64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <dlfcn.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <utils/Log.h>
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namespace bluevk {
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static void* module = nullptr;
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// Determines the file path to the Vulkan library and calls dlopen on it.
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// Returns false on failure.
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bool loadLibrary() {
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const char* path = nullptr;
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// For security, consult an environment variable only if Filament is built with this #define
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// enabled. Our weekly GitHub releases do not have this enabled.
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#ifdef FILAMENT_VKLIBRARY_USE_ENV
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path = getenv("FILAMENT_VKLIBRARY_PATH");
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#endif
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// If the environment variable is not set, fall back to a config-specified path, which is either
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// a custom path (common for SwiftShader), or "libvulkan.so" (common for Android).
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if (path == nullptr) {
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#ifdef FILAMENT_VKLIBRARY_PATH
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path = FILAMENT_VKLIBRARY_PATH;
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#elif defined(__ANDROID__)
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path = "libvulkan.so";
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#elif defined(__linux__)
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path = "libvulkan.so.1";
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#else
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#error "This file should only be compiled for Android or Linux"
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#endif
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}
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module = dlopen(path, RTLD_NOW | RTLD_LOCAL);
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if (module == nullptr) {
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utils::slog.e << "Unable to load Vulkan from " << path << utils::io::endl;
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}
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return module != nullptr;
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}
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void* getInstanceProcAddr() {
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return dlsym(module, "vkGetInstanceProcAddr");
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}
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} // namespace bluevk
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