| // Copyright 2019 The Dawn & Tint Authors |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above copyright notice, this |
| // list of conditions and the following disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // |
| // 3. Neither the name of the copyright holder nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "dawn/native/opengl/BackendGL.h" |
| |
| #include <string> |
| |
| #include "dawn/native/ChainUtils.h" |
| #include "dawn/native/Instance.h" |
| #include "dawn/native/OpenGLBackend.h" |
| #include "dawn/native/opengl/PhysicalDeviceGL.h" |
| |
| namespace dawn::native::opengl { |
| |
| // Implementation of the OpenGL backend's BackendConnection |
| |
| Backend::Backend(InstanceBase* instance, wgpu::BackendType backendType) |
| : BackendConnection(instance, backendType) {} |
| |
| std::vector<Ref<PhysicalDeviceBase>> Backend::DiscoverPhysicalDevices( |
| const UnpackedPtr<RequestAdapterOptions>& options) { |
| if (options->forceFallbackAdapter) { |
| return {}; |
| } |
| if (!options->compatibilityMode) { |
| // Return an empty vector since GL physical devices can only support compatibility mode. |
| return std::vector<Ref<PhysicalDeviceBase>>{}; |
| } |
| |
| void* (*getProc)(const char* name) = nullptr; |
| EGLDisplay display = EGL_NO_DISPLAY; |
| |
| if (auto* glGetProcOptions = options.Get<RequestAdapterOptionsGetGLProc>()) { |
| getProc = glGetProcOptions->getProc; |
| display = glGetProcOptions->display; |
| } |
| |
| if (getProc == nullptr) { |
| // getProc not passed. Try to load it from libEGL. |
| |
| #if DAWN_PLATFORM_IS(WINDOWS) |
| const char* eglLib = "libEGL.dll"; |
| #elif DAWN_PLATFORM_IS(MACOS) |
| const char* eglLib = "libEGL.dylib"; |
| #else |
| const char* eglLib = "libEGL.so"; |
| #endif |
| std::string err; |
| if (!mLibEGL.Valid() && !mLibEGL.Open(eglLib, &err)) { |
| GetInstance()->ConsumedErrorAndWarnOnce( |
| DAWN_VALIDATION_ERROR("Failed to load %s: %s", eglLib, err.c_str())); |
| return {}; |
| } |
| |
| getProc = reinterpret_cast<void* (*)(const char*)>(mLibEGL.GetProc("eglGetProcAddress")); |
| if (!getProc) { |
| GetInstance()->ConsumedErrorAndWarnOnce( |
| DAWN_VALIDATION_ERROR("eglGetProcAddress return nullptr")); |
| return {}; |
| } |
| } |
| |
| return DiscoverPhysicalDevicesWithProcs(getProc, display); |
| } |
| |
| std::vector<Ref<PhysicalDeviceBase>> Backend::DiscoverPhysicalDevicesWithProcs( |
| void* (*getProc)(const char*), |
| EGLDisplay display) { |
| // TODO(cwallez@chromium.org): For now only create a single OpenGL physicalDevice because don't |
| // know how to handle MakeCurrent. |
| if (mPhysicalDevice != nullptr && (mGetProc != getProc || mDisplay != display)) { |
| GetInstance()->ConsumedErrorAndWarnOnce( |
| DAWN_VALIDATION_ERROR("The OpenGL backend can only create a single physicalDevice.")); |
| return {}; |
| } |
| if (mPhysicalDevice == nullptr) { |
| if (GetInstance()->ConsumedErrorAndWarnOnce( |
| PhysicalDevice::Create(GetInstance(), GetType(), getProc, display), |
| &mPhysicalDevice)) { |
| return {}; |
| } |
| mGetProc = getProc; |
| mDisplay = display; |
| } |
| return {mPhysicalDevice}; |
| } |
| |
| void Backend::ClearPhysicalDevices() { |
| mPhysicalDevice = nullptr; |
| } |
| |
| size_t Backend::GetPhysicalDeviceCountForTesting() const { |
| return mPhysicalDevice != nullptr ? 1 : 0; |
| } |
| |
| BackendConnection* Connect(InstanceBase* instance, wgpu::BackendType backendType) { |
| return new Backend(instance, backendType); |
| } |
| |
| } // namespace dawn::native::opengl |