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/**************************************************************************
*
* Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
* Copyright 2010-2011 LunarG, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#ifndef EGLCONTEXT_INCLUDED
#define EGLCONTEXT_INCLUDED
#include "egltypedefs.h"
#include "egldisplay.h"
/**
* "Base" class for device driver contexts.
*/
struct _egl_context
{
/* A context is a display resource */
_EGLResource Resource;
/* The bound status of the context */
_EGLThreadInfo *Binding;
_EGLSurface *DrawSurface;
_EGLSurface *ReadSurface;
_EGLConfig *Config;
EGLint ClientAPI; /**< EGL_OPENGL_ES_API, EGL_OPENGL_API, EGL_OPENVG_API */
EGLint ClientVersion; /**< 1 = OpenGLES 1.x, 2 = OpenGLES 2.x */
/* The real render buffer when a window surface is bound */
EGLint WindowRenderBuffer;
};
PUBLIC EGLBoolean
_eglInitContext(_EGLContext *ctx, _EGLDisplay *dpy,
_EGLConfig *config, const EGLint *attrib_list);
extern EGLBoolean
_eglQueryContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx, EGLint attribute, EGLint *value);
PUBLIC EGLBoolean
_eglBindContext(_EGLContext *ctx, _EGLSurface *draw, _EGLSurface *read,
_EGLContext **old_ctx,
_EGLSurface **old_draw, _EGLSurface **old_read);
/**
* Increment reference count for the context.
*/
static INLINE _EGLContext *
_eglGetContext(_EGLContext *ctx)
{
if (ctx)
_eglGetResource(&ctx->Resource);
return ctx;
}
/**
* Decrement reference count for the context.
*/
static INLINE EGLBoolean
_eglPutContext(_EGLContext *ctx)
{
return (ctx) ? _eglPutResource(&ctx->Resource) : EGL_FALSE;
}
/**
* Link a context to its display and return the handle of the link.
* The handle can be passed to client directly.
*/
static INLINE EGLContext
_eglLinkContext(_EGLContext *ctx)
{
_eglLinkResource(&ctx->Resource, _EGL_RESOURCE_CONTEXT);
return (EGLContext) ctx;
}
/**
* Unlink a linked context from its display.
* Accessing an unlinked context should generate EGL_BAD_CONTEXT error.
*/
static INLINE void
_eglUnlinkContext(_EGLContext *ctx)
{
_eglUnlinkResource(&ctx->Resource, _EGL_RESOURCE_CONTEXT);
}
/**
* Lookup a handle to find the linked context.
* Return NULL if the handle has no corresponding linked context.
*/
static INLINE _EGLContext *
_eglLookupContext(EGLContext context, _EGLDisplay *dpy)
{
_EGLContext *ctx = (_EGLContext *) context;
if (!dpy || !_eglCheckResource((void *) ctx, _EGL_RESOURCE_CONTEXT, dpy))
ctx = NULL;
return ctx;
}
/**
* Return the handle of a linked context, or EGL_NO_CONTEXT.
*/
static INLINE EGLContext
_eglGetContextHandle(_EGLContext *ctx)
{
_EGLResource *res = (_EGLResource *) ctx;
return (res && _eglIsResourceLinked(res)) ?
(EGLContext) ctx : EGL_NO_CONTEXT;
}
#endif /* EGLCONTEXT_INCLUDED */
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