Everywhere: Hoist the Services folder to the top-level

Author: https://github.com/trflynn89
Commit: 22e0eeada2
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Services/ImageDecoder/ConnectionFromClient.cpp

@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <andreas@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <AK/Debug.h>
+#include <AK/IDAllocator.h>
+#include <ImageDecoder/ConnectionFromClient.h>
+#include <ImageDecoder/ImageDecoderClientEndpoint.h>
+#include <LibGfx/Bitmap.h>
+#include <LibGfx/ImageFormats/ImageDecoder.h>
+#include <LibGfx/ImageFormats/TIFFMetadata.h>
+
+namespace ImageDecoder {
+
+static HashMap<int, RefPtr<ConnectionFromClient>> s_connections;
+static IDAllocator s_client_ids;
+
+ConnectionFromClient::ConnectionFromClient(IPC::Transport transport)
+    : IPC::ConnectionFromClient<ImageDecoderClientEndpoint, ImageDecoderServerEndpoint>(*this, move(transport), s_client_ids.allocate())
+{
+    s_connections.set(client_id(), *this);
+}
+
+void ConnectionFromClient::die()
+{
+    for (auto& [_, job] : m_pending_jobs) {
+        job->cancel();
+    }
+    m_pending_jobs.clear();
+
+    auto client_id = this->client_id();
+    s_connections.remove(client_id);
+    s_client_ids.deallocate(client_id);
+
+    if (s_connections.is_empty()) {
+        Threading::quit_background_thread();
+        Core::EventLoop::current().quit(0);
+    }
+}
+
+ErrorOr<IPC::File> ConnectionFromClient::connect_new_client()
+{
+    int socket_fds[2] {};
+    if (auto err = Core::System::socketpair(AF_LOCAL, SOCK_STREAM, 0, socket_fds); err.is_error())
+        return err.release_error();
+
+    auto client_socket_or_error = Core::LocalSocket::adopt_fd(socket_fds[0]);
+    if (client_socket_or_error.is_error()) {
+        close(socket_fds[0]);
+        close(socket_fds[1]);
+        return client_socket_or_error.release_error();
+    }
+
+    auto client_socket = client_socket_or_error.release_value();
+    // Note: A ref is stored in the static s_connections map
+    auto client = adopt_ref(*new ConnectionFromClient(IPC::Transport(move(client_socket))));
+
+    return IPC::File::adopt_fd(socket_fds[1]);
+}
+
+Messages::ImageDecoderServer::ConnectNewClientsResponse ConnectionFromClient::connect_new_clients(size_t count)
+{
+    Vector<IPC::File> files;
+    files.ensure_capacity(count);
+    for (size_t i = 0; i < count; ++i) {
+        auto file_or_error = connect_new_client();
+        if (file_or_error.is_error()) {
+            dbgln("Failed to connect new client: {}", file_or_error.error());
+            return Vector<IPC::File> {};
+        }
+        files.unchecked_append(file_or_error.release_value());
+    }
+    return files;
+}
+
+static void decode_image_to_bitmaps_and_durations_with_decoder(Gfx::ImageDecoder const& decoder, Optional<Gfx::IntSize> ideal_size, Vector<Optional<NonnullRefPtr<Gfx::Bitmap>>>& bitmaps, Vector<u32>& durations)
+{
+    for (size_t i = 0; i < decoder.frame_count(); ++i) {
+        auto frame_or_error = decoder.frame(i, ideal_size);
+        if (frame_or_error.is_error()) {
+            bitmaps.append({});
+            durations.append(0);
+        } else {
+            auto frame = frame_or_error.release_value();
+            bitmaps.append(frame.image.release_nonnull());
+            durations.append(frame.duration);
+        }
+    }
+}
+
+static ErrorOr<ConnectionFromClient::DecodeResult> decode_image_to_details(Core::AnonymousBuffer const& encoded_buffer, Optional<Gfx::IntSize> ideal_size, Optional<ByteString> const& known_mime_type)
+{
+    auto decoder = TRY(Gfx::ImageDecoder::try_create_for_raw_bytes(ReadonlyBytes { encoded_buffer.data<u8>(), encoded_buffer.size() }, known_mime_type));
+
+    if (!decoder)
+        return Error::from_string_literal("Could not find suitable image decoder plugin for data");
+
+    if (!decoder->frame_count())
+        return Error::from_string_literal("Could not decode image from encoded data");
+
+    ConnectionFromClient::DecodeResult result;
+    result.is_animated = decoder->is_animated();
+    result.loop_count = decoder->loop_count();
+
+    Vector<Optional<NonnullRefPtr<Gfx::Bitmap>>> bitmaps;
+
+    if (auto maybe_metadata = decoder->metadata(); maybe_metadata.has_value() && is<Gfx::ExifMetadata>(*maybe_metadata)) {
+        auto const& exif = static_cast<Gfx::ExifMetadata const&>(maybe_metadata.value());
+        if (exif.x_resolution().has_value() && exif.y_resolution().has_value()) {
+            auto const x_resolution = exif.x_resolution()->as_double();
+            auto const y_resolution = exif.y_resolution()->as_double();
+            if (x_resolution < y_resolution)
+                result.scale.set_y(x_resolution / y_resolution);
+            else
+                result.scale.set_x(y_resolution / x_resolution);
+        }
+    }
+
+    decode_image_to_bitmaps_and_durations_with_decoder(*decoder, move(ideal_size), bitmaps, result.durations);
+
+    if (bitmaps.is_empty())
+        return Error::from_string_literal("Could not decode image");
+
+    result.bitmaps = Gfx::BitmapSequence { bitmaps };
+
+    return result;
+}
+
+NonnullRefPtr<ConnectionFromClient::Job> ConnectionFromClient::make_decode_image_job(i64 image_id, Core::AnonymousBuffer encoded_buffer, Optional<Gfx::IntSize> ideal_size, Optional<ByteString> mime_type)
+{
+    return Job::construct(
+        [encoded_buffer = move(encoded_buffer), ideal_size = move(ideal_size), mime_type = move(mime_type)](auto&) -> ErrorOr<DecodeResult> {
+            return TRY(decode_image_to_details(encoded_buffer, ideal_size, mime_type));
+        },
+        [strong_this = NonnullRefPtr(*this), image_id](DecodeResult result) -> ErrorOr<void> {
+            strong_this->async_did_decode_image(image_id, result.is_animated, result.loop_count, result.bitmaps, result.durations, result.scale);
+            strong_this->m_pending_jobs.remove(image_id);
+            return {};
+        },
+        [strong_this = NonnullRefPtr(*this), image_id](Error error) -> void {
+            if (strong_this->is_open())
+                strong_this->async_did_fail_to_decode_image(image_id, MUST(String::formatted("Decoding failed: {}", error)));
+            strong_this->m_pending_jobs.remove(image_id);
+        });
+}
+
+Messages::ImageDecoderServer::DecodeImageResponse ConnectionFromClient::decode_image(Core::AnonymousBuffer const& encoded_buffer, Optional<Gfx::IntSize> const& ideal_size, Optional<ByteString> const& mime_type)
+{
+    auto image_id = m_next_image_id++;
+
+    if (!encoded_buffer.is_valid()) {
+        dbgln_if(IMAGE_DECODER_DEBUG, "Encoded data is invalid");
+        async_did_fail_to_decode_image(image_id, "Encoded data is invalid"_string);
+        return image_id;
+    }
+
+    m_pending_jobs.set(image_id, make_decode_image_job(image_id, encoded_buffer, ideal_size, mime_type));
+
+    return image_id;
+}
+
+void ConnectionFromClient::cancel_decoding(i64 image_id)
+{
+    if (auto job = m_pending_jobs.take(image_id); job.has_value()) {
+        job.value()->cancel();
+    }
+}
+
+}