extern "C" OSL_DLL_EXPORT int
test_shade (int argc, const char *argv[])
{
OIIO::Timer timer;
// Create a new shading system. We pass it the RendererServices
// object that services callbacks from the shading system, NULL for
// the TextureSystem (that just makes 'create' make its own TS), and
// an error handler.
shadingsys = new ShadingSystem (&rend, NULL, &errhandler);
// Register the layout of all closures known to this renderer
// Any closure used by the shader which is not registered, or
// registered with a different number of arguments will lead
// to a runtime error.
register_closures(shadingsys);
// Remember that each shader parameter may optionally have a
// metadata hint [[int lockgeom=...]], where 0 indicates that the
// parameter may be overridden by the geometry itself, for example
// with data interpolated from the mesh vertices, and a value of 1
// means that it is "locked" with respect to the geometry (i.e. it
// will not be overridden with interpolated or
// per-geometric-primitive data).
//
// In order to most fully optimize shader, we typically want any
// shader parameter not explicitly specified to default to being
// locked (i.e. no per-geometry override):
shadingsys->attribute("lockgeom", 1);
// Now we declare our shader.
//
// Each material in the scene is comprised of a "shader group."
// Each group is comprised of one or more "layers" (a.k.a. shader
// instances) with possible connections from outputs of
// upstream/early layers into the inputs of downstream/later layers.
// A shader instance is the combination of a reference to a shader
// master and its parameter values that may override the defaults in
// the shader source and may be particular to this instance (versus
// all the other instances of the same shader).
//
// A shader group declaration typically looks like this:
//
// ShaderGroupRef shadergroup = ss->ShaderGroupBegin ();
// ss->Parameter ("paramname", TypeDesc paramtype, void *value);
// ... and so on for all the other parameters of...
// ss->Shader ("shadertype", "shadername", "layername");
// The Shader() call creates a new instance, which gets
// all the pending Parameter() values made right before it.
// ... and other shader instances in this group, interspersed with...
// ss->ConnectShaders ("layer1", "param1", "layer2", "param2");
// ... and other connections ...
// ss->ShaderGroupEnd ();
//
// It looks so simple, and it really is, except that the way this
// testshade program works is that all the Parameter() and Shader()
// calls are done inside getargs(), as it walks through the command
// line arguments, whereas the connections accumulate and have
// to be processed at the end. Bear with us.
// Start the shader group and grab a reference to it.
shadergroup = shadingsys->ShaderGroupBegin (groupname);
// Get the command line arguments. That will set up all the shader
// instances and their parameters for the group.
getargs (argc, argv);
if (! shadergroup) {
std::cerr << "ERROR: Invalid shader group. Exiting testshade.\n";
return EXIT_FAILURE;
}
shadingsys->attribute (shadergroup.get(), "groupname", groupname);
// Now set up the connections
for (size_t i = 0; i < connections.size(); i += 4) {
if (i+3 < connections.size()) {
std::cout << "Connect "
<< connections[i] << "." << connections[i+1]
<< " to " << connections[i+2] << "." << connections[i+3]
<< "\n";
shadingsys->ConnectShaders (connections[i].c_str(),
connections[i+1].c_str(),
connections[i+2].c_str(),
connections[i+3].c_str());
}
}
// End the group
shadingsys->ShaderGroupEnd ();
if (verbose || do_oslquery) {
std::string pickle;
shadingsys->getattribute (shadergroup.get(), "pickle", pickle);
std::cout << "Shader group:\n---\n" << pickle << "\n---\n";
std::cout << "\n";
ustring groupname;
shadingsys->getattribute (shadergroup.get(), "groupname", groupname);
std::cout << "Shader group \"" << groupname << "\" layers are:\n";
int num_layers = 0;
shadingsys->getattribute (shadergroup.get(), "num_layers", num_layers);
if (num_layers > 0) {
std::vector<const char *> layers (size_t(num_layers), NULL);
shadingsys->getattribute (shadergroup.get(), "layer_names",
TypeDesc(TypeDesc::STRING, num_layers),
&layers[0]);
for (int i = 0; i < num_layers; ++i) {
std::cout << " " << (layers[i] ? layers[i] : "<unnamed>") << "\n";
if (do_oslquery) {
OSLQuery q;
q.init (shadergroup.get(), i);
for (size_t p = 0; p < q.nparams(); ++p) {
const OSLQuery::Parameter *param = q.getparam(p);
std::cout << "\t" << (param->isoutput ? "output " : "")
<< param->type << ' ' << param->name << "\n";
}
}
}
}
std::cout << "\n";
}
if (archivegroup.size())
shadingsys->archive_shadergroup (shadergroup.get(), archivegroup);
if (outputfiles.size() != 0)
std::cout << "\n";
// Set up the named transformations, including shader and object.
// For this test application, we just do this statically; in a real
// renderer, the global named space (like "myspace") would probably
// be static, but shader and object spaces may be different for each
// object.
setup_transformations (rend, Mshad, Mobj);
// Set up the image outputs requested on the command line
setup_output_images (shadingsys, shadergroup);
if (debug)
test_group_attributes (shadergroup.get());
if (num_threads < 1)
num_threads = boost::thread::hardware_concurrency();
double setuptime = timer.lap ();
// Allow a settable number of iterations to "render" the whole image,
// which is useful for time trials of things that would be too quick
// to accurately time for a single iteration
for (int iter = 0; iter < iters; ++iter) {
OIIO::ROI roi (0, xres, 0, yres);
if (use_shade_image)
OSL::shade_image (*shadingsys, *shadergroup, NULL,
*outputimgs[0], outputvarnames,
pixelcenters ? ShadePixelCenters : ShadePixelGrid,
roi, num_threads);
else {
bool save = (iter == (iters-1)); // save on last iteration
#if 0
shade_region (shadergroup.get(), roi, save);
#else
OIIO::ImageBufAlgo::parallel_image (
boost::bind (shade_region, shadergroup.get(), _1, save),
roi, num_threads);
#endif
}
// If any reparam was requested, do it now
if (reparams.size() && reparam_layer.size()) {
for (size_t p = 0; p < reparams.size(); ++p) {
const ParamValue &pv (reparams[p]);
shadingsys->ReParameter (*shadergroup, reparam_layer.c_str(),
pv.name().c_str(), pv.type(),
pv.data());
}
}
}
double runtime = timer.lap();
if (outputfiles.size() == 0)
std::cout << "\n";
// Write the output images to disk
for (size_t i = 0; i < outputimgs.size(); ++i) {
if (outputimgs[i]) {
if (! print_outputs) {
std::string filename = outputimgs[i]->name();
// JPEG, GIF, and PNG images should be automatically saved
// as sRGB because they are almost certainly supposed to
// be displayed on web pages.
using namespace OIIO;
if (Strutil::iends_with (filename, ".jpg") ||
Strutil::iends_with (filename, ".jpeg") ||
Strutil::iends_with (filename, ".gif") ||
Strutil::iends_with (filename, ".png")) {
ImageBuf ccbuf;
ImageBufAlgo::colorconvert (ccbuf, *outputimgs[i],
"linear", "sRGB", false,
"", "");
ccbuf.set_write_format (outputimgs[i]->spec().format);
ccbuf.write (filename);
} else {
outputimgs[i]->write (filename);
}
}
delete outputimgs[i];
outputimgs[i] = NULL;
}
}
// Print some debugging info
if (debug || runstats || profile) {
double writetime = timer.lap();
std::cout << "\n";
std::cout << "Setup: " << OIIO::Strutil::timeintervalformat (setuptime,2) << "\n";
std::cout << "Run : " << OIIO::Strutil::timeintervalformat (runtime,2) << "\n";
std::cout << "Write: " << OIIO::Strutil::timeintervalformat (writetime,2) << "\n";
std::cout << "\n";
std::cout << shadingsys->getstats (5) << "\n";
OIIO::TextureSystem *texturesys = shadingsys->texturesys();
if (texturesys)
std::cout << texturesys->getstats (5) << "\n";
std::cout << ustring::getstats() << "\n";
}
// We're done with the shading system now, destroy it
shadergroup.reset (); // Must release this before destroying shadingsys
delete shadingsys;
return EXIT_SUCCESS;
}
