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https://github.com/RGBCube/serenity
synced 2025-07-28 04:57:45 +00:00
LibGL+LibGPU+LibSoftGPU: Load SoftGPU driver dynamically
This loads libsoftgpu.so during GLContext creation and instantiates the device class which is then passed into the GLContext constructor.
This commit is contained in:
parent
211d24a218
commit
5bb76e9b63
11 changed files with 165 additions and 9 deletions
8
Userland/Libraries/LibGPU/CMakeLists.txt
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8
Userland/Libraries/LibGPU/CMakeLists.txt
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@ -0,0 +1,8 @@
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set(SOURCES
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Driver.cpp
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)
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serenity_lib(LibGPU gpu)
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target_link_libraries(LibGPU LibCore LibDl)
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add_dependencies(LibGPU LibSoftGPU)
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@ -7,6 +7,7 @@
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#pragma once
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#include <AK/Array.h>
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#include <AK/Error.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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@ -28,6 +29,7 @@
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#include <LibGfx/Matrix3x3.h>
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#include <LibGfx/Matrix4x4.h>
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#include <LibGfx/Rect.h>
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#include <LibGfx/Size.h>
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#include <LibGfx/Vector4.h>
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namespace GPU {
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@ -66,3 +68,7 @@ public:
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};
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}
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typedef GPU::Device* (*serenity_gpu_create_device_t)(Gfx::IntSize const& size);
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extern "C" GPU::Device* serenity_gpu_create_device(Gfx::IntSize const& size);
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76
Userland/Libraries/LibGPU/Driver.cpp
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76
Userland/Libraries/LibGPU/Driver.cpp
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@ -0,0 +1,76 @@
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/*
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* Copyright (c) 2022, Stephan Unverwerth <s.unverwerth@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/HashMap.h>
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#include <AK/String.h>
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#include <AK/WeakPtr.h>
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#ifdef __serenity__
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# include <LibDl/dlfcn.h>
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#else
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# include <dlfcn.h>
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#endif
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#include <LibGPU/Driver.h>
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namespace GPU {
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// FIXME: Think of a better way to configure these paths. Maybe use ConfigServer?
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static HashMap<String, String> const s_driver_path_map
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{
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#if defined(__serenity__)
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{ "softgpu", "/usr/lib/libsoftgpu.so" },
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#elif defined(__APPLE__)
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{ "softgpu", "./liblagom-softgpu.dylib" },
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#else
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{ "softgpu", "./liblagom-softgpu.so" },
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#endif
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};
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static HashMap<String, WeakPtr<Driver>> s_loaded_drivers;
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ErrorOr<NonnullRefPtr<Driver>> Driver::try_create(StringView driver_name)
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{
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// Check if the library for this driver is already loaded
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auto already_loaded_driver = s_loaded_drivers.find(driver_name);
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if (already_loaded_driver != s_loaded_drivers.end() && !already_loaded_driver->value.is_null())
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return *already_loaded_driver->value;
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// Nope, we need to load the library
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auto it = s_driver_path_map.find(driver_name);
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if (it == s_driver_path_map.end())
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return Error::from_string_literal("The requested GPU driver was not found in the list of allowed driver libraries");
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auto lib = dlopen(it->value.characters(), RTLD_NOW);
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if (!lib)
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return Error::from_string_literal("The library for the requested GPU driver could not be opened");
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auto serenity_gpu_create_device = reinterpret_cast<serenity_gpu_create_device_t>(dlsym(lib, "serenity_gpu_create_device"));
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if (!serenity_gpu_create_device) {
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dlclose(lib);
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return Error::from_string_literal("The library for the requested GPU driver does not contain serenity_gpu_create_device()");
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}
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auto driver = adopt_ref(*new Driver(lib, serenity_gpu_create_device));
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s_loaded_drivers.set(driver_name, driver->make_weak_ptr());
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return driver;
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}
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Driver::~Driver()
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{
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dlclose(m_dlopen_result);
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}
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ErrorOr<NonnullOwnPtr<Device>> Driver::try_create_device(Gfx::IntSize size)
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{
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auto device_or_null = m_serenity_gpu_create_device(size);
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if (!device_or_null)
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return Error::from_string_literal("Could not create GPU device");
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return adopt_own(*device_or_null);
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}
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}
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42
Userland/Libraries/LibGPU/Driver.h
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42
Userland/Libraries/LibGPU/Driver.h
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/*
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* Copyright (c) 2022, Stephan Unverwerth <s.unverwerth@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Error.h>
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#include <AK/NonnullOwnPtr.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/RefCounted.h>
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#include <AK/StringView.h>
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#include <AK/Weakable.h>
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#include <LibGPU/Device.h>
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#include <LibGfx/Size.h>
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namespace GPU {
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class Driver final
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: public RefCounted<Driver>
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, public Weakable<Driver> {
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public:
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static ErrorOr<NonnullRefPtr<Driver>> try_create(StringView driver_name);
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~Driver();
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ErrorOr<NonnullOwnPtr<Device>> try_create_device(Gfx::IntSize size);
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private:
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Driver(void* dlopen_result, serenity_gpu_create_device_t device_creation_function)
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: m_dlopen_result { dlopen_result }
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, m_serenity_gpu_create_device { device_creation_function }
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{
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VERIFY(dlopen_result);
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VERIFY(device_creation_function);
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}
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void* const m_dlopen_result { nullptr };
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serenity_gpu_create_device_t m_serenity_gpu_create_device { nullptr };
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};
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}
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