This is a slighty revised version of id Software original code. Icculus
code may have some advantages on broken drivers or underpowered GPUs.
Today it's just a performance hook. This is a first step in fixing #147.
This is based on work submitted by Scott "pickle" Smith. It's said that
vertex arrays are somewhat faster and more compatible than the old way.
This may remove support of some very, very old GPUs like the Riva128.
This is more less cosmetics since gl_tex_solid_format == GL_RGB and
GL_LIGHTMAP_FORMAT == GL_RGBA. No measurable FPS change on Nvidia and
Intel. Based upon the OpenGL ES patch by Scott "pickle" Smith.
This is based upon the original OpenGL ES patch by Scott "pickle"
Smith. This change gives about the same frame rate on an 750TI but
about 3% more frames on an Ivy Bridge IGP with Mesa3D...
Hardware gamma is broken, especially in fullscreen, and a Mac user told me
that setting HW/screen gamma on OSX is a bad idea anyway, because it resets
the monitor calibration.
The game /should/ look ok with vid_gamma 1 (if your display is configured
properly), but if you think it's too dark set it a bit higher and do
vid_restart.
Multitexturing was enabled by default in 0f7b422. It gives a small but
on todays hardware neglectable performance boost, but caused several
problems over the years. For example gl_showtris doesn't work with it
and there's at least one render glitch in city3.bsp.
As Jack Whitham noticed [0], animated textures freeze at their first
frame if they're on a transparent surface. This can be seen in base3
(Com Centre), for example. At least for the OpenGL renderer this is
caused by the fact that the animation chain is never forwarded if the
texture is bound to a transparent surface. The fix is to do exactly
that...
I can only speculate why the animations on transparent surfaces were
never used / implemented. Maybe performance issues or it was just
forgotten.
0: http://blog.jwhitham.org/2015/04/more-fun-with-floating-point-numbers.html
Switching to fullscreen through a SDL2 call is nice, but the renderer
needs to be reinitialized. Without it some things will break, for
example the gamma setting.
Retexturing support is now always on (you can still switch it off with
the gl_retexturing CVAR), as we don't have the additional libjpeg
dependency anymore.
stb_image is used for tga, jpg and the newly supported png, so the
old tga and jpeg loading code has been removed.
I furthermore cleaned up the somehow messy and possibly slightly broken
retexturing selection code in R_FindImage()
Check and use GL_ARB_texture_non_power_of_two and use it if present to allow using all textures unscaled. This makes a huge visual improvement since most skins are not power-of-two textures.
Conflicts:
src/client/refresh/header/local.h
Without this define newer versions of jpeg define a type "bool" as char,
while the MinGW headers define it as "unsigned short". Automake should
have detected that, but...
The code used build fine on my workstation, since Mesa3D has the
required macros since ever. But on Windows gl.h is still limited
to OpenGL 1 (really?).
MSAA was a long wanted and often requested feature. Just set set the
desired number of samples with gl_msaa_samples and do a vid_restart.
This code is based upon work done in Hecatomb.
Makefile is adjusted, it compiles and works mostly, but
* For some reason (bug in SDL_GetRelativeMouseState() ?)
mouse input doesn't work properly.. it seems to be bound
to window borders, even if input is grabbed
* some keys can't be used anymore because there's no SDLK_*
for them anymore (gotta find out if this is important)
* Maybe some of the changes need cleanup
Those extensions have become part of ARB about 15 years ago and most if
not all video cards still in use should support the ARB versions. I
believe that at least parts of this code were disfunctional.
This removes the need to define the old qgl function names to the
official OpenGL names. The OpenGL functions are now called directly
without any abstraction.
With this change the "refresh" make target doesn't any longer exists.
It was merged into the "client" target. One will need a "make clean"
before building yQ2 after this change.
