demotool/shaders.cc

1016 lines
24 KiB
C++

#include "externals.hh"
#include "shaders.hh"
#include "globals.hh"
namespace {
const std::regex PreprocDirective_( "^\\s*//!\\s*([a-z]+(\\s+([^\\s]+))*)\\s*$" );
const std::regex UniformName_( "^[A-Za-z][A-Za-z0-9_]*$" );
const std::regex GLSLErrorNv_( "^[0-9]*\\(([0-9]+).*$" );
const std::map< std::string , E_ShaderInput > InputTypes_( ([] {
std::map< std::string , E_ShaderInput > t;
t.emplace( "chunk" , E_ShaderInput::CHUNK );
t.emplace( "library" , E_ShaderInput::LIBRARY );
t.emplace( "lib" , E_ShaderInput::LIBRARY );
t.emplace( "vertex" , E_ShaderInput::VERTEX );
t.emplace( "fragment" , E_ShaderInput::FRAGMENT );
t.emplace( "compute" , E_ShaderInput::COMPUTE );
t.emplace( "geo" , E_ShaderInput::GEOMETRY );
t.emplace( "geometry" , E_ShaderInput::GEOMETRY );
return t;
})());
const std::unordered_map< std::string , E_UniformType > UniformTypes_( ([] {
std::unordered_map< std::string , E_UniformType > t;
t.emplace( "float" , E_UniformType::F1 );
t.emplace( "vec2" , E_UniformType::F2 );
t.emplace( "vec3" , E_UniformType::F3 );
t.emplace( "vec4" , E_UniformType::F4 );
t.emplace( "int" , E_UniformType::I1 );
t.emplace( "ivec2" , E_UniformType::I2 );
t.emplace( "ivec3" , E_UniformType::I3 );
t.emplace( "ivec4" , E_UniformType::I4 );
t.emplace( "sampler2D" , E_UniformType::SAMPLER2D );
return t;
})());
const GLenum ProgramTypes_[] = {
GL_VERTEX_SHADER ,
GL_FRAGMENT_SHADER ,
GL_GEOMETRY_SHADER ,
GL_COMPUTE_SHADER
};
const GLbitfield PipelineStages_[] = {
GL_VERTEX_SHADER_BIT ,
GL_FRAGMENT_SHADER_BIT ,
GL_GEOMETRY_SHADER_BIT ,
GL_COMPUTE_SHADER_BIT
};
static_assert( sizeof( PipelineStages_ ) / sizeof( GLbitfield ) == size_t( E_ShaderType::__COUNT__ ) ,
"missing pipeline stage constants" );
/*============================================================================*/
// Input reader state and functions, used when loading a source file
struct T_InputReader_
{
using T_Tokens_ = std::vector< std::string >;
FILE* const file;
T_ShaderInput& input;
uint32_t line{ 0 };
char* buffer{ nullptr };
ssize_t readCount;
std::string accumulator{ };
uint32_t accumLines{ 0 };
T_InputReader_( FILE* const file ,
T_ShaderInput& input )
: file( file ) , input( input )
{ }
~T_InputReader_( );
void read( );
void handleDirective(
T_Tokens_ const& tokens );
void parseInputDirective(
T_Tokens_ const& tokens );
void error(
std::string const& err );
void nl( );
void addAccumulated( );
};
/*----------------------------------------------------------------------------*/
T_InputReader_::~T_InputReader_( )
{
if ( buffer ) {
free( buffer );
}
fclose( file );
}
void T_InputReader_::read( )
{
size_t bsz( 0 );
while ( ( readCount = getline( &buffer , &bsz , file ) ) != -1 ) {
line ++;
std::cmatch match;
if ( std::regex_match( buffer , match , PreprocDirective_ ) ) {
const T_Tokens_ tokens( ([](std::string const& a) {
using stri = std::istream_iterator< std::string >;
std::istringstream iss( a );
return T_Tokens_{ stri( iss ) , stri( ) };
})( match[ 1 ].str( ) ) );
assert( tokens.size( ) >= 1 );
handleDirective( tokens );
} else {
accumulator += buffer;
accumLines ++;
}
}
addAccumulated( );
}
/*----------------------------------------------------------------------------*/
void T_InputReader_::handleDirective(
T_Tokens_ const& tokens )
{
auto const& directive( tokens[ 0 ] );
if ( directive == "include" ) {
if ( tokens.size( ) != 2 ) {
nl( );
error( "invalid arguments" );
return;
}
addAccumulated( );
auto& ck( input.chunks );
ck.emplace_back( E_ShaderInputChunk::INCLUDE , tokens[ 1 ] , 1 );
} else if ( directive == "type" ) {
nl( );
if ( tokens.size( ) != 2 ) {
error( "invalid arguments" );
return;
}
auto pos( InputTypes_.find( tokens[ 1 ] ) );
if ( pos == InputTypes_.end( ) ) {
error( "unknown type" );
} else {
input.type = pos->second;
}
} else if ( directive == "input" ) {
nl( );
parseInputDirective( tokens );
} else if ( directive == "uniforms" ) {
nl( );
for ( auto const& c : input.chunks ) {
if ( c.type == E_ShaderInputChunk::UNIFORMS ) {
error( "duplicate uniform generation" );
return;
}
}
input.chunks.emplace_back( E_ShaderInputChunk::UNIFORMS , "" , 1 );
} else {
nl( );
error( "unknown directive" );
}
}
void T_InputReader_::parseInputDirective(
T_Tokens_ const& tokens )
{
if ( tokens.size( ) != 4 ) {
error( "invalid arguments" );
return;
}
// Local/global
const bool global{ tokens[ 1 ] == "global" };
if ( !global && tokens[ 1 ] != "local" ) {
error( "second argument should be 'local' or 'global'" );
return;
}
// Name
std::string const& name{ tokens[ 2 ] };
if ( input.uniforms.find( name ) != input.uniforms.end( ) ) {
error( "duplicate uniform" );
return;
}
if ( !std::regex_match( name , UniformName_ ) ) {
error( "invalid uniform name" );
return;
}
// Type
auto tPos( UniformTypes_.find( tokens[ 3 ] ) );
if ( tPos == UniformTypes_.end( ) ) {
error( "unsupported uniform type" );
return;
}
input.uniforms.emplace( tokens[ 2 ] , T_ShaderUniform{
tokens[ 2 ] , global , tPos->second } );
}
/*----------------------------------------------------------------------------*/
void T_InputReader_::error(
std::string const& err )
{
input.errors.push_back( T_ShaderInputError{
line , err } );
}
void T_InputReader_::nl( )
{
accumLines ++;
accumulator += '\n';
}
void T_InputReader_::addAccumulated( )
{
if ( accumLines ) {
auto& ck( input.chunks );
ck.emplace_back( E_ShaderInputChunk::CODE ,
std::move( accumulator ) , accumLines );
accumulator = {};
accumLines = 0;
}
}
} // namespace
/*= T_ShaderInput ============================================================*/
bool T_ShaderInput::load(
std::string const& path )
{
type = E_ShaderInput::CHUNK;
chunks.clear( );
errors.clear( );
FILE* const file{ fopen( path.c_str( ) , "r" ) };
if ( !file ) {
return false;
}
T_InputReader_ reader( file , *this );
reader.read( );
return true;
}
/*= T_ShaderPipeline =========================================================*/
T_ShaderPipeline::T_ShaderPipeline( )
: T_ShaderPipeline( -1 )
{ }
T_ShaderPipeline::T_ShaderPipeline(
T_ShaderPipeline const& other )
: T_ShaderPipeline( other.smIndex_ )
{ }
T_ShaderPipeline::T_ShaderPipeline(
T_ShaderPipeline&& other ) noexcept
: T_ShaderPipeline( )
{
std::swap( other.smIndex_ , smIndex_ );
}
T_ShaderPipeline::T_ShaderPipeline(
const int32_t index )
: smIndex_( index )
{
if ( smIndex_ >= 0 ) {
Globals::Shaders( ).pipelines_[ smIndex_ ].references ++;
}
}
T_ShaderPipeline::~T_ShaderPipeline( )
{
if ( smIndex_ >= 0 ) {
Globals::Shaders( ).dereferencePipeline( smIndex_ );
}
}
T_ShaderPipeline& T_ShaderPipeline::operator=(
T_ShaderPipeline const& other )
{
if ( this != &other ) {
if ( smIndex_ >= 0 ) {
Globals::Shaders( ).dereferencePipeline( smIndex_ );
}
smIndex_ = other.smIndex_;
if ( smIndex_ >= 0 ) {
Globals::Shaders( ).pipelines_[ smIndex_ ].references ++;
}
}
return *this;
}
T_ShaderPipeline& T_ShaderPipeline::operator=(
T_ShaderPipeline&& other ) noexcept
{
if ( this != &other ) {
if ( smIndex_ >= 0 ) {
Globals::Shaders( ).dereferencePipeline( smIndex_ );
}
smIndex_ = other.smIndex_;
other.smIndex_ = -1;
}
return *this;
}
bool T_ShaderPipeline::valid( ) const noexcept
{
return smIndex_ >= 0
&& Globals::Shaders( ).pipelines_[ smIndex_ ].id != 0;
}
void T_ShaderPipeline::enable( ) const
{
if ( valid( ) ) {
glBindProgramPipeline( Globals::Shaders( ).pipelines_[ smIndex_ ].id );
}
}
GLuint T_ShaderPipeline::id( ) const
{
if ( smIndex_ >= 0 ) {
return Globals::Shaders( ).pipelines_[ smIndex_ ].id;
} else {
return 0;
}
}
GLuint T_ShaderPipeline::program(
const E_ShaderType program ) const
{
if ( !valid( ) ) {
return 0;
}
auto const& sm( Globals::Shaders( ) );
auto const& pl( sm.pipelines_[ smIndex_ ] );
for ( auto const& pn : pl.programs ) {
auto pos( sm.programIndex_.find( pn ) );
if ( pos == sm.programIndex_.end( ) ) {
continue;
}
auto& p( sm.programs_[ pos->second ] );
if ( p.code.type == program ) {
return p.id;
}
}
return 0;
}
/*= T_CodeBuilder_ ===========================================================*/
namespace {
using F_GetInput_ = std::function< T_ShaderInput const*( std::string const& ) >;
using T_Code_ = T_ShaderManager::T_ShaderCode;
// Code builder, state and functions
struct T_CodeBuilder_
{
struct T_StackEntry_ {
std::string name;
T_ShaderInput const* input;
uint32_t pos;
};
F_GetInput_ loader;
const std::string name;
T_Code_& code;
T_ShaderInput const* main;
std::map< std::string , uint32_t > pos;
std::vector< T_StackEntry_ > stack;
std::set< std::string > libraries;
T_ShaderInput const* current;
uint32_t cpos{ 0 };
std::string cname;
T_CodeBuilder_( F_GetInput_ loader ,
std::string const& name ,
T_Code_& code )
: loader( loader ) , name( name ) , code( code ) ,
main( loader( name ) )
{ }
bool buildCode( );
void appendChunk( T_ShaderInputChunk const& chunk );
void include( std::string const& name ,
const uint32_t lines );
void next( );
void addInputLoaderErrors(
T_ShaderInput const* input ,
std::string const& name );
};
/*----------------------------------------------------------------------------*/
bool T_CodeBuilder_::buildCode( )
{
code = T_Code_{ };
code.files.emplace( name , main != nullptr );
if ( !main ) {
return false;
}
if ( main->type == E_ShaderInput::CHUNK
|| main->type == E_ShaderInput::LIBRARY ) {
code.errors.push_back( T_ShaderError{
name , 0 , "invalid type" } );
} else {
code.type = E_ShaderType( int( main->type ) - 2 );
}
addInputLoaderErrors( main , name );
cname = name;
current = main;
while ( cpos < current->chunks.size( ) ) {
auto& chunk( current->chunks[ cpos ] );
if ( chunk.type == E_ShaderInputChunk::CODE ) {
appendChunk( chunk );
} else {
include( chunk.text , chunk.lines );
}
next( );
}
return true;
}
void T_CodeBuilder_::appendChunk(
T_ShaderInputChunk const& chunk )
{
code.sources.push_back( cname );
code.counts.push_back( chunk.lines );
code.starts.push_back( pos[ cname ] );
code.code += chunk.text;
pos[ cname ] += chunk.lines;
}
void T_CodeBuilder_::include(
std::string const& nname ,
const uint32_t lines )
{
const auto prevPos( pos[ cname ] );
pos[ cname ] += lines;
// Avoid recursion
if ( cname == nname || 0 != count_if( stack.begin( ) , stack.end( ) ,
[nname] ( T_StackEntry_ const& e ) {
return nname == e.name;
} ) ) {
code.errors.push_back( T_ShaderError{ cname , prevPos ,
"recursive inclusion of '" + nname + "'" } );
return;
}
// Avoid including libraries more than once
if ( libraries.find( nname ) != libraries.end( ) ) {
return;
}
T_ShaderInput const* const isi( loader( nname ) );
code.files.emplace( nname , isi != nullptr );
// Check for problems
if ( !isi ) {
// Not found
code.errors.push_back( T_ShaderError{ cname , prevPos ,
"file not found" } );
return;
}
if ( isi->type != E_ShaderInput::CHUNK && isi->type != E_ShaderInput::LIBRARY ) {
// Trying to load a top-level shader
code.errors.push_back( T_ShaderError{ cname , prevPos ,
"trying to include a top-level file" } );
return;
}
// Add input loader errors
if ( libraries.find( nname ) == libraries.end( ) ) {
addInputLoaderErrors( isi , nname );
}
libraries.insert( nname );
// Enter the new file
stack.push_back( T_StackEntry_{ cname , current , cpos } );
cname = nname;
current = isi;
cpos = UINT32_MAX;
pos[ cname ] = 0;
}
void T_CodeBuilder_::next( )
{
cpos ++;
while ( cpos == current->chunks.size( ) && !stack.empty( ) ) {
T_StackEntry_ const& se( stack[ stack.size( ) - 1 ] );
pos.erase( cname );
cpos = se.pos + 1;
current = se.input;
cname = se.name;
stack.pop_back( );
}
}
void T_CodeBuilder_::addInputLoaderErrors(
T_ShaderInput const* input ,
std::string const& name )
{
for ( auto const& errs : input->errors ) {
code.errors.push_back( T_ShaderError{
name , errs.line , errs.error } );
}
}
} // namespace
/*============================================================================*/
T_ShaderPipeline T_ShaderManager::pipeline(
std::initializer_list< std::string > shaders )
{
if ( shaders.size( ) < 1 || shaders.size( ) > 5 ) {
return {};
}
const std::string id( ([&shaders] () {
std::ostringstream oss;
std::copy( shaders.begin( ) , shaders.end( ) ,
std::ostream_iterator< std::string >( oss , "|" ) );
return oss.str( );
} )() );
auto pos( pipelineIndex_.find( id ) );
if ( pos != pipelineIndex_.end( ) ) {
return T_ShaderPipeline{ int32_t( pos->second ) };
}
const auto index( newPipelineRecord( ) );
auto& p( pipelines_[ index ] );
pipelineIndex_.emplace( id , index );
p.idString = id;
p.id = 0;
p.references = 0;
p.programs = shaders;
for ( auto const& pName : shaders ) {
loadProgram( index , pName );
}
initPipeline( p );
return T_ShaderPipeline{ int32_t( index ) };
}
/*----------------------------------------------------------------------------*/
void T_ShaderManager::update( )
{
inputs_.clear( );
// Check for missing files
for ( auto it = missing_.begin( ) ; it != missing_.end( ) ; ++ it ) {
const bool exists( ([] ( std::string const& name ) -> bool {
struct stat buffer;
return ( stat( name.c_str( ) , &buffer ) == 0 );
})( "shaders/" + (*it).first ) );
if ( !exists ) {
continue;
}
updates_.insert( (*it).second.begin( ) , (*it).second.end( ) );
missing_.erase( (*it).first );
}
// Reset programs that need to be updated
std::set< uint32_t > pipelines;
for ( auto const& name : updates_ ) {
auto p( programIndex_.find( name ) );
if ( p == programIndex_.end( ) ) {
updates_.erase( name );
} else {
auto& pr( programs_[ p->second ] );
pipelines.insert( pr.references.begin( ) , pr.references.end( ) );
resetProgram( pr );
}
}
if ( updates_.empty( ) ) {
return;
}
// Reset pipelines affected by the programs above
for ( auto plid : pipelines ) {
auto& pipeline( pipelines_[ plid ] );
if ( pipeline.id != 0 ) {
glDeleteProgramPipelines( 1 , &pipeline.id );
pipeline.id = 0;
}
}
// Try to load all updated programs
for ( auto const& name : updates_ ) {
auto& pr( programs_[ programIndex_[ name ] ] );
initProgram( pr );
for ( auto const& e : pr.code.errors ) {
printf( "%s:%d: %s\n" , e.source.c_str( ) , e.line ,
e.error.c_str( ) );
}
}
// Try to initialise all affected pipelines
for ( auto plid : pipelines ) {
initPipeline( pipelines_[ plid ] );
}
updates_.clear( );
}
uint32_t T_ShaderManager::newPipelineRecord( )
{
uint32_t i = 0;
while ( i < pipelines_.size( ) ) {
if ( pipelines_[ i ].references == 0 ) {
return i;
}
i ++;
}
pipelines_.emplace_back( );
return i;
}
uint32_t T_ShaderManager::newProgramRecord( )
{
uint32_t i = 0;
while ( i < programs_.size( ) ) {
if ( programs_[ i ].references.empty( ) ) {
return i;
}
i ++;
}
programs_.emplace_back( );
return i;
}
void T_ShaderManager::loadProgram(
const uint32_t pipeline ,
std::string const& name )
{
if ( useExistingProgram( pipeline , name ) ) {
return;
}
const uint32_t index( newProgramRecord( ) );
auto& program( programs_[ index ] );
programIndex_.emplace( name , index );
program.name = name;
program.references.insert( pipeline );
program.id = 0;
initProgram( program );
for ( auto const& e : program.code.errors ) {
printf( "%s:%d: %s\n" , e.source.c_str( ) , e.line , e.error.c_str( ) );
}
}
bool T_ShaderManager::useExistingProgram(
const uint32_t pipeline ,
std::string const& name )
{
auto pos( programIndex_.find( name ) );
if ( pos == programIndex_.end( ) ) {
return false;
}
auto& refs( programs_[ pos->second ].references );
assert( refs.find( pipeline ) == refs.end( ) );
refs.insert( pipeline );
return true;
}
T_ShaderInput const* T_ShaderManager::getInput(
std::string const& name )
{
auto pos( inputs_.find( name ) );
if ( pos != inputs_.end( ) ) {
return pos->second.get( );
}
T_ShaderInput ni;
if ( !ni.load( "shaders/" + name ) ) {
return nullptr;
}
inputs_.emplace( name , std::make_unique< T_ShaderInput >( std::move( ni ) ) );
return inputs_.find( name )->second.get( );
}
void T_ShaderManager::dereferencePipeline(
const uint32_t index )
{
auto& pipeline( pipelines_[ index ] );
assert( pipeline.references > 0 );
pipeline.references --;
if ( pipeline.references > 0 ) {
return;
}
pipelineIndex_.erase( pipeline.idString );
if ( pipeline.id != 0 ) {
glDeleteProgramPipelines( 1 , &pipeline.id );
pipeline.id = 0;
}
for ( auto const& pName : pipeline.programs ) {
auto pos( programIndex_.find( pName ) );
assert( pos != programIndex_.end( ) );
dereferenceProgram( pos->second , index );
}
}
void T_ShaderManager::dereferenceProgram(
const uint32_t index ,
const uint32_t pipeline )
{
auto& program( programs_[ index ] );
auto& refs( program.references );
assert( refs.find( pipeline ) != refs.end( ) );
refs.erase( pipeline );
if ( refs.size( ) != 0 ) {
return;
}
resetProgram( program );
programIndex_.erase( program.name );
}
void T_ShaderManager::initPipeline(
T_Pipeline_& pipeline ) const
{
assert( pipeline.id == 0 );
printf( "init pipeline %s\n" , pipeline.idString.c_str( ) );
constexpr auto nst{ size_t( E_ShaderType::__COUNT__ ) };
int32_t programs[ nst ];
for ( auto i = 0u ; i < nst ; i ++ ) {
programs[ i ] = -1;
}
for ( auto const& pName : pipeline.programs ) {
const uint32_t pid( programIndex_.find( pName )->second );
auto const& program( programs_[ pid ] );
if ( programs[ int( program.code.type ) ] != -1
|| program.id == 0 ) {
printf( "... failed\n" );
return;
}
programs[ int( program.code.type ) ] = pid;
}
GLuint id( 0 );
GL_CHECK( {} );
glGenProgramPipelines( 1 , &id );
GL_CHECK( return );
for ( auto i = 0u ; i < nst ; i ++ ) {
const auto pid( programs[ i ] );
if ( pid == -1 ) {
continue;
}
auto& program( programs_[ pid ] );
const GLbitfield type( PipelineStages_[ int( program.code.type ) ] );
glUseProgramStages( id , type , program.id );
}
GL_CHECK({
glDeleteProgramPipelines( 1 , &id );
printf( "... failed\n" );
return;
});
pipeline.id = id;
printf( "... success\n" );
}
void T_ShaderManager::initProgram(
T_Program_& program )
{
assert( program.id == 0 );
// Build the code
auto name( program.name );
printf( "init program %s\n" , program.name.c_str( ) );
auto& code( program.code );
T_CodeBuilder_ cb( [this]( std::string const& n ) { return getInput( n ); } ,
name , code );
const bool built(
T_CodeBuilder_{
[this]( std::string const& n ) { return getInput( n ); } ,
program.name , code
}.buildCode( ) );
// Initialise file watcher + missing files
program.watch = std::make_unique< T_WatchedFiles >( Globals::Watcher( ) ,
[this,name]() {
programUpdated( name );
} );
for ( auto entry : code.files ) {
if ( entry.second ) {
ebcl::T_StringBuilder sb( "shaders/" );
sb << entry.first.c_str( );
program.watch->watch( std::move( sb ) );
} else {
missing_[ entry.first ].insert( name );
}
}
if ( !( built && code.errors.empty( ) ) ) {
return;
}
// Try to compile the program
char const* const list[] = {
program.code.code.c_str( )
};
const GLenum sid = glCreateShaderProgramv(
ProgramTypes_[ int( code.type ) ] ,
1 , &list[ 0 ] );
if ( sid == 0 ) {
code.errors.push_back( T_ShaderError{
name , 0 , "failed to create GL program" } );
return;
}
// Read and convert the log
int infoLogLength( 0 );
glGetProgramiv( sid , GL_INFO_LOG_LENGTH , &infoLogLength );
if ( infoLogLength ) {
char buffer[ infoLogLength + 1 ];
glGetProgramInfoLog( sid , infoLogLength , nullptr , buffer );
char* start( buffer );
char* found( strchr( buffer , '\n' ) );
while ( found ) {
*found = 0;
parseGLSLError( code , start );
start = found + 1;
found = strchr( start , '\n' );
}
if ( start < &buffer[ infoLogLength - 1 ] ) {
parseGLSLError( code , start );
}
}
// Did it link?
GLint lnk( 0 );
glGetProgramiv( sid , GL_LINK_STATUS , &lnk );
if ( lnk ) {
program.id = sid;
printf( "... success\n" );
} else {
glDeleteProgram( sid );
}
}
void T_ShaderManager::parseGLSLError(
T_ShaderCode& code ,
char const* errorLine )
{
assert( !code.sources.empty( ) );
std::cmatch m;
uint32_t rawLine;
if ( std::regex_match( errorLine , m , GLSLErrorNv_ ) ) {
rawLine = atoi( m[ 1 ].str( ).c_str( ) );
} else {
rawLine = 0;
}
uint32_t check = 0 , pos = 0;
while ( pos < code.starts.size( ) && check < rawLine ) {
check += code.counts[ pos ];
pos ++;
}
code.errors.push_back( T_ShaderError{
pos == 0 ? "*unknown*" : code.sources[ pos - 1 ] ,
pos == 0 ? 0 : ( rawLine + code.counts[ pos - 1 ] - check + code.starts[ pos - 1 ] ) ,
errorLine } );
}
void T_ShaderManager::programUpdated(
std::string const& name )
{
updates_.insert( name );
}
void T_ShaderManager::resetProgram(
T_Program_& program )
{
if ( program.watch ) {
program.watch.reset( );
}
if ( program.id != 0 ) {
glDeleteProgram( program.id );
program.id = 0;
return;
}
for ( auto entry : program.code.files ) {
if ( entry.second || missing_.find( entry.first ) == missing_.end( ) ) {
continue;
}
auto& set( missing_[ entry.first ] );
set.erase( program.name );
if ( set.empty( ) ) {
missing_.erase( entry.first );
}
}
}
/*----------------------------------------------------------------------------*/
void T_ShaderManager::makeUI( )
{
if ( !uiEnabled_ ) {
return;
}
auto const& dspSize( ImGui::GetIO( ).DisplaySize );
ImGui::SetNextWindowSize( ImVec2( dspSize.x , 150 ) ,
ImGuiSetCond_Once );
ImGui::SetNextWindowPos( ImVec2( 0 , dspSize.y - 150 ) ,
ImGuiSetCond_Once );
ImGui::Begin( "Shaders" );
const auto n( std::count_if( programs_.begin( ) , programs_.end( ) ,
[]( auto const& p ) { return !p.references.empty( ); } ) );
std::vector< size_t > indices;
const auto rn = programs_.size( );
for ( auto i = 0u ; i < rn ; i ++ ) {
if ( !programs_[ i ].references.empty( ) ) {
indices.push_back( i );
}
}
std::sort( indices.begin( ) , indices.end( ) ,
[this]( size_t a , size_t b ) {
auto const& pa( programs_[ a ] );
auto const& pb( programs_[ b ] );
if ( pa.code.errors.size( ) != pb.code.errors.size( ) ) {
return pa.code.errors.size( ) > pb.code.errors.size( );
}
if ( pa.references.size( ) != pb.references.size( ) ) {
return pa.references.size( ) > pb.references.size( );
}
return programs_[ a ].name < programs_[ b ].name;
} );
for ( auto i = 0u ; i < n ; i ++ ) {
auto const& program( programs_[ indices[ i ] ] );
const auto nErrors( program.code.errors.size( ) );
const bool open( nErrors
? ImGui::TreeNodeEx( &program , ImGuiTreeNodeFlags_OpenOnArrow
| ImGuiTreeNodeFlags_OpenOnDoubleClick , "%s" ,
program.name.c_str( ) )
: false );
if ( !nErrors ) {
ImGui::Text( "%s" , program.name.c_str( ) );
}
ImGui::SameLine( 400 );
ImGui::Text( "Usage: %zu" , program.references.size( ) );
ImGui::SameLine( 550 );
if ( program.code.errors.empty( ) ) {
ImGui::PushStyleColor( ImGuiCol_Text , ImVec4( .6 , 1 , .6 , 1 ) );
ImGui::Text( "No errors" );
} else {
ImGui::PushStyleColor( ImGuiCol_Text , ImVec4( 1 , .6 , .6 , 1 ) );
ImGui::Text( "%zu error%s" , nErrors , nErrors > 1 ? "s" : "" );
}
ImGui::PopStyleColor( );
if ( open ) {
for ( auto const& err : program.code.errors ) {
ImGui::NewLine( );
ImGui::SameLine( 50 );
ImGui::Text( "%s" , err.source.c_str( ) );
ImGui::SameLine( 250 );
ImGui::Text( "line %d" , err.line );
ImGui::SameLine( 370 );
ImGui::Text( "%s" , err.error.c_str( ) );
}
ImGui::TreePop( );
}
}
ImGui::End( );
}