2022-12-25 17:18:11 +11:00
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use ash::vk;
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use crate::error;
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use crate::vulkan_primitives::VulkanBuffer;
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2022-12-22 14:03:38 +11:00
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#[rustfmt::skip]
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2022-12-25 17:18:11 +11:00
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static VBO_OFFSCREEN: &[f32; 16] = &[
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2022-12-11 17:06:28 +11:00
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// Offscreen
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2022-12-22 14:03:38 +11:00
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-1.0, -1.0, 0.0, 0.0,
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-1.0, 1.0, 0.0, 1.0,
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1.0, -1.0, 1.0, 0.0,
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1.0, 1.0, 1.0, 1.0,
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2022-12-11 17:06:28 +11:00
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];
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2022-12-22 14:03:38 +11:00
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#[rustfmt::skip]
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2022-12-25 17:18:11 +11:00
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static VBO_DEFAULT_FINAL: &[f32; 16] = &[
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2022-12-11 17:06:28 +11:00
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// Final
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2022-12-22 14:03:38 +11:00
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0.0, 0.0, 0.0, 0.0,
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0.0, 1.0, 0.0, 1.0,
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1.0, 0.0, 1.0, 0.0,
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1.0, 1.0, 1.0, 1.0,
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2022-12-11 17:06:28 +11:00
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];
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2022-12-25 17:18:11 +11:00
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pub enum VboType {
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Offscreen,
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Final
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}
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pub struct DrawQuad {
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buffer: VulkanBuffer,
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device: ash::Device
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}
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impl DrawQuad {
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pub fn new(device: &ash::Device, mem_props: &vk::PhysicalDeviceMemoryProperties) -> error::Result<DrawQuad> {
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let mut buffer = VulkanBuffer::new(device, mem_props, vk::BufferUsageFlags::VERTEX_BUFFER, 2 * std::mem::size_of::<[f32; 16]>())?;
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{
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let mut map = buffer.map()?;
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unsafe {
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map.copy_from(0, bytemuck::cast_slice(VBO_OFFSCREEN));
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map.copy_from(std::mem::size_of::<[f32; 16]>(), bytemuck::cast_slice(VBO_DEFAULT_FINAL));
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}
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}
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Ok(DrawQuad {
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buffer,
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device: device.clone()
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})
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}
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pub fn bind_vbo(&self, cmd: &vk::CommandBuffer, vbo: VboType) {
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let offset = match vbo {
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VboType::Offscreen => 0,
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VboType::Final => std::mem::size_of::<[f32; 16]>()
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};
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unsafe {
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self.device.cmd_bind_vertex_buffers(*cmd, 0, &[self.buffer.handle], &[offset as vk::DeviceSize])
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}
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}
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}
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