9 commits

Author	SHA1	Message	Date
Christoph Oelckers	09f4071436	Ok, it had to be done: Removed shader support for pre GLSL 1.3/GL 3.0 hardware. The compromises needed to accomodate these are just too bad and would block any attempt at streamlining the code.	2014-05-11 13:27:51 +02:00
Christoph Oelckers	f7404d20fb	- add vertex buffer based drawing for all walls and flats.	2014-05-11 01:23:27 +02:00
Christoph Oelckers	7d3beb665b	- rewrote vertex buffer code to require GL_ARB_BUFFER_STORAGE extension. ... This means it won't work anymore on anything that doesn't support OpenGL 4.0, but I don't think this is a problem. On older NVidia cards performance gains could not be seen and on older AMDs using the vertex buffer was even worse as long as it got mixed with immediate mode rendering.	2014-05-10 21:47:07 +02:00
Christoph Oelckers	69af73d9b9	- alternative configuration using GLEW to get extension functions. This requires GL 2.0, though so it won't be promoted to the mainline for the time being. ... - removed all pre GL 2.0 support.	2014-04-06 14:35:44 +02:00
Christoph Oelckers	2885056f46	- moved GLEXT API out of RenderContext struct.	2013-09-03 18:29:39 +02:00
Christoph Oelckers	26943fe3fd	- removed gl interface function pointers for all OpenGL32.dll entry points.	2013-09-03 14:05:41 +02:00
Christoph Oelckers	b61ef3a107	- bumped minimum supported OpenGL version to 1.4. The engine was already using several 1.3 and 1.4 features which would have caused problems on 1.2. ... - removed gl_vid_compatibility. With the bump to 1.4 no hardware requiring this flag is supported anymore. - disabled 16 bit framebuffers for the same reason. As a conseqence all code for rendering without stencil could also be removed.	2013-08-18 15:41:52 +02:00
Christoph Oelckers	4e4eb7189a	- fixed: negative extra light levels should not be treated like inverse flashes, that's only the case for INT_MIN.	2013-07-22 17:30:08 +02:00
Christoph Oelckers	399d0974ab	- added GL render as of SVN revision 1600.	2013-06-23 09:49:34 +02:00