| Achievement | Engine/Game | Why it's bad |
|---|---|---|
| storing world space positions in gbuffer | STALKER, F.E.A.R. | Depth buffer can be used to derive position saving a lot of memory bandwidth |
| uploaded texture upside down | Various engines, mostly Quake derived. | Difficult to debug with tools like apitrace, nsight, pix, renderdoc, etc |
Dmytro Ivanov jimon
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| // ---- loading a font | |
| static void load_font(void) | |
| { | |
| hb_blob_t *blob; | |
| hb_face_t *face; | |
| size_t filelen = 0; | |
| void *filedata = stb_file("c:/windows/fonts/arial.ttf", &filelen); | |
| if (filedata == 0) stbpg_fatal("Couldn't load font"); |
rygorous
/ gist:e0f055bfb74e3d5f0af20690759de5a7
Created
May 8, 2016 06:54
A bit of background on compilers exploiting signed overflow
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| Why do compilers even bother with exploiting undefinedness signed overflow? And what are those | |
| mysterious cases where it helps? | |
| A lot of people (myself included) are against transforms that aggressively exploit undefined behavior, but | |
| I think it's useful to know what compiler writers are accomplishing by this. | |
| TL;DR: C doesn't work very well if int!=register width, but (for backwards compat) int is 32-bit on all | |
| major 64-bit targets, and this causes quite hairy problems for code generation and optimization in some | |
| fairly common cases. The signed overflow UB exploitation is an attempt to work around this. |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Reglike</title> | |
| <style> | |
| *, *::before, *::after { | |
| margin: 0; | |
| padding: 0; | |
| box-sizing: border-box; | |
| } |
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| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| int addi(int a, int b) { | |
| return a + b; | |
| } | |
| char *adds(char *a, char *b) { | |
| char *res = malloc(strlen(a) + strlen(b) + 1); |
staltz
/ introrx.md
Last active
March 10, 2026 03:48
The introduction to Reactive Programming you've been missing
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
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| ;SMBDIS.ASM - A COMPREHENSIVE SUPER MARIO BROS. DISASSEMBLY | |
| ;by doppelganger (doppelheathen@gmail.com) | |
| ;This file is provided for your own use as-is. It will require the character rom data | |
| ;and an iNES file header to get it to work. | |
| ;There are so many people I have to thank for this, that taking all the credit for | |
| ;myself would be an unforgivable act of arrogance. Without their help this would | |
| ;probably not be possible. So I thank all the peeps in the nesdev scene whose insight into | |
| ;the 6502 and the NES helped me learn how it works (you guys know who you are, there's no |