refactored to use util::read_spv

examples/Cargo.toml

@@ -7,7 +7,6 @@ authors = ["maik klein <maikklein@googlemail.com>"]
 winit = "0.16"
 image = "0.10.4"
 ash = { path = "../ash" }
-byteorder = "1.2.7"
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3.4", features = ["windef", "winuser"] }

examples/src/bin/texture.rs

@@ -5,11 +5,9 @@ extern crate image;
 use std::default::Default;
 use std::ffi::CString;
 use std::fs::File;
-use std::io::Read;
 use std::mem::{self, align_of};
 use std::os::raw::c_void;
 use std::path::Path;
-use std::ptr;
 
 use ash::util::*;
 use ash::vk;
@@ -548,20 +546,15 @@ fn main() {
         ];
         base.device.update_descriptor_sets(&write_desc_sets, &[]);
 
-        let vertex_spv_file =
+        let mut vertex_spv_file =
             File::open(Path::new("shader/texture/vert.spv")).expect("Could not find vert.spv.");
-        let frag_spv_file =
+        let mut frag_spv_file =
             File::open(Path::new("shader/texture/frag.spv")).expect("Could not find frag.spv.");
 
-        let vertex_bytes: Vec<u8> = vertex_spv_file
-            .bytes()
-            .filter_map(|byte| byte.ok())
-            .collect();
-        let vertex_code = bytes_to_u32_vec(&vertex_bytes);
+        let vertex_code = read_spv(&mut vertex_spv_file).expect("Failed to read vertex shader spv file");
         let vertex_shader_info = vk::ShaderModuleCreateInfo::builder().code(&vertex_code);
 
-        let frag_bytes: Vec<u8> = frag_spv_file.bytes().filter_map(|byte| byte.ok()).collect();
-        let frag_code = bytes_to_u32_vec(&frag_bytes);
+        let frag_code = read_spv(&mut frag_spv_file).expect("Failed to read fragment shader spv file");
         let frag_shader_info = vk::ShaderModuleCreateInfo::builder().code(&frag_code);
 
         let vertex_shader_module = base

examples/src/bin/triangle.rs

@@ -7,11 +7,9 @@ use examples::*;
 use std::default::Default;
 use std::ffi::CString;
 use std::fs::File;
-use std::io::Read;
 use std::mem;
 use std::mem::align_of;
 use std::path::Path;
-use std::ptr;
 
 #[derive(Clone, Debug, Copy)]
 struct Vertex {
@@ -204,23 +202,17 @@ fn main() {
         base.device
             .bind_buffer_memory(vertex_input_buffer, vertex_input_buffer_memory, 0)
             .unwrap();
-        let vertex_spv_file =
+        let mut vertex_spv_file =
             File::open(Path::new("shader/triangle/vert.spv")).expect("Could not find vert.spv.");
-        let frag_spv_file =
+        let mut frag_spv_file =
             File::open(Path::new("shader/triangle/frag.spv")).expect("Could not find frag.spv.");
 
-        let vertex_bytes: Vec<u8> = vertex_spv_file
-            .bytes()
-            .filter_map(|byte| byte.ok())
-            .collect();
-
-        let vertex_code = bytes_to_u32_vec(&vertex_bytes);
-
+        let vertex_code = read_spv(&mut vertex_spv_file).expect("Failed to read vertex shader spv file");
         let vertex_shader_info = vk::ShaderModuleCreateInfo::builder().code(&vertex_code);
 
-        let frag_bytes: Vec<u8> = frag_spv_file.bytes().filter_map(|byte| byte.ok()).collect();
-        let frag_code = bytes_to_u32_vec(&frag_bytes);
+        let frag_code = read_spv(&mut frag_spv_file).expect("Failed to read fragment shader spv file");
         let frag_shader_info = vk::ShaderModuleCreateInfo::builder().code(&frag_code);
+
         let vertex_shader_module = base
             .device
             .create_shader_module(&vertex_shader_info, None)

examples/src/lib.rs

@@ -1,6 +1,5 @@
 #[macro_use]
 extern crate ash;
-extern crate byteorder;
 #[cfg(target_os = "windows")]
 extern crate winapi;
 
@@ -36,47 +35,13 @@ use ash::extensions::khr::Win32Surface;
 use ash::extensions::mvk::MacOSSurface;
 pub use ash::version::{DeviceV1_0, EntryV1_0, InstanceV1_0};
 use ash::{vk, Device, Entry, Instance};
-use byteorder::{BigEndian, LittleEndian, ReadBytesExt};
 use std::cell::RefCell;
 use std::default::Default;
 use std::ffi::{CStr, CString};
-use std::io::Cursor;
 use std::ops::Drop;
 use std::os::raw::{c_char, c_void};
 use std::ptr;
 
-
-const MAGIC_NUMBER: u32 = 0x07230203;
-
-fn spirv_is_little_endian(bytes: &[u8]) -> bool {
-    let buffer: [u8; 4] = [bytes[0], bytes[1], bytes[2], bytes[3]];
-    let number: u32 = Cursor::new(buffer).read_u32::<LittleEndian>().unwrap();
-    number == MAGIC_NUMBER
-}
-
-pub fn bytes_to_u32_vec(bytes: &[u8]) -> Vec<u32> {
-    let mut output = vec![];
-    let mut buffer: [u8; 4] = [0, 0, 0, 0];
-    let is_little_endian = spirv_is_little_endian(bytes);
-    for (i, b) in bytes.iter().enumerate() {
-        let idx = i % 4;
-        buffer[idx] = *b;
-        if idx == 3 {
-            let new_word = if is_little_endian {
-                Cursor::new(buffer).read_u32::<LittleEndian>().unwrap()
-            } else {
-                Cursor::new(buffer).read_u32::<BigEndian>().unwrap()
-            };
-            output.push(new_word);
-            buffer = [0, 0, 0, 0];
-        }
-    }
-    if bytes.len() % 4 != 0 {
-        output.push(Cursor::new(buffer).read_u32::<LittleEndian>().unwrap());
-    }
-    output
-}
-
 // Simple offset_of macro akin to C++ offsetof
 #[macro_export]
 macro_rules! offset_of {