void Flt2Scene::AddShader()
{
//добавить шейдер в сцену
osg::StateSet* ss = _rootNode->getOrCreateStateSet();
//создать экземпл¤р программы
osg::Program* program = new osg::Program;
program->setName( "microshader" );
osg::Shader *VertObj = new osg::Shader( osg::Shader::VERTEX );
osg::Shader *FragObj = new osg::Shader( osg::Shader::FRAGMENT );
program->addShader( VertObj );
program->addShader( FragObj );
LoadShaderSource( VertObj , "glsl/simple.vert" );
LoadShaderSource( FragObj , "glsl/simple.frag" );
ss->setAttributeAndModes( program, osg::StateAttribute::ON );
//создание параметра дл¤ передачи в шейдер
osg::Uniform *_color = new osg::Uniform( "_ZZ3SconstantColor" , osg::Vec3( 1.0f, 0.0f, 1.0f));
//задание callback'a дл¤ динамического изменени¤ параметра
//_color->setUpdateCallback( new GL2SceneUniformCallback );
//добавление в состо¤ние сцены
ss->addUniform( _color );
//добавление uniform'ов дл¤ работы с текстурными модул¤ми
ss->addUniform( new osg::Uniform( "u_texture0" , 0 ) );
ss->addUniform( new osg::Uniform( "u_texture1" , 1 ) );
ss->addUniform( new osg::Uniform( "u_texture2" , 2 ) );
ss->addUniform( new osg::Uniform( "u_texture3" , 3 ) );
}
/*!
Constructor
@param shaderStateSet - the OSG stateset that should be affected by this shader
@param shaderName - a string that contains the name of that shader
@param vertexProgram - the vertx shader program file
@param fragProgram - the fragment shader program
*/
GLSL_ShaderLoader::GLSL_ShaderLoader( osg::StateSet* shaderStateSet, std::string shaderName, std::string vertexProgram, std::string fragProgram):
_shaderStateSet(shaderStateSet), _name(shaderName), _vertObjFile(vertexProgram), _fragObjFile(fragProgram)
{
// Creates a shader program object
_shaderProgram = new osg::Program();
// Pass the name to that object
_shaderProgram->setName( shaderName );
// Creates a vertex and a fragment shader operation
_vertObj = new osg::Shader( osg::Shader::VERTEX );
_fragObj = new osg::Shader( osg::Shader::FRAGMENT );
// Add this shader to the program
_shaderProgram->addShader( _fragObj );
_shaderProgram->addShader( _vertObj );
// Load the shader from a shource file.
LoadShaderSource( _vertObj, _vertObjFile );
LoadShaderSource( _fragObj, _fragObjFile );
// Apply the shader program on a stateset
_shaderStateSet->setAttributeAndModes(_shaderProgram, osg::StateAttribute::OFF | osg::StateAttribute::OVERRIDE);
}
void MainNode::AddShader( osg::StateSet* ss )
{
//добавить шейдер в сцену
//создать экземпл¤р программы
osg::Program* program = new osg::Program;
program->setName( "microshader" );
osg::Shader *VertObj = new osg::Shader( osg::Shader::VERTEX );
osg::Shader *FragObj = new osg::Shader( osg::Shader::FRAGMENT );
osg::Shader *GeomObj = new osg::Shader( osg::Shader::GEOMETRY );
//параметры дл¤ вершинного шейдера
program->setParameter( GL_GEOMETRY_VERTICES_OUT_EXT, 6 );
program->setParameter( GL_GEOMETRY_INPUT_TYPE_EXT, GL_TRIANGLES );
program->setParameter( GL_GEOMETRY_OUTPUT_TYPE_EXT, GL_TRIANGLE_STRIP );
program->addShader( VertObj );
program->addShader( GeomObj );
program->addShader( FragObj );
LoadShaderSource( VertObj , "glsl/simple.vert" );
LoadShaderSource( GeomObj , "glsl/simple.geom" );
LoadShaderSource( FragObj , "glsl/simple.frag" );
ss->setAttributeAndModes( program , osg::StateAttribute::ON );
}
GLuint CreateShader(GLenum type, const char* filename) {
GLuint shader = glCreateShader(type);
char* src;
unsigned long srcLen;
LoadShaderSource(filename, &src, &srcLen);
GLint logLength;
GLint compileStatus;
glShaderSource(shader, 1, &src, NULL);
glCompileShader(shader);
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &logLength);
if (logLength > 0) {
GLchar* log = (GLchar*)malloc(sizeof(GLchar) * logLength);
glGetShaderInfoLog(shader, logLength, &logLength, log);
std::cout << "Shader Info Log from " << filename << ": "<< std::endl;
std::cout << log << std::endl;
free(log);
}
glGetShaderiv(shader, GL_COMPILE_STATUS, &compileStatus);
assert(compileStatus);
FreeShaderSource(&src);
return shader;
}
OGL4ShaderPtr OGL4ShaderCompiler::CreateShaderFromFile(SHADER_TYPE type, const boost::filesystem::path& path, const std::string& entry)
{
std::string source = LoadShaderSource(path.string());
if(source == "")
{
return OGL4ShaderPtr();
}
std::vector<IncludeInfo> inc_list;
IncludeInfo inc;
inc.file = path;
inc.lines = GetSourceLines(source);
inc_list.push_back(inc);
source = ProcessInclude(path.parent_path(), source, inc_list);
inc_list.push_back(inc);
inc_list.erase(inc_list.begin());
source = ClearVersionComment(source);
return CreateShaderFromSource(type, source, inc_list, entry);
}
ShaderProgram::Shader* ResourceManager::LoadShader(std::string path)
{
ShaderProgram::Shader* shader = LoadShaderSource(path);
CompileShader(shader);
return shader;
}
bool ShaderProgram::CompileShaderFromFile(const std::string &path, ShaderType type)
{
GLchar* source = LoadShaderSource(path);
bool ret = false;
if(source != NULL){
ret = CompileShaderFromSource(source, type);
delete[] source;
}else{
DEBUG_MESSAGE("Could not load shader source.");
}
return ret;
}
GLuint LoadShader(const char* filename, bool type)
{
GLuint shader;
char* src;
GLint Status;
char* log;
GLsizei logsize;
logsize = 0;
Status = GL_TRUE;
src = NULL;
if (type)
shader = glCreateShader(GL_VERTEX_SHADER);
else
shader = glCreateShader(GL_FRAGMENT_SHADER);
if (!glIsShader(shader))
{
std::cout<<"error of creation shader"<<std::endl;
return (0);
}
src = LoadShaderSource(filename);
if (src == NULL)
{
glDeleteShader(shader);
return (0);
}
glShaderSource(shader, 1, (const GLchar**)&src, NULL);
glCompileShader(shader);
free (src);
src = NULL;
glGetShaderiv(shader, GL_COMPILE_STATUS, &Status);
if (Status != GL_TRUE)
{
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &logsize);
log = (char*) malloc(logsize + 1);
if (log == NULL)
{
std::cout<<"error of allocation"<<std::endl;
return (0);
}
memset(log, '\0', logsize + 1);
glGetShaderInfoLog(shader, logsize, &logsize, log);
std::cout<<"error of compilation in the shader "<<filename<<std::endl;
std::cout<<"error is "<<log<<std::endl;
free (log);
glDeleteShader(shader);
return (0);
}
return (shader);
}
bool Shader::Load(const char* in_vert, const char* in_frag)
{
if(program != 0)
return false;
std::string source;
LoadShaderSource(in_vert, source);
vert = CreateShader(source, GL_VERTEX_SHADER, in_vert);
source = "";
LoadShaderSource(in_frag, source);
frag = CreateShader(source, GL_FRAGMENT_SHADER, in_frag);
program = glCreateProgram();
glAttachShader(program, vert);
glAttachShader(program, frag);
glBindFragDataLocation(program, 0, "Color");
glBindFragDataLocation(program, 1, "Normal");
glLinkProgram(program);
glUseProgram(program);
return true;
}
void TerrainShaderPatchNode::AddShader()
{
//добавить шейдер
//формирование сцены с шейдером
osg::StateSet* ss = m_rootNode->getOrCreateStateSet();
//создать экземпл¤р программы
osg::Program* program = new osg::Program;
program->setName( "only_geom" );
osg::Shader *VertObj = new osg::Shader( osg::Shader::VERTEX );
osg::Shader *FragObj = new osg::Shader( osg::Shader::FRAGMENT );
program->addShader( VertObj );
program->addShader( FragObj );
LoadShaderSource( VertObj , "glsl/only_geom.vert" );
LoadShaderSource( FragObj , "glsl/only_geom.frag" );
ss->setAttributeAndModes( program, osg::StateAttribute::ON );
//настроить uniform'ы
SetupUniforms( ss );
}
std::string OGL4ShaderCompiler::ProcessInclude(const boost::filesystem::path& basePath, const std::string& source, std::vector<IncludeInfo>& inc_list)
{
std::vector<IncludeInfo> include_list = ExtractIncludeList(source);
if(include_list.size() == 0)
{
return source;
}
std::string ret = "";
for(size_t i = 0; i < include_list.size(); ++i)
{
bool included = false;
for(auto v : inc_list)
{
if((basePath / v.file) == (basePath / include_list[i].file))
{
included = true;
break;
}
}
if(included)
{
continue;
}
std::string inc_source = LoadShaderSource(basePath / include_list[i].file);
include_list[i].lines = GetSourceLines(inc_source);
ret += ProcessInclude(basePath, inc_source, inc_list) + "\n";
inc_list.push_back(include_list[i]);
}
ret += source;
return ret;
}
void Shader::CreateShaderFromFile(std::string const & fileName) {
LoadShaderSource(fileName);
m_shader = CreateShader();
CompileShader();
}
void moShaderGLSL::LoadVertShader(moText vert_filename)
{
moText vert_source = LoadShaderSource(vert_filename);
CreateVertShader(vert_source);
}
void moShaderGLSL::LoadShader(moText vert_filename, moText frag_filename)
{
moText vert_source = LoadShaderSource(vert_filename);
moText frag_source = LoadShaderSource(frag_filename);
CreateShader(vert_source, frag_source);
}
void moShaderGLSL::LoadFragShader(moText frag_filename)
{
moText frag_source = LoadShaderSource(frag_filename);
CreateFragShader(frag_source);
}
bool InitializeShader(Shader_T *s, const char *vsfile, const char *fsfile)
{
bool success = true;
GLuint vertexShader;
GLuint fragmentShader;
GLint vShaderCompiled = GL_FALSE;
GLint fShaderCompiled = GL_FALSE;
GLint programSuccess = GL_TRUE;
GLchar *txt;
unsigned long len;
//Generate program
s->id = glCreateProgram();
s->vertex_attrib = -1;
s->uv_attrib = -1;
//Create vertex shader
vertexShader = glCreateShader( GL_VERTEX_SHADER );
//Set vertex source
LoadShaderSource(vsfile, &txt, &len);
glShaderSource( vertexShader, 1, &txt, NULL );
//Compile vertex source
glCompileShader( vertexShader );
ValidateShader(vertexShader, vsfile);
UnloadShaderSource(&txt);
//Check vertex shader for errors
glGetShaderiv( vertexShader, GL_COMPILE_STATUS, &vShaderCompiled );
if( vShaderCompiled != GL_TRUE )
{
printf( "Unable to compile vertex shader %d!\n", vertexShader );
printShaderLog( vertexShader );
success = false;
}
else
{
//Attach vertex shader to program
glAttachShader( s->id, vertexShader );
//Create fragment shader
LoadShaderSource(fsfile, &txt, &len);
fragmentShader = glCreateShader( GL_FRAGMENT_SHADER );
//Set fragment source
glShaderSource( fragmentShader, 1, &txt, NULL );
//Compile fragment source
glCompileShader( fragmentShader );
ValidateShader(fragmentShader, fsfile);
UnloadShaderSource(&txt);
//Check fragment shader for errors
glGetShaderiv( fragmentShader, GL_COMPILE_STATUS, &fShaderCompiled );
if( fShaderCompiled != GL_TRUE )
{
printf( "Unable to compile fragment shader %d!\n", fragmentShader );
printShaderLog( fragmentShader );
success = false;
}
else
{
//Attach fragment shader to program
glAttachShader( s->id, fragmentShader );
//Link program
glLinkProgram( s->id );
//Check for errors
glGetProgramiv( s->id, GL_LINK_STATUS, &programSuccess );
if( programSuccess != GL_TRUE )
{
printf( "Error linking program %d!\n", s->id );
printProgramLog( s->id );
success = false;
}
else
{
//Get vertex attribute location
s->uv_attrib = glGetAttribLocation( s->id, "vertexUV" );
s->vertex_attrib = glGetAttribLocation( s->id, "vertexPosition" );
if( s->vertex_attrib == -1 )
{
printf( "vertexPosition is not a valid glsl program variable!\n" );
success = false;
}
if(s->uv_attrib == -1 )
{
printf( "vertexTex is not a valid glsl program variable!\n" );
success = false;
}
}
}
}
return success;
}
void MaterialShaderEquation::SetSourceName(const std::string& name) {
m_source = LoadShaderSource(name);
}
