| // Copyright 2016 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/init/gl_factory.h" |
| |
| #include "base/logging.h" |
| #include "base/macros.h" |
| #include "base/trace_event/trace_event.h" |
| #include "ui/gl/gl_bindings.h" |
| #include "ui/gl/gl_context_cgl.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_share_group.h" |
| #include "ui/gl/gl_surface.h" |
| #include "ui/gl/gl_surface_osmesa.h" |
| #include "ui/gl/gl_surface_stub.h" |
| |
| namespace gl { |
| namespace init { |
| |
| namespace { |
| |
| // A "no-op" surface. It is not required that a CGLContextObj have an |
| // associated drawable (pbuffer or fullscreen context) in order to be |
| // made current. Everywhere this surface type is used, we allocate an |
| // FBO at the user level as the drawable of the associated context. |
| class NoOpGLSurface : public GLSurface { |
| public: |
| explicit NoOpGLSurface(const gfx::Size& size) : size_(size) {} |
| |
| // Implement GLSurface. |
| bool Initialize(GLSurface::Format format) override { return true; } |
| void Destroy() override {} |
| bool IsOffscreen() override { return true; } |
| gfx::SwapResult SwapBuffers() override { |
| NOTREACHED() << "Cannot call SwapBuffers on a NoOpGLSurface."; |
| return gfx::SwapResult::SWAP_FAILED; |
| } |
| gfx::Size GetSize() override { return size_; } |
| void* GetHandle() override { return nullptr; } |
| void* GetDisplay() override { return nullptr; } |
| bool IsSurfaceless() const override { return true; } |
| |
| protected: |
| ~NoOpGLSurface() override {} |
| |
| private: |
| gfx::Size size_; |
| |
| DISALLOW_COPY_AND_ASSIGN(NoOpGLSurface); |
| }; |
| |
| } // namespace |
| |
| scoped_refptr<GLContext> CreateGLContext(GLShareGroup* share_group, |
| GLSurface* compatible_surface, |
| GpuPreference gpu_preference) { |
| TRACE_EVENT0("gpu", "gl::init::CreateGLContext"); |
| switch (GetGLImplementation()) { |
| case kGLImplementationDesktopGL: |
| case kGLImplementationDesktopGLCoreProfile: |
| case kGLImplementationAppleGL: |
| // Note that with virtualization we might still be able to make current |
| // a different onscreen surface with this context later. But we should |
| // always be creating the context with an offscreen surface first. |
| DCHECK(compatible_surface->IsOffscreen()); |
| return InitializeGLContext(new GLContextCGL(share_group), |
| compatible_surface, gpu_preference); |
| case kGLImplementationOSMesaGL: |
| return InitializeGLContext(new GLContextOSMesa(share_group), |
| compatible_surface, gpu_preference); |
| case kGLImplementationMockGL: |
| return new GLContextStub(share_group); |
| default: |
| NOTREACHED(); |
| return nullptr; |
| } |
| } |
| |
| scoped_refptr<GLSurface> CreateViewGLSurface(gfx::AcceleratedWidget window) { |
| TRACE_EVENT0("gpu", "gl::init::CreateViewGLSurface"); |
| switch (GetGLImplementation()) { |
| case kGLImplementationDesktopGL: |
| case kGLImplementationDesktopGLCoreProfile: |
| case kGLImplementationAppleGL: { |
| NOTIMPLEMENTED() << "No onscreen support on Mac."; |
| return nullptr; |
| } |
| case kGLImplementationOSMesaGL: { |
| return InitializeGLSurface(new GLSurfaceOSMesaHeadless()); |
| } |
| case kGLImplementationMockGL: |
| return new GLSurfaceStub; |
| default: |
| NOTREACHED(); |
| return nullptr; |
| } |
| } |
| |
| scoped_refptr<GLSurface> CreateOffscreenGLSurface(const gfx::Size& size) { |
| TRACE_EVENT0("gpu", "gl::init::CreateOffscreenGLSurface"); |
| switch (GetGLImplementation()) { |
| case kGLImplementationOSMesaGL: |
| return InitializeGLSurface( |
| new GLSurfaceOSMesa(GLSurface::SURFACE_OSMESA_RGBA, size)); |
| case kGLImplementationDesktopGL: |
| case kGLImplementationDesktopGLCoreProfile: |
| case kGLImplementationAppleGL: |
| return InitializeGLSurface(new NoOpGLSurface(size)); |
| case kGLImplementationMockGL: |
| return new GLSurfaceStub; |
| default: |
| NOTREACHED(); |
| return nullptr; |
| } |
| } |
| |
| } // namespace init |
| } // namespace gl |