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| 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 <GL/osmesa.h> | |
| 6 | |
| 7 #include "ui/gfx/gl/gl_context_osmesa.h" | |
| 8 | |
| 9 #include "base/logging.h" | |
| 10 #include "ui/gfx/gl/gl_bindings.h" | |
| 11 #include "ui/gfx/gl/gl_surface.h" | |
| 12 #include "ui/gfx/size.h" | |
| 13 | |
| 14 namespace gfx { | |
| 15 | |
| 16 GLContextOSMesa::GLContextOSMesa(GLShareGroup* share_group) | |
| 17 : GLContext(share_group), | |
| 18 context_(NULL) { | |
| 19 } | |
| 20 | |
| 21 bool GLContextOSMesa::Initialize(GLSurface* compatible_surface, | |
| 22 GpuPreference gpu_preference) { | |
| 23 DCHECK(!context_); | |
| 24 | |
| 25 OSMesaContext share_handle = static_cast<OSMesaContext>( | |
| 26 share_group() ? share_group()->GetHandle() : NULL); | |
| 27 | |
| 28 GLuint format = compatible_surface->GetFormat(); | |
| 29 DCHECK_NE(format, (unsigned)0); | |
| 30 context_ = OSMesaCreateContextExt(format, | |
| 31 0, // depth bits | |
| 32 0, // stencil bits | |
| 33 0, // accum bits | |
| 34 share_handle); | |
| 35 if (!context_) { | |
| 36 LOG(ERROR) << "OSMesaCreateContextExt failed."; | |
| 37 return false; | |
| 38 } | |
| 39 | |
| 40 return true; | |
| 41 } | |
| 42 | |
| 43 void GLContextOSMesa::Destroy() { | |
| 44 if (context_) { | |
| 45 OSMesaDestroyContext(static_cast<OSMesaContext>(context_)); | |
| 46 context_ = NULL; | |
| 47 } | |
| 48 } | |
| 49 | |
| 50 bool GLContextOSMesa::MakeCurrent(GLSurface* surface) { | |
| 51 DCHECK(context_); | |
| 52 | |
| 53 gfx::Size size = surface->GetSize(); | |
| 54 | |
| 55 if (!OSMesaMakeCurrent(context_, | |
| 56 surface->GetHandle(), | |
| 57 GL_UNSIGNED_BYTE, | |
| 58 size.width(), | |
| 59 size.height())) { | |
| 60 LOG(ERROR) << "OSMesaMakeCurrent failed."; | |
| 61 Destroy(); | |
| 62 return false; | |
| 63 } | |
| 64 | |
| 65 // Row 0 is at the top. | |
| 66 OSMesaPixelStore(OSMESA_Y_UP, 0); | |
| 67 | |
| 68 SetCurrent(this, surface); | |
| 69 if (!InitializeExtensionBindings()) { | |
| 70 ReleaseCurrent(surface); | |
| 71 return false; | |
| 72 } | |
| 73 | |
| 74 if (!surface->OnMakeCurrent(this)) { | |
| 75 LOG(ERROR) << "Could not make current."; | |
| 76 return false; | |
| 77 } | |
| 78 | |
| 79 return true; | |
| 80 } | |
| 81 | |
| 82 void GLContextOSMesa::ReleaseCurrent(GLSurface* surface) { | |
| 83 if (!IsCurrent(surface)) | |
| 84 return; | |
| 85 | |
| 86 SetCurrent(NULL, NULL); | |
| 87 OSMesaMakeCurrent(NULL, NULL, GL_UNSIGNED_BYTE, 0, 0); | |
| 88 } | |
| 89 | |
| 90 bool GLContextOSMesa::IsCurrent(GLSurface* surface) { | |
| 91 DCHECK(context_); | |
| 92 | |
| 93 bool native_context_is_current = | |
| 94 context_ == OSMesaGetCurrentContext(); | |
| 95 | |
| 96 // If our context is current then our notion of which GLContext is | |
| 97 // current must be correct. On the other hand, third-party code | |
| 98 // using OpenGL might change the current context. | |
| 99 DCHECK(!native_context_is_current || (GetCurrent() == this)); | |
| 100 | |
| 101 if (!native_context_is_current) | |
| 102 return false; | |
| 103 | |
| 104 if (surface) { | |
| 105 GLint width; | |
| 106 GLint height; | |
| 107 GLint format; | |
| 108 void* buffer = NULL; | |
| 109 OSMesaGetColorBuffer(context_, &width, &height, &format, &buffer); | |
| 110 if (buffer != surface->GetHandle()) | |
| 111 return false; | |
| 112 } | |
| 113 | |
| 114 return true; | |
| 115 } | |
| 116 | |
| 117 void* GLContextOSMesa::GetHandle() { | |
| 118 return context_; | |
| 119 } | |
| 120 | |
| 121 void GLContextOSMesa::SetSwapInterval(int interval) { | |
| 122 DCHECK(IsCurrent(NULL)); | |
| 123 LOG(WARNING) << "GLContextOSMesa::SetSwapInterval is ignored."; | |
| 124 } | |
| 125 | |
| 126 GLContextOSMesa::~GLContextOSMesa() { | |
| 127 Destroy(); | |
| 128 } | |
| 129 | |
| 130 } // namespace gfx | |
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Chromium Code Reviews
Issue 10392068:
ui: Move gl/ directory out of gfx/, up to ui/. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src