eglcontext.h revision 5e66d1893234b3002d71985c05253321d4cdedc4 
1
2#ifndef EGLCONTEXT_INCLUDED
3#define EGLCONTEXT_INCLUDED
4
5
6#include "egltypedefs.h"
7
8
9/**
10 * "Base" class for device driver contexts.
11 */
12struct _egl_context
13{
14   /* Managed by EGLDisplay for linking */
15   _EGLDisplay *Display;
16   _EGLContext *Next;
17
18   /* The bound status of the context */
19   _EGLThreadInfo *Binding;
20   _EGLSurface *DrawSurface;
21   _EGLSurface *ReadSurface;
22
23   _EGLConfig *Config;
24
25   EGLint ClientAPI; /**< EGL_OPENGL_ES_API, EGL_OPENGL_API, EGL_OPENVG_API */
26   EGLint ClientVersion; /**< 1 = OpenGLES 1.x, 2 = OpenGLES 2.x */
27
28   /* The real render buffer when a window surface is bound */
29   EGLint WindowRenderBuffer;
30};
31
32
33PUBLIC EGLBoolean
34_eglInitContext(_EGLDriver *drv, _EGLContext *ctx,
35                _EGLConfig *config, const EGLint *attrib_list);
36
37
38extern _EGLContext *
39_eglCreateContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf, _EGLContext *share_list, const EGLint *attrib_list);
40
41
42extern EGLBoolean
43_eglDestroyContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx);
44
45
46extern EGLBoolean
47_eglQueryContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx, EGLint attribute, EGLint *value);
48
49
50PUBLIC EGLBoolean
51_eglMakeCurrent(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *draw, _EGLSurface *read, _EGLContext *ctx);
52
53
54extern EGLBoolean
55_eglCopyContextMESA(_EGLDriver *drv, EGLDisplay dpy, EGLContext source, EGLContext dest, EGLint mask);
56
57
58/**
59 * Return true if the context is bound to a thread.
60 */
61static INLINE EGLBoolean
62_eglIsContextBound(_EGLContext *ctx)
63{
64   return (ctx->Binding != NULL);
65}
66
67
68extern EGLContext
69_eglLinkContext(_EGLContext *ctx, _EGLDisplay *dpy);
70
71
72extern void
73_eglUnlinkContext(_EGLContext *ctx);
74
75
76#ifndef _EGL_SKIP_HANDLE_CHECK
77
78
79extern EGLBoolean
80_eglCheckContextHandle(EGLContext ctx, _EGLDisplay *dpy);
81
82
83#else /* !_EGL_SKIP_HANDLE_CHECK */
84
85
86static INLINE EGLBoolean
87_eglCheckContextHandle(EGLContext ctx, _EGLDisplay *dpy)
88{
89   _EGLContext *c = (_EGLContext *) ctx;
90   return (dpy && c && c->Display == dpy);
91}
92
93
94#endif /* _EGL_SKIP_HANDLE_CHECK */
95
96
97/**
98 * Lookup a handle to find the linked context.
99 * Return NULL if the handle has no corresponding linked context.
100 */
101static INLINE _EGLContext *
102_eglLookupContext(EGLContext context, _EGLDisplay *dpy)
103{
104   _EGLContext *ctx = (_EGLContext *) context;
105   if (!_eglCheckContextHandle(context, dpy))
106      ctx = NULL;
107   return ctx;
108}
109
110
111/**
112 * Return the handle of a linked context, or EGL_NO_CONTEXT.
113 */
114static INLINE EGLContext
115_eglGetContextHandle(_EGLContext *ctx)
116{
117   return (EGLContext) ((ctx && ctx->Display) ? ctx : EGL_NO_CONTEXT);
118}
119
120
121/**
122 * Return true if the context is linked to a display.
123 */
124static INLINE EGLBoolean
125_eglIsContextLinked(_EGLContext *ctx)
126{
127   return (EGLBoolean) (_eglGetContextHandle(ctx) != EGL_NO_CONTEXT);
128}
129
130
131#endif /* EGLCONTEXT_INCLUDED */
132