mirror of
https://github.com/LadybirdBrowser/ladybird
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75af441bff
Generalize the backing store sharing abstraction into SharedImage, which represents shared GPU memory independently of Skia and can be used to share memory between different processes or different GPU contexts.
78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
/*
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* Copyright (c) 2026, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/SharedImageBuffer.h>
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namespace Gfx {
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#ifdef AK_OS_MACOS
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static constexpr auto shared_image_buffer_format = BitmapFormat::BGRA8888;
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static constexpr auto shared_image_buffer_alpha_type = AlphaType::Premultiplied;
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static NonnullRefPtr<Bitmap> create_bitmap_from_iosurface(Core::IOSurfaceHandle const& iosurface_handle)
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{
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auto size = IntSize(static_cast<int>(iosurface_handle.width()), static_cast<int>(iosurface_handle.height()));
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auto bitmap_handle = Core::IOSurfaceHandle::from_mach_port(iosurface_handle.create_mach_port());
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return MUST(Bitmap::create_wrapper(shared_image_buffer_format, shared_image_buffer_alpha_type, size, iosurface_handle.bytes_per_row(), iosurface_handle.data(), [handle = move(bitmap_handle)] { }));
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}
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SharedImageBuffer::SharedImageBuffer(Core::IOSurfaceHandle&& iosurface_handle, NonnullRefPtr<Bitmap> bitmap)
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: m_iosurface_handle(move(iosurface_handle))
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, m_bitmap(move(bitmap))
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{
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}
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#else
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static constexpr auto shared_image_buffer_format = BitmapFormat::BGRA8888;
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static constexpr auto shared_image_buffer_alpha_type = AlphaType::Premultiplied;
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SharedImageBuffer::SharedImageBuffer(NonnullRefPtr<Bitmap> bitmap)
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: m_bitmap(move(bitmap))
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{
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}
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#endif
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SharedImageBuffer SharedImageBuffer::create(IntSize size)
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{
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#ifdef AK_OS_MACOS
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auto iosurface_handle = Core::IOSurfaceHandle::create(size.width(), size.height());
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auto bitmap = create_bitmap_from_iosurface(iosurface_handle);
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return SharedImageBuffer(move(iosurface_handle), move(bitmap));
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#else
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return SharedImageBuffer(MUST(Bitmap::create_shareable(shared_image_buffer_format, shared_image_buffer_alpha_type, size)));
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#endif
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}
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SharedImageBuffer SharedImageBuffer::import_from_shared_image(SharedImage shared_image)
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{
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#ifdef AK_OS_MACOS
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auto iosurface_handle = Core::IOSurfaceHandle::from_mach_port(shared_image.m_port);
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auto bitmap = create_bitmap_from_iosurface(iosurface_handle);
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return SharedImageBuffer(move(iosurface_handle), move(bitmap));
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#else
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auto* bitmap = shared_image.m_shareable_bitmap.bitmap();
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VERIFY(bitmap);
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return SharedImageBuffer(NonnullRefPtr { *bitmap });
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#endif
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}
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SharedImageBuffer::SharedImageBuffer(SharedImageBuffer&&) = default;
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SharedImageBuffer& SharedImageBuffer::operator=(SharedImageBuffer&&) = default;
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SharedImageBuffer::~SharedImageBuffer() = default;
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SharedImage SharedImageBuffer::export_shared_image() const
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{
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#ifdef AK_OS_MACOS
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return SharedImage { m_iosurface_handle.create_mach_port() };
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#else
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return SharedImage { ShareableBitmap { m_bitmap, ShareableBitmap::ConstructWithKnownGoodBitmap } };
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#endif
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}
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}
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