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 "debug.h"
   7 #include "error.h"
   8 #include "generate.h"
   9 #include "optimize.h"
  10 #include "output.h"
  11 #include "resources.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         features(Features::from_context()),
  24         module(0)
  25 { }
  26
  27 Compiler::Compiler(const Features &f):
  28         features(f),
  29         module(0)
  30 { }
  31
  32 Compiler::~Compiler()
  33 {
  34         delete module;
  35 }
  36
  37 void Compiler::clear()
  38 {
  39         delete module;
  40         module = new Module();
  41         imported_names.clear();
  42         module->source_map.set_name(0, "<generated>");
  43 }
  44
  45 void Compiler::set_source(const string &source, const string &src_name)
  46 {
  47         clear();
  48         Parser parser;
  49         imported_names.push_back(src_name);
  50         append_module(parser.parse(source, src_name, 1), 0);
  51 }
  52
  53 void Compiler::load_source(IO::Base &io, DataFile::Collection *res, const string &src_name)
  54 {
  55         clear();
  56         Parser parser;
  57         imported_names.push_back(src_name);
  58         append_module(parser.parse(io, src_name, 1), res);
  59 }
  60
  61 void Compiler::load_source(IO::Base &io, const string &src_name)
  62 {
  63         load_source(io, 0, src_name);
  64 }
  65
  66 void Compiler::compile(Mode mode)
  67 {
  68         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  69                 generate(*i, mode);
  70         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); )
  71         {
  72                 if(optimize(*i))
  73                         i = module->stages.begin();
  74                 else
  75                         ++i;
  76         }
  77         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  78                 finalize(*i, mode);
  79 }
  80
  81 string Compiler::get_combined_glsl() const
  82 {
  83         string glsl;
  84
  85         unsigned source_count = module->source_map.get_count();
  86         for(unsigned i=1; i<source_count; ++i)
  87                 glsl += format("#pragma MSP source(%d, \"%s\")\n", i, module->source_map.get_name(i));
  88         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
  89         {
  90                 glsl += format("#pragma MSP stage(%s)\n", Stage::get_stage_name(i->type));
  91                 glsl += Formatter().apply(*i, MODULE);
  92                 glsl += '\n';
  93         }
  94
  95         return glsl;
  96 }
  97
  98 vector<Stage::Type> Compiler::get_stages() const
  99 {
 100         vector<Stage::Type> stage_types;
 101         stage_types.reserve(module->stages.size());
 102         for(list<Stage>::const_iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
 103                 stage_types.push_back(i->type);
 104         return stage_types;
 105 }
 106
 107 string Compiler::get_stage_glsl(Stage::Type stage_type) const
 108 {
 109         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
 110                 if(i->type==stage_type)
 111                         return Formatter().apply(*i, PROGRAM);
 112         throw key_error(Stage::get_stage_name(stage_type));
 113 }
 114
 115 const map<string, unsigned> &Compiler::get_vertex_attributes() const
 116 {
 117         for(list<Stage>::const_iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
 118                 if(i->type==Stage::VERTEX)
 119                         return i->locations;
 120         throw invalid_operation("Compiler::get_vertex_attributes");
 121 }
 122
 123 const map<string, unsigned> &Compiler::get_fragment_outputs() const
 124 {
 125         for(list<Stage>::const_iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
 126                 if(i->type==Stage::FRAGMENT)
 127                         return i->locations;
 128         throw invalid_operation("Compiler::get_fragment_outputs");
 129 }
 130
 131 const SourceMap &Compiler::get_source_map() const
 132 {
 133         return module->source_map;
 134 }
 135
 136 string Compiler::get_stage_debug(Stage::Type stage_type) const
 137 {
 138         for(list<Stage>::iterator i=module->stages.begin(); i!=module->stages.end(); ++i)
 139                 if(i->type==stage_type)
 140                         return DumpTree().apply(*i);
 141         throw key_error(Stage::get_stage_name(stage_type));
 142 }
 143
 144 void Compiler::append_module(Module &mod, DataFile::Collection *res)
 145 {
 146         module->source_map.merge_from(mod.source_map);
 147
 148         vector<Import *> imports = NodeGatherer<Import>().apply(mod.shared);
 149         for(vector<Import *>::iterator i=imports.begin(); i!=imports.end(); ++i)
 150                 import(res, (*i)->module);
 151         NodeRemover().apply(mod.shared, set<Node *>(imports.begin(), imports.end()));
 152
 153         append_stage(mod.shared);
 154         for(list<Stage>::iterator i=mod.stages.begin(); i!=mod.stages.end(); ++i)
 155                 append_stage(*i);
 156 }
 157
 158 void Compiler::append_stage(Stage &stage)
 159 {
 160         Stage *target = 0;
 161         if(stage.type==Stage::SHARED)
 162                 target = &module->shared;
 163         else
 164         {
 165                 list<Stage>::iterator i;
 166                 for(i=module->stages.begin(); (i!=module->stages.end() && i->type<stage.type); ++i) ;
 167                 if(i==module->stages.end() || i->type>stage.type)
 168                 {
 169                         list<Stage>::iterator j = module->stages.insert(i, stage.type);
 170                         if(i!=module->stages.end())
 171                                 i->previous = &*j;
 172                         i = j;
 173                         if(i!=module->stages.begin())
 174                                 i->previous = &*--j;
 175                 }
 176
 177                 target = &*i;
 178         }
 179
 180         if(stage.required_features.glsl_version>target->required_features.glsl_version)
 181                 target->required_features.glsl_version = stage.required_features.glsl_version;
 182         for(NodeList<Statement>::iterator i=stage.content.body.begin(); i!=stage.content.body.end(); ++i)
 183                 target->content.body.push_back(*i);
 184         DeclarationCombiner().apply(*target);
 185 }
 186
 187 void Compiler::import(DataFile::Collection *resources, const string &name)
 188 {
 189         string fn = name+".glsl";
 190         if(find(imported_names, fn)!=imported_names.end())
 191                 return;
 192         imported_names.push_back(fn);
 193
 194         RefPtr<IO::Seekable> io = (resources ? resources->open_raw(fn) : Resources::get_builtins().open(fn));
 195         if(!io)
 196                 throw runtime_error(format("module %s not found", name));
 197         Parser import_parser;
 198         append_module(import_parser.parse(*io, fn, module->source_map.get_count()), resources);
 199 }
 200
 201 void Compiler::generate(Stage &stage, Mode mode)
 202 {
 203         stage.required_features.gl_api = features.gl_api;
 204         if(module->shared.required_features.glsl_version>stage.required_features.glsl_version)
 205                 stage.required_features.glsl_version = module->shared.required_features.glsl_version;
 206         inject_block(stage.content, module->shared.content);
 207
 208         DeclarationReorderer().apply(stage);
 209         BlockResolver().apply(stage);
 210         FunctionResolver().apply(stage);
 211         VariableResolver().apply(stage);
 212         InterfaceGenerator().apply(stage);
 213         VariableResolver().apply(stage);
 214         DeclarationReorderer().apply(stage);
 215         FunctionResolver().apply(stage);
 216         if(mode==PROGRAM)
 217                 LegacyConverter().apply(stage, features);
 218 }
 219
 220 bool Compiler::optimize(Stage &stage)
 221 {
 222         ConstantConditionEliminator().apply(stage);
 223
 224         FunctionInliner().apply(stage);
 225         BlockResolver().apply(stage);
 226         VariableResolver().apply(stage);
 227
 228         bool result = UnusedVariableRemover().apply(stage);
 229         result |= UnusedFunctionRemover().apply(stage);
 230
 231         return result;
 232 }
 233
 234 void Compiler::finalize(Stage &stage, Mode mode)
 235 {
 236         if(get_gl_api()==OPENGL_ES2 && mode==PROGRAM)
 237                 DefaultPrecisionGenerator().apply(stage);
 238         else if(mode==MODULE)
 239                 PrecisionRemover().apply(stage);
 240 }
 241
 242 void Compiler::inject_block(Block &target, const Block &source)
 243 {
 244         NodeList<Statement>::iterator insert_point = target.body.begin();
 245         for(NodeList<Statement>::const_iterator i=source.body.begin(); i!=source.body.end(); ++i)
 246                 target.body.insert(insert_point, (*i)->clone());
 247 }
 248
 249 } // namespace SL
 250 } // namespace GL
 251 } // namespace Msp