| // Copyright 2022 The Dawn Authors |
| // |
| // 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 "dawn/native/opengl/ContextEGL.h" |
| |
| #include <memory> |
| #include <vector> |
| |
| namespace dawn::native::opengl { |
| |
| std::unique_ptr<ContextEGL> ContextEGL::Create(const EGLFunctions& egl, EGLenum api) { |
| EGLDisplay display = egl.GetCurrentDisplay(); |
| |
| if (display == EGL_NO_DISPLAY) { |
| display = egl.GetDisplay(EGL_DEFAULT_DISPLAY); |
| } |
| |
| if (display == EGL_NO_DISPLAY) { |
| return nullptr; |
| } |
| |
| EGLint renderableType = api == EGL_OPENGL_ES_API ? EGL_OPENGL_ES3_BIT : EGL_OPENGL_BIT; |
| |
| egl.Initialize(display, nullptr, nullptr); |
| |
| // Since we're creating a surfaceless context, the only thing we really care |
| // about is the RENDERABLE_TYPE. |
| EGLint config_attribs[] = {EGL_RENDERABLE_TYPE, renderableType, EGL_NONE}; |
| |
| EGLint num_config; |
| EGLConfig config; |
| if (egl.ChooseConfig(display, config_attribs, &config, 1, &num_config) == EGL_FALSE) { |
| return nullptr; |
| } |
| |
| if (!egl.BindAPI(api)) { |
| return nullptr; |
| } |
| |
| EGLint major, minor; |
| if (api == EGL_OPENGL_ES_API) { |
| major = 3; |
| minor = 1; |
| } else { |
| major = 4; |
| minor = 4; |
| } |
| EGLint attrib_list[] = { |
| EGL_CONTEXT_MAJOR_VERSION, major, EGL_CONTEXT_MINOR_VERSION, minor, EGL_NONE, EGL_NONE, |
| }; |
| EGLContext context = egl.CreateContext(display, config, EGL_NO_CONTEXT, attrib_list); |
| if (!context) { |
| return nullptr; |
| } |
| |
| return std::unique_ptr<ContextEGL>(new ContextEGL(egl, display, context)); |
| } |
| |
| void ContextEGL::MakeCurrent() { |
| egl.MakeCurrent(mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, mContext); |
| } |
| |
| ContextEGL::~ContextEGL() { |
| egl.DestroyContext(mDisplay, mContext); |
| } |
| |
| } // namespace dawn::native::opengl |