/**
* @brief Manages state for stages supporting static, dynamic, and per-pixel lighting.
*/
static void R_StageLighting (const mBspSurface_t *surf, const materialStage_t *stage)
{
/* if the surface has a lightmap, and the stage specifies lighting.. */
if ((surf->flags & MSURF_LIGHTMAP) &&
(stage->flags & (STAGE_LIGHTMAP | STAGE_LIGHTING))) {
R_EnableTexture(&texunit_lightmap, true);
R_BindLightmapTexture(surf->lightmap_texnum);
/* hardware lighting */
/** @todo fix it and enable it back for r_materials 1 */
if (r_materials->integer > 1) {
if ((stage->flags & STAGE_LIGHTING)) {
R_EnableLighting(r_state.world_program, true);
R_SetSurfaceBumpMappingParameters(surf, stage->image->normalmap, stage->image->specularmap);
} else {
R_SetSurfaceBumpMappingParameters(surf, nullptr, nullptr);
R_EnableLighting(nullptr, false);
}
}
} else {
if (!r_state.lighting_enabled)
return;
R_EnableLighting(nullptr, false);
R_EnableTexture(&texunit_lightmap, false);
}
}
/**
* @brief Set the surface state according to surface flags and bind the texture
* @sa R_DrawSurfaces
*/
static void R_SetSurfaceState (const mBspSurface_t *surf)
{
image_t *image;
if (r_state.blend_enabled) { /* alpha blend */
vec4_t color = {1.0, 1.0, 1.0, 1.0};
switch (surf->texinfo->flags & (SURF_BLEND33 | SURF_BLEND66)) {
case SURF_BLEND33:
color[3] = 0.33;
break;
case SURF_BLEND66:
color[3] = 0.66;
break;
}
R_Color(color);
}
image = surf->texinfo->image;
R_BindTexture(image->texnum); /* texture */
if (texunit_lightmap.enabled) { /* lightmap */
if (surf->flags & MSURF_LIGHTMAP)
R_BindLightmapTexture(surf->lightmap_texnum);
}
R_SetSurfaceBumpMappingParameters(surf, image->normalmap, image->specularmap);
R_EnableGlowMap(image->glowmap);
R_CheckError();
}
