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
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gl/SkNativeGLContext.h"
#include "SkWGL.h"
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
SkNativeGLContext::AutoContextRestore::AutoContextRestore() {
fOldHGLRC = wglGetCurrentContext();
fOldHDC = wglGetCurrentDC();
}
SkNativeGLContext::AutoContextRestore::~AutoContextRestore() {
wglMakeCurrent(fOldHDC, fOldHGLRC);
}
///////////////////////////////////////////////////////////////////////////////
ATOM SkNativeGLContext::gWC = 0;
SkNativeGLContext::SkNativeGLContext()
: fWindow(NULL)
, fDeviceContext(NULL)
, fGlRenderContext(0) {
}
SkNativeGLContext::~SkNativeGLContext() {
this->destroyGLContext();
}
void SkNativeGLContext::destroyGLContext() {
if (fGlRenderContext) {
wglDeleteContext(fGlRenderContext);
}
if (fWindow && fDeviceContext) {
ReleaseDC(fWindow, fDeviceContext);
}
if (fWindow) {
DestroyWindow(fWindow);
}
}
const GrGLInterface* SkNativeGLContext::createGLContext() {
HINSTANCE hInstance = (HINSTANCE)GetModuleHandle(NULL);
if (!gWC) {
WNDCLASS wc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hbrBackground = NULL;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hInstance = hInstance;
wc.lpfnWndProc = (WNDPROC) DefWindowProc;
wc.lpszClassName = TEXT("Griffin");
wc.lpszMenuName = NULL;
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
gWC = RegisterClass(&wc);
if (!gWC) {
SkDebugf("Could not register window class.\n");
return NULL;
}
}
if (!(fWindow = CreateWindow(TEXT("Griffin"),
TEXT("The Invisible Man"),
WS_OVERLAPPEDWINDOW,
0, 0, 1, 1,
NULL, NULL,
hInstance, NULL))) {
SkDebugf("Could not create window.\n");
return NULL;
}
if (!(fDeviceContext = GetDC(fWindow))) {
SkDebugf("Could not get device context.\n");
this->destroyGLContext();
return NULL;
}
// Requesting a Core profile would bar us from using NVPR. So we pass false.
if (!(fGlRenderContext = SkCreateWGLContext(fDeviceContext, 0, false))) {
SkDebugf("Could not create rendering context.\n");
this->destroyGLContext();
return NULL;
}
if (!(wglMakeCurrent(fDeviceContext, fGlRenderContext))) {
SkDebugf("Could not set the context.\n");
this->destroyGLContext();
return NULL;
}
const GrGLInterface* interface = GrGLCreateNativeInterface();
if (NULL == interface) {
SkDebugf("Could not create GL interface.\n");
this->destroyGLContext();
return NULL;
}
return interface;
}
void SkNativeGLContext::makeCurrent() const {
if (!wglMakeCurrent(fDeviceContext, fGlRenderContext)) {
SkDebugf("Could not create rendering context.\n");
}
}
void SkNativeGLContext::swapBuffers() const {
if (!SwapBuffers(fDeviceContext)) {
SkDebugf("Could not complete SwapBuffers.\n");
}
}
|
