X-Git-Url: http://git.xonotic.org/?a=blobdiff_plain;f=gl_backend.c;h=e97232342774a13138d7356cc33be87436f9a491;hb=45bff1c2dd893d329c86aa043661187b86da6609;hp=dad2ad1f2921b1a73922f5dd66a40ce1e43f3da8;hpb=188909bbb1e525a0e101d508d8e6daaa0b5d54b8;p=xonotic%2Fdarkplaces.git diff --git a/gl_backend.c b/gl_backend.c index dad2ad1f..e9723234 100644 --- a/gl_backend.c +++ b/gl_backend.c @@ -4,13 +4,19 @@ 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_floatcolors = {0, "gl_mesh_floatcolors", "1"}; 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; @@ -63,17 +69,19 @@ void GL_PrintError(int errornumber, char *filename, int linenumber) } #endif -float r_farclip, r_newfarclip; +float r_mesh_farclip; int polyindexarray[768]; static float viewdist; +// sign bits (true if negative) for vpn[] entries, so quick integer compares can be used instead of float compares +static int vpnbit0, vpnbit1, vpnbit2; int c_meshs, c_meshtris, c_transmeshs, c_transtris; -int lightscalebit; -float lightscale; -float overbrightscale; +int lightscalebit; +float lightscale; +float overbrightscale; void SCR_ScreenShot_f (void); @@ -139,7 +147,6 @@ typedef struct } buf_texcoord_t; -static float meshfarclip; static int currentmesh, currenttriangle, currentvertex, backendunits, backendactive, transranout; static buf_mesh_t *buf_mesh; static buf_tri_t *buf_tri; @@ -164,6 +171,19 @@ 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\n", gl_mesh_maxtriangles.integer, gl_mesh_transtriangles.integer); + if (qglDrawRangeElements != NULL) + Con_Printf("glDrawRangeElements detected (max vertices %i, max indices %i)\n", gl_maxdrawrangeelementsvertices, gl_maxdrawrangeelementsindices); + if (strstr(gl_renderer, "3Dfx")) + { + Con_Printf("3Dfx driver detected, forcing gl_mesh_floatcolors to 0 to prevent crashs\n"); + Cvar_SetValueQuick(&gl_mesh_floatcolors, 0); + } + Con_Printf("\n"); + max_verts = max_meshs * 3; max_transverts = max_transmeshs * 3; @@ -211,6 +231,8 @@ static void gl_backend_start(void) static void gl_backend_shutdown(void) { + Con_Printf("OpenGL Backend shutting down\n"); + if (resizingbuffers) Mem_EmptyPool(gl_backend_mempool); else @@ -222,12 +244,23 @@ static void gl_backend_shutdown(void) static void gl_backend_bufferchanges(int init) { - if (gl_mesh_drawmode.integer == 3 && qglDrawRangeElements != NULL) + 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) { - if (gl_mesh_maxtriangles.integer * 3 > gl_maxdrawrangeelementsindices) - Cvar_SetValueQuick(&gl_mesh_maxtriangles, (int) (gl_maxdrawrangeelementsindices / 3)); - if (gl_mesh_maxtriangles.integer * 3 > gl_maxdrawrangeelementsvertices) - Cvar_SetValueQuick(&gl_mesh_maxtriangles, (int) (gl_maxdrawrangeelementsvertices / 3)); + // 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 @@ -241,8 +274,8 @@ static void gl_backend_bufferchanges(int init) if (gl_mesh_transtriangles.integer > 65536) Cvar_SetValueQuick(&gl_mesh_transtriangles, 65536); - if (gl_mesh_batchtriangles.integer < 0) - Cvar_SetValueQuick(&gl_mesh_batchtriangles, 0); + if (gl_mesh_batchtriangles.integer < 1) + Cvar_SetValueQuick(&gl_mesh_batchtriangles, 1); if (gl_mesh_batchtriangles.integer > gl_mesh_maxtriangles.integer) Cvar_SetValueQuick(&gl_mesh_batchtriangles, gl_mesh_maxtriangles.integer); @@ -265,7 +298,6 @@ static void gl_backend_bufferchanges(int init) static void gl_backend_newmap(void) { - r_farclip = r_newfarclip = 2048.0f; } void gl_backend_init(void) @@ -298,7 +330,7 @@ int arraylocked = false; void GL_LockArray(int first, int count) { - if (!arraylocked && gl_supportslockarrays && gl_lockarrays.integer && gl_mesh_drawmode.integer != 0) + if (!arraylocked && gl_supportslockarrays && gl_lockarrays.integer && gl_mesh_drawmode.integer > 0) { qglLockArraysEXT(first, count); CHECKGLERROR @@ -326,9 +358,6 @@ 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; @@ -343,7 +372,7 @@ static void GL_SetupFrame (void) // depth range zNear = 1.0; - zFar = r_farclip; + zFar = r_mesh_farclip; // fov angles fovx = r_refdef.fov_x; @@ -422,7 +451,7 @@ void GL_SetupTextureState(void) { qglDisable(GL_TEXTURE_2D);CHECKGLERROR } - if (gl_mesh_drawmode.integer != 0) + 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 @@ -449,7 +478,7 @@ void GL_SetupTextureState(void) { qglDisable(GL_TEXTURE_2D);CHECKGLERROR } - if (gl_mesh_drawmode.integer != 0) + if (gl_mesh_drawmode.integer > 0) { qglTexCoordPointer(2, GL_FLOAT, sizeof(buf_texcoord_t), buf_texcoord[0]);CHECKGLERROR if (mesh_texture[0]) @@ -466,7 +495,7 @@ void GL_SetupTextureState(void) // called at beginning of frame int usedarrays; -void R_Mesh_Start(void) +void R_Mesh_Start(float farclip) { int i; if (!backendactive) @@ -482,9 +511,12 @@ void R_Mesh_Start(void) currenttransmesh = 0; currenttranstriangle = 0; currenttransvertex = 0; - meshfarclip = 0; transranout = false; + r_mesh_farclip = farclip; viewdist = DotProduct(r_origin, vpn); + vpnbit0 = vpn[0] < 0; + vpnbit1 = vpn[1] < 0; + vpnbit2 = vpn[2] < 0; c_meshs = 0; c_meshtris = 0; @@ -519,7 +551,7 @@ void R_Mesh_Start(void) qglDepthMask(mesh_depthmask);CHECKGLERROR usedarrays = false; - if (gl_mesh_drawmode.integer != 0) + if (gl_mesh_drawmode.integer > 0) { usedarrays = true; qglVertexPointer(3, GL_FLOAT, sizeof(buf_vertex_t), &buf_vertex[0].v[0]);CHECKGLERROR @@ -540,27 +572,6 @@ void R_Mesh_Start(void) int gl_backend_rebindtextures; -void GL_UpdateFarclip(void) -{ - int i; - float farclip; - - // 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; -} - void GL_ConvertColorsFloatToByte(void) { int i, k, total; @@ -711,20 +722,17 @@ void GL_MeshState(buf_mesh_t *mesh) void GL_DrawRangeElements(int firstvert, int endvert, int indexcount, GLuint *index) { unsigned int i, j, in; - if (gl_mesh_drawmode.integer == 3 && qglDrawRangeElements == NULL) - Cvar_SetValueQuick(&gl_mesh_drawmode, 2); - - if (gl_mesh_drawmode.integer == 3) + 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) + 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) + else if (gl_mesh_drawmode.integer >= 1) { // GL 1.1 // feed it manually using glArrayElement @@ -737,10 +745,8 @@ void GL_DrawRangeElements(int firstvert, int endvert, int indexcount, GLuint *in { // GL 1.1 but not using vertex arrays - 3dfx glquake minigl driver // feed it manually - if (gl_mesh_drawmode.integer != 0) - Cvar_SetValueQuick(&gl_mesh_drawmode, 0); qglBegin(GL_TRIANGLES); - if (r_multitexture.integer) + if (mesh_texture[1]) // if the mesh uses multiple textures { // the minigl doesn't have this (because it does not have ARB_multitexture) for (i = 0;i < indexcount;i++) @@ -794,9 +800,8 @@ void R_Mesh_Render(void) CHECKGLERROR - GL_UpdateFarclip(); - - if (!gl_mesh_floatcolors.integer || gl_mesh_drawmode.integer == 0) + // drawmode 0 always uses byte colors + if (!gl_mesh_floatcolors.integer || gl_mesh_drawmode.integer <= 0) GL_ConvertColorsFloatToByte(); if (gl_backend_rebindtextures) @@ -840,7 +845,8 @@ void R_Mesh_Finish(void) { int i; // flush any queued meshs - R_Mesh_Render(); + if (currentmesh) + R_Mesh_Render(); if (backendunits > 1) { @@ -892,10 +898,13 @@ void R_Mesh_Finish(void) void R_Mesh_ClearDepth(void) { - R_Mesh_AddTransparent(); + if (currenttransmesh) + R_Mesh_AddTransparent(); + if (currentmesh) + R_Mesh_Render(); R_Mesh_Finish(); qglClear(GL_DEPTH_BUFFER_BIT); - R_Mesh_Start(); + R_Mesh_Start(r_mesh_farclip); } void R_Mesh_AddTransparent(void) @@ -926,7 +935,7 @@ void R_Mesh_AddTransparent(void) } // map farclip to 0-4095 list range - centerscaler = (TRANSDEPTHRES / r_farclip) * (1.0f / 3.0f); + centerscaler = (TRANSDEPTHRES / r_mesh_farclip) * (1.0f / 3.0f); viewdistcompare = viewdist + 4.0f; memset(buf_sorttranstri_list, 0, TRANSDEPTHRES * sizeof(buf_transtri_t *)); @@ -1060,22 +1069,28 @@ void R_Mesh_Draw(const rmeshinfo_t *m) 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; - } + //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, rejected\n"); + Con_Printf("R_Mesh_Draw: 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) { if (!transranout) @@ -1136,12 +1151,13 @@ void R_Mesh_Draw(const rmeshinfo_t *m) overbright = false; scaler = 1; - if (m->blendfunc2 == GL_SRC_COLOR) + if (m->blendfunc1 == GL_DST_COLOR) { - if (m->blendfunc1 == GL_DST_COLOR) // 2x modulate with framebuffer + // check if it is a 2x modulate with framebuffer + if (m->blendfunc2 == GL_SRC_COLOR) scaler *= 0.5f; } - else + else if (m->blendfunc2 != GL_SRC_COLOR) { if (m->tex[0]) { @@ -1222,180 +1238,9 @@ void R_Mesh_Draw(const rmeshinfo_t *m) 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; - } - - // 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; - } - - if (m->numtriangles > max_meshs || m->numverts > max_verts) - { - Con_Printf("R_Mesh_Draw_NativeOnly: mesh too big for current gl_mesh_maxtriangles setting, rejected\n"); - return; - } - - - if (m->transparent) - { - if (currenttransmesh >= max_transmeshs || (currenttranstriangle + m->numtriangles) > max_transmeshs || (currenttransvertex + m->numverts) > max_transverts) - { - if (!transranout) - { - 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(); - - 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 (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; - } - - 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++) - { - 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) +int R_Mesh_Draw_GetBuffer(rmeshbufferinfo_t *m, int wantoverbright) { // these are static because gcc runs out of virtual registers otherwise int i, j, overbright; @@ -1409,22 +1254,28 @@ int R_Mesh_Draw_GetBuffer(rmeshbufferinfo_t *m) || !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; - } + //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, rejected\n"); + Con_Printf("R_Mesh_Draw_GetBuffer: mesh too big for current gl_mesh_maxtriangles setting, increasing limits\n"); return false; } - if (m->transparent) { + overflowedtransverts += max(m->numtriangles * 3, m->numverts); if (currenttransmesh >= max_transmeshs || (currenttranstriangle + m->numtriangles) > max_transmeshs || (currenttransvertex + m->numverts) > max_transverts) { if (!transranout) @@ -1482,16 +1333,17 @@ int R_Mesh_Draw_GetBuffer(rmeshbufferinfo_t *m) overbright = false; scaler = 1; - if (m->blendfunc2 == GL_SRC_COLOR) + if (m->blendfunc1 == GL_DST_COLOR) { - if (m->blendfunc1 == GL_DST_COLOR) // 2x modulate with framebuffer + // check if it is a 2x modulate with framebuffer + if (m->blendfunc2 == GL_SRC_COLOR) scaler *= 0.5f; } - else + else if (m->blendfunc2 != GL_SRC_COLOR) { if (m->tex[0]) { - overbright = gl_combine.integer; + overbright = wantoverbright && gl_combine.integer; if (overbright) scaler *= 0.25f; } @@ -1604,15 +1456,22 @@ void SCR_UpdateScreen (void) R_TimeReport("finish"); - if (gl_combine.integer && !gl_combine_extension) - Cvar_SetValue("gl_combine", 0); + if (r_textureunits.integer > gl_textureunits) + Cvar_SetValueQuick(&r_textureunits, gl_textureunits); + if (r_textureunits.integer < 1) + Cvar_SetValueQuick(&r_textureunits, 1); + + if (gl_combine.integer && (!gl_combine_extension || r_textureunits.integer < 2)) + Cvar_SetValueQuick(&gl_combine, 0); + + // lighting scale + overbrightscale = 1.0f / (float) (1 << v_overbrightbits.integer); + // lightmaps only lightscalebit = v_overbrightbits.integer; - if (gl_combine.integer && r_multitexture.integer) + if (gl_combine.integer && r_textureunits.integer > 1) lightscalebit += 2; - lightscale = 1.0f / (float) (1 << lightscalebit); - overbrightscale = 1.0f / (float) (1 << v_overbrightbits.integer); R_TimeReport("setup");