src/egl/main/eglcontext.h

   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  */
  13 struct _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
  33 PUBLIC EGLBoolean
  34 _eglInitContext(_EGLDriver *drv, _EGLContext *ctx,
  35                 _EGLConfig *config, const EGLint *attrib_list);
  36
  37
  38 extern _EGLContext *
  39 _eglCreateContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf, _EGLContext *share_list, const EGLint *attrib_list);
  40
  41
  42 extern EGLBoolean
  43 _eglDestroyContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx);
  44
  45
  46 extern EGLBoolean
  47 _eglQueryContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx, EGLint attribute, EGLint *value);
  48
  49
  50 PUBLIC EGLBoolean
  51 _eglMakeCurrent(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSurface *draw, _EGLSurface *read, _EGLContext *ctx);
  52
  53
  54 extern 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  */
  61 static 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  */
  72 static 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  */
  84 static 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  */
  95 static 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  */
 109 static 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  */
 121 static INLINE EGLBoolean
 122 _eglIsContextLinked(_EGLContext *ctx)
 123 {
 124    _EGLResource *res = (_EGLResource *) ctx;
 125    return (res && _eglIsResourceLinked(res));
 126 }
 127
 128
 129 #endif /* EGLCONTEXT_INCLUDED */