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Render target
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+311
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‎Cargo.lock

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‎lesson-25-x-terrain/Cargo.toml

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@@ -6,6 +6,9 @@ edition = "2018"
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[dependencies]
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resources = { path = "../lib/resources", features = ["backend_filesystem_watch"] }
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winput = { path = "../lib/winput" }
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lesson_25_x_render_gl = { path = "render_gl" }
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lesson_25_x_render_gl_derive = { path = "render_gl_derive" }
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gl = { path = "../lib/gl" }
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failure = "0.1.3"
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env_logger = "*"

‎lesson-25-x-terrain/render_gl/Cargo.toml

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[package]
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name = "lesson_25_x_render_gl"
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version = "0.1.0"
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authors = []
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edition = "2018"
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[dependencies]
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gl = { path = "../../lib/gl" }
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resources = { path = "../../lib/resources" }
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lesson_25_x_render_gl_derive = { path = "../render_gl_derive" }
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half = "1.1.1"
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vec-2-10-10-10 = "0.1.2"
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nalgebra = "0.16"
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ncollide3d = "0.17"
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failure = "0.1.3"
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font-kit = { version = "0.1.0" }
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euclid = "0.18.2"
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image = "0.20.1"
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lyon_tessellation = "0.11.0"
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lyon_path = "0.11.0"
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int_hash = "0.1.1"
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slotmap = "0.3"
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log = "0.4.6"
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floating-duration = "0.1.2"

‎lesson-25-x-terrain/render_gl/src/lib.rs

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#[macro_use] extern crate failure;
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pub mod render_target;

‎lesson-25-x-terrain/render_gl/src/render_target.rs

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use nalgebra as na;
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use failure;
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use gl;
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use gl::types::*;
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#[derive(Debug, Fail)]
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pub enum Error {
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#[fail(display = "Render target creation failed. The framebuffer was not complete.")]
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TheFramebufferWasNotComplete,
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}
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pub struct DefaultRenderTarget {
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size: na::Vector2<i32>,
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gl: gl::Gl,
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}
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impl DefaultRenderTarget {
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pub fn new(gl: &gl::Gl, size: na::Vector2<i32>) -> DefaultRenderTarget {
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DefaultRenderTarget {
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size,
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gl: gl.clone(),
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}
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}
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pub fn bind(&self) {
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unsafe {
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self.gl.BindFramebuffer(gl::FRAMEBUFFER, 0);
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}
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}
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}
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pub struct FramebufferTarget {
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size: na::Vector2<i32>,
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fb: GLuint,
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tex: GLuint,
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gl: gl::Gl,
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}
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impl FramebufferTarget {
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pub fn new(gl: &gl::Gl, size: na::Vector2<i32>) -> Result<FramebufferTarget, Error> {
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let mut tex = 0;
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let mut fb = 0;
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unsafe {
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gl.GenFramebuffers(1, &mut fb);
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gl.BindFramebuffer(gl::FRAMEBUFFER, fb);
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gl.GenTextures(1, &mut tex);
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gl.BindTexture(gl::TEXTURE_2D, tex);
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gl.TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MAG_FILTER, gl::NEAREST as i32);
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gl.TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MIN_FILTER, gl::NEAREST as i32);
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gl.FramebufferTexture(gl::FRAMEBUFFER, gl::COLOR_ATTACHMENT0, tex, 0);
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gl.TexImage2D(gl::TEXTURE_2D, 0, gl::RGBA as i32, size.x, size.y, 0, gl::RGBA, gl::UNSIGNED_BYTE, std::ptr::null());
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let complete = gl.CheckFramebufferStatus(gl::FRAMEBUFFER);
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gl.BindFramebuffer(gl::FRAMEBUFFER, 0);
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gl.BindTexture(gl::TEXTURE_2D, 0);
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if complete != gl::FRAMEBUFFER_COMPLETE {
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return Err(Error::TheFramebufferWasNotComplete);
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}
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}
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Ok(FramebufferTarget {
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size,
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fb,
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tex,
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gl: gl.clone(),
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})
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}
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pub fn bind(&self) {
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unsafe {
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self.gl.BindFramebuffer(gl::FRAMEBUFFER, self.fb);
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}
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}
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}
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impl Drop for FramebufferTarget
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{
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fn drop(&mut self){
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unsafe{
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self.gl.DeleteFramebuffers(1, &self.fb);
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self.gl.DeleteTextures(1, &self.tex);
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}
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}
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}

‎lesson-25-x-terrain/render_gl_derive/Cargo.toml

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[package]
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name = "lesson_25_x_render_gl_derive"
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version = "0.1.0"
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authors = []
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[dependencies]
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quote = "0.3.15"
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syn = "0.11.11"
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[lib]
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proc-macro = true

‎lesson-25-x-terrain/render_gl_derive/src/lib.rs

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#![recursion_limit = "128"]
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extern crate proc_macro;
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extern crate syn;
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#[macro_use]
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extern crate quote;
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#[proc_macro_derive(VertexAttribPointers, attributes(location, divisor))]
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pub fn vertex_attrib_pointers_derive(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
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let s = input.to_string();
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let ast = syn::parse_derive_input(&s).unwrap();
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let gen = generate_impl(&ast);
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gen.parse().unwrap()
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}
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fn generate_impl(ast: &syn::DeriveInput) -> quote::Tokens {
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let ident = &ast.ident;
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let generics = &ast.generics;
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let where_clause = &ast.generics.where_clause;
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let fields_vertex_attrib_pointer = generate_vertex_attrib_pointer_calls(&ast.body);
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quote!{
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impl #ident #generics #where_clause {
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#[allow(unused_variables)]
25+
pub fn vertex_attrib_pointers(gl: &::gl::Gl) {
26+
let stride = ::std::mem::size_of::<Self>();
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let offset = 0;
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29+
#(#fields_vertex_attrib_pointer)*
30+
}
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}
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}
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}
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fn generate_vertex_attrib_pointer_calls(body: &syn::Body) -> Vec<quote::Tokens> {
36+
match body {
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&syn::Body::Enum(_) => panic!("VertexAttribPointers can not be implemented for enums"),
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&syn::Body::Struct(syn::VariantData::Unit) => {
39+
panic!("VertexAttribPointers can not be implemented for Unit structs")
40+
}
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&syn::Body::Struct(syn::VariantData::Tuple(_)) => {
42+
panic!("VertexAttribPointers can not be implemented for Tuple structs")
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}
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&syn::Body::Struct(syn::VariantData::Struct(ref s)) => s
45+
.iter()
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.map(generate_struct_field_vertex_attrib_pointer_call)
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.collect(),
48+
}
49+
}
50+
51+
fn generate_struct_field_vertex_attrib_pointer_call(field: &syn::Field) -> quote::Tokens {
52+
let field_name = match field.ident {
53+
Some(ref i) => format!("{}", i),
54+
None => String::from(""),
55+
};
56+
let field_ty = &field.ty;
57+
58+
if let Some(location_attr) = field
59+
.attrs
60+
.iter()
61+
.filter(|a| a.value.name() == "location")
62+
.next()
63+
{
64+
let location_value: usize = match location_attr.value {
65+
syn::MetaItem::NameValue(_, syn::Lit::Str(ref s, _)) => {
66+
s.parse().unwrap_or_else(|_| {
67+
panic!(
68+
"Field {} location attribute value must contain an integer",
69+
field_name
70+
)
71+
})
72+
}
73+
_ => panic!(
74+
"Field {} location attribute value must be a string literal",
75+
field_name
76+
),
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};
78+
79+
let divisor_call = match field
80+
.attrs
81+
.iter()
82+
.filter(|a| a.value.name() == "divisor")
83+
.next()
84+
{
85+
Some(attr) => {
86+
let divisor_value: u32 = match attr.value {
87+
syn::MetaItem::NameValue(_, syn::Lit::Str(ref s, _)) => {
88+
s.parse().unwrap_or_else(|_| {
89+
panic!(
90+
"Field {} divisor attribute value must contain an integer",
91+
field_name
92+
)
93+
})
94+
}
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_ => panic!(
96+
"Field {} divisor attribute value must be a string literal",
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field_name
98+
),
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};
100+
101+
quote! {
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gl.VertexAttribDivisor(#location_value as u32, #divisor_value);
103+
}
104+
}
105+
None => quote!{},
106+
};
107+
108+
quote! {
109+
let location = #location_value;
110+
unsafe {
111+
#field_ty::vertex_attrib_pointer(gl, stride, location, offset);
112+
#divisor_call
113+
}
114+
let offset = offset + ::std::mem::size_of::<#field_ty>();
115+
}
116+
} else {
117+
quote! {
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let offset = offset + ::std::mem::size_of::<#field_ty>();
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}
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}
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}

‎lesson-25-x-terrain/src/main.rs

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@@ -3,6 +3,7 @@ use resources::{
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Resources,
44
backend::FileSystem
55
};
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use winput;
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78
mod debug;
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mod onion;

‎lib/resources/src/lib.rs

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@@ -246,8 +246,7 @@ mod test {
246246
}
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248248
#[test]
249-
fn writing_resource_should_produce_change_sync_point_and_other_resource_proxies_should_see_it_as_modified(
250-
) {
249+
fn writing_resource_should_produce_change_sync_point_and_other_resource_proxies_should_see_it_as_modified() {
251250
let res =
252251
Resources::new().loaded_from("a", 0, backend::InMemory::new().with("name", b"hello"));
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‎lib/winput/Cargo.toml

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[package]
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name = "winput"
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version = "0.1.0"
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authors = []
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edition = "2018"
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[dependencies]

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