| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * 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 "../gles_gfx_api.h" |
| #include "../gles_renderer.h" |
| |
| #include <gapic/gl/formats.h> |
| #include <gapic/log.h> |
| |
| #include <EGL/egl.h> |
| |
| namespace gapir { |
| namespace { |
| |
| class GlesRendererImpl : public GlesRenderer { |
| public: |
| GlesRendererImpl(); |
| virtual ~GlesRendererImpl() override; |
| |
| virtual Api* api() override; |
| virtual void setBackbuffer(Backbuffer backbuffer) override; |
| virtual void bind() override; |
| virtual void unbind() override; |
| virtual const char* name() override; |
| virtual const char* extensions() override; |
| virtual const char* vendor() override; |
| virtual const char* version() override; |
| |
| private: |
| void reset(); |
| |
| Backbuffer mBackbuffer; |
| bool mBound; |
| bool mNeedsResolve; |
| Gles mApi; |
| |
| EGLContext mContext; |
| EGLSurface mSurface; |
| EGLDisplay mDisplay; |
| }; |
| |
| GlesRendererImpl::GlesRendererImpl() |
| : mBound(false) |
| , mNeedsResolve(true) |
| , mContext(EGL_NO_CONTEXT) |
| , mSurface(EGL_NO_SURFACE) { |
| |
| mDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY); |
| EGLint error = eglGetError(); |
| if (error != EGL_SUCCESS) { |
| GAPID_FATAL("Failed to get EGL display: %d", error); |
| } |
| |
| eglInitialize(mDisplay, nullptr, nullptr); |
| error = eglGetError(); |
| if (error != EGL_SUCCESS) { |
| GAPID_FATAL("Failed to initialize EGL: %d", error); |
| } |
| |
| eglBindAPI(EGL_OPENGL_ES_API); |
| error = eglGetError(); |
| if (error != EGL_SUCCESS) { |
| GAPID_FATAL("Failed to bind EGL API: %d", error); |
| } |
| |
| // Initialize with a default target. |
| setBackbuffer(Backbuffer( |
| 8, 8, |
| gapic::gl::GL_RGBA8, |
| gapic::gl::GL_DEPTH24_STENCIL8, |
| gapic::gl::GL_DEPTH24_STENCIL8)); |
| } |
| |
| GlesRendererImpl::~GlesRendererImpl() { |
| reset(); |
| |
| eglTerminate(mDisplay); |
| EGLint error = eglGetError(); |
| if (error != EGL_SUCCESS) { |
| GAPID_WARNING("Failed to terminate EGL: %d", error); |
| } |
| |
| eglReleaseThread(); |
| error = eglGetError(); |
| if (error != EGL_SUCCESS) { |
| GAPID_WARNING("Failed to release EGL thread: %d", error); |
| } |
| } |
| |
| Api* GlesRendererImpl::api() { |
| return &mApi; |
| } |
| |
| void GlesRendererImpl::reset() { |
| unbind(); |
| |
| if (mSurface != EGL_NO_SURFACE) { |
| eglDestroySurface(mDisplay, mSurface); |
| EGLint error = eglGetError(); |
| if (error != EGL_SUCCESS) { |
| GAPID_WARNING("Failed to destroy EGL surface: %d", error); |
| } |
| mSurface = EGL_NO_SURFACE; |
| } |
| |
| if (mContext != EGL_NO_CONTEXT) { |
| eglDestroyContext(mDisplay, mContext); |
| EGLint error = eglGetError(); |
| if (error != EGL_SUCCESS) { |
| GAPID_WARNING("Failed to destroy EGL context: %d", error); |
| } |
| mContext = EGL_NO_CONTEXT; |
| } |
| |
| mBackbuffer = Backbuffer(); |
| } |
| |
| void GlesRendererImpl::setBackbuffer(Backbuffer backbuffer) { |
| if (mContext != EGL_NO_CONTEXT && mBackbuffer == backbuffer) { |
| // No change |
| return; |
| } |
| |
| // TODO: Check for and handle resizing path. |
| |
| const bool wasBound = mBound; |
| |
| reset(); |
| |
| int r = 8, g = 8, b = 8, a = 8, d = 24, s = 8; |
| gapic::gl::getColorBits(backbuffer.format.color, r, g, b, a); |
| gapic::gl::getDepthBits(backbuffer.format.depth, d); |
| gapic::gl::getStencilBits(backbuffer.format.stencil, s); |
| |
| // Find a supported EGL context config. |
| const int configAttribList[] = { |
| EGL_RED_SIZE, r, |
| EGL_GREEN_SIZE, g, |
| EGL_BLUE_SIZE, b, |
| EGL_ALPHA_SIZE, a, |
| EGL_BUFFER_SIZE, r+g+b+a, |
| EGL_DEPTH_SIZE, d, |
| EGL_STENCIL_SIZE, s, |
| EGL_SURFACE_TYPE, EGL_PBUFFER_BIT, |
| EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, |
| EGL_NONE |
| }; |
| int one = 1; |
| EGLConfig eglConfig; |
| eglChooseConfig(mDisplay, configAttribList, &eglConfig, 1, &one); |
| EGLint error = eglGetError(); |
| if (error != EGL_SUCCESS) { |
| GAPID_FATAL("Failed to choose EGL config: %d", error); |
| } |
| |
| // Create an EGL context. |
| const int contextAttribList[] = { |
| EGL_CONTEXT_CLIENT_VERSION, 2, |
| EGL_NONE |
| }; |
| mContext = eglCreateContext(mDisplay, eglConfig, EGL_NO_CONTEXT, contextAttribList); |
| error = eglGetError(); |
| if (error != EGL_SUCCESS) { |
| GAPID_FATAL("Failed to create EGL context: %d", error); |
| } |
| |
| // Create an EGL surface for the read/draw framebuffer. |
| const int surfaceAttribList[] = { |
| EGL_WIDTH, backbuffer.width, |
| EGL_HEIGHT, backbuffer.height, |
| EGL_NONE |
| }; |
| mSurface = eglCreatePbufferSurface(mDisplay, eglConfig, surfaceAttribList); |
| error = eglGetError(); |
| if (error != EGL_SUCCESS) { |
| GAPID_FATAL("Failed to create EGL pbuffer surface: %d", error); |
| } |
| |
| mBackbuffer = backbuffer; |
| mNeedsResolve = true; |
| |
| if (wasBound) { |
| bind(); |
| } |
| } |
| |
| void GlesRendererImpl::bind() { |
| if (!mBound) { |
| eglMakeCurrent(mDisplay, mSurface, mSurface, mContext); |
| EGLint error = eglGetError(); |
| if (error != EGL_SUCCESS) { |
| GAPID_FATAL("Failed to make EGL current: %d", error); |
| } |
| |
| mBound = true; |
| |
| if (mNeedsResolve) { |
| mNeedsResolve = false; |
| mApi.resolve(); |
| } |
| } |
| } |
| |
| void GlesRendererImpl::unbind() { |
| if (mBound) { |
| eglMakeCurrent(mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); |
| EGLint error = eglGetError(); |
| if (error != EGL_SUCCESS) { |
| GAPID_WARNING("Failed to release EGL context: %d", error); |
| } |
| mBound = false; |
| } |
| } |
| |
| const char* GlesRendererImpl::name() { |
| return reinterpret_cast<const char*>( |
| mApi.mFunctionStubs.glGetString(Gles::GLenum::GL_RENDERER)); |
| } |
| |
| const char* GlesRendererImpl::extensions() { |
| return reinterpret_cast<const char*>( |
| mApi.mFunctionStubs.glGetString(Gles::GLenum::GL_EXTENSIONS)); |
| } |
| |
| const char* GlesRendererImpl::vendor() { |
| return reinterpret_cast<const char*>( |
| mApi.mFunctionStubs.glGetString(Gles::GLenum::GL_VENDOR)); |
| } |
| |
| const char* GlesRendererImpl::version() { |
| return reinterpret_cast<const char*>( |
| mApi.mFunctionStubs.glGetString(Gles::GLenum::GL_VERSION)); |
| } |
| |
| } // anonymous namespace |
| |
| GlesRenderer* GlesRenderer::create() { |
| return new GlesRendererImpl(); |
| } |
| |
| } // namespace gapir |