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// Copyright 2016 GFX developers
//
// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
// http://opensource.org/licenses/MIT>, at your option. This file may not be
// copied, modified, or distributed except according to those terms.
use metal::*;
use objc::rc::autoreleasepool;
const PROGRAM: &'static str = "
#include <metal_stdlib>\n\
using namespace metal;\n\
typedef struct {\n\
float2 position;\n\
float3 color;\n\
} vertex_t;\n\
struct ColorInOut {\n\
float4 position [[position]];\n\
float4 color;\n\
};\n\
vertex ColorInOut vs(device vertex_t* vertex_array [[ buffer(0) ]],\n\
unsigned int vid [[ vertex_id ]])\n\
{\n\
ColorInOut out;\n\
out.position = float4(float2(vertex_array[vid].position), 0.0, 1.0);\n\
out.color = float4(float3(vertex_array[vid].color), 1.0);\n\
return out;\n\
}\n\
fragment float4 ps(ColorInOut in [[stage_in]])\n\
{\n\
return in.color;\n\
};\n\
";
fn main() {
autoreleasepool(|| {
let device = Device::system_default().expect("no device found");
let options = CompileOptions::new();
let library = device.new_library_with_source(PROGRAM, &options).unwrap();
let (vs, ps) = (
library.get_function("vs", None).unwrap(),
library.get_function("ps", None).unwrap(),
);
let vertex_desc = VertexDescriptor::new();
let desc = RenderPipelineDescriptor::new();
desc.set_vertex_function(Some(&vs));
desc.set_fragment_function(Some(&ps));
desc.set_vertex_descriptor(Some(vertex_desc));
println!("{:?}", desc);
let reflect_options = MTLPipelineOption::ArgumentInfo | MTLPipelineOption::BufferTypeInfo;
let (_, reflection) = device
.new_render_pipeline_state_with_reflection(&desc, reflect_options)
.unwrap();
println!("Vertex arguments: ");
let vertex_arguments = reflection.vertex_arguments();
for index in 0..vertex_arguments.count() {
let argument = vertex_arguments.object_at(index).unwrap();
println!("{:?}", argument);
}
});
}
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