mirror of
https://github.com/SerenityOS/serenity.git
synced 2026-11-07 04:29:30 -10:00
Sönke Holz
7e510d374a
This initial version of the driver only supports glClear{,Color,Depth}()
for now.
Since the only publicly available documentation for the VideoCore 3D
architecture (the VideoCore IV 3D Architecture Reference Guide) just
covers an older revision of the VideoCore 3D architecture, I used
Mesa's v3d_packet.xml as a reference to get definitions for the control
records of the VideoCore VII.
To determine which control records need to be generated for a minimal
example, I used Mesa's `V3D_DEBUG` environment variable and set it to
`cl` to make it dump the control lists it generates for a basic OpenGL
test program.
74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
/*
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* Copyright (c) 2022, Stephan Unverwerth <[email protected]>
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* Copyright (c) 2023, Jelle Raaijmakers <[email protected]>
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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/WeakPtr.h>
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#include <LibGPU/Driver.h>
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#include <dlfcn.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<StringView, char const*> const s_driver_path_map {
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#if defined(AK_OS_SERENITY)
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{ "softgpu"sv, "libsoftgpu.so.serenity" },
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{ "v3dgpu"sv, "libv3dgpu.so.serenity" },
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{ "virtgpu"sv, "libvirtgpu.so.serenity" },
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#elif defined(AK_OS_MACOS)
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{ "softgpu"sv, "liblagom-softgpu.dylib" },
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#else
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{ "softgpu"sv, "liblagom-softgpu.so.0" },
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#endif
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};
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static HashMap<ByteString, 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, 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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