DavidEGrayson

diff --git a/code/15_hello_triangle.cpp b/code/15_hello_triangle.cpp
index 532520e..31f2bd7 100644
--- a/code/15_hello_triangle.cpp
+++ b/code/15_hello_triangle.cpp
@@ -642,12 +642,15 @@ private:

     void drawFrame() {
         vkWaitForFences(device, 1, &inFlightFences[currentFrame], VK_TRUE, UINT64_MAX);
+        VkFence waited = inFlightFences[currentFrame];

DavidEGrayson

// Compile with: gcc -g bad.c -lvulkan -lgdi32 -lglfw3

#define VK_USE_PLATFORM_WIN32_KHR
#include <vulkan/vulkan.h>
#define GLFW_EXPOSE_NATIVE_WIN32
#include <GLFW/glfw3.h>
#include <GLFW/glfw3native.h>

#include <string.h>
#include <stdlib.h>

DavidEGrayson

# Reduce file size.  Might need '-vcodec libx264' in some cases?
ffmpeg -i foo.mp4 -crf 28 foo_out.mp4

# Reduce file size, rescale to 1080p, and crop in time and space.
ffmpeg -i foo.mp4 -crf 28 -ss 00:00:25 -to 00:01:15 -vf "scale=1920:-1,crop=1920:800:0:1900" foo_out.mp4

# Reduce file size, crop a video in time and scale it to 1080p
ffmpeg -i foo.mp4 -crf 28 -ss 00:01:00 -to 00:00:10 -vf scale=1920:-1 output.mp4

ffprobe foo.mp4   # Make sure the audio stream is aac.

DavidEGrayson

Building a mingw-w64 GCC cross-compiler with nixcrpkgs: instructions for Terry, October 2018

1. Install Nix, the functional package manager. You'll need Linux (but macOS might work too).
2. Make sure you have at least 4 GB of free space available for /tmp and a few GB of free space available for /nix.
3. To get my recipes, run: git clone https://github.com/DavidEGrayson/nixcrpkgs && cd nixcrpkgs && git checkout 4f7b11d That commit is the current tip of the dev/david/2019 branch.
4. To build a i686-w64-mingw32 C/C++ cross-compiling toolchain and a hello world program, run: nix-build -A win32.hello
5. To build Qt and its examples, run: nix-build -A win32.qt.examples
6. To just build the toolchain itself, run: nix-build -A win32.gcc

DavidEGrayson

[root@alderaan gradual]# pacman -Sy archlinux-keyring
:: Synchronizing package databases...
 core is up to date
 extra is up to date
 community is up to date
warning: archlinux-keyring-20180108-1 is up to date -- reinstalling
resolving dependencies...
looking for conflicting packages...

Packages (1) archlinux-keyring-20180108-1

DavidEGrayson

$ clang-format --version
clang-format version 5.0.0 (tags/RELEASE_500/final)

$ cat .clang-format 
AllowShortBlocksOnASingleLine: true

$ cat test.cpp
int foo(int x)
{
  if (x == 0) { return 1; }

DavidEGrayson

$ cat somefile.h
struct a;

struct a *init();
void setd(struct a*p, int dd);
int getd(struct a*p);
void cleanup(struct a*p);


$ cat somefile.c

DavidEGrayson

$ cat test.sh
#!/bin/sh

for a in 0; do
    echo b=$(echo "c-d" | tr - _)
done

$ . test.sh
b=c_d

DavidEGrayson

$ cat test.c
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char ** argv)
{
    for(int i = 0; i < argc; i ++)
    {
        printf("%d = %s\n", i, argv[i]);
    }

DavidEGrayson

$ cat /dev/bus/usb/001/002 | head -c18 | hexdump
0000000 0112 0110 0000 0800 80ee 0021 0100 0301
0000010 0100                                   
0000012
$ lsusb
Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub