1 #include <msp/core/algorithm.h>
2 #include <msp/core/hash.h>
3 #include <msp/core/raii.h>
4 #include <msp/strings/lexicalcast.h>
6 #include "glsl_error.h"
15 StructOrganizer::StructOrganizer():
19 void StructOrganizer::visit(StructDeclaration &strct)
21 SetForScope<int> set_offset(offset, 0);
22 TraversingVisitor::visit(strct);
25 void StructOrganizer::visit(VariableDeclaration &var)
29 int *layout_offset = 0;
32 vector<Layout::Qualifier> &qualifiers = var.layout->qualifiers;
33 for(vector<Layout::Qualifier>::iterator i=qualifiers.begin(); i!=qualifiers.end(); ++i)
34 if(i->name=="offset" && i->has_value)
36 layout_offset = &i->value;
43 MemoryRequirementsCalculator::Result mem_reqs = MemoryRequirementsCalculator().apply(var);
44 offset += mem_reqs.alignment-1;
45 offset -= offset%mem_reqs.alignment;
48 *layout_offset = offset;
52 var.layout = new Layout;
54 Layout::Qualifier qual;
56 qual.has_value = true;
58 var.layout->qualifiers.push_back(qual);
61 offset += mem_reqs.size;
66 void LocationAllocator::apply(Module &module, const Features &features)
68 for(list<Stage>::iterator i=module.stages.begin(); i!=module.stages.end(); ++i)
70 allocate_locations("uniform");
72 for(vector<InterfaceBlock *>::const_iterator i=unbound_blocks.begin(); i!=unbound_blocks.end(); ++i)
73 bind_uniform((*i)->layout, (*i)->block_name, features.uniform_binding_range);
74 for(vector<VariableDeclaration *>::const_iterator i=unbound_textures.begin(); i!=unbound_textures.end(); ++i)
75 bind_uniform((*i)->layout, (*i)->name, features.texture_binding_range);
78 void LocationAllocator::apply(Stage &stage)
80 swap(used_locations["in"], used_locations["out"]);
81 used_locations["out"].clear();
83 stage.content.visit(*this);
85 allocate_locations("in");
86 allocate_locations("out");
89 void LocationAllocator::allocate_locations(const string &iface)
91 vector<VariableDeclaration *>::iterator write = unplaced_variables.begin();
93 for(vector<VariableDeclaration *>::const_iterator i=unplaced_variables.begin(); i!=unplaced_variables.end(); ++i)
95 if((*i)->interface!=iface)
103 if((*i)->interface=="uniform")
105 map<string, Uniform>::const_iterator j = uniforms.find((*i)->name);
106 if(j!=uniforms.end() && j->second.location>=0)
108 add_layout_value((*i)->layout, "location", j->second.location);
113 set<unsigned> &used = used_locations[(*i)->interface];
115 unsigned size = LocationCounter().apply(**i);
119 for(unsigned j=0; j<size; ++j)
120 if(used.count(next+j))
127 add_layout_value((*i)->layout, "location", next);
128 if((*i)->interface=="uniform")
129 uniforms[(*i)->name].location = next;
131 for(unsigned j=0; j<size; ++j)
136 unplaced_variables.erase(write, unplaced_variables.end());
139 void LocationAllocator::bind_uniform(RefPtr<Layout> &layout, const string &name, unsigned range)
141 map<string, Uniform>::const_iterator i = uniforms.find(name);
142 if(i!=uniforms.end() && i->second.bind_point>=0)
143 add_layout_value(layout, "binding", i->second.bind_point);
146 set<unsigned> &used = used_bindings[0];
148 unsigned bind_point = fold32(hash64(name))%range;
149 while(used.count(bind_point))
150 bind_point = (bind_point+1)%range;
152 add_layout_value(layout, "binding", bind_point);
153 uniforms[name].bind_point = bind_point;
154 used.insert(bind_point);
158 void LocationAllocator::add_layout_value(RefPtr<Layout> &layout, const string &name, unsigned value)
163 Layout::Qualifier qual;
165 qual.has_value = true;
167 layout->qualifiers.push_back(qual);
170 void LocationAllocator::visit(VariableDeclaration &var)
172 if(!var.name.compare(0, 3, "gl_"))
175 if(!var.interface.empty())
177 int location = (var.layout ? get_layout_value(*var.layout, "location") : -1);
179 if(location<0 && var.linked_declaration && var.linked_declaration->layout)
181 location = get_layout_value(*var.linked_declaration->layout, "location");
183 add_layout_value(var.layout, "location", location);
188 unsigned size = LocationCounter().apply(var);
189 for(unsigned i=0; i<size; ++i)
190 used_locations[var.interface].insert(location+i);
191 if(var.interface=="uniform")
192 uniforms[var.name].location = location;
195 unplaced_variables.push_back(&var);
198 if(var.interface=="uniform")
200 const TypeDeclaration *type = var.type_declaration;
201 while(const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(type))
202 type = basic->base_type;
203 if(dynamic_cast<const ImageTypeDeclaration *>(type))
205 int bind_point = (var.layout ? get_layout_value(*var.layout, "binding") : -1);
208 used_bindings[0].insert(bind_point);
209 uniforms[var.name].bind_point = bind_point;
212 unbound_textures.push_back(&var);
217 void LocationAllocator::visit(InterfaceBlock &iface)
219 if(!iface.instance_name.compare(0, 3, "gl_"))
222 if(iface.interface=="uniform")
224 int bind_point = (iface.layout ? get_layout_value(*iface.layout, "binding") : -1);
228 used_bindings[0].insert(bind_point);
229 uniforms[iface.block_name].bind_point = bind_point;
232 unbound_blocks.push_back(&iface);
237 PrecisionConverter::PrecisionConverter():
241 void PrecisionConverter::apply(Stage &s)
244 s.content.visit(*this);
245 NodeRemover().apply(s, nodes_to_remove);
248 void PrecisionConverter::visit(Block &block)
250 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); ++i)
252 if(&block==&stage->content)
258 void PrecisionConverter::visit(Precision &prec)
260 if(stage->required_features.gl_api==OPENGL_ES2)
261 have_default.insert(prec.type);
263 nodes_to_remove.insert(&prec);
266 void PrecisionConverter::visit(VariableDeclaration &var)
268 if(stage->required_features.gl_api!=OPENGL_ES2)
270 var.precision.clear();
274 const char *default_prec = (stage->type==Stage::FRAGMENT ? "mediump" : "highp");
275 const TypeDeclaration *type = var.type_declaration;
278 if(dynamic_cast<const ImageTypeDeclaration *>(type))
280 default_prec = "lowp";
283 else if(const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(type))
285 if(basic->kind==BasicTypeDeclaration::INT || basic->kind==BasicTypeDeclaration::FLOAT)
287 type = basic->base_type;
295 if(!have_default.count(type->name))
297 Precision *prec = new Precision;
298 prec->precision = default_prec;
299 prec->type = type->name;
300 stage->content.body.insert(insert_point, prec);
302 have_default.insert(type->name);
307 LegacyConverter::LegacyConverter():
311 void LegacyConverter::apply(Stage &s, const Features &feat)
315 if(supports_stage(s.type))
317 s.content.visit(*this);
318 NodeRemover().apply(s, nodes_to_remove);
320 if(!stage->required_features.glsl_version)
321 stage->required_features.glsl_version = Version(1, (stage->required_features.gl_api==OPENGL_ES2 ? 0 : 10));
324 unsupported(format("Stage %s is not supported", Stage::get_stage_name(s.type)));
327 void LegacyConverter::unsupported(const string &reason)
329 Diagnostic diagnostic;
330 diagnostic.severity = Diagnostic::ERR;
331 diagnostic.source = GENERATED_SOURCE;
333 diagnostic.message = reason;
334 stage->diagnostics.push_back(diagnostic);
337 void LegacyConverter::visit(Block &block)
339 for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); ++i)
341 if(&block==&stage->content)
342 uniform_insert_point = i;
347 bool LegacyConverter::check_version(const Version &feature_version) const
349 if(features.glsl_version<feature_version)
351 else if(stage->required_features.glsl_version<feature_version)
352 stage->required_features.glsl_version = feature_version;
357 bool LegacyConverter::check_extension(bool Features::*extension) const
359 if(!(features.*extension))
362 stage->required_features.*extension = true;
367 bool LegacyConverter::supports_stage(Stage::Type st) const
369 if(st==Stage::GEOMETRY)
371 if(features.gl_api==OPENGL_ES2)
372 return check_version(Version(3, 20));
374 return check_version(Version(1, 50));
380 bool LegacyConverter::supports_unified_interface_syntax() const
382 if(features.gl_api==OPENGL_ES2)
383 return check_version(Version(3, 0));
385 return check_version(Version(1, 30));
388 void LegacyConverter::visit(VariableReference &var)
390 if(var.declaration==frag_out && !supports_unified_interface_syntax())
392 var.name = "gl_FragColor";
397 void LegacyConverter::visit(Assignment &assign)
399 TraversingVisitor::visit(assign);
400 if(assign.target.declaration==frag_out && !supports_unified_interface_syntax())
401 assign.target.declaration = 0;
404 bool LegacyConverter::supports_unified_sampling_functions() const
406 if(features.gl_api==OPENGL_ES2)
407 return check_version(Version(3, 0));
409 return check_version(Version(1, 30));
412 void LegacyConverter::visit(FunctionCall &call)
414 if(call.declaration && call.declaration->source==BUILTIN_SOURCE)
416 if(!call.name.compare(0, 7, "texture") && call.arguments.size()>=1)
418 const ImageTypeDeclaration *arg_image = dynamic_cast<const ImageTypeDeclaration *>(call.arguments.front()->type);
419 if(arg_image && !supports_unified_sampling_functions())
421 string suffix = call.name.substr(7);
422 call.name = (arg_image->shadow ? "shadow" : "texture");
424 switch(arg_image->dimensions)
426 case ImageTypeDeclaration::ONE: call.name += "1D"; break;
427 case ImageTypeDeclaration::TWO: call.name += "2D"; break;
428 case ImageTypeDeclaration::THREE: call.name += "3D"; break;
429 case ImageTypeDeclaration::CUBE: call.name += "Cube"; break;
434 /* Array textures and the unified sampling function name were
435 both introduced in GLSL 1.30. */
436 if(arg_image->dimensions==ImageTypeDeclaration::ONE || arg_image->dimensions==ImageTypeDeclaration::TWO)
437 check_extension(&Features::ext_texture_array);
438 call.name += "Array";
446 TraversingVisitor::visit(call);
449 bool LegacyConverter::supports_interface_layouts() const
451 if(features.gl_api==OPENGL_ES2)
452 return check_version(Version(3, 0));
453 else if(check_version(Version(3, 30)))
455 else if(check_version(Version(1, 30)))
456 return check_extension(&Features::arb_explicit_attrib_location);
461 bool LegacyConverter::supports_stage_interface_layouts() const
463 if(features.gl_api==OPENGL_ES2)
464 return check_version(Version(3, 10));
465 else if(check_version(Version(4, 10)))
468 return check_extension(&Features::arb_separate_shader_objects);
471 bool LegacyConverter::supports_centroid_sampling() const
473 if(features.gl_api==OPENGL_ES2)
474 return check_version(Version(3, 0));
475 else if(check_version(Version(1, 20)))
478 return check_extension(&Features::ext_gpu_shader4);
481 bool LegacyConverter::supports_sample_sampling() const
483 if(features.gl_api==OPENGL_ES2)
484 return check_version(Version(3, 20));
485 else if(check_version(Version(4, 0)))
488 return check_extension(&Features::arb_gpu_shader5);
491 bool LegacyConverter::supports_uniform_location() const
493 if(features.gl_api==OPENGL_ES2)
494 return check_version(Version(3, 10));
495 else if(check_version(Version(4, 30)))
498 return check_extension(&Features::arb_explicit_uniform_location);
501 bool LegacyConverter::supports_binding() const
503 if(features.gl_api==OPENGL_ES2)
504 return check_version(Version(3, 10));
506 return check_version(Version(4, 20));
509 void LegacyConverter::visit(VariableDeclaration &var)
513 for(vector<Layout::Qualifier>::const_iterator i=var.layout->qualifiers.begin(); i!=var.layout->qualifiers.end(); )
515 if(i->name=="location")
517 bool supported = true;
518 bool external = false;
519 if(var.interface=="in")
521 external = (stage->type==Stage::VERTEX);
522 supported = (external ? supports_interface_layouts() : supports_stage_interface_layouts());
524 else if(var.interface=="out")
526 external = (stage->type==Stage::FRAGMENT);
527 supported = (external ? supports_interface_layouts() : supports_stage_interface_layouts());
528 if(external && !supported && !check_extension(&Features::ext_gpu_shader4))
532 unsupported("EXT_gpu_shader4 required for multiple fragment shader outputs");
535 else if(var.interface=="uniform")
536 supported = supports_uniform_location();
541 stage->locations[var.name] = i->value;
542 i = var.layout->qualifiers.erase(i);
547 else if(i->name=="binding" && !supports_binding())
549 const TypeDeclaration *type = var.type_declaration;
550 while(const BasicTypeDeclaration *basic = dynamic_cast<const BasicTypeDeclaration *>(type))
551 type = basic->base_type;
552 if(dynamic_cast<const ImageTypeDeclaration *>(type))
553 stage->texture_bindings[var.name] = i->value;
555 i = var.layout->qualifiers.erase(i);
561 if(var.layout->qualifiers.empty())
565 if(var.sampling=="centroid")
567 if(!supports_centroid_sampling())
568 var.sampling = string();
570 else if(var.sampling=="sample")
572 if(!supports_sample_sampling())
573 var.sampling = string();
576 if((var.interface=="in" || var.interface=="out") && !supports_unified_interface_syntax())
578 if(stage->type==Stage::FRAGMENT && var.interface=="out")
581 nodes_to_remove.insert(&var);
585 TraversingVisitor::visit(var);
588 bool LegacyConverter::supports_interface_blocks(const string &iface) const
590 if(features.gl_api==OPENGL_ES2)
593 return check_version(Version(3, 0));
595 return check_version(Version(3, 20));
597 else if(check_version(Version(1, 50)))
599 else if(iface=="uniform")
600 return check_extension(&Features::arb_uniform_buffer_object);
605 bool LegacyConverter::supports_interface_block_location() const
607 if(features.gl_api==OPENGL_ES2)
608 return check_version(Version(3, 20));
609 else if(check_version(Version(4, 40)))
612 return check_extension(&Features::arb_enhanced_layouts);
615 void LegacyConverter::visit(InterfaceBlock &iface)
619 for(vector<Layout::Qualifier>::const_iterator i=iface.layout->qualifiers.begin(); i!=iface.layout->qualifiers.end(); )
621 if(i->name=="location" && !supports_interface_block_location())
622 i = iface.layout->qualifiers.erase(i);
623 else if(i->name=="binding" && !supports_binding())
625 stage->uniform_block_bindings[iface.block_name] = i->value;
626 i = iface.layout->qualifiers.erase(i);
632 if(iface.layout->qualifiers.empty())
636 if(!supports_interface_blocks(iface.interface) && iface.type_declaration)
638 if(!iface.instance_name.empty())
639 unsupported("ARB_uniform_buffer_object required for interface block instances");
640 else if(iface.struct_declaration)
642 stage->content.body.splice(uniform_insert_point, iface.struct_declaration->members.body);
643 nodes_to_remove.insert(&iface);
644 nodes_to_remove.insert(iface.struct_declaration);
647 /* If the interface block is an array, it should have an instance
648 name too, so this should never be reached */
649 throw logic_error("Unexpected interface block configuration");