| // Copyright 2022 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/ContextEGL.h" |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "dawn/native/opengl/UtilsEGL.h" |
| |
| #ifndef EGL_DISPLAY_TEXTURE_SHARE_GROUP_ANGLE |
| #define EGL_DISPLAY_TEXTURE_SHARE_GROUP_ANGLE 0x33AF |
| #endif |
| |
| namespace dawn::native::opengl { |
| |
| ResultOrError<std::unique_ptr<ContextEGL>> ContextEGL::Create(const EGLFunctions& egl, |
| EGLenum api, |
| EGLDisplay display, |
| bool useANGLETextureSharing) { |
| EGLint renderableType = api == EGL_OPENGL_ES_API ? EGL_OPENGL_ES3_BIT : EGL_OPENGL_BIT; |
| |
| EGLint major, minor; |
| |
| DAWN_TRY(CheckEGL(egl, egl.Initialize(display, &major, &minor), "eglInitialize")); |
| |
| // We use EGLImage unconditionally, which only became core in 1.5. |
| DAWN_INVALID_IF(major < 1 || (major == 1 && minor < 5), |
| "EGL version (%u.%u) must be at least 1.5", major, minor); |
| |
| // 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; |
| DAWN_TRY(CheckEGL(egl, egl.ChooseConfig(display, config_attribs, &config, 1, &num_config), |
| "eglChooseConfig")); |
| |
| DAWN_INVALID_IF(num_config == 0, "eglChooseConfig returned zero configs"); |
| |
| DAWN_TRY(CheckEGL(egl, egl.BindAPI(api), "eglBindAPI")); |
| |
| if (api == EGL_OPENGL_ES_API) { |
| major = 3; |
| minor = 1; |
| } else { |
| major = 4; |
| minor = 4; |
| } |
| |
| const char* extensions = egl.QueryString(display, EGL_EXTENSIONS); |
| if (strstr(extensions, "EGL_EXT_create_context_robustness") == nullptr) { |
| return DAWN_INTERNAL_ERROR("EGL_EXT_create_context_robustness must be supported"); |
| } |
| |
| std::vector<EGLint> attrib_list{ |
| EGL_CONTEXT_MAJOR_VERSION, |
| major, |
| EGL_CONTEXT_MINOR_VERSION, |
| minor, |
| EGL_CONTEXT_OPENGL_ROBUST_ACCESS, // Core in EGL 1.5 |
| EGL_TRUE, |
| }; |
| if (useANGLETextureSharing) { |
| if (strstr(extensions, "EGL_ANGLE_display_texture_share_group") == nullptr) { |
| return DAWN_INTERNAL_ERROR( |
| "GL_ANGLE_display_texture_share_group must be supported to use GL texture sharing"); |
| } |
| attrib_list.push_back(EGL_DISPLAY_TEXTURE_SHARE_GROUP_ANGLE); |
| attrib_list.push_back(EGL_TRUE); |
| } |
| attrib_list.push_back(EGL_NONE); |
| |
| EGLContext context = egl.CreateContext(display, config, EGL_NO_CONTEXT, attrib_list.data()); |
| DAWN_TRY(CheckEGL(egl, context != EGL_NO_CONTEXT, "eglCreateContext")); |
| |
| 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 |