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#![deny(unsafe_code)]
use crate::error::*;
use crate::graphics::Render;
use vulkanalia::Device;
use vulkanalia::vk::{ self, HasBuilder, DeviceV1_0 };
#[allow(unsafe_code)]
pub fn generate_scene_commands<'a>(image_index: usize, time: f32,
render: &'a Render,
device: &Device, extent: &vk::Extent2D)
-> Result<&'a vk::CommandBuffer>
{
let frame = &render.per_frame[image_index];
let command_buffer = &frame.command_buffer;
let framebuffer = &frame.framebuffer;
let descriptor_set = &frame.descriptor_set;
let inheritance_info = vk::CommandBufferInheritanceInfo::builder();
let command_buffer_begin_info = vk::CommandBufferBeginInfo::builder()
.flags(vk::CommandBufferUsageFlags::empty())
.inheritance_info(&inheritance_info);
unsafe {
device.begin_command_buffer(*command_buffer, &command_buffer_begin_info)
}?;
let render_area = vk::Rect2D::builder()
.offset(vk::Offset2D::default())
.extent(*extent);
let color_clear_value = vk::ClearValue {
color: vk::ClearColorValue {
float32: [0.0, 0.0, 0.0, 1.0]
}
};
let depth_clear_value = vk::ClearValue {
depth_stencil: vk::ClearDepthStencilValue {
depth: 1.0,
stencil: 0,
}
};
let clear_values = [color_clear_value, depth_clear_value];
let begin_pass_info = vk::RenderPassBeginInfo::builder()
.render_pass(render.render_pass)
.framebuffer(*framebuffer)
.render_area(render_area)
.clear_values(&clear_values);
unsafe {
device.cmd_begin_render_pass(*command_buffer, &begin_pass_info,
vk::SubpassContents::INLINE)
};
unsafe {
device.cmd_bind_pipeline(*command_buffer,
vk::PipelineBindPoint::GRAPHICS,
render.pipeline)
};
// Please notice the magic constant 0. This is a zero-based index into
// the array of descriptor set layouts passed to create_pipeline_layout()
// in init_pipeline() in render.rs.
unsafe {
device.cmd_bind_descriptor_sets(*command_buffer,
vk::PipelineBindPoint::GRAPHICS,
render.pipeline_layout,
0,
&[*descriptor_set],
&[])
};
if let Some(texture) = &render.texture {
texture.make_active(device, render, command_buffer);
}
if let Some(model) = &render.model {
model.render(time, device, render, command_buffer);
}
unsafe { device.cmd_end_render_pass(*command_buffer) };
unsafe { device.end_command_buffer(*command_buffer) }?;
Ok(command_buffer)
}
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