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gl_shader_manager: Make use of std::nullopt where applicable 

Prevents the internal buffer in the std::optional from being zeroed out
unnecessarily and instead sets the validity byte only in some
implementations.

While we're at it, we can make use of std::move to eliminate unnecessary
heap reallocations from occurring.
This commit is contained in:
Lioncash 2020-05-04 22:50:01 -04:00
parent 36809b2e2e
commit f2a7fe05c3
1 changed files with 10 additions and 9 deletions
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19
src/video_core/renderer_opengl/gl_shader_manager.cpp
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@ -226,7 +226,7 @@ public:
result = CodeGenerator(config, separable);
cached_shader.Create(result->code.c_str(), ShaderType);
}
return {cached_shader.GetHandle(), result};
return {cached_shader.GetHandle(), std::move(result)};
}
void Inject(const KeyConfigType& key, OGLProgram&& program) {
@ -260,7 +260,7 @@ public:
auto program_opt = CodeGenerator(setup, key, separable);
if (!program_opt) {
shader_map[key] = nullptr;
return {0, {}};
return {0, std::nullopt};
}
std::string& program = program_opt->code;
@ -271,14 +271,14 @@ public:
cached_shader.Create(program.c_str(), ShaderType);
}
shader_map[key] = &cached_shader;
return {cached_shader.GetHandle(), result};
return {cached_shader.GetHandle(), std::move(result)};
}
if (map_it->second == nullptr) {
return {0, {}};
return {0, std::nullopt};
}
return {map_it->second->GetHandle(), {}};
return {map_it->second->GetHandle(), std::nullopt};
}
void Inject(const KeyConfigType& key, std::string decomp, OGLProgram&& program) {
@ -371,8 +371,9 @@ bool ShaderProgramManager::UseProgrammableVertexShader(const Pica::Regs& regs,
ProgramCode program_code{setup.program_code.begin(), setup.program_code.end()};
program_code.insert(program_code.end(), setup.swizzle_data.begin(),
setup.swizzle_data.end());
u64 unique_identifier = GetUniqueIdentifier(regs, program_code);
ShaderDiskCacheRaw raw{unique_identifier, ProgramType::VS, regs, program_code};
const u64 unique_identifier = GetUniqueIdentifier(regs, program_code);
const ShaderDiskCacheRaw raw{unique_identifier, ProgramType::VS, regs,
std::move(program_code)};
disk_cache.SaveRaw(raw);
}
return true;
@ -573,14 +574,14 @@ void ShaderProgramManager::LoadDiskCache(const std::atomic_bool& stop_loading,
std::scoped_lock lock(mutex);
auto [h, r] = impl->programmable_vertex_shaders.Get(conf, setup);
handle = h;
result = r;
result = std::move(r);
sanitize_mul = conf.state.sanitize_mul;
} else if (raw.GetProgramType() == ProgramType::FS) {
PicaFSConfig conf = PicaFSConfig::BuildFromRegs(raw.GetRawShaderConfig());
std::scoped_lock lock(mutex);
auto [h, r] = impl->fragment_shaders.Get(conf);
handle = h;
result = r;
result = std::move(r);
} else {
// Unsupported shader type got stored somehow so nuke the cache
LOG_ERROR(Frontend, "failed to load raw programtype {}",