diff options
author | Benjamin Barenblat <bbarenblat@gmail.com> | 2022-01-17 23:12:32 -0500 |
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committer | Benjamin Barenblat <bbarenblat@gmail.com> | 2022-01-30 15:55:27 -0500 |
commit | d0e18bdb7924c71cdca8dd983711171d87ef28be (patch) | |
tree | 6be11aae0b7c8874e6507b75b4ef26d1353952c7 /src/x/event.cc |
glplanet draws Earth like it currently appears from space, putting
nighttime areas in shadow and daytime areas in light. It’s modeled
after Xplanet (http://xplanet.sourceforge.net/), but whereas Xplanet is
entirely a CPU-resident program, glplanet draws using OpenGL. It’s thus
much less resource-intensive, particularly when using high-resolution
textures.
Diffstat (limited to 'src/x/event.cc')
-rw-r--r-- | src/x/event.cc | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/x/event.cc b/src/x/event.cc new file mode 100644 index 0000000..8346b40 --- /dev/null +++ b/src/x/event.cc @@ -0,0 +1,59 @@ +// Copyright 2021, 2022 Benjamin Barenblat +// +// Licensed under the Apache License, Version 2.0 (the "License"); you may not +// use this file except in compliance with the License. You may obtain a copy of +// the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +// License for the specific language governing permissions and limitations under +// the License. + +#include "src/x/event.h" + +#include <stdint.h> +#include <string.h> +#include <xcb/xcb.h> + +#include <algorithm> +#include <array> +#include <stdexcept> + +#include "third_party/abseil/absl/types/variant.h" + +namespace x { + +namespace { + +constexpr uint8_t kXcbResponseTypeMask = 0x7f; + +} // namespace + +Event FromXcbGenericEvent(const xcb_generic_event_t& event) noexcept { + switch (event.response_type & kXcbResponseTypeMask) { + case XCB_EXPOSE: + return ExposeEvent(event); + case XCB_CONFIGURE_NOTIFY: + return ConfigureNotifyEvent(event); + case XCB_CLIENT_MESSAGE: + return ClientMessageEvent(event); + default: + return UnknownEvent(event); + } +} + +std::array<char, 32> SerializeEvent(const Event& event) noexcept { + std::array<char, 32> raw = {}; + absl::visit( + [&](auto&& ev) { + const auto& xcb_ev = ev.AsXcbEvent(); + memcpy(raw.data(), &xcb_ev, std::min(raw.size(), sizeof(xcb_ev))); + }, + event); + return raw; +} + +} // namespace x |