+void Program::add_stages(const Module &mod, const map<string, int> &spec_values)
+{
+ if(has_stages())
+ throw invalid_operation("Program::add_stages");
+
+ switch(mod.get_format())
+ {
+ case Module::GLSL: return add_glsl_stages(static_cast<const GlslModule &>(mod), spec_values);
+ case Module::SPIR_V: return add_spirv_stages(static_cast<const SpirVModule &>(mod), spec_values);
+ default: throw invalid_argument("Program::add_stages");
+ }
+}
+
+bool Program::has_stages() const
+{
+ for(unsigned i=0; i<MAX_STAGES; ++i)
+ if(stage_ids[i])
+ return true;
+ return false;
+}
+
+unsigned Program::add_stage(Stage type)
+{
+ GLenum gl_type;
+ switch(type)
+ {
+ case VERTEX: { static Require _req(ARB_vertex_shader); gl_type = GL_VERTEX_SHADER; } break;
+ case GEOMETRY: { static Require _req(ARB_geometry_shader4); gl_type = GL_GEOMETRY_SHADER; } break;
+ case FRAGMENT: { static Require _req(ARB_fragment_shader); gl_type = GL_FRAGMENT_SHADER; } break;
+ default: throw invalid_argument("Program::add_stage");
+ }
+
+ if(stage_ids[type])
+ throw invalid_operation("Program::add_stage");
+
+ unsigned stage_id = glCreateShader(gl_type);
+ stage_ids[type] = stage_id;
+ glAttachShader(id, stage_id);
+
+#ifdef DEBUG
+ if(!debug_name.empty() && KHR_debug)
+ set_stage_debug_name(stage_id, type);
+#endif
+
+ return stage_id;
+}
+
+void Program::add_glsl_stages(const GlslModule &mod, const map<string, int> &spec_values)
+{
+ module = &mod;
+
+ SL::Compiler compiler;
+ compiler.set_source(mod.get_prepared_source(), "<module>");
+ compiler.specialize(spec_values);
+ compiler.compile(SL::Compiler::PROGRAM);
+#ifdef DEBUG
+ string diagnostics = compiler.get_diagnostics();
+ if(!diagnostics.empty())
+ IO::print("Program diagnostics:\n%s\n", diagnostics);
+#endif
+
+ vector<SL::Stage::Type> stages = compiler.get_stages();
+ for(SL::Stage::Type st: stages)
+ {
+ unsigned stage_id = 0;
+ switch(st)
+ {
+ case SL::Stage::VERTEX: stage_id = add_stage(VERTEX); break;
+ case SL::Stage::GEOMETRY: stage_id = add_stage(GEOMETRY); break;
+ case SL::Stage::FRAGMENT: stage_id = add_stage(FRAGMENT); break;
+ default: throw invalid_operation("Program::add_glsl_stages");
+ }
+
+ string stage_src = compiler.get_stage_glsl(st);
+ const char *src_ptr = stage_src.data();
+ int src_len = stage_src.size();
+ glShaderSource(stage_id, 1, &src_ptr, &src_len);
+
+ if(st==SL::Stage::VERTEX)
+ {
+ for(const auto &kvp: compiler.get_vertex_attributes())
+ glBindAttribLocation(id, kvp.second, kvp.first.c_str());
+ }
+
+ if(st==SL::Stage::FRAGMENT && EXT_gpu_shader4)
+ {
+ for(const auto &kvp: compiler.get_fragment_outputs())
+ glBindFragDataLocation(id, kvp.second, kvp.first.c_str());
+ }
+
+ compile_glsl_stage(stage_id);
+ }
+
+ if(!transient)
+ transient = new TransientData;
+ transient->textures = compiler.get_texture_bindings();
+ transient->blocks = compiler.get_uniform_block_bindings();
+}
+
+void Program::compile_glsl_stage(unsigned stage_id)
+{
+ glCompileShader(stage_id);
+ bool compiled = get_shader_i(stage_id, GL_COMPILE_STATUS);
+
+ GLsizei info_log_len = get_shader_i(stage_id, GL_INFO_LOG_LENGTH);
+ string info_log(info_log_len+1, 0);
+ glGetShaderInfoLog(stage_id, info_log_len+1, &info_log_len, &info_log[0]);
+ info_log.erase(info_log_len);
+ if(module && module->get_format()==Module::GLSL)
+ info_log = static_cast<const GlslModule *>(module)->get_source_map().translate_errors(info_log);
+
+ if(!compiled)
+ throw compile_error(info_log);
+#ifdef DEBUG
+ if(!info_log.empty())
+ IO::print("Shader compile info log:\n%s", info_log);
+#endif
+}
+
+void Program::add_spirv_stages(const SpirVModule &mod, const map<string, int> &spec_values)
+{
+ static Require _req(ARB_gl_spirv);
+ static Require _req2(ARB_ES2_compatibility);
+
+ module = &mod;
+
+ unsigned n_stages = 0;
+ unsigned used_stage_ids[MAX_STAGES];
+ for(const SpirVModule::EntryPoint &e: mod.get_entry_points())
+ {
+ unsigned stage_id = 0;
+ switch(e.stage)
+ {
+ case SpirVModule::VERTEX: stage_id = add_stage(VERTEX); break;
+ case SpirVModule::GEOMETRY: stage_id = add_stage(GEOMETRY); break;
+ case SpirVModule::FRAGMENT: stage_id = add_stage(FRAGMENT); break;
+ default: throw invalid_operation("Program::add_spirv_stages");
+ }
+
+ used_stage_ids[n_stages++] = stage_id;
+ }
+
+ const vector<uint32_t> &code = mod.get_code();
+ glShaderBinary(n_stages, used_stage_ids, GL_SHADER_BINARY_FORMAT_SPIR_V, &code[0], code.size()*4);
+
+ if(!spec_values.empty() && !transient)
+ transient = new TransientData;
+
+ const vector<SpirVModule::Constant> &spec_consts = mod.get_spec_constants();
+ vector<unsigned> spec_id_array;
+ vector<unsigned> spec_value_array;
+ spec_id_array.reserve(spec_consts.size());
+ spec_value_array.reserve(spec_consts.size());
+ for(const SpirVModule::Constant &c: spec_consts)
+ {
+ auto i = spec_values.find(c.name);
+ if(i!=spec_values.end())
+ {
+ spec_id_array.push_back(c.constant_id);
+ spec_value_array.push_back(i->second);
+ transient->spec_values[c.constant_id] = i->second;
+ }
+ }
+
+ auto j = mod.get_entry_points().begin();
+ for(unsigned i=0; i<MAX_STAGES; ++i)
+ if(stage_ids[i])
+ glSpecializeShader(stage_ids[i], j->name.c_str(), spec_id_array.size(), &spec_id_array[0], &spec_value_array[0]);
+}
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"