diff options
Diffstat (limited to 'game/client/program.cc')
| -rw-r--r-- | game/client/program.cc | 226 |
1 files changed, 0 insertions, 226 deletions
diff --git a/game/client/program.cc b/game/client/program.cc deleted file mode 100644 index 6a2dfa0..0000000 --- a/game/client/program.cc +++ /dev/null @@ -1,226 +0,0 @@ -#include "client/pch.hh"
-
-#include "client/program.hh"
-
-#include "core/io/physfs.hh"
-
-#include "core/utils/string.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(std::string_view source, std::vector<std::string>& out_lines, std::vector<GL_VariedMacro>& out_variants)
-{
- std::string line;
- std::istringstream stream = std::istringstream(std::string(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(std::string_view 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(std::string_view vpath, std::string_view fpath)
-{
- destroy();
-
- vert_path = std::string(vpath);
- frag_path = std::string(fpath);
-
- auto vfile = PHYSFS_openRead(vert_path.c_str());
-
- if(vfile == nullptr) {
- spdlog::warn("gl_program: {}: {}", vpath, io::physfs_error());
- 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(frag_path.c_str());
-
- if(ffile == nullptr) {
- spdlog::warn("gl_program: {}: {}", fpath, io::physfs_error());
- 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);
-
- std::string vsource(utils::join(vert_source, "\r\n"));
- std::string fsource(utils::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(std::string_view name)
-{
- for(std::size_t i = 0; i < uniforms.size(); ++i) {
- if(0 == 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;
- }
- }
-}
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