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/*
* Copyright (C) 2020 The Android Open Source Project
*
* 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.
*/
#ifndef DISPLAY_COLOR_LOADER_H
#define DISPLAY_COLOR_LOADER_H
#include <dlfcn.h>
#include <gs101/displaycolor/displaycolor_gs101.h>
#include <log/log.h>
#include <string>
#include <vector>
namespace gs101 {
class DisplayColorLoader {
public:
DisplayColorLoader(const char *lib_name) {
lib_handle = dlopen(lib_name, RTLD_LAZY);
if (lib_handle != nullptr) {
const displaycolor::DisplayColorIntfVer *(*get_version)();
get_version = (decltype(get_version))
dlsym(lib_handle, "GetInterfaceVersion");
if (get_version == nullptr) {
ALOGE("%s: prebuilt lib is not versioned", __func__);
} else {
auto intf_ver = get_version();
if (intf_ver != nullptr &&
displaycolor::kInterfaceVersion.Compatible(*intf_ver)) {
get_display_color_gs101 =
(decltype(get_display_color_gs101))dlsym(lib_handle,
"GetDisplayColorGS101");
if (get_display_color_gs101 == nullptr) {
ALOGE("%s: failed to get GetDisplayColorGS101\n", __func__);
} else if (!(displaycolor::kInterfaceVersion == *intf_ver)) {
ALOGW("%s: different hwc/displaycolor patch level %u.%u.%u/%u",
__func__,
intf_ver->major,
intf_ver->minor,
displaycolor::kInterfaceVersion.patch,
intf_ver->patch);
}
} else {
if (intf_ver != nullptr) {
ALOGE("%s: prebuilt lib version %u.%u.%u expected %u.%u.%u",
__func__,
intf_ver->major,
intf_ver->minor,
intf_ver->patch,
displaycolor::kInterfaceVersion.major,
displaycolor::kInterfaceVersion.minor,
displaycolor::kInterfaceVersion.patch);
} else {
ALOGE("%s: prebult lib get_version returns null", __func__);
}
}
}
} else {
ALOGE("%s: failed to load library %s\n", __func__, lib_name);
get_display_color_gs101 = nullptr;
}
}
displaycolor::IDisplayColorGS101 *GetDisplayColorGS101(
const std::vector<displaycolor::DisplayInfo> &display_info) {
if (get_display_color_gs101 != nullptr) {
return get_display_color_gs101(display_info);
}
return nullptr;
}
~DisplayColorLoader() {
if (lib_handle != nullptr) {
dlclose(lib_handle);
}
}
private:
void *lib_handle;
displaycolor::IDisplayColorGS101 *(*get_display_color_gs101)(
const std::vector<displaycolor::DisplayInfo> &);
};
} // namespace gs101
#endif //DISPLAY_COLOR_LOADER_H
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