/**
* @brief General surface drawing function, that draw the surface chains
* @note The needed states for the surfaces must be set before you call this
* @sa R_DrawSurface
* @sa R_SetSurfaceState
*/
void R_DrawSurfaces (const mBspSurfaces_t *surfs)
{
int numSurfaces = surfs->count;
mBspSurface_t **surfPtrList = surfs->surfaces;
const int frame = r_locals.frame;
int lastLightMap = 0, lastDeluxeMap = 0;
image_t *lastTexture = NULL;
uint32_t lastFlags = ~0;
while (numSurfaces--) {
const mBspSurface_t *surf = *surfPtrList++;
mBspTexInfo_t *texInfo;
int texFlags;
if (surf->frame != frame)
continue;
/** @todo integrate it better with R_SetSurfaceState - maybe cache somewhere in the mBspSurface_t ? */
texInfo = surf->texinfo;
texFlags = texInfo->flags & (SURF_BLEND33 | SURF_BLEND66 | MSURF_LIGHTMAP); /* should match flags that affect R_SetSurfaceState behavior */
if (texInfo->image != lastTexture || surf->lightmap_texnum != lastLightMap || surf->deluxemap_texnum != lastDeluxeMap || texFlags != lastFlags) {
lastTexture = texInfo->image;
lastLightMap = surf->lightmap_texnum;
lastDeluxeMap = surf->deluxemap_texnum;
lastFlags = texFlags;
R_SetSurfaceState(surf);
}
R_DrawSurface(surf);
}
/* reset state */
if (r_state.active_normalmap)
R_EnableBumpmap(NULL);
R_EnableGlowMap(NULL);
R_Color(NULL);
}
/*
================
D_CacheSurface
================
*/
surfcache_t *
D_CacheSurface(const entity_t *e, msurface_t *surface, int miplevel)
{
surfcache_t *cache;
//
// if the surface is animating or flashing, flush the cache
//
r_drawsurf.texture = R_TextureAnimation(e, surface->texinfo->texture);
r_drawsurf.lightadj[0] = d_lightstylevalue[surface->styles[0]];
r_drawsurf.lightadj[1] = d_lightstylevalue[surface->styles[1]];
r_drawsurf.lightadj[2] = d_lightstylevalue[surface->styles[2]];
r_drawsurf.lightadj[3] = d_lightstylevalue[surface->styles[3]];
//
// see if the cache holds apropriate data
//
cache = surface->cachespots[miplevel];
if (cache && !cache->dlight && surface->dlightframe != r_framecount
&& cache->texture == r_drawsurf.texture
&& cache->lightadj[0] == r_drawsurf.lightadj[0]
&& cache->lightadj[1] == r_drawsurf.lightadj[1]
&& cache->lightadj[2] == r_drawsurf.lightadj[2]
&& cache->lightadj[3] == r_drawsurf.lightadj[3])
return cache;
//
// determine shape of surface
//
surfscale = 1.0 / (1 << miplevel);
r_drawsurf.surfmip = miplevel;
r_drawsurf.surfwidth = surface->extents[0] >> miplevel;
r_drawsurf.rowbytes = r_drawsurf.surfwidth;
r_drawsurf.surfheight = surface->extents[1] >> miplevel;
//
// allocate memory if needed
//
if (!cache) // if a texture just animated, don't reallocate it
{
cache = D_SCAlloc(r_drawsurf.surfwidth,
r_drawsurf.surfwidth * r_drawsurf.surfheight);
surface->cachespots[miplevel] = cache;
cache->owner = &surface->cachespots[miplevel];
cache->mipscale = surfscale;
}
if (surface->dlightframe == r_framecount)
cache->dlight = 1;
else
cache->dlight = 0;
r_drawsurf.surfdat = (pixel_t *)cache->data;
cache->texture = r_drawsurf.texture;
cache->lightadj[0] = r_drawsurf.lightadj[0];
cache->lightadj[1] = r_drawsurf.lightadj[1];
cache->lightadj[2] = r_drawsurf.lightadj[2];
cache->lightadj[3] = r_drawsurf.lightadj[3];
//
// draw and light the surface texture
//
r_drawsurf.surf = surface;
c_surf++;
R_DrawSurface();
return surface->cachespots[miplevel];
}