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