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extern crate nuklear_rust;
#[macro_use]
extern crate gfx;
use nuklear_rust::{NkHandle, NkContext, NkConvertConfig, NkVec2, NkBuffer, NkDrawVertexLayoutElements, NkDrawVertexLayoutAttribute, NkDrawVertexLayoutFormat};
use gfx::{Factory, Resources, Encoder};
use gfx::tex::{Kind, AaMode};
use gfx::format::{R8_G8_B8_A8, Unorm, U8Norm};
use gfx::handle::{ShaderResourceView, RenderTargetView, Sampler, Buffer};
use gfx::traits::FactoryExt;
type DepthFormat = gfx::format::DepthStencil;
pub type ColorFormat = gfx::format::Rgba8;
gfx_defines!{
vertex Vertex {
pos: [f32; 2] = "Position",
tex: [f32; 2] = "TexCoord",
col: [U8Norm; 4] = "Color",
}
pipeline pipe {
vbuf: gfx::VertexBuffer<Vertex> = (),
proj: gfx::Global<[[f32; 4]; 4]> = "ProjMtx",
tex: gfx::TextureSampler<[f32; 4]> = "Texture",
output: gfx::BlendTarget<super::ColorFormat> = ("Out_Color", gfx::state::MASK_ALL, gfx::preset::blend::ALPHA),
scissors: gfx::Scissor = (),
}
}
impl Default for Vertex {
fn default() -> Self {
unsafe { ::std::mem::zeroed() }
}
}
pub struct Drawer<R: Resources> {
cmd: NkBuffer,
pso: gfx::PipelineState<R, pipe::Meta>,
col: RenderTargetView<R, (R8_G8_B8_A8, Unorm)>,
smp: Sampler<R>,
tex: Vec<ShaderResourceView<R, [f32; 4]>>,
vbf: Buffer<R, Vertex>,
ebf: Buffer<R, u16>,
vsz: usize,
esz: usize,
vle: NkDrawVertexLayoutElements,
}
impl<R: gfx::Resources> Drawer<R> {
pub fn new<F>(factory: &mut F, col: &RenderTargetView<R, (R8_G8_B8_A8, Unorm)>, texture_count: usize, vbo_size: usize, ebo_size: usize, command_buffer: NkBuffer) -> Drawer<R>
where F: Factory<R>
{
use gfx::pso::buffer::Structure;
Drawer {
cmd: command_buffer,
col: col.clone(),
smp: factory.create_sampler_linear(),
pso: factory.create_pipeline_simple(include_bytes!("../shaders/glsl_150/vs.glsl"),
include_bytes!("../shaders/glsl_150/fs.glsl"),
pipe::new())
.unwrap(),
tex: Vec::with_capacity(texture_count + 1),
vbf: factory.create_buffer_dynamic::<Vertex>(vbo_size, ::gfx::BufferRole::Vertex, ::gfx::Bind::empty()).unwrap(),
ebf: factory.create_buffer_dynamic::<u16>(ebo_size, ::gfx::BufferRole::Index, ::gfx::Bind::empty()).unwrap(),
vsz: vbo_size,
esz: ebo_size,
vle: NkDrawVertexLayoutElements::new(&[(NkDrawVertexLayoutAttribute::NK_VERTEX_POSITION, NkDrawVertexLayoutFormat::NK_FORMAT_FLOAT, Vertex::query("Position").unwrap().offset),
(NkDrawVertexLayoutAttribute::NK_VERTEX_TEXCOORD, NkDrawVertexLayoutFormat::NK_FORMAT_FLOAT, Vertex::query("TexCoord").unwrap().offset),
(NkDrawVertexLayoutAttribute::NK_VERTEX_COLOR, NkDrawVertexLayoutFormat::NK_FORMAT_R8G8B8A8, Vertex::query("Color").unwrap().offset),
(NkDrawVertexLayoutAttribute::NK_VERTEX_ATTRIBUTE_COUNT, NkDrawVertexLayoutFormat::NK_FORMAT_COUNT, 0u32)]),
}
}
pub fn add_texture<F>(&mut self, factory: &mut F, image: &[u8], width: u32, height: u32) -> NkHandle
where F: Factory<R>
{
let (_, view) = factory.create_texture_const_u8::<ColorFormat>(Kind::D2(width as u16, height as u16, AaMode::Single),
&[image])
.unwrap();
self.tex.push(view);
NkHandle::from_id(self.tex.len() as i32)
}
pub fn draw<F, B: gfx::CommandBuffer<R>>(&mut self, ctx: &mut NkContext, cfg: &mut NkConvertConfig, encoder: &mut Encoder<R, B>, factory: &mut F, tmp: &mut [u16], width: u32, height: u32, scale: NkVec2)
where F: Factory<R>
{
use gfx::IntoIndexBuffer;
let ortho = [[2.0f32 / width as f32, 0.0f32, 0.0f32, 0.0f32], [0.0f32, -2.0f32 / height as f32, 0.0f32, 0.0f32], [0.0f32, 0.0f32, -1.0f32, 0.0f32], [-1.0f32, 1.0f32, 0.0f32, 1.0f32]];
cfg.set_vertex_layout(&self.vle);
cfg.set_vertex_size(::std::mem::size_of::<Vertex>());
{
let mut rwv = factory.map_buffer_rw(&mut self.vbf);
let mut rvbuf = unsafe {
::std::slice::from_raw_parts_mut(&mut *rwv as *mut [Vertex] as *mut u8,
::std::mem::size_of::<Vertex>() * self.vsz)
};
let mut vbuf = NkBuffer::with_fixed(&mut rvbuf);
let mut rebuf = unsafe {
::std::slice::from_raw_parts_mut(tmp as *mut [u16] as *mut u8,
::std::mem::size_of::<u16>() * self.esz)
};
let mut ebuf = NkBuffer::with_fixed(&mut rebuf);
ctx.convert(&mut self.cmd, &mut vbuf, &mut ebuf, cfg);
}
{
let mut rwe = factory.map_buffer_rw(&mut self.ebf);
(&mut *rwe).clone_from_slice(tmp);
}
let mut slice = ::gfx::Slice {
start: 0,
end: 0,
base_vertex: 0,
instances: None,
buffer: self.ebf.clone().into_index_buffer(factory),
};
for cmd in ctx.draw_command_iterator(&self.cmd) {
if cmd.elem_count() < 1 {
continue;
}
slice.end = slice.start + cmd.elem_count();
let id = cmd.texture().id().unwrap();
let x = cmd.clip_rect().x * scale.x;
let y = (height as f32 - (cmd.clip_rect().y + cmd.clip_rect().h)) * scale.y;
let w = cmd.clip_rect().w * scale.x;
let h = cmd.clip_rect().h * scale.y;
let sc_rect = gfx::Rect {
x: (if x < 0f32 { 0f32 } else { x }) as u16,
y: (if y < 0f32 { 0f32 } else { y }) as u16,
w: (if x < 0f32 { w + x } else { w }) as u16,
h: (if y < 0f32 { h + y } else { h }) as u16,
};
let res = self.find_res(id).unwrap();
let data = pipe::Data {
vbuf: self.vbf.clone(),
proj: ortho,
tex: (res, self.smp.clone()),
output: self.col.clone(),
scissors: sc_rect,
};
encoder.draw(&slice, &self.pso, &data);
slice.start = slice.end;
}
}
fn find_res(&self, id: i32) -> Option<ShaderResourceView<R, [f32; 4]>> {
let mut ret = None;
if id > 0 && id as usize <= self.tex.len() {
ret = Some(self.tex[(id - 1) as usize].clone());
}
ret
}
}