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;
void gl_backend_init(void)
{
- int i;
-
Cvar_RegisterVariable(&r_render);
Cvar_RegisterVariable(&gl_dither);
Cvar_RegisterVariable(&gl_lockarrays);
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++)
- {
- polyindexarray[i*3+0] = 0;
- polyindexarray[i*3+1] = i + 1;
- polyindexarray[i*3+2] = i + 2;
- }
}
int arraylocked = false;
currenttransvertex = 0;
}
-void R_Mesh_Draw(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 float cr, cg, cb, ca;
- 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;
- }
-
- if (!backendactive)
- 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)
- {
- 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_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];
- 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)
- {
- R_Mesh_Render();
- Con_Printf("mesh queue not empty, flushing.\n");
- }
-
- 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->blendfunc1 == GL_DST_COLOR)
- {
- // check if it is a 2x modulate with framebuffer
- if (m->blendfunc2 == GL_SRC_COLOR)
- scaler *= 0.5f;
- }
- else if (m->blendfunc2 != GL_SRC_COLOR)
- {
- 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))
- {
- 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];
- }
- }
- 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)
- {
- 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
- {
- 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;
- }
- }
-
- 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])
- {
- 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));
- }
-}
-
// 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 wantoverbright)
buf_mesh_t *mesh;
if (!backendactive)
- Sys_Error("R_Mesh_Draw: called when backend is not active\n");
+ Sys_Error("R_Mesh_Draw_GetBuffer: called when backend is not active\n");
if (!m->numtriangles
|| !m->numverts)
- Host_Error("R_Mesh_Draw: no triangles or verts\n");
+ Host_Error("R_Mesh_Draw_GetBuffer: no triangles or verts\n");
// LordHavoc: removed this error condition because with floatcolors 0,
// the 3DFX driver works with very large meshs
{
if (!transranout)
{
- Con_Printf("R_Mesh_Draw: ran out of room for transparent meshs\n");
+ Con_Printf("R_Mesh_Draw_GetBuffer: ran out of room for transparent meshs\n");
transranout = true;
}
return false;
return true;
}
-void R_Mesh_DrawPolygon(rmeshinfo_t *m, int numverts)
-{
- m->index = polyindexarray;
- m->numverts = numverts;
- m->numtriangles = numverts - 2;
- if (m->numtriangles < 1)
- {
- Con_Printf("R_Mesh_DrawPolygon: invalid vertex count\n");
- return;
- }
- if (m->numtriangles >= 256)
- {
- Con_Printf("R_Mesh_DrawPolygon: only up to 256 triangles (258 verts) supported\n");
- return;
- }
- R_Mesh_Draw(m);
-}
-
/*
==============================================================================
projects / xonotic / darkplaces.git / blobdiff