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 "compatibility.h"
   5 #include "compiler.h"
   6 #include "error.h"
   7 #include "generate.h"
   8 #include "optimize.h"
   9 #include "output.h"
  10 #include "resources.h"
  11 #include "shader.h"
  12
  13 #undef interface
  14
  15 using namespace std;
  16
  17 namespace Msp {
  18 namespace GL {
  19 namespace SL {
  20
  21 Compiler::Compiler():
  22         module(0)
  23 { }
  24
  25 Compiler::~Compiler()
  26 {
  27         delete module;
  28 }
  29
  30 void Compiler::clear()
  31 {
  32         delete module;
  33         module = new Module();
  34         imported_names.clear();
  35         module->source_map.set_name(0, "<generated>");
  36 }
  37
  38 void Compiler::set_source(const string &source, const string &src_name)
  39 {
  40         clear();
  41         Parser parser;
  42         imported_names.push_back(src_name);
  43         append_module(parser.parse(source, src_name, 1), 0);
  44 }
  45
  46 void Compiler::load_source(IO::Base &io, DataFile::Collection *res, const string &src_name)
  47 {
  48         clear();
  49         Parser parser;
  50         imported_names.push_back(src_name);
  51         append_module(parser.parse(io, src_name, 1), res);
  52 }
  53
  54 void Compiler::load_source(IO::Base &io, const string &src_name)
  55 {
  56         load_source(io, 0, src_name);
  57 }
  58
  59 void Compiler::compile(Mode mode)
  60 {
  61         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  62                 generate(*i, mode);
  63         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); )
  64         {
  65                 if(optimize(*i))
  66                         i = module->stages.begin();
  67                 else
  68                         ++i;
  69         }
  70         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  71                 finalize(*i, mode);
  72 }
  73
  74 string Compiler::get_combined_glsl() const
  75 {
  76         string glsl;
  77
  78         unsigned source_count = module->source_map.get_count();
  79         for(unsigned i=1; i<source_count; ++i)
  80                 glsl += format("#pragma MSP source(%d, \"%s\")\n", i, module->source_map.get_name(i));
  81         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  82         {
  83                 glsl += format("#pragma MSP stage(%s)\n", Stage::get_stage_name(i->type));
  84                 glsl += Formatter().apply(*i, MODULE);
  85                 glsl += '\n';
  86         }
  87
  88         return glsl;
  89 }
  90
  91 vector<Stage::Type> Compiler::get_stages() const
  92 {
  93         vector<Stage::Type> stage_types;
  94         stage_types.reserve(module->stages.size());
  95         for(list<Stage>::const_iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  96                 stage_types.push_back(i->type);
  97         return stage_types;
  98 }
  99
 100 string Compiler::get_stage_glsl(Stage::Type stage_type) const
 101 {
 102         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
 103                 if(i->type==stage_type)
 104                         return Formatter().apply(*i, PROGRAM);
 105         throw key_error(Stage::get_stage_name(stage_type));
 106 }
 107
 108 const map<string, unsigned> &Compiler::get_vertex_attributes() const
 109 {
 110         for(list<Stage>::const_iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
 111                 if(i->type==Stage::VERTEX)
 112                         return i->locations;
 113         throw invalid_operation("Compiler::get_vertex_attributes");
 114 }
 115
 116 const map<string, unsigned> &Compiler::get_fragment_outputs() const
 117 {
 118         for(list<Stage>::const_iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
 119                 if(i->type==Stage::FRAGMENT)
 120                         return i->locations;
 121         throw invalid_operation("Compiler::get_fragment_outputs");
 122 }
 123
 124 const SourceMap &Compiler::get_source_map() const
 125 {
 126         return module->source_map;
 127 }
 128
 129 void Compiler::append_module(Module &mod, DataFile::Collection *res)
 130 {
 131         module->source_map.merge_from(mod.source_map);
 132
 133         vector<Import *> imports = NodeGatherer<Import>().apply(mod.shared);
 134         for(vector<Import *>::iterator i=imports.begin(); i!=imports.end(); ++i)
 135                 import(res, (*i)->module);
 136         NodeRemover().apply(mod.shared, set<Node *>(imports.begin(), imports.end()));
 137
 138         append_stage(mod.shared);
 139         for(list<Stage>::iterator i=mod.stages.begin(); i!=mod.stages.end(); ++i)
 140                 append_stage(*i);
 141 }
 142
 143 void Compiler::append_stage(Stage &stage)
 144 {
 145         Stage *target = 0;
 146         if(stage.type==Stage::SHARED)
 147                 target = &module->shared;
 148         else
 149         {
 150                 list<Stage>::iterator i;
 151                 for(i=module->stages.begin(); (i!=module->stages.end() && i->type<stage.type); ++i) ;
 152                 if(i==module->stages.end() || i->type>stage.type)
 153                 {
 154                         list<Stage>::iterator j = module->stages.insert(i, stage.type);
 155                         if(i!=module->stages.end())
 156                                 i->previous = &*j;
 157                         i = j;
 158                         if(i!=module->stages.begin())
 159                                 i->previous = &*--j;
 160                 }
 161
 162                 target = &*i;
 163         }
 164
 165         if(stage.required_version>target->required_version)
 166                 target->required_version = stage.required_version;
 167         for(NodeList<Statement>::iterator i=stage.content.body.begin(); i!=stage.content.body.end(); ++i)
 168                 target->content.body.push_back(*i);
 169         DeclarationCombiner().apply(*target);
 170 }
 171
 172 void Compiler::import(DataFile::Collection *resources, const string &name)
 173 {
 174         string fn = name+".glsl";
 175         if(find(imported_names, fn)!=imported_names.end())
 176                 return;
 177         imported_names.push_back(fn);
 178
 179         RefPtr<IO::Seekable> io = (resources ? resources->open_raw(fn) : Resources::get_builtins().open(fn));
 180         if(!io)
 181                 throw runtime_error(format("module %s not found", name));
 182         Parser import_parser;
 183         append_module(import_parser.parse(*io, fn, module->source_map.get_count()), resources);
 184 }
 185
 186 void Compiler::generate(Stage &stage, Mode mode)
 187 {
 188         if(module->shared.required_version>stage.required_version)
 189                 stage.required_version = module->shared.required_version;
 190         inject_block(stage.content, module->shared.content);
 191
 192         DeclarationReorderer().apply(stage);
 193         BlockResolver().apply(stage);
 194         FunctionResolver().apply(stage);
 195         VariableResolver().apply(stage);
 196         InterfaceGenerator().apply(stage);
 197         VariableResolver().apply(stage);
 198         DeclarationReorderer().apply(stage);
 199         FunctionResolver().apply(stage);
 200         if(mode==PROGRAM)
 201                 LegacyConverter().apply(stage);
 202 }
 203
 204 bool Compiler::optimize(Stage &stage)
 205 {
 206         ConstantConditionEliminator().apply(stage);
 207
 208         FunctionInliner().apply(stage);
 209         BlockResolver().apply(stage);
 210         VariableResolver().apply(stage);
 211
 212         bool result = UnusedVariableRemover().apply(stage);
 213         result |= UnusedFunctionRemover().apply(stage);
 214
 215         return result;
 216 }
 217
 218 void Compiler::finalize(Stage &stage, Mode mode)
 219 {
 220         if(get_gl_api()==OPENGL_ES2 && mode==PROGRAM)
 221                 DefaultPrecisionGenerator().apply(stage);
 222         else if(mode==MODULE)
 223                 PrecisionRemover().apply(stage);
 224 }
 225
 226 void Compiler::inject_block(Block &target, const Block &source)
 227 {
 228         NodeList<Statement>::iterator insert_point = target.body.begin();
 229         for(NodeList<Statement>::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
 230                 target.body.insert(insert_point, (*i)->clone());
 231 }
 232
 233 } // namespace SL
 234 } // namespace GL
 235 } // namespace Msp