ovr_sdk

view LibOVR/Src/Displays/OVR_Linux_SDKWindow.h @ 0:1b39a1b46319

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initial 0.4.4
author John Tsiombikas <nuclear@member.fsf.org>
date Wed, 14 Jan 2015 06:51:16 +0200
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1 /*******************************************************************************
2
3 Filename : OVR_Linux_SDKWindow.h
4 Content : SDK generated Linux window.
5 Created : October 1, 2014
6 Authors : James Hughes
7
8 Copyright : Copyright 2014 Oculus VR, LLC All Rights reserved.
9
10 Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License");
11 you may not use the Oculus VR Rift SDK except in compliance with the License,
12 which is provided at the time of installation or download, or which
13 otherwise accompanies this software in either electronic or hard copy form.
14
15 You may obtain a copy of the License at
16
17 http://www.oculusvr.com/licenses/LICENSE-3.2
18
19 Unless required by applicable law or agreed to in writing, the Oculus VR SDK
20 distributed under the License is distributed on an "AS IS" BASIS,
21 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
22 See the License for the specific language governing permissions and
23 limitations under the License.
24
25 *******************************************************************************/
26
27 #ifndef OVR_Linux_SDKWindow_h
28 #define OVR_Linux_SDKWindow_h
29
30 #include "../OVR_CAPI.h"
31 #include "../CAPI/GL/CAPI_GL_Util.h"
32
33 #include <X11/Xlib.h>
34 #include <X11/Xatom.h>
35 #include <X11/extensions/Xrandr.h>
36 #include <X11/Xresource.h>
37 #include <GL/glx.h>
38
39 namespace OVR {
40
41 enum DistortionRotation
42 {
43 DistRotateNone,
44 DistRotateCCW90
45 };
46
47 struct LinuxDeviceScreen
48 {
49 LinuxDeviceScreen() :
50 screen(-1),
51 crtcid(0),
52 rotation(DistRotateNone),
53 productCode(-1),
54 width(-1),
55 height(-1),
56 offsetX(-1),
57 offsetY(-1)
58 {}
59
60 void set(int xScreen, XID xid, DistortionRotation rot, int prodCode,
61 int w, int h, int x, int y)
62 {
63 screen = xScreen;
64 crtcid = xid;
65 rotation = rot;
66 productCode = prodCode;
67
68 width = w;
69 height = h;
70 offsetX = x;
71 offsetY = y;
72 }
73
74 bool isValid() {return (screen != -1);}
75
76 int screen; ///< X Screen this device occupies.
77 XID crtcid; ///< XID uniquely identifying this device on XDisplay.
78 DistortionRotation rotation;
79 int productCode;
80
81 // Actual width and height of screen.
82 int width;
83 int height;
84
85 // Offset if using twinview
86 int offsetX;
87 int offsetY;
88 };
89
90 class SDKWindow
91 {
92 public:
93
94 SDKWindow(const ovrHmd& hmd);
95 ~SDKWindow();
96
97 /// Rotation necessary to correctly orient this SDK window.
98 DistortionRotation GetDistortionRotation() {return mDeviceScreen.rotation;}
99
100 struct _XDisplay* GetDisplay() {return mXDisplay;}
101 XVisualInfo* GetVisual() {return mXVisual;}
102 Window GetDrawable() {return mXWindow;}
103 bool HasValidWindow() {return (mXWindow != 0);}
104
105 // Choose frame buffer configuration and return fbConfigID. Returns -1 if
106 // a failure occurs.
107 static int chooseFBConfigID(struct _XDisplay* display, int xscreen);
108
109 // Obtain visual from frame buffer configuration ID. You must call XFree
110 // on the XVisualInfo* pointer.
111 static XVisualInfo* getVisual(struct _XDisplay* display,
112 int fbConfigID, int xscreen);
113
114 // GLXFBConfig pointer from frame buffer configuration ID. You must call
115 // XFree on the GLXFBConfig pointer.
116 static GLXFBConfig* getGLXFBConfig(struct _XDisplay* display,
117 int fbConfigID, int xscreen);
118
119 static LinuxDeviceScreen findDevScreenForHMD(const ovrHmd& hmd);
120 static LinuxDeviceScreen findDevScreenForDevID(const char* deviceID);
121
122 static DistortionRotation getRotation(const ovrHmd& hmd);
123
124 // Obtains XVisualInfo for currently bound context. Returns true if a
125 // visual was successfully obtained. False otherwise.
126 static bool getVisualFromDrawable(GLXDrawable drawable, XVisualInfo* vinfoOut);
127
128 private:
129
130 /// Constructs SDK window on the given device screen.
131 void buildVisualAndWindow(const LinuxDeviceScreen& devScreen);
132
133 // Added m in front of variables so as to not conflict with X names.
134 struct _XDisplay* mXDisplay;
135 int mXScreen;
136 XVisualInfo* mXVisual;
137 XContext mXUniqueContext;
138 Window mXWindow;
139 int mFBConfigID;
140
141 LinuxDeviceScreen mDeviceScreen;
142 };
143
144
145 } // namespace OVR
146
147 #endif // OVR_Linux_SDKWindow_h