X-Git-Url: http://de.git.xonotic.org/?p=xonotic%2Fdarkplaces.git;a=blobdiff_plain;f=gl_backend.c;h=4c1cd30d7722ed41281e7ee53ed31144d6c045d1;hp=adb0fccff77576fa33ad5eb398498134718afcca;hb=281412c28688a491cc4124f0c5ec783a409df820;hpb=d57be67cb00229acb8564b92c8b7c58eeed8a0cb

diff --git a/gl_backend.c b/gl_backend.c
index adb0fccf..4c1cd30d 100644
--- a/gl_backend.c
+++ b/gl_backend.c
@@ -1,31 +1,115 @@
 
 #include "quakedef.h"
 
+cvar_t gl_mesh_maxtriangles = {0, "gl_mesh_maxtriangles", "1024"};
+cvar_t gl_mesh_batchtriangles = {0, "gl_mesh_batchtriangles", "0"};
+cvar_t gl_mesh_transtriangles = {0, "gl_mesh_transtriangles", "16384"};
+cvar_t gl_mesh_floatcolors = {0, "gl_mesh_floatcolors", "0"};
+cvar_t gl_mesh_drawmode = {CVAR_SAVE, "gl_mesh_drawmode", "3"};
+
+cvar_t r_render = {0, "r_render", "1"};
+cvar_t gl_dither = {CVAR_SAVE, "gl_dither", "1"}; // whether or not to use dithering
+cvar_t gl_lockarrays = {0, "gl_lockarrays", "1"};
+
+// this is used to increase gl_mesh_maxtriangles automatically if a mesh was
+// too large for the buffers in the previous frame
+int overflowedverts = 0;
+// increase transtriangles automatically too
+int overflowedtransverts = 0;
+
+int gl_maxdrawrangeelementsvertices;
+int gl_maxdrawrangeelementsindices;
+
+#ifdef DEBUGGL
+int errornumber = 0;
+
+void GL_PrintError(int errornumber, char *filename, int linenumber)
+{
+	switch(errornumber)
+	{
+#ifdef GL_INVALID_ENUM
+	case GL_INVALID_ENUM:
+		Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
+		break;
+#endif
+#ifdef GL_INVALID_VALUE
+	case GL_INVALID_VALUE:
+		Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
+		break;
+#endif
+#ifdef GL_INVALID_OPERATION
+	case GL_INVALID_OPERATION:
+		Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
+		break;
+#endif
+#ifdef GL_STACK_OVERFLOW
+	case GL_STACK_OVERFLOW:
+		Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
+		break;
+#endif
+#ifdef GL_STACK_UNDERFLOW
+	case GL_STACK_UNDERFLOW:
+		Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
+		break;
+#endif
+#ifdef GL_OUT_OF_MEMORY
+	case GL_OUT_OF_MEMORY:
+		Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
+		break;
+#endif
+#ifdef GL_TABLE_TOO_LARGE
+    case GL_TABLE_TOO_LARGE:
+		Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
+		break;
+#endif
+	default:
+		Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
+		break;
+	}
+}
+#endif
+
+float r_farclip, r_newfarclip;
+
+int polyindexarray[768];
+
+static float viewdist;
+
+int c_meshs, c_meshtris, c_transmeshs, c_transtris;
+
+int			lightscalebit;
+float		lightscale;
+float		overbrightscale;
+
+void SCR_ScreenShot_f (void);
+
 static int max_meshs;
+static int max_transmeshs;
 static int max_batch;
 static int max_verts; // always max_meshs * 3
+static int max_transverts; // always max_transmeshs * 3
 #define TRANSDEPTHRES 4096
 
-static cvar_t gl_mesh_maxtriangles = {0, "gl_mesh_maxtriangles", "21760"};
-static cvar_t gl_mesh_batchtriangles = {0, "gl_mesh_batchtriangles", "1024"};
-static cvar_t gl_mesh_merge = {0, "gl_mesh_merge", "1"};
-static cvar_t gl_mesh_floatcolors = {0, "gl_mesh_floatcolors", "1"};
-
 typedef struct buf_mesh_s
 {
-	struct buf_mesh_s *next;
 	int depthmask;
+	int depthtest;
 	int blendfunc1, blendfunc2;
 	int textures[MAX_TEXTUREUNITS];
-	float texturergbscale[MAX_TEXTUREUNITS];
+	int texturergbscale[MAX_TEXTUREUNITS];
 	int firsttriangle;
 	int triangles;
+	int firstvert;
+	int verts;
+	struct buf_mesh_s *chain;
+	struct buf_transtri_s *transchain;
 }
 buf_mesh_t;
 
 typedef struct buf_transtri_s
 {
 	struct buf_transtri_s *next;
+	struct buf_transtri_s *meshsortchain;
 	buf_mesh_t *mesh;
 	int index[3];
 }
@@ -51,7 +135,7 @@ buf_fcolor_t;
 
 typedef struct
 {
-	byte c[4];
+	qbyte c[4];
 }
 buf_bcolor_t;
 
@@ -62,7 +146,7 @@ typedef struct
 buf_texcoord_t;
 
 static float meshfarclip;
-static int currentmesh, currenttriangle, currentvertex, backendunits, backendactive, meshmerge, floatcolors, transranout;
+static int currentmesh, currenttriangle, currentvertex, backendunits, backendactive, transranout;
 static buf_mesh_t *buf_mesh;
 static buf_tri_t *buf_tri;
 static buf_vertex_t *buf_vertex;
@@ -72,51 +156,62 @@ static buf_texcoord_t *buf_texcoord[MAX_TEXTUREUNITS];
 
 static int currenttransmesh, currenttransvertex, currenttranstriangle;
 static buf_mesh_t *buf_transmesh;
-static buf_transtri_t *buf_transtri;
-static buf_transtri_t **buf_transtri_list;
+static buf_transtri_t *buf_sorttranstri;
+static buf_transtri_t **buf_sorttranstri_list;
+static buf_tri_t *buf_transtri;
 static buf_vertex_t *buf_transvertex;
 static buf_fcolor_t *buf_transfcolor;
-static buf_bcolor_t *buf_transbcolor;
 static buf_texcoord_t *buf_transtexcoord[MAX_TEXTUREUNITS];
 
 static mempool_t *gl_backend_mempool;
+static int resizingbuffers = false;
 
 static void gl_backend_start(void)
 {
 	int i;
 
+	qglGetIntegerv(GL_MAX_ELEMENTS_VERTICES, &gl_maxdrawrangeelementsvertices);
+	qglGetIntegerv(GL_MAX_ELEMENTS_INDICES, &gl_maxdrawrangeelementsindices);
+
+	Con_Printf("OpenGL Backend started with gl_mesh_maxtriangles %i, gl_mesh_transtriangles %i", gl_mesh_maxtriangles.integer, gl_mesh_transtriangles.integer);
+	if (qglDrawRangeElements != NULL)
+		Con_Printf(", with glDrawRangeElements (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices);
+	Con_Printf("\n");
+
 	max_verts = max_meshs * 3;
+	max_transverts = max_transmeshs * 3;
 
-	gl_backend_mempool = Mem_AllocPool("GL_Backend");
+	if (!gl_backend_mempool)
+		gl_backend_mempool = Mem_AllocPool("GL_Backend");
 
-#define BACKENDALLOC(var, count, sizeofstruct)\
+#define BACKENDALLOC(var, count, sizeofstruct, varname)\
 	{\
 		var = Mem_Alloc(gl_backend_mempool, count * sizeof(sizeofstruct));\
 		if (var == NULL)\
-			Sys_Error("gl_backend_start: unable to allocate memory\n");\
+			Sys_Error("gl_backend_start: unable to allocate memory for %s (%d bytes)\n", (varname), count * sizeof(sizeofstruct));\
 		memset(var, 0, count * sizeof(sizeofstruct));\
 	}
 
-	BACKENDALLOC(buf_mesh, max_meshs, buf_mesh_t)
-	BACKENDALLOC(buf_tri, max_meshs, buf_tri_t)
-	BACKENDALLOC(buf_vertex, max_verts, buf_vertex_t)
-	BACKENDALLOC(buf_fcolor, max_verts, buf_fcolor_t)
-	BACKENDALLOC(buf_bcolor, max_verts, buf_bcolor_t)
+	BACKENDALLOC(buf_mesh, max_meshs, buf_mesh_t, "buf_mesh")
+	BACKENDALLOC(buf_tri, max_meshs, buf_tri_t, "buf_tri")
+	BACKENDALLOC(buf_vertex, max_verts, buf_vertex_t, "buf_vertex")
+	BACKENDALLOC(buf_fcolor, max_verts, buf_fcolor_t, "buf_fcolor")
+	BACKENDALLOC(buf_bcolor, max_verts, buf_bcolor_t, "buf_bcolor")
 
-	BACKENDALLOC(buf_transmesh, max_meshs, buf_mesh_t)
-	BACKENDALLOC(buf_transtri, max_meshs, buf_transtri_t)
-	BACKENDALLOC(buf_transtri_list, TRANSDEPTHRES, buf_transtri_t *)
-	BACKENDALLOC(buf_transvertex, max_verts, buf_vertex_t)
-	BACKENDALLOC(buf_transfcolor, max_verts, buf_fcolor_t)
-	BACKENDALLOC(buf_transbcolor, max_verts, buf_bcolor_t)
+	BACKENDALLOC(buf_transmesh, max_transmeshs, buf_mesh_t, "buf_transmesh")
+	BACKENDALLOC(buf_sorttranstri, max_transmeshs, buf_transtri_t, "buf_sorttranstri")
+	BACKENDALLOC(buf_sorttranstri_list, TRANSDEPTHRES, buf_transtri_t *, "buf_sorttranstri_list")
+	BACKENDALLOC(buf_transtri, max_transmeshs, buf_tri_t, "buf_transtri")
+	BACKENDALLOC(buf_transvertex, max_transverts, buf_vertex_t, "buf_vertex")
+	BACKENDALLOC(buf_transfcolor, max_transverts, buf_fcolor_t, "buf_fcolor")
 
 	for (i = 0;i < MAX_TEXTUREUNITS;i++)
 	{
 		// only allocate as many texcoord arrays as we need
 		if (i < gl_textureunits)
 		{
-			BACKENDALLOC(buf_texcoord[i], max_verts, buf_texcoord_t)
-			BACKENDALLOC(buf_transtexcoord[i], max_verts, buf_texcoord_t)
+			BACKENDALLOC(buf_texcoord[i], max_verts, buf_texcoord_t, va("buf_texcoord[%d]", i))
+			BACKENDALLOC(buf_transtexcoord[i], max_transverts, buf_texcoord_t, va("buf_transtexcoord[%d]", i))
 		}
 		else
 		{
@@ -130,37 +225,12 @@ static void gl_backend_start(void)
 
 static void gl_backend_shutdown(void)
 {
-	int i;
-	/*
-#define BACKENDFREE(var)\
-	if (var)\
-	{\
-		Mem_Free(var);\
-		var = NULL;\
-	}
-	*/
-#define BACKENDFREE(var) var = NULL;
-
-	BACKENDFREE(buf_mesh)
-	BACKENDFREE(buf_tri)
-	BACKENDFREE(buf_vertex)
-	BACKENDFREE(buf_fcolor)
-	BACKENDFREE(buf_bcolor)
-
-	BACKENDFREE(buf_transmesh)
-	BACKENDFREE(buf_transtri)
-	BACKENDFREE(buf_transtri_list)
-	BACKENDFREE(buf_transvertex)
-	BACKENDFREE(buf_transfcolor)
-	BACKENDFREE(buf_transbcolor)
-
-	for (i = 0;i < MAX_TEXTUREUNITS;i++)
-	{
-		BACKENDFREE(buf_texcoord[i])
-		BACKENDFREE(buf_transtexcoord[i])
-	}
+	Con_Printf("OpenGL Backend shutting down\n");
 
-	Mem_FreePool(&gl_backend_mempool);
+	if (resizingbuffers)
+		Mem_EmptyPool(gl_backend_mempool);
+	else
+		Mem_FreePool(&gl_backend_mempool);
 
 	backendunits = 0;
 	backendactive = false;
@@ -168,47 +238,79 @@ static void gl_backend_shutdown(void)
 
 static void gl_backend_bufferchanges(int init)
 {
+	if (overflowedverts > gl_mesh_maxtriangles.integer * 3)
+		Cvar_SetValueQuick(&gl_mesh_maxtriangles, (int) ((overflowedverts + 2) / 3));
+	overflowedverts = 0;
+
+	if (overflowedtransverts > gl_mesh_transtriangles.integer * 3)
+		Cvar_SetValueQuick(&gl_mesh_transtriangles, (int) ((overflowedtransverts + 2) / 3));
+	overflowedtransverts = 0;
+
+	if (gl_mesh_drawmode.integer < 0)
+		Cvar_SetValueQuick(&gl_mesh_drawmode, 0);
+	if (gl_mesh_drawmode.integer > 3)
+		Cvar_SetValueQuick(&gl_mesh_drawmode, 3);
+
+	if (gl_mesh_drawmode.integer >= 3 && qglDrawRangeElements == NULL)
+	{
+		// change drawmode 3 to 2 if 3 won't work at all
+		Cvar_SetValueQuick(&gl_mesh_drawmode, 2);
+	}
+
 	// 21760 is (65536 / 3) rounded off to a multiple of 128
-	if (gl_mesh_maxtriangles.integer < 256)
-		Cvar_SetValue("gl_mesh_maxtriangles", 256);
+	if (gl_mesh_maxtriangles.integer < 1024)
+		Cvar_SetValueQuick(&gl_mesh_maxtriangles, 1024);
 	if (gl_mesh_maxtriangles.integer > 21760)
-		Cvar_SetValue("gl_mesh_maxtriangles", 21760);
+		Cvar_SetValueQuick(&gl_mesh_maxtriangles, 21760);
+
+	if (gl_mesh_transtriangles.integer < 1024)
+		Cvar_SetValueQuick(&gl_mesh_transtriangles, 1024);
+	if (gl_mesh_transtriangles.integer > 65536)
+		Cvar_SetValueQuick(&gl_mesh_transtriangles, 65536);
 
 	if (gl_mesh_batchtriangles.integer < 0)
-		Cvar_SetValue("gl_mesh_batchtriangles", 0);
+		Cvar_SetValueQuick(&gl_mesh_batchtriangles, 0);
 	if (gl_mesh_batchtriangles.integer > gl_mesh_maxtriangles.integer)
-		Cvar_SetValue("gl_mesh_batchtriangles", gl_mesh_maxtriangles.integer);
+		Cvar_SetValueQuick(&gl_mesh_batchtriangles, gl_mesh_maxtriangles.integer);
 
 	max_batch = gl_mesh_batchtriangles.integer;
 
-	if (max_meshs != gl_mesh_maxtriangles.integer)
+	if (max_meshs != gl_mesh_maxtriangles.integer || max_transmeshs != gl_mesh_transtriangles.integer)
 	{
 		max_meshs = gl_mesh_maxtriangles.integer;
+		max_transmeshs = gl_mesh_transtriangles.integer;
 
 		if (!init)
 		{
+			resizingbuffers = true;
 			gl_backend_shutdown();
 			gl_backend_start();
+			resizingbuffers = false;
 		}
 	}
 }
 
-float r_farclip, r_newfarclip;
-
 static void gl_backend_newmap(void)
 {
 	r_farclip = r_newfarclip = 2048.0f;
 }
 
-int polyindexarray[768];
-
 void gl_backend_init(void)
 {
 	int i;
+
+	Cvar_RegisterVariable(&r_render);
+	Cvar_RegisterVariable(&gl_dither);
+	Cvar_RegisterVariable(&gl_lockarrays);
+#ifdef NORENDER
+	Cvar_SetValue("r_render", 0);
+#endif
+
 	Cvar_RegisterVariable(&gl_mesh_maxtriangles);
+	Cvar_RegisterVariable(&gl_mesh_transtriangles);
 	Cvar_RegisterVariable(&gl_mesh_batchtriangles);
-	Cvar_RegisterVariable(&gl_mesh_merge);
 	Cvar_RegisterVariable(&gl_mesh_floatcolors);
+	Cvar_RegisterVariable(&gl_mesh_drawmode);
 	R_RegisterModule("GL_Backend", gl_backend_start, gl_backend_shutdown, gl_backend_newmap);
 	gl_backend_bufferchanges(true);
 	for (i = 0;i < 256;i++)
@@ -219,16 +321,186 @@ void gl_backend_init(void)
 	}
 }
 
-static float viewdist;
+int arraylocked = false;
+
+void GL_LockArray(int first, int count)
+{
+	if (!arraylocked && gl_supportslockarrays && gl_lockarrays.integer && gl_mesh_drawmode.integer > 0)
+	{
+		qglLockArraysEXT(first, count);
+		CHECKGLERROR
+		arraylocked = true;
+	}
+}
+
+void GL_UnlockArray(void)
+{
+	if (arraylocked)
+	{
+		qglUnlockArraysEXT();
+		CHECKGLERROR
+		arraylocked = false;
+	}
+}
+
+/*
+=============
+GL_SetupFrame
+=============
+*/
+static void GL_SetupFrame (void)
+{
+	double xmax, ymax;
+	double fovx, fovy, zNear, zFar, aspect;
+
+	// update farclip based on previous frame
+	r_farclip = r_newfarclip;
+
+	if (!r_render.integer)
+		return;
+
+	qglDepthFunc (GL_LEQUAL);CHECKGLERROR
+
+	// set up viewpoint
+	qglMatrixMode(GL_PROJECTION);CHECKGLERROR
+	qglLoadIdentity ();CHECKGLERROR
+
+	// y is weird beause OpenGL is bottom to top, we use top to bottom
+	qglViewport(r_refdef.x, vid.realheight - (r_refdef.y + r_refdef.height), r_refdef.width, r_refdef.height);CHECKGLERROR
+
+	// depth range
+	zNear = 1.0;
+	zFar = r_farclip;
+
+	// fov angles
+	fovx = r_refdef.fov_x;
+	fovy = r_refdef.fov_y;
+	aspect = r_refdef.width / r_refdef.height;
+
+	// pyramid slopes
+	xmax = zNear * tan(fovx * M_PI / 360.0) * aspect;
+	ymax = zNear * tan(fovy * M_PI / 360.0);
+
+	// set view pyramid
+	qglFrustum(-xmax, xmax, -ymax, ymax, zNear, zFar);CHECKGLERROR
 
-int c_meshtris;
+	qglMatrixMode(GL_MODELVIEW);CHECKGLERROR
+	qglLoadIdentity ();CHECKGLERROR
+
+	// put Z going up
+	qglRotatef (-90,  1, 0, 0);CHECKGLERROR
+	qglRotatef (90,  0, 0, 1);CHECKGLERROR
+	// camera rotation
+	qglRotatef (-r_refdef.viewangles[2],  1, 0, 0);CHECKGLERROR
+	qglRotatef (-r_refdef.viewangles[0],  0, 1, 0);CHECKGLERROR
+	qglRotatef (-r_refdef.viewangles[1],  0, 0, 1);CHECKGLERROR
+	// camera location
+	qglTranslatef (-r_refdef.vieworg[0],  -r_refdef.vieworg[1],  -r_refdef.vieworg[2]);CHECKGLERROR
+}
+
+static int mesh_blendfunc1;
+static int mesh_blendfunc2;
+static int mesh_blend;
+static GLboolean mesh_depthmask;
+static int mesh_depthtest;
+static int mesh_unit;
+static int mesh_clientunit;
+static int mesh_texture[MAX_TEXTUREUNITS];
+static float mesh_texturergbscale[MAX_TEXTUREUNITS];
+
+void GL_SetupTextureState(void)
+{
+	int i;
+	if (backendunits > 1)
+	{
+		for (i = 0;i < backendunits;i++)
+		{
+			qglActiveTexture(GL_TEXTURE0_ARB + (mesh_unit = i));CHECKGLERROR
+			qglBindTexture(GL_TEXTURE_2D, mesh_texture[i]);CHECKGLERROR
+			if (gl_combine.integer)
+			{
+				qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_CONSTANT_ARB);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, mesh_texturergbscale[i]);CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1);CHECKGLERROR
+			}
+			else
+			{
+				qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
+			}
+			if (mesh_texture[i])
+			{
+				qglEnable(GL_TEXTURE_2D);CHECKGLERROR
+			}
+			else
+			{
+				qglDisable(GL_TEXTURE_2D);CHECKGLERROR
+			}
+			if (gl_mesh_drawmode.integer > 0)
+			{
+				qglClientActiveTexture(GL_TEXTURE0_ARB + (mesh_clientunit = i));CHECKGLERROR
+				qglTexCoordPointer(2, GL_FLOAT, sizeof(buf_texcoord_t), buf_texcoord[i]);CHECKGLERROR
+				if (mesh_texture[i])
+				{
+					qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
+				}
+				else
+				{
+					qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
+				}
+			}
+		}
+	}
+	else
+	{
+		qglBindTexture(GL_TEXTURE_2D, mesh_texture[0]);CHECKGLERROR
+		qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
+		if (mesh_texture[0])
+		{
+			qglEnable(GL_TEXTURE_2D);CHECKGLERROR
+		}
+		else
+		{
+			qglDisable(GL_TEXTURE_2D);CHECKGLERROR
+		}
+		if (gl_mesh_drawmode.integer > 0)
+		{
+			qglTexCoordPointer(2, GL_FLOAT, sizeof(buf_texcoord_t), buf_texcoord[0]);CHECKGLERROR
+			if (mesh_texture[0])
+			{
+				qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
+			}
+			else
+			{
+				qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
+			}
+		}
+	}
+}
 
 // called at beginning of frame
-void R_Mesh_Clear(void)
+int usedarrays;
+void R_Mesh_Start(void)
 {
+	int i;
 	if (!backendactive)
 		Sys_Error("R_Mesh_Clear: called when backend is not active\n");
 
+	CHECKGLERROR
+
 	gl_backend_bufferchanges(false);
 
 	currentmesh = 0;
@@ -238,439 +510,459 @@ void R_Mesh_Clear(void)
 	currenttranstriangle = 0;
 	currenttransvertex = 0;
 	meshfarclip = 0;
-	meshmerge = gl_mesh_merge.integer;
-	floatcolors = gl_mesh_floatcolors.integer;
 	transranout = false;
 	viewdist = DotProduct(r_origin, vpn);
 
+	c_meshs = 0;
 	c_meshtris = 0;
-}
+	c_transmeshs = 0;
+	c_transtris = 0;
 
-#ifdef DEBUGGL
-void GL_PrintError(int errornumber, char *filename, int linenumber)
-{
-	switch(errornumber)
+	GL_SetupFrame();
+
+	mesh_unit = 0;
+	mesh_clientunit = 0;
+
+	for (i = 0;i < backendunits;i++)
 	{
-	case GL_INVALID_ENUM:
-		Con_Printf("GL_INVALID_ENUM at %s:%i\n", filename, linenumber);
-		break;
-	case GL_INVALID_VALUE:
-		Con_Printf("GL_INVALID_VALUE at %s:%i\n", filename, linenumber);
-		break;
-	case GL_INVALID_OPERATION:
-		Con_Printf("GL_INVALID_OPERATION at %s:%i\n", filename, linenumber);
-		break;
-	case GL_STACK_OVERFLOW:
-		Con_Printf("GL_STACK_OVERFLOW at %s:%i\n", filename, linenumber);
-		break;
-	case GL_STACK_UNDERFLOW:
-		Con_Printf("GL_STACK_UNDERFLOW at %s:%i\n", filename, linenumber);
-		break;
-	case GL_OUT_OF_MEMORY:
-		Con_Printf("GL_OUT_OF_MEMORY at %s:%i\n", filename, linenumber);
-		break;
-	case GL_TABLE_TOO_LARGE:
-		Con_Printf("GL_TABLE_TOO_LARGE at %s:%i\n", filename, linenumber);
-		break;
-	default:
-		Con_Printf("GL UNKNOWN (%i) at %s:%i\n", errornumber, filename, linenumber);
-		break;
+		mesh_texture[i] = 0;
+		mesh_texturergbscale[i] = 1;
+	}
+
+	qglEnable(GL_CULL_FACE);CHECKGLERROR
+	qglCullFace(GL_FRONT);CHECKGLERROR
+
+	mesh_depthtest = true;
+	qglEnable(GL_DEPTH_TEST);CHECKGLERROR
+
+	mesh_blendfunc1 = GL_ONE;
+	mesh_blendfunc2 = GL_ZERO;
+	qglBlendFunc(mesh_blendfunc1, mesh_blendfunc2);CHECKGLERROR
+
+	mesh_blend = 0;
+	qglDisable(GL_BLEND);CHECKGLERROR
+
+	mesh_depthmask = GL_TRUE;
+	qglDepthMask(mesh_depthmask);CHECKGLERROR
+
+	usedarrays = false;
+	if (gl_mesh_drawmode.integer > 0)
+	{
+		usedarrays = true;
+		qglVertexPointer(3, GL_FLOAT, sizeof(buf_vertex_t), &buf_vertex[0].v[0]);CHECKGLERROR
+		qglEnableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
+		if (gl_mesh_floatcolors.integer)
+		{
+			qglColorPointer(4, GL_FLOAT, sizeof(buf_fcolor_t), &buf_fcolor[0].c[0]);CHECKGLERROR
+		}
+		else
+		{
+			qglColorPointer(4, GL_UNSIGNED_BYTE, sizeof(buf_bcolor_t), &buf_bcolor[0].c[0]);CHECKGLERROR
+		}
+		qglEnableClientState(GL_COLOR_ARRAY);CHECKGLERROR
 	}
+
+	GL_SetupTextureState();
 }
 
-int errornumber = 0;
-#endif
+int gl_backend_rebindtextures;
 
-// renders mesh buffers, called to flush buffers when full
-void R_Mesh_Render(void)
+void GL_UpdateFarclip(void)
 {
-	int i, k, blendfunc1, blendfunc2, blend, depthmask, unit = 0, clientunit = 0, firsttriangle, triangles, texture[MAX_TEXTUREUNITS];
-	float farclip, texturergbscale[MAX_TEXTUREUNITS];
-	buf_mesh_t *mesh;
-	if (!backendactive)
-		Sys_Error("R_Mesh_Render: called when backend is not active\n");
-	if (!currentmesh)
-		return;
+	int i;
+	float farclip;
 
-CHECKGLERROR
+	// push out farclip based on vertices
+	// FIXME: wouldn't this be slow when using matrix transforms?
+	for (i = 0;i < currentvertex;i++)
+	{
+		farclip = DotProduct(buf_vertex[i].v, vpn);
+		if (meshfarclip < farclip)
+			meshfarclip = farclip;
+	}
 
 	farclip = meshfarclip + 256.0f - viewdist; // + 256 just to be safe
 
 	// push out farclip for next frame
 	if (farclip > r_newfarclip)
 		r_newfarclip = ceil((farclip + 255) / 256) * 256 + 256;
+}
 
-	for (i = 0;i < backendunits;i++)
-		texturergbscale[i] = 1;
-
-	glEnable(GL_CULL_FACE);
-CHECKGLERROR
-	glCullFace(GL_FRONT);
-CHECKGLERROR
-	glEnable(GL_DEPTH_TEST);
-CHECKGLERROR
-	blendfunc1 = GL_ONE;
-	blendfunc2 = GL_ZERO;
-	glBlendFunc(blendfunc1, blendfunc2);
-CHECKGLERROR
-	blend = 0;
-	glDisable(GL_BLEND);
-CHECKGLERROR
-	depthmask = 1;
-	glDepthMask(depthmask);
-CHECKGLERROR
-
-CHECKGLERROR
-	glVertexPointer(3, GL_FLOAT, sizeof(buf_vertex_t), buf_vertex);
-CHECKGLERROR
-	glEnableClientState(GL_VERTEX_ARRAY);
-CHECKGLERROR
-	if (floatcolors)
-	{
-		glColorPointer(4, GL_FLOAT, sizeof(buf_fcolor_t), buf_fcolor);
-CHECKGLERROR
+void GL_ConvertColorsFloatToByte(void)
+{
+	int i, k, total;
+	// LordHavoc: to avoid problems with aliasing (treating memory as two
+	// different types - exactly what this is doing), these must be volatile
+	// (or a union)
+	volatile int *icolor;
+	volatile float *fcolor;
+	qbyte *bcolor;
+
+	total = currentvertex * 4;
+
+	// shift float to have 8bit fraction at base of number
+	fcolor = &buf_fcolor->c[0];
+	for (i = 0;i < total;)
+	{
+		fcolor[i    ] += 32768.0f;
+		fcolor[i + 1] += 32768.0f;
+		fcolor[i + 2] += 32768.0f;
+		fcolor[i + 3] += 32768.0f;
+		i += 4;
 	}
-	else
+
+	// then read as integer and kill float bits...
+	icolor = (int *)&buf_fcolor->c[0];
+	bcolor = &buf_bcolor->c[0];
+	for (i = 0;i < total;)
 	{
-		glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(buf_bcolor_t), buf_bcolor);
-CHECKGLERROR
+		k = icolor[i    ] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i    ] = (qbyte) k;
+		k = icolor[i + 1] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 1] = (qbyte) k;
+		k = icolor[i + 2] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 2] = (qbyte) k;
+		k = icolor[i + 3] & 0x7FFFFF;if (k > 255) k = 255;bcolor[i + 3] = (qbyte) k;
+		i += 4;
 	}
-	glEnableClientState(GL_COLOR_ARRAY);
-CHECKGLERROR
+}
 
+void GL_MeshState(buf_mesh_t *mesh)
+{
+	int i;
 	if (backendunits > 1)
 	{
 		for (i = 0;i < backendunits;i++)
 		{
-			glActiveTextureARB(GL_TEXTURE0_ARB + (unit = i));
-CHECKGLERROR
-			glBindTexture(GL_TEXTURE_2D, (texture[i] = 0));
-CHECKGLERROR
-			glDisable(GL_TEXTURE_2D);
-CHECKGLERROR
-			if (gl_combine.integer)
+			if (mesh_texture[i] != mesh->textures[i])
 			{
-				glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_CONSTANT_ARB);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB, GL_SRC_COLOR);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_ARB, GL_SRC_COLOR);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_ARB, GL_SRC_ALPHA);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_MODULATE);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_ARB, GL_CONSTANT_ARB);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB, GL_SRC_ALPHA);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB, GL_SRC_ALPHA);
-CHECKGLERROR
-				glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_ARB, GL_SRC_ALPHA);
-CHECKGLERROR
-				glTexEnvf(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1.0f);
-CHECKGLERROR
-				glTexEnvf(GL_TEXTURE_ENV, GL_ALPHA_SCALE, 1.0f);
-CHECKGLERROR
+				if (mesh_unit != i)
+				{
+					qglActiveTexture(GL_TEXTURE0_ARB + (mesh_unit = i));CHECKGLERROR
+				}
+				if (mesh_texture[i] == 0)
+				{
+					qglEnable(GL_TEXTURE_2D);CHECKGLERROR
+					// have to disable texcoord array on disabled texture
+					// units due to NVIDIA driver bug with
+					// compiled_vertex_array
+					if (mesh_clientunit != i)
+					{
+						qglClientActiveTexture(GL_TEXTURE0_ARB + (mesh_clientunit = i));CHECKGLERROR
+					}
+					qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
+				}
+				qglBindTexture(GL_TEXTURE_2D, (mesh_texture[i] = mesh->textures[i]));CHECKGLERROR
+				if (mesh_texture[i] == 0)
+				{
+					qglDisable(GL_TEXTURE_2D);CHECKGLERROR
+					// have to disable texcoord array on disabled texture
+					// units due to NVIDIA driver bug with
+					// compiled_vertex_array
+					if (mesh_clientunit != i)
+					{
+						qglClientActiveTexture(GL_TEXTURE0_ARB + (mesh_clientunit = i));CHECKGLERROR
+					}
+					qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
+				}
 			}
-			else
+			if (mesh_texturergbscale[i] != mesh->texturergbscale[i])
 			{
-				glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-CHECKGLERROR
+				if (mesh_unit != i)
+				{
+					qglActiveTexture(GL_TEXTURE0_ARB + (mesh_unit = i));CHECKGLERROR
+				}
+				qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (mesh_texturergbscale[i] = mesh->texturergbscale[i]));CHECKGLERROR
 			}
-
-			glClientActiveTextureARB(GL_TEXTURE0_ARB + (clientunit = i));
-CHECKGLERROR
-			glTexCoordPointer(2, GL_FLOAT, sizeof(buf_texcoord_t), buf_texcoord[i]);
-CHECKGLERROR
-			glEnableClientState(GL_TEXTURE_COORD_ARRAY);
-CHECKGLERROR
 		}
 	}
 	else
 	{
-		glBindTexture(GL_TEXTURE_2D, (texture[0] = 0));
-CHECKGLERROR
-		glDisable(GL_TEXTURE_2D);
-CHECKGLERROR
-		glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-CHECKGLERROR
-
-		glTexCoordPointer(2, GL_FLOAT, sizeof(buf_texcoord_t), buf_texcoord[0]);
-CHECKGLERROR
-		glEnableClientState(GL_TEXTURE_COORD_ARRAY);
-CHECKGLERROR
+		if (mesh_texture[0] != mesh->textures[0])
+		{
+			if (mesh_texture[0] == 0)
+			{
+				qglEnable(GL_TEXTURE_2D);CHECKGLERROR
+				qglEnableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
+			}
+			qglBindTexture(GL_TEXTURE_2D, (mesh_texture[0] = mesh->textures[0]));CHECKGLERROR
+			if (mesh_texture[0] == 0)
+			{
+				qglDisable(GL_TEXTURE_2D);CHECKGLERROR
+				qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
+			}
+		}
 	}
-
-	// lock as early as possible
-	GL_LockArray(0, currentvertex);
-CHECKGLERROR
-
-	for (k = 0;k < currentmesh;)
+	if (mesh_blendfunc1 != mesh->blendfunc1 || mesh_blendfunc2 != mesh->blendfunc2)
 	{
-		mesh = &buf_mesh[k];
-
-		if (backendunits > 1)
+		qglBlendFunc(mesh_blendfunc1 = mesh->blendfunc1, mesh_blendfunc2 = mesh->blendfunc2);CHECKGLERROR
+		if (mesh_blendfunc2 == GL_ZERO)
 		{
-//			int topunit = 0;
-			for (i = 0;i < backendunits;i++)
+			if (mesh_blendfunc1 == GL_ONE)
 			{
-				if (texture[i] != mesh->textures[i])
+				if (mesh_blend)
 				{
-					if (unit != i)
-					{
-						glActiveTextureARB(GL_TEXTURE0_ARB + (unit = i));
-CHECKGLERROR
-					}
-					if (texture[i] == 0)
-					{
-						glEnable(GL_TEXTURE_2D);
-CHECKGLERROR
-						// have to disable texcoord array on disabled texture
-						// units due to NVIDIA driver bug with
-						// compiled_vertex_array
-						if (clientunit != i)
-						{
-							glClientActiveTextureARB(GL_TEXTURE0_ARB + (clientunit = i));
-CHECKGLERROR
-						}
-						glEnableClientState(GL_TEXTURE_COORD_ARRAY);
-CHECKGLERROR
-					}
-					glBindTexture(GL_TEXTURE_2D, (texture[i] = mesh->textures[i]));
-CHECKGLERROR
-					if (texture[i] == 0)
-					{
-						glDisable(GL_TEXTURE_2D);
-CHECKGLERROR
-						// have to disable texcoord array on disabled texture
-						// units due to NVIDIA driver bug with
-						// compiled_vertex_array
-						if (clientunit != i)
-						{
-							glClientActiveTextureARB(GL_TEXTURE0_ARB + (clientunit = i));
-CHECKGLERROR
-						}
-						glDisableClientState(GL_TEXTURE_COORD_ARRAY);
-CHECKGLERROR
-					}
+					mesh_blend = 0;
+					qglDisable(GL_BLEND);CHECKGLERROR
 				}
-				if (texturergbscale[i] != mesh->texturergbscale[i])
+			}
+			else
+			{
+				if (!mesh_blend)
 				{
-					if (unit != i)
-					{
-						glActiveTextureARB(GL_TEXTURE0_ARB + (unit = i));
-CHECKGLERROR
-					}
-					glTexEnvf(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, (texturergbscale[i] = mesh->texturergbscale[i]));
-CHECKGLERROR
+					mesh_blend = 1;
+					qglEnable(GL_BLEND);CHECKGLERROR
 				}
-//				if (texture[i])
-//					topunit = i;
 			}
-//			if (unit != topunit)
-//			{
-//				glActiveTextureARB(GL_TEXTURE0_ARB + (unit = topunit));
-//CHECKGLERROR
-//			}
 		}
 		else
 		{
-			if (texture[0] != mesh->textures[0])
+			if (!mesh_blend)
 			{
-				if (texture[0] == 0)
-				{
-					glEnable(GL_TEXTURE_2D);
-CHECKGLERROR
-					glEnableClientState(GL_TEXTURE_COORD_ARRAY);
-CHECKGLERROR
-				}
-				glBindTexture(GL_TEXTURE_2D, (texture[0] = mesh->textures[0]));
-CHECKGLERROR
-				if (texture[0] == 0)
-				{
-					glDisable(GL_TEXTURE_2D);
-CHECKGLERROR
-					glDisableClientState(GL_TEXTURE_COORD_ARRAY);
-CHECKGLERROR
-				}
+				mesh_blend = 1;
+				qglEnable(GL_BLEND);CHECKGLERROR
 			}
 		}
-		if (blendfunc1 != mesh->blendfunc1 || blendfunc2 != mesh->blendfunc2)
+	}
+	if (mesh_depthtest != mesh->depthtest)
+	{
+		mesh_depthtest = mesh->depthtest;
+		if (mesh_depthtest)
+			qglEnable(GL_DEPTH_TEST);
+		else
+			qglDisable(GL_DEPTH_TEST);
+	}
+	if (mesh_depthmask != mesh->depthmask)
+	{
+		qglDepthMask(mesh_depthmask = mesh->depthmask);CHECKGLERROR
+	}
+}
+
+void GL_DrawRangeElements(int firstvert, int endvert, int indexcount, GLuint *index)
+{
+	unsigned int i, j, in;
+	if (gl_mesh_drawmode.integer >= 3/* && (endvert - firstvert) <= gl_maxdrawrangeelementsvertices && (indexcount) <= gl_maxdrawrangeelementsindices*/)
+	{
+		// GL 1.2 or GL 1.1 with extension
+		qglDrawRangeElements(GL_TRIANGLES, firstvert, endvert, indexcount, GL_UNSIGNED_INT, index);
+	}
+	else if (gl_mesh_drawmode.integer >= 2)
+	{
+		// GL 1.1
+		qglDrawElements(GL_TRIANGLES, indexcount, GL_UNSIGNED_INT, index);
+	}
+	else if (gl_mesh_drawmode.integer >= 1)
+	{
+		// GL 1.1
+		// feed it manually using glArrayElement
+		qglBegin(GL_TRIANGLES);
+		for (i = 0;i < indexcount;i++)
+			qglArrayElement(index[i]);
+		qglEnd();
+	}
+	else
+	{
+		// GL 1.1 but not using vertex arrays - 3dfx glquake minigl driver
+		// feed it manually
+		qglBegin(GL_TRIANGLES);
+		if (r_multitexture.integer)
 		{
-			blendfunc1 = mesh->blendfunc1;
-			blendfunc2 = mesh->blendfunc2;
-			glBlendFunc(blendfunc1, blendfunc2);
-CHECKGLERROR
-			if (blendfunc2 == GL_ZERO)
-			{
-				if (blendfunc1 == GL_ONE)
-				{
-					if (blend)
-					{
-						blend = 0;
-						glDisable(GL_BLEND);
-CHECKGLERROR
-					}
-				}
-				else
-				{
-					if (!blend)
-					{
-						blend = 1;
-						glEnable(GL_BLEND);
-CHECKGLERROR
-					}
-				}
-			}
-			else
+			// the minigl doesn't have this (because it does not have ARB_multitexture)
+			for (i = 0;i < indexcount;i++)
 			{
-				if (!blend)
-				{
-					blend = 1;
-					glEnable(GL_BLEND);
-CHECKGLERROR
-				}
+				in = index[i];
+				qglColor4ub(buf_bcolor[in].c[0], buf_bcolor[in].c[1], buf_bcolor[in].c[2], buf_bcolor[in].c[3]);
+				for (j = 0;j < backendunits;j++)
+					if (mesh_texture[j])
+						qglMultiTexCoord2f(GL_TEXTURE0_ARB + j, buf_texcoord[j][in].t[0], buf_texcoord[j][in].t[1]);
+				qglVertex3f(buf_vertex[in].v[0], buf_vertex[in].v[1], buf_vertex[in].v[2]);
 			}
 		}
-		if (depthmask != mesh->depthmask)
-		{
-			depthmask = mesh->depthmask;
-			glDepthMask(depthmask);
-CHECKGLERROR
-		}
-
-		firsttriangle = mesh->firsttriangle;
-		triangles = mesh->triangles;
-		mesh = &buf_mesh[++k];
-
-		if (meshmerge)
-		{
-			#if MAX_TEXTUREUNITS != 4
-			#error update this code
-			#endif
-			while (k < currentmesh
-				&& mesh->blendfunc1 == blendfunc1
-				&& mesh->blendfunc2 == blendfunc2
-				&& mesh->depthmask == depthmask
-				&& mesh->textures[0] == texture[0]
-				&& mesh->textures[1] == texture[1]
-				&& mesh->textures[2] == texture[2]
-				&& mesh->textures[3] == texture[3]
-				&& mesh->texturergbscale[0] == texturergbscale[0]
-				&& mesh->texturergbscale[1] == texturergbscale[1]
-				&& mesh->texturergbscale[2] == texturergbscale[2]
-				&& mesh->texturergbscale[3] == texturergbscale[3])
+		else
+		{
+			for (i = 0;i < indexcount;i++)
 			{
-				triangles += mesh->triangles;
-				mesh = &buf_mesh[++k];
+				in = index[i];
+				qglColor4ub(buf_bcolor[in].c[0], buf_bcolor[in].c[1], buf_bcolor[in].c[2], buf_bcolor[in].c[3]);
+				if (mesh_texture[0])
+					qglTexCoord2f(buf_texcoord[0][in].t[0], buf_texcoord[0][in].t[1]);
+				qglVertex3f(buf_vertex[in].v[0], buf_vertex[in].v[1], buf_vertex[in].v[2]);
 			}
 		}
+		qglEnd();
+	}
+}
+
+// renders mesh buffers, called to flush buffers when full
+void R_Mesh_Render(void)
+{
+	int i;
+	int k;
+	int indexcount;
+	int firstvert;
+	buf_mesh_t *mesh;
+	unsigned int *index;
+
+	if (!backendactive)
+		Sys_Error("R_Mesh_Render: called when backend is not active\n");
+
+	if (!currentmesh)
+		return;
+
+	if (!r_render.integer)
+	{
+		currentmesh = 0;
+		currenttriangle = 0;
+		currentvertex = 0;
+		return;
+	}
+
+	CHECKGLERROR
+
+	GL_UpdateFarclip();
+
+	// drawmode 0 always uses byte colors
+	if (!gl_mesh_floatcolors.integer || gl_mesh_drawmode.integer <= 0)
+		GL_ConvertColorsFloatToByte();
+
+	if (gl_backend_rebindtextures)
+	{
+		gl_backend_rebindtextures = false;
+		GL_SetupTextureState();
+	}
+
+	GL_MeshState(buf_mesh);
+	GL_LockArray(0, currentvertex);
+	GL_DrawRangeElements(buf_mesh->firstvert, buf_mesh->firstvert + buf_mesh->verts, buf_mesh->triangles * 3, (unsigned int *)&buf_tri[buf_mesh->firsttriangle].index[0]);CHECKGLERROR
+
+	if (currentmesh >= 2)
+	{
+		for (k = 1, mesh = buf_mesh + k;k < currentmesh;k++, mesh++)
+		{
+			GL_MeshState(mesh);
+
+			firstvert = mesh->firstvert;
+			indexcount = mesh->triangles * 3;
+			index = (unsigned int *)&buf_tri[mesh->firsttriangle].index[0];
+
+			// if not using batching, skip the index adjustment
+			if (firstvert != 0)
+				for (i = 0;i < indexcount;i++)
+					index[i] += firstvert;
 
-		glDrawElements(GL_TRIANGLES, triangles * 3, GL_UNSIGNED_INT, (unsigned int *)&buf_tri[firsttriangle]);
-CHECKGLERROR
+			GL_DrawRangeElements(firstvert, firstvert + mesh->verts, indexcount, index);CHECKGLERROR
+		}
 	}
 
 	currentmesh = 0;
 	currenttriangle = 0;
 	currentvertex = 0;
 
-	GL_UnlockArray();
-CHECKGLERROR
+	GL_UnlockArray();CHECKGLERROR
+}
+
+// restores backend state, used when done with 3D rendering
+void R_Mesh_Finish(void)
+{
+	int i;
+	// flush any queued meshs
+	R_Mesh_Render();
 
 	if (backendunits > 1)
 	{
 		for (i = backendunits - 1;i >= 0;i--)
 		{
-			glActiveTextureARB(GL_TEXTURE0_ARB + (unit = i));
-CHECKGLERROR
-			glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-CHECKGLERROR
+			qglActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
+			qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
 			if (gl_combine.integer)
 			{
-				glTexEnvf(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1.0f);
-CHECKGLERROR
+				qglTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 1);CHECKGLERROR
 			}
 			if (i > 0)
 			{
-				glDisable(GL_TEXTURE_2D);
-CHECKGLERROR
+				qglDisable(GL_TEXTURE_2D);CHECKGLERROR
 			}
 			else
 			{
-				glEnable(GL_TEXTURE_2D);
-CHECKGLERROR
+				qglEnable(GL_TEXTURE_2D);CHECKGLERROR
 			}
-			glBindTexture(GL_TEXTURE_2D, 0);
-CHECKGLERROR
+			qglBindTexture(GL_TEXTURE_2D, 0);CHECKGLERROR
 
-			glClientActiveTextureARB(GL_TEXTURE0_ARB + (clientunit = i));
-CHECKGLERROR
-			glDisableClientState(GL_TEXTURE_COORD_ARRAY);
-CHECKGLERROR
+			if (usedarrays)
+			{
+				qglClientActiveTexture(GL_TEXTURE0_ARB + i);CHECKGLERROR
+				qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
+			}
 		}
 	}
 	else
 	{
-		glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-CHECKGLERROR
-		glEnable(GL_TEXTURE_2D);
-CHECKGLERROR
-		glDisableClientState(GL_TEXTURE_COORD_ARRAY);
-CHECKGLERROR
+		qglTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);CHECKGLERROR
+		qglEnable(GL_TEXTURE_2D);CHECKGLERROR
+		if (usedarrays)
+		{
+			qglDisableClientState(GL_TEXTURE_COORD_ARRAY);CHECKGLERROR
+		}
+	}
+	if (usedarrays)
+	{
+		qglDisableClientState(GL_COLOR_ARRAY);CHECKGLERROR
+		qglDisableClientState(GL_VERTEX_ARRAY);CHECKGLERROR
 	}
-	glDisableClientState(GL_COLOR_ARRAY);
-CHECKGLERROR
-	glDisableClientState(GL_VERTEX_ARRAY);
-CHECKGLERROR
 
-	glDisable(GL_BLEND);
-CHECKGLERROR
-	glDepthMask(1);
-CHECKGLERROR
-	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-CHECKGLERROR
+	qglDisable(GL_BLEND);CHECKGLERROR
+	qglEnable(GL_DEPTH_TEST);CHECKGLERROR
+	qglDepthMask(GL_TRUE);CHECKGLERROR
+	qglBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);CHECKGLERROR
+}
+
+void R_Mesh_ClearDepth(void)
+{
+	R_Mesh_AddTransparent();
+	R_Mesh_Finish();
+	qglClear(GL_DEPTH_BUFFER_BIT);
+	R_Mesh_Start();
 }
 
 void R_Mesh_AddTransparent(void)
 {
-	int i, j, k;
+	int i, j, k, *index;
 	float viewdistcompare, centerscaler, dist1, dist2, dist3, center, maxdist;
 	buf_vertex_t *vert1, *vert2, *vert3;
 	buf_transtri_t *tri;
-	buf_mesh_t *mesh;
+	buf_mesh_t *mesh, *transmesh;
 
-	// process and add transparent mesh triangles
-	if (!currenttranstriangle)
+	if (!currenttransmesh)
 		return;
 
+	// convert index data to transtris for sorting
+	for (j = 0;j < currenttransmesh;j++)
+	{
+		mesh = buf_transmesh + j;
+		k = mesh->firsttriangle;
+		index = &buf_transtri[k].index[0];
+		for (i = 0;i < mesh->triangles;i++)
+		{
+			tri = &buf_sorttranstri[k++];
+			tri->mesh = mesh;
+			tri->index[0] = *index++;
+			tri->index[1] = *index++;
+			tri->index[2] = *index++;
+		}
+	}
+
 	// map farclip to 0-4095 list range
 	centerscaler = (TRANSDEPTHRES / r_farclip) * (1.0f / 3.0f);
 	viewdistcompare = viewdist + 4.0f;
 
-	memset(buf_transtri_list, 0, TRANSDEPTHRES * sizeof(buf_transtri_t *));
+	memset(buf_sorttranstri_list, 0, TRANSDEPTHRES * sizeof(buf_transtri_t *));
 
-	// process in reverse because transtri_list adding code is in reverse as well
 	k = 0;
-	for (j = currenttranstriangle - 1;j >= 0;j--)
+	for (j = 0;j < currenttranstriangle;j++)
 	{
-		tri = &buf_transtri[j];
+		tri = &buf_sorttranstri[j];
+		i = tri->mesh->firstvert;
 
-		vert1 = &buf_transvertex[tri->index[0]];
-		vert2 = &buf_transvertex[tri->index[1]];
-		vert3 = &buf_transvertex[tri->index[2]];
+		vert1 = &buf_transvertex[tri->index[0] + i];
+		vert2 = &buf_transvertex[tri->index[1] + i];
+		vert3 = &buf_transvertex[tri->index[2] + i];
 
 		dist1 = DotProduct(vert1->v, vpn);
 		dist2 = DotProduct(vert2->v, vpn);
@@ -688,45 +980,60 @@ void R_Mesh_AddTransparent(void)
 		if (center < 0.0f)
 			center = 0.0f;
 		center += 8388608.0f;
-		i = *((long *)&center) & 0x7FFFFF;
+		i = *((int *)&center) & 0x7FFFFF;
 		i = min(i, (TRANSDEPTHRES - 1));
 #endif
-		tri->next = buf_transtri_list[i];
-		buf_transtri_list[i] = tri;
+		tri->next = buf_sorttranstri_list[i];
+		buf_sorttranstri_list[i] = tri;
 		k++;
 	}
 
-	if (currentmesh + k > max_meshs || currenttriangle + k > max_batch || currentvertex + currenttransvertex > max_verts)
-		R_Mesh_Render();
-
-	// note: can't batch these because they can be rendered in any order
-	// there can never be more transparent triangles than fit in main buffers
-	memcpy(&buf_vertex[currentvertex], &buf_transvertex[0], currenttransvertex * sizeof(buf_vertex_t));
-	if (floatcolors)
-		memcpy(&buf_fcolor[currentvertex], &buf_transfcolor[0], currenttransvertex * sizeof(buf_fcolor_t));
-	else
-		memcpy(&buf_fcolor[currentvertex], &buf_transbcolor[0], currenttransvertex * sizeof(buf_bcolor_t));
-	for (i = 0;i < backendunits;i++)
-		memcpy(&buf_texcoord[i][currentvertex], &buf_transtexcoord[i][0], currenttransvertex * sizeof(buf_texcoord_t));
-
-	for (j = TRANSDEPTHRES - 1;j >= 0;j--)
+	for (i = 0;i < currenttransmesh;i++)
+		buf_transmesh[i].transchain = NULL;
+	transmesh = NULL;
+	for (j = 0;j < TRANSDEPTHRES;j++)
 	{
-		if ((tri = buf_transtri_list[j]))
+		if ((tri = buf_sorttranstri_list[j]))
 		{
-			while(tri)
+			for (;tri;tri = tri->next)
 			{
-				mesh = &buf_mesh[currentmesh++];
-				*mesh = *tri->mesh; // copy mesh properties
-				buf_tri[currenttriangle].index[0] = tri->index[0] + currentvertex;
-				buf_tri[currenttriangle].index[1] = tri->index[1] + currentvertex;
-				buf_tri[currenttriangle].index[2] = tri->index[2] + currentvertex;
-				mesh->firsttriangle = currenttriangle++;
-				mesh->triangles = 1;
-				tri = tri->next;
+				if (!tri->mesh->transchain)
+				{
+					tri->mesh->chain = transmesh;
+					transmesh = tri->mesh;
+				}
+				tri->meshsortchain = tri->mesh->transchain;
+				tri->mesh->transchain = tri;
 			}
 		}
 	}
-	currentvertex += currenttransvertex;
+
+	for (;transmesh;transmesh = transmesh->chain)
+	{
+		if (currentmesh >= max_meshs || currenttriangle + transmesh->triangles > max_batch || currenttriangle + transmesh->triangles > 1024 || currentvertex + transmesh->verts > max_verts)
+			R_Mesh_Render();
+
+		mesh = &buf_mesh[currentmesh++];
+		*mesh = *transmesh; // copy mesh properties
+
+		mesh->firstvert = currentvertex;
+		memcpy(&buf_vertex[currentvertex], &buf_transvertex[transmesh->firstvert], transmesh->verts * sizeof(buf_vertex_t));
+		memcpy(&buf_fcolor[currentvertex], &buf_transfcolor[transmesh->firstvert], transmesh->verts * sizeof(buf_fcolor_t));
+		for (i = 0;i < backendunits && transmesh->textures[i];i++)
+			memcpy(&buf_texcoord[i][currentvertex], &buf_transtexcoord[i][transmesh->firstvert], transmesh->verts * sizeof(buf_texcoord_t));
+		currentvertex += mesh->verts;
+
+		mesh->firsttriangle = currenttriangle;
+		for (tri = transmesh->transchain;tri;tri = tri->meshsortchain)
+		{
+			buf_tri[currenttriangle].index[0] = tri->index[0];
+			buf_tri[currenttriangle].index[1] = tri->index[1];
+			buf_tri[currenttriangle].index[2] = tri->index[2];
+			currenttriangle++;
+		}
+		mesh->triangles = currenttriangle - mesh->firsttriangle;
+	}
+
 	currenttransmesh = 0;
 	currenttranstriangle = 0;
 	currenttransvertex = 0;
@@ -734,74 +1041,129 @@ void R_Mesh_AddTransparent(void)
 
 void R_Mesh_Draw(const rmeshinfo_t *m)
 {
-	static int i, j, *index, overbright;
-	static float c, *in, scaler, cr, cg, cb, ca;
+	// these are static because gcc runs out of virtual registers otherwise
+	static int i, j, overbright, *index;
+	static float *in, scaler;
+	static float cr, cg, cb, ca;
 	static buf_mesh_t *mesh;
 	static buf_vertex_t *vert;
 	static buf_fcolor_t *fcolor;
-	static buf_bcolor_t *bcolor;
 	static buf_texcoord_t *texcoord[MAX_TEXTUREUNITS];
-	static buf_transtri_t *tri;
-	static byte br, bg, bb, ba;
+
+	if (!backendactive)
+		Sys_Error("R_Mesh_Draw: called when backend is not active\n");
 
 	if (m->index == NULL
 	 || !m->numtriangles
 	 || m->vertex == NULL
 	 || !m->numverts)
-	 	return;
+		Host_Error("R_Mesh_Draw: no triangles or verts\n");
+
+	// ignore meaningless alpha meshs
+	if (!m->depthwrite && m->blendfunc1 == GL_SRC_ALPHA && (m->blendfunc2 == GL_ONE || m->blendfunc2 == GL_ONE_MINUS_SRC_ALPHA))
+	{
+		if (m->color)
+		{
+			for (i = 0, in = m->color + 3;i < m->numverts;i++, (int)in += m->colorstep)
+				if (*in >= 0.01f)
+					break;
+			if (i == m->numverts)
+				return;
+		}
+		else if (m->ca < 0.01f)
+			return;
+	}
 
 	if (!backendactive)
-		Sys_Error("R_DrawMesh: called when backend is not active\n");
+		Sys_Error("R_Mesh_Draw: called when backend is not active\n");
+
+#ifdef DEBUGGL
+	for (i = 0;i < m->numtriangles * 3;i++)
+		if ((unsigned int) m->index[i] >= (unsigned int) m->numverts)
+			Host_Error("R_Mesh_Draw: invalid index (%i of %i verts)\n", m->index, m->numverts);
+#endif
+
+	// LordHavoc: removed this error condition because with floatcolors 0,
+	// the 3DFX driver works with very large meshs
+	// FIXME: we can work around this by falling back on non-array renderer if buffers are too big
+	//if (m->numtriangles > 1024 || m->numverts > 3072)
+	//{
+	//	Con_Printf("R_Mesh_Draw: mesh too big for 3DFX drivers, rejected\n");
+	//	return;
+	//}
+
+	i = max(m->numtriangles * 3, m->numverts);
+	if (overflowedverts < i)
+		overflowedverts = i;
+
+	if (m->numtriangles > max_meshs || m->numverts > max_verts)
+	{
+		Con_Printf("R_Mesh_Draw: mesh too big for current gl_mesh_maxtriangles setting, increasing limits\n");
+		return;
+	}
 
 	if (m->transparent)
 	{
-		if (currenttransmesh >= max_meshs || (currenttranstriangle + m->numtriangles) > max_meshs || (currenttransvertex + m->numverts) > max_verts)
+		overflowedtransverts += max(m->numtriangles * 3, m->numverts);
+		if (currenttransmesh >= max_transmeshs || (currenttranstriangle + m->numtriangles) > max_transmeshs || (currenttransvertex + m->numverts) > max_transverts)
 		{
 			if (!transranout)
 			{
-				Con_Printf("R_DrawMesh: ran out of room for transparent meshs\n");
+				Con_Printf("R_Mesh_Draw: ran out of room for transparent meshs\n");
 				transranout = true;
 			}
 			return;
 		}
 
+		c_transmeshs++;
+		c_transtris += m->numtriangles;
 		vert = &buf_transvertex[currenttransvertex];
 		fcolor = &buf_transfcolor[currenttransvertex];
-		bcolor = &buf_transbcolor[currenttransvertex];
 		for (i = 0;i < backendunits;i++)
 			texcoord[i] = &buf_transtexcoord[i][currenttransvertex];
+
+		// transmesh is only for storage of transparent meshs until they
+		// are inserted into the main mesh array
+		mesh = &buf_transmesh[currenttransmesh++];
+		mesh->firsttriangle = currenttranstriangle;
+		mesh->firstvert = currenttransvertex;
+		index = &buf_transtri[currenttranstriangle].index[0];
+
+		currenttranstriangle += m->numtriangles;
+		currenttransvertex += m->numverts;
 	}
 	else
 	{
-		if (m->numtriangles > max_meshs || m->numverts > max_verts)
-		{
-			Con_Printf("R_DrawMesh: mesh too big for buffers\n");
-			return;
-		}
-
 		if (currentmesh >= max_meshs || (currenttriangle + m->numtriangles) > max_batch || (currentvertex + m->numverts) > max_verts)
 			R_Mesh_Render();
 
+		c_meshs++;
+		c_meshtris += m->numtriangles;
 		vert = &buf_vertex[currentvertex];
 		fcolor = &buf_fcolor[currentvertex];
-		bcolor = &buf_bcolor[currentvertex];
 		for (i = 0;i < backendunits;i++)
 			texcoord[i] = &buf_texcoord[i][currentvertex];
-	}
 
-	// vertex array code is shared for transparent and opaque meshs
+		// opaque meshs are rendered directly
+		mesh = &buf_mesh[currentmesh++];
+		mesh->firsttriangle = currenttriangle;
+		mesh->firstvert = currentvertex;
+		index = &buf_tri[currenttriangle].index[0];
 
-	for (i = 0, in = m->vertex;i < m->numverts;i++, (int)in += m->vertexstep)
-	{
-		vert[i].v[0] = in[0];
-		vert[i].v[1] = in[1];
-		vert[i].v[2] = in[2];
-		// push out farclip based on vertices encountered
-		c = DotProduct(vert[i].v, vpn);
-		if (meshfarclip < c)
-			meshfarclip = c;
+		currenttriangle += m->numtriangles;
+		currentvertex += m->numverts;
 	}
 
+	// code shared for transparent and opaque meshs
+	memcpy(index, m->index, sizeof(int[3]) * m->numtriangles);
+	mesh->blendfunc1 = m->blendfunc1;
+	mesh->blendfunc2 = m->blendfunc2;
+	mesh->depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite);
+	mesh->depthtest = !m->depthdisable;
+	mesh->triangles = m->numtriangles;
+	mesh->verts = m->numverts;
+
+	overbright = false;
 	scaler = 1;
 	if (m->blendfunc2 == GL_SRC_COLOR)
 	{
@@ -816,148 +1178,385 @@ void R_Mesh_Draw(const rmeshinfo_t *m)
 			if (overbright)
 				scaler *= 0.25f;
 		}
-		if (lighthalf)
-			scaler *= 0.5f;
+		scaler *= overbrightscale;
+	}
+
+
+	j = -1;
+	for (i = 0;i < backendunits;i++)
+	{
+		if ((mesh->textures[i] = m->tex[i]))
+			j = i;
+		mesh->texturergbscale[i] = m->texrgbscale[i];
+		if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
+			mesh->texturergbscale[i] = 1;
 	}
+	if (overbright && j >= 0)
+		mesh->texturergbscale[j] = 4;
 
-	if (floatcolors)
+	if (m->vertexstep != sizeof(buf_vertex_t))
 	{
-		if (m->color)
+		for (i = 0, in = m->vertex;i < m->numverts;i++, (int)in += m->vertexstep)
 		{
-			for (i = 0, in = m->color;i < m->numverts;i++, (int)in += m->colorstep)
-			{
-				fcolor[i].c[0] = in[0] * scaler;
-				fcolor[i].c[1] = in[1] * scaler;
-				fcolor[i].c[2] = in[2] * scaler;
-				fcolor[i].c[3] = in[3];
-			}
+			vert[i].v[0] = in[0];
+			vert[i].v[1] = in[1];
+			vert[i].v[2] = in[2];
 		}
-		else
+	}
+	else
+		memcpy(vert, m->vertex, m->numverts * sizeof(buf_vertex_t));
+
+	if (m->color)
+	{
+		for (i = 0, in = m->color;i < m->numverts;i++, (int)in += m->colorstep)
 		{
-			cr = m->cr * scaler;
-			cg = m->cg * scaler;
-			cb = m->cb * scaler;
-			ca = m->ca;
-			for (i = 0;i < m->numverts;i++)
-			{
-				fcolor[i].c[0] = cr;
-				fcolor[i].c[1] = cg;
-				fcolor[i].c[2] = cb;
-				fcolor[i].c[3] = ca;
-			}
+			fcolor[i].c[0] = in[0] * scaler;
+			fcolor[i].c[1] = in[1] * scaler;
+			fcolor[i].c[2] = in[2] * scaler;
+			fcolor[i].c[3] = in[3];
 		}
 	}
 	else
 	{
-		if (m->color)
+		cr = m->cr * scaler;
+		cg = m->cg * scaler;
+		cb = m->cb * scaler;
+		ca = m->ca;
+		for (i = 0;i < m->numverts;i++)
 		{
-			for (i = 0, in = m->color;i < m->numverts;i++, (int)in += m->colorstep)
+			fcolor[i].c[0] = cr;
+			fcolor[i].c[1] = cg;
+			fcolor[i].c[2] = cb;
+			fcolor[i].c[3] = ca;
+		}
+	}
+
+	for (j = 0;j < MAX_TEXTUREUNITS && m->tex[j];j++)
+	{
+		if (j >= backendunits)
+			Sys_Error("R_Mesh_Draw: texture %i supplied when there are only %i texture units\n", j + 1, backendunits);
+		if (m->texcoordstep[j] != sizeof(buf_texcoord_t))
+		{
+			for (i = 0, in = m->texcoords[j];i < m->numverts;i++, (int)in += m->texcoordstep[j])
 			{
-				// shift float to have 8bit fraction at base of number,
-				// then read as integer and kill float bits...
-				c = in[0] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bcolor[i].c[0] = (byte) j;
-				c = in[1] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bcolor[i].c[1] = (byte) j;
-				c = in[2] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bcolor[i].c[2] = (byte) j;
-				c = in[3]          + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bcolor[i].c[3] = (byte) j;
+				texcoord[j][i].t[0] = in[0];
+				texcoord[j][i].t[1] = in[1];
 			}
 		}
 		else
+			memcpy(&texcoord[j][0].t[0], m->texcoords[j], m->numverts * sizeof(buf_texcoord_t));
+	}
+
+	if (currenttriangle >= max_batch)
+		R_Mesh_Render();
+}
+
+void R_Mesh_Draw_NativeOnly(const rmeshinfo_t *m)
+{
+	// these are static because gcc runs out of virtual registers otherwise
+	static int i, j, overbright, *index;
+	static float *in, scaler;
+	static buf_mesh_t *mesh;
+	static buf_vertex_t *vert;
+	static buf_fcolor_t *fcolor;
+	static buf_texcoord_t *texcoord[MAX_TEXTUREUNITS];
+
+	if (!backendactive)
+		Sys_Error("R_Mesh_Draw: called when backend is not active\n");
+
+	if (m->index == NULL
+	 || !m->numtriangles
+	 || m->vertex == NULL
+	 || !m->numverts)
+		Host_Error("R_Mesh_Draw: no triangles or verts\n");
+
+	// ignore meaningless alpha meshs
+	if (!m->depthwrite && m->blendfunc1 == GL_SRC_ALPHA && (m->blendfunc2 == GL_ONE || m->blendfunc2 == GL_ONE_MINUS_SRC_ALPHA))
+	{
+		if (m->color)
+		{
+			for (i = 0, in = m->color + 3;i < m->numverts;i++, (int)in += m->colorstep)
+				if (*in >= 0.01f)
+					break;
+			if (i == m->numverts)
+				return;
+		}
+		else if (m->ca < 0.01f)
+			return;
+	}
+
+	// LordHavoc: removed this error condition because with floatcolors 0,
+	// the 3DFX driver works with very large meshs
+	// FIXME: we can work around this by falling back on non-array renderer if buffers are too big
+	//if (m->numtriangles > 1024 || m->numverts > 3072)
+	//{
+	//	Con_Printf("R_Mesh_Draw_NativeOnly: mesh too big for 3DFX drivers, rejected\n");
+	//	return;
+	//}
+
+	i = max(m->numtriangles * 3, m->numverts);
+	if (overflowedverts < i)
+		overflowedverts = i;
+
+	if (m->numtriangles > max_meshs || m->numverts > max_verts)
+	{
+		Con_Printf("R_Mesh_Draw_NativeOnly: mesh too big for current gl_mesh_maxtriangles setting, increasing limits\n");
+		return;
+	}
+
+	if (m->transparent)
+	{
+		overflowedtransverts += max(m->numtriangles * 3, m->numverts);
+		if (currenttransmesh >= max_transmeshs || (currenttranstriangle + m->numtriangles) > max_transmeshs || (currenttransvertex + m->numverts) > max_transverts)
 		{
-			c = in[0] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;br = (byte) j;
-			c = in[1] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bg = (byte) j;
-			c = in[2] * scaler + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;bb = (byte) j;
-			c = in[3]          + 32768.0f;j = (*((long *)&c) & 0x7FFFFF);if (j > 255) j = 255;ba = (byte) j;
-			for (i = 0;i < m->numverts;i++)
+			if (!transranout)
 			{
-				bcolor[i].c[0] = br;
-				bcolor[i].c[1] = bg;
-				bcolor[i].c[2] = bb;
-				bcolor[i].c[3] = ba;
+				Con_Printf("R_Mesh_Draw_NativeOnly: ran out of room for transparent meshs\n");
+				transranout = true;
 			}
+			return;
 		}
+
+		c_transmeshs++;
+		c_transtris += m->numtriangles;
+		vert = &buf_transvertex[currenttransvertex];
+		fcolor = &buf_transfcolor[currenttransvertex];
+		for (i = 0;i < backendunits;i++)
+			texcoord[i] = &buf_transtexcoord[i][currenttransvertex];
+
+		// transmesh is only for storage of transparent meshs until they
+		// are inserted into the main mesh array
+		mesh = &buf_transmesh[currenttransmesh++];
+		mesh->firsttriangle = currenttranstriangle;
+		mesh->firstvert = currenttransvertex;
+		index = &buf_transtri[currenttranstriangle].index[0];
+		currenttranstriangle += m->numtriangles;
+		currenttransvertex += m->numverts;
 	}
+	else
+	{
+		if (currentmesh >= max_meshs || (currenttriangle + m->numtriangles) > max_batch || (currentvertex + m->numverts) > max_verts)
+			R_Mesh_Render();
 
-	for (j = 0;j < MAX_TEXTUREUNITS && m->tex[j];j++)
+		c_meshs++;
+		c_meshtris += m->numtriangles;
+		vert = &buf_vertex[currentvertex];
+		fcolor = &buf_fcolor[currentvertex];
+		for (i = 0;i < backendunits;i++)
+			texcoord[i] = &buf_texcoord[i][currentvertex];
+
+		// opaque meshs are rendered directly
+		mesh = &buf_mesh[currentmesh++];
+		mesh->firsttriangle = currenttriangle;
+		mesh->firstvert = currentvertex;
+		index = &buf_tri[currenttriangle].index[0];
+		currenttriangle += m->numtriangles;
+		currentvertex += m->numverts;
+	}
+
+	// code shared for transparent and opaque meshs
+	memcpy(index, m->index, sizeof(int[3]) * m->numtriangles);
+	mesh->blendfunc1 = m->blendfunc1;
+	mesh->blendfunc2 = m->blendfunc2;
+	mesh->depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite);
+	mesh->depthtest = !m->depthdisable;
+	mesh->triangles = m->numtriangles;
+	mesh->verts = m->numverts;
+
+	overbright = false;
+	scaler = 1;
+	if (m->blendfunc2 == GL_SRC_COLOR)
 	{
-		if (j >= backendunits)
-			Sys_Error("R_DrawMesh: texture %i supplied when there are only %i texture units\n", j + 1, backendunits);
-		for (i = 0, in = m->texcoords[j];i < m->numverts;i++, (int)in += m->texcoordstep[j])
+		if (m->blendfunc1 == GL_DST_COLOR) // 2x modulate with framebuffer
+			scaler *= 0.5f;
+	}
+	else
+	{
+		if (m->tex[0])
 		{
-			texcoord[j][i].t[0] = in[0];
-			texcoord[j][i].t[1] = in[1];
+			overbright = gl_combine.integer;
+			if (overbright)
+				scaler *= 0.25f;
 		}
+		scaler *= overbrightscale;
 	}
-	for (;j < backendunits;j++)
+
+	j = -1;
+	for (i = 0;i < backendunits;i++)
+	{
+		if ((mesh->textures[i] = m->tex[i]))
+			j = i;
+		mesh->texturergbscale[i] = m->texrgbscale[i];
+		if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
+			mesh->texturergbscale[i] = 1;
+	}
+	if (overbright && j >= 0)
+		mesh->texturergbscale[j] = 4;
+
+	if (m->vertexstep != sizeof(buf_vertex_t))
+		Host_Error("R_Mesh_Draw_NativeOnly: unsupported vertexstep\n");
+	if (m->colorstep != sizeof(buf_fcolor_t))
+		Host_Error("R_Mesh_Draw_NativeOnly: unsupported colorstep\n");
+	if (m->color == NULL)
+		Host_Error("R_Mesh_Draw_NativeOnly: must provide color array\n");
+	for (j = 0;j < MAX_TEXTUREUNITS && m->tex[j];j++)
+	{
+		if (j >= backendunits)
+			Sys_Error("R_Mesh_Draw_NativeOnly: texture %i supplied when there are only %i texture units\n", j + 1, backendunits);
+		if (m->texcoordstep[j] != sizeof(buf_texcoord_t))
+			Host_Error("R_Mesh_Draw_NativeOnly: unsupported texcoordstep\n");
+	}
+
+	memcpy(vert, m->vertex, m->numverts * sizeof(buf_vertex_t));
+	for (j = 0;j < MAX_TEXTUREUNITS && m->tex[j];j++)
+		memcpy(&texcoord[j][0].t[0], m->texcoords[j], m->numverts * sizeof(buf_texcoord_t));
+
+	memcpy(fcolor, m->color, m->numverts * sizeof(buf_fcolor_t));
+
+	// do this as a second step because memcpy preloaded the cache, which we can't easily do
+	if (scaler != 1)
 	{
 		for (i = 0;i < m->numverts;i++)
 		{
-			texcoord[j][i].t[0] = 0;
-			texcoord[j][i].t[1] = 0;
+			fcolor[i].c[0] *= scaler;
+			fcolor[i].c[1] *= scaler;
+			fcolor[i].c[2] *= scaler;
 		}
 	}
 
+	if (currenttriangle >= max_batch)
+		R_Mesh_Render();
+}
+
+// allocates space in geometry buffers, and fills in pointers to the buffers in passsed struct
+// (this is used for very high speed rendering, no copying)
+int R_Mesh_Draw_GetBuffer(rmeshbufferinfo_t *m)
+{
+	// these are static because gcc runs out of virtual registers otherwise
+	int i, j, overbright;
+	float scaler;
+	buf_mesh_t *mesh;
+
+	if (!backendactive)
+		Sys_Error("R_Mesh_Draw: called when backend is not active\n");
+
+	if (!m->numtriangles
+	 || !m->numverts)
+		Host_Error("R_Mesh_Draw: no triangles or verts\n");
+
+	// LordHavoc: removed this error condition because with floatcolors 0,
+	// the 3DFX driver works with very large meshs
+	// FIXME: we can work around this by falling back on non-array renderer if buffers are too big
+	//if (m->numtriangles > 1024 || m->numverts > 3072)
+	//{
+	//	Con_Printf("R_Mesh_Draw_GetBuffer: mesh too big for 3DFX drivers, rejected\n");
+	//	return false;
+	//}
+
+	i = max(m->numtriangles * 3, m->numverts);
+	if (overflowedverts < i)
+		overflowedverts = i;
+
+	if (m->numtriangles > max_meshs || m->numverts > max_verts)
+	{
+		Con_Printf("R_Mesh_Draw_GetBuffer: mesh too big for current gl_mesh_maxtriangles setting, increasing limits\n");
+		return false;
+	}
+
 	if (m->transparent)
 	{
-		// transmesh is only for storage of tranparent meshs until they
-		// are inserted into the main mesh array
-		mesh = &buf_transmesh[currenttransmesh++];
-		mesh->blendfunc1 = m->blendfunc1;
-		mesh->blendfunc2 = m->blendfunc2;
-		mesh->depthmask = false;
-		j = -1;
-		for (i = 0;i < backendunits;i++)
+		overflowedtransverts += max(m->numtriangles * 3, m->numverts);
+		if (currenttransmesh >= max_transmeshs || (currenttranstriangle + m->numtriangles) > max_transmeshs || (currenttransvertex + m->numverts) > max_transverts)
 		{
-			if ((mesh->textures[i] = m->tex[i]))
-				j = i;
-			mesh->texturergbscale[i] = m->texrgbscale[i];
-			if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
-				mesh->texturergbscale[i] = 1;
+			if (!transranout)
+			{
+				Con_Printf("R_Mesh_Draw: ran out of room for transparent meshs\n");
+				transranout = true;
+			}
+			return false;
 		}
-		if (overbright && j >= 0)
-			mesh->texturergbscale[j] = 4;
 
-		// transparent meshs are broken up into individual triangles which can
-		// be sorted by depth
-		index = m->index;
-		for (i = 0;i < m->numtriangles;i++)
-		{
-			tri = &buf_transtri[currenttranstriangle++];
-			tri->mesh = mesh;
-			tri->index[0] = *index++ + currenttransvertex;
-			tri->index[1] = *index++ + currenttransvertex;
-			tri->index[2] = *index++ + currenttransvertex;
-		}
+		c_transmeshs++;
+		c_transtris += m->numtriangles;
+		m->index = &buf_transtri[currenttranstriangle].index[0];
+		m->vertex = &buf_transvertex[currenttransvertex].v[0];
+		m->color = &buf_transfcolor[currenttransvertex].c[0];
+		for (i = 0;i < backendunits;i++)
+			m->texcoords[i] = &buf_transtexcoord[i][currenttransvertex].t[0];
+
+		// transmesh is only for storage of transparent meshs until they
+		// are inserted into the main mesh array
+		mesh = &buf_transmesh[currenttransmesh++];
+		mesh->firsttriangle = currenttranstriangle;
+		mesh->firstvert = currenttransvertex;
+		currenttranstriangle += m->numtriangles;
 		currenttransvertex += m->numverts;
 	}
 	else
 	{
-		mesh = &buf_mesh[currentmesh++];
-		mesh->blendfunc1 = m->blendfunc1;
-		mesh->blendfunc2 = m->blendfunc2;
-		mesh->depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite);
-		mesh->firsttriangle = currenttriangle;
-		mesh->triangles = m->numtriangles;
-		j = -1;
+		if (currentmesh >= max_meshs || (currenttriangle + m->numtriangles) > max_batch || (currentvertex + m->numverts) > max_verts)
+			R_Mesh_Render();
+
+		c_meshs++;
+		c_meshtris += m->numtriangles;
+		m->index = &buf_tri[currenttriangle].index[0];
+		m->vertex = &buf_vertex[currentvertex].v[0];
+		m->color = &buf_fcolor[currentvertex].c[0];
 		for (i = 0;i < backendunits;i++)
-		{
-			if ((mesh->textures[i] = m->tex[i]))
-				j = i;
-			mesh->texturergbscale[i] = m->texrgbscale[i];
-			if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
-				mesh->texturergbscale[i] = 1;
-		}
-		if (overbright && j >= 0)
-			mesh->texturergbscale[j] = 4;
+			m->texcoords[i] = &buf_texcoord[i][currentvertex].t[0];
 
 		// opaque meshs are rendered directly
-		index = (int *)&buf_tri[currenttriangle];
-		for (i = 0;i < m->numtriangles * 3;i++)
-			index[i] = m->index[i] + currentvertex;
+		mesh = &buf_mesh[currentmesh++];
+		mesh->firsttriangle = currenttriangle;
+		mesh->firstvert = currentvertex;
 		currenttriangle += m->numtriangles;
 		currentvertex += m->numverts;
 	}
 
-	c_meshtris += m->numtriangles;
+	// code shared for transparent and opaque meshs
+	mesh->blendfunc1 = m->blendfunc1;
+	mesh->blendfunc2 = m->blendfunc2;
+	mesh->depthmask = (m->blendfunc2 == GL_ZERO || m->depthwrite);
+	mesh->depthtest = !m->depthdisable;
+	mesh->triangles = m->numtriangles;
+	mesh->verts = m->numverts;
+
+	overbright = false;
+	scaler = 1;
+	if (m->blendfunc2 == GL_SRC_COLOR)
+	{
+		if (m->blendfunc1 == GL_DST_COLOR) // 2x modulate with framebuffer
+			scaler *= 0.5f;
+	}
+	else
+	{
+		if (m->tex[0])
+		{
+			overbright = gl_combine.integer;
+			if (overbright)
+				scaler *= 0.25f;
+		}
+		scaler *= overbrightscale;
+	}
+	m->colorscale = scaler;
+
+	j = -1;
+	for (i = 0;i < MAX_TEXTUREUNITS;i++)
+	{
+		if ((mesh->textures[i] = m->tex[i]))
+		{
+			j = i;
+			if (i >= backendunits)
+				Sys_Error("R_Mesh_Draw_GetBuffer: texture %i supplied when there are only %i texture units\n", j + 1, backendunits);
+		}
+		mesh->texturergbscale[i] = m->texrgbscale[i];
+		if (mesh->texturergbscale[i] != 1 && mesh->texturergbscale[i] != 2 && mesh->texturergbscale[i] != 4)
+			mesh->texturergbscale[i] = 1;
+	}
+	if (overbright && j >= 0)
+		mesh->texturergbscale[j] = 4;
+
+	return true;
 }
 
 void R_Mesh_DrawPolygon(rmeshinfo_t *m, int numverts)
@@ -977,3 +1576,99 @@ void R_Mesh_DrawPolygon(rmeshinfo_t *m, int numverts)
 	}
 	R_Mesh_Draw(m);
 }
+
+/*
+==============================================================================
+
+						SCREEN SHOTS
+
+==============================================================================
+*/
+
+qboolean SCR_ScreenShot(char *filename, int x, int y, int width, int height)
+{
+	qboolean ret;
+	int i;
+	qbyte *buffer;
+
+	if (!r_render.integer)
+		return false;
+
+	buffer = Mem_Alloc(tempmempool, width*height*3);
+	qglReadPixels (x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer);
+	CHECKGLERROR
+
+	// LordHavoc: compensate for v_overbrightbits when using hardware gamma
+	if (v_hwgamma.integer)
+		for (i = 0;i < width * height * 3;i++)
+			buffer[i] <<= v_overbrightbits.integer;
+
+	ret = Image_WriteTGARGB_preflipped(filename, width, height, buffer);
+
+	Mem_Free(buffer);
+	return ret;
+}
+
+//=============================================================================
+
+void R_ClearScreen(void)
+{
+	if (r_render.integer)
+	{
+		// clear to black
+		qglClearColor(0,0,0,0);CHECKGLERROR
+		// clear the screen
+		qglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);CHECKGLERROR
+		// set dithering mode
+		if (gl_dither.integer)
+		{
+			qglEnable(GL_DITHER);CHECKGLERROR
+		}
+		else
+		{
+			qglDisable(GL_DITHER);CHECKGLERROR
+		}
+	}
+}
+
+/*
+==================
+SCR_UpdateScreen
+
+This is called every frame, and can also be called explicitly to flush
+text to the screen.
+==================
+*/
+void SCR_UpdateScreen (void)
+{
+	VID_Finish ();
+
+	R_TimeReport("finish");
+
+	if (gl_combine.integer && !gl_combine_extension)
+		Cvar_SetValue("gl_combine", 0);
+
+	lightscalebit = v_overbrightbits.integer;
+	if (gl_combine.integer && r_multitexture.integer)
+		lightscalebit += 2;
+
+	lightscale = 1.0f / (float) (1 << lightscalebit);
+	overbrightscale = 1.0f / (float) (1 << v_overbrightbits.integer);
+
+	R_TimeReport("setup");
+
+	R_ClearScreen();
+
+	R_TimeReport("clear");
+
+	if (scr_conlines < vid.conheight)
+		R_RenderView();
+
+	// draw 2D stuff
+	R_DrawQueue();
+
+	// tell driver to commit it's partially full geometry queue to the rendering queue
+	// (this doesn't wait for the commands themselves to complete)
+	qglFlush();
+}
+