15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This file implements the GLContextWGL and PbufferGLContext classes. 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gl/gl_context_wgl.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/debug/trace_event.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gl/gl_bindings.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gl/gl_implementation.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gl/gl_surface_wgl.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace gfx { 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)GLContextWGL::GLContextWGL(GLShareGroup* share_group) 18868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) : GLContextReal(share_group), 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) context_(NULL) { 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)GLContextWGL::~GLContextWGL() { 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Destroy(); 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)std::string GLContextWGL::GetExtensions() { 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const char* extensions = NULL; 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (g_driver_wgl.fn.wglGetExtensionsStringARBFn) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) extensions = wglGetExtensionsStringARB(GLSurfaceWGL::GetDisplayDC()); 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else if (g_driver_wgl.fn.wglGetExtensionsStringEXTFn) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) extensions = wglGetExtensionsStringEXT(); 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (extensions) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return GLContext::GetExtensions() + " " + extensions; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return GLContext::GetExtensions(); 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool GLContextWGL::Initialize( 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) GLSurface* compatible_surface, GpuPreference gpu_preference) { 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Get the handle of another initialized context in the share group _before_ 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // setting context_. Otherwise this context will be considered initialized 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // and could potentially be returned by GetHandle. 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) HGLRC share_handle = static_cast<HGLRC>(share_group()->GetHandle()); 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) context_ = wglCreateContext( 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static_cast<HDC>(compatible_surface->GetHandle())); 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!context_) { 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "Failed to create GL context."; 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Destroy(); 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (share_handle) { 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!wglShareLists(share_handle, context_)) { 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "Could not share GL contexts."; 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Destroy(); 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void GLContextWGL::Destroy() { 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (context_) { 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wglDeleteContext(context_); 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) context_ = NULL; 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool GLContextWGL::MakeCurrent(GLSurface* surface) { 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(context_); 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (IsCurrent(surface)) 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 77e5d81f57cb97b3b6b7fccc9c5610d21eb81db09dBen Murdoch ScopedReleaseCurrent release_current; 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) TRACE_EVENT0("gpu", "GLContextWGL::MakeCurrent"); 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!wglMakeCurrent(static_cast<HDC>(surface->GetHandle()), context_)) { 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "Unable to make gl context current."; 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 857d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) // Set this as soon as the context is current, since we might call into GL. 867d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) SetRealGLApi(); 877d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) 88868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) SetCurrent(surface); 895d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) if (!InitializeDynamicBindings()) { 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!surface->OnMakeCurrent(this)) { 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(ERROR) << "Could not make current."; 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 98e5d81f57cb97b3b6b7fccc9c5610d21eb81db09dBen Murdoch release_current.Cancel(); 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void GLContextWGL::ReleaseCurrent(GLSurface* surface) { 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!IsCurrent(surface)) 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 106868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) SetCurrent(NULL); 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wglMakeCurrent(NULL, NULL); 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool GLContextWGL::IsCurrent(GLSurface* surface) { 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool native_context_is_current = 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wglGetCurrentContext() == context_; 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If our context is current then our notion of which GLContext is 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // current must be correct. On the other hand, third-party code 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // using OpenGL might change the current context. 117868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) DCHECK(!native_context_is_current || (GetRealCurrent() == this)); 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!native_context_is_current) 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (surface) { 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (wglGetCurrentDC() != surface->GetHandle()) 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void* GLContextWGL::GetHandle() { 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return context_; 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void GLContextWGL::SetSwapInterval(int interval) { 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(IsCurrent(NULL)); 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (gfx::g_driver_wgl.ext.b_WGL_EXT_swap_control) { 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) wglSwapIntervalEXT(interval); 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) LOG(WARNING) << 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) "Could not disable vsync: driver does not " 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) "support WGL_EXT_swap_control"; 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace gfx 146