]> de.git.xonotic.org Git - xonotic/darkplaces.git/blobdiff - gl_rsurf.c
reduced default -zone from 512k to 128k (quake used 48k)
[xonotic/darkplaces.git] / gl_rsurf.c
index fe5bb6ca9f6127fa2a02f3fabbf080803c911b05..21d9d646bc5976db6ae0b4bd23115bfff41e6136 100644 (file)
@@ -21,8 +21,6 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 #include "quakedef.h"
 
-extern int                     skytexturenum;
-
 int            lightmap_textures;
 
 signed blocklights[18*18*3]; // LordHavoc: *3 for colored lighting
@@ -51,15 +49,22 @@ cvar_t gl_vertex = {"gl_vertex", "0"};
 cvar_t gl_texsort = {"gl_texsort", "1"};
 //cvar_t gl_funnywalls = {"gl_funnywalls", "0"}; // LordHavoc: see BuildSurfaceDisplayList
 
-qboolean lightmaprgba, nosubimagefragments, nosubimage;
+qboolean lightmaprgba, nosubimagefragments, nosubimage, skyisvisible;
 int lightmapbytes;
 
-qboolean skyisvisible;
 extern qboolean gl_arrays;
 
 extern int r_dlightframecount;
 
-void glrsurf_init()
+void gl_surf_start()
+{
+}
+
+void gl_surf_shutdown()
+{
+}
+
+void GL_Surf_Init()
 {
        int i;
        for (i = 0;i < MAX_LIGHTMAPS;i++)
@@ -80,9 +85,10 @@ void glrsurf_init()
 //             Cvar_SetValue("gl_nosubimage", 1);
                Cvar_SetValue("gl_lightmode", 0);
        }
+
+       R_RegisterModule("GL_Surf", gl_surf_start, gl_surf_shutdown);
 }
 
-extern qboolean lighthalf;
 /*
 ===============
 R_BuildLightMap
@@ -214,7 +220,8 @@ void R_UpdateLightmap(msurface_t *s, int lnum)
 {
        int smax, tmax;
        // upload the new lightmap texture fragment
-       glBindTexture(GL_TEXTURE_2D, lightmap_textures + lnum);
+       if(r_upload.value)
+               glBindTexture(GL_TEXTURE_2D, lightmap_textures + lnum);
        if (nosubimage || nosubimagefragments)
        {
                if (lightmapupdate[lnum][0] > s->light_t)
@@ -233,12 +240,14 @@ void R_UpdateLightmap(msurface_t *s, int lnum)
                if (lightmaprgba)
                {
                        R_BuildLightMap (s, templight, smax * 4);
-                       glTexSubImage2D(GL_TEXTURE_2D, 0, s->light_s, s->light_t, smax, tmax, GL_RGBA, GL_UNSIGNED_BYTE, templight);
+                       if(r_upload.value)
+                               glTexSubImage2D(GL_TEXTURE_2D, 0, s->light_s, s->light_t, smax, tmax, GL_RGBA, GL_UNSIGNED_BYTE, templight);
                }
                else
                {
                        R_BuildLightMap (s, templight, smax * 3);
-                       glTexSubImage2D(GL_TEXTURE_2D, 0, s->light_s, s->light_t, smax, tmax, GL_RGB , GL_UNSIGNED_BYTE, templight);
+                       if(r_upload.value)
+                               glTexSubImage2D(GL_TEXTURE_2D, 0, s->light_s, s->light_t, smax, tmax, GL_RGB , GL_UNSIGNED_BYTE, templight);
                }
        }
 }
@@ -303,12 +312,9 @@ extern     int             solidskytexture;
 extern int             alphaskytexture;
 extern float   speedscale;             // for top sky and bottom sky
 
-qboolean mtexenabled = false;
-
 extern char skyname[];
 
 void R_DynamicLightPoint(vec3_t color, vec3_t org, int *dlightbits);
-//extern cvar_t r_dynamicwater;
 float  turbsin[256] =
 {
        #include "gl_warp_sin.h"
@@ -325,20 +331,23 @@ void UploadLightmaps()
                {
                        if (lightmapupdate[i][0] < lightmapupdate[i][1])
                        {
-                               glBindTexture(GL_TEXTURE_2D, lightmap_textures + i);
-                               if (nosubimage)
-                               {
-                                       if (lightmaprgba)
-                                               glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i]);
-                                       else
-                                               glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i]);
-                               }
-                               else
+                               if(r_upload.value)
                                {
-                                       if (lightmaprgba)
-                                               glTexSubImage2D(GL_TEXTURE_2D, 0, 0, lightmapupdate[i][0], BLOCK_WIDTH, lightmapupdate[i][1] - lightmapupdate[i][0], GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i] + (BLOCK_WIDTH * 4 * lightmapupdate[i][0]));
+                                       glBindTexture(GL_TEXTURE_2D, lightmap_textures + i);
+                                       if (nosubimage)
+                                       {
+                                               if (lightmaprgba)
+                                                       glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i]);
+                                               else
+                                                       glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i]);
+                                       }
                                        else
-                                               glTexSubImage2D(GL_TEXTURE_2D, 0, 0, lightmapupdate[i][0], BLOCK_WIDTH, lightmapupdate[i][1] - lightmapupdate[i][0], GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i] + (BLOCK_WIDTH * 3 * lightmapupdate[i][0]));
+                                       {
+                                               if (lightmaprgba)
+                                                       glTexSubImage2D(GL_TEXTURE_2D, 0, 0, lightmapupdate[i][0], BLOCK_WIDTH, lightmapupdate[i][1] - lightmapupdate[i][0], GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i] + (BLOCK_WIDTH * 4 * lightmapupdate[i][0]));
+                                               else
+                                                       glTexSubImage2D(GL_TEXTURE_2D, 0, 0, lightmapupdate[i][0], BLOCK_WIDTH, lightmapupdate[i][1] - lightmapupdate[i][0], GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i] + (BLOCK_WIDTH * 3 * lightmapupdate[i][0]));
+                                       }
                                }
                        }
                        lightmapupdate[i][0] = BLOCK_HEIGHT;
@@ -347,7 +356,9 @@ void UploadLightmaps()
        }
 }
 
-void R_SkySurf(msurface_t *s, qboolean transform)
+float  wvert[1024*6]; // used by the following functions
+
+void RSurf_DrawSky(msurface_t *s, int transform)
 {
        glpoly_t *p;
        int i;
@@ -379,11 +390,11 @@ void R_SkySurf(msurface_t *s, qboolean transform)
        }
 }
 
-void R_LightSurface(int *dlightbits, glpoly_t *polys, float *wvert)
+int RSurf_Light(int *dlightbits, glpoly_t *polys)
 {
        float           cr, cg, cb, radius, radius2, f, *v, *wv;
-       int                     i, a, b;
-       unsigned int c;
+       int                     i, a, b, lit = false;
+       unsigned int c, d;
        dlight_t        *light;
        vec_t           *lightorigin;
        glpoly_t        *p;
@@ -391,18 +402,18 @@ void R_LightSurface(int *dlightbits, glpoly_t *polys, float *wvert)
        {
                if ((c = dlightbits[a]))
                {
-                       for (b = 0;c && b < 32;b++)
+                       for (b = 0, d = 1;c;b++, d <<= 1)
                        {
-                               if (c & (1 << b))
+                               if (c & d)
                                {
-                                       c -= (1 << b);
+                                       c -= d;
                                        light = &cl_dlights[a * 32 + b];
                                        lightorigin = light->origin;
                                        cr = light->color[0];
                                        cg = light->color[1];
                                        cb = light->color[2];
-                                       radius = light->radius*light->radius*16.0f;
-                                       radius2 = radius * 16.0f;
+                                       radius = light->radius*light->radius*LIGHTSCALE;
+                                       radius2 = radius * (256.0f / LIGHTSCALE);
                                        wv = wvert;
                                        for (p = polys;p;p = p->next)
                                        {
@@ -411,28 +422,28 @@ void R_LightSurface(int *dlightbits, glpoly_t *polys, float *wvert)
                                                        f = VectorDistance2(wv, lightorigin);
                                                        if (f < radius)
                                                        {
-                                                               f = radius2 / (f + 65536.0f);
+                                                               f = radius2 / (f + LIGHTOFFSET);
                                                                wv[3] += cr * f;
                                                                wv[4] += cg * f;
                                                                wv[5] += cb * f;
+                                                               lit = true;
                                                        }
                                                        wv += 6;
                                                }
                                        }
                                }
-                               c >>= 1;
-                               b++;
                        }
                }
        }
+       return lit;
 }
 
-void R_WaterSurf(msurface_t *s, texture_t *t, qboolean transform, int alpha)
+void RSurf_DrawWater(msurface_t *s, texture_t *t, int transform, int alpha)
 {
        int             i;
        float   os = turbsin[(int)(realtime * TURBSCALE) & 255], ot = turbsin[(int)(realtime * TURBSCALE + 96.0) & 255];
        glpoly_t *p;
-       float   wvert[1024*6], *wv, *v;
+       float   *wv, *v;
        wv = wvert;
        for (p = s->polys;p;p = p->next)
        {
@@ -449,7 +460,7 @@ void R_WaterSurf(msurface_t *s, texture_t *t, qboolean transform, int alpha)
                }
        }
        if (s->dlightframe == r_dlightframecount && r_dynamic.value)
-               R_LightSurface(s->dlightbits, s->polys, wvert);
+               RSurf_Light(s->dlightbits, s->polys);
        wv = wvert;
        // FIXME: make fog texture if water texture is transparent?
        for (p=s->polys ; p ; p=p->next)
@@ -461,11 +472,13 @@ void R_WaterSurf(msurface_t *s, texture_t *t, qboolean transform, int alpha)
        }
 }
 
-void R_WallSurf(msurface_t *s, texture_t *t, qboolean transform)
+void RSurf_DrawWall(msurface_t *s, texture_t *t, int transform)
 {
-       int                     i;
-       glpoly_t        *p;
-       float           wvert[64*6], *wv, *v;
+       int             i, lit = false, polys = 0, verts = 0;
+       float   *v, *wv;
+       glpoly_t *p;
+       wallpoly_t *wp;
+       wallvert_t *out;
        // check for lightmap modification
        if (r_dynamic.value)
        {
@@ -488,45 +501,54 @@ void R_WallSurf(msurface_t *s, texture_t *t, qboolean transform)
                        wv[3] = wv[4] = wv[5] = 0.0f;
                        wv += 6;
                }
+               verts += p->numverts;
+               polys++;
        }
+       if ((currentwallpoly + polys > MAX_WALLPOLYS) || (currentwallvert+verts > MAX_WALLVERTS))
+               return;
        if (s->dlightframe == r_dlightframecount && r_dynamic.value)
-               R_LightSurface(s->dlightbits, s->polys, wvert);
+               lit = RSurf_Light(s->dlightbits, s->polys);
        wv = wvert;
+       wp = &wallpoly[currentwallpoly];
+       out = &wallvert[currentwallvert];
+       currentwallpoly += polys;
        for (p = s->polys;p;p = p->next)
        {
-               if (currentwallpoly >= MAX_WALLPOLYS)
-                       break;
                v = p->verts[0];
-               wallpoly[currentwallpoly].texnum = (unsigned short) t->gl_texturenum;
-               wallpoly[currentwallpoly].lighttexnum = (unsigned short) lightmap_textures + s->lightmaptexturenum;
-               wallpoly[currentwallpoly].glowtexnum = (unsigned short) t->gl_glowtexturenum;
-               wallpoly[currentwallpoly].firstvert = currentwallvert;
-               wallpoly[currentwallpoly].numverts = p->numverts;
-               wallpoly[currentwallpoly++].lit = true;
-               for (i = 0;i<p->numverts;i++, v += VERTEXSIZE)
+               wp->texnum = (unsigned short) t->gl_texturenum;
+               wp->lighttexnum = (unsigned short) (lightmap_textures + s->lightmaptexturenum);
+               wp->glowtexnum = (unsigned short) t->gl_glowtexturenum;
+               wp->firstvert = currentwallvert;
+               wp->numverts = p->numverts;
+               wp->lit = lit;
+               wp++;
+               currentwallvert += p->numverts;
+               for (i = 0;i < p->numverts;i++, v += VERTEXSIZE, wv += 6, out++)
                {
-                       if (lighthalf)
+                       if (lit)
                        {
-                               wallvert[currentwallvert].r = (byte) (bound(0, (int) wv[3] >> 1, 255));
-                               wallvert[currentwallvert].g = (byte) (bound(0, (int) wv[4] >> 1, 255));
-                               wallvert[currentwallvert].b = (byte) (bound(0, (int) wv[5] >> 1, 255));
-                               wallvert[currentwallvert].a = 255;
-                       }
-                       else
-                       {
-                               wallvert[currentwallvert].r = (byte) (bound(0, (int) wv[3], 255));
-                               wallvert[currentwallvert].g = (byte) (bound(0, (int) wv[4], 255));
-                               wallvert[currentwallvert].b = (byte) (bound(0, (int) wv[5], 255));
-                               wallvert[currentwallvert].a = 255;
+                               if (lighthalf)
+                               {
+                                       out->r = (byte) (bound(0, (int) wv[3] >> 1, 255));
+                                       out->g = (byte) (bound(0, (int) wv[4] >> 1, 255));
+                                       out->b = (byte) (bound(0, (int) wv[5] >> 1, 255));
+                                       out->a = 255;
+                               }
+                               else
+                               {
+                                       out->r = (byte) (bound(0, (int) wv[3], 255));
+                                       out->g = (byte) (bound(0, (int) wv[4], 255));
+                                       out->b = (byte) (bound(0, (int) wv[5], 255));
+                                       out->a = 255;
+                               }
                        }
-                       wallvert[currentwallvert].vert[0] = wv[0];
-                       wallvert[currentwallvert].vert[1] = wv[1];
-                       wallvert[currentwallvert].vert[2] = wv[2];
-                       wallvert[currentwallvert].s = v[3];
-                       wallvert[currentwallvert].t = v[4];
-                       wallvert[currentwallvert].u = v[5];
-                       wallvert[currentwallvert++].v = v[6];
-                       wv += 6;
+                       out->vert[0] = wv[0];
+                       out->vert[1] = wv[1];
+                       out->vert[2] = wv[2];
+                       out->s = v[3];
+                       out->t = v[4];
+                       out->u = v[5];
+                       out->v = v[6];
                }
        }
 }
@@ -534,32 +556,15 @@ void R_WallSurf(msurface_t *s, texture_t *t, qboolean transform)
 // LordHavoc: transparent brush models
 extern int r_dlightframecount;
 extern float modelalpha;
-//extern vec3_t shadecolor;
-//qboolean R_CullBox (vec3_t mins, vec3_t maxs);
-//void R_DynamicLightPoint(vec3_t color, vec3_t org, int *dlightbits);
-//void R_DynamicLightPointNoMask(vec3_t color, vec3_t org);
-//void EmitWaterPolys (msurface_t *fa);
 
-void R_WallSurfVertex(msurface_t *s, texture_t *t, qboolean transform, qboolean isbmodel)
+void RSurf_DrawWallVertex(msurface_t *s, texture_t *t, int transform, int isbmodel)
 {
-       int                     i, alpha;
-       glpoly_t        *p;
-       float           wvert[64*6], *wv, *v;
-       int                     size3;
-       float           scale;
-       byte            *lm;
-       size3 = ((s->extents[0]>>4)+1)*((s->extents[1]>>4)+1)*3; // *3 for colored lighting
+       int i, alpha, size3;
+       float *v, *wv, scale;
+       glpoly_t *p;
+       byte *lm;
        alpha = (int) (modelalpha * 255.0f);
-       // check for lightmap modification
-       if (r_dynamic.value)
-       {
-               if (r_ambient.value != s->cached_ambient || lighthalf != s->cached_lighthalf
-               || (s->styles[0] != 255 && d_lightstylevalue[s->styles[0]] != s->cached_light[0])
-               || (s->styles[1] != 255 && d_lightstylevalue[s->styles[1]] != s->cached_light[1])
-               || (s->styles[2] != 255 && d_lightstylevalue[s->styles[2]] != s->cached_light[2])
-               || (s->styles[3] != 255 && d_lightstylevalue[s->styles[3]] != s->cached_light[3]))
-                       R_UpdateLightmap(s, s->lightmaptexturenum);
-       }
+       size3 = ((s->extents[0]>>4)+1)*((s->extents[1]>>4)+1)*3; // *3 for colored lighting
        wv = wvert;
        for (p = s->polys;p;p = p->next)
        {
@@ -591,7 +596,7 @@ void R_WallSurfVertex(msurface_t *s, texture_t *t, qboolean transform, qboolean
                }
        }
        if (s->dlightframe == r_dlightframecount && r_dynamic.value)
-               R_LightSurface(s->dlightbits, s->polys, wvert);
+               RSurf_Light(s->dlightbits, s->polys);
        wv = wvert;
        if (isbmodel && (currententity->colormod[0] != 1 || currententity->colormod[1] != 1 || currententity->colormod[2] != 1))
        {
@@ -624,27 +629,26 @@ DrawTextureChains
 */
 extern qboolean hlbsp;
 extern char skyname[];
-//extern qboolean SV_TestLine (hull_t *hull, int num, vec3_t p1, vec3_t p2);
-void R_DrawSurf(msurface_t *s, qboolean isbmodel, qboolean vertexlit)
+void R_DrawSurf(msurface_t *s, int isbmodel, int vertexlit)
 {
        texture_t *t;
        if (s->flags & SURF_DRAWSKY)
        {
                skyisvisible = true;
                if (!hlbsp) // LordHavoc: HalfLife maps have freaky skypolys...
-                       R_SkySurf(s, false);
+                       RSurf_DrawSky(s, false);
                return;
        }
        t = R_TextureAnimation (s->texinfo->texture);
        if (s->flags & SURF_DRAWTURB)
        {
-               R_WaterSurf(s, t, false, s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f);
+               RSurf_DrawWater(s, t, false, s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f);
                return;
        }
        if (vertexlit)
-               R_WallSurfVertex(s, t, false, false);
+               RSurf_DrawWallVertex(s, t, false, false);
        else
-               R_WallSurf(s, t, false);
+               RSurf_DrawWall(s, t, false);
 }
 
 void DrawTextureChains (void)
@@ -667,7 +671,7 @@ void DrawTextureChains (void)
                        skyisvisible = true;
                        if (!hlbsp) // LordHavoc: HalfLife maps have freaky skypolys...
                                for (;s;s = s->texturechain)
-                                       R_SkySurf(s, false);
+                                       RSurf_DrawSky(s, false);
                        continue;
                }
                t = R_TextureAnimation (cl.worldmodel->textures[n]);
@@ -676,15 +680,15 @@ void DrawTextureChains (void)
                {
                        int alpha = s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f;
                        for (;s;s = s->texturechain)
-                               R_WaterSurf(s, t, false, alpha);
+                               RSurf_DrawWater(s, t, false, alpha);
                        continue;
                }
                if (gl_vertex.value)
                        for (;s;s = s->texturechain)
-                               R_WallSurfVertex(s, t, false, false);
+                               RSurf_DrawWallVertex(s, t, false, false);
                else
                        for (;s;s = s->texturechain)
-                               R_WallSurf(s, t, false);
+                               RSurf_DrawWall(s, t, false);
        }
 }
 
@@ -701,7 +705,7 @@ void R_DrawBrushModel (entity_t *e)
        vec3_t          mins, maxs;
        msurface_t      *s;
        model_t         *clmodel;
-       qboolean        rotated, vertexlit = false;
+       int     rotated, vertexlit = false;
        texture_t       *t;
        vec3_t          org;
 
@@ -767,19 +771,19 @@ e->angles[0] = -e->angles[0];     // stupid quake bug
 //                     R_DrawSurf(s, true, vertexlit || s->texinfo->texture->transparent);
                        if (s->flags & SURF_DRAWSKY)
                        {
-                               R_SkySurf(s, true);
+                               RSurf_DrawSky(s, true);
                                continue;
                        }
                        t = R_TextureAnimation (s->texinfo->texture);
                        if (s->flags & SURF_DRAWTURB)
                        {
-                               R_WaterSurf(s, t, true, s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f);
+                               RSurf_DrawWater(s, t, true, s->flags & SURF_DRAWNOALPHA ? 255 : r_wateralpha.value*255.0f);
                                continue;
                        }
                        if (vertexlit || s->texinfo->texture->transparent)
-                               R_WallSurfVertex(s, t, true, true);
+                               RSurf_DrawWallVertex(s, t, true, true);
                        else
-                               R_WallSurf(s, t, true);
+                               RSurf_DrawWall(s, t, true);
                }
        }
        UploadLightmaps();
@@ -795,6 +799,12 @@ e->angles[0] = -e->angles[0];      // stupid quake bug
 
 void R_StoreEfrags (efrag_t **ppefrag);
 
+struct nodestack_s
+{
+       int side;
+       mnode_t *node;
+} nodestack[8192];
+
 /*
 ================
 R_WorldNode
@@ -802,14 +812,14 @@ R_WorldNode
 */
 void R_WorldNode ()
 {
-       int             c, side, s = 0;
-       double  dot;
-       struct
-       {
-               double dot;
-               mnode_t *node;
-       } nodestack[8192];
+       int side, texsort, vertex;
+       struct nodestack_s *nstack;
        mnode_t *node;
+       mleaf_t *pleaf;
+       msurface_t *surf, *endsurf, **mark, **endmark;
+       nstack = nodestack;
+       texsort = gl_texsort.value;
+       vertex = gl_vertex.value;
 
        if (!(node = cl.worldmodel->nodes))
                return;
@@ -821,19 +831,19 @@ void R_WorldNode ()
                {
                        if (node->contents != CONTENTS_SOLID)
                        {
-                               mleaf_t         *pleaf;
                                pleaf = (mleaf_t *)node;
 
                                c_leafs++;
-                               if ((c = pleaf->nummarksurfaces))
+                               if (pleaf->nummarksurfaces)
                                {
-                                       msurface_t      **mark;
                                        mark = pleaf->firstmarksurface;
+                                       endmark = mark + pleaf->nummarksurfaces;
                                        do
                                        {
                                                (*mark)->visframe = r_framecount;
                                                mark++;
-                                       } while (--c);
+                                       }
+                                       while (mark < endmark);
                                }
 
                                // deal with model fragments in this leaf
@@ -841,69 +851,89 @@ void R_WorldNode ()
                                        R_StoreEfrags (&pleaf->efrags);
                        }
 
-                       if (!s)
+                       if (nstack <= nodestack)
                                break;
-                       node = nodestack[--s].node;
-                       dot = nodestack[s].dot;
+                       nstack--;
+                       node = nstack->node;
+                       side = nstack->side;
                        goto loc0;
                }
 
                c_nodes++;
 
-       // node is just a decision point, so go down the apropriate sides
+               // node is just a decision point, so go down the apropriate sides
 
-       // find which side of the node we are on
-               dot = (node->plane->type < 3 ? modelorg[node->plane->type] : DotProduct (modelorg, node->plane->normal)) - node->plane->dist;
+               // find which side of the node we are on
+               side = PlaneDist(modelorg, node->plane) < node->plane->dist;
 
-       // recurse down the children, front side first
-               side = dot < 0;
+               // recurse down the children, front side first
                if (node->children[side]->visframe == r_visframecount && R_NotCulledBox(node->children[side]->minmaxs, node->children[side]->minmaxs+3))
                {
-                       nodestack[s].node = node;
-                       nodestack[s++].dot = dot;
+                       nstack->node = node;
+                       nstack->side = !side; // go down back side when we come back up
+                       nstack++;
                        node = node->children[side];
                        continue;
                }
+               side = !side;
 loc0:
 
-               // backside
-               side = dot >= 0;
        // draw stuff
-               if ((c = node->numsurfaces))
+               if (node->numsurfaces)
                {
-                       msurface_t      *surf;
                        surf = cl.worldmodel->surfaces + node->firstsurface;
+                       endsurf = surf + node->numsurfaces;
 
-                       if (side)
+                       if (texsort)
                        {
-                               for (;c;c--, surf++)
+                               if (side)
                                {
-                                       if (surf->visframe == r_framecount && !(surf->flags & SURF_PLANEBACK))
+                                       do
                                        {
-                                               if (gl_texsort.value)
+                                               if (surf->visframe == r_framecount && !(surf->flags & SURF_PLANEBACK))
                                                {
                                                        surf->texturechain = surf->texinfo->texture->texturechain;
                                                        surf->texinfo->texture->texturechain = surf;
                                                }
-                                               else
-                                                       R_DrawSurf(surf, false, gl_vertex.value);
+                                               surf++;
                                        }
+                                       while (surf < endsurf);
                                }
-                       }
-                       else
-                       {
-                               for (;c;c--, surf++)
+                               else
                                {
-                                       if (surf->visframe == r_framecount && (surf->flags & SURF_PLANEBACK))
+                                       do
                                        {
-                                               if (gl_texsort.value)
+                                               if (surf->visframe == r_framecount && (surf->flags & SURF_PLANEBACK))
                                                {
                                                        surf->texturechain = surf->texinfo->texture->texturechain;
                                                        surf->texinfo->texture->texturechain = surf;
                                                }
-                                               else
-                                                       R_DrawSurf(surf, false, gl_vertex.value);
+                                               surf++;
                                        }
+                                       while (surf < endsurf);
+                               }
+                       }
+                       else
+                       {
+                               if (side)
+                               {
+                                       do
+                                       {
+                                               if (surf->visframe == r_framecount && !(surf->flags & SURF_PLANEBACK))
+                                                       R_DrawSurf(surf, false, vertex);
+                                               surf++;
+                                       }
+                                       while (surf < endsurf);
+                               }
+                               else
+                               {
+                                       do
+                                       {
+                                               if (surf->visframe == r_framecount && (surf->flags & SURF_PLANEBACK))
+                                                       R_DrawSurf(surf, false, vertex);
+                                               surf++;
+                                       }
+                                       while (surf < endsurf);
                                }
                        }
                }
@@ -915,10 +945,11 @@ loc0:
                        continue;
                }
 
-               if (!s)
+               if (nstack <= nodestack)
                        break;
-               node = nodestack[--s].node;
-               dot = nodestack[s].dot;
+               nstack--;
+               node = nstack->node;
+               side = nstack->side;
                goto loc0;
        }
 }
@@ -948,14 +979,9 @@ void R_DrawWorld (void)
        if (cl.worldmodel)
                R_WorldNode ();
 
-       glClear (GL_DEPTH_BUFFER_BIT);
-
        R_PushDlights (); // now mark the lit surfaces
 
        DrawTextureChains ();
-
-       glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
-       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 }
 
 
@@ -1022,7 +1048,7 @@ void R_MarkLeaves (void)
 */
 
 // returns a texture number and the position inside it
-int AllocBlock (int w, int h, int *x, int *y)
+int AllocBlock (int w, int h, short *x, short *y)
 {
        int             i, j;
        int             best, best2;
@@ -1063,13 +1089,16 @@ int AllocBlock (int w, int h, int *x, int *y)
                {
                        byte blank[BLOCK_WIDTH*BLOCK_HEIGHT*3];
                        memset(blank, 0, sizeof(blank));
-                       glBindTexture(GL_TEXTURE_2D, lightmap_textures + texnum);
-                       glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-                       glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-                       if (lightmaprgba)
-                               glTexImage2D (GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, blank);
-                       else
-                               glTexImage2D (GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, blank);
+                       if(r_upload.value)
+                       {
+                               glBindTexture(GL_TEXTURE_2D, lightmap_textures + texnum);
+                               glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+                               glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+                               if (lightmaprgba)
+                                       glTexImage2D (GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, blank);
+                               else
+                                       glTexImage2D (GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, blank);
+                       }
                }
 
                for (i=0 ; i<w ; i++)
@@ -1224,12 +1253,14 @@ void GL_CreateSurfaceLightmap (msurface_t *surf)
        if (lightmaprgba)
        {
                R_BuildLightMap (surf, templight, smax * 4);
-               glTexSubImage2D(GL_TEXTURE_2D, 0, surf->light_s, surf->light_t, smax, tmax, GL_RGBA, GL_UNSIGNED_BYTE, templight);
+               if(r_upload.value)
+                       glTexSubImage2D(GL_TEXTURE_2D, 0, surf->light_s, surf->light_t, smax, tmax, GL_RGBA, GL_UNSIGNED_BYTE, templight);
        }
        else
        {
                R_BuildLightMap (surf, templight, smax * 3);
-               glTexSubImage2D(GL_TEXTURE_2D, 0, surf->light_s, surf->light_t, smax, tmax, GL_RGB , GL_UNSIGNED_BYTE, templight);
+               if(r_upload.value)
+                       glTexSubImage2D(GL_TEXTURE_2D, 0, surf->light_s, surf->light_t, smax, tmax, GL_RGB , GL_UNSIGNED_BYTE, templight);
        }
 }
 
@@ -1318,24 +1349,29 @@ void GL_BuildLightmaps (void)
 
        if (nosubimage || nosubimagefragments)
        {
-               if (gl_mtexable)
-                       qglSelectTexture(gl_mtex_enum+1);
+               if(r_upload.value)
+                       if (gl_mtexable)
+                               qglSelectTexture(gl_mtex_enum+1);
                for (i = 0;i < MAX_LIGHTMAPS;i++)
                {
                        if (!allocated[i][0])
                                break;
                        lightmapupdate[i][0] = BLOCK_HEIGHT;
                        lightmapupdate[i][1] = 0;
-                       glBindTexture(GL_TEXTURE_2D, lightmap_textures + i);
-                       glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-                       glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-                       if (lightmaprgba)
-                               glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i]);
-                       else
-                               glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i]);
+                       if(r_upload.value)
+                       {
+                               glBindTexture(GL_TEXTURE_2D, lightmap_textures + i);
+                               glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+                               glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+                               if (lightmaprgba)
+                                       glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGBA, GL_UNSIGNED_BYTE, lightmaps[i]);
+                               else
+                                       glTexImage2D(GL_TEXTURE_2D, 0, 3, BLOCK_WIDTH, BLOCK_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, lightmaps[i]);
+                       }
                }
-               if (gl_mtexable)
-                       qglSelectTexture(gl_mtex_enum+0);
+               if(r_upload.value)
+                       if (gl_mtexable)
+                               qglSelectTexture(gl_mtex_enum+0);
        }
 }