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// Copyright 2021 The SwiftShader Authors. All Rights Reserved.
//
// 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
//
// http://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 "libXCB.hpp"
#include "System/SharedLibrary.hpp"
#include <memory>
LibXcbExports::LibXcbExports(void *libxcb, void *libshm)
{
getFuncAddress(libxcb, "xcb_create_gc", &xcb_create_gc);
getFuncAddress(libxcb, "xcb_flush", &xcb_flush);
getFuncAddress(libxcb, "xcb_free_gc", &xcb_free_gc);
getFuncAddress(libxcb, "xcb_generate_id", &xcb_generate_id);
getFuncAddress(libxcb, "xcb_get_geometry", &xcb_get_geometry);
getFuncAddress(libxcb, "xcb_get_geometry_reply", &xcb_get_geometry_reply);
getFuncAddress(libxcb, "xcb_put_image", &xcb_put_image);
getFuncAddress(libxcb, "xcb_copy_area", &xcb_copy_area);
getFuncAddress(libxcb, "xcb_free_pixmap", &xcb_free_pixmap);
getFuncAddress(libxcb, "xcb_get_extension_data", &xcb_get_extension_data);
getFuncAddress(libxcb, "xcb_connection_has_error", &xcb_connection_has_error);
getFuncAddress(libxcb, "xcb_get_maximum_request_length", &xcb_get_maximum_request_length);
getFuncAddress(libshm, "xcb_shm_query_version", &xcb_shm_query_version);
getFuncAddress(libshm, "xcb_shm_query_version_reply", &xcb_shm_query_version_reply);
getFuncAddress(libshm, "xcb_shm_attach", &xcb_shm_attach);
getFuncAddress(libshm, "xcb_shm_detach", &xcb_shm_detach);
getFuncAddress(libshm, "xcb_shm_create_pixmap", &xcb_shm_create_pixmap);
xcb_shm_id = (xcb_extension_t *)getProcAddress(libshm, "xcb_shm_id");
}
LibXcbExports *LibXCB::operator->()
{
return loadExports();
}
LibXcbExports *LibXCB::loadExports()
{
static LibXcbExports exports = [] {
void *libxcb = nullptr;
void *libshm = nullptr;
if(getProcAddress(RTLD_DEFAULT, "xcb_create_gc")) // Search the global scope for pre-loaded XCB library.
{
libxcb = RTLD_DEFAULT;
}
else
{
libxcb = loadLibrary("libxcb.so.1");
}
if(getProcAddress(RTLD_DEFAULT, "xcb_shm_query_version")) // Search the global scope for pre-loaded XCB library.
{
libshm = RTLD_DEFAULT;
}
else
{
libshm = loadLibrary("libxcb-shm.so.0");
}
return LibXcbExports(libxcb, libshm);
}();
return exports.xcb_create_gc ? &exports : nullptr;
}
LibXCB libXCB;