C++ ParamValueList类代码示例

static void
action_param (int argc, const char *argv[])
{
    std::string command = argv[0];
    bool use_reparam = false;
    if (OIIO::Strutil::istarts_with(command, "--reparam") ||
        OIIO::Strutil::istarts_with(command, "-reparam"))
        use_reparam = true;
    ParamValueList &params (use_reparam ? reparams : (::params));

    std::string paramname = argv[1];
    std::string stringval = argv[2];
    TypeDesc type = TypeDesc::UNKNOWN;
    bool unlockgeom = false;
    float f[16];

    size_t pos;
    while ((pos = command.find_first_of(":")) != std::string::npos) {
        command = command.substr (pos+1, std::string::npos);
        std::vector<std::string> splits;
        OIIO::Strutil::split (command, splits, ":", 1);
        if (splits.size() < 1) {}
        else if (OIIO::Strutil::istarts_with(splits[0],"type="))
            type.fromstring (splits[0].c_str()+5);
        else if (OIIO::Strutil::istarts_with(splits[0],"lockgeom="))
            unlockgeom = (strtol (splits[0].c_str()+9, NULL, 10) == 0);
    }

    // If it is or might be a matrix, look for 16 comma-separated floats
    if ((type == TypeDesc::UNKNOWN || type == TypeDesc::TypeMatrix)
        && sscanf (stringval.c_str(),
                   "%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f",
                   &f[0], &f[1], &f[2], &f[3],
                   &f[4], &f[5], &f[6], &f[7], &f[8], &f[9], &f[10], &f[11],
                   &f[12], &f[13], &f[14], &f[15]) == 16) {
        params.push_back (ParamValue());
        params.back().init (paramname, TypeDesc::TypeMatrix, 1, f);
        if (unlockgeom)
            params.back().interp (ParamValue::INTERP_VERTEX);
        return;
    }
    // If it is or might be a vector type, look for 3 comma-separated floats
    if ((type == TypeDesc::UNKNOWN || equivalent(type,TypeDesc::TypeVector))
        && sscanf (stringval.c_str(), "%g, %g, %g", &f[0], &f[1], &f[2]) == 3) {
        if (type == TypeDesc::UNKNOWN)
            type = TypeDesc::TypeVector;
        params.push_back (ParamValue());
        params.back().init (paramname, type, 1, f);
        if (unlockgeom)
            params.back().interp (ParamValue::INTERP_VERTEX);
        return;
    }
    // If it is or might be an int, look for an int that takes up the whole
    // string.
    if ((type == TypeDesc::UNKNOWN || type == TypeDesc::TypeInt)) {
        char *endptr = NULL;
        int ival = strtol(stringval.c_str(),&endptr,10);
        if (endptr && *endptr == 0) {
            params.push_back (ParamValue());
            params.back().init (paramname, TypeDesc::TypeInt, 1, &ival);
            if (unlockgeom)
                params.back().interp (ParamValue::INTERP_VERTEX);
            return;
        }
    }
    // If it is or might be an float, look for a float that takes up the
    // whole string.
    if ((type == TypeDesc::UNKNOWN || type == TypeDesc::TypeFloat)) {
        char *endptr = NULL;
        float fval = (float) strtod(stringval.c_str(),&endptr);
        if (endptr && *endptr == 0) {
            params.push_back (ParamValue());
            params.back().init (paramname, TypeDesc::TypeFloat, 1, &fval);
            if (unlockgeom)
                params.back().interp (ParamValue::INTERP_VERTEX);
            return;
        }
    }

    // All remaining cases -- it's a string
    const char *s = stringval.c_str();
    params.push_back (ParamValue());
    params.back().init (paramname, TypeDesc::TypeString, 1, &s);
    if (unlockgeom)
        params.back().interp (ParamValue::INTERP_VERTEX);
}

static void
action_param (int argc, const char *argv[])
{
    std::string command = argv[0];
    bool use_reparam = false;
    if (OIIO::Strutil::istarts_with(command, "--reparam") ||
        OIIO::Strutil::istarts_with(command, "-reparam"))
        use_reparam = true;
    ParamValueList &params (use_reparam ? reparams : (::params));

    string_view paramname (argv[1]);
    string_view stringval (argv[2]);
    TypeDesc type = TypeDesc::UNKNOWN;
    bool unlockgeom = false;
    float f[16];

    size_t pos;
    while ((pos = command.find_first_of(":")) != std::string::npos) {
        command = command.substr (pos+1, std::string::npos);
        std::vector<std::string> splits;
        OIIO::Strutil::split (command, splits, ":", 1);
        if (splits.size() < 1) {}
        else if (OIIO::Strutil::istarts_with(splits[0],"type="))
            type.fromstring (splits[0].c_str()+5);
        else if (OIIO::Strutil::istarts_with(splits[0],"lockgeom="))
            unlockgeom = (OIIO::Strutil::from_string<int> (splits[0]) == 0);
    }

    // If it is or might be a matrix, look for 16 comma-separated floats
    if ((type == TypeDesc::UNKNOWN || type == TypeDesc::TypeMatrix)
        && sscanf (stringval.c_str(),
                   "%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f",
                   &f[0], &f[1], &f[2], &f[3],
                   &f[4], &f[5], &f[6], &f[7], &f[8], &f[9], &f[10], &f[11],
                   &f[12], &f[13], &f[14], &f[15]) == 16) {
#if OIIO_VERSION >= 10804
        params.emplace_back (paramname, TypeDesc::TypeMatrix, 1, f);
#else
        params.push_back (ParamValue());
        params.back().init (paramname, TypeDesc::TypeMatrix, 1, f);
#endif
        if (unlockgeom)
            params.back().interp (ParamValue::INTERP_VERTEX);
        return;
    }
    // If it is or might be a vector type, look for 3 comma-separated floats
    if ((type == TypeDesc::UNKNOWN || equivalent(type,TypeDesc::TypeVector))
        && sscanf (stringval.c_str(), "%g, %g, %g", &f[0], &f[1], &f[2]) == 3) {
        if (type == TypeDesc::UNKNOWN)
            type = TypeDesc::TypeVector;
#if OIIO_VERSION >= 10804
        params.emplace_back (paramname, type, 1, f);
#else
        params.push_back (ParamValue());
        params.back().init (paramname, type, 1, f);
#endif
        if (unlockgeom)
            params.back().interp (ParamValue::INTERP_VERTEX);
        return;
    }
    // If it is or might be an int, look for an int that takes up the whole
    // string.
    if ((type == TypeDesc::UNKNOWN || type == TypeDesc::TypeInt)
          && OIIO::Strutil::string_is<int>(stringval)) {
#if OIIO_VERSION >= 10804
        params.emplace_back (paramname, OIIO::Strutil::from_string<int>(stringval));
#else
        params.push_back (ParamValue());
        int i = OIIO::Strutil::from_string<int>(stringval);
        params.back().init (paramname, TypeDesc::TypeInt, 1, &i);
#endif
        if (unlockgeom)
            params.back().interp (ParamValue::INTERP_VERTEX);
        return;
    }
    // If it is or might be an float, look for a float that takes up the
    // whole string.
    if ((type == TypeDesc::UNKNOWN || type == TypeDesc::TypeFloat)
          && OIIO::Strutil::string_is<float>(stringval)) {
#if OIIO_VERSION >= 10804
        params.emplace_back (paramname, OIIO::Strutil::from_string<float>(stringval));
#else
        params.push_back (ParamValue());
        float f = OIIO::Strutil::from_string<float>(stringval);
        params.back().init (paramname, TypeDesc::TypeFloat, 1, &f);
#endif
        if (unlockgeom)
            params.back().interp (ParamValue::INTERP_VERTEX);
        return;
    }

    // Catch-all for float types and arrays
    if (type.basetype == TypeDesc::FLOAT) {
        int n = type.aggregate * type.numelements();
        std::vector<float> vals (n);
        for (int i = 0;  i < n;  ++i) {
            OIIO::Strutil::parse_float (stringval, vals[i]);
            OIIO::Strutil::parse_char (stringval, ',');
        }
#if OIIO_VERSION >= 10804
//.........这里部分代码省略.........

// The --expr ARG command line option will take ARG that is a snipped of
// OSL source code, embed it in some boilerplate shader wrapper, compile
// it from memory, and run that in the same way that would have been done
// if it were a compiled shader on disk. The boilerplate assumes that there
// are two output parameters for the shader: color result, and float alpha.
//
// Example use:
//   testshade -v -g 64 64 -o result out.exr -expr 'result=color(u,v,0);'
//
static void
specify_expr (int argc, const char *argv[])
{
    ASSERT (argc == 2);
    std::string shadername = OIIO::Strutil::format("expr_%d", exprcount++);
    std::string sourcecode =
        "shader " + shadername + " (\n"
        "    float s = u [[ int lockgeom=0 ]],\n"
        "    float t = v [[ int lockgeom=0 ]],\n"
        "    output color result = 0,\n"
        "    output float alpha = 1,\n"
        "  )\n"
        "{\n"
        "    " + std::string(argv[1]) + "\n"
        "    ;\n"
        "}\n";
    if (verbose)
        std::cout << "Expression-based shader text is:\n---\n"
                  << sourcecode << "---\n";

    set_shadingsys_options ();

    compile_buffer (sourcecode, shadername);

    inject_params ();
    shadernames.push_back (shadername);
    shadingsys->Shader ("surface", shadername, layername);
    layername.clear ();
    params.clear ();
}

static int
add_shader (int argc, const char *argv[])
{
    shadingsys->attribute ("debug", debug2 ? 2 : (debug ? 1 : 0));
    const char *opt_env = getenv ("TESTSHADE_OPT");  // overrides opt
    if (opt_env)
        shadingsys->attribute ("optimize", atoi(opt_env));
    else if (O0 || O1 || O2)
        shadingsys->attribute ("optimize", O2 ? 2 : (O1 ? 1 : 0));
    shadingsys->attribute ("lockgeom", 1);
    shadingsys->attribute ("debug_nan", debugnan);
    shadingsys->attribute ("debug_uninit", debug_uninit);

    for (int i = 0;  i < argc;  i++) {
        inject_params ();

        shadernames.push_back (argv[i]);
        shadingsys->Shader ("surface", argv[i],
                            layername.length() ? layername.c_str() : NULL);

        layername.clear ();
        params.clear ();
    }
    return 0;
}

static void
inject_params ()
{
    for (size_t p = 0;  p < params.size();  ++p) {
        const ParamValue &pv (params[p]);
        shadingsys->Parameter (pv.name().c_str(), pv.type(), pv.data(),
                               pv.interp() == ParamValue::INTERP_CONSTANT);
    }
}

static int
add_shader (int argc, const char *argv[])
{
    ASSERT (argc == 1);
    string_view shadername (argv[0]);

    set_shadingsys_options ();

    if (inbuffer)  // Request to exercise the buffer-based API calls
        shader_from_buffers (shadername);

    for (int i = 0;  i < argc;  i++) {
        inject_params ();
        shadernames.push_back (shadername);
        shadingsys->Shader ("surface", shadername, layername);
        layername.clear ();
        params.clear ();
    }
    return 0;
}

extern "C" 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 = ShadingSystem::create (&rend, NULL, &errhandler);
    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.
    ShaderGroupRef shadergroup = shadingsys->ShaderGroupBegin ();

    // Get the command line arguments.  That will set up all the shader
    // instances and their parameters for the group.
    getargs (argc, argv);

    // 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 (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);

    // Set up shader globals and a little test grid of points to shade.
    ShaderGlobals shaderglobals;

    double setuptime = timer.lap ();

    // Optional: high-performance apps may request this thread-specific
    // pointer in order to save a bit of time on each shade.  Just like
    // the name implies, a multithreaded renderer would need to do this
//.........这里部分代码省略.........

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;
//.........这里部分代码省略.........

extern "C" 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_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.
    ShaderGroupRef shadergroup = shadingsys->ShaderGroupBegin ();

    // Get the command line arguments.  That will set up all the shader
    // instances and their parameters for the group.
    getargs (argc, argv);

    // 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 (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 ();

//.........这里部分代码省略.........