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https://github.com/RGBCube/serenity
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LibGfx: Make Gfx::ShareableBitmap use anonymous files instead of shbufs
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parent
adb9ade88d
commit
633915e792
7 changed files with 38 additions and 32 deletions
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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@ -44,6 +44,10 @@
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#include <stdio.h>
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#include <sys/mman.h>
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#ifdef __serenity__
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# include <serenity.h>
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#endif
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namespace Gfx {
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struct BackingStore {
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@ -408,6 +412,22 @@ RefPtr<Bitmap> Bitmap::to_bitmap_backed_by_shared_buffer() const
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return bitmap;
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}
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#ifdef __serenity__
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RefPtr<Bitmap> Bitmap::to_bitmap_backed_by_anon_fd() const
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{
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if (m_anon_fd != -1)
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return *this;
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auto anon_fd = anon_create(round_up_to_power_of_two(size_in_bytes(), PAGE_SIZE), O_CLOEXEC);
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if (anon_fd < 0)
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return nullptr;
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auto bitmap = Bitmap::create_with_anon_fd(m_format, anon_fd, m_size, ShouldCloseAnonymousFile::No);
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if (!bitmap)
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return nullptr;
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memcpy(bitmap->scanline(0), scanline(0), size_in_bytes());
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return bitmap;
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}
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#endif
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Bitmap::~Bitmap()
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{
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if (m_needs_munmap) {
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@ -477,13 +497,11 @@ int Bitmap::shbuf_id() const
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return m_shared_buffer ? m_shared_buffer->shbuf_id() : -1;
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}
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ShareableBitmap Bitmap::to_shareable_bitmap(pid_t peer_pid) const
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ShareableBitmap Bitmap::to_shareable_bitmap() const
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{
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auto bitmap = to_bitmap_backed_by_shared_buffer();
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auto bitmap = to_bitmap_backed_by_anon_fd();
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if (!bitmap)
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return {};
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if (peer_pid > 0)
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bitmap->shared_buffer()->share_with(peer_pid);
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return ShareableBitmap(*bitmap);
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}
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@ -118,9 +118,10 @@ public:
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RefPtr<Gfx::Bitmap> rotated(Gfx::RotationDirection) const;
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RefPtr<Gfx::Bitmap> flipped(Gfx::Orientation) const;
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RefPtr<Bitmap> to_bitmap_backed_by_shared_buffer() const;
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RefPtr<Bitmap> to_bitmap_backed_by_anon_fd() const;
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ByteBuffer serialize_to_byte_buffer() const;
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ShareableBitmap to_shareable_bitmap(pid_t peer_pid = -1) const;
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ShareableBitmap to_shareable_bitmap() const;
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~Bitmap();
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@ -30,11 +30,12 @@
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#include <LibGfx/Size.h>
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#include <LibIPC/Decoder.h>
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#include <LibIPC/Encoder.h>
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#include <LibIPC/File.h>
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namespace Gfx {
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ShareableBitmap::ShareableBitmap(const Bitmap& bitmap)
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: m_bitmap(bitmap.to_bitmap_backed_by_shared_buffer())
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: m_bitmap(bitmap.to_bitmap_backed_by_anon_fd())
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{
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}
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@ -44,7 +45,7 @@ namespace IPC {
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bool encode(Encoder& encoder, const Gfx::ShareableBitmap& shareable_bitmap)
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{
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encoder << shareable_bitmap.shbuf_id();
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encoder << IPC::File(shareable_bitmap.anon_fd());
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encoder << shareable_bitmap.width();
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encoder << shareable_bitmap.height();
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return true;
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@ -52,23 +53,14 @@ bool encode(Encoder& encoder, const Gfx::ShareableBitmap& shareable_bitmap)
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bool decode(Decoder& decoder, Gfx::ShareableBitmap& shareable_bitmap)
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{
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i32 shbuf_id = 0;
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IPC::File anon_file;
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Gfx::IntSize size;
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if (!decoder.decode(shbuf_id))
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if (!decoder.decode(anon_file))
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return false;
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if (!decoder.decode(size))
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return false;
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if (shbuf_id == -1)
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return true;
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dbgln("Decoding a ShareableBitmap with shbuf_id={}, size={}", shbuf_id, size);
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auto shared_buffer = SharedBuffer::create_from_shbuf_id(shbuf_id);
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if (!shared_buffer)
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return false;
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auto bitmap = Gfx::Bitmap::create_with_shared_buffer(Gfx::BitmapFormat::RGBA32, shared_buffer.release_nonnull(), size);
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auto bitmap = Gfx::Bitmap::create_with_anon_fd(Gfx::BitmapFormat::RGBA32, anon_file.fd(), size, Gfx::Bitmap::ShouldCloseAnonymousFile::No);
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shareable_bitmap = bitmap->to_shareable_bitmap();
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return true;
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}
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@ -39,7 +39,7 @@ public:
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bool is_valid() const { return m_bitmap; }
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i32 shbuf_id() const { return m_bitmap ? m_bitmap->shbuf_id() : -1; }
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int anon_fd() const { return m_bitmap ? m_bitmap->anon_fd() : -1; }
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const Bitmap* bitmap() const { return m_bitmap; }
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Bitmap* bitmap() { return m_bitmap; }
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