1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ui/gl/gl_fence.h" 6 7 #include "base/compiler_specific.h" 8 #include "ui/gl/gl_bindings.h" 9 #include "ui/gl/gl_context.h" 10 #include "ui/gl/gl_fence_arb.h" 11 #include "ui/gl/gl_fence_egl.h" 12 #include "ui/gl/gl_fence_nv.h" 13 #include "ui/gl/gl_gl_api_implementation.h" 14 #include "ui/gl/gl_version_info.h" 15 16 namespace gfx { 17 18 namespace { 19 20 // static CreateFence(bool flush)21GLFence* CreateFence(bool flush) { 22 DCHECK(GLContext::GetCurrent()) 23 << "Trying to create fence with no context"; 24 25 scoped_ptr<GLFence> fence; 26 // Prefer ARB_sync which supports server-side wait. 27 if (g_driver_gl.ext.b_GL_ARB_sync || 28 GetGLVersionInfo()->is_es3) { 29 fence.reset(new GLFenceARB(flush)); 30 #if !defined(OS_MACOSX) 31 } else if (g_driver_egl.ext.b_EGL_KHR_fence_sync) { 32 fence.reset(new GLFenceEGL(flush)); 33 #endif 34 } else if (g_driver_gl.ext.b_GL_NV_fence) { 35 fence.reset(new GLFenceNV(flush)); 36 } 37 38 DCHECK_EQ(!!fence.get(), GLFence::IsSupported()); 39 return fence.release(); 40 } 41 42 } // namespace 43 GLFence()44GLFence::GLFence() { 45 } 46 ~GLFence()47GLFence::~GLFence() { 48 } 49 IsSupported()50bool GLFence::IsSupported() { 51 DCHECK(GetGLVersionInfo()); 52 return g_driver_gl.ext.b_GL_ARB_sync || GetGLVersionInfo()->is_es3 || 53 #if !defined(OS_MACOSX) 54 g_driver_egl.ext.b_EGL_KHR_fence_sync || 55 #endif 56 g_driver_gl.ext.b_GL_NV_fence; 57 } 58 Create()59GLFence* GLFence::Create() { 60 return CreateFence(true); 61 } 62 CreateWithoutFlush()63GLFence* GLFence::CreateWithoutFlush() { 64 return CreateFence(false); 65 } 66 67 } // namespace gfx 68