| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/gl/gl_context.h" |
| |
| #include "base/logging.h" |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/sys_info.h" |
| #include "ui/gl/gl_bindings.h" |
| #include "ui/gl/gl_context_egl.h" |
| #include "ui/gl/gl_context_osmesa.h" |
| #include "ui/gl/gl_context_stub.h" |
| #include "ui/gl/gl_implementation.h" |
| #include "ui/gl/gl_surface.h" |
| |
| namespace gfx { |
| |
| namespace { |
| |
| // Used to render into an already current context+surface, |
| // that we do not have ownership of (draw callback). |
| // TODO(boliu): Make this inherit from GLContextEGL. |
| class GLNonOwnedContext : public GLContextReal { |
| public: |
| GLNonOwnedContext(GLShareGroup* share_group); |
| |
| // Implement GLContext. |
| bool Initialize(GLSurface* compatible_surface, |
| GpuPreference gpu_preference) override; |
| bool MakeCurrent(GLSurface* surface) override; |
| void ReleaseCurrent(GLSurface* surface) override {} |
| bool IsCurrent(GLSurface* surface) override { return true; } |
| void* GetHandle() override { return nullptr; } |
| void OnSetSwapInterval(int interval) override {} |
| std::string GetExtensions() override; |
| |
| protected: |
| ~GLNonOwnedContext() override {} |
| |
| private: |
| EGLDisplay display_; |
| |
| DISALLOW_COPY_AND_ASSIGN(GLNonOwnedContext); |
| }; |
| |
| GLNonOwnedContext::GLNonOwnedContext(GLShareGroup* share_group) |
| : GLContextReal(share_group), display_(nullptr) {} |
| |
| bool GLNonOwnedContext::Initialize(GLSurface* compatible_surface, |
| GpuPreference gpu_preference) { |
| display_ = eglGetDisplay(EGL_DEFAULT_DISPLAY); |
| return true; |
| } |
| |
| bool GLNonOwnedContext::MakeCurrent(GLSurface* surface) { |
| SetCurrent(surface); |
| SetRealGLApi(); |
| return true; |
| } |
| |
| std::string GLNonOwnedContext::GetExtensions() { |
| const char* extensions = eglQueryString(display_, EGL_EXTENSIONS); |
| if (!extensions) |
| return GLContext::GetExtensions(); |
| |
| return GLContext::GetExtensions() + " " + extensions; |
| } |
| |
| } // anonymous namespace |
| |
| // static |
| scoped_refptr<GLContext> GLContext::CreateGLContext( |
| GLShareGroup* share_group, |
| GLSurface* compatible_surface, |
| GpuPreference gpu_preference) { |
| scoped_refptr<GLContext> context; |
| switch (GetGLImplementation()) { |
| case kGLImplementationMockGL: |
| return scoped_refptr<GLContext>(new GLContextStub()); |
| case kGLImplementationOSMesaGL: |
| context = new GLContextOSMesa(share_group); |
| break; |
| default: |
| if (compatible_surface->GetHandle()) |
| context = new GLContextEGL(share_group); |
| else |
| context = new GLNonOwnedContext(share_group); |
| break; |
| } |
| |
| if (!context->Initialize(compatible_surface, gpu_preference)) |
| return nullptr; |
| |
| return context; |
| } |
| |
| } |