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105 commits

Author SHA1 Message Date
Christoph Oelckers
47064e24c9 - only bind the uniform buffer if it is actually going to be used. No need to check if we are use a shader storage buffer. 2016-05-01 12:01:44 +02:00
alexey.lysiuk
1deb9742de Do not call UBO functions when no extension available 2016-05-01 11:46:49 +03:00
alexey.lysiuk
461c97d25b Fixed remaining issue with shader patching for old OpenGL 2016-04-30 16:28:19 +03:00
Christoph Oelckers
21283b18f4 - preparations for using clip planes on line portals. 2016-04-29 01:48:06 +02:00
Christoph Oelckers
09f54b0940 - cleaned up the clip plane management for portals. 
Unfortunately the math behind the old clip planes is utterly impenetrable and so poorly documented that I have no idea how to set that up, so it is deactivated for now. It wasn't working anyway.
 2016-04-27 00:41:00 +02:00
Christoph Oelckers
3b1500438d - got rid of VAO's. they have no impact on performance and are a general nuisance if some render paths cannot use them. 
- cleaned up gl_interface and removed gl.compatibility.
 2016-04-26 16:26:34 +02:00
Christoph Oelckers
f066457a48 - add shader patching to allow running the engine with GLSL 1.2. 
- made some initial preparations for the shader-less fallback path.
 2016-04-26 15:26:52 +02:00
Christoph Oelckers
090d13b915 - updated gl_interface to deal with older GL versions. 
- added the framework for allowing multipass textured dynamic lights again.
 2016-04-26 15:20:26 +02:00
Christoph Oelckers
fc57180d7e - added necessary state to implement 3D light splitting using hardware clipping planes. 2016-01-30 23:01:11 +01:00
Christoph Oelckers
45526c2769 - basics for using hardware clip planes to split translucent stuff by 3D floor planes. 2015-04-05 18:55:21 +02:00
Christoph Oelckers
89ce0b8cb7 - test if GLSL version 1.4 can handle uniform buffers on old Intel hardware without making problems... 2014-10-22 16:54:26 +02:00
Christoph Oelckers
fd3128a164 - fixed: When changing enhanced nightvision mode the shaders need to have their fixed colormap state reset to ensure that the new settings get used. 
- fixed: The shader code for handling special fixed colormaps did not use the color vertex attribute which was most evident with the 'shadow' render style on the spectre.
 2014-10-05 09:40:36 +02:00
Ralgor
5cc43137a1 Only require OpenGL 3.0 compatibility profile. 2014-09-14 14:43:42 -05:00
Christoph Oelckers
c6f4c0b6f0 - fixed: FMaterial's tex pointer could be accessed before it was set. 
- allow more than two texture units in shaders.
 2014-09-09 10:03:34 +02:00
Christoph Oelckers
a63871d170 - at least for Intel GMA we need shaders without 'discard' to render non-transparent stuff. The performance penalty is rather hefty here. 2014-08-02 21:06:34 +02:00
Christoph Oelckers
e35fefdc06 - better rebind the active shader after updating the matrices. 2014-08-02 11:59:04 +02:00
Christoph Oelckers
b2860a1d63 - it looks like glProgramUniform is not working correctly with Intel drivers, so better forget about it for setting the view and projection matrices. Even on NVidia the time difference can only be measured in microseconds per frame so it's not a big loss. 2014-08-02 11:57:42 +02:00
Christoph Oelckers
a8e9c1832f - decided to restrict the 2.0 beta to OpenGL 4.x with GL_ARB_buffer_storage extension and removed all code for supporting older versions. 
Sadly, anything else makes no sense.
All the recently made changes live or die, depending on this extension's presence.
Without it, there are major performance issues with the buffer uploads. All of the traditional buffer upload methods are without exception horrendously slow, especially in the context of a Doom engine where frequent small updates are required.
It could be solved with a complete restructuring of the engine, of course, but that's hardly worth the effort, considering it's only for legacy hardware whose market share will inevitably shrink considerably over the next years.
And even then, under the best circumstances I'd still get the same performance as the old immediate mode renderer in GZDoom 1.x and still couldn't implement the additions I'd like to make.

So, since I need to keep GZDoom 1.x around anyway for older GL 2.x hardware, it may as well serve for 3.x hardware, too. It's certainly less work than constantly trying to find workarounds for the older hardware's limitations that cost more time than working on future-proofing the engine.

This new, trimmed down 4.x renderer runs on a core profile configuration and uses persistently mapped buffers for nearly everything that is getting transferred to the GPU. (The global uniforms are still being used as such but they'll be phased out after the first beta release.
 2014-08-01 22:42:39 +02:00
Christoph Oelckers
7967082e60 - use the light buffer to handle dynamic lighting. 2014-08-01 20:59:39 +02:00
Christoph Oelckers
1ec58011d2 - start of light buffer implementation so that we don't have to use uniform arrays which appear to be broken on AMD. 2014-07-31 00:44:22 +02:00
Christoph Oelckers
77d9d9b2a5 - fixed: For updating the model VAO's attribute pointers it is necessary to first bind the vertex buffer we need to refer to, because this is not part of the VAO's state. 2014-07-27 11:53:18 +02:00
Christoph Oelckers
bdf5bbd34e - make the shader timer part of the render state. 2014-07-26 20:56:10 +02:00
Christoph Oelckers
fb6b4238ed - fixed: glProgramUniform is only present from GL 4.1 or a specific extension so it may not be used on systems not supporting it. 2014-07-15 02:48:59 +02:00
Christoph Oelckers
6046b11b4f - all shaders now compile in core profile. 2014-07-15 01:05:53 +02:00
Christoph Oelckers
eedc5a69be - replaced builtin position vertex attribute. 2014-07-15 01:02:48 +02:00
Christoph Oelckers
1b7f5a2e6a - replaced builtin texture coordinate vertex attribute. 2014-07-15 00:59:01 +02:00
Christoph Oelckers
5a322742c3 - remove use of builtin and deprecated color vertex attribute. 2014-07-15 00:37:13 +02:00
Christoph Oelckers
ed8a21fd86 - replaced deprecated alpha testing with shader code. 2014-07-14 21:14:43 +02:00
Christoph Oelckers
ce3653f6e1 - remove all uses of builtin matrices. 2014-07-13 23:13:40 +02:00
Christoph Oelckers
dbb05c5f33 - remove use of builtin texture matrices. 
- make matrix class single precision.
 2014-07-13 20:41:20 +02:00
Christoph Oelckers
00fcf4bc06 - for some reason using world coordinates for clipping in the shader is somewhat imprecise so the clip plane heights have to be adjusted a bit for it. 2014-07-13 13:25:42 +02:00
Christoph Oelckers
d868f60f6c - since the clip planes for plane mirrors did not work anymore I reimplemented them using shader based logic. It still needs to be seen if this affects performance on older hardware. 2014-07-13 12:14:12 +02:00
Christoph Oelckers
7cbffc7c14 - test code removal. 2014-07-10 10:35:02 +02:00
Christoph Oelckers
a936629cec - use default fragment shader for burn and stencil shader, with the time consuming parts disabled by a #define, to avoid code duplication. 2014-07-10 10:33:07 +02:00
Christoph Oelckers
92185f96eb - fixed overflow with storing a sprite's dynamic light color in a PalEntry. 2014-07-01 09:52:41 +02:00
Christoph Oelckers
f710518903 - use a uniform array to store vertex data to render dynamic stuff on GL 3.x hardware without the ARB_buffer_storage extension. 
Due to the way the engine works it needs to render a lot of small primitives with frequent state changes.
But due to the performance of buffer uploads it is impossible to upload each primitive's vertices to a buffer separately because buffer uploads nearly always stall the GPU.
On the other hand, in order to reduce the amount of buffer uploads all the necessary state changes would have to be saved in an array until they can finally be used. This method also imposed an unacceptable overhead.
Fortunately, uploading uniform arrays is very fast and doesn't cause GPU stalls, so now the engine puts the vertex data per primitive into a uniform array and uses a static vertex buffer to index the array in the vertex shader.
This method offers the same performance as immediate mode but only uses core profile features.
 2014-06-30 18:10:55 +02:00
Christoph Oelckers
9d1dbf4eab - fixed: FBufferedUniform1f didn'T work because it used an int as its buffered value. 2014-06-29 14:08:44 +02:00
Christoph Oelckers
ffcb6cb70a - added second vertex coordinate attribute for model interpolation. 2014-06-29 11:00:21 +02:00
Christoph Oelckers
e2e71e072e removed error suppression code from shader compilation. 
With GL 2.x support the engine still had something to fall back on, with that removed it needs to abort.
 2014-06-23 09:26:29 +02:00
Christoph Oelckers
2925c96b59 removed all GL 2.x code. 
After thinking about it for a day or so I believe it's the best option to remove all compatibility code because it's a major obstacle for a transition to a core profile.
 2014-06-21 15:50:32 +02:00
Christoph Oelckers
1aaa1b7bad - removed gl_usevbo CVAR because with recent code changes it has become useless. If GL_ARB_buffer_storage is present, buffers will always be used. 2014-06-15 12:12:24 +02:00
Christoph Oelckers
2ad47935ef Merge branch 'master' into Glew_Version_For_Real 2014-06-01 12:43:17 +02:00
alexey.lysiuk
a26fbc74f0 Fix compilation errors in latest texture-related changes 
GCC and Clang complain about non-POD type passed to variadic function.
 2014-06-01 10:27:16 +03:00
Christoph Oelckers
a1ec6ab1ba - fixed some Linux warnings. 2014-05-24 16:53:57 +02:00
Christoph Oelckers
4d005bdfa0 shader rework 
All those special shaders have been merged together.
Mostly working but the non-shader lighting seems a bit broken.
 2014-05-12 14:45:41 +02:00
Christoph Oelckers
506798f134 allow brightmaps and fullbright objects in fog. The reasons why they were disabled no longer exist. 2014-05-11 23:12:28 +02:00
Christoph Oelckers
c47c7421a3 - route all glColor calls through render state. 
- add sector links to dynamic lights.
 2014-05-11 22:57:42 +02:00
Christoph Oelckers
52056a05bd - changed handling of DynLight in shader to serve as a global dynamic light color for all lighting modes. 2014-05-11 16:49:17 +02:00
Christoph Oelckers
53f4cd0108 - added objectcolor uniform. This will be used to hold the thingcolor for shader based rendering. 2014-05-11 16:06:25 +02:00
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
b09405a8bd - changed rendering of glowing walls so that it doesn't require an additional vertex attribute, just pass the floor and ceiling planes as uniforms. 2014-05-10 17:09:43 +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
95163e378e - added a fog layer when drawing sprites with render style reverse subtract. 2013-12-05 15:06:10 +01:00
Christoph Oelckers
2885056f46 - moved GLEXT API out of RenderContext struct. 2013-09-03 18:29:39 +02:00
Christoph Oelckers
399d0974ab - added GL render as of SVN revision 1600. 2013-06-23 09:49:34 +02:00