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.
5 #include "ui/gl/gl_surface.h"
7 #include <OpenGL/CGLRenderers.h>
9 #include "base/basictypes.h"
10 #include "base/debug/trace_event.h"
11 #include "base/logging.h"
12 #include "base/mac/mac_util.h"
13 #include "base/memory/scoped_ptr.h"
14 #include "ui/gl/gl_bindings.h"
15 #include "ui/gl/gl_context.h"
16 #include "ui/gl/gl_implementation.h"
17 #include "ui/gl/gl_surface_osmesa.h"
18 #include "ui/gl/gl_surface_stub.h"
19 #include "ui/gl/gpu_switching_manager.h"
24 // A "no-op" surface. It is not required that a CGLContextObj have an
25 // associated drawable (pbuffer or fullscreen context) in order to be
26 // made current. Everywhere this surface type is used, we allocate an
27 // FBO at the user level as the drawable of the associated context.
28 class GL_EXPORT NoOpGLSurface
: public GLSurface
{
30 explicit NoOpGLSurface(const gfx::Size
& size
) : size_(size
) {}
32 // Implement GLSurface.
33 virtual bool Initialize() OVERRIDE
{ return true; }
34 virtual void Destroy() OVERRIDE
{}
35 virtual bool IsOffscreen() OVERRIDE
{ return true; }
36 virtual bool SwapBuffers() OVERRIDE
{
37 NOTREACHED() << "Cannot call SwapBuffers on a NoOpGLSurface.";
40 virtual gfx::Size
GetSize() OVERRIDE
{ return size_
; }
41 virtual void* GetHandle() OVERRIDE
{ return NULL
; }
42 virtual void* GetDisplay() OVERRIDE
{ return NULL
; }
45 virtual ~NoOpGLSurface() {}
50 DISALLOW_COPY_AND_ASSIGN(NoOpGLSurface
);
54 bool InitializeOneOffForSandbox() {
55 static bool initialized
= false;
59 // This is called from the sandbox warmup code on Mac OS X.
60 // GPU-related stuff is very slow without this, probably because
61 // the sandbox prevents loading graphics drivers or some such.
62 std::vector
<CGLPixelFormatAttribute
> attribs
;
63 if (ui::GpuSwitchingManager::GetInstance()->SupportsDualGpus()) {
64 // Avoid switching to the discrete GPU just for this pixel
66 attribs
.push_back(kCGLPFAAllowOfflineRenderers
);
68 if (GetGLImplementation() == kGLImplementationAppleGL
) {
69 attribs
.push_back(kCGLPFARendererID
);
70 attribs
.push_back(static_cast<CGLPixelFormatAttribute
>(
71 kCGLRendererGenericFloatID
));
73 attribs
.push_back(static_cast<CGLPixelFormatAttribute
>(0));
75 CGLPixelFormatObj format
;
76 GLint num_pixel_formats
;
77 if (CGLChoosePixelFormat(&attribs
.front(),
79 &num_pixel_formats
) != kCGLNoError
) {
80 LOG(ERROR
) << "Error choosing pixel format.";
84 LOG(ERROR
) << "format == 0.";
87 CGLReleasePixelFormat(format
);
88 DCHECK_NE(num_pixel_formats
, 0);
95 bool GLSurface::InitializeOneOffInternal() {
96 switch (GetGLImplementation()) {
97 case kGLImplementationDesktopGL
:
98 case kGLImplementationAppleGL
:
99 if (!InitializeOneOffForSandbox()) {
100 LOG(ERROR
) << "GLSurfaceCGL::InitializeOneOff failed.";
110 scoped_refptr
<GLSurface
> GLSurface::CreateViewGLSurface(
111 gfx::AcceleratedWidget window
) {
112 TRACE_EVENT0("gpu", "GLSurface::CreateViewGLSurface");
113 switch (GetGLImplementation()) {
114 case kGLImplementationDesktopGL
:
115 case kGLImplementationAppleGL
: {
116 NOTIMPLEMENTED() << "No onscreen support on Mac.";
119 case kGLImplementationOSMesaGL
: {
120 scoped_refptr
<GLSurface
> surface(new GLSurfaceOSMesaHeadless());
121 if (!surface
->Initialize())
125 case kGLImplementationMockGL
:
126 return new GLSurfaceStub
;
133 scoped_refptr
<GLSurface
> GLSurface::CreateOffscreenGLSurface(
134 const gfx::Size
& size
) {
135 TRACE_EVENT0("gpu", "GLSurface::CreateOffscreenGLSurface");
136 switch (GetGLImplementation()) {
137 case kGLImplementationOSMesaGL
: {
138 scoped_refptr
<GLSurface
> surface(
139 new GLSurfaceOSMesa(OSMesaSurfaceFormatRGBA
, size
));
140 if (!surface
->Initialize())
145 case kGLImplementationDesktopGL
:
146 case kGLImplementationAppleGL
: {
147 scoped_refptr
<GLSurface
> surface(new NoOpGLSurface(size
));
148 if (!surface
->Initialize())
153 case kGLImplementationMockGL
:
154 return new GLSurfaceStub
;