* review texture formats
Added support for `R3G3B2`, `R5G6B5`, `R4G4B4A4` and `R5G5B5A1`
Added depth formats
* use of textures for the framebuffer
- Framebuffers can now use all texture types that are already available.
- The 24-bit depth format has been removed as it is no longer needed.
- Framebuffer formats are still defined at compile time.
- The allocated texture size is now preserved, which avoids frequent reallocations when resizing framebuffers and will allow the use of `glTexSubImage2D`.
* review framebuffer blit/copy
This greatly simplifies the framebuffer blit/copy logic while now supporting all pixel formats. It is slightly slower in debug builds, but this path is mainly kept for compatibility anyway. The `copy_fast` version is still used for the "normal" cases when presenting to the screen.
* review pixel get/set
less ops for certain formats + fixes
* fix depth write
* texture read/write cleanup + tweaks
I made the pointers parameters `restrict` for reading/writing textures, which resulted in a slight improvement.
And I reviewed the `static inline` statements, which could potentially bias the compiler; no difference, but it's cleaner.
* style tweaks
* review uint8_t <-> float conversion
* added a reusable object pool system
will allow management of both textures and framebuffers
added support for `glTexSubImage2D`
added handling of 'GL_OUT_OF_MEMORY' errors
removed the default internal texture (unused)
* added FBO API + refactored rasterizer dispatch logic
* fix ndc projection + review presentation
and rename rlsw's resize/copy/blit
* add `glRenderbufferStorage` binding
+ tweaks and fixes
* fix quad sorting + simplify quad rasterization part
* fix line shaking issue
* support of `GL_DRAW_FRAMEBUFFER_BINDING`
* update rlgl - support of rlsw's framebuffers
* fix pixel origin in line rasterization
my bad, an oversight in my previous fix.
This offset should have been moved here rather than per pixel during truncation.
* style tweaks
* fix vla issue with msvc - fill depth / fill color
e7d999e3c7