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         features(Features::from_context()),
  23         module(0)
  24 { }
  25
  26 Compiler::Compiler(const Features &f):
  27         features(f),
  28         module(0)
  29 { }
  30
  31 Compiler::~Compiler()
  32 {
  33         delete module;
  34 }
  35
  36 void Compiler::clear()
  37 {
  38         delete module;
  39         module = new Module();
  40         imported_names.clear();
  41         module->source_map.set_name(0, "<generated>");
  42 }
  43
  44 void Compiler::set_source(const string &source, const string &src_name)
  45 {
  46         clear();
  47         Parser parser;
  48         imported_names.push_back(src_name);
  49         append_module(parser.parse(source, src_name, 1), 0);
  50 }
  51
  52 void Compiler::load_source(IO::Base &io, DataFile::Collection *res, const string &src_name)
  53 {
  54         clear();
  55         Parser parser;
  56         imported_names.push_back(src_name);
  57         append_module(parser.parse(io, src_name, 1), res);
  58 }
  59
  60 void Compiler::load_source(IO::Base &io, const string &src_name)
  61 {
  62         load_source(io, 0, src_name);
  63 }
  64
  65 void Compiler::compile(Mode mode)
  66 {
  67         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  68                 generate(*i, mode);
  69         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); )
  70         {
  71                 if(optimize(*i))
  72                         i = module->stages.begin();
  73                 else
  74                         ++i;
  75         }
  76         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  77                 finalize(*i, mode);
  78 }
  79
  80 string Compiler::get_combined_glsl() const
  81 {
  82         string glsl;
  83
  84         unsigned source_count = module->source_map.get_count();
  85         for(unsigned i=1; i<source_count; ++i)
  86                 glsl += format("#pragma MSP source(%d, \"%s\")\n", i, module->source_map.get_name(i));
  87         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  88         {
  89                 glsl += format("#pragma MSP stage(%s)\n", Stage::get_stage_name(i->type));
  90                 glsl += Formatter().apply(*i, MODULE);
  91                 glsl += '\n';
  92         }
  93
  94         return glsl;
  95 }
  96
  97 vector<Stage::Type> Compiler::get_stages() const
  98 {
  99         vector<Stage::Type> stage_types;
 100         stage_types.reserve(module->stages.size());
 101         for(list<Stage>::const_iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
 102                 stage_types.push_back(i->type);
 103         return stage_types;
 104 }
 105
 106 string Compiler::get_stage_glsl(Stage::Type stage_type) const
 107 {
 108         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
 109                 if(i->type==stage_type)
 110                         return Formatter().apply(*i, PROGRAM);
 111         throw key_error(Stage::get_stage_name(stage_type));
 112 }
 113
 114 const map<string, unsigned> &Compiler::get_vertex_attributes() const
 115 {
 116         for(list<Stage>::const_iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
 117                 if(i->type==Stage::VERTEX)
 118                         return i->locations;
 119         throw invalid_operation("Compiler::get_vertex_attributes");
 120 }
 121
 122 const map<string, unsigned> &Compiler::get_fragment_outputs() const
 123 {
 124         for(list<Stage>::const_iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
 125                 if(i->type==Stage::FRAGMENT)
 126                         return i->locations;
 127         throw invalid_operation("Compiler::get_fragment_outputs");
 128 }
 129
 130 const SourceMap &Compiler::get_source_map() const
 131 {
 132         return module->source_map;
 133 }
 134
 135 void Compiler::append_module(Module &mod, DataFile::Collection *res)
 136 {
 137         module->source_map.merge_from(mod.source_map);
 138
 139         vector<Import *> imports = NodeGatherer<Import>().apply(mod.shared);
 140         for(vector<Import *>::iterator i=imports.begin(); i!=imports.end(); ++i)
 141                 import(res, (*i)->module);
 142         NodeRemover().apply(mod.shared, set<Node *>(imports.begin(), imports.end()));
 143
 144         append_stage(mod.shared);
 145         for(list<Stage>::iterator i=mod.stages.begin(); i!=mod.stages.end(); ++i)
 146                 append_stage(*i);
 147 }
 148
 149 void Compiler::append_stage(Stage &stage)
 150 {
 151         Stage *target = 0;
 152         if(stage.type==Stage::SHARED)
 153                 target = &module->shared;
 154         else
 155         {
 156                 list<Stage>::iterator i;
 157                 for(i=module->stages.begin(); (i!=module->stages.end() && i->type<stage.type); ++i) ;
 158                 if(i==module->stages.end() || i->type>stage.type)
 159                 {
 160                         list<Stage>::iterator j = module->stages.insert(i, stage.type);
 161                         if(i!=module->stages.end())
 162                                 i->previous = &*j;
 163                         i = j;
 164                         if(i!=module->stages.begin())
 165                                 i->previous = &*--j;
 166                 }
 167
 168                 target = &*i;
 169         }
 170
 171         if(stage.required_features.glsl_version>target->required_features.glsl_version)
 172                 target->required_features.glsl_version = stage.required_features.glsl_version;
 173         for(NodeList<Statement>::iterator i=stage.content.body.begin(); i!=stage.content.body.end(); ++i)
 174                 target->content.body.push_back(*i);
 175         DeclarationCombiner().apply(*target);
 176 }
 177
 178 void Compiler::import(DataFile::Collection *resources, const string &name)
 179 {
 180         string fn = name+".glsl";
 181         if(find(imported_names, fn)!=imported_names.end())
 182                 return;
 183         imported_names.push_back(fn);
 184
 185         RefPtr<IO::Seekable> io = (resources ? resources->open_raw(fn) : Resources::get_builtins().open(fn));
 186         if(!io)
 187                 throw runtime_error(format("module %s not found", name));
 188         Parser import_parser;
 189         append_module(import_parser.parse(*io, fn, module->source_map.get_count()), resources);
 190 }
 191
 192 void Compiler::generate(Stage &stage, Mode mode)
 193 {
 194         stage.required_features.gl_api = features.gl_api;
 195         if(module->shared.required_features.glsl_version>stage.required_features.glsl_version)
 196                 stage.required_features.glsl_version = module->shared.required_features.glsl_version;
 197         inject_block(stage.content, module->shared.content);
 198
 199         DeclarationReorderer().apply(stage);
 200         BlockResolver().apply(stage);
 201         FunctionResolver().apply(stage);
 202         VariableResolver().apply(stage);
 203         InterfaceGenerator().apply(stage);
 204         VariableResolver().apply(stage);
 205         DeclarationReorderer().apply(stage);
 206         FunctionResolver().apply(stage);
 207         if(mode==PROGRAM)
 208                 LegacyConverter().apply(stage, features);
 209 }
 210
 211 bool Compiler::optimize(Stage &stage)
 212 {
 213         ConstantConditionEliminator().apply(stage);
 214
 215         FunctionInliner().apply(stage);
 216         BlockResolver().apply(stage);
 217         VariableResolver().apply(stage);
 218
 219         bool result = UnusedVariableRemover().apply(stage);
 220         result |= UnusedFunctionRemover().apply(stage);
 221
 222         return result;
 223 }
 224
 225 void Compiler::finalize(Stage &stage, Mode mode)
 226 {
 227         if(get_gl_api()==OPENGL_ES2 && mode==PROGRAM)
 228                 DefaultPrecisionGenerator().apply(stage);
 229         else if(mode==MODULE)
 230                 PrecisionRemover().apply(stage);
 231 }
 232
 233 void Compiler::inject_block(Block &target, const Block &source)
 234 {
 235         NodeList<Statement>::iterator insert_point = target.body.begin();
 236         for(NodeList<Statement>::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
 237                 target.body.insert(insert_point, (*i)->clone());
 238 }
 239
 240 } // namespace SL
 241 } // namespace GL
 242 } // namespace Msp