)
                .stage_flags(ShaderStageFlags::FRAGMENT)
                .descriptor_count(1)
                .descriptor_type(DescriptorType::UNIFORM_BUFFER),
            DescriptorSetLayoutBinding::default()
                .binding(2)
                .stage_flags(ShaderStageFlags::FRAGMENT)
                .descriptor_count(1)
                .descriptor_type(DescriptorType::UNIFORM_BUFFER),
            DescriptorSetLayoutBinding::default()
                .binding(3)
                .stage_flags(ShaderStageFlags::FRAGMENT)
                .descriptor_count(1)
                .descriptor_type(DescriptorType::UNIFORM_BUFFER),
        ];
        let create_info = DescriptorSetLayoutCreateInfo::default()
            .bindings(&bindings)
            .flags(DescriptorSetLayoutCreateFlags::DESCRIPTOR_BUFFER_EXT);
        let layout = unsafe { self.device.create_descriptor_set_layout(&create_info, None) };
        let layout = layout.map_err(VulkanError::CreateDescriptorSetLayout)?;
        let db = self.descriptor_buffer.as_ref().unwrap();
        let size = db.get_descriptor_set_size(layout);
        let mut offsets = ArrayVec::new();
        unsafe {
            let db = &db.device;
            offsets.push(db.get_descriptor_set_layout_binding_offset(layout, 0));
            offsets.push(db.get_descriptor_set_layout_binding_offset(layout, 1));
            offsets.push(db.get_descriptor_set_layout_binding_offset(layout, 2));
            offsets.push(db.get_descriptor_set_layout_binding_offset(layout, 3));
        }
        Ok(Rc::new(VulkanDescriptorSetLayout {
            device: self.clone(),
            layout,
            size,
            offsets,
        }))
    }
}

impl DescriptorBufferDevice {
    fn get_descriptor_set_size(&self, layout: DescriptorSetLayout) -> DeviceSize {
        let mut size = unsafe { self.device.get_descriptor_set_layout_size(layout) };
        size = (size + self.descriptor_buffer_offset_mask) & !self.descriptor_buffer_offset_mask;
        size
    }
}