Initial import.

1 files changed, 1210 insertions, 0 deletions

diff --git a/src/renderer/tr_backend.c b/src/renderer/tr_backend.c
new file mode 100644
index 0000000..b93b994
--- /dev/null
+++ b/src/renderer/tr_backend.c
@@ -0,0 +1,1210 @@
+/*
+===========================================================================
+Copyright (C) 1999-2005 Id Software, Inc.
+Copyright (C) 2000-2009 Darklegion Development
+
+This file is part of Tremulous.
+
+Tremulous 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 2 of the License,
+or (at your option) any later version.
+
+Tremulous 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 Tremulous; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+===========================================================================
+*/
+#include "tr_local.h"
+
+backEndData_t	*backEndData[SMP_FRAMES];
+backEndState_t	backEnd;
+
+
+static float	s_flipMatrix[16] = {
+	// convert from our coordinate system (looking down X)
+	// to OpenGL's coordinate system (looking down -Z)
+	0, 0, -1, 0,
+	-1, 0, 0, 0,
+	0, 1, 0, 0,
+	0, 0, 0, 1
+};
+
+
+/*
+** GL_Bind
+*/
+void GL_Bind( image_t *image ) {
+	int texnum;
+
+	if ( !image ) {
+		ri.Printf( PRINT_WARNING, "GL_Bind: NULL image\n" );
+		texnum = tr.defaultImage->texnum;
+	} else {
+		texnum = image->texnum;
+	}
+
+	if ( r_nobind->integer && tr.dlightImage ) {		// performance evaluation option
+		texnum = tr.dlightImage->texnum;
+	}
+
+	if ( glState.currenttextures[glState.currenttmu] != texnum ) {
+		image->frameUsed = tr.frameCount;
+		glState.currenttextures[glState.currenttmu] = texnum;
+		qglBindTexture (GL_TEXTURE_2D, texnum);
+	}
+}
+
+/*
+** GL_SelectTexture
+*/
+void GL_SelectTexture( int unit )
+{
+	if ( glState.currenttmu == unit )
+	{
+		return;
+	}
+
+	if ( unit == 0 )
+	{
+		qglActiveTextureARB( GL_TEXTURE0_ARB );
+		GLimp_LogComment( "glActiveTextureARB( GL_TEXTURE0_ARB )\n" );
+		qglClientActiveTextureARB( GL_TEXTURE0_ARB );
+		GLimp_LogComment( "glClientActiveTextureARB( GL_TEXTURE0_ARB )\n" );
+	}
+	else if ( unit == 1 )
+	{
+		qglActiveTextureARB( GL_TEXTURE1_ARB );
+		GLimp_LogComment( "glActiveTextureARB( GL_TEXTURE1_ARB )\n" );
+		qglClientActiveTextureARB( GL_TEXTURE1_ARB );
+		GLimp_LogComment( "glClientActiveTextureARB( GL_TEXTURE1_ARB )\n" );
+	} else {
+		ri.Error( ERR_DROP, "GL_SelectTexture: unit = %i", unit );
+	}
+
+	glState.currenttmu = unit;
+}
+
+
+/*
+** GL_BindMultitexture
+*/
+void GL_BindMultitexture( image_t *image0, GLuint env0, image_t *image1, GLuint env1 ) {
+	int		texnum0, texnum1;
+
+	texnum0 = image0->texnum;
+	texnum1 = image1->texnum;
+
+	if ( r_nobind->integer && tr.dlightImage ) {		// performance evaluation option
+		texnum0 = texnum1 = tr.dlightImage->texnum;
+	}
+
+	if ( glState.currenttextures[1] != texnum1 ) {
+		GL_SelectTexture( 1 );
+		image1->frameUsed = tr.frameCount;
+		glState.currenttextures[1] = texnum1;
+		qglBindTexture( GL_TEXTURE_2D, texnum1 );
+	}
+	if ( glState.currenttextures[0] != texnum0 ) {
+		GL_SelectTexture( 0 );
+		image0->frameUsed = tr.frameCount;
+		glState.currenttextures[0] = texnum0;
+		qglBindTexture( GL_TEXTURE_2D, texnum0 );
+	}
+}
+
+
+/*
+** GL_Cull
+*/
+void GL_Cull( int cullType ) {
+	if ( glState.faceCulling == cullType ) {
+		return;
+	}
+
+	glState.faceCulling = cullType;
+
+	if ( cullType == CT_TWO_SIDED ) 
+	{
+		qglDisable( GL_CULL_FACE );
+	} 
+	else 
+	{
+		qglEnable( GL_CULL_FACE );
+
+		if ( cullType == CT_BACK_SIDED )
+		{
+			if ( backEnd.viewParms.isMirror )
+			{
+				qglCullFace( GL_FRONT );
+			}
+			else
+			{
+				qglCullFace( GL_BACK );
+			}
+		}
+		else
+		{
+			if ( backEnd.viewParms.isMirror )
+			{
+				qglCullFace( GL_BACK );
+			}
+			else
+			{
+				qglCullFace( GL_FRONT );
+			}
+		}
+	}
+}
+
+/*
+** GL_TexEnv
+*/
+void GL_TexEnv( int env )
+{
+	if ( env == glState.texEnv[glState.currenttmu] )
+	{
+		return;
+	}
+
+	glState.texEnv[glState.currenttmu] = env;
+
+
+	switch ( env )
+	{
+	case GL_MODULATE:
+		qglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
+		break;
+	case GL_REPLACE:
+		qglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE );
+		break;
+	case GL_DECAL:
+		qglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL );
+		break;
+	case GL_ADD:
+		qglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD );
+		break;
+	default:
+		ri.Error( ERR_DROP, "GL_TexEnv: invalid env '%d' passed\n", env );
+		break;
+	}
+}
+
+/*
+** GL_State
+**
+** This routine is responsible for setting the most commonly changed state
+** in Q3.
+*/
+void GL_State( unsigned long stateBits )
+{
+	unsigned long diff = stateBits ^ glState.glStateBits;
+
+	if ( !diff )
+	{
+		return;
+	}
+
+	//
+	// check depthFunc bits
+	//
+	if ( diff & GLS_DEPTHFUNC_EQUAL )
+	{
+		if ( stateBits & GLS_DEPTHFUNC_EQUAL )
+		{
+			qglDepthFunc( GL_EQUAL );
+		}
+		else
+		{
+			qglDepthFunc( GL_LEQUAL );
+		}
+	}
+
+	//
+	// check blend bits
+	//
+	if ( diff & ( GLS_SRCBLEND_BITS | GLS_DSTBLEND_BITS ) )
+	{
+		GLenum srcFactor, dstFactor;
+
+		if ( stateBits & ( GLS_SRCBLEND_BITS | GLS_DSTBLEND_BITS ) )
+		{
+			switch ( stateBits & GLS_SRCBLEND_BITS )
+			{
+			case GLS_SRCBLEND_ZERO:
+				srcFactor = GL_ZERO;
+				break;
+			case GLS_SRCBLEND_ONE:
+				srcFactor = GL_ONE;
+				break;
+			case GLS_SRCBLEND_DST_COLOR:
+				srcFactor = GL_DST_COLOR;
+				break;
+			case GLS_SRCBLEND_ONE_MINUS_DST_COLOR:
+				srcFactor = GL_ONE_MINUS_DST_COLOR;
+				break;
+			case GLS_SRCBLEND_SRC_ALPHA:
+				srcFactor = GL_SRC_ALPHA;
+				break;
+			case GLS_SRCBLEND_ONE_MINUS_SRC_ALPHA:
+				srcFactor = GL_ONE_MINUS_SRC_ALPHA;
+				break;
+			case GLS_SRCBLEND_DST_ALPHA:
+				srcFactor = GL_DST_ALPHA;
+				break;
+			case GLS_SRCBLEND_ONE_MINUS_DST_ALPHA:
+				srcFactor = GL_ONE_MINUS_DST_ALPHA;
+				break;
+			case GLS_SRCBLEND_ALPHA_SATURATE:
+				srcFactor = GL_SRC_ALPHA_SATURATE;
+				break;
+			default:
+				srcFactor = GL_ONE;		// to get warning to shut up
+				ri.Error( ERR_DROP, "GL_State: invalid src blend state bits\n" );
+				break;
+			}
+
+			switch ( stateBits & GLS_DSTBLEND_BITS )
+			{
+			case GLS_DSTBLEND_ZERO:
+				dstFactor = GL_ZERO;
+				break;
+			case GLS_DSTBLEND_ONE:
+				dstFactor = GL_ONE;
+				break;
+			case GLS_DSTBLEND_SRC_COLOR:
+				dstFactor = GL_SRC_COLOR;
+				break;
+			case GLS_DSTBLEND_ONE_MINUS_SRC_COLOR:
+				dstFactor = GL_ONE_MINUS_SRC_COLOR;
+				break;
+			case GLS_DSTBLEND_SRC_ALPHA:
+				dstFactor = GL_SRC_ALPHA;
+				break;
+			case GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA:
+				dstFactor = GL_ONE_MINUS_SRC_ALPHA;
+				break;
+			case GLS_DSTBLEND_DST_ALPHA:
+				dstFactor = GL_DST_ALPHA;
+				break;
+			case GLS_DSTBLEND_ONE_MINUS_DST_ALPHA:
+				dstFactor = GL_ONE_MINUS_DST_ALPHA;
+				break;
+			default:
+				dstFactor = GL_ONE;		// to get warning to shut up
+				ri.Error( ERR_DROP, "GL_State: invalid dst blend state bits\n" );
+				break;
+			}
+
+			qglEnable( GL_BLEND );
+			qglBlendFunc( srcFactor, dstFactor );
+		}
+		else
+		{
+			qglDisable( GL_BLEND );
+		}
+	}
+
+	//
+	// check depthmask
+	//
+	if ( diff & GLS_DEPTHMASK_TRUE )
+	{
+		if ( stateBits & GLS_DEPTHMASK_TRUE )
+		{
+			qglDepthMask( GL_TRUE );
+		}
+		else
+		{
+			qglDepthMask( GL_FALSE );
+		}
+	}
+
+	//
+	// fill/line mode
+	//
+	if ( diff & GLS_POLYMODE_LINE )
+	{
+		if ( stateBits & GLS_POLYMODE_LINE )
+		{
+			qglPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
+		}
+		else
+		{
+			qglPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
+		}
+	}
+
+	//
+	// depthtest
+	//
+	if ( diff & GLS_DEPTHTEST_DISABLE )
+	{
+		if ( stateBits & GLS_DEPTHTEST_DISABLE )
+		{
+			qglDisable( GL_DEPTH_TEST );
+		}
+		else
+		{
+			qglEnable( GL_DEPTH_TEST );
+		}
+	}
+
+	//
+	// alpha test
+	//
+	if ( diff & GLS_ATEST_BITS )
+	{
+		switch ( stateBits & GLS_ATEST_BITS )
+		{
+		case 0:
+			qglDisable( GL_ALPHA_TEST );
+			break;
+		case GLS_ATEST_GT_0:
+			qglEnable( GL_ALPHA_TEST );
+			qglAlphaFunc( GL_GREATER, 0.0f );
+			break;
+		case GLS_ATEST_LT_80:
+			qglEnable( GL_ALPHA_TEST );
+			qglAlphaFunc( GL_LESS, 0.5f );
+			break;
+		case GLS_ATEST_GE_80:
+			qglEnable( GL_ALPHA_TEST );
+			qglAlphaFunc( GL_GEQUAL, 0.5f );
+			break;
+		default:
+			assert( 0 );
+			break;
+		}
+	}
+
+	glState.glStateBits = stateBits;
+}
+
+
+
+/*
+================
+RB_Hyperspace
+
+A player has predicted a teleport, but hasn't arrived yet
+================
+*/
+static void RB_Hyperspace( void ) {
+	float		c;
+
+	if ( !backEnd.isHyperspace ) {
+		// do initialization shit
+	}
+
+	c = ( backEnd.refdef.time & 255 ) / 255.0f;
+	qglClearColor( c, c, c, 1 );
+	qglClear( GL_COLOR_BUFFER_BIT );
+
+	backEnd.isHyperspace = qtrue;
+}
+
+
+static void SetViewportAndScissor( void ) {
+	qglMatrixMode(GL_PROJECTION);
+	qglLoadMatrixf( backEnd.viewParms.projectionMatrix );
+	qglMatrixMode(GL_MODELVIEW);
+
+	// set the window clipping
+	qglViewport( backEnd.viewParms.viewportX, backEnd.viewParms.viewportY, 
+		backEnd.viewParms.viewportWidth, backEnd.viewParms.viewportHeight );
+	qglScissor( backEnd.viewParms.viewportX, backEnd.viewParms.viewportY, 
+		backEnd.viewParms.viewportWidth, backEnd.viewParms.viewportHeight );
+}
+
+/*
+=================
+RB_BeginDrawingView
+
+Any mirrored or portaled views have already been drawn, so prepare
+to actually render the visible surfaces for this view
+=================
+*/
+void RB_BeginDrawingView (void) {
+	int clearBits = 0;
+
+	// sync with gl if needed
+	if ( r_finish->integer == 1 && !glState.finishCalled ) {
+		qglFinish ();
+		glState.finishCalled = qtrue;
+	}
+	if ( r_finish->integer == 0 ) {
+		glState.finishCalled = qtrue;
+	}
+
+	// we will need to change the projection matrix before drawing
+	// 2D images again
+	backEnd.projection2D = qfalse;
+
+	//
+	// set the modelview matrix for the viewer
+	//
+	SetViewportAndScissor();
+
+	// ensures that depth writes are enabled for the depth clear
+	GL_State( GLS_DEFAULT );
+	// clear relevant buffers
+	clearBits = GL_DEPTH_BUFFER_BIT;
+
+	if ( r_measureOverdraw->integer || r_shadows->integer == 2 )
+	{
+		clearBits |= GL_STENCIL_BUFFER_BIT;
+	}
+	if ( r_fastsky->integer && !( backEnd.refdef.rdflags & RDF_NOWORLDMODEL ) )
+	{
+		clearBits |= GL_COLOR_BUFFER_BIT;	// FIXME: only if sky shaders have been used
+#ifdef _DEBUG
+		qglClearColor( 0.8f, 0.7f, 0.4f, 1.0f );	// FIXME: get color of sky
+#else
+		qglClearColor( 0.0f, 0.0f, 0.0f, 1.0f );	// FIXME: get color of sky
+#endif
+	}
+	qglClear( clearBits );
+
+	if ( ( backEnd.refdef.rdflags & RDF_HYPERSPACE ) )
+	{
+		RB_Hyperspace();
+		return;
+	}
+	else
+	{
+		backEnd.isHyperspace = qfalse;
+	}
+
+	glState.faceCulling = -1;		// force face culling to set next time
+
+	// we will only draw a sun if there was sky rendered in this view
+	backEnd.skyRenderedThisView = qfalse;
+
+	// clip to the plane of the portal
+	if ( backEnd.viewParms.isPortal ) {
+		float	plane[4];
+		double	plane2[4];
+
+		plane[0] = backEnd.viewParms.portalPlane.normal[0];
+		plane[1] = backEnd.viewParms.portalPlane.normal[1];
+		plane[2] = backEnd.viewParms.portalPlane.normal[2];
+		plane[3] = backEnd.viewParms.portalPlane.dist;
+
+		plane2[0] = DotProduct (backEnd.viewParms.or.axis[0], plane);
+		plane2[1] = DotProduct (backEnd.viewParms.or.axis[1], plane);
+		plane2[2] = DotProduct (backEnd.viewParms.or.axis[2], plane);
+		plane2[3] = DotProduct (plane, backEnd.viewParms.or.origin) - plane[3];
+
+		qglLoadMatrixf( s_flipMatrix );
+		qglClipPlane (GL_CLIP_PLANE0, plane2);
+		qglEnable (GL_CLIP_PLANE0);
+	} else {
+		qglDisable (GL_CLIP_PLANE0);
+	}
+}
+
+
+#define	MAC_EVENT_PUMP_MSEC		5
+
+/*
+==================
+RB_RenderDrawSurfList
+==================
+*/
+void RB_RenderDrawSurfList( drawSurf_t *drawSurfs, int numDrawSurfs ) {
+	shader_t		*shader, *oldShader;
+	int				fogNum, oldFogNum;
+	int				entityNum, oldEntityNum;
+	int				dlighted, oldDlighted;
+	qboolean		depthRange, oldDepthRange, isCrosshair, wasCrosshair;
+	int				i;
+	drawSurf_t		*drawSurf;
+	int				oldSort;
+	float			originalTime;
+
+	// save original time for entity shader offsets
+	originalTime = backEnd.refdef.floatTime;
+
+	// clear the z buffer, set the modelview, etc
+	RB_BeginDrawingView ();
+
+	// draw everything
+	oldEntityNum = -1;
+	backEnd.currentEntity = &tr.worldEntity;
+	oldShader = NULL;
+	oldFogNum = -1;
+	oldDepthRange = qfalse;
+	wasCrosshair = qfalse;
+	oldDlighted = qfalse;
+	oldSort = -1;
+	depthRange = qfalse;
+
+	backEnd.pc.c_surfaces += numDrawSurfs;
+
+	for (i = 0, drawSurf = drawSurfs ; i < numDrawSurfs ; i++, drawSurf++) {
+		if ( drawSurf->sort == oldSort ) {
+			// fast path, same as previous sort
+			rb_surfaceTable[ *drawSurf->surface ]( drawSurf->surface );
+			continue;
+		}
+		oldSort = drawSurf->sort;
+		R_DecomposeSort( drawSurf->sort, &entityNum, &shader, &fogNum, &dlighted );
+
+		//
+		// change the tess parameters if needed
+		// a "entityMergable" shader is a shader that can have surfaces from seperate
+		// entities merged into a single batch, like smoke and blood puff sprites
+		if (shader != oldShader || fogNum != oldFogNum || dlighted != oldDlighted 
+			|| ( entityNum != oldEntityNum && !shader->entityMergable ) ) {
+			if (oldShader != NULL) {
+				RB_EndSurface();
+			}
+			RB_BeginSurface( shader, fogNum );
+			oldShader = shader;
+			oldFogNum = fogNum;
+			oldDlighted = dlighted;
+		}
+
+		//
+		// change the modelview matrix if needed
+		//
+		if ( entityNum != oldEntityNum ) {
+			depthRange = isCrosshair = qfalse;
+
+			if ( entityNum != ENTITYNUM_WORLD ) {
+				backEnd.currentEntity = &backEnd.refdef.entities[entityNum];
+				backEnd.refdef.floatTime = originalTime - backEnd.currentEntity->e.shaderTime;
+				// we have to reset the shaderTime as well otherwise image animations start
+				// from the wrong frame
+				tess.shaderTime = backEnd.refdef.floatTime - tess.shader->timeOffset;
+
+				// set up the transformation matrix
+				R_RotateForEntity( backEnd.currentEntity, &backEnd.viewParms, &backEnd.or );
+
+				// set up the dynamic lighting if needed
+				if ( backEnd.currentEntity->needDlights ) {
+					R_TransformDlights( backEnd.refdef.num_dlights, backEnd.refdef.dlights, &backEnd.or );
+				}
+
+				if(backEnd.currentEntity->e.renderfx & RF_DEPTHHACK)
+				{
+					// hack the depth range to prevent view model from poking into walls
+					depthRange = qtrue;
+					
+					if(backEnd.currentEntity->e.renderfx & RF_CROSSHAIR)
+						isCrosshair = qtrue;
+				}
+			} else {
+				backEnd.currentEntity = &tr.worldEntity;
+				backEnd.refdef.floatTime = originalTime;
+				backEnd.or = backEnd.viewParms.world;
+				// we have to reset the shaderTime as well otherwise image animations on
+				// the world (like water) continue with the wrong frame
+				tess.shaderTime = backEnd.refdef.floatTime - tess.shader->timeOffset;
+				R_TransformDlights( backEnd.refdef.num_dlights, backEnd.refdef.dlights, &backEnd.or );
+			}
+
+			qglLoadMatrixf( backEnd.or.modelMatrix );
+
+			//
+			// change depthrange. Also change projection matrix so first person weapon does not look like coming
+			// out of the screen.
+			//
+			if (oldDepthRange != depthRange || wasCrosshair != isCrosshair)
+			{
+				if (depthRange)
+				{
+					if(backEnd.viewParms.stereoFrame != STEREO_CENTER)
+					{
+						if(isCrosshair)
+						{
+							if(oldDepthRange)
+							{
+								// was not a crosshair but now is, change back proj matrix
+								qglMatrixMode(GL_PROJECTION);
+								qglLoadMatrixf(backEnd.viewParms.projectionMatrix);
+								qglMatrixMode(GL_MODELVIEW);
+							}
+						}
+						else
+						{
+							viewParms_t temp = backEnd.viewParms;
+
+							R_SetupProjection(&temp, r_znear->value, qfalse);
+
+							qglMatrixMode(GL_PROJECTION);
+							qglLoadMatrixf(temp.projectionMatrix);
+							qglMatrixMode(GL_MODELVIEW);
+						}
+					}
+
+					if(!oldDepthRange)
+						qglDepthRange (0, 0.3);
+				}
+				else
+				{
+					if(!wasCrosshair && backEnd.viewParms.stereoFrame != STEREO_CENTER)
+					{
+						qglMatrixMode(GL_PROJECTION);
+						qglLoadMatrixf(backEnd.viewParms.projectionMatrix);
+						qglMatrixMode(GL_MODELVIEW);
+					}
+
+					qglDepthRange (0, 1);
+				}
+
+				oldDepthRange = depthRange;
+				wasCrosshair = isCrosshair;
+			}
+
+			oldEntityNum = entityNum;
+		}
+
+		// add the triangles for this surface
+		rb_surfaceTable[ *drawSurf->surface ]( drawSurf->surface );
+	}
+
+	backEnd.refdef.floatTime = originalTime;
+
+	// draw the contents of the last shader batch
+	if (oldShader != NULL) {
+		RB_EndSurface();
+	}
+
+	// go back to the world modelview matrix
+	qglLoadMatrixf( backEnd.viewParms.world.modelMatrix );
+	if ( depthRange ) {
+		qglDepthRange (0, 1);
+	}
+
+#if 0
+	RB_DrawSun();
+#endif
+	// darken down any stencil shadows
+	RB_ShadowFinish();		
+
+	// add light flares on lights that aren't obscured
+	RB_RenderFlares();
+}
+
+
+/*
+============================================================================
+
+RENDER BACK END THREAD FUNCTIONS
+
+============================================================================
+*/
+
+/*
+================
+RB_SetGL2D
+
+================
+*/
+void	RB_SetGL2D (void) {
+	backEnd.projection2D = qtrue;
+
+	// set 2D virtual screen size
+	qglViewport( 0, 0, glConfig.vidWidth, glConfig.vidHeight );
+	qglScissor( 0, 0, glConfig.vidWidth, glConfig.vidHeight );
+	qglMatrixMode(GL_PROJECTION);
+    qglLoadIdentity ();
+	qglOrtho (0, glConfig.vidWidth, glConfig.vidHeight, 0, 0, 1);
+	qglMatrixMode(GL_MODELVIEW);
+    qglLoadIdentity ();
+
+	GL_State( GLS_DEPTHTEST_DISABLE |
+			  GLS_SRCBLEND_SRC_ALPHA |
+			  GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA );
+
+	qglDisable( GL_CULL_FACE );
+	qglDisable( GL_CLIP_PLANE0 );
+
+	// set time for 2D shaders
+	backEnd.refdef.time = ri.Milliseconds();
+	backEnd.refdef.floatTime = backEnd.refdef.time * 0.001f;
+}
+
+
+/*
+=============
+RE_StretchRaw
+
+FIXME: not exactly backend
+Stretches a raw 32 bit power of 2 bitmap image over the given screen rectangle.
+Used for cinematics.
+=============
+*/
+void RE_StretchRaw (int x, int y, int w, int h, int cols, int rows, const byte *data, int client, qboolean dirty) {
+	int			i, j;
+	int			start, end;
+
+	if ( !tr.registered ) {
+		return;
+	}
+	R_SyncRenderThread();
+
+	// we definately want to sync every frame for the cinematics
+	qglFinish();
+
+	start = end = 0;
+	if ( r_speeds->integer ) {
+		start = ri.Milliseconds();
+	}
+
+	// make sure rows and cols are powers of 2
+	for ( i = 0 ; ( 1 << i ) < cols ; i++ ) {
+	}
+	for ( j = 0 ; ( 1 << j ) < rows ; j++ ) {
+	}
+	if ( ( 1 << i ) != cols || ( 1 << j ) != rows) {
+		ri.Error (ERR_DROP, "Draw_StretchRaw: size not a power of 2: %i by %i", cols, rows);
+	}
+
+	GL_Bind( tr.scratchImage[client] );
+
+	// if the scratchImage isn't in the format we want, specify it as a new texture
+	if ( cols != tr.scratchImage[client]->width || rows != tr.scratchImage[client]->height ) {
+		tr.scratchImage[client]->width = tr.scratchImage[client]->uploadWidth = cols;
+		tr.scratchImage[client]->height = tr.scratchImage[client]->uploadHeight = rows;
+		qglTexImage2D( GL_TEXTURE_2D, 0, GL_RGB8, cols, rows, 0, GL_RGBA, GL_UNSIGNED_BYTE, data );
+		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
+		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );	
+	} else {
+		if (dirty) {
+			// otherwise, just subimage upload it so that drivers can tell we are going to be changing
+			// it and don't try and do a texture compression
+			qglTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0, cols, rows, GL_RGBA, GL_UNSIGNED_BYTE, data );
+		}
+	}
+
+	if ( r_speeds->integer ) {
+		end = ri.Milliseconds();
+		ri.Printf( PRINT_ALL, "qglTexSubImage2D %i, %i: %i msec\n", cols, rows, end - start );
+	}
+
+	RB_SetGL2D();
+
+	qglColor3f( tr.identityLight, tr.identityLight, tr.identityLight );
+
+	qglBegin (GL_QUADS);
+	qglTexCoord2f ( 0.5f / cols,  0.5f / rows );
+	qglVertex2f (x, y);
+	qglTexCoord2f ( ( cols - 0.5f ) / cols ,  0.5f / rows );
+	qglVertex2f (x+w, y);
+	qglTexCoord2f ( ( cols - 0.5f ) / cols, ( rows - 0.5f ) / rows );
+	qglVertex2f (x+w, y+h);
+	qglTexCoord2f ( 0.5f / cols, ( rows - 0.5f ) / rows );
+	qglVertex2f (x, y+h);
+	qglEnd ();
+}
+
+void RE_UploadCinematic (int w, int h, int cols, int rows, const byte *data, int client, qboolean dirty) {
+
+	GL_Bind( tr.scratchImage[client] );
+
+	// if the scratchImage isn't in the format we want, specify it as a new texture
+	if ( cols != tr.scratchImage[client]->width || rows != tr.scratchImage[client]->height ) {
+		tr.scratchImage[client]->width = tr.scratchImage[client]->uploadWidth = cols;
+		tr.scratchImage[client]->height = tr.scratchImage[client]->uploadHeight = rows;
+		qglTexImage2D( GL_TEXTURE_2D, 0, GL_RGB8, cols, rows, 0, GL_RGBA, GL_UNSIGNED_BYTE, data );
+		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
+		qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );	
+	} else {
+		if (dirty) {
+			// otherwise, just subimage upload it so that drivers can tell we are going to be changing
+			// it and don't try and do a texture compression
+			qglTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0, cols, rows, GL_RGBA, GL_UNSIGNED_BYTE, data );
+		}
+	}
+}
+
+
+/*
+=============
+RB_SetColor
+
+=============
+*/
+const void	*RB_SetColor( const void *data ) {
+	const setColorCommand_t	*cmd;
+
+	cmd = (const setColorCommand_t *)data;
+
+	backEnd.color2D[0] = cmd->color[0] * 255;
+	backEnd.color2D[1] = cmd->color[1] * 255;
+	backEnd.color2D[2] = cmd->color[2] * 255;
+	backEnd.color2D[3] = cmd->color[3] * 255;
+
+	return (const void *)(cmd + 1);
+}
+
+/*
+=============
+RB_StretchPic
+=============
+*/
+const void *RB_StretchPic ( const void *data ) {
+	const stretchPicCommand_t	*cmd;
+	shader_t *shader;
+	int		numVerts, numIndexes;
+
+	cmd = (const stretchPicCommand_t *)data;
+
+	if ( !backEnd.projection2D ) {
+		RB_SetGL2D();
+	}
+
+	shader = cmd->shader;
+	if ( shader != tess.shader ) {
+		if ( tess.numIndexes ) {
+			RB_EndSurface();
+		}
+		backEnd.currentEntity = &backEnd.entity2D;
+		RB_BeginSurface( shader, 0 );
+	}
+
+	RB_CHECKOVERFLOW( 4, 6 );
+	numVerts = tess.numVertexes;
+	numIndexes = tess.numIndexes;
+
+	tess.numVertexes += 4;
+	tess.numIndexes += 6;
+
+	tess.indexes[ numIndexes ] = numVerts + 3;
+	tess.indexes[ numIndexes + 1 ] = numVerts + 0;
+	tess.indexes[ numIndexes + 2 ] = numVerts + 2;
+	tess.indexes[ numIndexes + 3 ] = numVerts + 2;
+	tess.indexes[ numIndexes + 4 ] = numVerts + 0;
+	tess.indexes[ numIndexes + 5 ] = numVerts + 1;
+
+	*(int *)tess.vertexColors[ numVerts ] =
+		*(int *)tess.vertexColors[ numVerts + 1 ] =
+		*(int *)tess.vertexColors[ numVerts + 2 ] =
+		*(int *)tess.vertexColors[ numVerts + 3 ] = *(int *)backEnd.color2D;
+
+	tess.xyz[ numVerts ][0] = cmd->x;
+	tess.xyz[ numVerts ][1] = cmd->y;
+	tess.xyz[ numVerts ][2] = 0;
+
+	tess.texCoords[ numVerts ][0][0] = cmd->s1;
+	tess.texCoords[ numVerts ][0][1] = cmd->t1;
+
+	tess.xyz[ numVerts + 1 ][0] = cmd->x + cmd->w;
+	tess.xyz[ numVerts + 1 ][1] = cmd->y;
+	tess.xyz[ numVerts + 1 ][2] = 0;
+
+	tess.texCoords[ numVerts + 1 ][0][0] = cmd->s2;
+	tess.texCoords[ numVerts + 1 ][0][1] = cmd->t1;
+
+	tess.xyz[ numVerts + 2 ][0] = cmd->x + cmd->w;
+	tess.xyz[ numVerts + 2 ][1] = cmd->y + cmd->h;
+	tess.xyz[ numVerts + 2 ][2] = 0;
+
+	tess.texCoords[ numVerts + 2 ][0][0] = cmd->s2;
+	tess.texCoords[ numVerts + 2 ][0][1] = cmd->t2;
+
+	tess.xyz[ numVerts + 3 ][0] = cmd->x;
+	tess.xyz[ numVerts + 3 ][1] = cmd->y + cmd->h;
+	tess.xyz[ numVerts + 3 ][2] = 0;
+
+	tess.texCoords[ numVerts + 3 ][0][0] = cmd->s1;
+	tess.texCoords[ numVerts + 3 ][0][1] = cmd->t2;
+
+	return (const void *)(cmd + 1);
+}
+
+
+/*
+=============
+RB_DrawSurfs
+
+=============
+*/
+const void	*RB_DrawSurfs( const void *data ) {
+	const drawSurfsCommand_t	*cmd;
+
+	// finish any 2D drawing if needed
+	if ( tess.numIndexes ) {
+		RB_EndSurface();
+	}
+
+	cmd = (const drawSurfsCommand_t *)data;
+
+	backEnd.refdef = cmd->refdef;
+	backEnd.viewParms = cmd->viewParms;
+
+	RB_RenderDrawSurfList( cmd->drawSurfs, cmd->numDrawSurfs );
+
+	return (const void *)(cmd + 1);
+}
+
+
+/*
+=============
+RB_DrawBuffer
+
+=============
+*/
+const void	*RB_DrawBuffer( const void *data ) {
+	const drawBufferCommand_t	*cmd;
+
+	cmd = (const drawBufferCommand_t *)data;
+
+	qglDrawBuffer( cmd->buffer );
+
+	// clear screen for debugging
+	if ( r_clear->integer ) {
+		qglClearColor( 1, 0, 0.5, 1 );
+		qglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+	}
+
+	return (const void *)(cmd + 1);
+}
+
+/*
+===============
+RB_ShowImages
+
+Draw all the images to the screen, on top of whatever
+was there.  This is used to test for texture thrashing.
+
+Also called by RE_EndRegistration
+===============
+*/
+void RB_ShowImages( void ) {
+	int		i;
+	image_t	*image;
+	float	x, y, w, h;
+	int		start, end;
+
+	if ( !backEnd.projection2D ) {
+		RB_SetGL2D();
+	}
+
+	qglClear( GL_COLOR_BUFFER_BIT );
+
+	qglFinish();
+
+	start = ri.Milliseconds();
+
+	for ( i=0 ; i<tr.numImages ; i++ ) {
+		image = tr.images[i];
+
+		w = glConfig.vidWidth / 20;
+		h = glConfig.vidHeight / 15;
+		x = i % 20 * w;
+		y = i / 20 * h;
+
+		// show in proportional size in mode 2
+		if ( r_showImages->integer == 2 ) {
+			w *= image->uploadWidth / 512.0f;
+			h *= image->uploadHeight / 512.0f;
+		}
+
+		GL_Bind( image );
+		qglBegin (GL_QUADS);
+		qglTexCoord2f( 0, 0 );
+		qglVertex2f( x, y );
+		qglTexCoord2f( 1, 0 );
+		qglVertex2f( x + w, y );
+		qglTexCoord2f( 1, 1 );
+		qglVertex2f( x + w, y + h );
+		qglTexCoord2f( 0, 1 );
+		qglVertex2f( x, y + h );
+		qglEnd();
+	}
+
+	qglFinish();
+
+	//end = ri.Milliseconds();
+	//ri.Printf( PRINT_ALL, "%i msec to draw all images\n", end - start );
+
+}
+
+/*
+=============
+RB_ColorMask
+
+=============
+*/
+const void *RB_ColorMask(const void *data)
+{
+	const colorMaskCommand_t *cmd = data;
+	
+	qglColorMask(cmd->rgba[0], cmd->rgba[1], cmd->rgba[2], cmd->rgba[3]);
+	
+	return (const void *)(cmd + 1);
+}
+
+/*
+=============
+RB_ClearDepth
+
+=============
+*/
+const void *RB_ClearDepth(const void *data)
+{
+	const clearDepthCommand_t *cmd = data;
+	
+	if(tess.numIndexes)
+		RB_EndSurface();
+
+	// texture swapping test
+	if (r_showImages->integer)
+		RB_ShowImages();
+
+	qglClear(GL_DEPTH_BUFFER_BIT);
+	
+	return (const void *)(cmd + 1);
+}
+
+/*
+=============
+RB_SwapBuffers
+
+=============
+*/
+const void	*RB_SwapBuffers( const void *data ) {
+	const swapBuffersCommand_t	*cmd;
+
+	// finish any 2D drawing if needed
+	if ( tess.numIndexes ) {
+		RB_EndSurface();
+	}
+
+	// texture swapping test
+	if ( r_showImages->integer ) {
+		RB_ShowImages();
+	}
+
+	cmd = (const swapBuffersCommand_t *)data;
+
+	// we measure overdraw by reading back the stencil buffer and
+	// counting up the number of increments that have happened
+	if ( r_measureOverdraw->integer ) {
+		int i;
+		long sum = 0;
+		unsigned char *stencilReadback;
+
+		stencilReadback = ri.Hunk_AllocateTempMemory( glConfig.vidWidth * glConfig.vidHeight );
+		qglReadPixels( 0, 0, glConfig.vidWidth, glConfig.vidHeight, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, stencilReadback );
+
+		for ( i = 0; i < glConfig.vidWidth * glConfig.vidHeight; i++ ) {
+			sum += stencilReadback[i];
+		}
+
+		backEnd.pc.c_overDraw += sum;
+		ri.Hunk_FreeTempMemory( stencilReadback );
+	}
+
+
+	if ( !glState.finishCalled ) {
+		qglFinish();
+	}
+
+	GLimp_LogComment( "***************** RB_SwapBuffers *****************\n\n\n" );
+
+	GLimp_EndFrame();
+
+	backEnd.projection2D = qfalse;
+
+	return (const void *)(cmd + 1);
+}
+
+/*
+====================
+RB_ExecuteRenderCommands
+
+This function will be called synchronously if running without
+smp extensions, or asynchronously by another thread.
+====================
+*/
+void RB_ExecuteRenderCommands( const void *data ) {
+	int		t1, t2;
+
+	t1 = ri.Milliseconds ();
+
+	if ( !r_smp->integer || data == backEndData[0]->commands.cmds ) {
+		backEnd.smpFrame = 0;
+	} else {
+		backEnd.smpFrame = 1;
+	}
+
+	while ( 1 ) {
+		switch ( *(const int *)data ) {
+		case RC_SET_COLOR:
+			data = RB_SetColor( data );
+			break;
+		case RC_STRETCH_PIC:
+			data = RB_StretchPic( data );
+			break;
+		case RC_DRAW_SURFS:
+			data = RB_DrawSurfs( data );
+			break;
+		case RC_DRAW_BUFFER:
+			data = RB_DrawBuffer( data );
+			break;
+		case RC_SWAP_BUFFERS:
+			data = RB_SwapBuffers( data );
+			break;
+		case RC_SCREENSHOT:
+			data = RB_TakeScreenshotCmd( data );
+			break;
+		case RC_VIDEOFRAME:
+			data = RB_TakeVideoFrameCmd( data );
+			break;
+		case RC_COLORMASK:
+			data = RB_ColorMask(data);
+			break;
+		case RC_CLEARDEPTH:
+			data = RB_ClearDepth(data);
+			break;
+		case RC_END_OF_LIST:
+		default:
+			// stop rendering on this thread
+			t2 = ri.Milliseconds ();
+			backEnd.pc.msec = t2 - t1;
+			return;
+		}
+	}
+
+}
+
+
+/*
+================
+RB_RenderThread
+================
+*/
+void RB_RenderThread( void ) {
+	const void	*data;
+
+	// wait for either a rendering command or a quit command
+	while ( 1 ) {
+		// sleep until we have work to do
+		data = GLimp_RendererSleep();
+
+		if ( !data ) {
+			return;	// all done, renderer is shutting down
+		}
+
+		renderThreadActive = qtrue;
+
+		RB_ExecuteRenderCommands( data );
+
+		renderThreadActive = qfalse;
+	}
+}
+