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LibGfx: Make Gfx::ShareableBitmap use anonymous files instead of shbufs

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This commit is contained in:
Andreas Kling 2021-01-15 22:36:36 +01:00
parent adb9ade88d
commit 633915e792
7 changed files with 38 additions and 32 deletions
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28
Userland/Libraries/LibGfx/Bitmap.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -44,6 +44,10 @@
#include <stdio.h>
#include <sys/mman.h>
#ifdef __serenity__
# include <serenity.h>
#endif
namespace Gfx {
struct BackingStore {
@ -408,6 +412,22 @@ RefPtr<Bitmap> Bitmap::to_bitmap_backed_by_shared_buffer() const
return bitmap;
}
#ifdef __serenity__
RefPtr<Bitmap> Bitmap::to_bitmap_backed_by_anon_fd() const
{
if (m_anon_fd != -1)
return *this;
auto anon_fd = anon_create(round_up_to_power_of_two(size_in_bytes(), PAGE_SIZE), O_CLOEXEC);
if (anon_fd < 0)
return nullptr;
auto bitmap = Bitmap::create_with_anon_fd(m_format, anon_fd, m_size, ShouldCloseAnonymousFile::No);
if (!bitmap)
return nullptr;
memcpy(bitmap->scanline(0), scanline(0), size_in_bytes());
return bitmap;
}
#endif
Bitmap::~Bitmap()
{
if (m_needs_munmap) {
@ -477,13 +497,11 @@ int Bitmap::shbuf_id() const
return m_shared_buffer ? m_shared_buffer->shbuf_id() : -1;
}
ShareableBitmap Bitmap::to_shareable_bitmap(pid_t peer_pid) const
ShareableBitmap Bitmap::to_shareable_bitmap() const
{
auto bitmap = to_bitmap_backed_by_shared_buffer();
auto bitmap = to_bitmap_backed_by_anon_fd();
if (!bitmap)
return {};
if (peer_pid > 0)
bitmap->shared_buffer()->share_with(peer_pid);
return ShareableBitmap(*bitmap);
}