/* d_edge.c (description) Copyright (C) 1996-1997 Id Software, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #define NH_DEFINE #include "namehack.h" #include "QF/cvar.h" #include "QF/entity.h" #include "QF/render.h" #include "QF/sys.h" #include "d_local.h" #include "r_internal.h" #include "vid_internal.h" static int miplevel; float sw32_scale_for_mip; static vec3_t transformed_modelorg; void sw32_D_DrawPoly (void) { // this driver takes spans, not polygons } int sw32_D_MipLevelForScale (float scale) { int lmiplevel; if (scale >= sw32_d_scalemip[0]) lmiplevel = 0; else if (scale >= sw32_d_scalemip[1]) lmiplevel = 1; else if (scale >= sw32_d_scalemip[2]) lmiplevel = 2; else lmiplevel = 3; if (lmiplevel < sw32_d_minmip) lmiplevel = sw32_d_minmip; return lmiplevel; } // FIXME: clean this up static void D_DrawSolidSurface (surf_t *surf, int color) { espan_t *span; switch(sw32_r_pixbytes) { case 1: { byte *pdest, pix; int u, u2; pix = color; for (span = surf->spans; span; span = span->pnext) { pdest = (byte *) sw32_d_viewbuffer + sw32_screenwidth * span->v; u = span->u; u2 = span->u + span->count - 1; for (;u <= u2; u++) pdest[u] = pix; } } break; case 2: { short *pdest, pix; int u, u2; pix = sw32_8to16table[color]; for (span = surf->spans; span; span = span->pnext) { pdest = (short *) sw32_d_viewbuffer + sw32_screenwidth * span->v; u = span->u; u2 = span->u + span->count - 1; for (;u <= u2; u++) pdest[u] = pix; } } break; case 4: { int *pdest, pix; int u, u2; pix = d_8to24table[color]; for (span = surf->spans; span; span = span->pnext) { pdest = (int *) sw32_d_viewbuffer + sw32_screenwidth * span->v; u = span->u; u2 = span->u + span->count - 1; for (;u <= u2; u++) pdest[u] = pix; } } break; default: Sys_Error("D_DrawSolidSurface: unsupported r_pixbytes %i", sw32_r_pixbytes); } } static void D_CalcGradients (msurface_t *pface) { float mipscale, t; vec3_t p_temp1, p_saxis, p_taxis; mipscale = 1.0 / (float) (1 << miplevel); sw32_TransformVector (pface->texinfo->vecs[0], p_saxis); sw32_TransformVector (pface->texinfo->vecs[1], p_taxis); t = sw32_xscaleinv * mipscale; sw32_d_sdivzstepu = p_saxis[0] * t; sw32_d_tdivzstepu = p_taxis[0] * t; t = sw32_yscaleinv * mipscale; sw32_d_sdivzstepv = -p_saxis[1] * t; sw32_d_tdivzstepv = -p_taxis[1] * t; sw32_d_sdivzorigin = p_saxis[2] * mipscale - sw32_xcenter * sw32_d_sdivzstepu - sw32_ycenter * sw32_d_sdivzstepv; sw32_d_tdivzorigin = p_taxis[2] * mipscale - sw32_xcenter * sw32_d_tdivzstepu - sw32_ycenter * sw32_d_tdivzstepv; VectorScale (transformed_modelorg, mipscale, p_temp1); t = 0x10000 * mipscale; sw32_sadjust = ((fixed16_t) (DotProduct (p_temp1, p_saxis) * 0x10000 + 0.5)) - ((pface->texturemins[0] << 16) >> miplevel) + pface->texinfo->vecs[0][3] * t; sw32_tadjust = ((fixed16_t) (DotProduct (p_temp1, p_taxis) * 0x10000 + 0.5)) - ((pface->texturemins[1] << 16) >> miplevel) + pface->texinfo->vecs[1][3] * t; // -1 (-epsilon) so we never wander off the edge of the texture sw32_bbextents = ((pface->extents[0] << 16) >> miplevel) - 1; sw32_bbextentt = ((pface->extents[1] << 16) >> miplevel) - 1; } void sw32_D_DrawSurfaces (void) { surf_t *s; msurface_t *pface; surfcache_t *pcurrentcache; vec3_t world_transformed_modelorg; vec3_t local_modelorg; currententity = &r_worldentity; sw32_TransformVector (modelorg, transformed_modelorg); VectorCopy (transformed_modelorg, world_transformed_modelorg); // TODO: could preset a lot of this at mode set time if (r_drawflat->int_val) { for (s = &sw32_surfaces[1]; s < sw32_surface_p; s++) { if (!s->spans) continue; d_zistepu = s->d_zistepu; d_zistepv = s->d_zistepv; d_ziorigin = s->d_ziorigin; D_DrawSolidSurface (s, ((intptr_t) s->data & 0xFF)); sw32_D_DrawZSpans (s->spans); } } else { for (s = &sw32_surfaces[1]; s < sw32_surface_p; s++) { if (!s->spans) continue; sw32_r_drawnpolycount++; d_zistepu = s->d_zistepu; d_zistepv = s->d_zistepv; d_ziorigin = s->d_ziorigin; if (s->flags & SURF_DRAWSKY) { if (!sw32_r_skymade) { sw32_R_MakeSky (); } sw32_D_DrawSkyScans (s->spans); sw32_D_DrawZSpans (s->spans); } else if (s->flags & SURF_DRAWBACKGROUND) { // set up a gradient for the background surface that places // it effectively at infinity distance from the viewpoint d_zistepu = 0; d_zistepv = 0; d_ziorigin = -0.9; D_DrawSolidSurface (s, r_clearcolor->int_val & 0xFF); sw32_D_DrawZSpans (s->spans); } else if (s->flags & SURF_DRAWTURB) { pface = s->data; miplevel = 0; sw32_cacheblock = ((byte *) pface->texinfo->texture + pface->texinfo->texture->offsets[0]); sw32_cachewidth = 64; if (s->insubmodel) { // FIXME: we don't want to do all this for every polygon! // TODO: store once at start of frame currententity = s->entity; // FIXME: make this passed in // to sw32_R_RotateBmodel () VectorSubtract (r_origin, Transform_GetWorldPosition (currententity->transform), local_modelorg); sw32_TransformVector (local_modelorg, transformed_modelorg); sw32_R_RotateBmodel (); // FIXME: don't mess with the // frustum, make entity passed in } D_CalcGradients (pface); sw32_Turbulent (s->spans); sw32_D_DrawZSpans (s->spans); if (s->insubmodel) { // restore the old drawing state // FIXME: we don't want to do this every time! // TODO: speed up currententity = &r_worldentity; VectorCopy (world_transformed_modelorg, transformed_modelorg); VectorCopy (base_vpn, vpn); VectorCopy (base_vup, vup); VectorCopy (base_vright, vright); VectorCopy (base_modelorg, modelorg); sw32_R_TransformFrustum (); } } else { if (s->insubmodel) { // FIXME: we don't want to do all this for every polygon! // TODO: store once at start of frame currententity = s->entity; // FIXME: make this passed in // to sw32_R_RotateBmodel () VectorSubtract (r_origin, Transform_GetWorldPosition (currententity->transform), local_modelorg); sw32_TransformVector (local_modelorg, transformed_modelorg); sw32_R_RotateBmodel (); // FIXME: don't mess with the // frustum, make entity passed in } pface = s->data; miplevel = sw32_D_MipLevelForScale (s->nearzi * sw32_scale_for_mip * pface->texinfo->mipadjust); // FIXME: make this passed in to D_CacheSurface pcurrentcache = sw32_D_CacheSurface (pface, miplevel); sw32_cacheblock = (byte *) pcurrentcache->data; sw32_cachewidth = pcurrentcache->width; D_CalcGradients (pface); sw32_D_DrawSpans (s->spans); sw32_D_DrawZSpans (s->spans); if (s->insubmodel) { // restore the old drawing state // FIXME: we don't want to do this every time! // TODO: speed up VectorCopy (world_transformed_modelorg, transformed_modelorg); VectorCopy (base_vpn, vpn); VectorCopy (base_vup, vup); VectorCopy (base_vright, vright); VectorCopy (base_modelorg, modelorg); sw32_R_TransformFrustum (); currententity = &r_worldentity; } } } } }