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Carl Woffenden cwoffenden

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  • Numfum GmbH
  • Basel, Switzerland
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@slimbuck
slimbuck / webgpu_metal_capture.txt
Created May 13, 2024 08:47
Capturing WebGPU metal trace on MacOS
1) Clone and build WebKit
git clone https://github.com/WebKit/WebKit.git WebKit
cd WebKit
Tools/Scripts/build-webkit -cmakeargs="-DENABLE_WEBGPU_BY_DEFAULT=1" --debug
2) Run your app
__XPC_METAL_CAPTURE_ENABLED=1 Tools/Scripts/run-minibrowser --debug --url http://localhost:5000/index.html#/loaders/gsplat
@d7samurai
d7samurai / .readme.md
Last active October 20, 2025 09:24
Minimal D3D11 bonus material: extra minimal triangle

Minimal D3D11 bonus material: extra minimal triangle

A quick side exercise to see how little code one can get away with to put that RGB triangle on screen using D3D11 (without bending over backwards with trickery). This is a complete app in < 40 LOC (including the HLSL).

pretty minimal d3d11 triangle

For more.. elaborate.. D3D11 reference code, see the original Minimal D3D11, Minimal D3D11 pt2 and Minimal D3D11 pt3

@rygorous
rygorous / gist:5c815b74e8428fe9ab1e75495c59a9ce
Created September 6, 2022 18:21
FP state scope guard
// Scope guard to set up FP state as desired and reset it on exit
struct FPStateScope
{
U32 saved_state;
FPStateScope();
~FPStateScope();
};
// ...
@slembcke
slembcke / frame-timing.c
Last active June 18, 2023 19:05
Filter frame timing to try and remove scheduler jitter.
double delta_time_filtered(double dt_nanos){
// Warm start the filter by assuming 60 Hz.
static double x[] = {1.6e7, 1.6e7, 1.6e7}, y[] = {1.6e7, 1.6e7, 1.6e7};
// IIR filter coefficients. 2rd order lowpass butterworth at 1/128 the sample rate.
static const double b[] = {6.321391700454014e-5, 0.00012642783400908025, 6.321391700454014e-5};
static const double a[] = {1.0, -1.9681971279272976, 0.9684499835953156};
// Apply IIR filter coefficients.
double value = b[0]*dt_nanos;
for(uint i = 2; i > 0; i--){
@JarkkoPFC
JarkkoPFC / morton.h
Created September 30, 2021 06:19
Faster 16/32bit 2D Morton Code encode/decode functions
uint16_t encode16_morton2(uint8_t x_, uint8_t y_)
{
uint32_t res=x_|(uint32_t(y_)<<16);
res=(res|(res<<4))&0x0f0f0f0f;
res=(res|(res<<2))&0x33333333;
res=(res|(res<<1))&0x55555555;
return uint16_t(res|(res>>15));
}
//----
@GetVladimir
GetVladimir / Force-RGB-Color-on-M1-Mac.md
Last active December 8, 2025 14:30
Force RGB Color on M1 Mac

Force RGB Color on M1 Mac

How to Force RGB Color Output instead of YPbPr on your M1 Apple Silicon Mac for an External Monitor.

This step-by-step video tutorial will guide you through the procedure of forcing RGB color output on your M1 Mac.

Force RGB Color on M1 Mac

Here is the direct link to the video tutorial: https://www.youtube.com/watch?v=Z1EqH3fd0V4

The video also has Closed Captions (Subtitles) that you can enable, to make it easier to follow if needed.

@Popov72
Popov72 / using_pix_with_canary.md
Last active April 12, 2025 19:25
Using PIX with Chrome

In PIX, Select Target Process => Launch Win32 and set the following 2 entries according to where Canary / Chrome is installed:

  • Path to executable: "C:\Users\alexis\AppData\Local\Google\Chrome SxS\Application\chrome.exe"
  • Working directory: "C:\Users\alexis\AppData\Local\Google\Chrome SxS\Application"
  • Command line arguments: --disable-gpu-sandbox --disable-direct-composition
    • You can add those arguments if you want to be able to see the disassembled shader code: --enable-dawn-features=emit_hlsl_debug_symbols,disable_symbol_renaming
  • Launch Suspended unchecked, Launch for GPU capture and Force D3D11On12 checked

Then click on "Launch".

Important: you should close all your Canary / Chrome windows/processes before clicking on the "Launch" button!

@castano
castano / perfect-quantization-dxt-endpoints.txt
Last active September 16, 2025 04:31
Perfect Quantization of DXT endpoints
-------------------------------------
One of the issues that affect the quality of most DXT compressors is the way floating point colors are rounded.
For example, stb_dxt does:
max16 = (unsigned short)(stb__sclamp((At1_r*yy - At2_r*xy)*frb+0.5f,0,31) << 11);
max16 |= (unsigned short)(stb__sclamp((At1_g*yy - At2_g*xy)*fg +0.5f,0,63) << 5);
max16 |= (unsigned short)(stb__sclamp((At1_b*yy - At2_b*xy)*frb+0.5f,0,31) << 0);
@joevt
joevt / EDIDUtil.sh
Last active May 20, 2025 02:48
A set of shell functions used to view and edit EDIDs.
#!/bin/bash
#!/bin/zsh
# by joevt May 24/2023
#=========================================================================================
edid_decode=edid-decode
#=========================================================================================
# Modify EDID
@perlguy99
perlguy99 / Xcode_Variables.txt
Created July 10, 2017 18:07
Xcode Environment variables
ACTION=build
AD_HOC_CODE_SIGNING_ALLOWED=NO
ALTERNATE_GROUP=staff
ALTERNATE_MODE=u+w,go-w,a+rX
ALTERNATE_OWNER=brent
ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES=NO
ALWAYS_SEARCH_USER_PATHS=NO
ALWAYS_USE_SEPARATE_HEADERMAPS=NO
APPLE_INTERNAL_DEVELOPER_DIR=/AppleInternal/Developer
APPLE_INTERNAL_DIR=/AppleInternal