diff options
Diffstat (limited to 'game/client/program.cc')
| -rw-r--r-- | game/client/program.cc | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/game/client/program.cc b/game/client/program.cc deleted file mode 100644 index 8d4403a..0000000 --- a/game/client/program.cc +++ /dev/null @@ -1,223 +0,0 @@ -#include "client/pch.hh" - -#include "client/program.hh" - -#include "core/strtools.hh" - -// This fills up the array of source lines and figures out -// which lines are to be dynamically resolved as variant macros -static void parse_source(const char* source, std::vector<std::string>& out_lines, std::vector<GL_VariedMacro>& out_variants) -{ - std::string line; - std::istringstream stream = std::istringstream(source); - unsigned long line_number = 0UL; - - out_lines.clear(); - out_variants.clear(); - - while(std::getline(stream, line)) { - unsigned int macro_index = {}; - char macro_name[128] = {}; - - if(std::sscanf(line.c_str(), " # pragma variant [ %u ] %127[^, \"\t\r\n]", ¯o_index, ¯o_name) == 2) { - if(out_variants.size() <= macro_index) { - out_variants.resize(macro_index + 1U); - } - - out_variants[macro_index].name = macro_name; - out_variants[macro_index].line = line_number; - out_variants[macro_index].value = std::numeric_limits<unsigned int>::max(); - - out_lines.push_back(std::string()); - line_number += 1UL; - } else { - out_lines.push_back(line); - line_number += 1UL; - } - } -} - -static GLuint compile_shader(const char* path, const char* source, GLenum shader_stage) -{ - GLuint shader = glCreateShader(shader_stage); - glShaderSource(shader, 1, &source, nullptr); - glCompileShader(shader); - - GLint info_log_length; - glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &info_log_length); - - if(info_log_length >= 2) { - std::basic_string<GLchar> info_log; - info_log.resize(info_log_length); - glGetShaderInfoLog(shader, info_log_length, nullptr, info_log.data()); - spdlog::info("gl_program: {}: shader information:", path); - spdlog::info(info_log); - } - - GLint compile_status; - glGetShaderiv(shader, GL_COMPILE_STATUS, &compile_status); - - if(!compile_status) { - glDeleteShader(shader); - return 0; - } - - return shader; -} - -bool GL_Program::setup(const char* vpath, const char* fpath) -{ - destroy(); - - vert_path = std::string(vpath); - frag_path = std::string(fpath); - - auto vfile = PHYSFS_openRead(vpath); - - if(vfile == nullptr) { - spdlog::warn("gl_program: {}: {}", vpath, PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode())); - return false; - } - - auto vsource = std::string(PHYSFS_fileLength(vfile), char(0x00)); - PHYSFS_readBytes(vfile, vsource.data(), vsource.size()); - PHYSFS_close(vfile); - - auto ffile = PHYSFS_openRead(fpath); - - if(ffile == nullptr) { - spdlog::warn("gl_program: {}: {}", fpath, PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode())); - return false; - } - - auto fsource = std::string(PHYSFS_fileLength(ffile), char(0x00)); - PHYSFS_readBytes(ffile, fsource.data(), fsource.size()); - PHYSFS_close(ffile); - - parse_source(vsource.c_str(), vert_source, vert_variants); - parse_source(fsource.c_str(), frag_source, frag_variants); - - needs_update = true; - handle = 0; - - return true; -} - -bool GL_Program::update(void) -{ - if(!needs_update) { - // The program is already up to - // date with the internal state - return true; - } - - for(const auto& macro : vert_variants) - vert_source[macro.line] = std::format("#define {} {}", macro.name, macro.value); - for(const auto& macro : frag_variants) - frag_source[macro.line] = std::format("#define {} {}", macro.name, macro.value); - - const std::string vsource = strtools::join(vert_source, "\r\n"); - const std::string fsource = strtools::join(frag_source, "\r\n"); - - GLuint vert = compile_shader(vert_path.c_str(), vsource.c_str(), GL_VERTEX_SHADER); - GLuint frag = compile_shader(frag_path.c_str(), fsource.c_str(), GL_FRAGMENT_SHADER); - - if(!vert || !frag) { - // needs_update = false; - glDeleteShader(frag); - glDeleteShader(vert); - return false; - } - - handle = glCreateProgram(); - glAttachShader(handle, vert); - glAttachShader(handle, frag); - glLinkProgram(handle); - - GLint info_log_length; - glGetProgramiv(handle, GL_INFO_LOG_LENGTH, &info_log_length); - - if(info_log_length >= 2) { - std::basic_string<GLchar> info_log; - info_log.resize(info_log_length); - glGetProgramInfoLog(handle, info_log_length, nullptr, info_log.data()); - spdlog::info("gl_program: [{}; {}]: program information", vert, frag); - spdlog::info(info_log); - } - - glDeleteShader(frag); - glDeleteShader(vert); - - GLint link_status; - glGetProgramiv(handle, GL_LINK_STATUS, &link_status); - - if(!link_status) { - // needs_update = false; - glDeleteProgram(handle); - return false; - } - - for(auto& uniform : uniforms) { - // NOTE: GL seems to silently ignore invalid uniform - // locations (-1); should we write something into logs about this? - uniform.location = glGetUniformLocation(handle, uniform.name.c_str()); - } - - needs_update = false; - return true; -} - -void GL_Program::destroy(void) -{ - if(handle) { - glDeleteProgram(handle); - handle = 0; - } - - uniforms.clear(); - - frag_variants.clear(); - frag_source.clear(); - frag_path = std::string(); - - vert_variants.clear(); - vert_source.clear(); - vert_path = std::string(); - - needs_update = false; -} - -std::size_t GL_Program::add_uniform(const char* name) -{ - for(std::size_t i = 0; i < uniforms.size(); ++i) { - if(!uniforms[i].name.compare(name)) { - return i; - } - } - - const std::size_t index = uniforms.size(); - uniforms.push_back(GL_Uniform()); - uniforms[index].location = -1; - uniforms[index].name = name; - return index; -} - -void GL_Program::set_variant_vert(unsigned int variant, unsigned int value) -{ - if(variant < vert_variants.size()) { - if(value != vert_variants[variant].value) { - vert_variants[variant].value = value; - needs_update = true; - } - } -} - -void GL_Program::set_variant_frag(unsigned int variant, unsigned int value) -{ - if(variant < frag_variants.size()) { - if(value != frag_variants[variant].value) { - frag_variants[variant].value = value; - needs_update = true; - } - } -} |