DOOM-3-BFG/neo/renderer/RenderSystem_init.cpp

/*
===========================================================================

Doom 3 BFG Edition GPL Source Code
Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").  

Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Doom 3 BFG Edition Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Doom 3 BFG Edition Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#pragma hdrstop
#include "../idlib/precompiled.h"

#include "tr_local.h"

// Vista OpenGL wrapper check
#include "../sys/win32/win_local.h"

// DeviceContext bypasses RenderSystem to work directly with this
idGuiModel * tr_guiModel;

// functions that are not called every frame
glconfig_t	glConfig;

idCVar r_requestStereoPixelFormat( "r_requestStereoPixelFormat", "1", CVAR_RENDERER, "Ask for a stereo GL pixel format on startup" );
idCVar r_debugContext( "r_debugContext", "0", CVAR_RENDERER, "Enable various levels of context debug." );
idCVar r_glDriver( "r_glDriver", "", CVAR_RENDERER, "\"opengl32\", etc." );
idCVar r_skipIntelWorkarounds( "r_skipIntelWorkarounds", "0", CVAR_RENDERER | CVAR_BOOL, "skip workarounds for Intel driver bugs" );
idCVar r_multiSamples( "r_multiSamples", "0", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_INTEGER, "number of antialiasing samples" );
idCVar r_vidMode( "r_vidMode", "0", CVAR_ARCHIVE | CVAR_RENDERER | CVAR_INTEGER, "fullscreen video mode number" );
idCVar r_displayRefresh( "r_displayRefresh", "0", CVAR_RENDERER | CVAR_INTEGER | CVAR_NOCHEAT, "optional display refresh rate option for vid mode", 0.0f, 240.0f );
idCVar r_fullscreen( "r_fullscreen", "1", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_INTEGER, "0 = windowed, 1 = full screen on monitor 1, 2 = full screen on monitor 2, etc" );
idCVar r_customWidth( "r_customWidth", "1280", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_INTEGER, "custom screen width. set r_vidMode to -1 to activate" );
idCVar r_customHeight( "r_customHeight", "720", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_INTEGER, "custom screen height. set r_vidMode to -1 to activate" );
idCVar r_windowX( "r_windowX", "0", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_INTEGER, "Non-fullscreen parameter" );
idCVar r_windowY( "r_windowY", "0", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_INTEGER, "Non-fullscreen parameter" );
idCVar r_windowWidth( "r_windowWidth", "1280", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_INTEGER, "Non-fullscreen parameter" );
idCVar r_windowHeight( "r_windowHeight", "720", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_INTEGER, "Non-fullscreen parameter" );

idCVar r_useViewBypass( "r_useViewBypass", "1", CVAR_RENDERER | CVAR_INTEGER, "bypass a frame of latency to the view" );
idCVar r_useLightPortalFlow( "r_useLightPortalFlow", "1", CVAR_RENDERER | CVAR_BOOL, "use a more precise area reference determination" );
idCVar r_singleTriangle( "r_singleTriangle", "0", CVAR_RENDERER | CVAR_BOOL, "only draw a single triangle per primitive" );
idCVar r_checkBounds( "r_checkBounds", "0", CVAR_RENDERER | CVAR_BOOL, "compare all surface bounds with precalculated ones" );
idCVar r_useConstantMaterials( "r_useConstantMaterials", "1", CVAR_RENDERER | CVAR_BOOL, "use pre-calculated material registers if possible" );
idCVar r_useSilRemap( "r_useSilRemap", "1", CVAR_RENDERER | CVAR_BOOL, "consider verts with the same XYZ, but different ST the same for shadows" );
idCVar r_useNodeCommonChildren( "r_useNodeCommonChildren", "1", CVAR_RENDERER | CVAR_BOOL, "stop pushing reference bounds early when possible" );
idCVar r_useShadowSurfaceScissor( "r_useShadowSurfaceScissor", "1", CVAR_RENDERER | CVAR_BOOL, "scissor shadows by the scissor rect of the interaction surfaces" );
idCVar r_useCachedDynamicModels( "r_useCachedDynamicModels", "1", CVAR_RENDERER | CVAR_BOOL, "cache snapshots of dynamic models" );
idCVar r_useSeamlessCubeMap( "r_useSeamlessCubeMap", "1", CVAR_RENDERER | CVAR_BOOL, "use ARB_seamless_cube_map if available" );
idCVar r_useSRGB( "r_useSRGB", "0", CVAR_RENDERER | CVAR_INTEGER | CVAR_ARCHIVE, "1 = both texture and framebuffer, 2 = framebuffer only, 3 = texture only" );
idCVar r_maxAnisotropicFiltering( "r_maxAnisotropicFiltering", "8", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_INTEGER, "limit aniso filtering" );
idCVar r_useTrilinearFiltering( "r_useTrilinearFiltering", "1", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_BOOL, "Extra quality filtering" );
idCVar r_lodBias( "r_lodBias", "0.5", CVAR_RENDERER | CVAR_ARCHIVE, "image lod bias" );

idCVar r_useStateCaching( "r_useStateCaching", "1", CVAR_RENDERER | CVAR_BOOL, "avoid redundant state changes in GL_*() calls" );

idCVar r_znear( "r_znear", "3", CVAR_RENDERER | CVAR_FLOAT, "near Z clip plane distance", 0.001f, 200.0f );

idCVar r_ignoreGLErrors( "r_ignoreGLErrors", "1", CVAR_RENDERER | CVAR_BOOL, "ignore GL errors" );
idCVar r_swapInterval( "r_swapInterval", "1", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_INTEGER, "0 = tear, 1 = swap-tear where available, 2 = always v-sync" );

idCVar r_gamma( "r_gamma", "1.0", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_FLOAT, "changes gamma tables", 0.5f, 3.0f );
idCVar r_brightness( "r_brightness", "1", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_FLOAT, "changes gamma tables", 0.5f, 2.0f );

idCVar r_jitter( "r_jitter", "0", CVAR_RENDERER | CVAR_BOOL, "randomly subpixel jitter the projection matrix" );

idCVar r_skipStaticInteractions( "r_skipStaticInteractions", "0", CVAR_RENDERER | CVAR_BOOL, "skip interactions created at level load" );
idCVar r_skipDynamicInteractions( "r_skipDynamicInteractions", "0", CVAR_RENDERER | CVAR_BOOL, "skip interactions created after level load" );
idCVar r_skipSuppress( "r_skipSuppress", "0", CVAR_RENDERER | CVAR_BOOL, "ignore the per-view suppressions" );
idCVar r_skipPostProcess( "r_skipPostProcess", "0", CVAR_RENDERER | CVAR_BOOL, "skip all post-process renderings" );
idCVar r_skipInteractions( "r_skipInteractions", "0", CVAR_RENDERER | CVAR_BOOL, "skip all light/surface interaction drawing" );
idCVar r_skipDynamicTextures( "r_skipDynamicTextures", "0", CVAR_RENDERER | CVAR_BOOL, "don't dynamically create textures" );
idCVar r_skipCopyTexture( "r_skipCopyTexture", "0", CVAR_RENDERER | CVAR_BOOL, "do all rendering, but don't actually copyTexSubImage2D" );
idCVar r_skipBackEnd( "r_skipBackEnd", "0", CVAR_RENDERER | CVAR_BOOL, "don't draw anything" );
idCVar r_skipRender( "r_skipRender", "0", CVAR_RENDERER | CVAR_BOOL, "skip 3D rendering, but pass 2D" );
idCVar r_skipRenderContext( "r_skipRenderContext", "0", CVAR_RENDERER | CVAR_BOOL, "NULL the rendering context during backend 3D rendering" );
idCVar r_skipTranslucent( "r_skipTranslucent", "0", CVAR_RENDERER | CVAR_BOOL, "skip the translucent interaction rendering" );
idCVar r_skipAmbient( "r_skipAmbient", "0", CVAR_RENDERER | CVAR_BOOL, "bypasses all non-interaction drawing" );
idCVar r_skipNewAmbient( "r_skipNewAmbient", "0", CVAR_RENDERER | CVAR_BOOL | CVAR_ARCHIVE, "bypasses all vertex/fragment program ambient drawing" );
idCVar r_skipBlendLights( "r_skipBlendLights", "0", CVAR_RENDERER | CVAR_BOOL, "skip all blend lights" );
idCVar r_skipFogLights( "r_skipFogLights", "0", CVAR_RENDERER | CVAR_BOOL, "skip all fog lights" );
idCVar r_skipDeforms( "r_skipDeforms", "0", CVAR_RENDERER | CVAR_BOOL, "leave all deform materials in their original state" );
idCVar r_skipFrontEnd( "r_skipFrontEnd", "0", CVAR_RENDERER | CVAR_BOOL, "bypasses all front end work, but 2D gui rendering still draws" );
idCVar r_skipUpdates( "r_skipUpdates", "0", CVAR_RENDERER | CVAR_BOOL, "1 = don't accept any entity or light updates, making everything static" );
idCVar r_skipDecals( "r_skipDecals", "0", CVAR_RENDERER | CVAR_BOOL, "skip decal surfaces" );
idCVar r_skipOverlays( "r_skipOverlays", "0", CVAR_RENDERER | CVAR_BOOL, "skip overlay surfaces" );
idCVar r_skipSpecular( "r_skipSpecular", "0", CVAR_RENDERER | CVAR_BOOL | CVAR_CHEAT | CVAR_ARCHIVE, "use black for specular1" );
idCVar r_skipBump( "r_skipBump", "0", CVAR_RENDERER | CVAR_BOOL | CVAR_ARCHIVE, "uses a flat surface instead of the bump map" );
idCVar r_skipDiffuse( "r_skipDiffuse", "0", CVAR_RENDERER | CVAR_BOOL, "use black for diffuse" );
idCVar r_skipSubviews( "r_skipSubviews", "0", CVAR_RENDERER | CVAR_INTEGER, "1 = don't render any gui elements on surfaces" );
idCVar r_skipGuiShaders( "r_skipGuiShaders", "0", CVAR_RENDERER | CVAR_INTEGER, "1 = skip all gui elements on surfaces, 2 = skip drawing but still handle events, 3 = draw but skip events", 0, 3, idCmdSystem::ArgCompletion_Integer<0,3> );
idCVar r_skipParticles( "r_skipParticles", "0", CVAR_RENDERER | CVAR_INTEGER, "1 = skip all particle systems", 0, 1, idCmdSystem::ArgCompletion_Integer<0,1> );
idCVar r_skipShadows( "r_skipShadows", "0", CVAR_RENDERER | CVAR_BOOL  | CVAR_ARCHIVE, "disable shadows" );

idCVar r_useLightPortalCulling( "r_useLightPortalCulling", "1", CVAR_RENDERER | CVAR_INTEGER, "0 = none, 1 = cull frustum corners to plane, 2 = exact clip the frustum faces", 0, 2, idCmdSystem::ArgCompletion_Integer<0,2> );
idCVar r_useLightAreaCulling( "r_useLightAreaCulling", "1", CVAR_RENDERER | CVAR_BOOL, "0 = off, 1 = on" );
idCVar r_useLightScissors( "r_useLightScissors", "3", CVAR_RENDERER | CVAR_INTEGER, "0 = no scissor, 1 = non-clipped scissor, 2 = near-clipped scissor, 3 = fully-clipped scissor", 0, 3, idCmdSystem::ArgCompletion_Integer<0,3> );
idCVar r_useEntityPortalCulling( "r_useEntityPortalCulling", "1", CVAR_RENDERER | CVAR_INTEGER, "0 = none, 1 = cull frustum corners to plane, 2 = exact clip the frustum faces", 0, 2, idCmdSystem::ArgCompletion_Integer<0,2> );
idCVar r_logFile( "r_logFile", "0", CVAR_RENDERER | CVAR_INTEGER, "number of frames to emit GL logs" );
idCVar r_clear( "r_clear", "2", CVAR_RENDERER, "force screen clear every frame, 1 = purple, 2 = black, 'r g b' = custom" );

idCVar r_offsetFactor( "r_offsetfactor", "0", CVAR_RENDERER | CVAR_FLOAT, "polygon offset parameter" );
idCVar r_offsetUnits( "r_offsetunits", "-600", CVAR_RENDERER | CVAR_FLOAT, "polygon offset parameter" );

idCVar r_shadowPolygonOffset( "r_shadowPolygonOffset", "-1", CVAR_RENDERER | CVAR_FLOAT, "bias value added to depth test for stencil shadow drawing" );
idCVar r_shadowPolygonFactor( "r_shadowPolygonFactor", "0", CVAR_RENDERER | CVAR_FLOAT, "scale value for stencil shadow drawing" );
idCVar r_subviewOnly( "r_subviewOnly", "0", CVAR_RENDERER | CVAR_BOOL, "1 = don't render main view, allowing subviews to be debugged" );
idCVar r_testGamma( "r_testGamma", "0", CVAR_RENDERER | CVAR_FLOAT, "if > 0 draw a grid pattern to test gamma levels", 0, 195 );
idCVar r_testGammaBias( "r_testGammaBias", "0", CVAR_RENDERER | CVAR_FLOAT, "if > 0 draw a grid pattern to test gamma levels" );
idCVar r_lightScale( "r_lightScale", "3", CVAR_ARCHIVE | CVAR_RENDERER | CVAR_FLOAT, "all light intensities are multiplied by this" );
idCVar r_flareSize( "r_flareSize", "1", CVAR_RENDERER | CVAR_FLOAT, "scale the flare deforms from the material def" ); 

idCVar r_skipPrelightShadows( "r_skipPrelightShadows", "0", CVAR_RENDERER | CVAR_BOOL, "skip the dmap generated static shadow volumes" );
idCVar r_useScissor( "r_useScissor", "1", CVAR_RENDERER | CVAR_BOOL, "scissor clip as portals and lights are processed" );
idCVar r_useLightDepthBounds( "r_useLightDepthBounds", "1", CVAR_RENDERER | CVAR_BOOL, "use depth bounds test on lights to reduce both shadow and interaction fill" );
idCVar r_useShadowDepthBounds( "r_useShadowDepthBounds", "1", CVAR_RENDERER | CVAR_BOOL, "use depth bounds test on individual shadow volumes to reduce shadow fill" );

idCVar r_screenFraction( "r_screenFraction", "100", CVAR_RENDERER | CVAR_INTEGER, "for testing fill rate, the resolution of the entire screen can be changed" );
idCVar r_usePortals( "r_usePortals", "1", CVAR_RENDERER | CVAR_BOOL, " 1 = use portals to perform area culling, otherwise draw everything" );
idCVar r_singleLight( "r_singleLight", "-1", CVAR_RENDERER | CVAR_INTEGER, "suppress all but one light" );
idCVar r_singleEntity( "r_singleEntity", "-1", CVAR_RENDERER | CVAR_INTEGER, "suppress all but one entity" );
idCVar r_singleSurface( "r_singleSurface", "-1", CVAR_RENDERER | CVAR_INTEGER, "suppress all but one surface on each entity" );
idCVar r_singleArea( "r_singleArea", "0", CVAR_RENDERER | CVAR_BOOL, "only draw the portal area the view is actually in" );
idCVar r_orderIndexes( "r_orderIndexes", "1", CVAR_RENDERER | CVAR_BOOL, "perform index reorganization to optimize vertex use" );
idCVar r_lightAllBackFaces( "r_lightAllBackFaces", "0", CVAR_RENDERER | CVAR_BOOL, "light all the back faces, even when they would be shadowed" );

// visual debugging info
idCVar r_showPortals( "r_showPortals", "0", CVAR_RENDERER | CVAR_BOOL, "draw portal outlines in color based on passed / not passed" );
idCVar r_showUnsmoothedTangents( "r_showUnsmoothedTangents", "0", CVAR_RENDERER | CVAR_BOOL, "if 1, put all nvidia register combiner programming in display lists" );
idCVar r_showSilhouette( "r_showSilhouette", "0", CVAR_RENDERER | CVAR_BOOL, "highlight edges that are casting shadow planes" );
idCVar r_showVertexColor( "r_showVertexColor", "0", CVAR_RENDERER | CVAR_BOOL, "draws all triangles with the solid vertex color" );
idCVar r_showUpdates( "r_showUpdates", "0", CVAR_RENDERER | CVAR_BOOL, "report entity and light updates and ref counts" );
idCVar r_showDemo( "r_showDemo", "0", CVAR_RENDERER | CVAR_BOOL, "report reads and writes to the demo file" );
idCVar r_showDynamic( "r_showDynamic", "0", CVAR_RENDERER | CVAR_BOOL, "report stats on dynamic surface generation" );
idCVar r_showTrace( "r_showTrace", "0", CVAR_RENDERER | CVAR_INTEGER, "show the intersection of an eye trace with the world", idCmdSystem::ArgCompletion_Integer<0,2> );
idCVar r_showIntensity( "r_showIntensity", "0", CVAR_RENDERER | CVAR_BOOL, "draw the screen colors based on intensity, red = 0, green = 128, blue = 255" );
idCVar r_showLights( "r_showLights", "0", CVAR_RENDERER | CVAR_INTEGER, "1 = just print volumes numbers, highlighting ones covering the view, 2 = also draw planes of each volume, 3 = also draw edges of each volume", 0, 3, idCmdSystem::ArgCompletion_Integer<0,3> );
idCVar r_showShadows( "r_showShadows", "0", CVAR_RENDERER | CVAR_INTEGER, "1 = visualize the stencil shadow volumes, 2 = draw filled in", 0, 3, idCmdSystem::ArgCompletion_Integer<0,3> );
idCVar r_showLightScissors( "r_showLightScissors", "0", CVAR_RENDERER | CVAR_BOOL, "show light scissor rectangles" );
idCVar r_showLightCount( "r_showLightCount", "0", CVAR_RENDERER | CVAR_INTEGER, "1 = colors surfaces based on light count, 2 = also count everything through walls, 3 = also print overdraw", 0, 3, idCmdSystem::ArgCompletion_Integer<0,3> );
idCVar r_showViewEntitys( "r_showViewEntitys", "0", CVAR_RENDERER | CVAR_INTEGER, "1 = displays the bounding boxes of all view models, 2 = print index numbers" );
idCVar r_showTris( "r_showTris", "0", CVAR_RENDERER | CVAR_INTEGER, "enables wireframe rendering of the world, 1 = only draw visible ones, 2 = draw all front facing, 3 = draw all, 4 = draw with alpha", 0, 4, idCmdSystem::ArgCompletion_Integer<0,4> );
idCVar r_showSurfaceInfo( "r_showSurfaceInfo", "0", CVAR_RENDERER | CVAR_BOOL, "show surface material name under crosshair" );
idCVar r_showNormals( "r_showNormals", "0", CVAR_RENDERER | CVAR_FLOAT, "draws wireframe normals" );
idCVar r_showMemory( "r_showMemory", "0", CVAR_RENDERER | CVAR_BOOL, "print frame memory utilization" );
idCVar r_showCull( "r_showCull", "0", CVAR_RENDERER | CVAR_BOOL, "report sphere and box culling stats" );
idCVar r_showAddModel( "r_showAddModel", "0", CVAR_RENDERER | CVAR_BOOL, "report stats from tr_addModel" );
idCVar r_showDepth( "r_showDepth", "0", CVAR_RENDERER | CVAR_BOOL, "display the contents of the depth buffer and the depth range" );
idCVar r_showSurfaces( "r_showSurfaces", "0", CVAR_RENDERER | CVAR_BOOL, "report surface/light/shadow counts" );
idCVar r_showPrimitives( "r_showPrimitives", "0", CVAR_RENDERER | CVAR_INTEGER, "report drawsurf/index/vertex counts" );
idCVar r_showEdges( "r_showEdges", "0", CVAR_RENDERER | CVAR_BOOL, "draw the sil edges" );
idCVar r_showTexturePolarity( "r_showTexturePolarity", "0", CVAR_RENDERER | CVAR_BOOL, "shade triangles by texture area polarity" );
idCVar r_showTangentSpace( "r_showTangentSpace", "0", CVAR_RENDERER | CVAR_INTEGER, "shade triangles by tangent space, 1 = use 1st tangent vector, 2 = use 2nd tangent vector, 3 = use normal vector", 0, 3, idCmdSystem::ArgCompletion_Integer<0,3> );
idCVar r_showDominantTri( "r_showDominantTri", "0", CVAR_RENDERER | CVAR_BOOL, "draw lines from vertexes to center of dominant triangles" );
idCVar r_showTextureVectors( "r_showTextureVectors", "0", CVAR_RENDERER | CVAR_FLOAT, " if > 0 draw each triangles texture (tangent) vectors" );
idCVar r_showOverDraw( "r_showOverDraw", "0", CVAR_RENDERER | CVAR_INTEGER, "1 = geometry overdraw, 2 = light interaction overdraw, 3 = geometry and light interaction overdraw", 0, 3, idCmdSystem::ArgCompletion_Integer<0,3> );

idCVar r_useEntityCallbacks( "r_useEntityCallbacks", "1", CVAR_RENDERER | CVAR_BOOL, "if 0, issue the callback immediately at update time, rather than defering" );

idCVar r_showSkel( "r_showSkel", "0", CVAR_RENDERER | CVAR_INTEGER, "draw the skeleton when model animates, 1 = draw model with skeleton, 2 = draw skeleton only", 0, 2, idCmdSystem::ArgCompletion_Integer<0,2> );
idCVar r_jointNameScale( "r_jointNameScale", "0.02", CVAR_RENDERER | CVAR_FLOAT, "size of joint names when r_showskel is set to 1" );
idCVar r_jointNameOffset( "r_jointNameOffset", "0.5", CVAR_RENDERER | CVAR_FLOAT, "offset of joint names when r_showskel is set to 1" );

idCVar r_debugLineDepthTest( "r_debugLineDepthTest", "0", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_BOOL, "perform depth test on debug lines" );
idCVar r_debugLineWidth( "r_debugLineWidth", "1", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_BOOL, "width of debug lines" );
idCVar r_debugArrowStep( "r_debugArrowStep", "120", CVAR_RENDERER | CVAR_ARCHIVE | CVAR_INTEGER, "step size of arrow cone line rotation in degrees", 0, 120 );
idCVar r_debugPolygonFilled( "r_debugPolygonFilled", "1", CVAR_RENDERER | CVAR_BOOL, "draw a filled polygon" );

idCVar r_materialOverride( "r_materialOverride", "", CVAR_RENDERER, "overrides all materials", idCmdSystem::ArgCompletion_Decl<DECL_MATERIAL> );

idCVar r_debugRenderToTexture( "r_debugRenderToTexture", "0", CVAR_RENDERER | CVAR_INTEGER, "" );

idCVar stereoRender_enable( "stereoRender_enable", "0", CVAR_INTEGER | CVAR_ARCHIVE, "1 = side-by-side compressed, 2 = top and bottom compressed, 3 = side-by-side, 4 = 720 frame packed, 5 = interlaced, 6 = OpenGL quad buffer" );
idCVar stereoRender_swapEyes( "stereoRender_swapEyes", "0", CVAR_BOOL | CVAR_ARCHIVE, "reverse eye adjustments" );
idCVar stereoRender_deGhost( "stereoRender_deGhost", "0.05", CVAR_FLOAT | CVAR_ARCHIVE, "subtract from opposite eye to reduce ghosting" );


// GL_ARB_multitexture
PFNGLACTIVETEXTUREPROC					qglActiveTextureARB;
PFNGLCLIENTACTIVETEXTUREPROC			qglClientActiveTextureARB;

// GL_EXT_direct_state_access
PFNGLBINDMULTITEXTUREEXTPROC			qglBindMultiTextureEXT;

// GL_ARB_texture_compression
PFNGLCOMPRESSEDTEXIMAGE2DARBPROC		qglCompressedTexImage2DARB;
PFNGLCOMPRESSEDTEXSUBIMAGE2DARBPROC		qglCompressedTexSubImage2DARB;
PFNGLGETCOMPRESSEDTEXIMAGEARBPROC		qglGetCompressedTexImageARB;

// GL_ARB_vertex_buffer_object
PFNGLBINDBUFFERARBPROC					qglBindBufferARB;
PFNGLBINDBUFFERRANGEPROC				qglBindBufferRange;
PFNGLDELETEBUFFERSARBPROC				qglDeleteBuffersARB;
PFNGLGENBUFFERSARBPROC					qglGenBuffersARB;
PFNGLISBUFFERARBPROC					qglIsBufferARB;
PFNGLBUFFERDATAARBPROC					qglBufferDataARB;
PFNGLBUFFERSUBDATAARBPROC				qglBufferSubDataARB;
PFNGLGETBUFFERSUBDATAARBPROC			qglGetBufferSubDataARB;
PFNGLMAPBUFFERARBPROC					qglMapBufferARB;
PFNGLUNMAPBUFFERARBPROC					qglUnmapBufferARB;
PFNGLGETBUFFERPARAMETERIVARBPROC		qglGetBufferParameterivARB;
PFNGLGETBUFFERPOINTERVARBPROC			qglGetBufferPointervARB;

// GL_ARB_map_buffer_range
PFNGLMAPBUFFERRANGEPROC					qglMapBufferRange;

// GL_ARB_draw_elements_base_vertex
PFNGLDRAWELEMENTSBASEVERTEXPROC  		qglDrawElementsBaseVertex;

// GL_ARB_vertex_array_object
PFNGLGENVERTEXARRAYSPROC				qglGenVertexArrays;
PFNGLBINDVERTEXARRAYPROC				qglBindVertexArray;
PFNGLDELETEVERTEXARRAYSPROC				qglDeleteVertexArrays;

// GL_ARB_vertex_program / GL_ARB_fragment_program
PFNGLVERTEXATTRIBPOINTERARBPROC			qglVertexAttribPointerARB;
PFNGLENABLEVERTEXATTRIBARRAYARBPROC		qglEnableVertexAttribArrayARB;
PFNGLDISABLEVERTEXATTRIBARRAYARBPROC	qglDisableVertexAttribArrayARB;
PFNGLPROGRAMSTRINGARBPROC				qglProgramStringARB;
PFNGLBINDPROGRAMARBPROC					qglBindProgramARB;
PFNGLGENPROGRAMSARBPROC					qglGenProgramsARB;
PFNGLDELETEPROGRAMSARBPROC				qglDeleteProgramsARB;
PFNGLPROGRAMENVPARAMETER4FVARBPROC		qglProgramEnvParameter4fvARB;
PFNGLPROGRAMLOCALPARAMETER4FVARBPROC	qglProgramLocalParameter4fvARB;

// GLSL / OpenGL 2.0
PFNGLCREATESHADERPROC					qglCreateShader;
PFNGLDELETESHADERPROC					qglDeleteShader;
PFNGLSHADERSOURCEPROC					qglShaderSource;
PFNGLCOMPILESHADERPROC					qglCompileShader;
PFNGLGETSHADERIVPROC					qglGetShaderiv;
PFNGLGETSHADERINFOLOGPROC				qglGetShaderInfoLog;
PFNGLCREATEPROGRAMPROC					qglCreateProgram;
PFNGLDELETEPROGRAMPROC					qglDeleteProgram;
PFNGLATTACHSHADERPROC					qglAttachShader;
PFNGLDETACHSHADERPROC					qglDetachShader;
PFNGLLINKPROGRAMPROC					qglLinkProgram;
PFNGLUSEPROGRAMPROC						qglUseProgram;
PFNGLGETPROGRAMIVPROC					qglGetProgramiv;
PFNGLGETPROGRAMINFOLOGPROC				qglGetProgramInfoLog;
PFNGLPROGRAMPARAMETERIPROC				qglProgramParameteri;
PFNGLBINDATTRIBLOCATIONPROC				qglBindAttribLocation;
PFNGLGETUNIFORMLOCATIONPROC				qglGetUniformLocation;
PFNGLUNIFORM1IPROC						qglUniform1i;
PFNGLUNIFORM4FVPROC						qglUniform4fv;

// GL_ARB_uniform_buffer_object
PFNGLGETUNIFORMBLOCKINDEXPROC			qglGetUniformBlockIndex;
PFNGLUNIFORMBLOCKBINDINGPROC			qglUniformBlockBinding;

// GL_ATI_separate_stencil / OpenGL 2.0
PFNGLSTENCILOPSEPARATEATIPROC			qglStencilOpSeparate;
PFNGLSTENCILFUNCSEPARATEATIPROC			qglStencilFuncSeparate;

// GL_EXT_depth_bounds_test
PFNGLDEPTHBOUNDSEXTPROC                 qglDepthBoundsEXT;

// GL_ARB_sync
PFNGLFENCESYNCPROC						qglFenceSync;
PFNGLISSYNCPROC							qglIsSync;
PFNGLCLIENTWAITSYNCPROC					qglClientWaitSync;
PFNGLDELETESYNCPROC						qglDeleteSync;

// GL_ARB_occlusion_query
PFNGLGENQUERIESARBPROC					qglGenQueriesARB;
PFNGLDELETEQUERIESARBPROC				qglDeleteQueriesARB;
PFNGLISQUERYARBPROC						qglIsQueryARB;
PFNGLBEGINQUERYARBPROC					qglBeginQueryARB;
PFNGLENDQUERYARBPROC					qglEndQueryARB;
PFNGLGETQUERYIVARBPROC					qglGetQueryivARB;
PFNGLGETQUERYOBJECTIVARBPROC			qglGetQueryObjectivARB;
PFNGLGETQUERYOBJECTUIVARBPROC			qglGetQueryObjectuivARB;

// GL_ARB_timer_query / GL_EXT_timer_query
PFNGLGETQUERYOBJECTUI64VEXTPROC			qglGetQueryObjectui64vEXT;

// GL_ARB_debug_output
PFNGLDEBUGMESSAGECONTROLARBPROC			qglDebugMessageControlARB;
PFNGLDEBUGMESSAGEINSERTARBPROC			qglDebugMessageInsertARB;
PFNGLDEBUGMESSAGECALLBACKARBPROC		qglDebugMessageCallbackARB;
PFNGLGETDEBUGMESSAGELOGARBPROC			qglGetDebugMessageLogARB;

PFNGLGETSTRINGIPROC						qglGetStringi;

/*
========================
glBindMultiTextureEXT

As of 2011/09/16 the Intel drivers for "Sandy Bridge" and "Ivy Bridge" integrated graphics do not support this extension.
========================
*/
void APIENTRY glBindMultiTextureEXT( GLenum texunit, GLenum target, GLuint texture ) {
	qglActiveTextureARB( texunit );
	qglBindTexture( target, texture );
}


/*
=================
R_CheckExtension
=================
*/
bool R_CheckExtension( char *name ) {
	if ( !strstr( glConfig.extensions_string, name ) ) {
		common->Printf( "X..%s not found\n", name );
		return false;
	}

	common->Printf( "...using %s\n", name );
	return true;
}


/*
========================
DebugCallback

For ARB_debug_output
========================
*/
static void CALLBACK DebugCallback(unsigned int source, unsigned int type,
								   unsigned int id, unsigned int severity, int length, const char * message, void * userParam) {
	// it probably isn't safe to do an idLib::Printf at this point
	OutputDebugString( message );
	OutputDebugString( "\n" );
}

/*
==================
R_CheckPortableExtensions
==================
*/
static void R_CheckPortableExtensions() {
	glConfig.glVersion = atof( glConfig.version_string );
	const char * badVideoCard = idLocalization::GetString( "#str_06780" );
	if ( glConfig.glVersion < 2.0f ) {
		idLib::FatalError( badVideoCard );
	}

	if ( idStr::Icmpn( glConfig.renderer_string, "ATI ", 4 ) == 0 || idStr::Icmpn( glConfig.renderer_string, "AMD ", 4 ) == 0 ) {
		glConfig.vendor = VENDOR_AMD;
	} else if ( idStr::Icmpn( glConfig.renderer_string, "NVIDIA", 6 ) == 0 ) {
		glConfig.vendor = VENDOR_NVIDIA;
	} else if ( idStr::Icmpn( glConfig.renderer_string, "Intel", 5 ) == 0 ) {
		glConfig.vendor = VENDOR_INTEL;
	}

	// GL_ARB_multitexture
	glConfig.multitextureAvailable = R_CheckExtension( "GL_ARB_multitexture" );
	if ( glConfig.multitextureAvailable ) {
		qglActiveTextureARB = (void(APIENTRY *)(GLenum))GLimp_ExtensionPointer( "glActiveTextureARB" );
		qglClientActiveTextureARB = (void(APIENTRY *)(GLenum))GLimp_ExtensionPointer( "glClientActiveTextureARB" );
	}

	// GL_EXT_direct_state_access
	glConfig.directStateAccess = R_CheckExtension( "GL_EXT_direct_state_access" );
	if ( glConfig.directStateAccess ) {
		qglBindMultiTextureEXT = (PFNGLBINDMULTITEXTUREEXTPROC)GLimp_ExtensionPointer( "glBindMultiTextureEXT" );
	} else {
		qglBindMultiTextureEXT = glBindMultiTextureEXT;
	}

	// GL_ARB_texture_compression + GL_S3_s3tc
	// DRI drivers may have GL_ARB_texture_compression but no GL_EXT_texture_compression_s3tc
	glConfig.textureCompressionAvailable = R_CheckExtension( "GL_ARB_texture_compression" ) && R_CheckExtension( "GL_EXT_texture_compression_s3tc" );
	if ( glConfig.textureCompressionAvailable ) {
		qglCompressedTexImage2DARB = (PFNGLCOMPRESSEDTEXIMAGE2DARBPROC)GLimp_ExtensionPointer( "glCompressedTexImage2DARB" );
		qglCompressedTexSubImage2DARB = (PFNGLCOMPRESSEDTEXSUBIMAGE2DARBPROC)GLimp_ExtensionPointer( "glCompressedTexSubImage2DARB" );
		qglGetCompressedTexImageARB = (PFNGLGETCOMPRESSEDTEXIMAGEARBPROC)GLimp_ExtensionPointer( "glGetCompressedTexImageARB" );
	}

	// GL_EXT_texture_filter_anisotropic
	glConfig.anisotropicFilterAvailable = R_CheckExtension( "GL_EXT_texture_filter_anisotropic" );
	if ( glConfig.anisotropicFilterAvailable ) {
		qglGetFloatv( GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &glConfig.maxTextureAnisotropy );
		common->Printf( "   maxTextureAnisotropy: %f\n", glConfig.maxTextureAnisotropy );
	} else {
		glConfig.maxTextureAnisotropy = 1;
	}

	// GL_EXT_texture_lod_bias
	// The actual extension is broken as specificed, storing the state in the texture unit instead
	// of the texture object.  The behavior in GL 1.4 is the behavior we use.
	glConfig.textureLODBiasAvailable = ( glConfig.glVersion >= 1.4 || R_CheckExtension( "GL_EXT_texture_lod_bias" ) );
	if ( glConfig.textureLODBiasAvailable ) {
		common->Printf( "...using %s\n", "GL_EXT_texture_lod_bias" );
	} else {
		common->Printf( "X..%s not found\n", "GL_EXT_texture_lod_bias" );
	}

	// GL_ARB_seamless_cube_map
	glConfig.seamlessCubeMapAvailable = R_CheckExtension( "GL_ARB_seamless_cube_map" );
	r_useSeamlessCubeMap.SetModified();		// the CheckCvars() next frame will enable / disable it

	// GL_ARB_framebuffer_sRGB
	glConfig.sRGBFramebufferAvailable = R_CheckExtension( "GL_ARB_framebuffer_sRGB" );
	r_useSRGB.SetModified();		// the CheckCvars() next frame will enable / disable it

	// GL_ARB_vertex_buffer_object
	glConfig.vertexBufferObjectAvailable = R_CheckExtension( "GL_ARB_vertex_buffer_object" );
	if ( glConfig.vertexBufferObjectAvailable ) {
		qglBindBufferARB = (PFNGLBINDBUFFERARBPROC)GLimp_ExtensionPointer( "glBindBufferARB" );
		qglBindBufferRange = (PFNGLBINDBUFFERRANGEPROC)GLimp_ExtensionPointer( "glBindBufferRange" );
		qglDeleteBuffersARB = (PFNGLDELETEBUFFERSARBPROC)GLimp_ExtensionPointer( "glDeleteBuffersARB" );
		qglGenBuffersARB = (PFNGLGENBUFFERSARBPROC)GLimp_ExtensionPointer( "glGenBuffersARB" );
		qglIsBufferARB = (PFNGLISBUFFERARBPROC)GLimp_ExtensionPointer( "glIsBufferARB" );
		qglBufferDataARB = (PFNGLBUFFERDATAARBPROC)GLimp_ExtensionPointer( "glBufferDataARB" );
		qglBufferSubDataARB = (PFNGLBUFFERSUBDATAARBPROC)GLimp_ExtensionPointer( "glBufferSubDataARB" );
		qglGetBufferSubDataARB = (PFNGLGETBUFFERSUBDATAARBPROC)GLimp_ExtensionPointer( "glGetBufferSubDataARB" );
		qglMapBufferARB = (PFNGLMAPBUFFERARBPROC)GLimp_ExtensionPointer( "glMapBufferARB" );
		qglUnmapBufferARB = (PFNGLUNMAPBUFFERARBPROC)GLimp_ExtensionPointer( "glUnmapBufferARB" );
		qglGetBufferParameterivARB = (PFNGLGETBUFFERPARAMETERIVARBPROC)GLimp_ExtensionPointer( "glGetBufferParameterivARB" );
		qglGetBufferPointervARB = (PFNGLGETBUFFERPOINTERVARBPROC)GLimp_ExtensionPointer( "glGetBufferPointervARB" );
	}

	// GL_ARB_map_buffer_range, map a section of a buffer object's data store
	glConfig.mapBufferRangeAvailable = R_CheckExtension( "GL_ARB_map_buffer_range" );
	if ( glConfig.mapBufferRangeAvailable ) {
		qglMapBufferRange = (PFNGLMAPBUFFERRANGEPROC)GLimp_ExtensionPointer( "glMapBufferRange" );
	}

	// GL_ARB_vertex_array_object
	glConfig.vertexArrayObjectAvailable = R_CheckExtension( "GL_ARB_vertex_array_object" );
	if ( glConfig.vertexArrayObjectAvailable ) {
		qglGenVertexArrays = (PFNGLGENVERTEXARRAYSPROC)GLimp_ExtensionPointer( "glGenVertexArrays" );
		qglBindVertexArray = (PFNGLBINDVERTEXARRAYPROC)GLimp_ExtensionPointer( "glBindVertexArray" );
		qglDeleteVertexArrays = (PFNGLDELETEVERTEXARRAYSPROC)GLimp_ExtensionPointer( "glDeleteVertexArrays" );
	}

	// GL_ARB_draw_elements_base_vertex
	glConfig.drawElementsBaseVertexAvailable = R_CheckExtension( "GL_ARB_draw_elements_base_vertex" );
	if ( glConfig.drawElementsBaseVertexAvailable ) {
		qglDrawElementsBaseVertex = (PFNGLDRAWELEMENTSBASEVERTEXPROC)GLimp_ExtensionPointer( "glDrawElementsBaseVertex" );
	}

	// GL_ARB_vertex_program / GL_ARB_fragment_program
	glConfig.fragmentProgramAvailable = R_CheckExtension( "GL_ARB_fragment_program" );
	if ( glConfig.fragmentProgramAvailable ) {
		qglVertexAttribPointerARB = (PFNGLVERTEXATTRIBPOINTERARBPROC)GLimp_ExtensionPointer( "glVertexAttribPointerARB" );
		qglEnableVertexAttribArrayARB = (PFNGLENABLEVERTEXATTRIBARRAYARBPROC)GLimp_ExtensionPointer( "glEnableVertexAttribArrayARB" );
		qglDisableVertexAttribArrayARB = (PFNGLDISABLEVERTEXATTRIBARRAYARBPROC)GLimp_ExtensionPointer( "glDisableVertexAttribArrayARB" );
		qglProgramStringARB = (PFNGLPROGRAMSTRINGARBPROC)GLimp_ExtensionPointer( "glProgramStringARB" );
		qglBindProgramARB = (PFNGLBINDPROGRAMARBPROC)GLimp_ExtensionPointer( "glBindProgramARB" );
		qglGenProgramsARB = (PFNGLGENPROGRAMSARBPROC)GLimp_ExtensionPointer( "glGenProgramsARB" );
		qglDeleteProgramsARB = (PFNGLDELETEPROGRAMSARBPROC)GLimp_ExtensionPointer( "glDeleteProgramsARB" );
		qglProgramEnvParameter4fvARB = (PFNGLPROGRAMENVPARAMETER4FVARBPROC)GLimp_ExtensionPointer( "glProgramEnvParameter4fvARB" );
		qglProgramLocalParameter4fvARB = (PFNGLPROGRAMLOCALPARAMETER4FVARBPROC)GLimp_ExtensionPointer( "glProgramLocalParameter4fvARB" );

		qglGetIntegerv( GL_MAX_TEXTURE_COORDS_ARB, (GLint *)&glConfig.maxTextureCoords );
		qglGetIntegerv( GL_MAX_TEXTURE_IMAGE_UNITS_ARB, (GLint *)&glConfig.maxTextureImageUnits );
	}

	// GLSL, core in OpenGL > 2.0
	glConfig.glslAvailable = ( glConfig.glVersion >= 2.0f );
	if ( glConfig.glslAvailable ) {
		qglCreateShader = (PFNGLCREATESHADERPROC)GLimp_ExtensionPointer( "glCreateShader" );
		qglDeleteShader = (PFNGLDELETESHADERPROC)GLimp_ExtensionPointer( "glDeleteShader" );
		qglShaderSource = (PFNGLSHADERSOURCEPROC)GLimp_ExtensionPointer( "glShaderSource" );
		qglCompileShader = (PFNGLCOMPILESHADERPROC)GLimp_ExtensionPointer( "glCompileShader" );
		qglGetShaderiv = (PFNGLGETSHADERIVPROC)GLimp_ExtensionPointer( "glGetShaderiv" );
		qglGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)GLimp_ExtensionPointer( "glGetShaderInfoLog" );
		qglCreateProgram = (PFNGLCREATEPROGRAMPROC)GLimp_ExtensionPointer( "glCreateProgram" );
		qglDeleteProgram = (PFNGLDELETEPROGRAMPROC)GLimp_ExtensionPointer( "glDeleteProgram" );
		qglAttachShader = (PFNGLATTACHSHADERPROC)GLimp_ExtensionPointer( "glAttachShader" );
		qglDetachShader = (PFNGLDETACHSHADERPROC)GLimp_ExtensionPointer( "glDetachShader" );
		qglLinkProgram = (PFNGLLINKPROGRAMPROC)GLimp_ExtensionPointer( "glLinkProgram" );
		qglUseProgram = (PFNGLUSEPROGRAMPROC)GLimp_ExtensionPointer( "glUseProgram" );
		qglGetProgramiv = (PFNGLGETPROGRAMIVPROC)GLimp_ExtensionPointer( "glGetProgramiv" );
		qglGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)GLimp_ExtensionPointer( "glGetProgramInfoLog" );
		qglBindAttribLocation = (PFNGLBINDATTRIBLOCATIONPROC)GLimp_ExtensionPointer( "glBindAttribLocation" );
		qglGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)GLimp_ExtensionPointer( "glGetUniformLocation" );
		qglUniform1i = (PFNGLUNIFORM1IPROC)GLimp_ExtensionPointer( "glUniform1i" );
		qglUniform4fv = (PFNGLUNIFORM4FVPROC)GLimp_ExtensionPointer( "glUniform4fv" );
	}

	// GL_ARB_uniform_buffer_object
	glConfig.uniformBufferAvailable = R_CheckExtension( "GL_ARB_uniform_buffer_object" );
	if ( glConfig.uniformBufferAvailable ) {
		qglGetUniformBlockIndex = (PFNGLGETUNIFORMBLOCKINDEXPROC)GLimp_ExtensionPointer( "glGetUniformBlockIndex" );
		qglUniformBlockBinding = (PFNGLUNIFORMBLOCKBINDINGPROC)GLimp_ExtensionPointer( "glUniformBlockBinding" );

		qglGetIntegerv( GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, (GLint *)&glConfig.uniformBufferOffsetAlignment );
		if ( glConfig.uniformBufferOffsetAlignment < 256 ) {
			glConfig.uniformBufferOffsetAlignment = 256;
		}
	}

	// ATI_separate_stencil / OpenGL 2.0 separate stencil
	glConfig.twoSidedStencilAvailable = ( glConfig.glVersion >= 2.0f ) || R_CheckExtension( "GL_ATI_separate_stencil" );
	if ( glConfig.twoSidedStencilAvailable ) {
		qglStencilOpSeparate = (PFNGLSTENCILOPSEPARATEATIPROC)GLimp_ExtensionPointer( "glStencilOpSeparate" );
		qglStencilFuncSeparate = (PFNGLSTENCILFUNCSEPARATEATIPROC)GLimp_ExtensionPointer( "glStencilFuncSeparate" );
	}

	// GL_EXT_depth_bounds_test
 	glConfig.depthBoundsTestAvailable = R_CheckExtension( "GL_EXT_depth_bounds_test" );
 	if ( glConfig.depthBoundsTestAvailable ) {
 		qglDepthBoundsEXT = (PFNGLDEPTHBOUNDSEXTPROC)GLimp_ExtensionPointer( "glDepthBoundsEXT" );
 	}

	// GL_ARB_sync
	glConfig.syncAvailable = R_CheckExtension( "GL_ARB_sync" ) &&
		// as of 5/24/2012 (driver version 15.26.12.64.2761) sync objects
		// do not appear to work for the Intel HD 4000 graphics
		( glConfig.vendor != VENDOR_INTEL || r_skipIntelWorkarounds.GetBool() );
	if ( glConfig.syncAvailable ) {
		qglFenceSync = (PFNGLFENCESYNCPROC)GLimp_ExtensionPointer( "glFenceSync" );
		qglIsSync = (PFNGLISSYNCPROC)GLimp_ExtensionPointer( "glIsSync" );
		qglClientWaitSync = (PFNGLCLIENTWAITSYNCPROC)GLimp_ExtensionPointer( "glClientWaitSync" );
		qglDeleteSync = (PFNGLDELETESYNCPROC)GLimp_ExtensionPointer( "glDeleteSync" );
	}

	// GL_ARB_occlusion_query
	glConfig.occlusionQueryAvailable = R_CheckExtension( "GL_ARB_occlusion_query" );
	if ( glConfig.occlusionQueryAvailable ) {
		// defined in GL_ARB_occlusion_query, which is required for GL_EXT_timer_query
		qglGenQueriesARB = (PFNGLGENQUERIESARBPROC)GLimp_ExtensionPointer( "glGenQueriesARB" );
		qglDeleteQueriesARB = (PFNGLDELETEQUERIESARBPROC)GLimp_ExtensionPointer( "glDeleteQueriesARB" );
		qglIsQueryARB = (PFNGLISQUERYARBPROC)GLimp_ExtensionPointer( "glIsQueryARB" );
		qglBeginQueryARB = (PFNGLBEGINQUERYARBPROC)GLimp_ExtensionPointer( "glBeginQueryARB" );
		qglEndQueryARB = (PFNGLENDQUERYARBPROC)GLimp_ExtensionPointer( "glEndQueryARB" );
		qglGetQueryivARB = (PFNGLGETQUERYIVARBPROC)GLimp_ExtensionPointer( "glGetQueryivARB" );
		qglGetQueryObjectivARB = (PFNGLGETQUERYOBJECTIVARBPROC)GLimp_ExtensionPointer( "glGetQueryObjectivARB" );
		qglGetQueryObjectuivARB = (PFNGLGETQUERYOBJECTUIVARBPROC)GLimp_ExtensionPointer( "glGetQueryObjectuivARB" );
	}

	// GL_ARB_timer_query
	glConfig.timerQueryAvailable = R_CheckExtension( "GL_ARB_timer_query" ) || R_CheckExtension( "GL_EXT_timer_query" );
	if ( glConfig.timerQueryAvailable ) {
		qglGetQueryObjectui64vEXT = (PFNGLGETQUERYOBJECTUI64VEXTPROC)GLimp_ExtensionPointer( "glGetQueryObjectui64vARB" );
		if ( qglGetQueryObjectui64vEXT == NULL ) {
			qglGetQueryObjectui64vEXT = (PFNGLGETQUERYOBJECTUI64VEXTPROC)GLimp_ExtensionPointer( "glGetQueryObjectui64vEXT" );
		}
	}

	// GL_ARB_debug_output
	glConfig.debugOutputAvailable = R_CheckExtension( "GL_ARB_debug_output" );
	if ( glConfig.debugOutputAvailable ) {
		qglDebugMessageControlARB   = (PFNGLDEBUGMESSAGECONTROLARBPROC)GLimp_ExtensionPointer( "glDebugMessageControlARB" );
		qglDebugMessageInsertARB    = (PFNGLDEBUGMESSAGEINSERTARBPROC)GLimp_ExtensionPointer( "glDebugMessageInsertARB" );
		qglDebugMessageCallbackARB  = (PFNGLDEBUGMESSAGECALLBACKARBPROC)GLimp_ExtensionPointer( "glDebugMessageCallbackARB" );
		qglGetDebugMessageLogARB    = (PFNGLGETDEBUGMESSAGELOGARBPROC)GLimp_ExtensionPointer( "glGetDebugMessageLogARB" );

		if ( r_debugContext.GetInteger() >= 1 ) {
			qglDebugMessageCallbackARB( DebugCallback, NULL );
		}
		if ( r_debugContext.GetInteger() >= 2 ) {
			// force everything to happen in the main thread instead of in a separate driver thread
			glEnable( GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB );
		}
		if ( r_debugContext.GetInteger() >= 3 ) {
			// enable all the low priority messages
			qglDebugMessageControlARB( GL_DONT_CARE,
									GL_DONT_CARE,
									GL_DEBUG_SEVERITY_LOW_ARB,
									0, NULL, true );
		}
	}

	// GL_ARB_multitexture
	if ( !glConfig.multitextureAvailable ) {
		idLib::Error( "GL_ARB_multitexture not available" );
	}
	// GL_ARB_texture_compression + GL_EXT_texture_compression_s3tc
	if ( !glConfig.textureCompressionAvailable ) {
		idLib::Error( "GL_ARB_texture_compression or GL_EXT_texture_compression_s3tc not available" );
	}
	// GL_ARB_vertex_buffer_object
	if ( !glConfig.vertexBufferObjectAvailable ) {
		idLib::Error( "GL_ARB_vertex_buffer_object not available" );
	}
	// GL_ARB_map_buffer_range
	if ( !glConfig.mapBufferRangeAvailable ) {
		idLib::Error( "GL_ARB_map_buffer_range not available" );
	}
	// GL_ARB_vertex_array_object
	if ( !glConfig.vertexArrayObjectAvailable ) {
		idLib::Error( "GL_ARB_vertex_array_object not available" );
	}
	// GL_ARB_draw_elements_base_vertex
	if ( !glConfig.drawElementsBaseVertexAvailable ) {
		idLib::Error( "GL_ARB_draw_elements_base_vertex not available" );
	}
	// GL_ARB_vertex_program / GL_ARB_fragment_program
	if ( !glConfig.fragmentProgramAvailable ) {
		idLib::Error( "GL_ARB_fragment_program not available" );
	}
	// GLSL
	if ( !glConfig.glslAvailable ) {
		idLib::Error( "GLSL not available" );
	}
	// GL_ARB_uniform_buffer_object
	if ( !glConfig.uniformBufferAvailable ) {
		idLib::Error( "GL_ARB_uniform_buffer_object not available" );
	}
	// GL_EXT_stencil_two_side
	if ( !glConfig.twoSidedStencilAvailable ) {
		idLib::Error( "GL_ATI_separate_stencil not available" );
	}

	// generate one global Vertex Array Object (VAO)
	qglGenVertexArrays( 1, &glConfig.global_vao );
	qglBindVertexArray( glConfig.global_vao );

}



static bool r_initialized = false;

/*
=============================
R_IsInitialized
=============================
*/
bool R_IsInitialized() {
	return r_initialized;
}

/*
=============================
R_SetNewMode

r_fullScreen -1		borderless window at exact desktop coordinates
r_fullScreen 0		bordered window at exact desktop coordinates
r_fullScreen 1		fullscreen on monitor 1 at r_vidMode
r_fullScreen 2		fullscreen on monitor 2 at r_vidMode
...

r_vidMode -1		use r_customWidth / r_customHeight, even if they don't appear on the mode list
r_vidMode 0			use first mode returned by EnumDisplaySettings()
r_vidMode 1			use second mode returned by EnumDisplaySettings()
...

r_displayRefresh 0	don't specify refresh
r_displayRefresh 70	specify 70 hz, etc
=============================
*/
void R_SetNewMode( const bool fullInit ) {
	// try up to three different configurations

	for ( int i = 0 ; i < 3 ; i++ ) {
		if ( i == 0 && stereoRender_enable.GetInteger() != STEREO3D_QUAD_BUFFER ) {
			continue;		// don't even try for a stereo mode
		}

		glimpParms_t	parms;

		if ( r_fullscreen.GetInteger() <= 0 ) {
			// use explicit position / size for window
			parms.x = r_windowX.GetInteger();
			parms.y = r_windowY.GetInteger();
			parms.width = r_windowWidth.GetInteger();
			parms.height = r_windowHeight.GetInteger();
			// may still be -1 to force a borderless window
			parms.fullScreen = r_fullscreen.GetInteger();
			parms.displayHz = 0;		// ignored
		} else {
			// get the mode list for this monitor
			idList<vidMode_t> modeList;
			if ( !R_GetModeListForDisplay( r_fullscreen.GetInteger()-1, modeList ) ) {
				idLib::Printf( "r_fullscreen reset from %i to 1 because mode list failed.", r_fullscreen.GetInteger() );
				r_fullscreen.SetInteger( 1 );
				R_GetModeListForDisplay( r_fullscreen.GetInteger()-1, modeList );
			}
			if ( modeList.Num() < 1 ) {
				idLib::Printf( "Going to safe mode because mode list failed." );
				goto safeMode;
			}

			parms.x = 0;		// ignored
			parms.y = 0;		// ignored
			parms.fullScreen = r_fullscreen.GetInteger();

			// set the parameters we are trying
			if ( r_vidMode.GetInteger() < 0 ) {
				// try forcing a specific mode, even if it isn't on the list
				parms.width = r_customWidth.GetInteger();
				parms.height = r_customHeight.GetInteger();
				parms.displayHz = r_displayRefresh.GetInteger();
			} else {
				if ( r_vidMode.GetInteger() > modeList.Num() ) {
					idLib::Printf( "r_vidMode reset from %i to 0.\n", r_vidMode.GetInteger() );
					r_vidMode.SetInteger( 0 );
				}

				parms.width = modeList[ r_vidMode.GetInteger() ].width;
				parms.height = modeList[ r_vidMode.GetInteger() ].height;
				parms.displayHz = modeList[ r_vidMode.GetInteger() ].displayHz;
			}
		}

		parms.multiSamples = r_multiSamples.GetInteger();
		if ( i == 0 ) {
			parms.stereo = ( stereoRender_enable.GetInteger() == STEREO3D_QUAD_BUFFER );
		} else {
			parms.stereo = false;
		}

		if ( fullInit ) {
			// create the context as well as setting up the window
			if ( GLimp_Init( parms ) ) {
				// it worked
				break;
			}
		} else {
			// just rebuild the window
			if ( GLimp_SetScreenParms( parms ) ) {
				// it worked
				break;
			}
		}

		if ( i == 2 ) {
			common->FatalError( "Unable to initialize OpenGL" );
		}

		if ( i == 0 ) {
			// same settings, no stereo
			continue;
		}

safeMode:
		// if we failed, set everything back to "safe mode"
		// and try again
		r_vidMode.SetInteger( 0 );
		r_fullscreen.SetInteger( 1 );
		r_displayRefresh.SetInteger( 0 );
		r_multiSamples.SetInteger( 0 );
	}
}

idStr extensions_string;

/*
==================
R_InitOpenGL

This function is responsible for initializing a valid OpenGL subsystem
for rendering.  This is done by calling the system specific GLimp_Init,
which gives us a working OGL subsystem, then setting all necessary openGL
state, including images, vertex programs, and display lists.

Changes to the vertex cache size or smp state require a vid_restart.

If R_IsInitialized() is false, no rendering can take place, but
all renderSystem functions will still operate properly, notably the material
and model information functions.
==================
*/
void R_InitOpenGL() {

	common->Printf( "----- R_InitOpenGL -----\n" );

	if ( R_IsInitialized() ) {
		common->FatalError( "R_InitOpenGL called while active" );
	}

	R_SetNewMode( true );


	// input and sound systems need to be tied to the new window
	Sys_InitInput();

	// get our config strings
	glConfig.vendor_string = (const char *)qglGetString( GL_VENDOR );
	glConfig.renderer_string = (const char *)qglGetString( GL_RENDERER );
	glConfig.version_string = (const char *)qglGetString( GL_VERSION );
	glConfig.shading_language_string = (const char *)qglGetString( GL_SHADING_LANGUAGE_VERSION );
	glConfig.extensions_string = (const char *)qglGetString( GL_EXTENSIONS );

	if ( glConfig.extensions_string == NULL ) {
		// As of OpenGL 3.2, glGetStringi is required to obtain the available extensions
		qglGetStringi = (PFNGLGETSTRINGIPROC)GLimp_ExtensionPointer( "glGetStringi" );

		// Build the extensions string
		GLint numExtensions;
		qglGetIntegerv( GL_NUM_EXTENSIONS, &numExtensions );
		extensions_string.Clear();
		for ( int i = 0; i < numExtensions; i++ ) {
			extensions_string.Append( (const char*)qglGetStringi( GL_EXTENSIONS, i ) );
			// the now deprecated glGetString method usaed to create a single string with each extension separated by a space
			if ( i < numExtensions - 1 ) {
				extensions_string.Append( ' ' );
			}
		}
		glConfig.extensions_string = extensions_string.c_str();
	}


	float glVersion = atof( glConfig.version_string );
	float glslVersion = atof( glConfig.shading_language_string );
	idLib::Printf( "OpenGL Version: %3.1f\n", glVersion );
	idLib::Printf( "OpenGL Vendor : %s\n", glConfig.vendor_string );
	idLib::Printf( "OpenGL GLSL   : %3.1f\n", glslVersion );
	
	// OpenGL driver constants
	GLint temp;
	qglGetIntegerv( GL_MAX_TEXTURE_SIZE, &temp );
	glConfig.maxTextureSize = temp;

	// stubbed or broken drivers may have reported 0...
	if ( glConfig.maxTextureSize <= 0 ) {
		glConfig.maxTextureSize = 256;
	}

	r_initialized = true;

	// recheck all the extensions (FIXME: this might be dangerous)
	R_CheckPortableExtensions();

	renderProgManager.Init();

	r_initialized = true;

	// allocate the vertex array range or vertex objects
	vertexCache.Init();

	// allocate the frame data, which may be more if smp is enabled
	R_InitFrameData();

	// Reset our gamma
	R_SetColorMappings();

	static bool glCheck = false;
	if ( !glCheck && win32.osversion.dwMajorVersion == 6 ) {
		glCheck = true;
		if ( !idStr::Icmp( glConfig.vendor_string, "Microsoft" ) && idStr::FindText( glConfig.renderer_string, "OpenGL-D3D" ) != -1 ) {
			if ( cvarSystem->GetCVarBool( "r_fullscreen" ) ) {
				cmdSystem->BufferCommandText( CMD_EXEC_NOW, "vid_restart partial windowed\n" );
				Sys_GrabMouseCursor( false );
			}
			int ret = MessageBox( NULL, "Please install OpenGL drivers from your graphics hardware vendor to run " GAME_NAME ".\nYour OpenGL functionality is limited.",
				"Insufficient OpenGL capabilities", MB_OKCANCEL | MB_ICONWARNING | MB_TASKMODAL );
			if ( ret == IDCANCEL ) {
				cmdSystem->BufferCommandText( CMD_EXEC_APPEND, "quit\n" );
				cmdSystem->ExecuteCommandBuffer();
			}
			if ( cvarSystem->GetCVarBool( "r_fullscreen" ) ) {
				cmdSystem->BufferCommandText( CMD_EXEC_APPEND, "vid_restart\n" );
			}
		}
	}
}

/*
==================
GL_CheckErrors
==================
*/
void GL_CheckErrors() {
    int		err;
    char	s[64];
	int		i;

	// check for up to 10 errors pending
	for ( i = 0 ; i < 10 ; i++ ) {
		err = qglGetError();
		if ( err == GL_NO_ERROR ) {
			return;
		}
		switch( err ) {
			case GL_INVALID_ENUM:
				strcpy( s, "GL_INVALID_ENUM" );
				break;
			case GL_INVALID_VALUE:
				strcpy( s, "GL_INVALID_VALUE" );
				break;
			case GL_INVALID_OPERATION:
				strcpy( s, "GL_INVALID_OPERATION" );
				break;
			case GL_STACK_OVERFLOW:
				strcpy( s, "GL_STACK_OVERFLOW" );
				break;
			case GL_STACK_UNDERFLOW:
				strcpy( s, "GL_STACK_UNDERFLOW" );
				break;
			case GL_OUT_OF_MEMORY:
				strcpy( s, "GL_OUT_OF_MEMORY" );
				break;
			default:
				idStr::snPrintf( s, sizeof(s), "%i", err);
				break;
		}

		if ( !r_ignoreGLErrors.GetBool() ) {
			common->Printf( "GL_CheckErrors: %s\n", s );
		}
	}
}

/*
=====================
R_ReloadSurface_f

Reload the material displayed by r_showSurfaceInfo
=====================
*/
static void R_ReloadSurface_f( const idCmdArgs &args ) {
	modelTrace_t mt;
	idVec3 start, end;
	
	// start far enough away that we don't hit the player model
	start = tr.primaryView->renderView.vieworg + tr.primaryView->renderView.viewaxis[0] * 16;
	end = start + tr.primaryView->renderView.viewaxis[0] * 1000.0f;
	if ( !tr.primaryWorld->Trace( mt, start, end, 0.0f, false ) ) {
		return;
	}

	common->Printf( "Reloading %s\n", mt.material->GetName() );

	// reload the decl
	mt.material->base->Reload();

	// reload any images used by the decl
	mt.material->ReloadImages( false );
}

/*
==============
R_ListModes_f
==============
*/
static void R_ListModes_f( const idCmdArgs &args ) {
	for ( int displayNum = 0 ; ; displayNum++ ) {
		idList<vidMode_t> modeList;
		if ( !R_GetModeListForDisplay( displayNum, modeList ) ) {
			break;
		}
		for ( int i = 0; i < modeList.Num() ; i++ ) {
			common->Printf( "Monitor %i, mode %3i: %4i x %4i @ %ihz\n", displayNum+1, i, modeList[i].width, modeList[i].height, modeList[i].displayHz );
		}
	}
}

/*
=============
R_TestImage_f

Display the given image centered on the screen.
testimage <number>
testimage <filename>
=============
*/
void R_TestImage_f( const idCmdArgs &args ) {
	int imageNum;

	if ( tr.testVideo ) {
		delete tr.testVideo;
		tr.testVideo = NULL;
	}
	tr.testImage = NULL;

	if ( args.Argc() != 2 ) {
		return;
	}

	if ( idStr::IsNumeric( args.Argv(1) ) ) {
		imageNum = atoi( args.Argv(1) );
		if ( imageNum >= 0 && imageNum < globalImages->images.Num() ) {
			tr.testImage = globalImages->images[imageNum];
		}
	} else {
		tr.testImage = globalImages->ImageFromFile( args.Argv( 1 ), TF_DEFAULT, TR_REPEAT, TD_DEFAULT );
	}
}

/*
=============
R_TestVideo_f

Plays the cinematic file in a testImage
=============
*/
void R_TestVideo_f( const idCmdArgs &args ) {
	if ( tr.testVideo ) {
		delete tr.testVideo;
		tr.testVideo = NULL;
	}
	tr.testImage = NULL;

	if ( args.Argc() < 2 ) {
		return;
	}

	tr.testImage = globalImages->ImageFromFile( "_scratch", TF_DEFAULT, TR_REPEAT, TD_DEFAULT );
	tr.testVideo = idCinematic::Alloc();
	tr.testVideo->InitFromFile( args.Argv( 1 ), true );

	cinData_t	cin;
	cin = tr.testVideo->ImageForTime( 0 );
	if ( cin.imageY == NULL ) {
		delete tr.testVideo;
		tr.testVideo = NULL;
		tr.testImage = NULL;
		return;
	}

	common->Printf( "%i x %i images\n", cin.imageWidth, cin.imageHeight );

	int	len = tr.testVideo->AnimationLength();
	common->Printf( "%5.1f seconds of video\n", len * 0.001 );

	tr.testVideoStartTime = tr.primaryRenderView.time[1];

	// try to play the matching wav file
	idStr	wavString = args.Argv( ( args.Argc() == 2 ) ? 1 : 2 );
	wavString.StripFileExtension();
	wavString = wavString + ".wav";
	common->SW()->PlayShaderDirectly( wavString.c_str() );
}

static int R_QsortSurfaceAreas( const void *a, const void *b ) {
	const idMaterial	*ea, *eb;
	int	ac, bc;

	ea = *(idMaterial **)a;
	if ( !ea->EverReferenced() ) {
		ac = 0;
	} else {
		ac = ea->GetSurfaceArea();
	}
	eb = *(idMaterial **)b;
	if ( !eb->EverReferenced() ) {
		bc = 0;
	} else {
		bc = eb->GetSurfaceArea();
	}

	if ( ac < bc ) {
		return -1;
	}
	if ( ac > bc ) {
		return 1;
	}

	return idStr::Icmp( ea->GetName(), eb->GetName() );
}


/*
===================
R_ReportSurfaceAreas_f

Prints a list of the materials sorted by surface area
===================
*/
#pragma warning( disable: 6385 ) // This is simply to get pass a false defect for /analyze -- if you can figure out a better way, please let Shawn know...
void R_ReportSurfaceAreas_f( const idCmdArgs &args ) {
	unsigned int		i;
	idMaterial	**list;

	const unsigned int count = declManager->GetNumDecls( DECL_MATERIAL );
	if ( count == 0 ) {
		return;
	}

	list = (idMaterial **)_alloca( count * sizeof( *list ) );

	for ( i = 0 ; i < count ; i++ ) {
		list[i] = (idMaterial *)declManager->DeclByIndex( DECL_MATERIAL, i, false );
	}

	qsort( list, count, sizeof( list[0] ), R_QsortSurfaceAreas );

	// skip over ones with 0 area
	for ( i = 0 ; i < count ; i++ ) {
		if ( list[i]->GetSurfaceArea() > 0 ) {
			break;
		}
	}

	for ( ; i < count ; i++ ) {
		// report size in "editor blocks"
		int	blocks = list[i]->GetSurfaceArea() / 4096.0;
		common->Printf( "%7i %s\n", blocks, list[i]->GetName() );
	}
}
#pragma warning( default: 6385 )


/* 
============================================================================== 
 
						SCREEN SHOTS 
 
============================================================================== 
*/ 

/*
====================
R_ReadTiledPixels

NO LONGER SUPPORTED (FIXME: make standard case work)

Used to allow the rendering of an image larger than the actual window by
tiling it into window-sized chunks and rendering each chunk separately

If ref isn't specified, the full session UpdateScreen will be done.
====================
*/
void R_ReadTiledPixels( int width, int height, byte *buffer, renderView_t *ref = NULL ) {
	// include extra space for OpenGL padding to word boundaries
	int sysWidth = renderSystem->GetWidth();
	int sysHeight = renderSystem->GetHeight();
	byte * temp = (byte *)R_StaticAlloc( (sysWidth+3) * sysHeight * 3 );

	// disable scissor, so we don't need to adjust all those rects
	r_useScissor.SetBool( false );

	for ( int xo = 0 ; xo < width ; xo += sysWidth ) {
		for ( int yo = 0 ; yo < height ; yo += sysHeight ) {
			if ( ref ) {
				// discard anything currently on the list
				tr.SwapCommandBuffers( NULL, NULL, NULL, NULL );

				// build commands to render the scene
				tr.primaryWorld->RenderScene( ref );

				// finish off these commands
				const emptyCommand_t * cmd = tr.SwapCommandBuffers( NULL, NULL, NULL, NULL );

				// issue the commands to the GPU
				tr.RenderCommandBuffers( cmd );
			} else {
				const bool captureToImage = false;
				common->UpdateScreen( captureToImage );
			}

			int w = sysWidth;
			if ( xo + w > width ) {
				w = width - xo;
			}
			int h = sysHeight;
			if ( yo + h > height ) {
				h = height - yo;
			}

			qglReadBuffer( GL_FRONT );
			qglReadPixels( 0, 0, w, h, GL_RGB, GL_UNSIGNED_BYTE, temp ); 

			int	row = ( w * 3 + 3 ) & ~3;		// OpenGL pads to dword boundaries

			for ( int y = 0 ; y < h ; y++ ) {
				memcpy( buffer + ( ( yo + y )* width + xo ) * 3,
					temp + y * row, w * 3 );
			}
		}
	}

	r_useScissor.SetBool( true );

	R_StaticFree( temp );
}


/*
================== 
TakeScreenshot

Move to tr_imagefiles.c...

Downsample is the number of steps to mipmap the image before saving it
If ref == NULL, common->UpdateScreen will be used
================== 
*/  
void idRenderSystemLocal::TakeScreenshot( int width, int height, const char *fileName, int blends, renderView_t *ref ) {
	byte		*buffer;
	int			i, j, c, temp;

	takingScreenshot = true;

	const int pix = width * height;
	const int bufferSize = pix * 3 + 18;

	buffer = (byte *)R_StaticAlloc( bufferSize );
	memset( buffer, 0, bufferSize );

	if ( blends <= 1 ) {
		R_ReadTiledPixels( width, height, buffer + 18, ref );
	} else {
		unsigned short *shortBuffer = (unsigned short *)R_StaticAlloc(pix*2*3);
		memset (shortBuffer, 0, pix*2*3);

		// enable anti-aliasing jitter
		r_jitter.SetBool( true );

		for ( i = 0 ; i < blends ; i++ ) {
			R_ReadTiledPixels( width, height, buffer + 18, ref );

			for ( j = 0 ; j < pix*3 ; j++ ) {
				shortBuffer[j] += buffer[18+j];
			}
		}

		// divide back to bytes
		for ( i = 0 ; i < pix*3 ; i++ ) {
			buffer[18+i] = shortBuffer[i] / blends;
		}

		R_StaticFree( shortBuffer );
		r_jitter.SetBool( false );
	}

	// fill in the header (this is vertically flipped, which qglReadPixels emits)
	buffer[2] = 2;		// uncompressed type
	buffer[12] = width & 255;
	buffer[13] = width >> 8;
	buffer[14] = height & 255;
	buffer[15] = height >> 8;
	buffer[16] = 24;	// pixel size

	// swap rgb to bgr
	c = 18 + width * height * 3;
	for (i=18 ; i<c ; i+=3) {
		temp = buffer[i];
		buffer[i] = buffer[i+2];
		buffer[i+2] = temp;
	}

	fileSystem->WriteFile( fileName, buffer, c );

	R_StaticFree( buffer );

	takingScreenshot = false;
}

/* 
================== 
R_ScreenshotFilename

Returns a filename with digits appended
if we have saved a previous screenshot, don't scan
from the beginning, because recording demo avis can involve
thousands of shots
================== 
*/  
void R_ScreenshotFilename( int &lastNumber, const char *base, idStr &fileName ) {
	int	a,b,c,d, e;

	bool restrict = cvarSystem->GetCVarBool( "fs_restrict" );
	cvarSystem->SetCVarBool( "fs_restrict", false );

	lastNumber++;
	if ( lastNumber > 99999 ) {
		lastNumber = 99999;
	}
	for ( ; lastNumber < 99999 ; lastNumber++ ) {
		int	frac = lastNumber;

		a = frac / 10000;
		frac -= a*10000;
		b = frac / 1000;
		frac -= b*1000;
		c = frac / 100;
		frac -= c*100;
		d = frac / 10;
		frac -= d*10;
		e = frac;

		sprintf( fileName, "%s%i%i%i%i%i.tga", base, a, b, c, d, e );
		if ( lastNumber == 99999 ) {
			break;
		}
		int len = fileSystem->ReadFile( fileName, NULL, NULL );
		if ( len <= 0 ) {
			break;
		}
		// check again...
	}
	cvarSystem->SetCVarBool( "fs_restrict", restrict );
}

/*
================== 
R_BlendedScreenShot

screenshot
screenshot [filename]
screenshot [width] [height]
screenshot [width] [height] [samples]
================== 
*/ 
#define	MAX_BLENDS	256	// to keep the accumulation in shorts
void R_ScreenShot_f( const idCmdArgs &args ) {
	static int lastNumber = 0;
	idStr checkname;

	int width = renderSystem->GetWidth();
	int height = renderSystem->GetHeight();
	int	blends = 0;

	switch ( args.Argc() ) {
	case 1:
		width = renderSystem->GetWidth();
		height = renderSystem->GetHeight();
		blends = 1;
		R_ScreenshotFilename( lastNumber, "screenshots/shot", checkname );
		break;
	case 2:
		width = renderSystem->GetWidth();
		height = renderSystem->GetHeight();
		blends = 1;
		checkname = args.Argv( 1 );
		break;
	case 3:
		width = atoi( args.Argv( 1 ) );
		height = atoi( args.Argv( 2 ) );
		blends = 1;
		R_ScreenshotFilename( lastNumber, "screenshots/shot", checkname );
		break;
	case 4:
		width = atoi( args.Argv( 1 ) );
		height = atoi( args.Argv( 2 ) );
		blends = atoi( args.Argv( 3 ) );
		if ( blends < 1 ) {
			blends = 1;
		}
		if ( blends > MAX_BLENDS ) {
			blends = MAX_BLENDS;
		}
		R_ScreenshotFilename( lastNumber, "screenshots/shot", checkname );
		break;
	default:
		common->Printf( "usage: screenshot\n       screenshot <filename>\n       screenshot <width> <height>\n       screenshot <width> <height> <blends>\n" );
		return;
	}

	// put the console away
	console->Close();

	tr.TakeScreenshot( width, height, checkname, blends, NULL );

	common->Printf( "Wrote %s\n", checkname.c_str() );
}

/*
===============
R_StencilShot
Save out a screenshot showing the stencil buffer expanded by 16x range
===============
*/
void R_StencilShot() {
	int			i, c;

	int	width = tr.GetWidth();
	int	height = tr.GetHeight();

	int	pix = width * height;

	c = pix * 3 + 18;
	idTempArray< byte > buffer( c );
	memset( buffer.Ptr(), 0, 18 );

	idTempArray< byte > byteBuffer( pix );

	qglReadPixels( 0, 0, width, height, GL_STENCIL_INDEX , GL_UNSIGNED_BYTE, byteBuffer.Ptr() ); 

	for ( i = 0 ; i < pix ; i++ ) {
		buffer[18+i*3] =
		buffer[18+i*3+1] =
			//		buffer[18+i*3+2] = ( byteBuffer[i] & 15 ) * 16;
		buffer[18+i*3+2] = byteBuffer[i];
	}

	// fill in the header (this is vertically flipped, which qglReadPixels emits)
	buffer[2] = 2;		// uncompressed type
	buffer[12] = width & 255;
	buffer[13] = width >> 8;
	buffer[14] = height & 255;
	buffer[15] = height >> 8;
	buffer[16] = 24;	// pixel size

	fileSystem->WriteFile( "screenshots/stencilShot.tga", buffer.Ptr(), c, "fs_savepath" );
}


//============================================================================

static idMat3		cubeAxis[6];


/*
==================
R_SampleCubeMap
==================
*/
void R_SampleCubeMap( const idVec3 &dir, int size, byte *buffers[6], byte result[4] ) {
	float	adir[3];
	int		axis, x, y;

	adir[0] = fabs(dir[0]);
	adir[1] = fabs(dir[1]);
	adir[2] = fabs(dir[2]);

	if ( dir[0] >= adir[1] && dir[0] >= adir[2] ) {
		axis = 0;
	} else if ( -dir[0] >= adir[1] && -dir[0] >= adir[2] ) {
		axis = 1;
	} else if ( dir[1] >= adir[0] && dir[1] >= adir[2] ) {
		axis = 2;
	} else if ( -dir[1] >= adir[0] && -dir[1] >= adir[2] ) {
		axis = 3;
	} else if ( dir[2] >= adir[1] && dir[2] >= adir[2] ) {
		axis = 4;
	} else {
		axis = 5;
	}

	float	fx = (dir * cubeAxis[axis][1]) / (dir * cubeAxis[axis][0]);
	float	fy = (dir * cubeAxis[axis][2]) / (dir * cubeAxis[axis][0]);

	fx = -fx;
	fy = -fy;
	x = size * 0.5 * (fx + 1);
	y = size * 0.5 * (fy + 1);
	if ( x < 0 ) {
		x = 0;
	} else if ( x >= size ) {
		x = size-1;
	}
	if ( y < 0 ) {
		y = 0;
	} else if ( y >= size ) {
		y = size-1;
	}

	result[0] = buffers[axis][(y*size+x)*4+0];
	result[1] = buffers[axis][(y*size+x)*4+1];
	result[2] = buffers[axis][(y*size+x)*4+2];
	result[3] = buffers[axis][(y*size+x)*4+3];
}

/* 
================== 
R_MakeAmbientMap_f

R_MakeAmbientMap_f <basename> [size]

Saves out env/<basename>_amb_ft.tga, etc
================== 
*/  
void R_MakeAmbientMap_f( const idCmdArgs &args ) {
	idStr fullname;
	const char	*baseName;
	int			i;
	renderView_t	ref;
	viewDef_t	primary;
	int			downSample;
	char	*extensions[6] =  { "_px.tga", "_nx.tga", "_py.tga", "_ny.tga", 
		"_pz.tga", "_nz.tga" };
	int			outSize;
	byte		*buffers[6];
	int			width = 0, height = 0;

	if ( args.Argc() != 2 && args.Argc() != 3 ) {
		common->Printf( "USAGE: ambientshot <basename> [size]\n" );
		return;
	}
	baseName = args.Argv( 1 );

	downSample = 0;
	if ( args.Argc() == 3 ) {
		outSize = atoi( args.Argv( 2 ) );
	} else {
		outSize = 32;
	}

	memset( &cubeAxis, 0, sizeof( cubeAxis ) );
	cubeAxis[0][0][0] = 1;
	cubeAxis[0][1][2] = 1;
	cubeAxis[0][2][1] = 1;

	cubeAxis[1][0][0] = -1;
	cubeAxis[1][1][2] = -1;
	cubeAxis[1][2][1] = 1;

	cubeAxis[2][0][1] = 1;
	cubeAxis[2][1][0] = -1;
	cubeAxis[2][2][2] = -1;

	cubeAxis[3][0][1] = -1;
	cubeAxis[3][1][0] = -1;
	cubeAxis[3][2][2] = 1;

	cubeAxis[4][0][2] = 1;
	cubeAxis[4][1][0] = -1;
	cubeAxis[4][2][1] = 1;

	cubeAxis[5][0][2] = -1;
	cubeAxis[5][1][0] = 1;
	cubeAxis[5][2][1] = 1;

	// read all of the images
	for ( i = 0 ; i < 6 ; i++ ) {
		sprintf( fullname, "env/%s%s", baseName, extensions[i] );
		common->Printf( "loading %s\n", fullname.c_str() );
		const bool captureToImage = false;
		common->UpdateScreen( captureToImage );
		R_LoadImage( fullname, &buffers[i], &width, &height, NULL, true );
		if ( !buffers[i] ) {
			common->Printf( "failed.\n" );
			for ( i-- ; i >= 0 ; i-- ) {
				Mem_Free( buffers[i] );
			}
			return;
		}
	}

	// resample with hemispherical blending
	int	samples = 1000;

	byte	*outBuffer = (byte *)_alloca( outSize * outSize * 4 );

	for ( int map = 0 ; map < 2 ; map++ ) {
		for ( i = 0 ; i < 6 ; i++ ) {
			for ( int x = 0 ; x < outSize ; x++ ) {
				for ( int y = 0 ; y < outSize ; y++ ) {
					idVec3	dir;
					float	total[3];

					dir = cubeAxis[i][0] + -( -1 + 2.0*x/(outSize-1) ) * cubeAxis[i][1] + -( -1 + 2.0*y/(outSize-1) ) * cubeAxis[i][2];
					dir.Normalize();
					total[0] = total[1] = total[2] = 0;
	//samples = 1;
					float	limit = map ? 0.95 : 0.25;		// small for specular, almost hemisphere for ambient

					for ( int s = 0 ; s < samples ; s++ ) {
						// pick a random direction vector that is inside the unit sphere but not behind dir,
						// which is a robust way to evenly sample a hemisphere
						idVec3	test;
						while( 1 ) {
							for ( int j = 0 ; j < 3 ; j++ ) {
								test[j] = -1 + 2 * (rand()&0x7fff)/(float)0x7fff;
							}
							if ( test.Length() > 1.0 ) {
								continue;
							}
							test.Normalize();
							if ( test * dir > limit ) {	// don't do a complete hemisphere
								break;
							}
						}
						byte	result[4];
	//test = dir;
						R_SampleCubeMap( test, width, buffers, result );
						total[0] += result[0];
						total[1] += result[1];
						total[2] += result[2];
					}
					outBuffer[(y*outSize+x)*4+0] = total[0] / samples;
					outBuffer[(y*outSize+x)*4+1] = total[1] / samples;
					outBuffer[(y*outSize+x)*4+2] = total[2] / samples;
					outBuffer[(y*outSize+x)*4+3] = 255;
				}
			}

			if ( map == 0 ) {
				sprintf( fullname, "env/%s_amb%s", baseName, extensions[i] );
			} else {
				sprintf( fullname, "env/%s_spec%s", baseName, extensions[i] );
			}
			common->Printf( "writing %s\n", fullname.c_str() );
			const bool captureToImage = false;
			common->UpdateScreen( captureToImage );
			R_WriteTGA( fullname, outBuffer, outSize, outSize );
		}
	}

	for ( i = 0 ; i < 6 ; i++ ) {
		if ( buffers[i] ) {
			Mem_Free( buffers[i] );
		}
	}
} 

//============================================================================


/*
===============
R_SetColorMappings
===============
*/
void R_SetColorMappings() {
	float b = r_brightness.GetFloat();
	float invg = 1.0f / r_gamma.GetFloat();

	float j = 0.0f;
	for ( int i = 0; i < 256; i++, j += b ) {
		int inf = idMath::Ftoi( 0xffff * pow( j / 255.0f, invg ) + 0.5f );
		tr.gammaTable[i] = idMath::ClampInt( 0, 0xFFFF, inf );
	}

	GLimp_SetGamma( tr.gammaTable, tr.gammaTable, tr.gammaTable );
}

/*
================
GfxInfo_f
================
*/
void GfxInfo_f( const idCmdArgs &args ) {
	common->Printf( "CPU: %s\n", Sys_GetProcessorString() );

	const char *fsstrings[] =
	{
		"windowed",
		"fullscreen"
	};

	common->Printf( "\nGL_VENDOR: %s\n", glConfig.vendor_string );
	common->Printf( "GL_RENDERER: %s\n", glConfig.renderer_string );
	common->Printf( "GL_VERSION: %s\n", glConfig.version_string );
	common->Printf( "GL_EXTENSIONS: %s\n", glConfig.extensions_string );
	if ( glConfig.wgl_extensions_string ) {
		common->Printf( "WGL_EXTENSIONS: %s\n", glConfig.wgl_extensions_string );
	}
	common->Printf( "GL_MAX_TEXTURE_SIZE: %d\n", glConfig.maxTextureSize );
	common->Printf( "GL_MAX_TEXTURE_COORDS_ARB: %d\n", glConfig.maxTextureCoords );
	common->Printf( "GL_MAX_TEXTURE_IMAGE_UNITS_ARB: %d\n", glConfig.maxTextureImageUnits );

	// print all the display adapters, monitors, and video modes
	void DumpAllDisplayDevices();
	DumpAllDisplayDevices();

	common->Printf( "\nPIXELFORMAT: color(%d-bits) Z(%d-bit) stencil(%d-bits)\n", glConfig.colorBits, glConfig.depthBits, glConfig.stencilBits );
	common->Printf( "MODE: %d, %d x %d %s hz:", r_vidMode.GetInteger(), renderSystem->GetWidth(), renderSystem->GetHeight(), fsstrings[r_fullscreen.GetBool()] );
	if ( glConfig.displayFrequency ) {
		common->Printf( "%d\n", glConfig.displayFrequency );
	} else {
		common->Printf( "N/A\n" );
	}

	common->Printf( "-------\n" );

	// WGL_EXT_swap_interval
	typedef BOOL (WINAPI * PFNWGLSWAPINTERVALEXTPROC) (int interval);
	extern	PFNWGLSWAPINTERVALEXTPROC wglSwapIntervalEXT;

	if ( r_swapInterval.GetInteger() && wglSwapIntervalEXT != NULL ) {
		common->Printf( "Forcing swapInterval %i\n", r_swapInterval.GetInteger() );
	} else {
		common->Printf( "swapInterval not forced\n" );
	}

	if ( glConfig.stereoPixelFormatAvailable && glConfig.isStereoPixelFormat ) {
		idLib::Printf( "OpenGl quad buffer stereo pixel format active\n" );
	} else if ( glConfig.stereoPixelFormatAvailable ) {
		idLib::Printf( "OpenGl quad buffer stereo pixel available but not selected\n" );
	} else {
		idLib::Printf( "OpenGl quad buffer stereo pixel format not available\n" );
	}

	idLib::Printf( "Stereo mode: " );
	switch ( renderSystem->GetStereo3DMode() ) {
		case STEREO3D_OFF:						idLib::Printf( "STEREO3D_OFF\n" ); break;
		case STEREO3D_SIDE_BY_SIDE_COMPRESSED:	idLib::Printf( "STEREO3D_SIDE_BY_SIDE_COMPRESSED\n" ); break;
		case STEREO3D_TOP_AND_BOTTOM_COMPRESSED:idLib::Printf( "STEREO3D_TOP_AND_BOTTOM_COMPRESSED\n" ); break;
		case STEREO3D_SIDE_BY_SIDE:				idLib::Printf( "STEREO3D_SIDE_BY_SIDE\n" ); break;
		case STEREO3D_HDMI_720:					idLib::Printf( "STEREO3D_HDMI_720\n" ); break;
		case STEREO3D_INTERLACED:				idLib::Printf( "STEREO3D_INTERLACED\n" ); break;
		case STEREO3D_QUAD_BUFFER:				idLib::Printf( "STEREO3D_QUAD_BUFFER\n" ); break;
		default:idLib::Printf( "Unknown (%i)\n", renderSystem->GetStereo3DMode() ); break;
	}

	idLib::Printf( "%i multisamples\n", glConfig.multisamples );

	common->Printf( "%5.1f cm screen width (%4.1f\" diagonal)\n",
		glConfig.physicalScreenWidthInCentimeters, glConfig.physicalScreenWidthInCentimeters / 2.54f
			* sqrt( (float)(16*16 + 9*9) ) / 16.0f );
	extern idCVar r_forceScreenWidthCentimeters;
	if ( r_forceScreenWidthCentimeters.GetFloat() ) {
		common->Printf( "screen size manually forced to %5.1f cm width (%4.1f\" diagonal)\n",
			renderSystem->GetPhysicalScreenWidthInCentimeters(), renderSystem->GetPhysicalScreenWidthInCentimeters() / 2.54f
				* sqrt( (float)(16*16 + 9*9) ) / 16.0f );
	}
}

/*
=================
R_VidRestart_f
=================
*/
void R_VidRestart_f( const idCmdArgs &args ) {
	// if OpenGL isn't started, do nothing
	if ( !R_IsInitialized() ) {
		return;
	}

	// set the mode without re-initializing the context
	R_SetNewMode( false );

#if 0
	bool full = true;
	bool forceWindow = false;
	for ( int i = 1 ; i < args.Argc() ; i++ ) {
		if ( idStr::Icmp( args.Argv( i ), "partial" ) == 0 ) {
			full = false;
			continue;
		}
		if ( idStr::Icmp( args.Argv( i ), "windowed" ) == 0 ) {
			forceWindow = true;
			continue;
		}
	}

	// this could take a while, so give them the cursor back ASAP
	Sys_GrabMouseCursor( false );

	// dump ambient caches
	renderModelManager->FreeModelVertexCaches();

	// free any current world interaction surfaces and vertex caches
	R_FreeDerivedData();

	// make sure the defered frees are actually freed
	R_ToggleSmpFrame();
	R_ToggleSmpFrame();

	// free the vertex caches so they will be regenerated again
	vertexCache.PurgeAll();

	// sound and input are tied to the window we are about to destroy

	if ( full ) {
		// free all of our texture numbers
		Sys_ShutdownInput();
		globalImages->PurgeAllImages();
		// free the context and close the window
		GLimp_Shutdown();
		r_initialized = false;

		// create the new context and vertex cache
		bool latch = cvarSystem->GetCVarBool( "r_fullscreen" );
		if ( forceWindow ) {
			cvarSystem->SetCVarBool( "r_fullscreen", false );
		}
		R_InitOpenGL();
		cvarSystem->SetCVarBool( "r_fullscreen", latch );

		// regenerate all images
		globalImages->ReloadImages( true );
	} else {
		glimpParms_t parms;
		parms.width = glConfig.nativeScreenWidth;
		parms.height = glConfig.nativeScreenHeight;
		parms.fullScreen = ( forceWindow ) ? false : r_fullscreen.GetInteger();
		parms.displayHz = r_displayRefresh.GetInteger();
		parms.multiSamples = r_multiSamples.GetInteger();
		parms.stereo = false;
		GLimp_SetScreenParms( parms );
	}



	// make sure the regeneration doesn't use anything no longer valid
	tr.viewCount++;
	tr.viewDef = NULL;

	// check for problems
	int err = qglGetError();
	if ( err != GL_NO_ERROR ) {
		common->Printf( "glGetError() = 0x%x\n", err );
	}
#endif

}

/*
=================
R_InitMaterials
=================
*/
void R_InitMaterials() {
	tr.defaultMaterial = declManager->FindMaterial( "_default", false );
	if ( !tr.defaultMaterial ) {
		common->FatalError( "_default material not found" );
	}
	tr.defaultPointLight = declManager->FindMaterial( "lights/defaultPointLight" );
	tr.defaultProjectedLight = declManager->FindMaterial( "lights/defaultProjectedLight" );
	tr.whiteMaterial = declManager->FindMaterial( "_white" );
	tr.charSetMaterial = declManager->FindMaterial( "textures/bigchars" );
}


/*
=================
R_SizeUp_f

Keybinding command
=================
*/
static void R_SizeUp_f( const idCmdArgs &args ) {
	if ( r_screenFraction.GetInteger() + 10 > 100 ) {
		r_screenFraction.SetInteger( 100 );
	} else {
		r_screenFraction.SetInteger( r_screenFraction.GetInteger() + 10 );
	}
}


/*
=================
R_SizeDown_f

Keybinding command
=================
*/
static void R_SizeDown_f( const idCmdArgs &args ) {
	if ( r_screenFraction.GetInteger() - 10 < 10 ) {
		r_screenFraction.SetInteger( 10 );
	} else {
		r_screenFraction.SetInteger( r_screenFraction.GetInteger() - 10 );
	}
}


/*
===============
TouchGui_f

  this is called from the main thread
===============
*/
void R_TouchGui_f( const idCmdArgs &args ) {
	const char	*gui = args.Argv( 1 );

	if ( !gui[0] ) {
		common->Printf( "USAGE: touchGui <guiName>\n" );
		return;
	}

	common->Printf( "touchGui %s\n", gui );
	const bool captureToImage = false;
	common->UpdateScreen( captureToImage );
	uiManager->Touch( gui );
}

/*
=================
R_InitCvars
=================
*/
void R_InitCvars() {
	// update latched cvars here
}

/*
=================
R_InitCommands
=================
*/
void R_InitCommands() {
	cmdSystem->AddCommand( "sizeUp", R_SizeUp_f, CMD_FL_RENDERER, "makes the rendered view larger" );
	cmdSystem->AddCommand( "sizeDown", R_SizeDown_f, CMD_FL_RENDERER, "makes the rendered view smaller" );
	cmdSystem->AddCommand( "reloadGuis", R_ReloadGuis_f, CMD_FL_RENDERER, "reloads guis" );
	cmdSystem->AddCommand( "listGuis", R_ListGuis_f, CMD_FL_RENDERER, "lists guis" );
	cmdSystem->AddCommand( "touchGui", R_TouchGui_f, CMD_FL_RENDERER, "touches a gui" );
	cmdSystem->AddCommand( "screenshot", R_ScreenShot_f, CMD_FL_RENDERER, "takes a screenshot" );
	cmdSystem->AddCommand( "makeAmbientMap", R_MakeAmbientMap_f, CMD_FL_RENDERER|CMD_FL_CHEAT, "makes an ambient map" );
	cmdSystem->AddCommand( "gfxInfo", GfxInfo_f, CMD_FL_RENDERER, "show graphics info" );
	cmdSystem->AddCommand( "modulateLights", R_ModulateLights_f, CMD_FL_RENDERER | CMD_FL_CHEAT, "modifies shader parms on all lights" );
	cmdSystem->AddCommand( "testImage", R_TestImage_f, CMD_FL_RENDERER | CMD_FL_CHEAT, "displays the given image centered on screen", idCmdSystem::ArgCompletion_ImageName );
	cmdSystem->AddCommand( "testVideo", R_TestVideo_f, CMD_FL_RENDERER | CMD_FL_CHEAT, "displays the given cinematic", idCmdSystem::ArgCompletion_VideoName );
	cmdSystem->AddCommand( "reportSurfaceAreas", R_ReportSurfaceAreas_f, CMD_FL_RENDERER, "lists all used materials sorted by surface area" );
	cmdSystem->AddCommand( "showInteractionMemory", R_ShowInteractionMemory_f, CMD_FL_RENDERER, "shows memory used by interactions" );
	cmdSystem->AddCommand( "vid_restart", R_VidRestart_f, CMD_FL_RENDERER, "restarts renderSystem" );
	cmdSystem->AddCommand( "listRenderEntityDefs", R_ListRenderEntityDefs_f, CMD_FL_RENDERER, "lists the entity defs" );
	cmdSystem->AddCommand( "listRenderLightDefs", R_ListRenderLightDefs_f, CMD_FL_RENDERER, "lists the light defs" );
	cmdSystem->AddCommand( "listModes", R_ListModes_f, CMD_FL_RENDERER, "lists all video modes" );
	cmdSystem->AddCommand( "reloadSurface", R_ReloadSurface_f, CMD_FL_RENDERER, "reloads the decl and images for selected surface" );
}

/*
===============
idRenderSystemLocal::Clear
===============
*/
void idRenderSystemLocal::Clear() {
	registered = false;
	frameCount = 0;
	viewCount = 0;
	frameShaderTime = 0.0f;
	ambientLightVector.Zero();
	worlds.Clear();
	primaryWorld = NULL;
	memset( &primaryRenderView, 0, sizeof( primaryRenderView ) );
	primaryView = NULL;
	defaultMaterial = NULL;
	testImage = NULL;
	ambientCubeImage = NULL;
	viewDef = NULL;
	memset( &pc, 0, sizeof( pc ) );
	memset( &identitySpace, 0, sizeof( identitySpace ) );
	memset( renderCrops, 0, sizeof( renderCrops ) );
	currentRenderCrop = 0;
	currentColorNativeBytesOrder = 0xFFFFFFFF;
	currentGLState = 0;
	guiRecursionLevel = 0;
	guiModel = NULL;
	memset( gammaTable, 0, sizeof( gammaTable ) );
	takingScreenshot = false;

	if ( unitSquareTriangles != NULL ) {
		Mem_Free( unitSquareTriangles );
		unitSquareTriangles = NULL;
	}

	if ( zeroOneCubeTriangles != NULL ) {
		Mem_Free( zeroOneCubeTriangles );
		zeroOneCubeTriangles = NULL;
	}

	if ( testImageTriangles != NULL ) {
		Mem_Free( testImageTriangles );
		testImageTriangles = NULL;
	}

	frontEndJobList = NULL;
}

/*
=============
R_MakeFullScreenTris
=============
*/
static srfTriangles_t * R_MakeFullScreenTris() {
	// copy verts and indexes
	srfTriangles_t * tri = (srfTriangles_t *)Mem_ClearedAlloc( sizeof( *tri ), TAG_RENDER_TOOLS );

	tri->numIndexes = 6;
	tri->numVerts = 4;

	int indexSize = tri->numIndexes * sizeof( tri->indexes[0] );
	int allocatedIndexBytes = ALIGN( indexSize, 16 );
	tri->indexes = (triIndex_t *)Mem_Alloc( allocatedIndexBytes, TAG_RENDER_TOOLS );

	int vertexSize = tri->numVerts * sizeof( tri->verts[0] );
	int allocatedVertexBytes =  ALIGN( vertexSize, 16 );
	tri->verts = (idDrawVert *)Mem_ClearedAlloc( allocatedVertexBytes, TAG_RENDER_TOOLS );

	idDrawVert * verts = tri->verts;

	triIndex_t tempIndexes[6] = { 3, 0, 2, 2, 0, 1 };
	memcpy( tri->indexes, tempIndexes, indexSize );
	
	verts[0].xyz[0] = -1.0f;
	verts[0].xyz[1] = 1.0f;
	verts[0].SetTexCoord( 0.0f, 1.0f );

	verts[1].xyz[0] = 1.0f;
	verts[1].xyz[1] = 1.0f;
	verts[1].SetTexCoord( 1.0f, 1.0f );

	verts[2].xyz[0] = 1.0f;
	verts[2].xyz[1] = -1.0f;
	verts[2].SetTexCoord( 1.0f, 0.0f );

	verts[3].xyz[0] = -1.0f;
	verts[3].xyz[1] = -1.0f;
	verts[3].SetTexCoord( 0.0f, 0.0f );

	for ( int i = 0 ; i < 4 ; i++ ) {
		verts[i].SetColor( 0xffffffff );
	}


	return tri;
}

/*
=============
R_MakeZeroOneCubeTris
=============
*/
static srfTriangles_t * R_MakeZeroOneCubeTris() {
	srfTriangles_t * tri = (srfTriangles_t *)Mem_ClearedAlloc( sizeof( *tri ), TAG_RENDER_TOOLS );

	tri->numVerts = 8;
	tri->numIndexes = 36;

	const int indexSize = tri->numIndexes * sizeof( tri->indexes[0] );
	const int allocatedIndexBytes = ALIGN( indexSize, 16 );
	tri->indexes = (triIndex_t *)Mem_Alloc( allocatedIndexBytes, TAG_RENDER_TOOLS );

	const int vertexSize = tri->numVerts * sizeof( tri->verts[0] );
	const int allocatedVertexBytes =  ALIGN( vertexSize, 16 );
	tri->verts = (idDrawVert *)Mem_ClearedAlloc( allocatedVertexBytes, TAG_RENDER_TOOLS );

	idDrawVert * verts = tri->verts;

	const float low = 0.0f;
	const float high = 1.0f;

	idVec3 center( 0.0f );
	idVec3 mx(  low, 0.0f, 0.0f );
	idVec3 px( high, 0.0f, 0.0f );
	idVec3 my( 0.0f,  low, 0.0f );
	idVec3 py( 0.0f, high, 0.0f );
	idVec3 mz( 0.0f, 0.0f,  low );
	idVec3 pz( 0.0f, 0.0f, high );

	verts[0].xyz = center + mx + my + mz;
	verts[1].xyz = center + px + my + mz;
	verts[2].xyz = center + px + py + mz;
	verts[3].xyz = center + mx + py + mz;
	verts[4].xyz = center + mx + my + pz;
	verts[5].xyz = center + px + my + pz;
	verts[6].xyz = center + px + py + pz;
	verts[7].xyz = center + mx + py + pz;

	// bottom
	tri->indexes[ 0*3+0] = 2;
	tri->indexes[ 0*3+1] = 3;
	tri->indexes[ 0*3+2] = 0;
	tri->indexes[ 1*3+0] = 1;
	tri->indexes[ 1*3+1] = 2;
	tri->indexes[ 1*3+2] = 0;
	// back
	tri->indexes[ 2*3+0] = 5;
	tri->indexes[ 2*3+1] = 1;
	tri->indexes[ 2*3+2] = 0;
	tri->indexes[ 3*3+0] = 4;
	tri->indexes[ 3*3+1] = 5;
	tri->indexes[ 3*3+2] = 0;
	// left
	tri->indexes[ 4*3+0] = 7;
	tri->indexes[ 4*3+1] = 4;
	tri->indexes[ 4*3+2] = 0;
	tri->indexes[ 5*3+0] = 3;
	tri->indexes[ 5*3+1] = 7;
	tri->indexes[ 5*3+2] = 0;
	// right
	tri->indexes[ 6*3+0] = 1;
	tri->indexes[ 6*3+1] = 5;
	tri->indexes[ 6*3+2] = 6;
	tri->indexes[ 7*3+0] = 2;
	tri->indexes[ 7*3+1] = 1;
	tri->indexes[ 7*3+2] = 6;
	// front
	tri->indexes[ 8*3+0] = 3;
	tri->indexes[ 8*3+1] = 2;
	tri->indexes[ 8*3+2] = 6;
	tri->indexes[ 9*3+0] = 7;
	tri->indexes[ 9*3+1] = 3;
	tri->indexes[ 9*3+2] = 6;
	// top
	tri->indexes[10*3+0] = 4;
	tri->indexes[10*3+1] = 7;
	tri->indexes[10*3+2] = 6;
	tri->indexes[11*3+0] = 5;
	tri->indexes[11*3+1] = 4;
	tri->indexes[11*3+2] = 6;

	for ( int i = 0 ; i < 4 ; i++ ) {
		verts[i].SetColor( 0xffffffff );
	}

	return tri;
}

/*
================
R_MakeTestImageTriangles

Initializes the Test Image Triangles
================
*/
srfTriangles_t* R_MakeTestImageTriangles() {
	srfTriangles_t * tri = (srfTriangles_t *)Mem_ClearedAlloc( sizeof( *tri ), TAG_RENDER_TOOLS );

	tri->numIndexes = 6;
	tri->numVerts = 4;

	int indexSize = tri->numIndexes * sizeof( tri->indexes[0] );
	int allocatedIndexBytes = ALIGN( indexSize, 16 );
	tri->indexes = (triIndex_t *)Mem_Alloc( allocatedIndexBytes, TAG_RENDER_TOOLS );

	int vertexSize = tri->numVerts * sizeof( tri->verts[0] );
	int allocatedVertexBytes =  ALIGN( vertexSize, 16 );
	tri->verts = (idDrawVert *)Mem_ClearedAlloc( allocatedVertexBytes, TAG_RENDER_TOOLS );

	ALIGNTYPE16 triIndex_t tempIndexes[6] = { 3, 0, 2, 2, 0, 1 };
	memcpy( tri->indexes, tempIndexes, indexSize );

	idDrawVert* tempVerts = tri->verts;
	tempVerts[0].xyz[0] = 0.0f;
	tempVerts[0].xyz[1] = 0.0f;
	tempVerts[0].xyz[2] = 0;
	tempVerts[0].SetTexCoord( 0.0, 0.0f );

	tempVerts[1].xyz[0] = 1.0f;
	tempVerts[1].xyz[1] = 0.0f;
	tempVerts[1].xyz[2] = 0;
	tempVerts[1].SetTexCoord( 1.0f, 0.0f );

	tempVerts[2].xyz[0] = 1.0f;
	tempVerts[2].xyz[1] = 1.0f;
	tempVerts[2].xyz[2] = 0;
	tempVerts[2].SetTexCoord( 1.0f, 1.0f );

	tempVerts[3].xyz[0] = 0.0f;
	tempVerts[3].xyz[1] = 1.0f;
	tempVerts[3].xyz[2] = 0;
	tempVerts[3].SetTexCoord( 0.0f, 1.0f );

	for ( int i = 0; i < 4; i++ ) {
		tempVerts[i].SetColor( 0xFFFFFFFF );
	}
	return tri;
}

/*
===============
idRenderSystemLocal::Init
===============
*/
void idRenderSystemLocal::Init() {	

	common->Printf( "------- Initializing renderSystem --------\n" );

	// clear all our internal state
	viewCount = 1;		// so cleared structures never match viewCount
	// we used to memset tr, but now that it is a class, we can't, so
	// there may be other state we need to reset

	ambientLightVector[0] = 0.5f;
	ambientLightVector[1] = 0.5f - 0.385f;
	ambientLightVector[2] = 0.8925f;
	ambientLightVector[3] = 1.0f;

	memset( &backEnd, 0, sizeof( backEnd ) );

	R_InitCvars();

	R_InitCommands();

	guiModel = new (TAG_RENDER) idGuiModel;
	guiModel->Clear();
	tr_guiModel = guiModel;	// for DeviceContext fast path

	globalImages->Init();

	idCinematic::InitCinematic( );

	// build brightness translation tables
	R_SetColorMappings();

	R_InitMaterials();

	renderModelManager->Init();

	// set the identity space
	identitySpace.modelMatrix[0*4+0] = 1.0f;
	identitySpace.modelMatrix[1*4+1] = 1.0f;
	identitySpace.modelMatrix[2*4+2] = 1.0f;

	// make sure the tr.unitSquareTriangles data is current in the vertex / index cache
	if ( unitSquareTriangles == NULL ) {
		unitSquareTriangles = R_MakeFullScreenTris();
	}
	// make sure the tr.zeroOneCubeTriangles data is current in the vertex / index cache
	if ( zeroOneCubeTriangles == NULL ) {
		zeroOneCubeTriangles = R_MakeZeroOneCubeTris();
	}
	// make sure the tr.testImageTriangles data is current in the vertex / index cache
	if ( testImageTriangles == NULL )  {
		testImageTriangles = R_MakeTestImageTriangles();
	}

	frontEndJobList = parallelJobManager->AllocJobList( JOBLIST_RENDERER_FRONTEND, JOBLIST_PRIORITY_MEDIUM, 2048, 0, NULL );

	// make sure the command buffers are ready to accept the first screen update
	SwapCommandBuffers( NULL, NULL, NULL, NULL );

	common->Printf( "renderSystem initialized.\n" );
	common->Printf( "--------------------------------------\n" );
}

/*
===============
idRenderSystemLocal::Shutdown
===============
*/
void idRenderSystemLocal::Shutdown() {	
	common->Printf( "idRenderSystem::Shutdown()\n" );

	fonts.DeleteContents();

	if ( R_IsInitialized() ) {
		globalImages->PurgeAllImages();
	}

	renderModelManager->Shutdown();

	idCinematic::ShutdownCinematic( );

	globalImages->Shutdown();

	// free frame memory
	R_ShutdownFrameData();

	UnbindBufferObjects();

	// free the vertex cache, which should have nothing allocated now
	vertexCache.Shutdown();

	RB_ShutdownDebugTools();

	delete guiModel;

	parallelJobManager->FreeJobList( frontEndJobList );

	Clear();

	ShutdownOpenGL();
}

/*
========================
idRenderSystemLocal::ResetGuiModels
========================
*/
void idRenderSystemLocal::ResetGuiModels() {
	delete guiModel;
	guiModel = new (TAG_RENDER) idGuiModel;
	guiModel->Clear();
	guiModel->BeginFrame();
	tr_guiModel = guiModel;	// for DeviceContext fast path
}

/*
========================
idRenderSystemLocal::BeginLevelLoad
========================
*/
void idRenderSystemLocal::BeginLevelLoad() {
	globalImages->BeginLevelLoad();
	renderModelManager->BeginLevelLoad();

	// Re-Initialize the Default Materials if needed. 
	R_InitMaterials();
}

/*
========================
idRenderSystemLocal::LoadLevelImages
========================
*/
void idRenderSystemLocal::LoadLevelImages() {
	globalImages->LoadLevelImages( false );
}

/*
========================
idRenderSystemLocal::Preload
========================
*/
void idRenderSystemLocal::Preload( const idPreloadManifest &manifest, const char *mapName ) {
	globalImages->Preload( manifest, true );
	uiManager->Preload( mapName );
	renderModelManager->Preload( manifest );
}

/*
========================
idRenderSystemLocal::EndLevelLoad
========================
*/
void idRenderSystemLocal::EndLevelLoad() {
	renderModelManager->EndLevelLoad();
	globalImages->EndLevelLoad();
}

/*
========================
idRenderSystemLocal::BeginAutomaticBackgroundSwaps
========================
*/
void idRenderSystemLocal::BeginAutomaticBackgroundSwaps( autoRenderIconType_t icon ) {
}

/*
========================
idRenderSystemLocal::EndAutomaticBackgroundSwaps
========================
*/
void idRenderSystemLocal::EndAutomaticBackgroundSwaps() {
}

/*
========================
idRenderSystemLocal::AreAutomaticBackgroundSwapsRunning
========================
*/
bool idRenderSystemLocal::AreAutomaticBackgroundSwapsRunning( autoRenderIconType_t * icon ) const {
	return false;
}

/*
============
idRenderSystemLocal::RegisterFont
============
*/
idFont * idRenderSystemLocal::RegisterFont( const char * fontName ) {

	idStrStatic< MAX_OSPATH > baseFontName = fontName;
	baseFontName.Replace( "fonts/", "" );
	for ( int i = 0; i < fonts.Num(); i++ ) {
		if ( idStr::Icmp( fonts[i]->GetName(), baseFontName ) == 0 ) {
			fonts[i]->Touch();
			return fonts[i];
		}
	}
	idFont * newFont = new (TAG_FONT) idFont( baseFontName );
	fonts.Append( newFont );
	return newFont;
}

/*
========================
idRenderSystemLocal::ResetFonts
========================
*/
void idRenderSystemLocal::ResetFonts() {
	fonts.DeleteContents( true );
}
/*
========================
idRenderSystemLocal::InitOpenGL
========================
*/
void idRenderSystemLocal::InitOpenGL() {
	// if OpenGL isn't started, start it now
	if ( !R_IsInitialized() ) {
		R_InitOpenGL();

		// Reloading images here causes the rendertargets to get deleted. Figure out how to handle this properly on 360
		globalImages->ReloadImages( true );
		
		int err = qglGetError();
		if ( err != GL_NO_ERROR ) {
			common->Printf( "glGetError() = 0x%x\n", err );
		}
	}
}

/*
========================
idRenderSystemLocal::ShutdownOpenGL
========================
*/
void idRenderSystemLocal::ShutdownOpenGL() {
	// free the context and close the window
	R_ShutdownFrameData();
	GLimp_Shutdown();
	r_initialized = false;
}

/*
========================
idRenderSystemLocal::IsOpenGLRunning
========================
*/
bool idRenderSystemLocal::IsOpenGLRunning() const {
	return R_IsInitialized();
}

/*
========================
idRenderSystemLocal::IsFullScreen
========================
*/
bool idRenderSystemLocal::IsFullScreen() const {
	return glConfig.isFullscreen != 0;
}

/*
========================
idRenderSystemLocal::GetWidth
========================
*/
int idRenderSystemLocal::GetWidth() const {
	if ( glConfig.stereo3Dmode == STEREO3D_SIDE_BY_SIDE || glConfig.stereo3Dmode == STEREO3D_SIDE_BY_SIDE_COMPRESSED ) {
		return glConfig.nativeScreenWidth >> 1;
	}
	return glConfig.nativeScreenWidth;
}

/*
========================
idRenderSystemLocal::GetHeight
========================
*/
int idRenderSystemLocal::GetHeight() const {
	if ( glConfig.stereo3Dmode == STEREO3D_HDMI_720 ) {
		return 720;
	}
	extern idCVar stereoRender_warp;
	if ( glConfig.stereo3Dmode == STEREO3D_SIDE_BY_SIDE && stereoRender_warp.GetBool() ) {
		// for the Rift, render a square aspect view that will be symetric for the optics
		return glConfig.nativeScreenWidth >> 1;
	}
	if ( glConfig.stereo3Dmode == STEREO3D_INTERLACED || glConfig.stereo3Dmode == STEREO3D_TOP_AND_BOTTOM_COMPRESSED ) {
		return glConfig.nativeScreenHeight >> 1;
	}
	return glConfig.nativeScreenHeight;
}

/*
========================
idRenderSystemLocal::GetStereo3DMode
========================
*/
stereo3DMode_t idRenderSystemLocal::GetStereo3DMode() const {
	return glConfig.stereo3Dmode;
}

/*
========================
idRenderSystemLocal::IsStereoScopicRenderingSupported
========================
*/
bool idRenderSystemLocal::IsStereoScopicRenderingSupported() const {
	return true;
}

/*
========================
idRenderSystemLocal::HasQuadBufferSupport
========================
*/
bool idRenderSystemLocal::HasQuadBufferSupport() const {
	return glConfig.stereoPixelFormatAvailable;
}

/*
========================
idRenderSystemLocal::GetStereoScopicRenderingMode
========================
*/
stereo3DMode_t idRenderSystemLocal::GetStereoScopicRenderingMode() const {
	return ( !IsStereoScopicRenderingSupported() ) ? STEREO3D_OFF : (stereo3DMode_t)stereoRender_enable.GetInteger();
}

/*
========================
idRenderSystemLocal::IsStereoScopicRenderingSupported
========================
*/
void idRenderSystemLocal::EnableStereoScopicRendering( const stereo3DMode_t mode ) const {
	stereoRender_enable.SetInteger( mode );
}

/*
========================
idRenderSystemLocal::GetPixelAspect
========================
*/
float idRenderSystemLocal::GetPixelAspect() const {
	switch( glConfig.stereo3Dmode ) {
	case STEREO3D_SIDE_BY_SIDE_COMPRESSED:
		return glConfig.pixelAspect * 2.0f;
	case STEREO3D_TOP_AND_BOTTOM_COMPRESSED:
	case STEREO3D_INTERLACED:
		return glConfig.pixelAspect * 0.5f;
	default:
		return glConfig.pixelAspect;
	}
}

/*
========================
idRenderSystemLocal::GetPhysicalScreenWidthInCentimeters

This is used to calculate stereoscopic screen offset for a given interocular distance.
========================
*/
idCVar	r_forceScreenWidthCentimeters( "r_forceScreenWidthCentimeters", "0", CVAR_RENDERER | CVAR_ARCHIVE, "Override screen width returned by hardware" );
float idRenderSystemLocal::GetPhysicalScreenWidthInCentimeters() const {
	if ( r_forceScreenWidthCentimeters.GetFloat() > 0 ) {
		return r_forceScreenWidthCentimeters.GetFloat();
	}
	return glConfig.physicalScreenWidthInCentimeters;
}