| // Copyright 2024 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/DisplayEGL.h" |
| |
| #include <string> |
| #include <utility> |
| |
| namespace dawn::native::opengl { |
| |
| // static |
| ResultOrError<std::unique_ptr<DisplayEGL>> DisplayEGL::CreateFromDynamicLoading( |
| wgpu::BackendType backend, |
| const char* libName) { |
| auto display = std::make_unique<DisplayEGL>(backend); |
| DAWN_TRY(display->InitializeWithDynamicLoading(libName)); |
| return std::move(display); |
| } |
| |
| // static |
| ResultOrError<std::unique_ptr<DisplayEGL>> DisplayEGL::CreateFromProcAndDisplay( |
| wgpu::BackendType backend, |
| EGLGetProcProc getProc, |
| EGLDisplay eglDisplay) { |
| auto display = std::make_unique<DisplayEGL>(backend); |
| DAWN_TRY(display->InitializeWithProcAndDisplay(getProc, eglDisplay)); |
| return std::move(display); |
| } |
| |
| DisplayEGL::DisplayEGL(wgpu::BackendType backend) : egl(mFunctions) { |
| switch (backend) { |
| case wgpu::BackendType::OpenGL: |
| mApiEnum = EGL_OPENGL_API; |
| mApiBit = EGL_OPENGL_BIT; |
| mRenderableBit = EGL_OPENGL_BIT; |
| break; |
| case wgpu::BackendType::OpenGLES: |
| mApiEnum = EGL_OPENGL_ES_API; |
| mApiBit = EGL_OPENGL_ES3_BIT; |
| mRenderableBit = EGL_OPENGL_ES2_BIT; |
| break; |
| default: |
| DAWN_UNREACHABLE(); |
| } |
| } |
| |
| DisplayEGL::~DisplayEGL() { |
| if (mDisplay != EGL_NO_DISPLAY) { |
| // Note that we don't call eglTerminate on purpose here. Calls to eglGetDisplay may return |
| // the same display multiple times in which case eglInitialize is a noop (if the display is |
| // already initialized) and eglTerminate on one of the handles would terminate the |
| // EGLDisplay for everyone. |
| mDisplay = EGL_NO_DISPLAY; |
| } |
| } |
| |
| MaybeError DisplayEGL::InitializeWithDynamicLoading(const char* libName) { |
| std::string err; |
| if (!mLib.Valid() && !mLib.Open(libName, &err)) { |
| return DAWN_VALIDATION_ERROR("Failed to load %s: \"%s\".", libName, err.c_str()); |
| } |
| |
| EGLGetProcProc getProc = reinterpret_cast<EGLGetProcProc>(mLib.GetProc("eglGetProcAddress")); |
| if (!getProc) { |
| return DAWN_VALIDATION_ERROR("Couldn't get \"eglGetProcAddress\" from %s.", libName); |
| } |
| |
| return InitializeWithProcAndDisplay(getProc, EGL_NO_DISPLAY); |
| } |
| |
| MaybeError DisplayEGL::InitializeWithProcAndDisplay(EGLGetProcProc getProc, EGLDisplay display) { |
| // Load the EGL functions. |
| DAWN_TRY(mFunctions.LoadClientProcs(getProc)); |
| |
| mDisplay = display; |
| if (mDisplay == EGL_NO_DISPLAY) { |
| mDisplay = egl.GetDisplay(EGL_DEFAULT_DISPLAY); |
| } |
| if (mDisplay == EGL_NO_DISPLAY) { |
| return DAWN_VALIDATION_ERROR("Couldn't create the default EGL display."); |
| } |
| |
| DAWN_TRY(mFunctions.LoadDisplayProcs(mDisplay)); |
| |
| // We require at least EGL 1.4. |
| DAWN_INVALID_IF( |
| egl.GetMajorVersion() < 1 || (egl.GetMajorVersion() == 1 && egl.GetMinorVersion() < 4), |
| "EGL version (%u.%u) must be at least 1.4", egl.GetMajorVersion(), egl.GetMinorVersion()); |
| |
| return {}; |
| } |
| |
| EGLDisplay DisplayEGL::GetDisplay() const { |
| return mDisplay; |
| } |
| |
| EGLint DisplayEGL::GetAPIEnum() const { |
| return mApiEnum; |
| } |
| |
| EGLint DisplayEGL::GetAPIBit() const { |
| return mApiBit; |
| } |
| |
| absl::Span<const wgpu::TextureFormat> DisplayEGL::GetPotentialSurfaceFormats() const { |
| static constexpr wgpu::TextureFormat kFormatWhenConfigRequired[] = { |
| wgpu::TextureFormat::RGBA8Unorm}; |
| static constexpr wgpu::TextureFormat kFormatsWithNoConfigContext[] = { |
| wgpu::TextureFormat::RGBA8Unorm, wgpu::TextureFormat::RGBA8UnormSrgb, |
| wgpu::TextureFormat::RGB10A2Unorm, wgpu::TextureFormat::RGBA16Float}; |
| |
| if (egl.HasExt(EGLExt::NoConfigContext)) { |
| return {kFormatsWithNoConfigContext}; |
| } |
| return {kFormatWhenConfigRequired}; |
| } |
| |
| EGLConfig DisplayEGL::ChooseConfig(EGLint surfaceType, |
| wgpu::TextureFormat color, |
| wgpu::TextureFormat depthStencil) const { |
| absl::InlinedVector<EGLint, 20> attribs; |
| auto AddAttrib = [&](EGLint attrib, EGLint value) { |
| attribs.push_back(attrib); |
| attribs.push_back(value); |
| }; |
| |
| AddAttrib(EGL_SURFACE_TYPE, surfaceType); |
| AddAttrib(EGL_RENDERABLE_TYPE, mRenderableBit); |
| AddAttrib(EGL_CONFORMANT, mRenderableBit); |
| |
| switch (color) { |
| case wgpu::TextureFormat::RGBA8UnormSrgb: |
| if (!egl.HasExt(EGLExt::GLColorspace)) { |
| return kNoConfig; |
| } |
| [[fallthrough]]; |
| case wgpu::TextureFormat::RGBA8Unorm: |
| AddAttrib(EGL_RED_SIZE, 8); |
| AddAttrib(EGL_BLUE_SIZE, 8); |
| AddAttrib(EGL_GREEN_SIZE, 8); |
| AddAttrib(EGL_ALPHA_SIZE, 8); |
| break; |
| |
| case wgpu::TextureFormat::RGB10A2Unorm: |
| AddAttrib(EGL_RED_SIZE, 10); |
| AddAttrib(EGL_BLUE_SIZE, 10); |
| AddAttrib(EGL_GREEN_SIZE, 10); |
| AddAttrib(EGL_ALPHA_SIZE, 2); |
| break; |
| |
| case wgpu::TextureFormat::RGBA16Float: |
| if (!egl.HasExt(EGLExt::PixelFormatFloat)) { |
| return kNoConfig; |
| } |
| AddAttrib(EGL_RED_SIZE, 16); |
| AddAttrib(EGL_BLUE_SIZE, 16); |
| AddAttrib(EGL_GREEN_SIZE, 16); |
| AddAttrib(EGL_ALPHA_SIZE, 16); |
| AddAttrib(EGL_COLOR_COMPONENT_TYPE_EXT, EGL_COLOR_COMPONENT_TYPE_FLOAT_EXT); |
| break; |
| |
| default: |
| return kNoConfig; |
| } |
| |
| switch (depthStencil) { |
| case wgpu::TextureFormat::Depth24PlusStencil8: |
| AddAttrib(EGL_DEPTH_SIZE, 24); |
| AddAttrib(EGL_STENCIL_SIZE, 8); |
| break; |
| case wgpu::TextureFormat::Depth16Unorm: |
| AddAttrib(EGL_DEPTH_SIZE, 16); |
| break; |
| case wgpu::TextureFormat::Undefined: |
| break; |
| |
| default: |
| return kNoConfig; |
| } |
| |
| // The attrib list is finished with an EGL_NONE tag. |
| attribs.push_back(EGL_NONE); |
| |
| EGLConfig config = EGL_NO_CONFIG_KHR; |
| EGLint numConfigs = 0; |
| if (egl.ChooseConfig(mDisplay, attribs.data(), &config, 1, &numConfigs) == EGL_FALSE || |
| numConfigs == 0) { |
| return kNoConfig; |
| } |
| |
| return config; |
| } |
| |
| } // namespace dawn::native::opengl |
