168 lines
4.3 KiB
C
168 lines
4.3 KiB
C
/**************************************************************************
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*
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* Copyright 2008 VMware, Inc.
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* Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
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* Copyright 2010-2011 LunarG, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef EGLCONTEXT_INCLUDED
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#define EGLCONTEXT_INCLUDED
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#include "c99_compat.h"
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#include "egltypedefs.h"
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#include "egldisplay.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* "Base" class for device driver contexts.
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*/
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struct _egl_context
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{
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/* A context is a display resource */
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_EGLResource Resource;
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/* The bound status of the context */
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_EGLThreadInfo *Binding;
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_EGLSurface *DrawSurface;
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_EGLSurface *ReadSurface;
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_EGLConfig *Config;
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EGLint ClientAPI; /**< EGL_OPENGL_ES_API, EGL_OPENGL_API, EGL_OPENVG_API */
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EGLint ClientMajorVersion;
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EGLint ClientMinorVersion;
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EGLint Flags;
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EGLint Profile;
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EGLint ResetNotificationStrategy;
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EGLint ContextPriority;
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EGLBoolean NoError;
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EGLint ReleaseBehavior;
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/* The real render buffer when a window surface is bound */
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EGLint WindowRenderBuffer;
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};
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extern EGLBoolean
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_eglInitContext(_EGLContext *ctx, _EGLDisplay *dpy,
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_EGLConfig *config, const EGLint *attrib_list);
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extern EGLBoolean
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_eglQueryContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx, EGLint attribute, EGLint *value);
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extern EGLBoolean
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_eglBindContext(_EGLContext *ctx, _EGLSurface *draw, _EGLSurface *read,
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_EGLContext **old_ctx,
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_EGLSurface **old_draw, _EGLSurface **old_read);
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extern _EGLContext *
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_eglBindContextToThread(_EGLContext *ctx, _EGLThreadInfo *t);
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/**
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* Increment reference count for the context.
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*/
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static inline _EGLContext *
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_eglGetContext(_EGLContext *ctx)
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{
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if (ctx)
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_eglGetResource(&ctx->Resource);
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return ctx;
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}
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/**
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* Decrement reference count for the context.
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*/
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static inline EGLBoolean
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_eglPutContext(_EGLContext *ctx)
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{
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return (ctx) ? _eglPutResource(&ctx->Resource) : EGL_FALSE;
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}
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/**
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* Link a context to its display and return the handle of the link.
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* The handle can be passed to client directly.
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*/
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static inline EGLContext
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_eglLinkContext(_EGLContext *ctx)
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{
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_eglLinkResource(&ctx->Resource, _EGL_RESOURCE_CONTEXT);
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return (EGLContext) ctx;
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}
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/**
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* Unlink a linked context from its display.
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* Accessing an unlinked context should generate EGL_BAD_CONTEXT error.
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*/
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static inline void
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_eglUnlinkContext(_EGLContext *ctx)
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{
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_eglUnlinkResource(&ctx->Resource, _EGL_RESOURCE_CONTEXT);
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}
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/**
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* Lookup a handle to find the linked context.
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* Return NULL if the handle has no corresponding linked context.
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*/
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static inline _EGLContext *
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_eglLookupContext(EGLContext context, _EGLDisplay *dpy)
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{
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_EGLContext *ctx = (_EGLContext *) context;
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if (!dpy || !_eglCheckResource((void *) ctx, _EGL_RESOURCE_CONTEXT, dpy))
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ctx = NULL;
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return ctx;
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}
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/**
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* Return the handle of a linked context, or EGL_NO_CONTEXT.
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*/
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static inline EGLContext
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_eglGetContextHandle(_EGLContext *ctx)
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{
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_EGLResource *res = (_EGLResource *) ctx;
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return (res && _eglIsResourceLinked(res)) ?
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(EGLContext) ctx : EGL_NO_CONTEXT;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* EGLCONTEXT_INCLUDED */
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