GLASM is a small OpenGL demo written in x64 NASM assembly: open a window with GLFW, handle resizes and keyboard input, and draw a colored triangle, with no C in between.
It doubles as teaching material. A reusable macro library keeps the boilerplate down and the code readable, and the notes on NASM struc cover how the data layout is mapped.
Features
- GLFW window management, resize handling and keyboard controls
- Colored triangle rendered through OpenGL
- Macro library that cuts calling-convention boilerplate
- Cross-platform Makefile build (macOS tested; Linux and Windows untested)
Tech
- NASM 2.15+ for the assembly
- GCC as the linker
- GLFW and OpenGL
What I learned
- Calling C libraries from assembly: calling conventions, stack alignment and shadow space.
- Using
struc to keep memory layout explicit and readable.
Links
