/**
* @sa R_ModLoadSurfaces
*/
void R_CreateSurfaceLightmap (mBspSurface_t * surf)
{
int smax, tmax;
byte *samples, *directions;
if (!(surf->flags & MSURF_LIGHTMAP))
return;
smax = (surf->stextents[0] / surf->lightmap_scale) + 1;
tmax = (surf->stextents[1] / surf->lightmap_scale) + 1;
if (!R_AllocLightmapBlock(smax, tmax, &surf->light_s, &surf->light_t)) {
/* upload the last block */
R_UploadLightmapBlock();
if (!R_AllocLightmapBlock(smax, tmax, &surf->light_s, &surf->light_t))
Com_Error(ERR_DROP, "R_CreateSurfaceLightmap: Consecutive calls to R_AllocLightmapBlock(%d,%d) failed (lightmap_scale: %i, stextends: %f %f)\n",
smax, tmax, surf->lightmap_scale, surf->stextents[0], surf->stextents[1]);
}
surf->lightmap_texnum = r_lightmaps.lightmap_texnums[r_lightmaps.lightmap_count];
surf->deluxemap_texnum = r_lightmaps.deluxemap_texnums[r_lightmaps.deluxemap_count];
samples = r_lightmaps.sample_buffer;
samples += (surf->light_t * r_lightmaps.size + surf->light_s) * LIGHTMAP_BLOCK_BYTES;
directions = r_lightmaps.direction_buffer;
directions += (surf->light_t * r_lightmaps.size + surf->light_s) * DELUXEMAP_BLOCK_BYTES;
if (!surf->samples) /* make it fullbright */
R_BuildDefaultLightmap(surf, samples, directions, r_lightmaps.size * LIGHTMAP_BLOCK_BYTES);
else /* or light it properly */
R_BuildLightmap(surf, samples, directions, r_lightmaps.size * LIGHTMAP_BLOCK_BYTES);
}
/**
* @brief Uploads sorted lightmaps from start to (end - 1) and
* puts them in the new maps sized to width/height
*/
static void R_UploadPackedLightmaps(uint32_t width, uint32_t height, r_bsp_model_t *bsp, GSList *start, GSList *end) {
// edge case, no blocks left
if (!width || !height || !start) {
return;
}
// allocate the image
r_image_t *lightmap = R_AllocLightmap(width, height);
r_image_t *deluxemap = R_AllocDeluxemap(width, height);
r_image_t *stainmap = NULL;
if (r_stainmap->integer) {
stainmap = R_AllocStainmap(width, height);
}
// temp buffers
byte *sample_buffer = Mem_Malloc(width * height * 3);
byte *direction_buffer = Mem_Malloc(width * height * 3);
do {
r_bsp_surface_t *surf = (r_bsp_surface_t *) start->data;
const size_t stride = width * 3;
const size_t lightmap_offset = (surf->lightmap_t *width + surf->lightmap_s) * 3;
byte *sout = sample_buffer + lightmap_offset;
byte *dout = direction_buffer + lightmap_offset;
if (surf->lightmap_input) {
byte *stout = NULL;
if (r_stainmap->integer) {
surf->stainmap = stainmap;
stout = surf->stainmap_buffer = Mem_LinkMalloc(surf->lightmap_size[0] * surf->lightmap_size[1] * 3, bsp);
}
R_BuildLightmap(bsp, surf, surf->lightmap_input, sout, dout, stout, stride);
} else {
R_BuildDefaultLightmap(bsp, surf, sout, dout, stride);
}
surf->lightmap = lightmap;
surf->deluxemap = deluxemap;
start = start->next;
} while (start != end);
// upload!
R_UploadImage(lightmap, GL_RGB, sample_buffer);
R_UploadImage(deluxemap, GL_RGB, direction_buffer);
// copy to the stainmap
if (r_stainmap->integer) {
R_UploadImage(stainmap, GL_RGB, sample_buffer);
}
Mem_Free(sample_buffer);
Mem_Free(direction_buffer);
}