ThreadPool::ThreadPool(size_t num_threads)
{
CHECK_NE_F(num_threads, 0u);
for (size_t i = 0; i < num_threads; ++i) {
_threads.emplace_back([=](){ _thread_worker(i); });
}
}
MemMap::MemMap(const char* path)
{
auto file = open(path, O_RDONLY);
struct stat file_status;
auto ret = fstat(file, &file_status);
if (ret != 0) {
throw std::runtime_error(
(std::string)"Failed to stat file '" + path + "' - maybe it's not there?");
}
_size = (size_t)file_status.st_size;
_data = mmap(0, _size, PROT_READ, MAP_PRIVATE, file, 0);
CHECK_NE_F(_data, MAP_FAILED);
// Note this will not close the file/mapping right now, as it will be held until unmapped.
close(file);
}
Program::Program(const std::string& vs, const std::string& fs, const std::string& debug_name)
: _debug_name(debug_name)
{
VLOG_SCOPE_F(1, "Compiling GLSL %s", debug_name.c_str());
CHECK_FOR_GL_ERROR;
GLuint vs_id = load_shader(GL_VERTEX_SHADER, vs.c_str(), debug_name.c_str());
GLuint fs_id = load_shader(GL_FRAGMENT_SHADER, fs.c_str(), debug_name.c_str());
_program = glCreateProgram();
#if TARGET_OS_IPHONE
// For debugger:
glLabelObjectEXT(GL_PROGRAM_OBJECT_EXT, _program, 0, debug_name.c_str());
#endif
glAttachShader(_program, vs_id);
glAttachShader(_program, fs_id);
//GLuint color_number = 0;
//glBindFragDataLocation(_program, color_number, "out_frag_color");
link_program(_program, debug_name.c_str());
/* too early to validate: uniforms haven't been bound yet.
Using two samplers of different type (sampler2D and sampler_cube)
will break the validation.
*/
//validate();
CHECK_FOR_GL_ERROR;
//debug_print();
#if 0
LOG_F(INFO, "Shader: %s", debug_name.c_str());
LOG_F(INFO, "-------------------------------------");
LOG_F(INFO, "%s", vs.c_str());
LOG_F(INFO, "-------------------------------------");
LOG_F(INFO, "%s", fs.c_str());
LOG_F(INFO, "-------------------------------------");
#endif
GLint num_attribs;
glGetProgramiv(_program, GL_ACTIVE_ATTRIBUTES, &num_attribs);
for (int i=0; i<num_attribs; ++i) {
GLint size;
GLenum type;
GLchar name[1024];
glGetActiveAttrib(_program, i, sizeof(name), NULL, &size, &type, name);
int location = glGetAttribLocation(_program, name);
CHECK_NE_F(location, -1, "Attribute '%s' not found in shader '%s'", name, _debug_name.c_str());
VLOG_F(1, "Attribute %d: %10s, %d x %s, location: %d", i, name, size, type_to_string(type), location);
_attributes.emplace_back(Attribute{name, size, type, location});
}
GLint num_uniforms;
glGetProgramiv(_program, GL_ACTIVE_UNIFORMS, &num_uniforms);
for (int i=0; i<num_uniforms; ++i) {
GLint size;
GLenum type;
GLchar name[1024];
glGetActiveUniform(_program, i, sizeof(name), NULL, &size, &type, name);
int location = glGetUniformLocation(_program, name);
CHECK_NE_F(location, -1, "Uniform '%s' not found in shader '%s'", name, _debug_name.c_str());
VLOG_F(1, "Uniform %d: %10s, %d x %s, location: %d", i, name, size, type_to_string(type), location);
_uniforms.emplace_back(Uniform{name, size, type, location});
}
}