1 /* This file is part of SDL_gles - SDL addon for OpenGL|ES
2 * Copyright (C) 2010 Javier S. Pedro
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 3 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA or see <http://www.gnu.org/licenses/>.
23 /* Set up for C function definitions, even when using C++ */
28 /** OpenGL ES versions compatible with this library. */
29 typedef enum SDL_GLES_Version
31 SDL_GLES_VERSION_NONE = 0,
33 SDL_GLES_VERSION_1_1 = 1,
35 SDL_GLES_VERSION_2_0 = 2
38 /** Context attributes. */
39 typedef enum SDL_GLES_Attr
41 SDL_GLES_BUFFER_SIZE = 0,
46 SDL_GLES_LUMINANCE_SIZE,
51 /** Represents a EGL context.
52 A context is where all textures, etc. are stored.
54 typedef struct SDL_GLES_Context
56 /* Opaque pointer to an EGLContext */
59 /** Invoke after SDL_Init.
60 You need to call this before any other routine in this library.
61 @param version selects the OpenGL ES version to use.
62 @return 0 if SDL_gles was initialized correctly; any other value
63 if the initialization failed. You can then check for errrors using
66 extern DECLSPEC int SDLCALL SDL_GLES_Init(SDL_GLES_Version version);
68 /** Invoke just before SDL_Quit.
69 Closes the connection with the graphics accelerator. After a call to
70 SDL_GLES_Quit(), you must not call any other function in this library.
72 extern DECLSPEC void SDLCALL SDL_GLES_Quit();
74 /** Call before calling GetProcAddress. Dynamically loads a GLES library.
75 * @param path full path to the library to load, or leave as NULL to load
76 * the default GL ES library (version as specified in SDL_GLES_Init()).
77 * @return 0 if everything went OK.
79 extern DECLSPEC int SDLCALL SDL_GLES_LoadLibrary(const char *path);
80 /** Returns the address of a symbol in the loaded GL ES library.
81 * @param proc name of the symbol to look up.
82 * @return address of the symbol or NULL.
84 extern DECLSPEC void* SDLCALL SDL_GLES_GetProcAddress(const char *proc);
86 /** Creates a new GL ES rendering context. This is where all your textures,
87 * etc. are stored. You need one for rendering; after creating it, make sure
88 * it is the current one calling SDL_GLES_MakeCurrent().
89 * @return the created context or NULL.
91 extern DECLSPEC SDL_GLES_Context* SDLCALL SDL_GLES_CreateContext(void);
92 /** Deletes an existing GL ES rendering context. This can delete the current
93 * context, but after that no context will be current.
94 * @param context context to delete
96 extern DECLSPEC void SDLCALL SDL_GLES_DeleteContext(SDL_GLES_Context *context);
98 /** Call after calling SDL_SetVideoMode() if you have an active context
99 * to refresh the surface parameters.
100 * @return 0 if everything went OK.
102 extern DECLSPEC int SDLCALL SDL_GLES_SetVideoMode(void);
103 /** Makes a context the current one. All GLES calls will use it from now on.
104 * @param context context to use
105 * @return 0 if everything went OK.
107 extern DECLSPEC int SDLCALL SDL_GLES_MakeCurrent(SDL_GLES_Context *context);
109 /** Equivalent to SDL_Flip(). Call when you're finished issuing GL calls
110 * and want to draw the color buffer contents to the window surface.
112 extern DECLSPEC void SDLCALL SDL_GLES_SwapBuffers(void);
114 /** Sets a specific context attribute (before calling SDL_CreateContext()).
115 * @param attr attribute to set
116 * @param value new value
117 * @return 0 if the attribute exists, -1 otherwise.
119 extern DECLSPEC int SDLCALL SDL_GLES_SetAttribute(SDL_GLES_Attr attr, int value);
121 /** Gets a context attribute from the current context, or from the wanted
122 * attribute set if no context is current.
123 * @param attr attribute to get
124 * @param value pointer where the result will be stored.
125 * @return 0 if the attribute exists, -1 otherwise.
127 extern DECLSPEC int SDLCALL SDL_GLES_GetAttribute(SDL_GLES_Attr attr, int *value);
129 /* Ends C function definitions when using C++ */