1 /************************************************************************** 2 * 3 * Copyright 2008 VMware, Inc. 4 * Copyright 2009-2010 Chia-I Wu <olvaffe (at) gmail.com> 5 * Copyright 2010-2011 LunarG, Inc. 6 * All Rights Reserved. 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a 9 * copy of this software and associated documentation files (the 10 * "Software"), to deal in the Software without restriction, including 11 * without limitation the rights to use, copy, modify, merge, publish, 12 * distribute, sub license, and/or sell copies of the Software, and to 13 * permit persons to whom the Software is furnished to do so, subject to 14 * the following conditions: 15 * 16 * The above copyright notice and this permission notice (including the 17 * next paragraph) shall be included in all copies or substantial portions 18 * of the Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 26 * DEALINGS IN THE SOFTWARE. 27 * 28 **************************************************************************/ 29 30 31 #ifndef EGLCONTEXT_INCLUDED 32 #define EGLCONTEXT_INCLUDED 33 34 #include "c99_compat.h" 35 36 #include "egltypedefs.h" 37 #include "egldisplay.h" 38 39 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 /** 45 * "Base" class for device driver contexts. 46 */ 47 struct _egl_context 48 { 49 /* A context is a display resource */ 50 _EGLResource Resource; 51 52 /* The bound status of the context */ 53 _EGLThreadInfo *Binding; 54 _EGLSurface *DrawSurface; 55 _EGLSurface *ReadSurface; 56 57 _EGLConfig *Config; 58 59 EGLint ClientAPI; /**< EGL_OPENGL_ES_API, EGL_OPENGL_API, EGL_OPENVG_API */ 60 EGLint ClientMajorVersion; 61 EGLint ClientMinorVersion; 62 EGLint Flags; 63 EGLint Profile; 64 EGLint ResetNotificationStrategy; 65 66 /* The real render buffer when a window surface is bound */ 67 EGLint WindowRenderBuffer; 68 }; 69 70 71 extern EGLBoolean 72 _eglInitContext(_EGLContext *ctx, _EGLDisplay *dpy, 73 _EGLConfig *config, const EGLint *attrib_list); 74 75 76 extern EGLBoolean 77 _eglQueryContext(_EGLDriver *drv, _EGLDisplay *dpy, _EGLContext *ctx, EGLint attribute, EGLint *value); 78 79 80 extern EGLBoolean 81 _eglBindContext(_EGLContext *ctx, _EGLSurface *draw, _EGLSurface *read, 82 _EGLContext **old_ctx, 83 _EGLSurface **old_draw, _EGLSurface **old_read); 84 85 86 /** 87 * Increment reference count for the context. 88 */ 89 static inline _EGLContext * 90 _eglGetContext(_EGLContext *ctx) 91 { 92 if (ctx) 93 _eglGetResource(&ctx->Resource); 94 return ctx; 95 } 96 97 98 /** 99 * Decrement reference count for the context. 100 */ 101 static inline EGLBoolean 102 _eglPutContext(_EGLContext *ctx) 103 { 104 return (ctx) ? _eglPutResource(&ctx->Resource) : EGL_FALSE; 105 } 106 107 108 /** 109 * Link a context to its display and return the handle of the link. 110 * The handle can be passed to client directly. 111 */ 112 static inline EGLContext 113 _eglLinkContext(_EGLContext *ctx) 114 { 115 _eglLinkResource(&ctx->Resource, _EGL_RESOURCE_CONTEXT); 116 return (EGLContext) ctx; 117 } 118 119 120 /** 121 * Unlink a linked context from its display. 122 * Accessing an unlinked context should generate EGL_BAD_CONTEXT error. 123 */ 124 static inline void 125 _eglUnlinkContext(_EGLContext *ctx) 126 { 127 _eglUnlinkResource(&ctx->Resource, _EGL_RESOURCE_CONTEXT); 128 } 129 130 131 /** 132 * Lookup a handle to find the linked context. 133 * Return NULL if the handle has no corresponding linked context. 134 */ 135 static inline _EGLContext * 136 _eglLookupContext(EGLContext context, _EGLDisplay *dpy) 137 { 138 _EGLContext *ctx = (_EGLContext *) context; 139 if (!dpy || !_eglCheckResource((void *) ctx, _EGL_RESOURCE_CONTEXT, dpy)) 140 ctx = NULL; 141 return ctx; 142 } 143 144 145 /** 146 * Return the handle of a linked context, or EGL_NO_CONTEXT. 147 */ 148 static inline EGLContext 149 _eglGetContextHandle(_EGLContext *ctx) 150 { 151 _EGLResource *res = (_EGLResource *) ctx; 152 return (res && _eglIsResourceLinked(res)) ? 153 (EGLContext) ctx : EGL_NO_CONTEXT; 154 } 155 156 157 #ifdef __cplusplus 158 } 159 #endif 160 161 #endif /* EGLCONTEXT_INCLUDED */ 162