enable DXIL compilation for DX12 backend#167
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решение проблем:
#166
суть:
устанавливаем переменную окружения GOGPU_DX12_DXIL=1 при выборе DX12
Проблема: при старте с DX12 каждый шейдер компилируется через d3dcompiler_47.dll (внешний компилятор Microsoft). Это даёт +2-6 секунд холодного старта.
Решение: GOGPU_DX12_DXIL=1 заменяет внешний d3dcompiler на встроенный компилятор naga — результат тот же DXIL байткод, но без лишней DLL.
Почему FPS не просядет:
Компиляция шейдеров происходит один раз при создании пайплайна, а не каждый кадр
На выходе оба пути дают идентичные D3D12 пайплайны — исполнение на GPU одинаковое
Для файлового менеджера (рендер текста и простых прямоугольников) разница в производительности отсутствует
Переключает только DX12 путь; Vulkan/GLES не затрагивает