blob: 8533be7176be81349f0a470ca9ad0a494f8f1a0b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
// Copyright (c) 2011 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.
// This file implements the GLContextWGL and PbufferGLContext classes.
#include "ui/gfx/gl/gl_context_wgl.h"
#include "base/logging.h"
#include "ui/gfx/gl/gl_bindings.h"
#include "ui/gfx/gl/gl_implementation.h"
#include "ui/gfx/gl/gl_surface_wgl.h"
namespace gfx {
GLContextWGL::GLContextWGL(GLShareGroup* share_group)
: GLContext(share_group),
context_(NULL) {
}
GLContextWGL::~GLContextWGL() {
Destroy();
}
std::string GLContextWGL::GetExtensions() {
if (wglGetExtensionsStringARB) {
// TODO(apatrick): When contexts and surfaces are separated, we won't be
// able to use surface_ here. Either use a display device context or the
// surface that was passed to MakeCurrent.
const char* extensions = wglGetExtensionsStringARB(
GLSurfaceWGL::GetDisplay());
if (extensions) {
return GLContext::GetExtensions() + " " + extensions;
}
}
return GLContext::GetExtensions();
}
bool GLContextWGL::Initialize(GLSurface* compatible_surface) {
GLSurfaceWGL* surface_wgl = static_cast<GLSurfaceWGL*>(compatible_surface);
// TODO(apatrick): When contexts and surfaces are separated, we won't be
// able to use surface_ here. Either use a display device context or a
// surface that the context is compatible with not necessarily limited to
// rendering to.
context_ = wglCreateContext(static_cast<HDC>(surface_wgl->GetHandle()));
if (!context_) {
LOG(ERROR) << "Failed to create GL context.";
Destroy();
return false;
}
if (share_group()) {
HGLRC share_handle = static_cast<HGLRC>(share_group()->GetHandle());
if (share_handle) {
if (!wglShareLists(share_handle, context_)) {
LOG(ERROR) << "Could not share GL contexts.";
Destroy();
return false;
}
}
}
return true;
}
void GLContextWGL::Destroy() {
if (context_) {
wglDeleteContext(context_);
context_ = NULL;
}
}
bool GLContextWGL::MakeCurrent(GLSurface* surface) {
DCHECK(context_);
if (IsCurrent(surface))
return true;
if (!wglMakeCurrent(static_cast<HDC>(surface->GetHandle()), context_)) {
LOG(ERROR) << "Unable to make gl context current.";
return false;
}
return true;
}
void GLContextWGL::ReleaseCurrent(GLSurface* surface) {
if (!IsCurrent(surface))
return;
wglMakeCurrent(NULL, NULL);
}
bool GLContextWGL::IsCurrent(GLSurface* surface) {
if (wglGetCurrentContext() != context_)
return false;
if (surface) {
if (wglGetCurrentDC() != surface->GetHandle())
return false;
}
return true;
}
void* GLContextWGL::GetHandle() {
return context_;
}
void GLContextWGL::SetSwapInterval(int interval) {
DCHECK(IsCurrent(NULL));
if (HasExtension("WGL_EXT_swap_control") && wglSwapIntervalEXT) {
wglSwapIntervalEXT(interval);
} else {
LOG(WARNING) <<
"Could not disable vsync: driver does not "
"support WGL_EXT_swap_control";
}
}
} // namespace gfx
|
