// Here we set up transformations. These are just examples, set up so
// that our unit tests can transform among spaces in ways that we will
// recognize as correct. The "shader" and "object" spaces are required
// by OSL and the ShaderGlobals will need to have references to them.
// For good measure, we also set up a "myspace" space, registering it
// with the RendererServices.
//
static void
setup_transformations (SimpleRenderer &rend, OSL::Matrix44 &Mshad,
OSL::Matrix44 &Mobj)
{
Matrix44 M (1,0,0,0, 0,1,0,0, 0,0,1,0, 0,0,0,1);
rend.camera_params (M, ustring("perspective"), 90.0f,
0.1f, 1000.0f, xres, yres);
// Make a "shader" space that is translated one unit in x and rotated
// 45deg about the z axis.
Mshad.makeIdentity ();
Mshad.translate (OSL::Vec3 (1.0, 0.0, 0.0));
Mshad.rotate (OSL::Vec3 (0.0, 0.0, M_PI_4));
// std::cout << "shader-to-common matrix: " << Mshad << "\n";
// Make an object space that is translated one unit in y and rotated
// 90deg about the z axis.
Mobj.makeIdentity ();
Mobj.translate (OSL::Vec3 (0.0, 1.0, 0.0));
Mobj.rotate (OSL::Vec3 (0.0, 0.0, M_PI_2));
// std::cout << "object-to-common matrix: " << Mobj << "\n";
OSL::Matrix44 Mmyspace;
Mmyspace.scale (OSL::Vec3 (1.0, 2.0, 1.0));
// std::cout << "myspace-to-common matrix: " << Mmyspace << "\n";
rend.name_transform ("myspace", Mmyspace);
}
int
main (int argc, const char *argv[])
{
// Create a new shading system.
Timer timer;
SimpleRenderer rend;
shadingsys = ShadingSystem::create (&rend, NULL, &errhandler);
shadingsys->attribute("lockgeom", 1);
shadingsys->ShaderGroupBegin ();
getargs (argc, argv);
if (debug || verbose)
errhandler.verbosity (ErrorHandler::VERBOSE);
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());
}
}
shadingsys->ShaderGroupEnd ();
// getargs called 'add_shader' for each shader mentioned on the command
// line. So now we should have a valid shading state.
ShadingAttribStateRef shaderstate = shadingsys->state ();
// Set up shader globals and a little test grid of points to shade.
ShaderGlobals shaderglobals;
memset(&shaderglobals, 0, sizeof(ShaderGlobals));
// Make a shader space that is translated one unit in x and rotated
// 45deg about the z axis.
OSL::Matrix44 Mshad;
Mshad.translate (OSL::Vec3 (1.0, 0.0, 0.0));
Mshad.rotate (OSL::Vec3 (0.0, 0.0, M_PI_4));
// std::cout << "shader-to-common matrix: " << Mshad << "\n";
OSL::TransformationPtr Mshadptr (&Mshad);
shaderglobals.shader2common = Mshadptr;
// Make an object space that is translated one unit in y and rotated
// 90deg about the z axis.
OSL::Matrix44 Mobj;
Mobj.translate (OSL::Vec3 (0.0, 1.0, 0.0));
Mobj.rotate (OSL::Vec3 (0.0, 0.0, M_PI_2));
// std::cout << "object-to-common matrix: " << Mobj << "\n";
OSL::TransformationPtr Mobjptr (&Mobj);
shaderglobals.object2common = Mobjptr;
// Make a 'myspace that is non-uniformly scaled
OSL::Matrix44 Mmyspace;
Mmyspace.scale (OSL::Vec3 (1.0, 2.0, 1.0));
// std::cout << "myspace-to-common matrix: " << Mmyspace << "\n";
rend.name_transform ("myspace", Mmyspace);
shaderglobals.dudx = 1.0f / xres;
shaderglobals.dvdy = 1.0f / yres;
shaderglobals.raytype = ((ShadingSystemImpl *)shadingsys)->raytype_bit (ustring(raytype));
double setuptime = timer ();
double runtime = 0;
std::vector<float> pixel;
if (outputfiles.size() != 0)
std::cout << "\n";
// grab this once since we will be shading several points
ShadingSystemImpl *ssi = (ShadingSystemImpl *)shadingsys;
void* thread_info = ssi->create_thread_info();
for (int iter = 0; iter < iters; ++iter) {
for (int y = 0, n = 0; y < yres; ++y) {
for (int x = 0; x < xres; ++x, ++n) {
shaderglobals.u = (xres == 1) ? 0.5f : (float) x / (xres - 1);
shaderglobals.v = (yres == 1) ? 0.5f : (float) y / (yres - 1);
shaderglobals.P = Vec3 (shaderglobals.u, shaderglobals.v, 1.0f);
shaderglobals.dPdx = Vec3 (shaderglobals.dudx, shaderglobals.dudy, 0.0f);
shaderglobals.dPdy = Vec3 (shaderglobals.dvdx, shaderglobals.dvdy, 0.0f);
shaderglobals.N = Vec3 (0, 0, 1);
shaderglobals.Ng = Vec3 (0, 0, 1);
shaderglobals.dPdu = Vec3 (1.0f, 0.0f, 0.0f);
shaderglobals.dPdv = Vec3 (0.0f, 1.0f, 0.0f);
shaderglobals.surfacearea = 1;
// Request a shading context, bind it, execute the shaders.
// FIXME -- this will eventually be replaced with a public
// ShadingSystem call that encapsulates it.
ShadingContext *ctx = ssi->get_context (thread_info);
timer.reset ();
timer.start ();
// run shader for this point
ctx->execute (ShadUseSurface, *shaderstate, shaderglobals);
runtime += timer ();
if (iter == (iters - 1)) {
// extract any output vars into images (on last iteration only)
for (size_t i = 0; i < outputfiles.size(); ++i) {
Symbol *sym = ctx->symbol (ShadUseSurface, ustring(outputvars[i]));
if (! sym) {
if (n == 0) {
std::cout << "Output " << outputvars[i] << " not found, skipping.\n";
outputimgs.push_back(0); // invalid image
}
continue;
}
if (n == 0)
std::cout << "Output " << outputvars[i] << " to " << outputfiles[i]<< "\n";
TypeDesc t = sym->typespec().simpletype();
TypeDesc tbase = TypeDesc ((TypeDesc::BASETYPE)t.basetype);
TypeDesc outtypebase = tbase;
if (dataformatname == "uint8")
outtypebase = TypeDesc::UINT8;
else if (dataformatname == "half")
outtypebase = TypeDesc::HALF;
else if (dataformatname == "float")
outtypebase = TypeDesc::FLOAT;
int nchans = t.numelements() * t.aggregate;
pixel.resize (nchans);
if (n == 0) {
OIIO::ImageSpec spec (xres, yres, nchans, outtypebase);
OIIO::ImageBuf* img = new OIIO::ImageBuf(outputfiles[i], spec);
#if OPENIMAGEIO_VERSION >= 900 /* 0.9.0 */
OIIO::ImageBufAlgo::zero (*img);
#else
img->zero ();
#endif
outputimgs.push_back(img);
}
OIIO::convert_types (tbase, ctx->symbol_data (*sym, 0),
TypeDesc::FLOAT, &pixel[0], nchans);
outputimgs[i]->setpixel (x, y, &pixel[0]);
}
}
ssi->release_context (ctx, thread_info);
}
}
}
ssi->destroy_thread_info(thread_info);
if (outputfiles.size() == 0)
std::cout << "\n";
// write any images to disk
for (size_t i = 0; i < outputimgs.size(); ++i) {
if (outputimgs[i]) {
outputimgs[i]->save();
delete outputimgs[i];
}
}
if (debug || stats) {
std::cout << "\n";
std::cout << "Setup: " << Strutil::timeintervalformat (setuptime,2) << "\n";
std::cout << "Run : " << Strutil::timeintervalformat (runtime,2) << "\n";
std::cout << "\n";
std::cout << shadingsys->getstats (5) << "\n";
}
ShadingSystem::destroy (shadingsys);
return EXIT_SUCCESS;
}