void material_internal::set(const char *pass_name) const
{
if(!pass_name)
return;
if(m_last_set_pass_idx>=0)
unset();
m_last_set_pass_idx=get_pass_idx(pass_name);
if(m_last_set_pass_idx<0)
return;
update_passes_maps();
const pass &p=m_passes[m_last_set_pass_idx];
p.m_shader.internal().set();
for(int uniform_idx=0;uniform_idx<(int)p.m_uniforms_idxs_map.size();++uniform_idx)
m_params[p.m_uniforms_idxs_map[uniform_idx]].apply_to_shader(p.m_shader,uniform_idx);
for(int i=0;i<(int)p.m_pass_params.size();++i)
{
const pass::pass_param &pp=p.m_pass_params[i];
p.m_shader.internal().set_uniform_value(pp.uniform_idx,pp.p.f[0],pp.p.f[1],pp.p.f[2],pp.p.f[3]);
}
nya_render::set_state(p.m_render_state);
for(int slot_idx=0;slot_idx<(int)p.m_textures_slots_map.size();++slot_idx)
{
int texture_idx=p.m_textures_slots_map[slot_idx];
if(texture_idx<0)
continue;
if(m_textures[texture_idx].proxy.is_valid())
{
if(!m_textures[texture_idx].proxy->internal().set(slot_idx))
{
nya_log::warning()<<"invalid texture for semantics '"<<p.m_shader.internal().get_texture_semantics(slot_idx)<<"' in material '"<<m_name<<"\n";
missing_texture(is_shader_sampler_cube(p.m_shader,slot_idx)).internal().set(slot_idx);
}
}
else
{
nya_log::warning()<<"invalid texture proxy for semantics '"<<p.m_shader.internal().get_texture_semantics(slot_idx)<<"' in material '"<<m_name<<"\n";
missing_texture(is_shader_sampler_cube(p.m_shader,slot_idx)).internal().set(slot_idx);
}
}
}
bool
TextureSystemImpl::environment(TextureHandle* texture_handle_,
Perthread* thread_info_, TextureOpt& options,
const Imath::V3f& _R, const Imath::V3f& _dRdx,
const Imath::V3f& _dRdy, int nchannels,
float* result, float* dresultds,
float* dresultdt)
{
// Handle >4 channel lookups by recursion.
if (nchannels > 4) {
int save_firstchannel = options.firstchannel;
while (nchannels) {
int n = std::min(nchannels, 4);
bool ok = environment(texture_handle_, thread_info_, options, _R,
_dRdx, _dRdy, n, result, dresultds,
dresultdt);
if (!ok)
return false;
result += n;
if (dresultds)
dresultds += n;
if (dresultdt)
dresultdt += n;
options.firstchannel += n;
nchannels -= n;
}
options.firstchannel = save_firstchannel; // restore what we changed
return true;
}
PerThreadInfo* thread_info = m_imagecache->get_perthread_info(
(PerThreadInfo*)thread_info_);
TextureFile* texturefile = verify_texturefile((TextureFile*)texture_handle_,
thread_info);
ImageCacheStatistics& stats(thread_info->m_stats);
++stats.environment_batches;
++stats.environment_queries;
if (!texturefile || texturefile->broken())
return missing_texture(options, nchannels, result, dresultds,
dresultdt);
const ImageSpec& spec(texturefile->spec(options.subimage, 0));
// Environment maps dictate particular wrap modes
options.swrap = texturefile->m_sample_border
? TextureOpt::WrapPeriodicSharedBorder
: TextureOpt::WrapPeriodic;
options.twrap = TextureOpt::WrapClamp;
options.envlayout = LayoutLatLong;
int actualchannels = Imath::clamp(spec.nchannels - options.firstchannel, 0,
nchannels);
// Initialize results to 0. We'll add from here on as we sample.
for (int c = 0; c < nchannels; ++c)
result[c] = 0;
if (dresultds) {
for (int c = 0; c < nchannels; ++c)
dresultds[c] = 0;
for (int c = 0; c < nchannels; ++c)
dresultdt[c] = 0;
}
// If the user only provided us with one pointer, clear both to simplify
// the rest of the code, but only after we zero out the data for them so
// they know something went wrong.
if (!(dresultds && dresultdt))
dresultds = dresultdt = NULL;
// Calculate unit-length vectors in the direction of R, R+dRdx, R+dRdy.
// These define the ellipse we're filtering over.
Imath::V3f R = _R;
R.normalize(); // center
Imath::V3f Rx = _R + _dRdx;
Rx.normalize(); // x axis of the ellipse
Imath::V3f Ry = _R + _dRdy;
Ry.normalize(); // y axis of the ellipse
// angles formed by the ellipse axes.
float xfilt_noblur = std::max(safe_acos(R.dot(Rx)), 1e-8f);
float yfilt_noblur = std::max(safe_acos(R.dot(Ry)), 1e-8f);
int naturalres = int((float)M_PI / std::min(xfilt_noblur, yfilt_noblur));
// FIXME -- figure naturalres sepearately for s and t
// FIXME -- ick, why is it x and y at all, shouldn't it be s and t?
// N.B. naturalres formulated for latlong
// Account for width and blur
float xfilt = xfilt_noblur * options.swidth + options.sblur;
float yfilt = yfilt_noblur * options.twidth + options.tblur;
// Figure out major versus minor, and aspect ratio
Imath::V3f Rmajor; // major axis
float majorlength, minorlength;
bool x_is_majoraxis = (xfilt >= yfilt);
if (x_is_majoraxis) {
Rmajor = Rx;
majorlength = xfilt;
minorlength = yfilt;
} else {
Rmajor = Ry;
majorlength = yfilt;
minorlength = xfilt;
}
sampler_prototype sampler;
long long* probecount;
switch (options.interpmode) {
case TextureOpt::InterpClosest:
sampler = &TextureSystemImpl::sample_closest;
probecount = &stats.closest_interps;
break;
case TextureOpt::InterpBilinear:
sampler = &TextureSystemImpl::sample_bilinear;
probecount = &stats.bilinear_interps;
break;
case TextureOpt::InterpBicubic:
sampler = &TextureSystemImpl::sample_bicubic;
probecount = &stats.cubic_interps;
break;
default:
sampler = &TextureSystemImpl::sample_bilinear;
probecount = &stats.bilinear_interps;
break;
}
TextureOpt::MipMode mipmode = options.mipmode;
bool aniso = (mipmode == TextureOpt::MipModeDefault
|| mipmode == TextureOpt::MipModeAniso);
float aspect, trueaspect, filtwidth;
int nsamples;
float invsamples;
if (aniso) {
aspect = anisotropic_aspect(majorlength, minorlength, options,
trueaspect);
filtwidth = minorlength;
if (trueaspect > stats.max_aniso)
stats.max_aniso = trueaspect;
nsamples = std::max(1, (int)ceilf(aspect - 0.25f));
invsamples = 1.0f / nsamples;
} else {
filtwidth = options.conservative_filter ? majorlength : minorlength;
nsamples = 1;
invsamples = 1.0f;
}
ImageCacheFile::SubimageInfo& subinfo(
texturefile->subimageinfo(options.subimage));
int min_mip_level = subinfo.min_mip_level;
// FIXME -- assuming latlong
bool ok = true;
float pos = -0.5f + 0.5f * invsamples;
for (int sample = 0; sample < nsamples; ++sample, pos += invsamples) {
Imath::V3f Rsamp = R + pos * Rmajor;
float s, t;
vector_to_latlong(Rsamp, texturefile->m_y_up, s, t);
// Determine the MIP-map level(s) we need: we will blend
// data(miplevel[0]) * (1-levelblend) + data(miplevel[1]) * levelblend
int miplevel[2] = { -1, -1 };
float levelblend = 0;
int nmiplevels = (int)subinfo.levels.size();
for (int m = min_mip_level; m < nmiplevels; ++m) {
// Compute the filter size in raster space at this MIP level.
// Filters are in radians, and the vertical resolution of a
// latlong map is PI radians. So to compute the raster size of
// our filter width...
float filtwidth_ras = subinfo.spec(m).full_height * filtwidth
* M_1_PI;
// Once the filter width is smaller than one texel at this level,
// we've gone too far, so we know that we want to interpolate the
// previous level and the current level. Note that filtwidth_ras
// is expected to be >= 0.5, or would have stopped one level ago.
if (filtwidth_ras <= 1) {
miplevel[0] = m - 1;
miplevel[1] = m;
levelblend = Imath::clamp(2.0f * filtwidth_ras - 1.0f, 0.0f,
1.0f);
break;
}
}
if (miplevel[1] < 0) {
// We'd like to blur even more, but make due with the coarsest
// MIP level.
miplevel[0] = nmiplevels - 1;
miplevel[1] = miplevel[0];
levelblend = 0;
} else if (miplevel[0] < min_mip_level) {
// We wish we had even more resolution than the finest MIP level,
// but tough for us.
miplevel[0] = min_mip_level;
miplevel[1] = min_mip_level;
levelblend = 0;
}
if (options.mipmode == TextureOpt::MipModeOneLevel) {
// Force use of just one mipmap level
miplevel[1] = miplevel[0];
levelblend = 0;
} else if (mipmode == TextureOpt::MipModeNoMIP) {
// Just sample from lowest level
miplevel[0] = min_mip_level;
miplevel[1] = min_mip_level;
levelblend = 0;
}
float levelweight[2] = { 1.0f - levelblend, levelblend };
int npointson = 0;
for (int level = 0; level < 2; ++level) {
if (!levelweight[level])
continue;
++npointson;
int lev = miplevel[level];
if (options.interpmode == TextureOpt::InterpSmartBicubic) {
if (lev == 0
|| (texturefile->spec(options.subimage, lev).full_height
< naturalres / 2)) {
sampler = &TextureSystemImpl::sample_bicubic;
++stats.cubic_interps;
} else {
sampler = &TextureSystemImpl::sample_bilinear;
++stats.bilinear_interps;
}
} else {
*probecount += 1;
}
OIIO_SIMD4_ALIGN float sval[4] = { s, 0.0f, 0.0f, 0.0f };
OIIO_SIMD4_ALIGN float tval[4] = { t, 0.0f, 0.0f, 0.0f };
OIIO_SIMD4_ALIGN float weight[4]
= { levelweight[level] * invsamples, 0.0f, 0.0f, 0.0f };
vfloat4 r, drds, drdt;
ok &= (this->*sampler)(1, sval, tval, miplevel[level], *texturefile,
thread_info, options, nchannels,
actualchannels, weight, &r,
dresultds ? &drds : NULL,
dresultds ? &drdt : NULL);
for (int c = 0; c < nchannels; ++c)
result[c] += r[c];
if (dresultds) {
for (int c = 0; c < nchannels; ++c) {
dresultds[c] += drds[c];
dresultdt[c] += drdt[c];
}
}
}
}
stats.aniso_probes += nsamples;
++stats.aniso_queries;
if (actualchannels < nchannels && options.firstchannel == 0
&& m_gray_to_rgb)
fill_gray_channels(spec, nchannels, result, dresultds, dresultdt);
return ok;
}
