ic
/
magnum
mirror of https://github.com/mosra/magnum.git
6
0
Fork 0
Code Issues Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
4625 Commits
21 Branches
19 Tags
70 MiB
Tree: 3e81fbad41
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '3e81fbad41'
${ noResults }
magnum/src/MagnumExternal/OpenGL/GLES3/README.md

21 lines
767 B
Raw Normal View History Unescape

Use flextGL also for OpenGL ES. Currently just regenerated the stock headers using flextGL, reducing line count a bit. No dynamic extension loading or function pointers yet, trying to make as little changes as possible.
12 years ago
OpenGL header and extension loader is generated using flextGL, get it at
[](https://github.com/ginkgo/flextGL).
See [](extensions.txt) for requested version and a list of non-core extensions.
Call `flextGLgen.py` in this directory with the following arguments:
.../flextGLgen.py -D . -t . extensions.txt
iOS-specific function pointer loader. It seems that there is no such thing as eglGetProcAddress() and thus we are able to use only functions that are defined in the ES[23]/glext.h header and no others. So, currently, the function loader internally undefs all function name macros that were defined in our flextgl.h header, then includes the Apple's glext.h header and assigns function pointers of those extensions that are defined in the header. Apple also has some minor differences in function signatures (different constness of pointer-to-pointer variables) so I had to reinterpret_cast everything. Might seem to be uglier than including glext.h directly in our code, but I made bad experience when doing so -- I want to depend on my header bugs that are consistent across all platforms instead of depending on whatever changes Apple makes in its headers. I also want to have all functions defined and not only those that are supported on iOS. Phew. Thank you, flextGL, for making it way easier than it appeared to be at first.
10 years ago
It will generate `flextGL.h`, `flextGL.cpp`, `flextGLPlatform.cpp` and
`flextGLPlatformIOS.cpp` files.
Initial support for WebGL 2. The actual WebGL 2 distinction was done as a part of previous WebGL cleanup. It compiles, but is completely broken, as Emscripten has some missing bits to go through at least Context class creation.
11 years ago
Emscripten doesn't have the ability to manually load extension pointers,
thus it has only header files:
.../flextGLgen.py -D . -t Emscripten/ Emscripten/extensions.txt
This will generate stripped-down `flextGLEmscripten.h` file.
As usual, be sure to check the diff for suspicious changes and
whitespace-at-EOL (although there shouldn't be any).