eglcontext.h revision ecb3b3102a3022e31cf9d75ae099eddbe298517f 
1
2#ifndef EGLCONTEXT_INCLUDED
3#define EGLCONTEXT_INCLUDED
4
5
6#include "egltypedefs.h"
7#include "egldisplay.h"
8
9
10/**
11 * "Base" class for device driver contexts.
12 */
13struct _egl_context
14{
15   /* A context is a display resource */
16   _EGLResource Resource;
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
68/**
69 * Link a context to a display and return the handle of the link.
70 * The handle can be passed to client directly.
71 */
72static INLINE EGLContext
73_eglLinkContext(_EGLContext *ctx, _EGLDisplay *dpy)
74{
75   _eglLinkResource(&ctx->Resource, _EGL_RESOURCE_CONTEXT, dpy);
76   return (EGLContext) ctx;
77}
78
79
80/**
81 * Unlink a linked context from its display.
82 * Accessing an unlinked context should generate EGL_BAD_CONTEXT error.
83 */
84static INLINE void
85_eglUnlinkContext(_EGLContext *ctx)
86{
87   _eglUnlinkResource(&ctx->Resource, _EGL_RESOURCE_CONTEXT);
88}
89
90
91/**
92 * Lookup a handle to find the linked context.
93 * Return NULL if the handle has no corresponding linked context.
94 */
95static INLINE _EGLContext *
96_eglLookupContext(EGLContext context, _EGLDisplay *dpy)
97{
98   _EGLResource *res = (_EGLResource *) context;
99   _EGLContext *ctx = (_EGLContext *) context;
100   if (!res || !dpy || !_eglCheckResource(res, _EGL_RESOURCE_CONTEXT, dpy))
101      ctx = NULL;
102   return ctx;
103}
104
105
106/**
107 * Return the handle of a linked context, or EGL_NO_CONTEXT.
108 */
109static INLINE EGLContext
110_eglGetContextHandle(_EGLContext *ctx)
111{
112   _EGLResource *res = (_EGLResource *) ctx;
113   return (res && _eglIsResourceLinked(res)) ?
114      (EGLContext) ctx : EGL_NO_CONTEXT;
115}
116
117
118/**
119 * Return true if the context is linked to a display.
120 */
121static INLINE EGLBoolean
122_eglIsContextLinked(_EGLContext *ctx)
123{
124   _EGLResource *res = (_EGLResource *) ctx;
125   return (res && _eglIsResourceLinked(res));
126}
127
128
129#endif /* EGLCONTEXT_INCLUDED */
130