source/glsl/compiler.cpp

   1 #include <msp/core/algorithm.h>
   2 #include <msp/gl/extensions/ext_gpu_shader4.h>
   3 #include <msp/strings/format.h>
   4 #include <msp/strings/regex.h>
   5 #include <msp/strings/utils.h>
   6 #include "compatibility.h"
   7 #include "compiler.h"
   8 #include "error.h"
   9 #include "generate.h"
  10 #include "optimize.h"
  11 #include "output.h"
  12 #include "resources.h"
  13 #include "shader.h"
  14
  15 #undef interface
  16
  17 using namespace std;
  18
  19 namespace Msp {
  20 namespace GL {
  21 namespace SL {
  22
  23 Compiler::Compiler():
  24         module(0)
  25 { }
  26
  27 Compiler::~Compiler()
  28 {
  29         delete module;
  30 }
  31
  32 void Compiler::clear()
  33 {
  34         delete module;
  35         module = new Module();
  36         imported_names.clear();
  37 }
  38
  39 void Compiler::set_source(const string &source, const string &src_name)
  40 {
  41         clear();
  42         Parser parser;
  43         imported_names.push_back(src_name);
  44         append_module(parser.parse(source, src_name, 1), 0);
  45 }
  46
  47 void Compiler::load_source(IO::Base &io, DataFile::Collection *res, const string &src_name)
  48 {
  49         clear();
  50         Parser parser;
  51         imported_names.push_back(src_name);
  52         append_module(parser.parse(io, src_name, 1), res);
  53 }
  54
  55 void Compiler::load_source(IO::Base &io, const string &src_name)
  56 {
  57         load_source(io, 0, src_name);
  58 }
  59
  60 void Compiler::compile()
  61 {
  62         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  63                 generate(*i);
  64         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); )
  65         {
  66                 if(optimize(*i))
  67                         i = module->stages.begin();
  68                 else
  69                         ++i;
  70         }
  71         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  72                 finalize(*i);
  73 }
  74
  75 void Compiler::add_shaders(Program &program)
  76 {
  77         if(!module)
  78                 throw invalid_operation("Compiler::add_shaders");
  79
  80         try
  81         {
  82                 for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  83                 {
  84                         string stage_src = Formatter().apply(*i);
  85
  86                         if(i->type==Stage::VERTEX)
  87                         {
  88                                 program.attach_shader_owned(new VertexShader(stage_src));
  89                                 for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
  90                                         program.bind_attribute(j->second, j->first);
  91                         }
  92                         else if(i->type==Stage::GEOMETRY)
  93                                 program.attach_shader_owned(new GeometryShader(stage_src));
  94                         else if(i->type==Stage::FRAGMENT)
  95                         {
  96                                 program.attach_shader_owned(new FragmentShader(stage_src));
  97                                 if(EXT_gpu_shader4)
  98                                 {
  99                                         for(map<string, unsigned>::iterator j=i->locations.begin(); j!=i->locations.end(); ++j)
 100                                                 program.bind_fragment_data(j->second, j->first);
 101                                 }
 102                         }
 103                 }
 104         }
 105         catch(const compile_error &e)
 106         {
 107                 static const Regex r_message("^(([0-9]+)\\(([0-9]+)\\) :|ERROR: ([0-9]+):([0-9]+):) (.*)$");
 108                 vector<string> lines = split(e.what(), '\n');
 109                 string translated;
 110                 for(vector<string>::const_iterator i=lines.begin(); i!=lines.end(); ++i)
 111                 {
 112                         RegMatch m = r_message.match(*i);
 113                         if(m)
 114                         {
 115                                 unsigned index = 0;
 116                                 unsigned line = 0;
 117                                 if(m[2])
 118                                 {
 119                                         index = lexical_cast<unsigned>(m[2].str);
 120                                         line = lexical_cast<unsigned>(m[3].str);
 121                                 }
 122                                 else if(m[4])
 123                                 {
 124                                         index = lexical_cast<unsigned>(m[4].str);
 125                                         line = lexical_cast<unsigned>(m[5].str);
 126                                 }
 127                                 const char *src = "<unknown>";
 128                                 if(index==0)
 129                                         src = "<generated>";
 130                                 else if(index-1<imported_names.size())
 131                                         src = imported_names[index-1].c_str();
 132                                 translated += format("%s:%d: %s", src, line, m[6].str);
 133                         }
 134                         else
 135                                 translated += *i;
 136                         translated += '\n';
 137                 }
 138
 139                 throw compile_error(translated);
 140         }
 141 }
 142
 143 void Compiler::append_module(Module &mod, DataFile::Collection *res)
 144 {
 145         vector<Import *> imports = NodeGatherer<Import>().apply(mod.shared);
 146         for(vector<Import *>::iterator i=imports.begin(); i!=imports.end(); ++i)
 147                 import(res, (*i)->module);
 148         NodeRemover(set<Node *>(imports.begin(), imports.end())).apply(mod.shared);
 149
 150         append_stage(mod.shared);
 151         for(list<Stage>::iterator i=mod.stages.begin(); i!=mod.stages.end(); ++i)
 152                 append_stage(*i);
 153 }
 154
 155 void Compiler::append_stage(Stage &stage)
 156 {
 157         Stage *target = 0;
 158         if(stage.type==Stage::SHARED)
 159                 target = &module->shared;
 160         else
 161         {
 162                 list<Stage>::iterator i;
 163                 for(i=module->stages.begin(); (i!=module->stages.end() && i->type<stage.type); ++i) ;
 164                 if(i==module->stages.end() || i->type>stage.type)
 165                 {
 166                         list<Stage>::iterator j = module->stages.insert(i, stage.type);
 167                         if(i!=module->stages.end())
 168                                 i->previous = &*j;
 169                         i = j;
 170                         if(i!=module->stages.begin())
 171                                 i->previous = &*--j;
 172                 }
 173
 174                 target = &*i;
 175         }
 176
 177         if(stage.required_version>target->required_version)
 178                 target->required_version = stage.required_version;
 179         for(NodeList<Statement>::iterator i=stage.content.body.begin(); i!=stage.content.body.end(); ++i)
 180                 target->content.body.push_back(*i);
 181         DeclarationCombiner().apply(*target);
 182 }
 183
 184 void Compiler::import(DataFile::Collection *resources, const string &name)
 185 {
 186         string fn = name+".glsl";
 187         if(find(imported_names, fn)!=imported_names.end())
 188                 return;
 189         imported_names.push_back(fn);
 190
 191         RefPtr<IO::Seekable> io = (resources ? resources->open_raw(fn) : Resources::get_builtins().open(fn));
 192         if(!io)
 193                 throw runtime_error(format("module %s not found", name));
 194         Parser import_parser;
 195         append_module(import_parser.parse(*io, fn, imported_names.size()), resources);
 196 }
 197
 198 void Compiler::generate(Stage &stage)
 199 {
 200         if(module->shared.required_version>stage.required_version)
 201                 stage.required_version = module->shared.required_version;
 202         inject_block(stage.content, module->shared.content);
 203
 204         DeclarationReorderer().apply(stage);
 205         FunctionResolver().apply(stage);
 206         VariableResolver().apply(stage);
 207         InterfaceGenerator().apply(stage);
 208         VariableResolver().apply(stage);
 209         DeclarationReorderer().apply(stage);
 210         FunctionResolver().apply(stage);
 211         LegacyConverter().apply(stage);
 212 }
 213
 214 bool Compiler::optimize(Stage &stage)
 215 {
 216         ConstantConditionEliminator().apply(stage);
 217
 218         set<FunctionDeclaration *> inlineable = InlineableFunctionLocator().apply(stage);
 219         FunctionInliner(inlineable).apply(stage);
 220
 221         set<Node *> unused = UnusedVariableLocator().apply(stage);
 222         set<Node *> unused2 = UnusedFunctionLocator().apply(stage);
 223         unused.insert(unused2.begin(), unused2.end());
 224         NodeRemover(unused).apply(stage);
 225
 226         return !unused.empty();
 227 }
 228
 229 void Compiler::finalize(Stage &stage)
 230 {
 231         if(get_gl_api()==OPENGL_ES2)
 232                 DefaultPrecisionGenerator().apply(stage);
 233         else
 234                 PrecisionRemover().apply(stage);
 235 }
 236
 237 void Compiler::inject_block(Block &target, const Block &source)
 238 {
 239         NodeList<Statement>::iterator insert_point = target.body.begin();
 240         for(NodeList<Statement>::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
 241                 target.body.insert(insert_point, (*i)->clone());
 242 }
 243
 244 } // namespace SL
 245 } // namespace GL
 246 } // namespace Msp